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HomeMy WebLinkAboutWPO201300002 Plan - Stormwater 2013-03-20GENERAL NOTES 10, 250 SF OWNER: 04500-00-00-11000 PHASE ! — EXISTING BANK AND FUTURE COMMERCIAL/RETAIL & OFFICE USES (6.63 ACRES) 65,650 SF 04500-00-00-11100 SETBACKS: PUBLIC ROADS.• GROSS FLOOR AREA: FIRST GOLD LEAF LAND TRUST GROSS LEASABLE AREA: PARKING: 10' PARKING: PARKING REQUIREMENT FOR A SHOPPING CENTER = 4.75 SPACES PER 1000 GROSS LEASABLE P.O. BOX 1333 TRA VEL WA Y BUILDING: 50' 67,192 GLA CHARLOTTESVILLE, VA 22902 320 SPACES UNDISTURBED BUFFER: 20' 322 SPACES 045-00-00-11OA0 J6,480 GLA BUILDING: ZERO 174 SPACES RIVER HEIGHTS ASSOCIATES, LTD. BUILDING HEIGHTS BUILDING HEIGHT = 28'-10" FROM GROUND ELEVATION TO TOP OF PARAPET WALL. P.O. BOX 5548 BUILDING PEAK (FRONT FACADE TREATMENT) = 40'-0" =ROM G'DOUND ELEVATION TO THE TOP BUILDING SEPARA TION: BUILDING SEPARATION SHALL BE A MINIMUM OF 10' CHARLOTTESVILLE, VA 22901 UJ APPLICANT UNITED LAND CORPORATION HEIGHT IS WITHIN THE ALLOWED 35' HEIGHT REQUIREMENT WITHOUT ADDITIONAL SETBACKS. EXISTING/PROPOSED USE. 2315 SEMINOLE LANE to PROPOSED USE. 45,600 SF COMMERCIAL/RETAIL BUILDING ON PHASE !l CHARLOTTESVILLE, VA 22901 CURB & GUTTER WATERSHED: CONTACT- MR. WENDELL WOOD TOPO &SURVEY. TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SUf"✓EYOR ROUDABUSH, GALE & TELEPHONE: (434)975-3334 ASSOCIATES, FIELD VERIFIED IN SEPTEMBER 2012. ENGINEER: COLLINS ENGINEERING 1. BRICKNAIL AT THE SOUTHEAST CORNER OF THE DROP INLET (EL. 457.79) 200 GARRETT ST. SUITE K, 2. PAINTED SQUARE LOCATED AT THE NORTHWEST CORNER OF THE DROP INLET (457.44). CHARLOTTESVILLE, VA 22902 4. SOUTHEAST CORNER OF CONCRETE SLAB AT PROPANE "ANK (EL. 424.27) TELEPHONE. • (434)293-3719 ELEVATIONS ARE BASED ON NAD 83 DA TUM. EXISTING VEGETA TION: FAX. • (434)293-2813 CRI TICAL SLOPES. • CRITICAL SLOPE IMPACTS WERE PREVIOUSLY APPROVED WITH. THi: PHASE I CONTACT' MR. SCOTT COLLINS, P.E. DEVELOPMENT PLAN WITH THE APPROVAL OF SDP -2004-024 SDP -2004-045. THIS WAS EMAIL: scott@collins—engineering.com TAX MAP NO.: 04500-00-00-11000 (D.B. 1894/ PG. 386) FLOODPLAIN/WPO BUFFERS: THERE IS NO 100— YEAR FLOODPLAIN ON THIS SITE. THE 25' STREAM BUFFER IS SHOWN 04500-00-00-11100 (D.B. 1894/ PG. 386) 04500-00-00-11OA0 (D.B. 1894/ PG. 386) NO TE, PARCELS 45-1118 AND 45-111A (WHICH ARE WITHIN THE AREA: 04500-00-00-11000 — 8.187 ACRES IYORTHTOWN DEVELOPMENT) ARE NOT INCLUDED WITH THIS 04500-00-00-11100 — 5.930 ACRES S�TE PLAN. SEE THE EXISTING CONDITIONS SHEET FOR THE 04500-00-00-11OA0 — 0.740 ACRES L ;;CATION OF THESE PARCELS ZONING: (HC) HIGHWAY COMMERCIAL, (EC) ENTRANCE CORRIDOR 10, 250 SF & (AIA) AIRPORT IMPACT AREA PHASING: PHASE ! — EXISTING BANK AND FUTURE COMMERCIAL/RETAIL & OFFICE USES (6.63 ACRES) 65,650 SF PHASE 11 — PROPOSED COMMERCIAL/RETAIL BUILDING AND FUTURE RETAIL (8.92 ACRES) SETBACKS: PUBLIC ROADS.• GROSS FLOOR AREA: BUILDING. • 30' GROSS LEASABLE AREA: PARKING: 10' PARKING: PARKING REQUIREMENT FOR A SHOPPING CENTER = 4.75 SPACES PER 1000 GROSS LEASABLE RESIDENTIAL ZONING: TRA VEL WA Y BUILDING: 50' 67,192 GLA PARKING: 20' 320 SPACES UNDISTURBED BUFFER: 20' 322 SPACES COMMERCIAL ZONING: J6,480 GLA BUILDING: ZERO 174 SPACES PARKING: ZERO BUILDING HEIGHTS BUILDING HEIGHT = 28'-10" FROM GROUND ELEVATION TO TOP OF PARAPET WALL. MAXIMUM EMPLOYEES: 30 EMPLOYEES AT ONE BUILDING PEAK (FRONT FACADE TREATMENT) = 40'-0" =ROM G'DOUND ELEVATION TO THE TOP BUILDING SEPARA TION: BUILDING SEPARATION SHALL BE A MINIMUM OF 10' OF THE STRUCTURE. UJ NOTE: SINCE THE FRONT FACADE IS EXEMPT FROM THE SETBACK PROVISION, THE BUILDING Ce HEIGHT IS WITHIN THE ALLOWED 35' HEIGHT REQUIREMENT WITHOUT ADDITIONAL SETBACKS. EXISTING/PROPOSED USE. PHASE H — EXISTING SITE VACANT, PHASE I' —PARTIALLY DEvcLOPED (EXISTING BANK) to PROPOSED USE. 45,600 SF COMMERCIAL/RETAIL BUILDING ON PHASE !l SUBDIVISION STREETS: CURB & GUTTER WATERSHED: THIS SITE IS NOT LOCATED IN A RESERVOIR WATERSHED. TOPO &SURVEY. TOPOGRAPHY AND BOUNDARY PROVIDED BY LICENSED LAND SUf"✓EYOR ROUDABUSH, GALE & ASSOCIATES, FIELD VERIFIED IN SEPTEMBER 2012. BENCHMARKS.• 1. BRICKNAIL AT THE SOUTHEAST CORNER OF THE DROP INLET (EL. 457.79) 2. PAINTED SQUARE LOCATED AT THE NORTHWEST CORNER OF THE DROP INLET (457.44). J. TOP OF SANITARY SEWER MANHOLE #4 (EL. 429.89) 4. SOUTHEAST CORNER OF CONCRETE SLAB AT PROPANE "ANK (EL. 424.27) DA TUM: ELEVATIONS ARE BASED ON NAD 83 DA TUM. EXISTING VEGETA TION: MOSTLY WOODED WITH PREVIOUSLY CLEARED AREAS CRI TICAL SLOPES. • CRITICAL SLOPE IMPACTS WERE PREVIOUSLY APPROVED WITH. THi: PHASE I DEVELOPMENT PLAN WITH THE APPROVAL OF SDP -2004-024 SDP -2004-045. THIS WAS APPROVED BY THE PLANNING COMMISSION ON OCTOBER 18TH, 2005 AND THE BOARD OF SUPERVISORS ON NOVEMBER 9, 2005. SEE THE CONDI 770N F OF APPROVAL FOR THE CIRI TI CAL SLOPE IMPACTS, LOCATED ON THIS COVER SHEET. FLOODPLAIN/WPO BUFFERS: THERE IS NO 100— YEAR FLOODPLAIN ON THIS SITE. THE 25' STREAM BUFFER IS SHOWN ON THE PLANS ACCESS. • THIS SI TE ACCESS FOR PHASE 11 IS FROM THE PRI VA TE TRA VEL WA Y THROUGH PHASE I OF THE DEVELOPMENT WHICH INTERSECTS ROUTE 29 .AT THE EXISTING STOP LIGHT. LIGHTING: THE SPILL OVER LIGHTING FROM PARKING AREA LUMINARIES ONTO PUBLIC ROADS AND PROPERTY IN RESIDENTIAL OR RURAL AREAS ZONING DISTRICTS SHALL NOT EXCEED ONE—HALF (1/2) FOOT CANDLE. EACH OUTDOOR L UM/NAIRE EQUIPPED WITH A LAMP THAT EMITS J,000 OR MORE INITIAL LUMENS SHALL BE A FULL CUTOFF LUMINAIRE AND SHALL BE ARRANGED OR SHIELDED TO REFLECT LIGHT AWAY FROM ADJOINING RESIDENTIAL DISTRICTS AND AWAY FROM ADJACENT ROADS THE SPILLOVER OF LIGHTING FROM LUMINAIRES ONTO PUBLIC ROADS AND PROPERTY IN RESIDENTIAL OR RURAL AREAS ZONING DISTRICTS SHALL NOT EXCEED ONE—HALF FOOTCANDLE, SEE THE LIGHTING PLAN FOR THE FINAL LIGHTING PLAN DESIGN AND LUMINAIRE SCHEDULE. RETAINING WALLS: REDI—ROCK RETAINING WALL DESIGNS HAVE BEEN INCLUDED WITH THIS SITE PLAN. THIS WALL SYSTEM IS PROPOSED ALONG THE EXISTING STREAM BUFFER AND ALONG THE PROPERTY BOUNDARY AS SHOW ON THE CONSTRUCTION PLANS MECHANICAL/ HVAC EQUIPMENT- ALL HVAC UNITS SHALL BE ROOF MOUNTED. MECHANICAL EQUIPMENT SHALL NOT BE VISIBLE FROAV THE ENTRANCE CORRIDOR. TRASH COLLECTION: DUMPSTER PROVIDED ON PLAN. ADJACENT PROPERTY OWNERS: SEE EXISTING CONDITIONS, SHEET 2. PHASING: PHASE IIA — (THIS PLAN) ONE (1) COMMERCIAL/RETAIL BUILDINa & PARKING AREA. PHASE IIB — FUTURE COMMERCIAL/RETAIL BUILDINGS AND PARKING ADDITIONAL UTILITIES. WATERLINE AND SANITARY SEWER CONNECTIONS SHALL BE EXTEYDED INTO THE PHASE lI PORTION OF THE SITE FOR THE PROPOSED DEVELOPMENT. ALL TIE—IN CONNECTIONS TO EXISTING UTILITIES ARE LOCATED ON—SITE. STORMWATER MANAGEMENT FACILITY- PROPOSED BIO—FILTER SHALL ACCOMMODATE STO?MWATER MANAGEMENT REQUIREMENTS. SEE WPO PLAN FOR THE STORMWATER MANAGEMENT DESIGN & SEE SHEET 8 FOR THE IMPERVIOUS AREA QUAN TI TIES. BUILDING SUMMARY BY PHASES.• PHASE I BUILDING SUMMARY RETAIL USE: 10, 250 SF FOOD USE. 5, 000 SF OFFICE USE: 65,650 SF PHASE H BUILDING SUMMARY.• RETAIL USE. 45,600 SF GROSS FLOOR AREA: 129,590 SF GROSS LEASABLE AREA: 103, 672 SF PARKING: PARKING REQUIREMENT FOR A SHOPPING CENTER = 4.75 SPACES PER 1000 GROSS LEASABLE AREA: TRA VEL WA Y PHASE I REQUIREMENTS. • 67,192 GLA REQUIRED SPACES. 320 SPACES PROVIDED SPACES: 322 SPACES PHASE l! REQUIREMENTS. • J6,480 GLA REQUIRED SPACES: 174 SPACES PROVIDED SPACES: 196 SPACES (NOTE: ADDITIONAL PARKING SPACES PROVIDED FOR FUTURE COMMERCIAL/RETAIL BUILDING) MAXIMUM EMPLOYEES: 30 EMPLOYEES AT ONE TIME (PHASE 11 RETAIL BUILDING) BUILDING SEPARA TION: BUILDING SEPARATION SHALL BE A MINIMUM OF 10' RIO MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA r r ,f/WSJ �\ f _7" \. ` } i i ! ° y ? I / l / 'f iF lillRRFr '',� SUBJECT SITE s �.. ,. ; , •, : � ' '} i � I DiN�CS �, ,.., �./ ,� f / - r..tf .,'^ 1 ,-�y.. / f �/ � � tl ' I 1 1 v,_ , •�•� i � ' i „ V A} I 1 1 i V �i i I �.� � •.. � � t � �� I 11 11 �.'•••• �j �, i � �I � 7 � � ii fi � � Iii i � i � � � ��t � � i � i i h 1 f li li i i i !1 i•i i• 1 1 � ;CiI i bllyL r '\ 1 i il-L�L "'rrr"i-'�-J_�_1-1-1-1_ LL_ � ' �,� �, I I '.'•� ! 1 � / i o i/ i`i i I / .........:.. ..\..a. 2 SHEET LAYOUT SCALE: 1" = 100' FIRST GOLD LEAF LAND TRUST P.O. BOX 1333 CHARLOTTESVILLE VA 22902 TOTAL PHASE IIA PAVED PARKING & VEHICULAR CIRCULATION AREA = 121,014 SF IMPERVIOUS AREAS. • PHASE l (EXISTING & FUTURE): BUILDING: J6,28 7 SF PA VED: 122,754 SF PHASE !!A: EXISTING CONDITIONS 3 BUILDING: 46,492 SF SIDEWALK. • 6,252 SF PARKING: 35,771 SF TRA VEL WA Y 85,243 SF PHASE IIB (FUTURE): STORMWATER MANAGEMENT PLAN EC --JA DITCH BUILDING: J3,041 SF PA VED: 76, 322 SF TOTAL (EXISTING, PROPOSED & FUTURE): BUILDING: 115,820 SF (1890) PA VED 326, 342 SF (509) OPEN: 212,414 SF (329) V200 p 2013-02 � s s w M FLA FIRE DEPARTMENT NOTES 1. CONSTRUCTION TYPE IS MASONRY NON—COMBUSTIBLE (ISO CLASS 4, IBC TYPE 11A). 2. KEY BOX IS REQUIRED BY THE FIRE DEPARTMENT. THE FIRE DEPARTMENT SHALL BE CONTACTED DURING CONSTRUCTION TO DETERMINE LOCATION. COLLINS ENGINEERING 200 GARRETT STREET, SUITE K. CHARLOTTESVILLE, VIRGINIA, 22902 PHONE: (434) 293-3719 VICINITY MAP SCALE: 1" = 2,000' Sheet List Table - SITE PLAN Shee`"fit-mber Sheet Title 1 COVER 2 EXISTING CONDITIONS 3 SITE & UTILITY PLAN 4 NOTES & DETAILS 5 LANDSCAPING PLAN 6 LIGHTING PLAN 7 UTILITY PROFILES & DETAILS TOTAL NUMBER OF SHEETS i Sheet List Table - WPO PLAN Sheet Number Sheet Title 1 COVER 2- GRADING & DRAINAGE PLAN 3 DRAINAGE MAP & CALCULATIONS 4 DRAINAGE PROFILES & CALCULATIONS 5 EROSION & SEDIMENT CONTROL NARRATIVE 5 EROSION & SEDIMENT CONTROL PHASE I PLAN 7 EROSION & SEDIMENT CONTROL PHASE II PLAN 8 EROSION & SEDIMENT CONTROL DETAILS 9 STORMWATER MANAGEMENT PLAN 9 TOTAL NUMBER OF SHEETS LEGEND ROADS DA` E C==------=----- EXIS77NG CULVERT # CUL VERT .. _ . .. .. Q DROP INLET & STRUCTURE NO. y ARB CURB DEPARTMENT OF FIRE RESCUE 200 CURB & GUTTER 240.55 VIRGINIA DEPARMENT OF TRANSPORTATION e/ . `.ROPOSED PA VEMENT TIB DENOTES TOP OF BOX — EC --JA DITCH i -�1 6" DEP7H OF EC -3A DITCH d N EC -2 DI TCH g" DEPTH OF EC -2 DITCH APPROVALS ALS DA` E DEPARTMENT OF COMM .JN3 OPMENT PLANNER/ZONING # ENGINEER .. _ . .. .. INSPECTIONS , y ARB zoo DEPARTMENT OF FIRE RESCUE 200 ALBEMARLE COUNTY SERVICE AUTHORITY 240.55 VIRGINIA DEPARMENT OF TRANSPORTATION e/ HEALTH DEPARTMENT 1 Regarding request "or modification of Sec wet 4.2 3 ttta ctio it mieal does$ T'he critical slopes waiver forNorthtown Cemerwas approved based on the finding that the suictapplication of ttu requirements of Sect on 4? would not forward the purposes, of the chapter that otherwise serve the public health, safety or welfare, or that alternatives proposed by the deve)operwouid satisfy those purposes at leasi to aneWivalent degree, snbjcst to the following conditions: Conmr Page 2 cf 4 tktoba?:6, 2nD5 1, in addition to all other erosion and sediment control measures that may be required by the Water Protection Ordinance, the applicant shall provide erosion and sediment coram measures to mum, to the wisfact" of the! Program Authority, that it is providing high luvoh ofeffWtivenass incontrolling sediment during construction. These measures stall incltxic; but not be limited to; a, A co ngmction schcduk that mttrimizes the duration of disturbance (e.g., phasing of the erosion and sediment control plan), b. Using higheffrciency sediment basins designed to include the use of flocculants. c: Matting exposed slaps as determined appropriate by theProgmm Authority. d, The contractor shall have a Responsible land Disturber ("Ri Vj, on the site throughoutthe period during which the site is under construction. The "RLD" shalt maintain a daily erasion and sediment control inspeamn log demonstrating 69 erosion and sediment control measures are being closely monitored and deficiencies are being quickly repaired, The" Ii'LW' shah assure that all control measrms arc being maintained in optimal condition, The log shall be made available for inspection by the Program Authority at any time during regular business bourn c. If determined to be necessary by the Program Authority, the sursxy required by Albrxnarle County Crake Section 17 247 shag include anamtwnt determined by the PrggnWAuftrity is be reasonably necessary w take corrective set on to repair or restore downstream proper tes damaged: during construction by narcffor sediment, 2. 1n addition to all *a storm water Management: requirements that may be required by the Water Protection Ordinance; 4. The stomwater managemem plan shall include additional measures deeerrrtirtcd by the program Arltority to be necessary in order to capture, to the maximwtt extent practical, the runoff from the site, both during and athx eonstruetion. b. The storrawater management plan shall include measuies to pmvent, to the fifflenextent, poSoble, damaging conditions to downstream properties and receiving waterways from occurring as a result of the development of the site, both daring and aft constructi+7tr. c, to o rder'&i 4%w the Program Authority to develop appmpriatg measures tg satispg p hs (4) and ib3 of this condition, the applicastt $Hadi submit data demonstrating the peak flow of runoff from the site and the peak flow of runoff coming onto the site. [Albemarle County Godes Sections :9-31, f 7-314(D)l 3. In the pian during construction the sequence of the storm water management adtir"=the switol int over of the stream flow, if any, 4, hoconjunction with the final site pbm,:strfeiewlandseapingandscreeningshalibcprovidcdtoscraen I adjatxrtt M14catiat properties dram Mas of disturbed educed $topes; and 3. All of the nt'lrersmtrdi8ons recommended by statt. SCOR. COLLINS'Z Lic. No. 035791 a o" & IONAL E��S z 0 a Ce U to W 0 z 0 U1 LU Ce Z z I � � LU 0 0 U U Z z 0 0 ILI LUi ce- 0� Z z caca Q a Ce Ce W w a a LU a U11 to LU w ! tY ce 1-4 M M M M W0�' o o 1-f00 0 .--f N M M W" N Z W V U) 1111 w Ulw 0 ZC/) W Lu JU' �w O N W la� UU w o EARTH DITCH a � DRIVEWAY CULVERT # BENCH MARK .. _ . .. .. CLEARING LIMITS �- VDOT STANDARD STOP SIGN zoo EXIS77NG CONTOUR 200 PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVA77ON e/ TBC DEN07E'S TOP/BACK OF CURB TIB DENOTES TOP OF BOX Regarding request "or modification of Sec wet 4.2 3 ttta ctio it mieal does$ T'he critical slopes waiver forNorthtown Cemerwas approved based on the finding that the suictapplication of ttu requirements of Sect on 4? would not forward the purposes, of the chapter that otherwise serve the public health, safety or welfare, or that alternatives proposed by the deve)operwouid satisfy those purposes at leasi to aneWivalent degree, snbjcst to the following conditions: Conmr Page 2 cf 4 tktoba?:6, 2nD5 1, in addition to all other erosion and sediment control measures that may be required by the Water Protection Ordinance, the applicant shall provide erosion and sediment coram measures to mum, to the wisfact" of the! Program Authority, that it is providing high luvoh ofeffWtivenass incontrolling sediment during construction. These measures stall incltxic; but not be limited to; a, A co ngmction schcduk that mttrimizes the duration of disturbance (e.g., phasing of the erosion and sediment control plan), b. Using higheffrciency sediment basins designed to include the use of flocculants. c: Matting exposed slaps as determined appropriate by theProgmm Authority. d, The contractor shall have a Responsible land Disturber ("Ri Vj, on the site throughoutthe period during which the site is under construction. The "RLD" shalt maintain a daily erasion and sediment control inspeamn log demonstrating 69 erosion and sediment control measures are being closely monitored and deficiencies are being quickly repaired, The" Ii'LW' shah assure that all control measrms arc being maintained in optimal condition, The log shall be made available for inspection by the Program Authority at any time during regular business bourn c. If determined to be necessary by the Program Authority, the sursxy required by Albrxnarle County Crake Section 17 247 shag include anamtwnt determined by the PrggnWAuftrity is be reasonably necessary w take corrective set on to repair or restore downstream proper tes damaged: during construction by narcffor sediment, 2. 1n addition to all *a storm water Management: requirements that may be required by the Water Protection Ordinance; 4. The stomwater managemem plan shall include additional measures deeerrrtirtcd by the program Arltority to be necessary in order to capture, to the maximwtt extent practical, the runoff from the site, both during and athx eonstruetion. b. The storrawater management plan shall include measuies to pmvent, to the fifflenextent, poSoble, damaging conditions to downstream properties and receiving waterways from occurring as a result of the development of the site, both daring and aft constructi+7tr. c, to o rder'&i 4%w the Program Authority to develop appmpriatg measures tg satispg p hs (4) and ib3 of this condition, the applicastt $Hadi submit data demonstrating the peak flow of runoff from the site and the peak flow of runoff coming onto the site. [Albemarle County Godes Sections :9-31, f 7-314(D)l 3. In the pian during construction the sequence of the storm water management adtir"=the switol int over of the stream flow, if any, 4, hoconjunction with the final site pbm,:strfeiewlandseapingandscreeningshalibcprovidcdtoscraen I adjatxrtt M14catiat properties dram Mas of disturbed educed $topes; and 3. All of the nt'lrersmtrdi8ons recommended by statt. SCOR. COLLINS'Z Lic. No. 035791 a o" & IONAL E��S z 0 a Ce U to W 0 z 0 U1 LU Ce Z z I � � LU 0 0 U U Z z 0 0 ILI LUi ce- 0� Z z caca Q a Ce Ce W w a a LU a U11 to LU w ! tY ce 1-4 M M M M W0�' o o 1-f00 0 .--f N M M W" N Z W V U) 1111 w Ulw 0 ZC/) W Lu JU' �w O N W la� UU w o i I I T'•' L o E o co Oz S Z_ c cr Y w o w m Z z w o U Z N J C J O U U la" E a � z m SCALE AS NOTED c o 3 of o U o LUy U C h O d t L t- i C I- o 3 O i -�1 X . d U I- d N i I I T'•' L o E o co Oz S Z_ c cr Y w o w m Z z w o U Z N J C J O U U la" JOB NO. E a � -a o _ O c SCALE AS NOTED a :6 3 of -D o LUy ao d N h O d t L t- i C I- Liz O i -�1 X . d U I- 2 , w �> o UJ o Ce = O U a to JOB NO. E 092029 -a o _ � SCALE AS NOTED o N 3 of SHEET NO. o ao d N h O d t L t- i O 0 a 'c LEGEND ROADS = 1 EXIS77NG CULVERT CUL VERT OSTB IiTTm DROP INLET & STRUCTURE NO. 3.04 CURB 00 100- CURB & GUTTER 3.09 ST PROPOSED PAVEMENT TEMPORARY SEDIMENT TRAP 77777777777= EC -3A DITCH � 6" 3.14 DEPTH OF EC -3A DITCH -.. . EC -2 DITCH 6" DEPTH OF EC -2 DITCH •••-,,, _ EARTH DITCH 3.05 DRI V FWA Y CULVERT + BENCH MARK _ _ _ _ _ CLEARING LIMITS VDOT STANDARD STOP SIGN - - - -200- - - - EXISTING CONTOUR 200 --- PROPOSED CONTOUR 240.55 PROPOSED SPOT ELEVA77ON TBC DENOTES TOP/BACK OF CURB TAB DENOTES TOP OF BOX EROSION CONTROL * VIRGINIA EROSION SPECIFICATIIONMCON 7ROL NUMBER HANDBOOK EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING. - 3.01 SAFETY FENCE.• A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 3.02 CONSTRUCTION ENTRANCE, A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE 774E AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 3.05 SILT FENCE, A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH 774E VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.07 STORM DRAIN INLET PROTECTION. A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.• A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 3.12 DIVERSION. A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPOR77NG EARTHEN RIDGE ON THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON-EROSIVE VELOCITIES APPLIES WHERE RUNOFF FROM AREAS OF HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE WITH THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, WHERE SURFACE AND/OR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENGTH NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS. 3.13 TEMPORARY SEDIMENT TRAP: A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION Wl7H A TEMPORARY DIVERSION DIKE. 3.14 TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMW47ER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE ANO APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. 318 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS. 3.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING TO PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFILTRATION, AND TOSTABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND G ETC., COVER THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VF , ARE SUCH 7HAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. 3.20 ROCK CHECK DAMS: SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRAC77CE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT AREAS OR THE DITCH ITSELF, MAINLY BY PONDING OF THE STORMW47ER RUNOFF. THIS PRACTICE, UTILIZING A COMBINATION OF STONE SIZES, IS LIMITED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS 3.31 TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING MIN APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF-S17F AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETA77ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION. THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS W A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIA7E PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. 3 35 MULCHING. - APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PR07EC77NG THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VE'GETA7ON BY INCREASING AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWING SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER WITH PLANTINGS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZATION BY THEMSELVES, CAN BE USED IN CONJUNCTION WITH TEMPORARY SEEDING. 3.37 TREES. SHRUBS VINES & GROUND COVERS.• STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA77VE COVER WITH TREES, SHRUBS, VINES, OR GROUND COVERS TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON STEEP OR ROCKY SLOPES WHERE MOWING IS NOT FEASIBLE, WHERE ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERVATION, OR TO ESTABLISH WILDLIFE HABITAT. 3.38 TREE PRESERVATION AND PROTECTION: PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING AC77W77ES. 3.39 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. EROSION CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETA77VE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC77CES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE ORGINIAVIRGINIA EROSION SEDIMENT SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING AC77WTY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS 774E FIRST STEP IN CLEARING. ES -4:A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTAT70N AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES -7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING AC77W77ES AND DURING S17E DEVELOPMENT UNTIL FINAL STABILIZA77ON IS ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIA TEL Y. Generral construction notes for Erosion and Sediment Control plans 1. The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement; of land disturbing activity, and one week prior to the final inspection., 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards, and specifications of the Virginia Erosion and Sediment Control Handbookand Virginia Regulations VR 625-02-00 Erosion and Sediment Control Regulations, 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion an6 sediment control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off-site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval by the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved, 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall' inspect all erasion control measures periodically and after each runoff - producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken tc an approved waste area. Earth till shall be inert materials only, free of roots, stumps, wood,: rubbish, andother debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13-301 of the Code of Albemarle. 14. Barrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:00pm; 15. Borrow, fill or waste activity shall' tie conducted in a safe manner than maintains lateral support, or order to minimize any hazard to persons physical damage to adjacent land and improvements, anddamage to any public street because o slides, sinking, or collapse. 16. The developer shall reservethe right to install naiinta.remava or convert to pernanen t stormwater management facilities where applicable all erosion control measures required by this plan, regardless of the sale of any lot, unit, building or other portion of the property. 17 Temporary shall be to 'seedin and mulching. Seeding gis to be at 35 lbs/acre, -anti in the months of September .to February to consist a 50150 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye., or May t t through August to consist. of German millet. Straw mulch is e be applied a 801bsi100sf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs/1000sf, incorporated into the top 4-6 inches of soil. Fertilizer shall be applied at 10001bs/acre and consist of a 10-20-10 nutrient mix. Permanent seeding shall be applied at 180lbsiacre and consist of 95% Kentucky 31 or Tall Fescue and. 0-5% Perennial Ry -.grass or Kentucky Bluegrass, Straw mulch is to be applied at 80lbs/100sf. Alternative; are subject to approved by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded,when necessary to achievc; a good stand of grass. Silt fence and diversion dykes which are collecting sediment to hsif their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no lunger needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordimace section 17-204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after> the date the land disturbing activity commenced. (Water Protection Ordinance section 17- 207B) TABLE 3.31-A LIMING REQUIREMENT'S FOR TElY"RARY SITES Recommended Application p14 Test of Agricultural Limestone below 42 3 tans per acro 4.2 to 5.2 2 tons per acre 5.2 to 6 1 too per acre Source: Va. DSVPC TABLE 3.31•B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS" Rate Sept, 1 - Feb. 15 50%50 Mix of Annual Ryegrass (Lolium multi-florum) & 50-100 Cereal (Winter) Rye Lve:. le cerwe') Feb. 16 - Apr. 30 Annual Ryegrass 60-100 (1,QUM multi-florum) May i - Aug 31 German Millet 50 (Setaria italics) Source: Va. DSWC WIAR�'�0�11%11201i•Fira-WA CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES. IT IS ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXIS77NG SEDIMENT BASINS, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL 774AT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON S17F AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS ]NESE AREAS SHALL BE SEEDED Wl77-1 FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. COM57RUC77ON ENTRANCE: A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 774E AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. SILT FENCE.• A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHE77C FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW-TO-MOOERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLA N77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION AC77VI77ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS 774AT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF S17E AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR 077-IER EROSION CONTROL MEASURES CAN BE ESTABLISHED. DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE KITH THE VESCH. TEMPORARY DIVERSION DIKE.• A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS OFF -97E RUNOFF AWAY FROM UNPROTECTED SLOPES AND TO A STABILIZED OUTLET, OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM EFFECTIVE LIVE /S 18 MONTHS ROCK CHECK DAMS, SMALL, TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF 774E SWALE OR DITCH. LIM17ED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS; SHOULD NOT BE USED IN LIVE STREAMS C STORM DRAIN INLET PR07EC770N: THE INSTALLA77ON OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INLETS OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA; LIM17ED TO DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL LARGE, CONCENTRATED STORMWA TER FLOWS TEMPORARY SEDIMENT TRAP. A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR RAI TO ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WI7H CONTROLLED STORMWi47ER RELEASE STRUCTURES WHICH IS FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. IT CAN BE CONSTRUCTED ONLY WHERE THERE /S SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PROFESSIONAL. OUTLET PROTECTION.- THE ROTECTION.THE INSTALLATION OF RIPRAP CHANNEL SECTIONS AND/OR STILLING BASINS BELOW STORM DRAIN OUTLETS TO REDUCE EROSION AND UNDER-CUT77VG FROM SCOURING AT OUTLETS AND TO REDUCE FLOW VELOCITIES BEFORE STORMW47FR ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS CULVERT INLET PROTECTION. A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SEDIMENT FROM ENTERING, ACCUMULA77NG IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVATIONS AND DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE. SAFETY FENCE, A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE. PERMANENT STABILIZAT701Y PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS PER THE PERMANENT STABILIZA77ON OF THIS EROSION & SEDIMENT CONTROL NARRA T/ VE. AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF THE FOLLOWING; TOPSOIL - 2" DEPTH, LIME - 2 TONS/ACRE, FERTILIZER - 600 LBS./ACRE OF 15-30-15 SEED - ERNST 5311 CONSERVA T70N SEED MIX - ERNMX-114 (45 LBS/ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACRE PARK KENTUCKY BLUEGRASS, 15 LBS./ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE PERENNIAL AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND MAINTAINED ON A REGULAR BASIS MAINTENANCE.• IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTEN77ON WILL BE GIVEN TO THE FOLLOWING ITEMS. A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. EROSION CONTROL NOTES & NARRATIVE PURPOSE.• THE PURPOSE OF THIS LAND DISTURBING AC77V1TY IS TO CONSTRUCT 774E PARKING LOT, DRIVE AISLES, DRAINAGE STRUCTURES, UTIL177ES & BUILDINGS FOR NOR774TOWN PHASE IIA. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS 8.95 ACRES EXISTING SITE CONDITIONS. THIS SITE CONSISTS OF AN OPEN GRASS FIELD WITH APPROXIMATE HALF OF THE SIDE LIGHTLY WOODED, SLOPING DOWNWARD TO THE NORTH. THE SITE IS LOCATED TO THE EAST OF ROUTE 29 AND DRAINS TO AN EXISTING CREEK ON-S17E. S ADJACENT AREAS. THIS SITE IS BORDERED TO THE EAST BY ROUTE 29. TO THE SOUTH AND EAST EXISTS SINGLE-FAMILY HOMES AND A RETAIL AREA. NORTHTOWN PHASE I EXISTS TO THE NORTH. OFFSITE LAND DISTURBANCE.• MINIMAL OFFSITE LAND DISTURBANCE IS PROPOSED ALONG ROUTE 29. ALL OTHER LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF DISTURBANCE AS SHOWN. CRITICAL AREAS.• CARE SHALL BE TAKEN TO PREVENT CONSTRUCTION RUNOFF FROM ENTERING THE EXIS77NG CREEK ON S1 TE. SOILS.- SOILS OILS.SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W17H SO/LS DATA INCLUDED WITH THIS NARRATIVE SEQUENCE OF CONSTRUCTION: 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEE77NG AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. J. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION ENTRANCES TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 4. INSTALL THE 1N177AL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS INCLUDES SILT FENCE, DIVERSION DIKES, SEDIMENT TRAPS AND SEDIMENT BASINS. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACT7V7TY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCTION ENTRANCE IS INSTALLED, INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE EROSION CONTROL PLAN. 6. ONCE ALL THE PHASE I EROSIONN INSTALLED A CONTROL MEMS HAVE BEE STALLS S SHOWN 0N THE EROSION CONTROL PHASE I PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIA TEL Y AFTER INSTALLATION. 7. ROUGH GRADE THE S17E TO THE CONTOURS SHOWN ON THE EROSION CONTROL PHASE 11 PLAN. 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS INA T MA Y NOT BE A TINA F L GRADE BUT WILL REMAIN DORMANTUNDISTURBED FOR LONGER THAN 30 DAYS. PERMANENT STABILIZA77ON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 9. GRADE OUT THE REMAINDER OF THE S17E AND GRADE THE ROADS AS SHOWN ON THE EROSION CONTROL PLAN. INSTALL STORM SEWER FOR THE PROJECT, USING INTERMEDIATE INLET PR07ECTION TO PR07ECT THE END OF THE PIPES. 10. FINE GRADE, INSTALL CURB & GUTTER AND SEED AND FER77LIZED THE DENUDED AREAS. INSTALL INLETS AND INSTALL INLET PR07EC77ON AS SHOWN ON THE PLANS. 11. INSTALL STONE BASE AND PAVE PARKING LOTS AND ROADS 12. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVES THE EROSION CONTROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. SEDIMENT BASIN 1 SHALL BE CONVERTED TO A BIO -FILTER AS SHOWN ON THE SWTW PLAN. 12. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL S17E STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED UNLESS OTHERWISE AUTHORIZED0 PROGRAM BY THE LOCAL RA R G M ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. SOIL DESCRIPTION 34C - GLENELG LOAM -77* TO 15% SLOPES, FINE -LOAMY. THIS VERY DEEP, WELL DRAINED SOIL IS FOUND IN CROP FIELDS. RUNOFF CLASS RANGES FROM LOW ON LEVEL SLOEPS TO VERY HIGH ON STEEP OR VERY STEEP SLOPES. 34D -- GLENELG LOAM 15% T ! P - 0 25 o SLOPES, FINE LOAMY. THIS VERY DEEP WELL DRAINED SOIL IS FOUND IN CROP FIELDS RUNOFF CLASS RANGES FROM LOW ON LEVEL SLOEPS TO VERY HIGH ON S7EEP OR VERY STEEP SLOPES TEMPORARY SEEDING: ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF 77ME SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELEC77ON OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES 77 -IAT WILL NOT BE BROUGHT TO FINAL GRADE WI THIN 30 DAYS PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE CONDITIONS FROM TABLES 3.31 B AND 3.31 C. NOTE THAT TABLE 3.31 B PRESENTS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE CONDITIONS; TABLE 3.31C PRESENTS MORE IN-DEPTH INFORMATION ON THE PLANT MATERIALS. TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO GERMINATE AND GROW. SEEDBED PREPARATION IS ESSENTIAL. AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR TEMPORARY SEEDING. TABLE 3.31A MAY BE USED TO DETERMINE THE ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RA TES.• FERTILIZER SHALL BE APPLIED AS 600 LBS/ACRE OF 10-20-10 (14 LBS/1, 000 SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST EFFECTIVE ON SANDY SOILS. THIS PRAC77CE OFTEN CAUSES UNDUE COMPAC77ON OF THE SOIL SURFACE, ESPECIALLY 1N CLAYEY SOILS, AND DOES NOT AID PLANT GROWTH AS EFFECTI VEL Y AS OTHER METHODS OF SURFACE ROUGHENING. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL, CUL77PACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 1J INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS, SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND LEGUMES SHOULD BE PLANTED FROM 4 INCH TO J DEEP. SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. J. J5, EXCEP T THA T H YDROMUL CHES (FIBER MUL CH) WILL NO T BE CONSIDERED ADEQUA IF. STRAW MULCH SHOULD BE USED DURING THESE PERIODS. AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION WILL BE RE -SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. STORMWATER RUN-OFF CONSIDERA TIONS• STORMWATER MANAGEMENT.• THE STORMWATER RUNOFF FROM 71 -IIS PROJECT DRAINS TEMPORARIL Y TO THE SEDIMENT BASIN. I T WILL UL 77MA TEL Y BE ROUTED TO THE STORMWATER MANAGEMENT FACILITY AT 77 -IE BACK OF THE SITE WITH THE EXTENSION OF THE STORM SEWER SYSTEM. A CONTRIBUTION TO THE PRO -RATA SHARE PROGRAM WILL ALSO BE MADE. f''TH 17 0L�,7 ��'' SCO R. COLLINS'� Lic. 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SCALE 2 D AS NOTED 10 - .N C U SHEET NO. o aw 5 �N 0 F3 * OSTB IiTTm STRAW BAIL BARRIER 3.04 se 00 100- TEMPORARY DIVERSION DIKE 3.09 ST ♦804M TEMPORARY SEDIMENT TRAP 3.13 OSB � SEDIMENT BASIN 3.14 aINLET 1 PROTEC77ON 3.07 &;* )E -X- SILT FENCE 3.05 CE c� CONSTRUCTION ENTRANCE 3.02 CD 00 CHECK DAM 3.20 EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING. - 3.01 SAFETY FENCE.• A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 3.02 CONSTRUCTION ENTRANCE, A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE 774E AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 3.05 SILT FENCE, A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH 774E VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.07 STORM DRAIN INLET PROTECTION. A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.• A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 3.12 DIVERSION. A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPOR77NG EARTHEN RIDGE ON THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON-EROSIVE VELOCITIES APPLIES WHERE RUNOFF FROM AREAS OF HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE WITH THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, WHERE SURFACE AND/OR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENGTH NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS. 3.13 TEMPORARY SEDIMENT TRAP: A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION Wl7H A TEMPORARY DIVERSION DIKE. 3.14 TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMW47ER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE ANO APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. 318 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS. 3.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING TO PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFILTRATION, AND TOSTABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND G ETC., COVER THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VF , ARE SUCH 7HAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. 3.20 ROCK CHECK DAMS: SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRAC77CE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT AREAS OR THE DITCH ITSELF, MAINLY BY PONDING OF THE STORMW47ER RUNOFF. THIS PRACTICE, UTILIZING A COMBINATION OF STONE SIZES, IS LIMITED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS 3.31 TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING MIN APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF-S17F AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETA77ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION. THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS W A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIA7E PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. 3 35 MULCHING. - APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PR07EC77NG THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VE'GETA7ON BY INCREASING AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWING SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER WITH PLANTINGS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZATION BY THEMSELVES, CAN BE USED IN CONJUNCTION WITH TEMPORARY SEEDING. 3.37 TREES. SHRUBS VINES & GROUND COVERS.• STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA77VE COVER WITH TREES, SHRUBS, VINES, OR GROUND COVERS TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON STEEP OR ROCKY SLOPES WHERE MOWING IS NOT FEASIBLE, WHERE ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERVATION, OR TO ESTABLISH WILDLIFE HABITAT. 3.38 TREE PRESERVATION AND PROTECTION: PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING AC77W77ES. 3.39 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. EROSION CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETA77VE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC77CES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE ORGINIAVIRGINIA EROSION SEDIMENT SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING AC77WTY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS 774E FIRST STEP IN CLEARING. ES -4:A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTAT70N AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES -7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING AC77W77ES AND DURING S17E DEVELOPMENT UNTIL FINAL STABILIZA77ON IS ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIA TEL Y. Generral construction notes for Erosion and Sediment Control plans 1. The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement; of land disturbing activity, and one week prior to the final inspection., 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards, and specifications of the Virginia Erosion and Sediment Control Handbookand Virginia Regulations VR 625-02-00 Erosion and Sediment Control Regulations, 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion an6 sediment control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off-site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval by the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved, 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall' inspect all erasion control measures periodically and after each runoff - producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken tc an approved waste area. Earth till shall be inert materials only, free of roots, stumps, wood,: rubbish, andother debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13-301 of the Code of Albemarle. 14. Barrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:00pm; 15. Borrow, fill or waste activity shall' tie conducted in a safe manner than maintains lateral support, or order to minimize any hazard to persons physical damage to adjacent land and improvements, anddamage to any public street because o slides, sinking, or collapse. 16. The developer shall reservethe right to install naiinta.remava or convert to pernanen t stormwater management facilities where applicable all erosion control measures required by this plan, regardless of the sale of any lot, unit, building or other portion of the property. 17 Temporary shall be to 'seedin and mulching. Seeding gis to be at 35 lbs/acre, -anti in the months of September .to February to consist a 50150 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye., or May t t through August to consist. of German millet. Straw mulch is e be applied a 801bsi100sf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs/1000sf, incorporated into the top 4-6 inches of soil. Fertilizer shall be applied at 10001bs/acre and consist of a 10-20-10 nutrient mix. Permanent seeding shall be applied at 180lbsiacre and consist of 95% Kentucky 31 or Tall Fescue and. 0-5% Perennial Ry -.grass or Kentucky Bluegrass, Straw mulch is to be applied at 80lbs/100sf. Alternative; are subject to approved by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded,when necessary to achievc; a good stand of grass. Silt fence and diversion dykes which are collecting sediment to hsif their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no lunger needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordimace section 17-204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after> the date the land disturbing activity commenced. (Water Protection Ordinance section 17- 207B) TABLE 3.31-A LIMING REQUIREMENT'S FOR TElY"RARY SITES Recommended Application p14 Test of Agricultural Limestone below 42 3 tans per acro 4.2 to 5.2 2 tons per acre 5.2 to 6 1 too per acre Source: Va. DSVPC TABLE 3.31•B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS" Rate Sept, 1 - Feb. 15 50%50 Mix of Annual Ryegrass (Lolium multi-florum) & 50-100 Cereal (Winter) Rye Lve:. le cerwe') Feb. 16 - Apr. 30 Annual Ryegrass 60-100 (1,QUM multi-florum) May i - Aug 31 German Millet 50 (Setaria italics) Source: Va. DSWC WIAR�'�0�11%11201i•Fira-WA CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES. IT IS ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXIS77NG SEDIMENT BASINS, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL 774AT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON S17F AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS ]NESE AREAS SHALL BE SEEDED Wl77-1 FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. COM57RUC77ON ENTRANCE: A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 774E AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. SILT FENCE.• A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHE77C FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW-TO-MOOERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLA N77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION AC77VI77ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS 774AT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF S17E AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR 077-IER EROSION CONTROL MEASURES CAN BE ESTABLISHED. DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE KITH THE VESCH. TEMPORARY DIVERSION DIKE.• A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS OFF -97E RUNOFF AWAY FROM UNPROTECTED SLOPES AND TO A STABILIZED OUTLET, OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM EFFECTIVE LIVE /S 18 MONTHS ROCK CHECK DAMS, SMALL, TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF 774E SWALE OR DITCH. LIM17ED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS; SHOULD NOT BE USED IN LIVE STREAMS C STORM DRAIN INLET PR07EC770N: THE INSTALLA77ON OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INLETS OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA; LIM17ED TO DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL LARGE, CONCENTRATED STORMWA TER FLOWS TEMPORARY SEDIMENT TRAP. A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR RAI TO ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WI7H CONTROLLED STORMWi47ER RELEASE STRUCTURES WHICH IS FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. IT CAN BE CONSTRUCTED ONLY WHERE THERE /S SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PROFESSIONAL. OUTLET PROTECTION.- THE ROTECTION.THE INSTALLATION OF RIPRAP CHANNEL SECTIONS AND/OR STILLING BASINS BELOW STORM DRAIN OUTLETS TO REDUCE EROSION AND UNDER-CUT77VG FROM SCOURING AT OUTLETS AND TO REDUCE FLOW VELOCITIES BEFORE STORMW47FR ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS CULVERT INLET PROTECTION. A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SEDIMENT FROM ENTERING, ACCUMULA77NG IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVATIONS AND DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE. SAFETY FENCE, A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE. PERMANENT STABILIZAT701Y PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS PER THE PERMANENT STABILIZA77ON OF THIS EROSION & SEDIMENT CONTROL NARRA T/ VE. AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF THE FOLLOWING; TOPSOIL - 2" DEPTH, LIME - 2 TONS/ACRE, FERTILIZER - 600 LBS./ACRE OF 15-30-15 SEED - ERNST 5311 CONSERVA T70N SEED MIX - ERNMX-114 (45 LBS/ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACRE PARK KENTUCKY BLUEGRASS, 15 LBS./ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE PERENNIAL AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND MAINTAINED ON A REGULAR BASIS MAINTENANCE.• IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTEN77ON WILL BE GIVEN TO THE FOLLOWING ITEMS. A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. EROSION CONTROL NOTES & NARRATIVE PURPOSE.• THE PURPOSE OF THIS LAND DISTURBING AC77V1TY IS TO CONSTRUCT 774E PARKING LOT, DRIVE AISLES, DRAINAGE STRUCTURES, UTIL177ES & BUILDINGS FOR NOR774TOWN PHASE IIA. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS 8.95 ACRES EXISTING SITE CONDITIONS. THIS SITE CONSISTS OF AN OPEN GRASS FIELD WITH APPROXIMATE HALF OF THE SIDE LIGHTLY WOODED, SLOPING DOWNWARD TO THE NORTH. THE SITE IS LOCATED TO THE EAST OF ROUTE 29 AND DRAINS TO AN EXISTING CREEK ON-S17E. S ADJACENT AREAS. THIS SITE IS BORDERED TO THE EAST BY ROUTE 29. TO THE SOUTH AND EAST EXISTS SINGLE-FAMILY HOMES AND A RETAIL AREA. NORTHTOWN PHASE I EXISTS TO THE NORTH. OFFSITE LAND DISTURBANCE.• MINIMAL OFFSITE LAND DISTURBANCE IS PROPOSED ALONG ROUTE 29. ALL OTHER LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF DISTURBANCE AS SHOWN. CRITICAL AREAS.• CARE SHALL BE TAKEN TO PREVENT CONSTRUCTION RUNOFF FROM ENTERING THE EXIS77NG CREEK ON S1 TE. SOILS.- SOILS OILS.SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W17H SO/LS DATA INCLUDED WITH THIS NARRATIVE SEQUENCE OF CONSTRUCTION: 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEE77NG AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. J. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION ENTRANCES TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 4. INSTALL THE 1N177AL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS INCLUDES SILT FENCE, DIVERSION DIKES, SEDIMENT TRAPS AND SEDIMENT BASINS. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACT7V7TY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCTION ENTRANCE IS INSTALLED, INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE EROSION CONTROL PLAN. 6. ONCE ALL THE PHASE I EROSIONN INSTALLED A CONTROL MEMS HAVE BEE STALLS S SHOWN 0N THE EROSION CONTROL PHASE I PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIA TEL Y AFTER INSTALLATION. 7. ROUGH GRADE THE S17E TO THE CONTOURS SHOWN ON THE EROSION CONTROL PHASE 11 PLAN. 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS INA T MA Y NOT BE A TINA F L GRADE BUT WILL REMAIN DORMANTUNDISTURBED FOR LONGER THAN 30 DAYS. PERMANENT STABILIZA77ON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 9. GRADE OUT THE REMAINDER OF THE S17E AND GRADE THE ROADS AS SHOWN ON THE EROSION CONTROL PLAN. INSTALL STORM SEWER FOR THE PROJECT, USING INTERMEDIATE INLET PR07ECTION TO PR07ECT THE END OF THE PIPES. 10. FINE GRADE, INSTALL CURB & GUTTER AND SEED AND FER77LIZED THE DENUDED AREAS. INSTALL INLETS AND INSTALL INLET PR07EC77ON AS SHOWN ON THE PLANS. 11. INSTALL STONE BASE AND PAVE PARKING LOTS AND ROADS 12. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVES THE EROSION CONTROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. SEDIMENT BASIN 1 SHALL BE CONVERTED TO A BIO -FILTER AS SHOWN ON THE SWTW PLAN. 12. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL S17E STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED UNLESS OTHERWISE AUTHORIZED0 PROGRAM BY THE LOCAL RA R G M ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. SOIL DESCRIPTION 34C - GLENELG LOAM -77* TO 15% SLOPES, FINE -LOAMY. THIS VERY DEEP, WELL DRAINED SOIL IS FOUND IN CROP FIELDS. RUNOFF CLASS RANGES FROM LOW ON LEVEL SLOEPS TO VERY HIGH ON STEEP OR VERY STEEP SLOPES. 34D -- GLENELG LOAM 15% T ! P - 0 25 o SLOPES, FINE LOAMY. THIS VERY DEEP WELL DRAINED SOIL IS FOUND IN CROP FIELDS RUNOFF CLASS RANGES FROM LOW ON LEVEL SLOEPS TO VERY HIGH ON S7EEP OR VERY STEEP SLOPES TEMPORARY SEEDING: ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF 77ME SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELEC77ON OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES 77 -IAT WILL NOT BE BROUGHT TO FINAL GRADE WI THIN 30 DAYS PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE CONDITIONS FROM TABLES 3.31 B AND 3.31 C. NOTE THAT TABLE 3.31 B PRESENTS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE CONDITIONS; TABLE 3.31C PRESENTS MORE IN-DEPTH INFORMATION ON THE PLANT MATERIALS. TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO GERMINATE AND GROW. SEEDBED PREPARATION IS ESSENTIAL. AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR TEMPORARY SEEDING. TABLE 3.31A MAY BE USED TO DETERMINE THE ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RA TES.• FERTILIZER SHALL BE APPLIED AS 600 LBS/ACRE OF 10-20-10 (14 LBS/1, 000 SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST EFFECTIVE ON SANDY SOILS. THIS PRAC77CE OFTEN CAUSES UNDUE COMPAC77ON OF THE SOIL SURFACE, ESPECIALLY 1N CLAYEY SOILS, AND DOES NOT AID PLANT GROWTH AS EFFECTI VEL Y AS OTHER METHODS OF SURFACE ROUGHENING. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL, CUL77PACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 1J INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS, SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND LEGUMES SHOULD BE PLANTED FROM 4 INCH TO J DEEP. SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. J. J5, EXCEP T THA T H YDROMUL CHES (FIBER MUL CH) WILL NO T BE CONSIDERED ADEQUA IF. STRAW MULCH SHOULD BE USED DURING THESE PERIODS. AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION WILL BE RE -SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. STORMWATER RUN-OFF CONSIDERA TIONS• STORMWATER MANAGEMENT.• THE STORMWATER RUNOFF FROM 71 -IIS PROJECT DRAINS TEMPORARIL Y TO THE SEDIMENT BASIN. I T WILL UL 77MA TEL Y BE ROUTED TO THE STORMWATER MANAGEMENT FACILITY AT 77 -IE BACK OF THE SITE WITH THE EXTENSION OF THE STORM SEWER SYSTEM. A CONTRIBUTION TO THE PRO -RATA SHARE PROGRAM WILL ALSO BE MADE. f''TH 17 0L�,7 ��'' SCO R. COLLINS'� Lic. 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SCALE 2 D AS NOTED 10 - .N C U SHEET NO. o aw 5 �N 0 F3 a �TEMPORARY FILL DIVERSION 3.10 0DV 00 100- DI VERSION 3.12 OPS PS !-_o---t PERMANENT SEEDING 3.32 0 TO TO TOPSOILING 3.30 0 1 CULVERT INLET PR07EC77ON 3.08 ODC DC DUST CONTROL 3.39 0 TSDI ---7 TEMPORARY SLOPE DRAIN 3.15 SA0 SAFETY FENCE 3.01 R 8, > TEMPORARY RIGHT-OF-WAY 3.11 DIVERSION EROSION & SEDIMENT CONTROL MEASURES: STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. STRUCTURAL PRACTICES USED IN THIS SECTION CONSIST OF THE FOLLOWING. - 3.01 SAFETY FENCE.• A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC. 3.02 CONSTRUCTION ENTRANCE, A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE 774E AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS 3.05 SILT FENCE, A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPORTING POSTS AND ENTRENCHED, TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH 774E VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). 3.07 STORM DRAIN INLET PROTECTION. A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA. INLET PR07EC77ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA. 3.09 TEMPORARY DIVERSION DIKE.• A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS AWAY FROM UNPR07ECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE. 3.12 DIVERSION. A CHANNEL CONSTRUCTED ACROSS A SLOPE WITH A SUPPOR77NG EARTHEN RIDGE ON THE LOWER SIDE. TO REDUCE SLOPE LENGTH AND TO INTERCEPT AND DIVERT STORMWATER RUNOFF TO STABILIZED OUTLETS AT NON-EROSIVE VELOCITIES APPLIES WHERE RUNOFF FROM AREAS OF HIGHER ELEVATION MAY DAMAGE PROPERTY, CAUSE EROSION, OR INTERFERE WITH THE ESTABLISHMENT OF VEGETATION ON LOWER AREAS, WHERE SURFACE AND/OR SHALLOW SUBSURFACE FLOW IS DAMAGING SLOPING UPLAND, AND WHERE THE SLOPE LENGTH NEEDS TO BE REDUCED TO MINIMIZE SOIL LOSS. 3.13 TEMPORARY SEDIMENT TRAP: A TEMPORARY PONDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG DRAINAGE AREA IS LESS THAN 3 ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CONJUNCTION Wl7H A TEMPORARY DIVERSION DIKE. 3.14 TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMW47ER RELEASE STRUCTURE FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE ANO APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT. 318 OUTLET PROTECTION: STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR AT STORMWATER OUTLETS TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF CONCENTRATED STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND ENGINEERED CHANNEL SECTIONS. 3.19 RIPRAP: A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE WITH FILTER FABRIC OR GRANULAR UNDERLINING TO PR07ECT THE SOIL FROM THE EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFILTRATION, AND TOSTABILIZE SLOPES WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND WATER INTERFACE AND G ETC., COVER THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VF , ARE SUCH 7HAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS. 3.20 ROCK CHECK DAMS: SMALL TEMPORARY STONE DAMS CONSTRUCTED ACROSS A SWALE OR DRAINAGE DITCH. TO REDUCE THE VELOCITY OF CONCENTRATED STORMWATER FLOWS, THEREBY REDUCING EROSION OF THE SWALE OR DITCH. THIS PRAC77CE ALSO TRAPS SEDIMENT GENERATED FROM ADJACENT AREAS OR THE DITCH ITSELF, MAINLY BY PONDING OF THE STORMW47ER RUNOFF. THIS PRACTICE, UTILIZING A COMBINATION OF STONE SIZES, IS LIMITED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS 3.31 TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING MIN APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF-S17F AREAS, AND TO PROVIDE PR07EC77ON TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETA77ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED. 3.32 PERMANENT STABILIZATION. THE ESTABLISHMENT OF PERENNIAL VEGETA77VE COVER ON DISTURBED AREAS BY PLAN77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS W A MANNER THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIA7E PLANT MATERIALS TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. 3 35 MULCHING. - APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE SOIL SURFACE. TO PREVENT EROSION BY PR07EC77NG THE SOIL SURFACE FROM RAINDROP IMPACT AND REDUCING THE VELOCITY OF OVERLAND FLOW. TO FOSTER THE GROWTH OF VE'GETA7ON BY INCREASING AVAILABLE MOISTURE AND PROVIDING INSULATION AGAINST EXTREME HEAT AND COLD. AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWING SEEDING. AREAS WHICH CANNOT BE SEEDED BECAUSE OF THE SEASON SHOULD BE MULCHED USING ORGANIC MULCH. MULCH MAY BE USED TOGETHER WITH PLANTINGS OF TREES, SHRUBS, OR CERTAIN GROUND COVERS WHICH DO NOT PROVIDE ADEQUATE SOIL STABILIZATION BY THEMSELVES, CAN BE USED IN CONJUNCTION WITH TEMPORARY SEEDING. 3.37 TREES. SHRUBS VINES & GROUND COVERS.• STABILIZING DISTURBED AREAS BY ESTABLISHING VEGETA77VE COVER WITH TREES, SHRUBS, VINES, OR GROUND COVERS TO AID IN STABILIZING SOIL IN AREAS WHERE VEGETATION OVER THAN TURF IS PREFERRED, TO PROVIDE FOOD AND SHELTER FOR WILDLIFE WHERE WILDLIFE HABITAT IS DESIRABLE. APPLIES IN AREAS WHERE TURF ESTABLISHMENT IS DIFFICULT, ON STEEP OR ROCKY SLOPES WHERE MOWING IS NOT FEASIBLE, WHERE ORNAMENTALS ARE DESIRABLE FOR LANDSCAPING PURPOSES, AND WHERE WOODY PLANTS ARE DESIRABLE FOR SOIL CONSERVATION, OR TO ESTABLISH WILDLIFE HABITAT. 3.38 TREE PRESERVATION AND PROTECTION: PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE TREES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL, WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLUTION CONTROL, NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM FOREST TO URBAN -TYPE USES APPLIES IN TREE -INHABITED AREAS SUBJECT TO LAND DISTURBING AC77W77ES. 3.39 DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE WITH THE VESCH. EROSION CONTROL NOTES ES -1: UNLESS OTHERWISE INDICATED, ALL VEGETA77VE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC77CES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE ORGINIAVIRGINIA EROSION SEDIMENT SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS. ES -2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING AC77WTY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES -3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS 774E FIRST STEP IN CLEARING. ES -4:A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL TIMES ES -5: PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF-SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY. ES -6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLA77ON OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTAT70N AS DETERMINED BY THE PLAN APPROVING AUTHORITY. ES -7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND DISTURBING AC77W77ES AND DURING S17E DEVELOPMENT UNTIL FINAL STABILIZA77ON IS ACHIEVED. ES -8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED WATER FILTERING DEVICE. ES -9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIA TEL Y. Generral construction notes for Erosion and Sediment Control plans 1. The plan approving authority must be notified one week prior to the pre -construction conference, one week prior to the commencement; of land disturbing activity, and one week prior to the final inspection., 2. All erosion and sediment control measures will be constructed and maintained according to minimum standards, and specifications of the Virginia Erosion and Sediment Control Handbookand Virginia Regulations VR 625-02-00 Erosion and Sediment Control Regulations, 3. All erosion and sediment control measures are to be placed prior to or as the first step in clearing. 4. A copy of the approved erosion an6 sediment control plan shall be maintained on the site at all times. 5. Prior to commencing land disturbing activities in areas other than indicated on these plans (including, but not limited to, off-site borrow or waste areas), the contractor shall submit a supplementary erosion control plan to the owner for review and approval by the plan approving authority. 6. The contractor is responsible for installation of any additional erosion control measures necessary to prevent erosion and sedimentation as determined by the plan approving authority. 7. All disturbed areas are to drain to approved sediment control measures at all times during land disturbing activities and during site development until final stabilization is achieved, 8. During dewatering operations, water will be pumped into an approved filtering device. 9. The contractor shall' inspect all erasion control measures periodically and after each runoff - producing rainfall event. Any necessary repairs or cleanup to maintain the effectiveness of the erosion control devices shall be made immediately. 10. All fill material to be taken from an approved, designated borrow area. 11. All waste materials shall be taken tc an approved waste area. Earth till shall be inert materials only, free of roots, stumps, wood,: rubbish, andother debris. 12. Borrow or waste areas are to be reclaimed within 7 days of completion per Zoning Ordinance section 5.1.28. 13. All inert materials shall be transported in compliance with section 13-301 of the Code of Albemarle. 14. Barrow, fill or waste activity involving industrial -type power equipment shall be limited to the hours of 7:00am to 9:00pm; 15. Borrow, fill or waste activity shall' tie conducted in a safe manner than maintains lateral support, or order to minimize any hazard to persons physical damage to adjacent land and improvements, anddamage to any public street because o slides, sinking, or collapse. 16. The developer shall reservethe right to install naiinta.remava or convert to pernanen t stormwater management facilities where applicable all erosion control measures required by this plan, regardless of the sale of any lot, unit, building or other portion of the property. 17 Temporary shall be to 'seedin and mulching. Seeding gis to be at 35 lbs/acre, -anti in the months of September .to February to consist a 50150 mix of Annual Ryegrass and Cereal Winter Rye, or in March and April to consist of Annual Rye., or May t t through August to consist. of German millet. Straw mulch is e be applied a 801bsi100sf. Alternatives are subject to approved by the County erosion control inspector. 18. Permanent stabilization shall be lime and fertilizer, permanent seeding, and mulch. Agricultural grade limestone shall be applied at 90lbs/1000sf, incorporated into the top 4-6 inches of soil. Fertilizer shall be applied at 10001bs/acre and consist of a 10-20-10 nutrient mix. Permanent seeding shall be applied at 180lbsiacre and consist of 95% Kentucky 31 or Tall Fescue and. 0-5% Perennial Ry -.grass or Kentucky Bluegrass, Straw mulch is to be applied at 80lbs/100sf. Alternative; are subject to approved by the County erosion control inspector. 19. Maintenance: All measures are to be inspected weekly and after each rainfall. Any damage or clogging to structural measures is to be repair immediately. Silt traps are to be cleaned when 50% of the wet storage volume is filled with sediment. All seeded areas are to be reseeded,when necessary to achievc; a good stand of grass. Silt fence and diversion dykes which are collecting sediment to hsif their height must be cleaned and repaired immediately. 20. All temporary erosion and sediment control measures are to be removed within 30 days of final site stabilization, when measures are no lunger needed, subject to approval by the County erosion control inspector. 21. This plan shall be void if the owner does not obtain a permit within 1 year of the date of approval. (Water Protection Ordimace section 17-204G.) 22. Permanent vegetation shall be installed on all denuded areas within nine (9) months after> the date the land disturbing activity commenced. (Water Protection Ordinance section 17- 207B) TABLE 3.31-A LIMING REQUIREMENT'S FOR TElY"RARY SITES Recommended Application p14 Test of Agricultural Limestone below 42 3 tans per acro 4.2 to 5.2 2 tons per acre 5.2 to 6 1 too per acre Source: Va. DSVPC TABLE 3.31•B ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS "QUICK REFERENCE FOR ALL REGIONS" Rate Sept, 1 - Feb. 15 50%50 Mix of Annual Ryegrass (Lolium multi-florum) & 50-100 Cereal (Winter) Rye Lve:. le cerwe') Feb. 16 - Apr. 30 Annual Ryegrass 60-100 (1,QUM multi-florum) May i - Aug 31 German Millet 50 (Setaria italics) Source: Va. DSWC WIAR�'�0�11%11201i•Fira-WA CONTROL MEASURES: EROSION AND SEDIMENT CONTROL MEASURES. IT IS ANTICIPATED TO USE CONSTRUCTION ENTRANCES, DIVERSION DIKES, EXIS77NG SEDIMENT BASINS, AND SILT FENCES WILL BE INSTALLED TO CONTROL SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND DISTURBANCE ACTIVITIES TEMPORARY STOCKPILE AREAS WILL BE MAINTAINED FROM TOPSOIL 774AT WILL BE STRIPPED FROM AREAS TO BE GRADED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON S17F AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA77VE COVER. PERMANENT SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN DAYS ]NESE AREAS SHALL BE SEEDED Wl77-1 FAST GERMINATING VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. COM57RUC77ON ENTRANCE: A STABILIZED PAVED CONSTRUCTION ENTRANCE WITH A WASH RACK LOCATED AT POINTS OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 774E AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS. SILT FENCE.• A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHE77C FILTER FABRIC STRETCHED ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED. TO INTERCEPT AND DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION OPERATIONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE. TO DECREASE THE VELOCITY OF SHEET FLOWS AND LOW-TO-MOOERA7E LEVEL CHANNEL FLOWS THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH). PERMANENT STABILIZATION: THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLA N77NG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE TO S17E CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION AC77VI77ES, ALL AREAS WILL RECEIVE A PERMANENT VEGETA77VE COVER. TEMPORARY SEEDING.• THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND SEDIMENTATION BY STABILIZING DISTURBED AREAS 774AT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF S17E AREAS, AND TO PROVIDE PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UNTIL PERMANENT VEGETATION OR 077-IER EROSION CONTROL MEASURES CAN BE ESTABLISHED. DUST CONTROL: REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOLITION AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN ACCORDANCE KITH THE VESCH. TEMPORARY DIVERSION DIKE.• A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS OFF -97E RUNOFF AWAY FROM UNPROTECTED SLOPES AND TO A STABILIZED OUTLET, OR TO DIVERT SEDIMENT -LADEN RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM EFFECTIVE LIVE /S 18 MONTHS ROCK CHECK DAMS, SMALL, TEMPORARY STONE DAMS CONSTRUCTED ACROSS A DRAINAGE DITCH TO REDUCE THE VELOCITY OF CONCENTRATED FLOWS, REDUCING EROSION OF 774E SWALE OR DITCH. LIM17ED TO USE IN SMALL OPEN CHANNELS WHICH DRAIN 10 ACRES OR LESS; SHOULD NOT BE USED IN LIVE STREAMS C STORM DRAIN INLET PR07EC770N: THE INSTALLA77ON OF VARIOUS KINDS OF SEDIMENT TRAPPING MEASURES AROUND DROP INLETS OR CURB INLET STRUCTURES PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA; LIM17ED TO DRAINAGE AREAS NOT EXCEEDING ONE ACRE, AND NOT INTENDED TO CONTROL LARGE, CONCENTRATED STORMWA TER FLOWS TEMPORARY SEDIMENT TRAP. A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR RAI TO ENOUGH 77ME TO ALLOW MOST TO THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE LIFE IS 18 MONTHS. TEMPORARY SEDIMENT BASIN. A TEMPORARY BARRIER OR DAM WI7H CONTROLLED STORMWi47ER RELEASE STRUCTURES WHICH IS FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A DRAINAGEWAY. IT IS USED TO DETAIN SEDIMENT -LADEN RUNOFF FROM DRAINAGE AREAS 3 ACRES OR GREATER FOR ENOUGH 77ME TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. IT CAN BE CONSTRUCTED ONLY WHERE THERE /S SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY MAXIMUM EFFEC77VE LIFE IS 18 MONTHS UNLESS DESIGNED AS A PERMANENT POND BY A QUALIFIED PROFESSIONAL. OUTLET PROTECTION.- THE ROTECTION.THE INSTALLATION OF RIPRAP CHANNEL SECTIONS AND/OR STILLING BASINS BELOW STORM DRAIN OUTLETS TO REDUCE EROSION AND UNDER-CUT77VG FROM SCOURING AT OUTLETS AND TO REDUCE FLOW VELOCITIES BEFORE STORMW47FR ENTERS RECEIVING CHANNELS BELOW THESE OUTLETS CULVERT INLET PROTECTION. A SEDIMENT FILTER LOCATED AT THE INLET TO STORM SEWER CULVERTS WHICH PREVENTS SEDIMENT FROM ENTERING, ACCUMULA77NG IN AND BEING TRANSFERRED BY THE CULVERT. IT ALSO PROVIDES EROSION CONTROL AT CULVERTS DURING THE PHASE OF A PROJECT WHERE ELEVATIONS AND DRAINAGE PATTERNS ARE CHANGING, CAUSING ORIGINAL CONTROL MEASURES TO BE INEFFECTIVE. SAFETY FENCE, A PR07EC77VE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF AN EROSION CONTROL MEASURE. PERMANENT STABILIZAT701Y PERMANENT SEEDING WILL BE APPLIED TO ALL DISTURBED AREAS AS PER THE PERMANENT STABILIZA77ON OF THIS EROSION & SEDIMENT CONTROL NARRA T/ VE. AFTER CONSTRUCTION IS COMPLETED, ALL DISTURBED AREAS OF THE SITE WILL BE LIMED, FERTILIZED, AND SEEDED AS PER CURRENT VDOT STANDARDS. THIS SHALL CONSIST OF THE FOLLOWING; TOPSOIL - 2" DEPTH, LIME - 2 TONS/ACRE, FERTILIZER - 600 LBS./ACRE OF 15-30-15 SEED - ERNST 5311 CONSERVA T70N SEED MIX - ERNMX-114 (45 LBS/ACRE PENNLAWN CREEPING RED FESCUE, 37.5 LBS/ACRE ARGILS KENTUCKY BLUEGRASS, 37.5 LBS/ACRE PARK KENTUCKY BLUEGRASS, 15 LBS./ACRE ANNUAL RYEGRASS & 15 LBS/ACRE PLEASURE PERENNIAL AFTER THESE AREAS ARE STABILIZED, THEY WILL BE MOWED AND MAINTAINED ON A REGULAR BASIS MAINTENANCE.• IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAINFALL. SPECIFIC ATTEN77ON WILL BE GIVEN TO THE FOLLOWING ITEMS. A. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK. B. ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL BE REPLACED. C. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER. D. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED. EROSION CONTROL NOTES & NARRATIVE PURPOSE.• THE PURPOSE OF THIS LAND DISTURBING AC77V1TY IS TO CONSTRUCT 774E PARKING LOT, DRIVE AISLES, DRAINAGE STRUCTURES, UTIL177ES & BUILDINGS FOR NOR774TOWN PHASE IIA. THE TOTAL AREA TO BE DISTURBED WITH THIS PHASE OF DEVELOPMENT IS 8.95 ACRES EXISTING SITE CONDITIONS. THIS SITE CONSISTS OF AN OPEN GRASS FIELD WITH APPROXIMATE HALF OF THE SIDE LIGHTLY WOODED, SLOPING DOWNWARD TO THE NORTH. THE SITE IS LOCATED TO THE EAST OF ROUTE 29 AND DRAINS TO AN EXISTING CREEK ON-S17E. S ADJACENT AREAS. THIS SITE IS BORDERED TO THE EAST BY ROUTE 29. TO THE SOUTH AND EAST EXISTS SINGLE-FAMILY HOMES AND A RETAIL AREA. NORTHTOWN PHASE I EXISTS TO THE NORTH. OFFSITE LAND DISTURBANCE.• MINIMAL OFFSITE LAND DISTURBANCE IS PROPOSED ALONG ROUTE 29. ALL OTHER LAND DISTURBANCE IS TO OCCUR WITHIN THE LIMITS OF DISTURBANCE AS SHOWN. CRITICAL AREAS.• CARE SHALL BE TAKEN TO PREVENT CONSTRUCTION RUNOFF FROM ENTERING THE EXIS77NG CREEK ON S1 TE. SOILS.- SOILS OILS.SOILS MAP IS INCORPORATED INTO THE EROSION CONTROL PLANS W17H SO/LS DATA INCLUDED WITH THIS NARRATIVE SEQUENCE OF CONSTRUCTION: 1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE- CONS 7RUC 77ON MEE77NG AS REQUIRED. 2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE APPROVAL FROM THE INSPECTOR ON THE PROJECT. J. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH AREA AS SHOWN ON THE PLANS. CONSTRUCTION ENTRANCES TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. 4. INSTALL THE 1N177AL CONSTRUCTION MEASURES AS SHOWN ON THE EROSION CONTROL SHEET. THIS INCLUDES SILT FENCE, DIVERSION DIKES, SEDIMENT TRAPS AND SEDIMENT BASINS. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE ACT7V7TY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE. 5. IN ADD177ON TO ENSURING THAT THE PAVED CONSTRUCTION ENTRANCE IS INSTALLED, INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE EROSION CONTROL PLAN. 6. ONCE ALL THE PHASE I EROSIONN INSTALLED A CONTROL MEMS HAVE BEE STALLS S SHOWN 0N THE EROSION CONTROL PHASE I PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR CAN BEGIN GRADING OPERATIONS. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES, AND DIVERSIONS IMMEDIA TEL Y AFTER INSTALLATION. 7. ROUGH GRADE THE S17E TO THE CONTOURS SHOWN ON THE EROSION CONTROL PHASE 11 PLAN. 8. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS INA T MA Y NOT BE A TINA F L GRADE BUT WILL REMAIN DORMANTUNDISTURBED FOR LONGER THAN 30 DAYS. PERMANENT STABILIZA77ON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR. 9. GRADE OUT THE REMAINDER OF THE S17E AND GRADE THE ROADS AS SHOWN ON THE EROSION CONTROL PLAN. INSTALL STORM SEWER FOR THE PROJECT, USING INTERMEDIATE INLET PR07ECTION TO PR07ECT THE END OF THE PIPES. 10. FINE GRADE, INSTALL CURB & GUTTER AND SEED AND FER77LIZED THE DENUDED AREAS. INSTALL INLETS AND INSTALL INLET PR07EC77ON AS SHOWN ON THE PLANS. 11. INSTALL STONE BASE AND PAVE PARKING LOTS AND ROADS 12. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN REMOVES THE EROSION CONTROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES PERMISSION. SEDIMENT BASIN 1 SHALL BE CONVERTED TO A BIO -FILTER AS SHOWN ON THE SWTW PLAN. 12. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK. 13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL S17E STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED UNLESS OTHERWISE AUTHORIZED0 PROGRAM BY THE LOCAL RA R G M ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. SOIL DESCRIPTION 34C - GLENELG LOAM -77* TO 15% SLOPES, FINE -LOAMY. THIS VERY DEEP, WELL DRAINED SOIL IS FOUND IN CROP FIELDS. RUNOFF CLASS RANGES FROM LOW ON LEVEL SLOEPS TO VERY HIGH ON STEEP OR VERY STEEP SLOPES. 34D -- GLENELG LOAM 15% T ! P - 0 25 o SLOPES, FINE LOAMY. THIS VERY DEEP WELL DRAINED SOIL IS FOUND IN CROP FIELDS RUNOFF CLASS RANGES FROM LOW ON LEVEL SLOEPS TO VERY HIGH ON S7EEP OR VERY STEEP SLOPES TEMPORARY SEEDING: ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR EXTENDED PERIODS OF 77ME SHALL BE SEEDED WITH FAST GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELEC77ON OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR AND WILL BE APPLIED TO DISTURBED ARES 77 -IAT WILL NOT BE BROUGHT TO FINAL GRADE WI THIN 30 DAYS PLANTS SHOULD BE SELECTED APPROPRIATE TO THE SEASON AND SITE CONDITIONS FROM TABLES 3.31 B AND 3.31 C. NOTE THAT TABLE 3.31 B PRESENTS PLANTS WHICH CAN BE USED WITHOUT EXTENSIVE EVALUATION OF SITE CONDITIONS; TABLE 3.31C PRESENTS MORE IN-DEPTH INFORMATION ON THE PLANT MATERIALS. TO CONTROL EROSION ON BARE SOIL SURFACES, PLANTS MUST BE ABLE TO GERMINATE AND GROW. SEEDBED PREPARATION IS ESSENTIAL. AN EVALUATION SHOULD BE CONDUCTED TO DETERMINE IF LIME IS NECESSARY FOR TEMPORARY SEEDING. TABLE 3.31A MAY BE USED TO DETERMINE THE ACTUAL NEED ALONG WITH SUGGESTED APPLICATION RA TES.• FERTILIZER SHALL BE APPLIED AS 600 LBS/ACRE OF 10-20-10 (14 LBS/1, 000 SQ. FT.) OR EQUIVALENT NUTRIENTS. LIME AND FERTILIZER SHALL BE INCORPORATED INTO THE TOP 2 TO 4 INCHES OF THE SOIL IF POSSIBLE. IF THE AREA HAS BEEN RECENTLY LOOSENED OR DISTURBED, NO FURTHER ROUGHENING IS REQUIRED. WHEN THE AREA IS COMPACTED, CRUSTED, OR HARDENED, THE SOIL SHALL BE LOOSENED BY DISCING, RAKING, HARROWING, OR OTHER ACCEPTABLE MEANS TRACKING WITH BULLDOZER CLEATS IS MOST EFFECTIVE ON SANDY SOILS. THIS PRAC77CE OFTEN CAUSES UNDUE COMPAC77ON OF THE SOIL SURFACE, ESPECIALLY 1N CLAYEY SOILS, AND DOES NOT AID PLANT GROWTH AS EFFECTI VEL Y AS OTHER METHODS OF SURFACE ROUGHENING. SEED SHALL BE EVENLY APPLIED WITH A BROADCAST SEEDER, DRILL, CUL77PACKER SEEDER OR HYDROSEEDER. SMALL GRAINS SHALL BE PLANTED NO MORE THAN 1J INCHES DEEP. SMALL SEEDS, SUCH AS KENTUCKY BLUEGRASS, SHOULD BE PLANTED NO MORE THAN 4 INCH DEEP. OTHER GRASSES AND LEGUMES SHOULD BE PLANTED FROM 4 INCH TO J DEEP. SEEDINGS MADE IN FALL FOR WINTER COVER AND DURING HOT AND DRY SUMMER MONTHS SHALL BE MULCHED ACCORDING TO MULCHING, STD. & SPEC. J. J5, EXCEP T THA T H YDROMUL CHES (FIBER MUL CH) WILL NO T BE CONSIDERED ADEQUA IF. STRAW MULCH SHOULD BE USED DURING THESE PERIODS. AREAS WHICH FAIL TO ESTABLISH VEGETATIVE COVER ADEQUATE TO PREVENT RILL EROSION WILL BE RE -SEEDED AS SOON AS SUCH AREAS ARE IDENTIFIED. STORMWATER RUN-OFF CONSIDERA TIONS• STORMWATER MANAGEMENT.• THE STORMWATER RUNOFF FROM 71 -IIS PROJECT DRAINS TEMPORARIL Y TO THE SEDIMENT BASIN. I T WILL UL 77MA TEL Y BE ROUTED TO THE STORMWATER MANAGEMENT FACILITY AT 77 -IE BACK OF THE SITE WITH THE EXTENSION OF THE STORM SEWER SYSTEM. A CONTRIBUTION TO THE PRO -RATA SHARE PROGRAM WILL ALSO BE MADE. f''TH 17 0L�,7 ��'' SCO R. COLLINS'� Lic. No. 03579141 kIS �lj�(13,�,4SIONAL EIC$t Z O E a U to LU 0 t_n Ce U) Z W 0 H 0 U) P4 W ce ZJ O Q aE. W ca � � w Z Z g O Z a- cn w CC Z F- Z f E O o U U O O U U J J Ce Ce M E m m Q Ce Ce UJ n � U) w w Q� C� M M M M U, H O N .1 in - � � r -I N M M 0) T_ 1%_ M M N a 'tI WN 0) N Q W J J_ W 0 L. U I ` V Ul t U) W W H IF- F- oW fy_ 0 O O I� 0 1L 0 w CL t3: _ 1 9 a l-1 z ~ J W 0 n f.L�. 0 (1)Q o Z75 a = 0C C O CL U 1 Z a W W C �Z 1 G oZ W F"I Z Z 0 - Z W0 W aZ Z U O 0 O U Z Z L N C O C C O U 3: n :t F__40 w () V o; a 0 o y OW I- N X U a � WO C NL 0 6 7V C O 3 Ce (7 O+ O Z C of Y W O Z Z Z Z •O W U L Z y J J C O° U O 1a Q) C a a 0 C a1E3 Q) v LU > n J D c y`` F_ U O E.-1 V x O V d J w H O w C LL] 00 2 = o �. to 0 .O JOB NO. E 092029 �E O �. SCALE 2 D AS NOTED 10 - .N C U SHEET NO. o aw 5 �N 0 F3 _M1, .1% "t" %, ` � k 1111�1 %, _zV 511, \ :rl�l 'IV 0011"t E , % % �� el ,, I - , 0 6 j �, 1% % - i k -A I I t %5 -, I.' , �&: ft- .. .�, % - . .. '11 1% __ ��,��4, .. 1k, ",i;x .1 ::1 11 . `�_- I I N, '._. � �' "-7% gn, �­ \ I "I " .1.: ,,i / / t4l It% 1"�.. I - 11" I A �' I ,; TMP45C-1-P-12 -6k, 1%_ J-1 V I . ili� " ." \ t � "�. "�'��111_�11 ", __101_�'�� 1% , I . /� % �,-- �� '% , f�. TMP45C-1-P-11 ilk. \ 001- �j r - 'NIN ', I` �% , , o, 'Uf 1= .--/,\,.\ e N/F BANCROFT ZONE: R2 `1�11 , �' '1� z \,\\\,\, f/ TM P 45C- I -P- 1 0 USE: SFD \ ,III Y ZONE: R2 \X " � " \ "-,;Z- 1 N/F DOLZER / / #2923 *, \ tl,w pmm�,mlmur I-- USE: SFD TMP 45C-1-04� NOTES: 00- , ,� � \ K�441! 'w " �_M TMP45C-1-P-9 \ -,',,, ZONE- R2 #2925 DB 1005 PG 344 N/F HAMILTOik 1. THERE IS 4.54 AC. OF TREE CLEARING ASSOCIATED WITH Tl� 11 `11 ftftl - � ,� ,-,, , ; wowoo 0--1,, ",,­ )� - ., ,/i "": 01w I/ USE: SFD 4z� * .... . .... 4, � -11-1000 Ix / )'7 j - ZONE: R2 .. THIS PROJECT. THE TOTAL LIMITS OF DISTURBANCE IS 8.95 AC. "kt., ,_5,,-,--1*D1 ,� Tl;/) 1`;aW � � N/F EMSWILER DB 1006 PG 681 - -1 . . 4��.�� I __ "T * NN ._1 -_� � I 10011 tz�l ZONE: R2 I ", , #2927 / / -, _­­ ,_­__, _____,_ ____ � USE: SFD ", 2. CONTRACTOR TO NOTE AND FLAG LOCATION . . . � I 67%ut DB 1630 PG 654 1 � _', �_­ ___ ;Q� OF FLOOD I - USE: SFD � ,� , '_ ( �--%4`� / / "Ir I , __� -,J;),?r __�', #2921 - � - t,_�ff I ,__ �_ , - PLAIN AND WETLANDS. FILLING OR CONSTRUCTION ACTIVITY .... #2929 �,/ /I �_ , , - DB 1038 PG 42 - I � � 4� 1-1 � ___1 1; / 'i " . ) /I I � "--' - ____ ,.I-- % vilill , - I 1__ I, � , --I __ - i I . - DB 2107 PG 115 __ . 4§� ,,�, ,-, �_­� _-, 11 ,/ , - I -­, ,,,�, -""< ____ __ __.. % MAY NOT OCCUR WITHIN THE LIMITS OF THE FLOODPLAIN. % 4* , - - ­ 1 '. - ,, I/ I �. � - , ., / X � - ___�,L % , �1 - � � , -)0//-,/ /�,/ - �, e 1 40 I - ___ ­ // - , " or ,/ , 4 V -,.., ,_", / // ;11 / , � - . - -, % CONSTRUCTION ACTIVITY WITHIN THE STREAM BUFFER SHALL %I _140 - - - / � ,f �P - __��y -",--- , , I � ". . I - " �� 01 \ � - 11� / , , . / / /I � - � - -I___ / . I , � .I.- - I e ;-,�­, /"'-"" / I I ,/ I 1__� . BE LIMITED TO THE SANITARY SEWER INSTALLATION & _-, / - / / / ROPOSED LIMIT -----" - � I I - 1 \ 1, 1 71- �� 111 , 11 , / i I I ,/ - A. I" 1� _� 1\ I , �_� , / � , , / / �,/ �, / Wel SEDIMENT BASIN OUTFALL. NO OTHER ACTIVITY IS ALLOWED To#e 1,, "-" %, �, -1 �, � \,\ �� , , 1" , / LEARING I , // " 11/ ay-_ %& * I % �� TEMPORARY CONSTRUCTION EASEMENT � ­ OF TREE C / , I , \ 1. , . �', . , I\', � � /' , " ! ) J 1z I / � / / // J I // I / I/ __ 'Zk � , T I � ,,% 1, I / , ,/ / / - WITHIN THE STREAM BUFFER. NO TREE CLEARING SHALL I ­� , FOR,f UTURE STREAM RESTORATION WORK I ,/.� I ') I I .. " � � - � � ` , % , �, i � � _.- - " %. . . . . . . . . � I ,� , I i ��' � . � - ,� - \ 11 - ­ .... . �', , 1, _'11 11 , , / OCCUR WITHIN THE LIMITS OF THE FLOODPLAIN. . ." I I 11 � I � � _T8p / .. �­ �, '�� I \ \ \ \ I � - ,` IG SE �C 4�--l` 7 , ,_ __-, . 'e" ! �, — " -11. / 1,�,", I" - % ,' \l\ 1�� \ '\ \ , \ \ \1 . __ r 11.11,1111, / � / " I I "I / ' BUF NU, , / ____1 ; EE,PAOTECTION F "" 1` � Ilk* 'l--_ "'� 1\� , \, P) �.,.\, " 3. SEE SHEET 8 FOR DETAILS ON THE SEDIMENT BASINS AND 01 � � ." " I , � / / " i - (/ // "', / / /UNDASTU 1�6 1 �F T I R 1/ I/ NCE / / - 1, K / / ,� / I ��,� 1� ". . , � \ I I / 11 I " 2V/ �� - / / I i T .� I � SEDIMENT TRAPS. llktl -� \ , � / / 1, / e ,, , I - _­_ V� , I I I ij , �_ � I I I I * " � ' ' ' - a� "'� �' !" 4000 _1� P-1 __ BE L"' SED ' " W,THI 0 C CU ;� 3 S E ! t SEDIN I ,__ " I � 'm---'7 1 � � 1� '* . ". 1.(_ "" I't I �,_j /� IV �, /k / I I "' TMP 45C-11 -A-266 \ `��1111 - �, , �� ,�� ; -, - _', / I A x 'k - _.k_i1L j6.& -k A..6..k A6". -k .�.�, .A., � / . t 1 � \ �� I _, , �, 40"-" -7 1� , , __ ,, �; "..00� I-- , _ . . I J I I , I - - - �__.4=!�� - , / I 'LEY \ �� -7 --- tt�, -, I", � 0��� lT , ,, , 1_. � / ,il `N/F COAKLEY t 8 � , I ll . I A I / (/ I I 'm �,, � I -1 -7111 - , - 4 _ .1. ' " - , , - -11 - 1 4 / - / X11.1 1.1� \ 'I'll I '. J\ 11 I I � k� I I - " 11 - - % Z NE: R2 4 144 / - kl%, � -1 - 1- / � TBA ��� I ,\ 1, , , I �.-MN,,,_ _""k_,,,,_,,,,-,>-,- - � - � / CK Z:I/ I ., i I- I - � I , /' / ­6�t,t, --� i 0 1 -�� -_ I " � - f - I S� I , , I !01� ) � I � , I '1� I _� , -1 k_�, 1, 14 � T i "I , I / - - 11 ( 11 11 " Ik - `1_,1 " � 4 _ 1% I \ OW I :___-,, i f I , / . � I �6'jiLDIN 91 ., � i I- I yB \ I /11 \ / I � / 'i \1 I .��� _____� ,` � , 11 11 i f I / / / SE: SFD - . ___ � I I . i �, �� - / 1#5 - _,.__ % � i -) iF -7 _._-zz-:-­��.__ � . � I I I 11, I �, / / / 11 I Ok4l. - �� � '-, � � �. I f 11 i ; � , 19 i � . : / " " / I '1§11k. � - I � I / I 1 #29 ,it , - : L_d__21 - �__ - \ / ,/ % , , j � A i' (_11 I , I I- (� 'I i I .1 K 11 l / I/ /N i t � � I , j , , \ � i I / ;, �111­ - ----- � � ,I 1, __� . , ) " , ie`_`� \ "k-1 �p . I ,,,J- " � / 11. DB 459 PQ 233 - I - -, I � -) , I I --- � , / I __J1_11 I � / ", , I I / _­, ___ - \ �_ i "-i I i � %, �� 1,4�___­_,_ ` . ' I i / , ; ",� /I / 1.T / 11 / ­ 11 ­* \ i k I IN k R / / I , " � � & 1111, I . l , , T \ I ", r "; � ! i 10' , , / T�J 14L 1 1 , / I - Nk, T I ,,J, TO -, I � / / I -1 1; I / I A �, I -1 - I I � I I � � -)-- ­ I - , 1 %,� ------ - , . T � i � � . ; I ! �,/ 11 �', / l I I _�' . I � 0 ." " � I i ---1 t7l �'i_�� I 'I" � I I I I t, , I � x /I I i � / I � I \ � I j , ��_� ��� I - W/ ... /" / )l I . I l I / J,�� ff _�� , 11.11, . i;/ ; '' f". l �, f / I/ / I \ TMP 45131-1-A-4 I ____1 � I i / , / I / I �� /\ , , , /\ / I , _r / , *111 , , � p I � , I 1�_� , TS "/ 2___� , / -i ,­--� - ­,� i, i / I j.�_ -1 �i I 11.11 , � ?0. , I � E I ; ) I/ - I � 11 , _�_11`_, � � I �� i I . I I � // OIL DESCRIPTION (TYP).' ,, -_ � . I f ­ \ I T /', -,", �, I , ,� I - ', ) I f r , - $ ­_�. i \ / N/F KUHN I �­ 1 7� ","I'li�i ... . ... , - / \/ S, # i : k i ,� % . 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OF TREE CLEARING ASSOCIATED WITH 'i -I ') N/F HAMILTON Ix N/F EMSWILER / ,'-',�D jl,/ USE: SFD DB 1006 PG 681 / -,-", _,__ ZONE: R2 e - ZONE: R2 I // #2927 / ___ - __� THIS PROJECT. THE TOTAL LIMITS OF DISTURBANCE IS 8.95 AC. , 1, i , ill ,_ - ____ �, -, USE: SFD 2. CONTRACTOR TO NOTE AND FLAG LOCATION OF FLOOD � Z USE: SFD J, I,f DB 1630 PG 654 1 ,- --,--- - , " I 1� 41 " - -- , �,.� � __ _QJ�� #2921 PLAIN AND WETLANDS. FILLING OR CONSTRUCTION ACTIVITY #2929 / ji, j", � ---, �- I- , ") ! 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NO OTHER ACTIVITY IS ALLOWED ' I / ; 11 � i 11 / " " /_,� 1, 1'�, \, \,� FOR FUTURE STREAM RESTORATION WORK - , // t , j; ) I -1 I I / / "; / , 11 WITHIN THE STREAM BUFFER. NO TREE CLEARING SHALL � , � , ___ I I / " . \1, ", \ " \' L_ i� I i , 2 . , " " _­_ /I ... 11 . _____ /_ , '�_'_' \ I \� \ 1� : , / - ", 0 , OAC I/ _' -----' OCCUR WITHIN THE LIMITS OF THE FLOODPLAIN. '_ , , I � , G, ET l___/ // _ -_ _"�, 'I-- \- 1� � \1 I',, I . I / "I 9 , I �, _ , -_ I I I � .. � , , � � I �, � I / �', , , , , , \ \ 11 I - / , / / ' I " , /, � �, � 11 \ / TREE PROTECTION F \ / / , , / / I �, I � Tul F / li�CE ,/ I I _1 3. SEE SHEET 8 FOR DETAILS ON THE SEDIMENT BASINS AND , 1�� ,11�, '\11 I\, �% Y_ // / " / / / // NEAS �Bd6 BU .- ,� I'll / I I f // I/ , I--_- --- -, � I ) ; - z �__. I . 1, I \ , , I � I / / Ph � /1 , / / 210�6 i�,_�/ 11 SEDIMENT TRAPS. , ,/ , , ! � I , - __ ,� ­', 1, 11 I'll . . . . . . , . I , , % % .\,, I I - 1! / / " "I, I , , I I I _A1 �Al -A-A. 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"N" __ _.o� /� _::: -- I ------- __-__-__1_1 --- - _,,-_­----::�:- 3, 14, OF-, - - � ---_--- '11 NO? � _��� 11 ___11 _', , _ ­.__­___�__­__ __ ___­_­_.­ --- ___.___.__�­______________. .. __ _z._ __:�__ __ ---- � ---- - - ---- - ------- _L__%__' __ I 1, --I- �:_:, , - _�,__ _� __ ,, 7r7 �' , '' GRAPHIC SCALE 20 40 80 160 ( IN FEET ) I inch = 40 ft. TH,p �p ,0, 0 _ 01 I : i4 C ,SCO: R. COLLINS�� ) 1-� ) Lic. No. 035791.1-- 1 't, gll�11-3 I k , (-/ 11Q�,S�11 ,vL 01VAL S_I�Cwl/o) z 0 , t Q� U (n Uj a z 0 U) a� Ce U) - z 0 LLJ !;� rmn U) " - > Uj ce t� z Uj (A U) 2: F- F- t� ;57 X: Z Z 0 - 5 LU UJ I I U X 2: X 2: < 0 0 _j 0, U U z 0 L C� co 0 0 U D z U U Ul) =:) j Uj %.j F5 Ce Q� LU Uj � _j < Cn co Ln < � r- 2: LU _j < _j < " I�L CL a- ce a a LLJ W LLj LL W (j) 0 " > " > LU LLJ LU (f) " 0� CC w TA j r Lj L, 7 5 1 D 11 I J _j :) .) 5 �� 3) r 0 u 7 v �� E 3: w . v L x o w E � z � 3: ol I . 9 , 2 �� C, 1� , o 1) � o * I ID , a a S: 2 m e 2 16 :1 I w c o u 2 ,u � .� - 18 , _� �Q , t w I ._:� " r , L� z . a) 0 o t� ;57 I CD __ ;57 0 - __ __ __ I I I I fv) j r Lj L, 7 5 1 D 11 I J _j :) .) 5 �� 3) r 0 u 7 v �� E 3: w . v L x o w E � z � 3: ol I . 9 , 2 �� C, 1� , o 1) � o * I ID , a a S: 2 m e 2 16 :1 I w c o u 2 ,u � .� - 18 , _� �Q , t w I ._:� " r , L� z . a) 0 o 1.; 2'x4" WOODEN FRAME DROP INI FT AME ,A THER XCESS IT CORNERS DROP INLET PROTECTION 30D NO SCALE Compacted Soil Non-Erodable liner 18" min. I --Flow 4.5' min. 3. - SOURCE: VA. DSWC PLATE 09 1 TEMPORARY DIVERSION DIKE CLASS I ROCK WEIR OUTFALL W=12.5', L=68', D=2 Cts � i t E : 0 n, , v , 5D BU J r J Zp U NDRB T ® / 4 ' G,SIET8ACI �J f' tt\ 450 -UTILIZE XI 054 PRM SEDIMENT TRAP #1 TNG/APPROVE STSEW R SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA AS BARREL FOR SEDIMENT BASIN. CONTRACTOR SCALE: 1 "=20' x SHALL ENSURE STEEL PLATE COLLARS ARE (spec 3.13)., e 16: Sedlmet>t Tra _ P design I Commercial or Residential 175.200 lbs. HALL REPLACE RISER & BARREL STRUCTURES IN - Kentucky 31 or Turf -Type Tall Fescue 95-100% p SIGN HIGH WATER 25--& ST - Improved Perennial Ryegrass 0-5% Sediment Trap 1 design - Kentucky Bluegrass 0-5% (APPROVED 054" CL. IV RCP SLOPE= 0.60% w/ INV. High -Maintenance Lawn 200-250 lbs. I I Cts � i t E : 0 n, , v , 5D BU J r J Zp U NDRB T ® / 4 ' G,SIET8ACI �J f' tt\ 450 -UTILIZE XI 054 PRM SEDIMENT TRAP #1 TNG/APPROVE STSEW R SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA AS BARREL FOR SEDIMENT BASIN. CONTRACTOR SCALE: 1 "=20' x SHALL ENSURE STEEL PLATE COLLARS ARE (spec 3.13)., e 16: Sedlmet>t Tra _ P design I Commercial or Residential 175.200 lbs. HALL REPLACE RISER & BARREL STRUCTURES IN - Kentucky 31 or Turf -Type Tall Fescue 95-100% p SIGN HIGH WATER 25--& ST - Improved Perennial Ryegrass 0-5% Sediment Trap 1 design - Kentucky Bluegrass 0-5% (APPROVED 054" CL. IV RCP SLOPE= 0.60% w/ INV. High -Maintenance Lawn 200-250 lbs. drainage area (acres) (<$) 2,08 volume (cy) ,< VAd[WBIE" I Cts � i t E : 0 n, , v , 5D BU J r J Zp U NDRB T ® / 4 ' G,SIET8ACI �J f' tt\ 450 1992 -UTILIZE XI 054 PRM SEDIMENT TRAP #1 TNG/APPROVE STSEW R SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA AS BARREL FOR SEDIMENT BASIN. CONTRACTOR SCALE: 1 "=20' x SHALL ENSURE STEEL PLATE COLLARS ARE (spec 3.13)., e 16: Sedlmet>t Tra _ P design I Commercial or Residential 175.200 lbs. HALL REPLACE RISER & BARREL STRUCTURES IN - Kentucky 31 or Turf -Type Tall Fescue 95-100% p SIGN HIGH WATER 25--& ST - Improved Perennial Ryegrass 0-5% Sediment Trap 1 design - Kentucky Bluegrass 0-5% (APPROVED 054" CL. IV RCP SLOPE= 0.60% w/ INV. High -Maintenance Lawn 200-250 lbs. drainage area (acres) (<$) 2,08 volume (cy) ,< VAd[WBIE" Kentucky 31 Fescue 128 lbs. trap volumes:; - Red Top Grass 2 lbs. CREST OF STONE WEIR - Seasonal Nurse Crap " 20 lbs. 428.00 eievatlon (ft} area (sf)voiume(cf) volume(cy)ELM L, ;.Maintenance Slope (teeW_ than 3:1) RISERCREST - Kentucky 31 Fescue 109 lbs. 441 841 0 0.0 • DRY ' STORAGE 1� --- 442 1312 1,068- 39.5 _-. MY STORAGE 150 lbs. 444 2327 4,659- 172.5 5.410.0 February 16th through April ............... . ...... Annual Rye 446 3447 10,396; 385.0; 436.00 August 16th through October ...... . ............... Annual Rye 1446.6 November through. Febroary 1$th .......... . ........ Winter Rye WET STORAGE t MAX. �* Substitute Sericea lespedeza for Crownvetch east of FaLrrnVilie, Va. (May . through September use hulled Sericea, all other periods, use unhulled Sericea). FILTER CLOTHQFKKM . If Flatpea is used ir1 lieu of Crownvetch, increase rate to 30 lbs.,/acre. All legume � seed must be properly inoculated, Weeping Lovegrass may be added to any slope 7.0 or low -maintenance mix during wanner seeding periods; add 10-20 tbs./acre in diameter of flexible tubing (in) (orifice+2") -SEE PLATE 113-1 COMM A00REGATES CLASS I ROW wet storage: -_ collars: wet storage required (cy) (67*DA) wet storage required (cy) (67*nAj _.....' 139.4 ......... .......... .. ... .... .... .. .... .... - ..-_.... _.. bottarrt of stave weir {ft) 443.5ta _ :.__ .. top of dam (ft) 9 , p wet Stora a rovided at this elevation (cy) 139 4, _..-_.......................... .. ...... ........ ....... _., r. 379.2 slope of wet storage sides 1.1 available volume before cler-lout (cy) (34*DA) 192.4 bottom of basin (ft) :weir length (f#) (6xDA) 12,5: dry storage: 428.38 bottom of trap elevation (ft) 441 dry storage required (cy) (67*DA) 139.4' bottom trap dimensions: 7'x107' _-_ crest of stone welr Acip of dam elevation on ft 446 dry storage provided at this elevation (cy) 139.4; r wi of dam top dth ( ) ft 6 ---------- slope of dry storage sides 2:1 top trap dimensions 35x135! 1992 -UTILIZE XI 054 PRM TABLE 3.32-D TNG/APPROVE STSEW R SITE SPECIFIC SEEDING MIXTURES FOR PIEDMONT AREA AS BARREL FOR SEDIMENT BASIN. CONTRACTOR Total Lbs. Per er Aa -e x SHALL ENSURE STEEL PLATE COLLARS ARE Mia mlum Care Lawn CREST OF EMERGENCY SP"AY Commercial or Residential 175.200 lbs. HALL REPLACE RISER & BARREL STRUCTURES IN - Kentucky 31 or Turf -Type Tall Fescue 95-100% p SIGN HIGH WATER 25--& ST - Improved Perennial Ryegrass 0-5% basin volumes: (using 2' contour intervals) - Kentucky Bluegrass 0-5% (APPROVED 054" CL. IV RCP SLOPE= 0.60% w/ INV. High -Maintenance Lawn 200-250 lbs. N= 430.48 & INV. OUT= 43004' - Kentucky 31 or Turf -Type Tall Fescue 100% volume (cy) General Slope(3:1 or lessl TO 34 CY,/ ACRE) Kentucky 31 Fescue 128 lbs. 1630.0 - Red Top Grass 2 lbs. Moa 1.0! V - Seasonal Nurse Crap " 20 lbs. 428.00 150 lbs. 149.2 L, ;.Maintenance Slope (teeW_ than 3:1) RISERCREST - Kentucky 31 Fescue 109 lbs. 3319.0 - Red Torp Grass 2 lbs. • DRY ' STORAGE - Seasonal Nurse Crop* 20 lbs. 432.00 - Crownvetch "`" 20 lbs, 642.9 150 lbs. ELEV.= 449.00 w/ STRUCTURAL HDPE TRASH RACK) * Use seasonal nurse crop in accordance with seeding dates as stated below; 5.410.0 February 16th through April ............... . ...... Annual Rye fi May 1st through August 15th ..................... Foxtail Millet 436.00 August 16th through October ...... . ............... Annual Rye 1446.6 November through. Febroary 1$th .......... . ........ Winter Rye o �* Substitute Sericea lespedeza for Crownvetch east of FaLrrnVilie, Va. (May . through September use hulled Sericea, all other periods, use unhulled Sericea). ( N/ET "STORAGE RRMU D If Flatpea is used ir1 lieu of Crownvetch, increase rate to 30 lbs.,/acre. All legume � seed must be properly inoculated, Weeping Lovegrass may be added to any slope 7.0 or low -maintenance mix during wanner seeding periods; add 10-20 tbs./acre in diameter of flexible tubing (in) (orifice+2") mixes. ALBEMARLE COUNTY CONSTRUCTION ENTRANCE DRAWAGE SWALE DIRECTS MAW TO SEDIMENT BASIN 70' MIN. r SM -2A ASPWLT TOP COURSE IsTING PAVEMENT " 21A DNERSION DITCH SIDE ELEVATION AGGREGATE BASE EXISTING GROUND -70' MIN. EX. CURB OR ASPHALT PAVED WASHRACK EDGE OF PAV'T f 12' MIN. EXISTING ..- PAVEMENT DIVERSION DITCH To MINIMUM WIDTH AT TRAPPINGG DEVICE DESIGN WATER ELEVATION IS 4.0' PIAN VIEW MUST EXTEND FULL WIDTH OF INGRESS AND EGRESS OPERATION SET 1 1/2" WATER HYDRANT WITH FROST 12' MIN. PROOF HYDRANT 3' ABOVE GRADE AND 4' 2%- OFF EDGE OF PAVEMENT. SECTION A -A NOTE: A MINIMUM WATER TRAP OF 1" IS REQUIRED WITH A MINIMUM WASH HOSE DIA. OF 1.5' 5 PAYED TEMP CONST &M SCU N.T.S. SEDIMENT BASIN #2 SCALE: 1 "=20' Table 15: Sediment Basin design (spec 3.14) Sediment Basin #2 Design -UTILIZE XI 054 PRM --- TNG/APPROVE STSEW R 0 AS BARREL FOR SEDIMENT BASIN. CONTRACTOR f x SHALL ENSURE STEEL PLATE COLLARS ARE MSI. VW SMLWAY r WITHOUT CREST OF EMERGENCY SP"AY drainage area (acres) HALL REPLACE RISER & BARREL STRUCTURES IN 5.66 p SIGN HIGH WATER 25--& ST 446 basin volumes: (using 2' contour intervals) 4837.5 (APPROVED 054" CL. IV RCP SLOPE= 0.60% w/ INV. V".> N= 430.48 & INV. OUT= 43004' elevation (fit) contour area (sf) volume (cy) • TO 34 CY,/ ACRE) 426.00 1630.0 0 Moa 1.0! V 738.3 428.00 2424.0 149.2 top of dam (ft) RISERCREST 430.00 3319.0 361.0 • DRY ' STORAGE DE"TERING OWCE 432.00 4314>0 642.9 • WET • sTORAc ELEV.= 449.00 w/ STRUCTURAL HDPE TRASH RACK) 434.00 5.410.0 1002.3 fi dry storage: 436.00 6607.0 1446.6 738.3 o principle spillway crest (ft) . length of flow, L (ft) ( N/ET "STORAGE RRMU D 738.3 � diameter of dewatering orifice (in) 7.0 TO 34 C.Y./ ACRE) diameter of flexible tubing (in) (orifice+2") wet storage: ( collars: wet storage required (cy) (67*DA) 379.2 design high water (ft) 433.64 dewatering orifice elevation ,ft) tc (min) 430.13 top of dam (ft) 436.00 wet storage provided at this elevation (cy) length of barrel in saturated zone (Ls) 379.2 top width of dam (ft) 10'-12' available volume before cler-lout (cy) (34*DA) 192.4 bottom of basin (ft) 426.00 cleanout elevation (ft) available head (ft) 428.38 approx bourn dimensions: 28569 distance from cleanout to orifice (ft) (> 1') required capacity (Q25-Qp),(cfs) 1.75 upstream face slope: 2:1 diameter trash rack (in) Ex. HDPE Trash Rack slope of exist channel (ft/ft) downstream face slope: 3:1 dry storage: head on barrel through embankment (ft) 20.00 crest of spillway (ft) diameter of barrel (in) dry storage required (cy) (67*DA) \i 379.2 baffles: NO principle spillway crest (ft) 432.64 length of flow, L (ft) 107 dry storage provided at this elevation (cy) 379.2 effective width, We (ft) 43 diameter of dewatering orifice (in) \ 4.0 L / We (baffles not required if > 2) 2,49 diameter of flexible tubing (in) (orifice+2") CLASS I ROCK WEIR 6.0 JOB NO. E W=1.4', L=20'1 D=2' collars: YES runoff: i depth of water at spillway crest (ft) 6.64 C (use 0.45 for bare earth) 0.4 slope of upstream face (Z1) 2:1 tc (min) 12 slope of barrel (Sb) 1.82% 1 2yr 3.8 Q 2yr 8.60 length of barrel in saturated zone (Ls) 4.1x4.1 125yr 5.6 Q 25yr 13.95 number collars required 2 dimension of collars principlespillway: available head (ft) 1.0 emergency soil1way: NO diameter. riser (in) 2 4 required i cfs equ ed capac ty {Q25-C�p} { ) rrla spillway capacity, Op (cfs) 13.95 bottom width (ft) rtla diameter trash rack (in) 36 slope of exist channel (ft/ft) n/a barrel length (ft) 55 minimum length of exit channel (ft) Iva head on barrel through embankment(ft) 8.64spillway (ft) Va diameter of barrel(in) 18 97' H. l SEDIMENT BASIN #1 SCALE: 1 "=20' Table 15 Sediment Basin design (spec 3.14) Sediment Basin #1 Design had. V MR SPILLWAY CREST Or EMERGENCY T YATHWT SPILLWAY drainage area (acres) 11.02 MIGN HIGH WATER basin volumes: (using 2' contour intervals) (2S -'ft STORM ELM) elexation (ft) contour area (sf) -UTILIZE XI 054 PRM --- TNG/APPROVE STSEW R 0 AS BARREL FOR SEDIMENT BASIN. CONTRACTOR f x SHALL ENSURE STEEL PLATE COLLARS ARE RISER CREST NNSTALLED ON THE STORM SEWER. CONTRACTOR 2098.9 HALL REPLACE RISER & BARREL STRUCTURES IN f e THE EVENT THE PROPOSED LAYOUT CANNOT BE 446 .. ROPERLY CONSTRUCTED. 4837.5 (APPROVED 054" CL. IV RCP SLOPE= 0.60% w/ INV. N= 430.48 & INV. OUT= 43004' CLFAWi1L:T PCMiT (• WET • REdt1C€D / TO 34 CY,/ ACRE) wet storage: . I wet storage required (cy) (67*DA) 738.3 I dewatering orifice elevation (ft) 447.65 top of dam (ft) UTIt_IZI# X ST N/A P 0 1 ISER! CONTRACTOR 798.7 SHALL PLUG APPROVED 06" ORIFICE PRIOR TO available volume before cleanout (cy) (34 -DA) " CONVERSION TO SWM FACILITY & INSTALL FOUR 06" bottom of basin (ft) ORIFICES AT ELEV. 446.50'. 446.655 (DESIGN STRUCTURE 34: MANHOLE w/ DI -7 TOP, RIM distance from cleanout to orifice (ft) (> 1') ELEV.= 449.00 w/ STRUCTURAL HDPE TRASH RACK) upstream face slope: 4 ' .A fi dry storage: =- dry storage required (cy) (67*DA) 738.3 o principle spillway crest (ft) . length of flow, L (ft) .... 738.3 � diameter of dewatering orifice (in) 7.0 L I We (baffles not required if > 2) diameter of flexible tubing (in) (orifice+2") H. l SEDIMENT BASIN #1 SCALE: 1 "=20' Table 15 Sediment Basin design (spec 3.14) Sediment Basin #1 Design had. V MR SPILLWAY CREST Or EMERGENCY T YATHWT SPILLWAY drainage area (acres) 11.02 MIGN HIGH WATER basin volumes: (using 2' contour intervals) (2S -'ft STORM ELM) elexation (ft) contour area (sf) volume (cy) --- 446.04 12214.0 0 Uj 448.00 14147.0 975.5 RISER CREST 450.00 1622.09.0 2098.9 . MY . STORAC,E �TEWNti 452.00 18078.0 3382.7 • weT • sTORAcIE r 454.00 20E25.0 4837.5 o CLFAWi1L:T PCMiT (• WET • REdt1C€D / TO 34 CY,/ ACRE) wet storage: . I wet storage required (cy) (67*DA) 738.3 design high water (it) dewatering orifice elevation (ft) 447.65 top of dam (ft) wet storage provided at this, elevation (cy) 798.7 top width of dam (ft) available volume before cleanout (cy) (34 -DA) 374.7 bottom of basin (ft) cleanout elevation (ft) 446.655 approx. bottom dimensions: distance from cleanout to orifice (ft) (> 1') 1.00 upstream face slope: 4 ' .A downstream face slope: dry storage: =- dry storage required (cy) (67*DA) 738.3 baffles: principle spillway crest (ft) 449.00 length of flow, L (ft) dry storage provided at this elevation (cy) 738.3 effective width, We (ft) diameter of dewatering orifice (in) 7.0 L I We (baffles not required if > 2) diameter of flexible tubing (in) (orifice+2") 9.0 ( collars: runt depth of water at spillway crest (ft) C use 0.45 for bare earth 0;6 slope of upstream face (Z 1) tc (min) 11.5 slope of barrel (Sb) 12yr 4.0 Q 2yr 26,45 length of barrel in saturated zone (Ls) 125yr 6.6 Q 25yr 48.00 number collars required U In i z dimension of collars principle spillway: 0 o available head (ft) 1,0 emergency spillway: diameter riser (in) Ex. MH w/ Dt-7 Top required capacity (Q25-Qp),(cfs) spillway capacity, Op (cfs) 48.00 bottom width ft { ) diameter trash rack (in) Ex. HDPE Trash Rack slope of exist channel (ft/ft) barrel length (ft) 80 minimum length of exit channel (ft) head on barrel through embankment (ft) 20.00 crest of spillway (ft) diameter of barrel (in) 54 \i 1. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO THE POSTS. J. ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE TRENCH UPSLOPE ALONG THE LINE THE WIRE FENCE AND EXTEND EXCAVATED SOIL. OF POSTS. IT INTO THE TRENCH. � 1 t � � '�/.. 1 t t , /.-.� � Vii• --�+.•.;,;... 450.00 454x4.00 10' 446.00 97'x130' 2:1 3:1 NO 230 66 3.48 YES 3.00 2:1 0.60% 5.9x5.9 2 NO nta n/a n/a n/a Na TH 14 O � SCOT R. COLLINS'�Z Lic. No. 035791,2 �SsIONAL Z 0 a U Ln Lu 0 Z 0 w Ce U) Z 0 Lu Q U) W Z -' 0 a � . � E Ln LA LL' Z3 t 0 Z L 0 J C t/) Q > L Cy Z c I - Z Z Lu Lu 00 ) S Z Z 0 0 LU W � _1 it C m m J J ce Ce � a d U) uj w w 0� 0� U Q 0 _ SEDIMENT TRAP #2 AS NOTED � U SCALE: 1 "=20'N•� SHEET NO. a o. w O 8 N° H 3 M M M M Uj � LJLJV W U ~ C) ' 00 Z zo o io zo ao 80 o J / W �Ln ° Z W i. U O- J . I N M M U Q 0 _ SEDIMENT TRAP #2 AS NOTED � U SCALE: 1 "=20'N•� SHEET NO. a o. w O 8 N° H 3 °6 � � LJLJV W U H GRAPHIC SCALE ' WUj Z zo o io zo ao 80 o J / W �Ln ° Z W i. U O- J O ra 0 ( IN FEET ) N ^ o 1 inch = 20 ft. z Uj C Y / Z U Q 0 _ SEDIMENT TRAP #2 AS NOTED � U SCALE: 1 "=20'N•� SHEET NO. a o. w O 8 N° H 3 °6 LJLJV W U ' =W F_=Z z z °W J / W �Ln ° Z W i. U O- J Ul U ao U) z Uj C Y / v) v 4 ' .A W =- P Ca A CJ11 F• -r s O E o O ( W oC z wzo LLC5C 1.0 LLJ t ' 0 U In i z 0 o 0 C114 a ° CL o� as \i \ Lu C � vo F_ I = oa \ CLASS I ROCK WEIR OUTFALL JOB NO. E W=1.4', L=20'1 D=2' 0 D92029 U a i SCALE ° U Q 0 _ SEDIMENT TRAP #2 AS NOTED � U SCALE: 1 "=20'N•� SHEET NO. a o. w O 8 N° H 3 Short Vein OMP Computations For Worksheets 2 - 6 MM Albemarle County Water Protection Ordinance: Modified Simple Method � _Northtown I'll_ .. _--_-__-_ Water Resources Area Develops tArea �1d - - _ ._._._- . reC E PE„ ., ___,._ _ ,.____.,.... ._ .. . __, -1111.1. ..,_ _ _._ .a : .... ___.._....,,, ,. .. ,.- _ _ , ..., � _, Date 111 -Mar -113- __ . Project Drainage Area Designation PostDgownentt)A# 1 d atn1 to Blofilter.. O L slam pdkrtant export in pounds. L = [P(Pj)RWf2 J [ C(A)2,72 j � --" RV mean runoff coefficient Rv= 0.05 + 0,008(!) � 1. STORM SEWER SHALL HAVE DISCHARGE APRONS AT OUTLET TO PROVIDE PROPER 2-5 Z Pi small starmooffection factor, 0.9 t I�•cema4 imperviousafts . SCOUR PROTECTION PRIOR TO RELEASING RUNOFF ONTO THE FILTER MEDIA. P annual precipitation, 43" In Albe nerle . M A project area in was in subject drainage area, IA R 1095 : Z 2. ALL THREE FOREBA YS SHALL HA VE A TOP OF DAM W10 TH OF 2' A T AN Q c pollutant concentration, mgll or ppm target phosphorus f fack appw to RR � ELEVATION OF 450'. THE CREST OF THE FOREBAY WEiRS SHALL BE AT ELEV. 446' m - ,5/1 ! 7 - A 13580 4 2 2 W rewired teamten wdume in cy. 0.5" o+er irttperv. area ()4 ( ) RR required removal , L(post) - f x L(pre) & SHALL BE LOCATED AT THE LOW POINTS OF THE FOREBAYS ENSURING POSITIVE � %RR rea vW efficiency , RR100/L(post) to ware feet C fetation values feet & s 6ltpervtous Cove omP _ . ( G . ) _. ':..f+ii.,. 1 .. _ .. -... , _.... _ :Area-deveto TotatArew 3[1re-iiev+Bfi4peteM.... `.P� ......... P�!tt 1. __.l Arse _ _ ., .. _ 1111._ 1111. _ Irnpervous Areas SuOotai , m ous Areas svbfiptal , E)dsting Reside�al Subdivision within waw 9,100- 'Existing P4sidentat Subdivision00 9,1 Existing Rte, 29within ralershed BS 550_ '. Existing Planters Bank & Trust 33195. I Proposed Dewptinent- P"09 Lot 111 145, 'prt�powd Dewptinent• Side++tilk 4 6sf Proposed Dewptment- Btnidir)g 45875 i Fut+x e mere ad 10 B ofiker Detelop r 10 SttO 4 Pallor~ of Access Road ..,.1� ,1111. f?1?.. 13755 29 3 _-- _._ .. 1111... i_1111 ---- - ._.............. _ _1111._ .. -._-.. r & Area Ar ea Ac •razed e 9 t SERVE AS EMBANKMENT 467.862x 0.08 37 431. 183 518 x 0.ai3 and s and cultivated tixr►,. Y, 14 1111 • c land Area Area crop ActtMe 1a � SWM ACCESS. PAVEMENT x025 a' x025 .. 11,11, , _ ... _, .. . „ , Other trn erv�ious Areas W a; cava~ , -- i-( I ,- .t itpre) I(post) I Rvtli -1111 V ---9. 63 ; 475 5- K= eti cover 2-01 New Oeve ntFor Uev Areas _ _.__ ( t nB impervsnus )-. a RR i{/89 re e ost RR le C f 1� ,.T . M111 1-1 h 58 2860 64 geL61 Area 23 4 7-118 4a 96, 4 1 f_�.,...,._..-,.., ..fit..... _ --1111-111 t r Construction Notes: General Biofil a Cons a ! stabilized to be adequately stab~ installed until the site is determined 1, eiohlters shall not be nstaq Y water resources inspectors. e erosion control and wet b th YP 2. The water resources inspector must inspect the under -drain installation and approve the soil mix prior to backfriling the biof►iter, and approve the completed installation. Contractor shall contact the water resources inspector 24 hours prior to backfilling the biofrlter and request an inspection and approval of the under -drain installation and the soil mix. General Construction notes for Stormwater Management Plans 1. All dams and constructed fill to be within 95% of maximum dry density and 2% of optimum moisture content. All fill material to be approved by a geotechnical engineer. A geotechnical engineer is to be present during construction of dams. within stormwater management ement 2. Pipe and riser joints are to be watertight w g facilities. o be converted to 'm nt traps r basins which are t nv 3. For temporary sett e a s o Po ry P i n to take lace raw t r management facilities conversions of permanent sto a e ma agp I _ until the site is stabilized, and permission has been obtained from the County r - erosion control inspector. -­'-. - ' , ,, ,l ,! / j ' 40 .r00100 III I i BIOFILTER PLANT SCHEDULE \ SYM BOTANICAL COMMON NAME SIZE CANOPY (so TOTAL SITE \ QUANTITY COVERAGE (sf) TREES / �����` _ , - /, BN BETULA NIGRA RIVER BIRCH 10'-12' ht. 397 7 2,779 /�f / ' / / ' TD TAXODIUM DISTICHUM BALD CYPRESS 10'-12' ht. 79 2 158 /� i �� <� (/i 1 �� Wizz::- AGUNDERSTORY TREES AMALANCHIERxGRANDIFLORA SERVICEBERRY 6-Tht. 130 2 260 �rr r / l�. /;r /r' `'�/ l -- EVERGREEN TREES / / �f /' Z4/ �, / tr i / IN ILEXx'NELLIE R STEVENS' NELLIE R STEVENS HOLLY 5'-T ht. 44 15 660 I / ` / / / / / MG MAGNOLIA GRANDIFLORA'LITTLE GEM' LITTLE GEM MAGNOLIA 6'-8' ht. 82 6 492 { // ! J I /'' j ,, \ ,.-'...".,-"::0;14* l / f / / f �, I f t : / 11 SHRUBS ' // CS CORNUS SERICEA RED TWIG DOGWOOD 18" ht. min 72 34 2,448 , / r/ ' / ✓ \�` / % FG FOTHERGILLA MAJOR FOTHERGILLA 18" ht. min 20 42 840 1 I j I / , J i ! f ! / j i r t � 4 30 420 l HOLLY \,\ 24" ht. min 1 t IC R CHINESE H jj ILEX CO NUTA f IV ITEAVIRGINICA'HENRY'SGARNET' HENRY'S GARNETSWEETSPIRE 19" h / ,- t. 64 44 2,816 I t ; 1 I ,r r i ,� / f TOTAL CANOPY �� sos7/�- ,,� �\ s � � ` /` � r � /� t Ii' I a , o a a 1 I i { ' I� +r1 j I % 1� i o a, ; t \ i ' / , l` i t f \ I i, ; ( ( \ l i i I � � { O i(f r , i I 1 `1 \ I l f 11I i ! \ TOTAL Tc -0. hrs. J 1 f 1 a l \ � j t �I' 0 1 � / I� \ ti 100 OF OL w/ 4 EV -9 Ii j. j .T ; \ � /� �. 11. ( I 1 ' w 1 1 A i 1, � i I ,I I ; � \ �� -- (Tc=0.1 rs t I 1 \ i ,r \ \11�, F w LE �� F C / t `.l 1 4 O \ � �, 1 r � � Tc- . 3 hrs. l r p I i JlI ; \ \ �' I Ij / \ I r a % I / \ i 48Ex J4I . t ( � i �I r !Y I i i \ \ r _ � � i r i i I t i � '--� - }`�"-� �f \ 'l i I 1 _ 1 - I I I f � D. i': fi61' i \ i 1 i 1 0 I r 1 � _ I + l r _ /i , X IMP RVIO , I TI US 1 _. \ i f/Jr7t i a I 1 1 i _ �`_ - F IDE L i AREA RO a , J; , i a 1 w 1 = J '� t °I' ' -_ \\\ \ \ �. 11 ; r l , , l / _ -`� f J ; j FA DEVELOPME / J I I f , \ r / ? I ; l -- -__. D �. #1 f EVAL D AS EX TING 4 lr / / V �% / SWM I N / / / `// 1 \ \ } 1 ` /�7 / . AGN=B7. / / / i / / 1, �� , f -r.. �'J``o.2a s �1 / l i { F fl�l� 1 1ir 1Itr 'I1 l I �'I� ���� / \ =1 // / 'S 1 r '` 1 ;` r � 1 , � fF� f I i r / i � I { t. t �\ I i t 'r i � f , U `�, 1\ i 1 I i` i / f ' i 1 � i r t I� i � � Il 1 / I , r l / / 1 I 1 it �Iiiiiiiiil I\ 1 , .1 , � i I 1 I , a i I I I \ /��/;, .1\i1{i l I , d , I 1 I \ /,! f l \ I c i � � I D �. / 1 I i �. / f, ; - 1 I � \ 1 - i/ /% / / I\ l j I �\ i t T c-0.24hrs. /, / \ ` _ , _ EV 6 ,�'`� F w/ EL �_ O OL A I 0 / / ! _._ I t ( � J / 1 � , f i i _ Tc 21 hrs. 0 /IV% a 1 ---- 475 OF CF wl A ELEV-34 I I % �' f h y- I -, ------ Iii r. \ \ \ 7 A � 7,t1 v � i � � -. �.r �._ __- \ 1' j= - ` % ! ,/ \ { I l tttltt11 ._ / ; D.A. #1A\ �.. EXI . TI ERWOUS AREA ___ _ ' -- `` Imo. I F O TERS-ER& f; , j I I i7.78ac _ /l -- f +;'I�,� y 1�1' ON=64.2 - --- - c S __ I v -- i , , \� _ , - `� -- 41 - ,\ , Td-0.24hrs. - PR POSED IN WM DES GN _ \ , �' \ ���_, ____ --- _ - t' tj --- Co- i ` z_ -- �I I 4 iiz '�) ``t `1 1_ •,,11 �k \ �+ \ \ i -'._ BIOFILTER LANDSCAPING NOTES: ���/ \ � \ BIORETENTION BASIN DETAIL 1. 122 PLANTINGS REQUIRED, 182 PROVIDED. �" I , `�H 2. A MINIMUM OF 3 TREE SPECIES AND 3 _ �, ( ; SCALE; 1 "=20' �'' �� SHRUB SPECIES MUST BE USED, \ \� = \ } _'', 1 I O �� 3. ALL PLANTINGS SHALL BE IN ACCORDANCE - �f , �, .re.., ., f �11 / . . I . `� WITH VSMH 3,11-20. `� s. ; R 4 / ) SCOT R. COLLINS'Z f .��-- 1 +-11 I. SEE THIS SHEE�,FOR LANDSCAPING TABLE �`� i` / / U Lic. No. 035791,E . . . a -v= 4 -'-"- a � . • v.-4� �'_ - . v r,. i :. -L1- . . A�P . lld� . .._- ---� . ' . . 1�0 a VARIABLE WIDTH . / ( / SS E�a� . ! ;4 S.WM EASE . T f , , _NAL _ ----M M. . . . M. .M M.I. M M EAA4 ,jN / . .M.. f . UTILIZ EXISTING PROVED 0 n STORM" (TYP.� . E . 54 . .. � I /I I. '2. BAR EL FOR.SWM FACILITY. 2 C Try ( I, SEWER.AS R �� {1) TD . . � (7} 1V f I. / / TKAZTtJFFSH%CCL R>= ST E-i=LPL E. . / Ct31V E1<1SU ® . . COLLARS ARE INSTALLft�ON THE STOR ® �. . R-CONTR-AC4TQR SHALL L -ACE R SWI & BARREL.STRUCTURESIN.TTHE EVENT.T E. I Q ; . .` a 4 �/ // PROPO ED LAYOUT CANNOT I3 PROPE11 R Y - --'� °-d = - ` - -� - J S CON TR TED.. . .CONSTRU 0 \/ 54 1 V RCP SLOP 0. (APPROVED 0 CL 4 ( Y k / i x 1 wl INV IN= 430.48 & .INV. _OUT- 43Q.0 ) � , / \ , ,� .. I . k . i PROPOSED ACCESS ROAD (35 � � �� � ., �., k � � � / � �' z SDWK-SDWK) SHALL SERVE AS { �`_- '/ �x \ o i, k - 5 4 / '. A E i ; -- _. l i i } # to 2 - I N IPE w ATERTIGHT-`1 ( AN -OUT STAND P / W . .. ) 4" SOLID PVC CLE \ t �c , W ., AT rm t... CLEAN -OUTS TO BE PROVIDED T ADED PV CAP. CLEA'Ir- / THREADED Ci' + AJUNCTIONSAND THE END OF THE UNDERDRAIN PIPING, T yy� k i V 50'0.C.MIN. �i't a - O SYSTEM} I ,-, THE UNDERDRAIN S S E! 1 ALONGN r :r: P ,, � I MG .� . . k . t . , . . [ ! /. "M� LU r SHALL PLUG APPROVED J06" ORIFICE PRIOR TO I * i � ' i � '- �- i i I. T FOUR CONVERSION TO SWM FACILITY& INS ALL F U 1.r Y' ,06"LOW-FLOWORIFICESATELEV.447.o. ALSO, \ r I * 11 FG I�`� 11 I�, k. I � I y R TO ELEV.45o'. T HALL RAiSERISE CONTRACTOR I' � 4 I ' i j : q .'M: L w D1 7 TOP RIM I RE MANHOLE S7RUCTU 34. r(DESIGN1 I T � .FLOOR / OIL ER ELEV.= 449.00 w STRUCTURAL HOPE TRASH RACK) Y / I EL V:= 446.0' 1 8 FG .. . . " �. i k i B � 1. I I (9 FG I . . . k� 1. } 11' . GRASS GROUND COVER FOR SLOPES I T D Is I. (f%i GREATER THAN 3:1 IN SWM FACILITY. GRAS 7 IV'. i I ,. -�' : ; i 6' IPE)?FOPA�'ED SC ,RULE i . z GROUND COVER LIMITED TO CUT SLOPES & . o (�} BN f 40 PPC. PfPE O w SHALL NOT EXTEND INTO THE SWM F CILITY U f� I I � I ... ) t- I . WIVALEAT AAA2 0% o 1 f i LO iR�IN AC 0 .S PE R ly (3) FOREBAY WEiRS SHALL 8E MADE OF CL. J - 3 I r, k. `., •� $. t' R! ! ,f B X IL 7ER FABRIC V RIPRAP w GEOTE TILE F E IRE 'WIDTH ®20 C.' UNDERLAYMENT AT (3) 5' WIDE WEIR CRESTS. `/ " O�tTFALL PIPE (T , (3) FOREBAY TOP OF DAM WIDTHS = 2 AT k: +r 9 t V �, a 5• CS S 450: u� EVA TION OF EL : f I APPROX. BANK FOREBAY BOTTOM DIM: 4 x12 7 IV / ' ' , t.. � i1 k' , 1 V / :l w/ A WEIR CREST ELEV. = 448.8) 1 1/ - * \ � \ , ARIABLE WIDTH �� (APPROX. RTE 29 FOREBAY BOTTOM DIM: 1 TD x * WM 1..EASEMENT � 6x14' w/ A WEIR CREST ELEV.= 449.68) . 11 , (APPROX. PROPOSED DEV. FOREBAY BOTTOM i5) IN '� � \ (TYP. )/ � I DIM: 8'x27 w� A WEIR CREST ELEI/= 449.16) ' *7 'fG:`, \ / , -__.__ -_ .__-.__---__ ._... __-_-__._.. 7 . . . ,lR ±f r` ... � I . . � i . , , ' _ . . k t '1- :+ 1.1, .t., 1 CCS` i f . P "::L�- � iiiiiiiiiiiii Ift ---- - ­-- ----- . . I .1 . 11 � .. ti unf - - -- �/ _ .._ --- _ _ _ _ - - - --- �_ -- __ - -- _. O 1111 __- -- - ... ... ._ _. 1111, ... _ ... 11 M 1111 ..,,....,. .. � 1.111 ... ,.. ,... 1111. .. ,11.11. .. .. .. . - . -..,. _ 1111,,-.., .. _1,111_ ,. , _ 1111. 1111 i Q x. _ _- - 1 A+G �, ��,,.�__-._---�--1111.:• VARIABLE WIDTH SWM - o/-- { � '-" � r � ..__ ___._. - _ __._ ._ ��'._____--'.-._._ __._ 1111_. _ ____ __.__ _ ___..__ �� __. __. __-_ - i � � ! _11__1_1.___ _r_._-1111__-- --___..-- --- - --EXES fiNG-tMPERVIE3US AREA .._._ - - J m , ---__.__._ .._ -'--_-__._ _ _. _. __. ___. _ M EN T COINCIDES i * - __. ____ _-___-.--__---.-_-_- �, -- -- _------._- .< ------ "FROM RTE. 9 EVALUATED A - - / / 4-- i" - - - - - _ �a ___._ EASE I° e r >._ _ _ _.-._-'-_ --.. _...__ -- --__._ _...__ _ ___ -1111._ ___ . __- _-- _.---_-_-._ ,: _____-� --- _ _ - / � - ; w EXISTING UTILITY ­- - ---- ---- r - ....�_.. tin , ��^-' , ` __ ._ _ / ,x , ';'i-'2 k PF POSED t WM DESIGN _ __.._ ____._ - 0 ___ __-___ ___ _11 - _ _.__ _ -- ----- _____ _.--�._. -- -__-- -. _ _ - :� _ --.. _-_. _/ -- __.__ -- - -- - --- - ----- ­- ----- - ....... ----1----- _- --.. - - - _.-.�- -- - n - --- - --- - r ESMT. ,�,, ,_ -- € W W . -W -- -- - -W - -- W- -- ---W - - S GAS --- -r 1.11 __/r • y> k - _� _ - - S - �AS GAS GAS GAS GAS GAS - - \V--- --- GA - - SAS LIMITS OF PROPOSED SWM FACILITY �� --" r = I - - _ - -- ---- ._---- ------ k ' * k , * * - % ;w s .-''" -- �.,1----- ..---------' - ---- ----- -- 11_1__1 _. _- __ ...- --11__11. \\'• .tea--- % / -1111-_..._ 9: - 111__1. _11.11_ .. 1111. _...- _1_111_ ____1111.._ .__- ._-._._ _____.___'\. -' __-�__ -_.._. - 11 - --t`- _ � - _'.i ��� >.T .._._.�____. _--_____- ... _._--__-._._ ..,,., 1111.. ,. .. _--1111-. 4 - lh •%C%''lf % (,< -_ -._ .._.-__ ___.___._.__ _._._- 11__11__- ___..__ ------ 1_-_ - ._.__ --._. �.. '; --- E. W a= t , _ _------_-__ __.-_� --. --__-=----._.-...__ - _- _ 111 1 -- __.. __ _-__ _ f� TS --OFF RT �20-R� �y - f45�'-EVATf9N)-ARE 01�TE __ -- __-- . __..._ __ _. _: ,_._. _ _..---_._. _ _ ._. _.._......_...-_-__-- _-_ -_- -_ _- _.__.-----__.___. - - - a _ - _ - --- - _ f a �� �, r S x . AG fit .: 2 ----'---- ------ ----- ------ .-'.-.----- _-__-- ---- - --- - -- -a t ( 1 1�6 ­-­/ ..... _- ___ � �. - _ _.__._ ------__ _ -.--1111.__ _ _ _ _ ._ _.._ _ __ __ ._ - __ . __.__.__1.1--.-I._. ---.. --1-------- _.�_-__._ - _.-_ 1111: , /` d •V ,l4iiYj: rl lf�j r � \ _._ ___�_ - PRE DEVELOPMENT + ___, �__ -- .. a 4 ... .: .-.�--=- , . ..: _ ,. :.. , 1111 _ .. ' :.: � � ..� i .. -.. , ....:.... 1111. .. .. . _ . , ' . ...Y �.,..- . - _--.__�__-. s . ,... , .. a a a 7 .. .. _ 1111, 1111 : �. : =- 'cl - / I►. ► . a v. 4 __ -- f SCALE, 1 -80 a a a v06 z .. _ ' . a a - ? - _1111--__.A - 4 .ice m a - 9 IV � __----__---- 11___1_1_.__.___ µ�.....__-__-.. ���-..., �' R3I©R2ETENTION BASIN FOREBAY REQUIREMENTS: Area of Bank Area of Rte. 29 Area of Area of Total Area of NOTES: VARIES PER PLAN BRORETFJ�TRClN BASIN FLOOR REQUIREMENTS: - Elevation Volume Elevation Volume Elevation Volume Elevation Volume Elevation 1. SEE PLAN DETAIL ON THIS SHEET FOR r rvi us Area includes ex subdivision 293,466 Minimmum Forebay Volumes= 0.10 inches per pr -posed Forebay Forebay Proposed Dev. Bwfilter FaCIIltSt Volume (cf) APPROXIMATE PLACEMENT OF UNDERDRAINS. �_ WATERTIGHT, THREADS ) Total laps O ea { )PVC CAP 4" SOLID PVC CLEAN-OUT PiPE. Techr►icat:Hulletu (ft) (Cf} (ft) (cf) (ft} (Cf) (ft) (Cf} (ft} CLEAN -OUTS TO BE PROVIDED I tV{ogs t1arC' c'ICre COntoUrs sf Contours Foreba Contours Contours (sf) UNDERDRAINS SHALL BE 6" PERFORATED �e ;,1,111 _. e,.. •w _.,, , , ,,_. (, .,,,,� ..., ,,_.., 1,111, , ,, ,, , ._.,._ , _......................... - _ . _ __._.. . _ 111.1. _. Pro t ~!nous Area to SWM Facile 270,611 sf _........ , ,, ._ _._ _..� . _ ...� .._�. ............._., . .. w,. �_� ,� �.-w.._.__,-... �._�.� _,-..-k._. __1.111 �_ �__._... �-.._. _ _ _ _ _ . _ .._ .._ . _ .. _ . _ _ .._ . _ . _ . _ _ . _ .._ _ _ .._ .. _ ��� nlpe �� 1 .�' SCHEDULE 40 PVC PIPE, OR EQUIVALENT, AAA2 _ _.. _ . _ , _ _ _ ^ _ .. � Y __ _ _ _ __ _ _ _ _ _ 4 - � - _ - . _. _, -. AT THE END OF THE 446 38 0 446 61 0 446 21 d i 446 12,199 0 446 2,5 2 0 _ . _ _ _ t areas ewe for ewsfi residential sub. & Planters Bank Forebay (includes Future Dev.P _.,.__�_.: - -._, __�,�.,_�,.�.,___J _ . _- -- . _ :. _ . _ __ ..- :6_.:. _ . _ .. _ . _ _ . _ :. _ . _ _ . _ _ . _ (Includes all impervious pt n j �% { 1.0% SLOPE (MIN.) TO RISER & BE PROVIDED _ . ._ - __ _ . _. - _ - _ - _ . ._ ._ . _ _ UNDERDRAIN PIPING AND _ 448 907 139 448 138 194 448 377 584 448 14,017 26,1'94 448 14,639 , 27,123 . _ - _ . -7 -- __ .._ _ ...-MIN �. __ _. _ . _ .. _ _ _ a r#IOrt of access ~Doti asset Contributing Impervious Area- 43 635 448_ .. _- 1- 9 . _,.�_ , ,,,__., _11 1_,1_ w, _.. _ ACROSS ENTIRE W/DTH � 20'' 0. C. MIN. _ - _ - _: - - _. _ - _: - _ - _ - _ ALONG THE UNDERDRAIN pp bypassed) g _ _ _ „ _ _ .... _ . ._ . _ _ __ __ .. .. _.. _ _ _ _ . _ SYSTEM EVERY 50 O.0 450 202 443 i 450 240 567 450 576 1 530 450 16,013 56,202 450 17,031 58,763 2. UNDERDRAINS SHALL HAVE 4 SOLID PVC 2.5' _ , . _ _ _ _ _ . _ _ _ . _ _ _ _ . _ __ _ _ Minlrnurrs Tota( Forebay Volume- 364 d,_ u . w; 2 _ . _ _ _ _ _ _ _ _ _ _ _ _ _ - _. __ o S67 - 452 1 J 552 91,708 452 19 552 95 317 / CLEANOUT PIPES w WATERTIGHT, THREADED - - - - -_ _ -- Min. Btofilter Floor Area Re d for 651a RR 12,177 sf Route 29 Forebay 45 443 452 452 1 530 sI - -. -MIX I - _ - __ ' PVC CAPS AT ELEV. 446.5 THROUGHOUT. 1 . - --.-MIX .- - � _ _ . _ -- - _ _ _ - 6", SCHEDULE 40, PERFORATED Contributing Imi)ervious Area= 675,550 454 443 454 - 567 454 1,530 454 21,891 133,129 454 21,891 1.36,738 J. UNDERDRAINS SHALL OUTFALL INTO THE - _ _ - _ . - . _ _ . _ _ _ _ -- .-. - _. - _.. _ _ Minimum Total Forebay Volume= 546 4••55 - 443 455 - 567 455 1,530 455 23,001 155,573 455 23,001 159,182 RISER. PVC , SLOPE T IN, SPACED PER �; PLAN, SLOPE TO DRAIN Proposed Development Forebay 1.5' 3" 1' r�, s � > ' � J} � l �~ ' � Na. 78 STONE COMPACTED Contributing Impervious Area= 161,426 1 -L - Minimum Total Forebay Volume-- 1,345 3" = NO. 57 STONE COMPACTED NO. 78 STONE COMPACTED BIORETEN774NFILTER SECTIONSHOWING CLEAN --OUTS Project Watershed Sunwery (Area) _ , _...' Pre -Development Post Development -- .._____. �_. ,_.... __._I D.A.,-#'EA � 3.17 .,.___ ,- _._, r�C___ 10.95 ac. D.A. #1 B 7.78 ac. Total=1-._ _.. _,. -_-1-1.1.1-111_ l- 10.95 ac. 10.9 • Project WatershedLLS .....ry (2 -Year Flow)_ __. _ _ _. i Pre -Development Post Development _ __- __- _ D A #1 A 645 cfs ___ _ _ S.U4 CfS D.A #1 B 1 147 cis __ - Toiai= �. 7.92.._.____-_.-._.._._._ cfs .- 1111._. 5.� 1111__ cfs ._. Protect Watershed Su ,y ry (10 -Year Flow) _ . 1111. ... _ ..__._._.._ Pre -Development .- Post Developrre_ nt.. _ _. 1111 ..-- D.A #1A ' 16.99 cfs ___ _ _ , 1.0 27 cis D.A #1 B 5 32 cfs __ .,- w . , -. -,._,. Total-- 22.31 cis 10.27 cfs AP R VE 0 2 6 0 0-N th o ho e O T. The applicont shall restore the channel from the property tine of RMP 45-110 to the permanent pool of the first Carrsbrook Pond on TMP 4581 -01 -OA -3 as a compromise solution for meeting MS19 "Adequate Channels" as per the ogreement reached between the applicant and the County on May 29, 2008. The applicant will excavate the channel to the cross-section designed by r 'd a applicant on Januar 4th 2008. A c of Albemarle County Engineering and p aw ed to th opP Y copy this rross-section is shown as detail H/Set on Sheet Sit of the Final Site Plan, The routing of the channel will follow the natural course of the stream to the best extent possible. A detailed TOute will be -provided for the County's review and approval prior to commencement of channel restoration, In the event the County would like to modify the route, the applicant agrees to route it as directed. The above agreement requires the applicable permits from DEQ/ACOS, as well as permission or eosements from the property owners affected by the restoration. The applicant shall request Ph 1 f permission from the affected fond owners upon issuance of a grading permit for ase a Narthtawn. Once permission is granted by a1 affected property owners the applicant shall have the r t r I f he stream routing, n on c ova o t f .oval b .he County, , t e n submitted for a , roue deer n d a d s UP PP 9 9 PP y Y the applicant shall opply for and obtain all necessary DEQ and ACDF: Iierrhits. The applicant shall olso submit a plan for stream diversion while the work is being performed for approval by the County,- As per the agreement reached, the applicant -will seek permission from the affected fond owners. for a time period that starts at issuance of a grading permit and extends for two years. otter the first Certificate of Occupancy is granted for the site. If permission from all affected land owners is not obto`ined within that time frome the applicant shall not be required to restore the channel, If permission is granted by all affected loud owners, but DEQ/ACOE 41 not permit the work, the applicant cannot, through no `cult of the'ir"owns, perform the restloration. n s {<;. x! xyp2caj CToss Section for ~Offsite Improvemems ` , I or Acle nate Downstream Channel v' ' I VIZ -__. _ S11 toot 1010 esus 1 _ �!i` �� i - // / // i -I-- /, 1 -- / t: � I I � � � �- ---' - 1 / 0 ,/ i l '� 11-------, f I : ; V I s I `/; t� _' -- .- ..Y-_ - M11 W W S GAS -- i♦ 19 �/ TOTAL Tc --0.21 hrs. 1 'OF OLF w/ A ELEV=9' (Tc=0.18 hrs.) 65' F PE MOUS CF w/ A ELEV=13' c=0.00 hrs.) 475' O IMP MOUS CF AT = 5 fps , \ ** (T 03 hrs.) / \ o` � � ' , 1..A -- - . _ -- ---- -----------I-- / I - -- - - - j. _ _ _-------/--- - - _. - -. - -- - -- _ � , - _ - �� ---- ---------- - --- - --.. .._ __ /.. 11------/---_ =- W �- /-, -- 111 ,, ihl - f- '<i�At � - 1, �AS GA -GAS GABS GAS ��:GAS C \ \ -------.. _ _--- - - ------ -- ------ --- - -- -- - -"---,-\- _ __ _ �_` __ _. _ - -1 - _ ._-._ _ --- _ _ s - --- - . � a \,, " ` • \ �,- ---Z--'- ---,�- - - _-r... -- -- __. _ __-_- �- --1111 _..,c-.-__....... 1111. _ ....____. �A _---------------------------_.. --.1-1-16 _- _ _ ------------- _�1 \- :POST-DEVELOPMENT -LLY SCALE; 1"=80' cD MM z � 0+50 1+00 1+50 2+00 2+50 SCALE; 1 "=5► (V) 1 "=30' (H ,-! • ,T - 11pp _ �� _.._. - _ ;. 0 30 �ii� 7 Minimum Standard r W stria pw Asd **tat ausab a .era $/a' f*AW r IN " �. $-I/*- m.. hales () 4 71�0�- ®,} Isomet c rVWT VU/ V Section /e- m•. haft, as !ta �" Pyle ' 11 -.,t . wows .use eruava put* 9A BDP& .a hNwr urla .tea x -:!e' -w � s;aut.t. I/ o tatime+ o. aor,z�. rra. �. Q�� r -- , I 91 Cis N T I C>C7 ) t a f L-_._- 1111_----_----- ' i' e" ELevation Pr,ns "C N' tr 0" tt..a BMP DEBRIS CAGE S'a1,UT10HS R.O.r4d"Ift T& am 4 INC rill-10-�s _- I TB7 -,3 NOTE- IN ACCORDANCE w/ VSMH 3.02, ALL TRASH RACK & DEBRIS CON7ROL COMPONEN7S SHALL BE STAINLESS S7EEL OR GALVANIZED METAL PER VDOT SPECIFICATIONS. TRASH RACKS ATTACHED TO CONCRETE STRUCTURES SHALL BE SECURED w/ STAINLESS STEEL ANCHOR BOLTS FIGURE 3.01 - la Homogeneous ,Embankments xl Seepage Contwls s BII / I r .- - I , F i ' • ' ` -Gut off trench -4' below stdtoble I material Snit or mck TYPICAL HOMOGENEOUS EMBANKMENT Transition fill .eAOok or graved fr Perforated collector owdotion draiI.. Pipe outlet n s is Blanket drain FOUNDATiON DRAIN BLANKET DRAIN r* 4r reCM Rock or gravel toe,,. drain Tmttsr'ttan fitter Trar�ition filter CHIMNEY DRAIN TOE DRAiN c:�3-01-1a 1"terce: SCS F.+rgbic,ot*tg Field ,43arn"al 301-3 LU g � Z L a O J , to Q UJ � c c� z = i (n to w w ) C2: I O O s 0 0 � � � X C m m a a C m- a a a UJ 11J 3 � � MM M M Z .1 1-1 O ~¢ 0 � --" o � 1. STORM SEWER SHALL HAVE DISCHARGE APRONS AT OUTLET TO PROVIDE PROPER 2-5 Z -- .1 SCOUR PROTECTION PRIOR TO RELEASING RUNOFF ONTO THE FILTER MEDIA. M M Z 2. ALL THREE FOREBA YS SHALL HA VE A TOP OF DAM W10 TH OF 2' A T AN Q N � ELEVATION OF 450'. THE CREST OF THE FOREBAY WEiRS SHALL BE AT ELEV. 446' m M & SHALL BE LOCATED AT THE LOW POINTS OF THE FOREBAYS ENSURING POSITIVE � I LLJ N DRAINAGE. INSTALL CL. I RIPRAP w/ GEOTEXTILE FiLTER FABRIC UNDERLAYMENT AT ' U)IIZZ Z� 5' WIDE WEiR CRESTS. FOREBAY DAM & WEIRS SHALL HAVE 1: I MAX. SLOPES. N � o LJLJQ Li o � V _ Cr Cr N PROPOSED ACCESS ROAD - z p W I.(35' SDWK-SDWK) SHALL � IC, Q 460 SERVE AS EMBANKMENT � 460 � SWM ACCESS. PAVEMENT 0 K-1111 U)W W ELEV. 455-459f c N O I I a a O I RE AINING WALL, M z i i 1 - -------- --- - --a-- ------- - - ------ -_-------S NS,---- �i ----- - oil Z - -- -- - `-- - � oZ Nw Z PLANS f FOR DETAILS L C Z oW 1 455 1 II 100 YEAR . CONTRACTOR SHALL UTILIZE � 455 D \ W. S.E. = 452. 2' HDl�E TRASH RACK, OR - - - - - U oo n - 10 YEAR W S. E. = 40.59' EQUIVALENT (RIF/CE `V \ (Ar' IIIIIIIIIIIIIIIIIIIr..� -- ----- - -- - --- - -- I _ -_-__ .___�__.COEF_ ._ -YEAR - ---- --11, FFL.i6-0)-_- __ _ -1111 f _ -_ 1111__--- I 1\ \ , J W.S.E.=449.OJ' 4 f BE 450 I i \ j EXISTING GRADE TO / IN �� } IC I 450 IW z Z° W U 0 BE EXCAVATED. _ V�.H_- \\\ I O N j BtL ESN � DETtIL I i I I \ i BOTTOM OF PROPOSE / P V ":...D D ON THIS H ". T I I 1 I --- -- BiOFILTER ELEV 446 Oy -- ---- - - - - ;L_ ce CL I I.- I . --- S�OPE -- CQNTRACT - )RSHALL PLUG�tPPROr I I I . -- -- @6r" ORIF/c PRI I TCT 1-79N /ERSJO TO - _ _,11 _ _ _ - - - ti " _ __ . - - _: _ 445 , i - ) - -. SV{rMFACIL -- Y&llsISTALL:F�?UR86� 445 _ : - _ . _ . - - - - ! _ _ __ - 3,,. __ - - a _ tV - - - _ I . - - PRO­11VIDER ORI/ tCfJ'Afi€G11 . } . • D!T/ONAL QETT1. INT10111� v/A SOTTO OF BITFN-TER- - - _ _ _ _ _ MAX PONDNGDEPTHOF_a 1. `(ORIFICE MIX LEV. = 4 3 - UP. A ALSO, CCSNT ACT111.11 I I _Ct7EFF SHADY RATS -014'. -- - _ RISI .1. ` TO FL V, iso' I I I j NO. 78 STONE COMPACTED j 3., ST ' 440 i I - _ I NO. 57 'STONE COMPACTED NO. 78 STONE COAfPACTE _ 1 , w/ A TOP ELEV, 440 (BOTTOM OF SWM MIN ABOVE & BELOW UND4-RDRAIN - ` "` 446; TYP. DEP7�1= j I FAgLiITY ELEV. = 442' - - _-__ _„_ PiPE II i 2.5'1 SLOPE= 0.0 9' ----__I__I - _____.._-_-1111___ __ _ CONTRACTOR SHALL INSTALL A*_ _-._ _____-1F-- ----_- -TEXTILE` i GED FIL TER FABRIC ? I IMPERVIOUS CORE w C T OFF 1 I I UNDERLAYMENTBETWEENTHEi I (TRENCH. CONTRA6'TOR SHALL ENSURE I l 435 _ I� EXISTiN� B/OFILTERANDTHE EX/STINGGROUND.1 - I _ EMBANKM8,NT & ACCESS ROAD I 435 1 I .S(/BGRADF CON_STR �T /L - - - .l 11 3% _ I ACCORD�,NCE w -v -THEA DETVr1L- �-EXISTING STR 20 (MH -1) ! � i -- -- _-,_j I PROVIDED ON THIS SHEET. - yR I M 4 5 3.0 i NV IN --440.84 1111 -__._ - - -- -- ----'- - ---- ----- ---- - - - ---- ----- -- -- I _._ . ---- --­­---­---­­� ------- i - 10'x10 x18 Dl EP I I it,NV VN -448.9 i I I CONC. BASE 1 I 430 INv. OUB -43 .1 4 I EXISTING STR. 34 EXISTING 54" - ,L. IV RCP ' 0.6% I 430 - - - __ - _ - _ I MH w DJC GRATE - lam-. EXISTING y,ONCRETE 0 TLET --"� RIM -449 0 INV. IN=433.28 PROTE4TION w� PlL S __ 1111._ ___-- -1111 _-----_._-_- - -- --- _---- LV, QU11, _ - - 45------ i - --- ------ILF-E-EXISTING/�A+ROVEDf�lSr}-STORfW S-WER-AS EXISTING ONC RISER STRUCTURE SHALL. BE SECURELY BARREL FOR SWM ij ACILITY. CONTACTOR SHALL FAS EN TO EX. STOkM SEWER & B� WATERTIGHT. STRUCTURE 15 ADEQUATELY ENSURE STEEL PLATE'�OLLARS ARE I STALLED ON HE 425 425 CONTRACTOR O VERIFY RISEN RISER IS NO:11, ADEQUATELY+- STORi'N SEWER. CONTRACTOR SHALL, REPLACE RISER& INC! '1 J ANCHORED 101RED. IN A MIN�MUM 15'X. CONC. BASE OF so'xio x�8"DEEP SHALL LAYOUT CANNOT E PROPERLY CONSTRUCTED. I I BE INSTALLEDiAROUND THE STRUCTURE & BOLTED TO IT w/ (APPPOVED 054" CL l /V RCP SLOPE1 0.602 w/ INV 422 422 STAINLESS STEEL ANCHOR BOLTS. I IN- 430.48 &INV. OUT- 430.00' I M O O O r q to 00 00 00 11-t LO N `t It `T ,d d d 0+50 1+00 1+50 2+00 2+50 SCALE; 1 "=5► (V) 1 "=30' (H ,-! • ,T - 11pp _ �� _.._. - _ ;. 0 30 �ii� 7 Minimum Standard r W stria pw Asd **tat ausab a .era $/a' f*AW r IN " �. $-I/*- m.. hales () 4 71�0�- ®,} Isomet c rVWT VU/ V Section /e- m•. haft, as !ta �" Pyle ' 11 -.,t . wows .use eruava put* 9A BDP& .a hNwr urla .tea x -:!e' -w � s;aut.t. I/ o tatime+ o. aor,z�. rra. �. Q�� r -- , I 91 Cis N T I C>C7 ) t a f L-_._- 1111_----_----- ' i' e" ELevation Pr,ns "C N' tr 0" tt..a BMP DEBRIS CAGE S'a1,UT10HS R.O.r4d"Ift T& am 4 INC rill-10-�s _- I TB7 -,3 NOTE- IN ACCORDANCE w/ VSMH 3.02, ALL TRASH RACK & DEBRIS CON7ROL COMPONEN7S SHALL BE STAINLESS S7EEL OR GALVANIZED METAL PER VDOT SPECIFICATIONS. TRASH RACKS ATTACHED TO CONCRETE STRUCTURES SHALL BE SECURED w/ STAINLESS STEEL ANCHOR BOLTS FIGURE 3.01 - la Homogeneous ,Embankments xl Seepage Contwls s BII / I r .- - I , F i ' • ' ` -Gut off trench -4' below stdtoble I material Snit or mck TYPICAL HOMOGENEOUS EMBANKMENT Transition fill .eAOok or graved fr Perforated collector owdotion draiI.. Pipe outlet n s is Blanket drain FOUNDATiON DRAIN BLANKET DRAIN r* 4r reCM Rock or gravel toe,,. drain Tmttsr'ttan fitter Trar�ition filter CHIMNEY DRAIN TOE DRAiN c:�3-01-1a 1"terce: SCS F.+rgbic,ot*tg Field ,43arn"al 301-3 LU g � Z L a O J , to Q UJ � c c� z = i (n to w w ) C2: I O O s 0 0 � � � X C m m a a C m- a a a UJ 11J 3 � � IN mr-M vi MM M M W-1 .1 1-1 1-4 ~¢ 0 � --" o � -- -- .1 N M M IN mr-M vi rn AV VI,. - (i (i N 7 M 15 I LLJ N /1 o N CL LJLJQ 3: > I z W IC, J F-4 � 0 K-1111 U)W W U) , V l LU LU c N O a a O T ZJ cl� M z o Q - IllLy U LMUc W iy oil Z I � oZ Nw Z z <c L C Z oW W W S oz u F- U � � 0 `0 D Z ce o o o °, _C 3 N Z �- W U oo n - W o �- 2 3 a (Ar' IIIIIIIIIIIIIIIIIIIr..� E N � � as X U) Wr o E� s T *' J O Eo � L.L. O -os C •5 LqS Z c w o 01� a IW z Z° W U 0 Z N K, =o J o 0, U O N o c \ =C o om C as r W J F- ,--a N Z c U o o ' � U W O H W W a, �� Q, o ce CL = I to o ' 2 JOB NO, 092029o 0 Q� SCALE AS SHOWN 0 a o SHEET NO. oel ad 9 ,N wo � 3 The applicants shall restore the channel from the property line of TMP 45-110 to the permanent pool of the first Carrisbrook Pond on TMP 45131 -01 -OA -3 as a compromise solution for meeting MS19 "Adequate Channels" as per the agreement reached between the applicant and the County on May 29, 2008. The applicant will excavate the channel to the cross-section designed by Albemarle County Engineering and provided to the applicant on January 4th, 2008. A copy of this cross-section is shown below. The routing of the channel will follow the natural course of the stream to the best extent possible. A detailed route will be provided for the County's review and approval prior to commencement of channel restoration. In the event the County would like to modify the route, the applicant agrees to route it as directed. The above agreement requires the applicable permits from DEQ/ACOE, as well as permission or easements from the property owners affected by the restoration. The applicant shall request permission from the affected land owners upon issuance of a grading permit for this plan. Once permission is granted by all affected property owners the applicant shall have the route designed and submitted for approval by the County. Upon approval of the stream routing, the applicant shall apply for and obtain all necessary DEQ and ACOE permits. The applicant shall also submit a plan for stream diversion while the work is being performed for approval by the County. As per the agreement reached, the applicant will seek permission from the affected land owners for a time period that starts at issuance of a grading permit for this plan and extends for the period of time until the site is stabilized and all WPO bonds for the site have been released. If permission from all affected land owners is not obtained within that time frame the applicant shall not be required to restore the channel. If permission is granted by all affected land owners, but DEQ/ACOE will not permit the work, the applicant cannot, through no fault of their own, perform the restoration. 7'Sffvirat (,Toss -Section for Offsite Improvements I or Adequate Downstream Channel ,. _...