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HomeMy WebLinkAboutWPO200500030 Plan - Stormwater Stormwater Management Plan 2005-05-16Soutbwind Estates MAINTENANCE Erosion/Sediment Control Narrative In general, all erosion and sedl.ment control measures will be cbecked weekly and after each March 21, 2005 significant rainfall. The following Items will be cbecked in Particular: PROJECT DESCRIPTION 1) The sediment traps and basins will be cleaned and maintained according to the VESCH. The project consists of aonstruction of a road for a rural, large lot subdivision. The total 2) All gravel outlets will be checked regularly for sediment buildup which will prevent disturbance for this site is 3.6 acres. drainage. If the gravel is clogged by sediment, it shall be removed and cleaned or EXISTING SITE CONDITIONS replaced. Oppen rolling field that drains to streams on either side of the proposed roadway. 3) Silt fence will be checked regularly for undermining or deterioration of the fabric and AbJACENT PROPERTY The road enters the project from state route 20 to the west. The rest of the pro arty is by 35-17, 35-16, 35-25A, 35-25, 35-222, 35-1613 8 35-26b. repaired as required. Sediment shall be removed when the level of sediment deposition reaches half way to the top o)f the barrier. surrounded rural parcels: 4) All seeded areas will be, checked regularly to see that a good stand is maintained. Areas OFFSITE AREAS should be, fertilized and reseeded as needed. No off -site areas will be disturbed. MS-1 Stabilization of Denuded Areas and Soil Stockpiles SOILS The entrance road begins in Cbewolca Silt Loam (16) then runs through Permanent or temporary soil stabilization must be opprod to denuded areas within seven days after final grade is reached on any portion of the site. Temporary soil stabilization shall Catoctin Silt Loam (12D), Meyerville, Silt Loam (552A Fauquir Silt Loam (252)), be applied within seven days to denuded areas that may not be at final grade, but will Meersville Silt Loam (58C). Catoctin Very Stoney Silt Loam (13C) and cul-de-saes in RobYum Clay Loam (71D). remain dormant (undisturbed) fior longer than 30 days. Permanent stabilization shall be applied to areas that are to be left dormant for more than one year. Soil stabilization refers to meiasure wbich protect soil from the erosive forces of raindrop CRITICAL EROSION AREAS. impact and flowing water. Applicable practices include vegetative establishment, mulching, There are no critical erosion areas. and the early application of gravel base on areas to be paved. Soil stabilization measures should be selected to be appropriate for the time of year, site conditions and estimated EROSION AND SEDIMENT CONTROL MEASURES duration of use. Unless otherwise indicated, all vegetative and structural erosion and sediment control MS-4 Timing and stabilization, of Sediment Trapping Measures practices will be constructed and maintained according to minimum standards and Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to specifications of the Virginia Erosion and Sediment Control Handbook (VESCH). troy sediment shall be constructed as a first step in any land -disturbing activity and shall STRUCTURAL PRACTICES be made functional before up -:slope land disturbance takes place. 1. Construction Entrance- 3.02 MS- 5 Stabilization Measures A temporary paved construction entrance shall be installed at the beginning of the project. Stabilization measures shall be op lied to earthen structures such as dams, dikes and 2. Silt Fence- 3.05 diversions immediately after installation. A temporary sediment barrier consisting of a synthetic filter fabric stretched across and MS- 17 Vehicle Access attached to supporting posts and entrenched. Where construction vehicle acicess routes intersect paved public roads, provisions shall be, 3. Culvert Inlet Protection- 3.06 made to minimize the transporlt of sediment by (vehicular) tracking onto the paved surface. A temporary sediment filter located at the inlet to culverts. Where sediment is transported onto a public road surface, the road shall be cleaned 4. Temporary Sediment Trap - 3.13 A small ponding area, formed by construction on earthen embankment with a stone outlet thoroughly at the end of each day. Sediment shall be removed from the roads by shoveling or sweeping and transported to ai sediment control disposal area. Street washing shall be, across a drainage swole. 5. Temporary Sediment 2)asin - 3.14 P / allowed only after sediment is removed in this manner. This provision shall apply to lots A temporary barrier or dam with a controlled stormwater release structure formed by individual subdivision as well as to larger land disturbing activities. MS-18 Disposition of Temporary Measures constructing an embankment of compacted soil across a drainageway. The purpose is to detain All temporary erosion and sediment control measures shall be removed within 30 days after sediment -laden runoff from disturbed areas in .wet. and .dry. storage long enough for the final site stabilization or after the temporary measures are no longer needed, unless majority of the sediment to settle out. otherwise authorized by the loical program administrator. Trapped sediment and the disturbed VEGETATIVE PRACTICES 1. Temporary Seeding - 3.31 soil areas resulting from the disposition of temporary measures shall be permanently to Establishment of temporary vegetative cover on disturbed areas by seeding with apprapriote rapidly growing plants on sites that will not be brought to final grade for pperiods of 30 stabilized prevent further erosion and sedimentation. days to one year. German Millet at 60 lb./ac., Weeping Lovegrass at 3 )b./ac., Korean ANTI VORTEX DEVICE DESIGN Lespedeza at 20 lb./ac. Temporary seeding shall be, fertilized. Fertilizer shall be, applied at a rate of 600 Ibs/acre of 10-ZO-10 according to the handbook. The builder may save considerable funds by having the soil tested by VA TECH (kits are available at the extension office and the test PRESSURE RELIEF costs $6.00). HOLES 1/2" OIA. 2. Mulch - 3.35 O O O Organic mulch shall be used in conjunction with seeding operations and shall be, applied at the rate of 2 tons/acre. A A 3. Dust Control- 3.39 TOP IS 14 GAGE CORRUGATED Dust control Measures shall be utilized throughout this site when necessary. Typical O O METAL OR 1/6" STEEL PLATE. temporary measures include but are not limited to, irrigation, temporary seeding barriers. PRESSURE RELIEF HOLES MAY These measures will aid in the prevention of harmful airborne substances as well the effects BE OMMITED, IF ENDS OF of wind erosion. CORRUGATIONS ARE LEFT FULLY MANAGEMENT STRATEGIES O O O O OPEN WHEN THE TOP IS ATTACHED. 1. Construction should be sequenced so that grading operations can begin and and as quickly as possible. P 2. Sediment trapping measures shall be installed as a first step in grading and shall be CYLINDER IS 16 GAGE CORRU- GATED METAL PIPE OR FABRI- seeded and mulobed immediately following installation. PLAN VIEW CATED FROM 1/6" 3. The fob superintendent shall be responsible for the installation and maintenance of all STEEL PLATE. erosion and sediment control practices. 4. Temporary seeding or other stabilization will follow immediately after grading.-t8' WEB Eo NOTES: TACKWELD -TRASH RACK EMERGENCY SPILLWAY 1 F� ENGINEERED SELECTED FILL PLACED IN LAYERS AND COMPACTED -1 I I1 I I III=1 I w EMBANKMENT STABILIZED WITH VEGETATION FREEBOARD 1 FT MIN SPILLWAY BARREL STABILIZED 1_ OUTLET, 35'21'CMID -III I „�IIIIIIII ill�Illlllllll'�IIIIIIIII I1111IIIIIIII�1. 5'xIB" CONCRETE BASE 2 4x4' ANTI -SEEP COLLARS SEDIMENT BASIN 5. Areas whicb are not to be disturbed will be clearly marked by flags, signs, etc. ALL AROUND > 1. THE CYLINDER MUST BE PERMANENT STA&LIZATION 15 FIRMLY FASTENED TO THE All areas disturbed by construction will be stabilized with permanent seeding Immediately TOP of THE RISER. following finish grading. Seeding will be done with Kentucky 31 Tall Fescue according to 8" MIN. Std. 9 Spec. 3.32 of The Virginia Erosion L Sediment Control Handbook. 5-20-10 fertilizer 2. SUPPORT BARS ARE WELDED shall be, applied at the rate of 1000 Ib/ac and lime at 2 tons/ac. Permanently seeded areas #6 X 12" TO THE TOP OF THE RISER SPACER BAR OR ATTACHED BY STRAPS shall be protected during establishment with straw mulcb (2 tons/ac). ITYPICAL} SUPPORT BAR SIZE BOLTED TO THE TOP STORMWATER MANAGEMENT of RISER. This is a rural subdivision with negligible change in stormwater peak flows. The small 30" #8 Rebar amount of impervious area relative to the size of the parcel coupled with the fact that the site is an other rural area' mean no permanent water quality controls are required. Silt Trap #3 SECTION A -A ISOMETRIC Drainage Area (ac): 0.23 Wet Storage Req (cy): 15.41 Dry Storage Req (cy): 15.41 i Silt Trap #2 Total Storage Req (cy): 30.82 \ Drainage Area (ac): 2.13 Elev Side 1 Side 2 Area Vol Vol - Wet Storage Req (cy): 142.71 \ S Dry Storage Req (cy): 142.71 (sf) (Cf) (cy) - - - - - - _ - \\ gyp\ Total Storage Req (cy) : 2B5.42 Low Point 470.0 6 6 36.0 - - - - - 510 - - - 1: 1 side slope _ _ __ _ _ _ _ \ Elev Side 1 Side 2 Area Vol Vol Bottom of Weir: 474.0 14 14 196.0 464.0 17.2 wet / -- - - \� \' (sf) (cf) (cy) 3: 1 side slope i �:- __ _ _ _ ___\ ti� Low Point. 497.0 50 14 700.0 Top of Weir 475.5 20 20 400.0 447.0 16.E dry BottomdofsloWepr: 501.0 55 22 1276.0 3952.0 146.4 wet Weir Length (ft): 1.4 // // / / / �`> / r; \ --r b \ 3: 1 s9.de slope Weir Height (ft) : 1.5 / / / / / / / ��1`-- _ ;\ ' - \ T Top of WEir 503.3 67.2 31.2 2096.E 3878.5 143.E dry Top of Berm: 476.5 / ; ; / / �, \ th (ft) : 12. 8 Top of Weir: 475.5 / / / _ \ �,. �. Weir Lena / i / / / / + .. �__ _ \ \ \ Weir Height (ft) : 2.3 Berm Width (ft) : 2.5 ; j / / Top of B,,rm: 504.3 Top of Weir: 503.3 1 i / / '(� ✓ / l //y'y,- - -= + ` 51 + Berm Width (ft) : 2.5 FI P , i/ //' �' �2°"I6 dT / // v3 Ag, Silt Trap #1 �J I i / / / // i ' D �22 J / l '` 69 ' _ - _ Drainage Area (ac) : 2.55 / 3x S A•� I`'' / 0 520 - d \ \ ` o Wet Storage Re (cy): 170.85 ' / �• D �20 �' / �l Dry Storage Req (cy) : 170.85 Total Storage Req (cy) : 341.70 + o 0 0 9 \ m \02 / Elev Side 1 Side 2 Ar Low Point 510.0 30 30 90 1: 1 side slope VO \ \ \ \ \ / Bottom of Weir: 514.0 38 38 144 3: 1 side slope \ A./ / ! Top of Weir 516.5 48 48 23 t C I P , 9°�� \ o \ \!\ \ ' I Weir Length (ft) : 15.3 / \�• L \ \ _ ' Weir Height (ft) : 2.5 Top of Weir: 51 Top of Berm: 517.5 oom \ �g \ \� n . ! ! ` / \ Berm Width (ft) : 33.0 0 I cc • �' hYI�' ! / / / / Are VICINITY MAP 44 /? BURNLEY FMgA<6, Co 20 C0 641 641 777 640 SITE 20 SCALE: 1" = 1+/- MILE GENERAL EROSION AND SEDIMENT CONTROL NOTES ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND 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 ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION. ES-3: ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE 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 INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION 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 ACTIVITIES AND DURING SITE DEVELPMENT UNTIL FINAL STABILIZATION IS ACHIEVED. ES-8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED 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 IMMEDIATELY. The developer shall reserve the right to install, maintain, remove and/or convert to permanent structure all erosion and sediment control measures required by this plan regorless of the sale of any lot. 0 4 �1 Vol Vol .0 y f) (cf) (Cy) .0 4668.0 173.6 wet + \\ i 04. 0 4685.0 173.5 dry \\ \ \ j \� LU S T/ LIMITS OF.DISTUR�ANdE � o ~ I pl I cc/ ,.I I I I I I I I I I I ='I .� / I � I I II H \ � ~ \ \ o III a \ \ III (j \ - \ \ �\ \ \i I L- CIP Silt Trap !\\` \ j o / + + - Drainage Area (ac) : 42.455 . 5 RECOMMENDED DEWATERING \�\ \ \ ��+ /s Wet storage Req (cy): 16.1PROVIDE ADEDUATE Dry Storage Req (cy) : 164.15 \ \ Total Storage Req (cy): 328.30 STRAPPING SYSTEM FOR SEDIMENT Elev Side 1 Side 2 Area Vol Vol \ i o \ + * \ / J T / + BASINS \� \ \ o / 29/' 27 17' (sf) (Cf) (Cy) POLYETHYLENE ENE CAP -r' ` ' ,p r 2�0:°'o ( + ' Low Point 468.0 24 35 840.0 \ Np '� i / A# �e 1: 1 side slope 510 . 0 \ / 1 * �I �� / / 1 I ! Bottom of Weir: 472.0 32 43 1376.0 4432.0 164.1 wet 3: 1 side slope l l Y , y I / J Top of Weir 475.0 44 55 2420.0 5694.0 210.9 dry l/' + Weir Length (ft) : NA (horseshoe) Weir Height (ft) : 3.0 ' i L Top of Berm: na PERFORATED POLYETHYLENEX / I Top of Weir: 475.0 DRAINAGE TUBING, 10'' DIAMETE r / Berm Width (ft) : na DITCH SECTION A -A USE SIDE SLOP OF EXISTING CHANNEL MODIFIED EC-1 CLASS 1 DETAIL A B -10 1 6' - - - - - A B B SECTION B-B 2' DEPTH LGEOTEXTILE FABRIC i + 506. 4' "YA -STYLE" COUPLING WET STORAGE .\ I 8" DENATERING ORIFICE, SCHEDULE 40 STEEL STUB 1-FOOT MIN.-` UUHHUbAIEU MEIAL HISEH J / ' -- XDRA I NAGS TUBING SHALL- COMPLY WITH ASTM F667 AND AASHTO M294 4S� "u�mitt yT3e Reviewed and Approve by thO c)r pity L)0,v 9clpment Dep ftffl nt ate. _6-_-1 Zo C File#~ '10 /I E&SC LEGEND _ E&SC STD- IS SPEC CE TEMP. STONE CONST. ENTRANCE 3.02 SF SILT FENCE 3.05 CIP CULVERT INLET PROTECTION 3.08 DO TEMPORARY DIVERSION DIKE 3.09 ST TEMPORARY SEDIMENT TRAP 3.13 TSD TEMPORARY SLOPE DRAIN 3.15 OP OUTLET PROTECTION 3.18 CD ROCK CHECK DAMS 3.20 LS LEVEL SPREADER 3.21 TO TOPSOILING 3.30 TS TEMPORARY SEEDING 3.31 PS PERMANENT SEEDING 3.32 SO SODDING 3.33 MU MULCHING 3.35 B/M SOIL STABILIZATION BLANKETS/MATTING 3.36 DC DUST CONTROL 3.39 GRAPHIC SCALE 1''=60' 0 60 120 180 tj W. THOMA\ MUNCAS ER, JR. C-3 CERT. NO, 16242 C rn m m m m o aD N N m CD C- 4 o 0 cn m o ti w 0 m Z Z 0 LIJ z u� w m a N � Q m L E O E o n U N W N � Q 0 z Q j� Q � 77 C J Z �� �C-D I n LU U _J Er O n Q )� W I Q � �D O HCD LmmF) U l'l W z EL 0 O w CIS U cn m X Q Q W DESIGNED BY DATE TM 3/25/05 DRAWN BY DATE TM 3/25/05 CHECKED BY DATE FILE EDIT kady - SCALE DRAWING 1: 1 PLOT PROJECT 947BG OF 1 SHEET NO. LU S T/ LIMITS OF.DISTUR�ANdE � o ~ I pl I cc/ ,.I I I I I I I I I I I ='I .� / I � I I II H \ � ~ \ \ o III a \ \ III (j \ - \ \ �\ \ \i I L- CIP Silt Trap !\\` \ j o / + + - Drainage Area (ac) : 42.455 . 5 RECOMMENDED DEWATERING \�\ \ \ ��+ /s Wet storage Req (cy): 16.1PROVIDE ADEDUATE Dry Storage Req (cy) : 164.15 \ \ Total Storage Req (cy): 328.30 STRAPPING SYSTEM FOR SEDIMENT Elev Side 1 Side 2 Area Vol Vol \ i o \ + * \ / J T / + BASINS \� \ \ o / 29/' 27 17' (sf) (Cf) (Cy) POLYETHYLENE ENE CAP -r' ` ' ,p r 2�0:°'o ( + ' Low Point 468.0 24 35 840.0 \ Np '� i / A# �e 1: 1 side slope 510 . 0 \ / 1 * �I �� / / 1 I ! Bottom of Weir: 472.0 32 43 1376.0 4432.0 164.1 wet 3: 1 side slope l l Y , y I / J Top of Weir 475.0 44 55 2420.0 5694.0 210.9 dry l/' + Weir Length (ft) : NA (horseshoe) Weir Height (ft) : 3.0 ' i L Top of Berm: na PERFORATED POLYETHYLENEX / I Top of Weir: 475.0 DRAINAGE TUBING, 10'' DIAMETE r / Berm Width (ft) : na DITCH SECTION A -A USE SIDE SLOP OF EXISTING CHANNEL MODIFIED EC-1 CLASS 1 DETAIL A B -10 1 6' - - - - - A B B SECTION B-B 2' DEPTH LGEOTEXTILE FABRIC i + 506. 4' "YA -STYLE" COUPLING WET STORAGE .\ I 8" DENATERING ORIFICE, SCHEDULE 40 STEEL STUB 1-FOOT MIN.-` UUHHUbAIEU MEIAL HISEH J / ' -- XDRA I NAGS TUBING SHALL- COMPLY WITH ASTM F667 AND AASHTO M294 4S� "u�mitt yT3e Reviewed and Approve by thO c)r pity L)0,v 9clpment Dep ftffl nt ate. _6-_-1 Zo C File#~ '10 /I E&SC LEGEND _ E&SC STD- IS SPEC CE TEMP. STONE CONST. ENTRANCE 3.02 SF SILT FENCE 3.05 CIP CULVERT INLET PROTECTION 3.08 DO TEMPORARY DIVERSION DIKE 3.09 ST TEMPORARY SEDIMENT TRAP 3.13 TSD TEMPORARY SLOPE DRAIN 3.15 OP OUTLET PROTECTION 3.18 CD ROCK CHECK DAMS 3.20 LS LEVEL SPREADER 3.21 TO TOPSOILING 3.30 TS TEMPORARY SEEDING 3.31 PS PERMANENT SEEDING 3.32 SO SODDING 3.33 MU MULCHING 3.35 B/M SOIL STABILIZATION BLANKETS/MATTING 3.36 DC DUST CONTROL 3.39 GRAPHIC SCALE 1''=60' 0 60 120 180 tj W. THOMA\ MUNCAS ER, JR. C-3 CERT. NO, 16242 C rn m m m m o aD N N m CD C- 4 o 0 cn m o ti w 0 m Z Z 0 LIJ z u� w m a N � Q m L E O E o n U N W N � Q 0 z Q j� Q � 77 C J Z �� �C-D I n LU U _J Er O n Q )� W I Q � �D O HCD LmmF) U l'l W z EL 0 O w CIS U cn m X Q Q W DESIGNED BY DATE TM 3/25/05 DRAWN BY DATE TM 3/25/05 CHECKED BY DATE FILE EDIT kady - SCALE DRAWING 1: 1 PLOT PROJECT 947BG OF 1 SHEET NO. GRAPHIC SCALE 1''=60' 0 60 120 180 tj W. THOMA\ MUNCAS ER, JR. C-3 CERT. NO, 16242 C rn m m m m o aD N N m CD C- 4 o 0 cn m o ti w 0 m Z Z 0 LIJ z u� w m a N � Q m L E O E o n U N W N � Q 0 z Q j� Q � 77 C J Z �� �C-D I n LU U _J Er O n Q )� W I Q � �D O HCD LmmF) U l'l W z EL 0 O w CIS U cn m X Q Q W DESIGNED BY DATE TM 3/25/05 DRAWN BY DATE TM 3/25/05 CHECKED BY DATE FILE EDIT kady - SCALE DRAWING 1: 1 PLOT PROJECT 947BG OF 1 SHEET NO. w 0 m Z Z 0 LIJ z u� w m a N � Q m L E O E o n U N W N � Q 0 z Q j� Q � 77 C J Z �� �C-D I n LU U _J Er O n Q )� W I Q � �D O HCD LmmF) U l'l W z EL 0 O w CIS U cn m X Q Q W DESIGNED BY DATE TM 3/25/05 DRAWN BY DATE TM 3/25/05 CHECKED BY DATE FILE EDIT kady - SCALE DRAWING 1: 1 PLOT PROJECT 947BG OF 1 SHEET NO. Q j� Q � 77 C J Z �� �C-D I n LU U _J Er O n Q )� W I Q � �D O HCD LmmF) U l'l W z EL 0 O w CIS U cn m X Q Q W DESIGNED BY DATE TM 3/25/05 DRAWN BY DATE TM 3/25/05 CHECKED BY DATE FILE EDIT kady - SCALE DRAWING 1: 1 PLOT PROJECT 947BG OF 1 SHEET NO. DESIGNED BY DATE TM 3/25/05 DRAWN BY DATE TM 3/25/05 CHECKED BY DATE FILE EDIT kady - SCALE DRAWING 1: 1 PLOT PROJECT 947BG OF 1 SHEET NO.