HomeMy WebLinkAboutWPO201600004 Plan - VSMP 2016-04-18i
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GENERAL NOTES
OWNER/DEVELOPER: 07600-00-00-05200 07600-00-00-052NO
FORGE FARM, LLC JOSHUA OR MALLORY WHITE
195 RIVERBEND DRIVE 1179 SUNSET AVENUE EXTENDED
CHARLOTTESVILLE, VA 22911 CHARLOTTESVILLE, VA 229903
ENGINEER: COLLINS ENGINEERING
200 GARRETT ST, SUITE K
CHARLOTTESVILLE, VA 22902
(434)293-3719
TAX MAP NO.: 07600-00-00-05200 (D.B. 4568, PG. 582)
07600-00-00-052NO (D.B. 4391, PG. 463)
PROJECT AREA: 10.40 AC
ZONING. • R-4 RESIDENTIAL, ENTRANCE CORRIDOR (ARB APPROVAL REQUIRED)
DENSITY R-4 ALLOWABLE DENSITY FOR STANDARD LEVEL
CLUSTER DEVELOPMENT: 4 D.U./AC.
PROPOSED BONUS DENSITY • 5X INCREASE FOR MAINTAINING OVER 1OX
OF THE EXIS77NG TREES ON 77-IE PROPERTY.
4 UNITS/ACRE x 1.05X BONUS INCREASE = 4.2 UNITS/ACRE
ALLOWABLE UNITS = 4.2 UNITS/ACRE • 10.40 ACRES = 43.7 UNITS
PROPOSED -DENSITY.
SINGLE FAMILY DETACHED: 19
SINGLE FAMILY ATTACHED• 23
TOTAL PROPOSED LOTS. • 42
R-4 DENSITY 42 D. U./10.40 AC. = 4.04 D. U./AC.
OPEN SPACE 3.96 AC (38.1X)
PRESERVED SLOPES. PRESERVED SLOPES EXIST ON THE PROPERTY AND ARE SHOWN ON THIS PLAN.
POR7TONS OF THE COUNTY PRESERVED SLOPES HAVE BEEN FIELD SURVEYED TO VERIFY THE LIMITS OF
THE 25X SLOPES IN ALONG THE EDGES OF THE PRESERVED SLOPES. ANY PRESERVED SLOPE AREAS
THAT WERE MODIFIED DURING THE FIELD SURVEY VERIFICATION PROCESS HAVE BEEN BE TREATED AS
:MANAGED SLOPES ON THE PROPERTY.
MANAGED SLOPES. • THE MANAGED SLOPES EXIST ON THE PROPERTY AND ARE SHOWN ON THIS PLAN.
OFT -SITE DISTURBANCE. NO OFFSITE DISTURBANCE IS PROPOSED WITH THIS PLAN. SUNSET AVENUE
EXTENDED SHALL BE UPGRADED WITH THE WINTERGREEN FARM PROJECT.
BUILDING HEIGHTS: MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35 FEET
SETBACKS: FRONT MINIMUM 5' FROM THE R/W AND MAXIMUM 25' FROM R/W
BUILDING SEPARATION: 10'
REAR: MIN. 20' REAR SETBACK, NO MAXIMUM SETBACK
SIDE. NONE (SEE BUILDING SEPARATION)
FRONT LOADED GARAGE.• MIN. 18' FROM R/W
SIDE LOADED GARAGE. MIN. 5' FROM R/W
SUBDIVISION STREETS. CURB & GUTTER
WATERSHED: THIS SITE LIES WITHIN THE MOORES CREEK WATERSHED, WHICH IS NOT A
WATER SUPPLY WATERSHED.
AGRICULTURAL/ FORESTAL DISTRICT NONE
TOPO ck SURVEY. TOPOGRAPHY PROVIDED BY A COMBINA77ON OF ROUDABUSH, GALE AND
ASSOCIATES AND LOUISA AERIAL SURVEYS INC., JANUARY 2014. THE
BOUNDARY LINE INFORMA77ON IS PROVIDED BY ROUDABUSFI, GALE, AND
ASSOCIATES. INFORMATION FIELD VERIFIED BY COLLINS ENGINEERING JUNE
2015.
DATUM: NAD 83
EXISTING VEGETA770N: MAINLY WOODED
LIGHTING: NO LIGHTING IS PROPOSED
PARKING: (2) OFFS7REET PARKING SPACES PER EACH SINGLE FAMILY DETACHED AND
SINGLE FAMILY ATTACHED UNIT.
(1) PARKING SPACE PER 4 SINGLE FAMILY ATTACHED UNITS REQUIRED.
23 SFA/4 = 5.75 (6 PARKING SPACES REQUIRED)
7 ON STREET PARALLEL PARKING SPACES PROPOSED
PHASING: NONE.
PROFFERS: NONE.
BUILDING SITES. • EACH PARCEL CONTAINS A BUILDING SITE THAT COMPLIES WITH THE
REQUIREMENTS OF THE ALBEMARLE COUNTY ZONING ORDINANCE.
BURIAL SITES: NO CEMETERIES WERE FOUND DURING FIELD INVESTIGA77ON OF THE SITE.
STREAM BUFFERS NO STREAM BUFFERS ARE LOCATED ON THIS PROPERTY PER 7HE ALBEMARLE
COUNTY WATER PR07EC77ON ORDINANCE
RECREATIONAL AREAS: A TOT LOT WITH A MINIMUM AREA OF 6,000 SF IS PROPOSED ON THE
PROPERTY. THE REQUIRED AREA FOR THE TOT LOT IS 200 SF x (23
MUL 77—FAMILY UNITS) = 4,600 SF THE MINIMUM TOT LOT AREA IS ACHIEVED
WITH THIS PROPOSED DESIGN. THE TOT LOT SHALL MEET THE MINIMUM
REQUIRED TOT LOT AMEN177ES AS SPECIFIED IN 7HE ALBEMARLE COUNTY
ZONING ORDINANCE.
RETAINING WALLS: RETAINING WALLS ON THE PROPERTY SHALL HAVE A MAXIMUM HEIGHT OF 10'
LANDSCAPING: STREET TREES ARE PROPOSED ALONG THE NEIGHBORHOOD STREETS IN
ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING REQUIREMENTS
TRASH:EACH LOT SHALL HAVE ITS OWN INDIVIDUAL TRASH RECEPTACLE.
IMPERVIOUS AREAS: PROPOSED ROAD WAY- 0.99 AC
PROPOSED SIDEWALKS a25 AC
PROPOSED ATTACHED HOMES: 0.78 AC.
PROPOSED DETACHED HOMES: 0.57 AC,
TOTAL 2.59 AC.
NOTE.- THIS PROJECT IS NOT LOCATED WITHIN A DAM INUNDATION ZONE.
TOTAL AREAS. • (10.40 ACRES ON THE PROPERTY)
OPEN SPACE. • 3.96 ACRES
R/W.' 1.43 ACRES
SUNSET OVERLOOK
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NOTE- AREAS WITHIN PROPOSED STREET RIGHT—OF—WAY AND
AREAS DEPICTED AS OPEN SPACE ON THIS PLAN SHALL BE
DEDICATED TO PUBLIC USE ON THE SUBDIVISION PLAT.
D.B. __. PG. __
LOTS. • 5.01 ACRES
NOTE ALL OPEN SPACE WITHIN THIS PROJECT SHALL BE
OWNED AND MAINTAINED BY THE HOMEOWNERS ASSOCIA77ON
NOTE: THE TOTAL PROPOSED TREE PRESERVA7701V AREA ON
NOTE. OF THE 3.96 ACRES OF OPEN SPACE ON THE THE PROJECT SITE IS 2.52 ACRES (24.2X). TOTAL AREA OF
PROJECT, APPROXIMATELY 2.52 ACRES INCLUDES PRESERVED TREE PRESERVA77ON OUTSIDE OF THE PRESERVED SLOPES IS
SLOPES AND OPEN SPACE DEDICATED FOR STORMWA TER 1.11 ACRES (10.7X).
MANAGEMENT USES.
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WPO PLAN
SAMUEL MILLER DISTRICT
ALBEMARLE COUNTY, VIRGINIA
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OPB,SMCEA
3P AQtES
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SHEET LAYOUT
SCALE: 1" = 100'
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VICINITY MAP
SCALE: 1" = 750'
APPROVED
by the ftemarle County
.';Communky, Development Department
Date
File
by the Albemarle County
Communit b veloprmnt Department
Date 1 i Imo b
file o Pocc Ll
Sheet List Table
Sheet Number
Sheet Title
1
COVER
2
EXISTING CONDITIONS
3
GRADING & DRAINAGE PLAN
4
GRADING & DRAINAGE PLAN
5
EROSION & SEDIMENT CONTROL NARRATIVE & DETAILS
6
EROSION & SEDIMENT CONTROL PLAN PHASE 1
7
EROSION & SEDIMENT CONTROL PLAN PHASE II
8
EROSION & SEDIMENT CONTROL PLAN DETAILS
9
STORMWATER MANAGEMENT PLAN
is
STORMWATER MANAGEMENT PLAN DETAILS
TOTAL SHEETS
LEC
ROADS
EXISTING CULVERT
CULVERT
Q
DROP INLET & STRUCTURE NO.
CURB
CURB & GUTTER
PROPOSED PAVEMENT
EC-3A DITCH
6"
DEPTH OF EC-3A DITCH
EC-2 DITCH
6'
DEPTH OF EC-2 DITCH
EARTH DITCH
DRIVEWAY CULVERT
BENCH MARK
y
CLEARING LIMITS
T
MOT STANDARD STOP SIGN
----zoo—
EXIS77NG CONTOUR
200
PROPOSED CONTOUR
240,55
PROPOSED SPOT ELEVA77ON
�—
78C DENOTES TOP/BACK OF
CURB TAB DENOTES TOP OF
BOX
SCOTT R. COLLIN<
Lie. No. 035791
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SHEET NO. la
LINE BEARING DISTANCE LINE BEARING DISTANCE LINE BEARING DISTANCE-
L1 S18057 42 W 179.68 L16 N22010 24 W 49.80 L31 N26057 27 W 49.52 /
L1. S471718 E 105.00 L17 S47 45 14 W 299.87 L32 N25 43 25 W 142.53
L3 S580
33 08 E 167.27 L18 N2503718 W 20.76 L33 N2304146 W 34.07 /j / /- - /r _ +
L4 S11001'22"W 37.00' L19 N75044'10"E 200.09' L34 N21°03'58"W 32.97' / i / \ / / - -- �� \ SCOTT R. COLLINSZ
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L8 S1302512 W 15.78 L23 N25°2921 W 31.98 L38 N16 2546E 83.00
L9 S64050'49"E 173.4T L24 N27°5D'41"W 37.75' L39 N15040'46"E 84.64' /
L10 S17 4715 W 88.09 L25 N29044 03 W 29.94 L40 N67 1913E 21.69
L11 S64026'55"E 324.89' L26 N31°04'20"W 99.92' L41 N80004'32"E 23.80'
L12 S56047'47"E 197.96' L27 N30037'04"W 60.24' L42 N88006'29"E 28.83' / ! I l t ` f f / / f N' 4
L13 S58°06'15"W 460.68' L28 N29°42'03"W 86.72' L43 S85003'13"E 40.35'
L14 N13030 53 W 70.27 L29 N28043 23 W 57.56 L44 S80°0818 E 59.93
L15 N19°47'07"W 100.1T L30 N27042'12"W 39.82' L45 575°36'22"E 31.54' / \/ \ \ \ \ ` , { k I I l' ' //// w" �_ 1 }� 4t��uj
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TMP NUMBER OWNER ACREAGE ZONING DB/PG \ { \ EXISTING1 ' RWSA \ 1 0
A 07600-00-00-1205G VILLAS AT SOUTHERN RIDGE UNITS OWNERS ASSOC, 13.64AC PRD / �\ 1 Q WATERLINE
/ --
B 07600-00-00-052M0 MONTOYA, REUBEN 0.47 AC R-4 1719/741 E4TING \2" ACSA
C 07600-00-00-052G0 JARVIS,JAMES&10HN 0.78AC R-4 352/269 / \ \ / ' \ - / / P WATERLINE / `�= M } \ \\, O
D 07600-00-00-052HO LUDWIG, DALE 0.86AC R-4 3019/208 i \ \ / ' t! } ! - J i j 1 } �/ \ � ` \ N
E 07600-00-00-052KO THOMAS, WAYNE OR BRUCE OR VIRGINIA COLLIER 2.44 AC R-4 4457/592
F 07600 00 00 052L0 SIDDH, LLC 5.43 AC R-4 4495/584 J o
G 07600-00-00-052A1 LEAKE, GEORGIA M LIFE ESTATE 1.42 AC R-4 1612/076 `� N07E�' 7MP-7-52N�'I�AND P-7,6-�`2 N LL C BINED _ / / / / / u
H 07600-00-00-052A2 LEAKE, DENNY OR YONGNAM 1.80 AC R-4 3741 393 71 OUGH A UBD16;I ON PL T. / , / \ ~ ''� ~ w
07600-00-00-05100 EAST CONGREGATION OF IEHOVAHSWITNESSES 3.58AC R-2 3431/544 \� D.B. _ _ PG. ram_ � ` \ \ ^� / � / l / , � / � � \ O 2 0 _ ' _ / C\
J 07600-00-00-052AO BERGLAND, FRANK 0.72 AC R-4 4429/536 /
I \ \ ` 1 ' / \ / I \ ENCHMARK - TOP OF MANHOLE Boa No. m
K 07600-00-00-052BO AVILA, RAMON & LUX VELASQUEZ URTECHO 0.59 AC R-4 4502/304 \ f I ' `- ` / / / / 1 ELEVATION = 500.52 \ 1 152115
L 07600-00-00-052C0 LAVASSEUR, ROGER 0.63 AC R-4 4443/001 n - / \ / , / a
M 076600-00-00-052DO THOMAS, MAURICE JR 0.44AC R-4 1025]506 ' I �� \. / / �fl � / / �� / / A / SCALE o
N 07 00 00-00-052EO STRATTON, GILBERT BRIAN & STEPHEN SUPPLE 0.45 AC R-4 3483/746 / / \ ! /
O 07600-00-00-052NO WHITE, JASHUA DOWNING OR MALLORY BLACKLEY 0.45 AC R-4 4391/463
P _ 07600-00-00-051BO BEREAN BAPTIST CHURCH ETAL TRUSTEES 4.02 AC R-1 765/194 \� \ \ \ j j / \ / ) J _ `1 SHEET NO. n
Q 07600-00-00-049C0 WINTERGREEN FARM LLC 4.73 AC R-1 4568/559
R 07600-00-00-04960 WINTERGREEN FARM LLC 66.49 AC R-1 4568/559
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GENERAL NOTES
1. THE OWNER/DEVELOPER OF THIS PROPERTY IS.
FORGE FARM, LLC
195 RIVERBEND DRIVE
CHARLOTTESVILLE, VA 22911
2. THESE PLANS HAVE BEEN PREPARED BY•
COLLINS ENGINEERING, INC
200 GARRETT STREET SUITE K
CHARLOTTESVILLE, VA 22902
TELEPHONE.- (434) 293-3719 FACSIMILE.- (434) 293-2813
J. SOURCE OF TOPO & SURVEY. TOPOGRAPHY PROVIDED BY A COMB1NA77ON OF
ROUDABUSH, GALE AND ASSOCIATES AND LOUISA AERIAL SURVEYS INC.,
JANUARY 2014. THE BOUNDARY LINE INFORMATION IS PROVIDED BY
ROUDABUSH, GALE AND ASSOCIATES INFORMATION FIELD VERIFIED BY
COLLINS ENGINEERING JUNE 2015.
4. ZONING. • R-4 RESIDEN77AL
5. TAX MAP AND PARCEL NUMBER:
07600-00-00-05200 & 07600-00-00-052NO
6. USGS DATUM. • NAD 83
7. LOCA770N/ADDRESS OF PROJECT COUNTRY GREEN ROAD & SUNSET AVENUE
EXTENDED
8. PROJECT AREA: 10.40 ACRES
9. SITE PHASING: NONE.
10. PUBLIC UTILITIES., CONNECT TO EXIS77NG PUBLIC SEWER AND WATER
x COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK,
SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND
REGULATIONS. WE SHALL NOT ASSUME RESPONSIBILITY FOR ANY
CONSTRUCTION STARTED PRIOR TO PLAN APPROVAL.
EROSION & SEDIMENT CONTROL
MEASURES:
STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC7CES SHALL BE IN
ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
STRUCTURAL PRACTICES USED /N THIS SECTION CONSIST OF THE FOLLOWING:
A 01 SAFETY FENCE:
A PROTECTIVE 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 P07EN71AL 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
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 THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS.
3.05 SILT FENCE.•
A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SMTHE77C 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 SILr 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).
J,Q7 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 PR07ECT70N APPLIES WHERE S70RM 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 AND SLOPES TO A STABILIZED
AREAS AWAY FROM UNPR0IEC7ED DISTURBED
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 S17E DURING CONSTRUCTION.
A LIFE EXPECTANCY OF 18 MONTHS OR LESS
THESE STRUCTURES GENERALLY HAVE ,
WHICH CAN BE PROLONGED WITH PROPER MAINTENANCE.
A14 TEMPORARY SEDIMENT BASIN:
TEMPORARY BARRIER OR DAM WITH A CONTROLLED S7ORMWATER RELEASE
STRUCTURE FORMED BY CONSIRUC77NG 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 AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A
TEMPORARY IMPOUNDMENT
J. 18 OUTLET PROTECTION.
STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES
PLACED AT THE OUTLET
S OF PIPES OR PAINED CHANNEL SECTIONS. TO PREVENT
SCOUR AT STORMWA7ER OUTLE75, TO PROTECT THE OUTLET STRUCTURE, AND TO
MINIMIZE THE POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING 774E VELOCITY AND
ENERGY OF CONCENTRATED STORMWAIER FLOWS APPLICABLE TO THE OUTLETS OF
ALL PIPES AND ENGINEERED CHANNEL SECTIONS.
J.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 P07EN77AL FOR INFILTRATION, AND TO
STABILIZE SLOPES WITH SEEPAGE PROBLEMS AND/OR NON -COHESIVE SOILS USE
WHEREVER SOIL AND WATER INTERFACE AND THE SOIL CONDITIONS, WATER
TURBULENCE AND VELOCITY, EXPECTED VEGETATVE COVER, ETC., ARE SUCH THAT 774E
SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS
3.31 TEMPORARY SEEDING..
THE ESTABLISHMENT OF A TEMPORARY IECETA77VE 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 -SITE AREAS, AND TO PROVIDE
PR07ECTION TO BARE SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT
VEGETATION OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED.
3.32 PERMANENT STABILIZATION:
THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY
PLAN771VG SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM
DISTURBED AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER
THAT IS ECONOMICAL, ADAPTABLE TO SITE CONDITIONS AND ALLOWS SELECTION OF
THE MOST APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO
ENHANCE NATURAL BEAUTY. UPON COMPLETION OF CONSTRUCTION ACTI147ES ALL
AREAS WILL RECEIVE A PERMANENT VEGETA7VE COVER.
338 TREE PRESERVATION AND PROTEC770N.-
PROTECTION OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND
DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE THE SURVIVAL OF DESIRABLE
TREES WHERE THEY NU. BE EFFECTIVE 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 7REE-INHA8I7ED
AREAS SUBJECT TO LAND DISTURBING ACTIVITIES.
J 39 DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING,
DEMOLITION AND CONSTRUCTION AC77WTIES TO PREVENT SURFACE AND AIR
MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF
AIRBORNE SUBSTANCES WHICH MAY PRESENT HEAL7H HAZARDS, 7RAFRC 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 VESCI4.
EROSION 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
714E 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 DIS77JRBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
MEASURES AT ALL 77MES DURING LAND DISTURBING ACTIVITIES AND DURING
S17E DEVELOPMENT UN77L FINAL STABILIZATION IS ACHIEVED.
ES-8.-DURING D£WATERING 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 EFFEC77WNESS
OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
EROSION CONTROL NOTES
1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE
PRE-CONSTRUC77ON 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 SPECIFICA77ONS OF THE VIRGINIA EROSION AND
SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND
SEDIMENT CONTROL REGULATIONS.
J. 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 AND SEDIMENT CONTROL PLAN SHALL BE
MAINTAINED ON THE S17E AT ALL 77MES
5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS 0774ER THAN INDICATED
ON THESE PLANS (INCLUDING, BUT NOT LIMI7ED 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 77MES DURING LAND DISTURBING ACTIVITIES AND DURING S17E DEVELOPMENT UN77L
FINAL STABILIZATION IS ACHIEVED.
S. DURING DEW47ERING OPERATIONS WATER WILL BE PUMPED INTO AN APPROVED FILTERING
DEVICE.
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
10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA.
11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL
SHALL BE INERT MA7ERIALS ONLY, FREE OF 1?0075, STUMPS, WOOD, RUBBISH, AND 07HER
DEBRIS.
12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLE77ON PER
ZONING ORDINANCE SEC77ON 6.1.28.
13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF
THE CODE OF ALBEMARLE.
14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL
BE LIMITED TO THE HOURS OF 7.•OOAM TO 9:OOPM.
15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN
MAINTAINS LA7ERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS
PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY
PUBLIC STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE
16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT
TO PERMANENT STORMW47ER 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.
77. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO
BE AT 75 LBS/ACRE, AND IN 774E MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A
M
MI OF Ah./UAL RYEGRASS AND CEREAL
50 50 X E L WINTER RYE OR IN MARCH AND A l 70 / N PRL
CONSIST OF ANNUti.'_ RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET.
MULCH /S TO BE APPLIED AT 8 STRAW OLBS 100SF. ALTERNATIVES ARE SUBJECT
TO
APPROVED BY THE COUNTY ERGS/ON CONTROL INSPECTOR.
18. PERMANENT STABILJZA77ON SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING AND
AGRICULTURAL GRADE LIMESTO
NE ONE SHALL BE APPLIED AT 90L8S/1000SF,
INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT
1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL
BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND
0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED
AT 8OLB5`1lO0SF. ALTERNATIVES 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 15 TO BE REPAIR
IMMEDIATELY. SILT TRAPS ARE TO 8E CLEANED WHEN 50% OF THE WET STORAGE VOLUME
IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY
TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE
COLLEC77NG SEDIMENT TO HALF 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 LONGER 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 PR07EC77ON ORDINANCE SEC77ON 17-204G)
PERMANENT WGETA77ON SHALL BE INSTALLED
22. P ON ALL DENUDED AREAS WITHIN NINE 9
()
MONTHS AFTER THE DATE THE LAND DISTURBING AC770TY COMMENCED. (WATER
PR07EC77ON ORDINANCE SECT70N 17-2075)
SOIL DESCRIPTION
21B - CULPEPER FINE SANDY LOAM -2% TO 7% SLOPES. SOIL IS WELL
DRAINED, WITH MORE THAN 80 INCHES TO THE WATER TABLE MADE
FROM RESIDUUM WEATHERED FROM META-ARKOSIC SANDSTONE AND
QUAR72/7E; THIS SOIL HAS CONVEX DOWN -SLOPE AND CONVEX
ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR FLOODING AND
VERU LOW TO HIGH KSAT.
27B - ELIOAK LOAM-2% TO 7% SLOPES. SOIL IS WELL DRAINED, WITH MORE
THAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM MICA SCHIST 77-IIS SOIL HAS CONVEX DOWN -SLOPE
AND CONVEX ACROSS -SLOPE SHAPE. NO FREOUENCY OF PONDING OR
FLOODING, HIGH WATER CAPACITY. AND MODERATELY HIGH TO HIGH KSAT
27C - EL/OAK LOAM-79 TO 15Z SLOPES SOIL IS WELL DRAINED, WITH MORE
THAN 80 INCHES TO 774E WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM MICA SCHIST, THIS SOIL HAS CONVEX DOWN -SLOPE
AND CONVEX ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR
FLOODING, HIGH WATER CAPACITY, AND MODERATELY HIGH TO HIGH KSAT.
27D - EL/OAK LOAM-15% TO 25Z SLOPES. SOIL /S WELL DRAINED, WITH MORE
THAN 80 INCHES TO THE WATER TABLE. MADE FROM RESIDUUM
WEATHERED FROM MICA SCHIST, 77-I/S SOIL HAS CONVEX DOWN -SLOPE
AND CONVEX ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR
FLOODING, HIGH WATER CAPACITY; AND MODERATELY HIGH TO HIGH KSAT
29B - FAUQUIER SILT LOAM-2% TO 7% SLOPES SOIL IS WELL DRAINED, WITH
MORE THAN 80 INCHES TO THE WATER TABLE. MADE FROM WEATHERED
GREENSTONE, THIS SOIL HAS CONVEX DOWN -SLOPE AND CONVEX
ACROSS -SLOPE SHAPE. NO FREQUENCY OF PONDING OR FLOODING, HIGH
WATER CAPACITY, AND VERY LOW TO HIGH KSAT
39D - HAZEL LOAM-15% TO 259 SLOPES. SOIL IS EXCESSIVELY DRAINED, WITH
MORE THAN 80 INCHES TO 774E WATER TABLE. MADE FROM RESIDUUM
KE47HERED GRAYWACKE SANDSTONE AND MICA SCHIST, THIS SOIL HAS
CONVEX DOWN -SLOPE AND CONVEX ACROSS -SLOPE SHAPE. NO
FREQUENCY OF PONDING OR FLOODING, AND MODERATELY HIGH TO HIGH
KSAT.
DESCRIPTION OF EROSION & SEDIMENT
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES_
IT IS ANTICIPATED THAT A CONSTRUCTION ENTRANCE, TEMPORARY DIVERSION
BERMS RIGHT OF WAY DIVERSION, A SEDIMENT BASIN, OUTLET PRO TECT7ON,
INLET PROTECTION, AND SILT FENCE 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 THAT WILL BE STRIPPED FROM AREAS TO BE GRADED
AND STORED FOR LATER SPREADING. STOCKPILE LOCA77ONS SHALL BE ON SITE
AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE 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. THESE AREAS SHALL BE SEEDED WITH FAST GERA41NA77NG
VEGETAT70N IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS SELECT70N OF
SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED.
3.01 SAFETY FENCE - SAFETY FENCE WILL BE INSTALLED AROUND THE
PROPOSED SEDIMENT BASIN.
3.02 CONSTRUCTION ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE
INSTALLED AT SUNSET AVENUE EXTENDED. THIS WILL BE THE ONLY POINT OF
INGRESS AND EGRESS TO THE SITE. CARE WILL BE TAKEN TO PROTECT
ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT.
3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF
DISTURBANCE WHERE N07ED ON THE PLANS.
3.07 STORM DRAIN INLET PROTECTION- IP WILL BE INSTALLED ON EACH
PROPOSED INLET AS SHOWN ON THE PLANS
3.09 TEMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND THE
PERIMETER OF S17E DISTURBANCE WHERE SHOWN ON THE PLANS TO DIRECT
RUNOFF TO ON -SITE SEDIMENT CONTROL FACILITIES
3.14 TEMPORARY SEDIMENT BASIN- TEMPORARY SEDIMENT BASINS WILL BE
INSTALLED WHERE SHOWN ON THE PLANS
3.18 OUTLET PRO7EC7ON- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE
PIPES WHERE SHOWN ON PLANS.
3.19 RIPRAP- RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE
SHOWN ON THE PLANS
3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE
SHOWN ON THE PLANS.
3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE
SHOWN ON THE PLANS
338 TREE PRESERVA7ON AND PROTECTION- TREE PRESERVATION FENCING
SHALL BE INSTALLED WHERE SHOWN ON THE PLANS. NO TREES SHALL BE
HARMED OUTSIDE OF THE LIMITS OF TREE PROTECTON FENCING.
3.39 DUST CONTROL- DUST CONTROL SHALL BE APPLIED THROUGHOUT THE SITE
WHERE SHOWN DN THE PLANS
STORMWATER MANAGEMENT.•
STORMWA7ER RUNOFF QUANTITY WILL BE TREATED WITH TWO LEVEL I
BIORE7EN77ON BASINS WITH DOWNSTREAM DETENTION. SEF STORMWATER
MANAGEMENT PLAN SHEETS.
MAINTENANCE.
IN GENERAL, DURING CONSTRUCTION 774E RLD OR CONTRACTOR ON -SIZE WILL CHECK
ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH
SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD /F
NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS:
a. SEDIMENT BASINS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WI774 THE
VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK.
6.ALL INLET PROTECTION AND GRAVEL OU7ETS WILL BE CHECKED REGULARLY FOR
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS
CLOGGED BY SEDIMENT THE GRAVEL WILL BE REMOVE") AND CLEANED, OR IT WILL
BE REPLACED.
a 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 DEPOSITION RE SEDIMENT ACHED 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 FER77LIZED AND RESEEDED AS NEEDED.
IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD
OR CONTRACTOR ON -SITE. THE CONTRACTOR WILL BE DETERMINED AT THE 77ME THE
CONTRACT IS AWARDED. IN ADDITION 774E DEVELOPER MAY BE CONTACTED. UPON
COMPLE77ON OF THE PROJECT; THE OWNER WILL BE RESPONSIBLE FOR S17E
MAINTENANCE.
TABLE 3,31-B
ACCEPTABLE TEMPORARY SEEDING PLANT MATERIALS
-QUICK REFERENCE FOR ALL REGIONS'
Rate
Plant
in, Dates tltrs./.=c7
Sept. 1 - Feb. 15 50150 Mix of
Annual Ryegnm
(Wium multi-tlorum)
& 50 - 100
Cereal (Winter) Rye
($prate cerew
Feb.10 - Apr. 30 Annual Ryegrase 0 • 100
(Loliummultiflam)
May-1- Avg 31 German Millet 50
fzlyait"
Va. DSWC
7(W
r
*musxextl:,aPAL wsm
or Arta ?GW
E
SEGitf}N A -A
A®nhaaw rTatc tap ofltmbn bezwt'W vrOsgfm lmchbWko&
al�n9tv#rstyylling a w� 4ose wibra �mceaoTl a dsbn far
PAVED WASH RACK
.C.erlxi,c�M.lprxe�ae Wa�wd�.gWtbtc#erd tlY$5",$Our�VaG7e.�kCWia
^gF'>"_@1�i85le Tbra:Pe E{(�..il($ab! g4311:
eWninserum driaa. �[lxs ar. Aaiermlraea.
NO SeB.F
EROSION CONTROL NOTES & NARRATIVE
THE PURPOSE OF THIS LAND -DISTURBING ACTIVITY IS TO CREATE THE ROADWAY, TOWNHOMES, PARKING, AND
LOTS FOR 774E SUNSET OVERLOOK SUBDIVISION. THE TOTAL ACREAGE TO BE DISTURBED WITH THIS PLAN IS 7.54
ACRES.
EA7S77NG S17E CONDITIONS.•
THE EVS77NG S17E IS A VACANT, WOODED, HILLY PARCEL. AN EXISTING STREAM RUNS TO THE NORTHEAST OF
THE PARCEL. THE S17E IS GENERALLY WELL DRAINED WITH PRESERVED AND MANAGED STEEP SLOPES EROSION
AND SEDIMENT CONTROL MEASURES HAVE BEEN DESIGNED TO CONFORM TO THE EXIS77NG S17E SLOPE AND
PROTECT THE PERIMETER STREAMS AND ADJACENT PROPER77ES
ADJACENT AREAS.
THE SITE IS POSITIONED SOUTH OF COUNTRY GREEN ROAD AND EAST OF SUNSET AVENUE EXTENDED AND THE
WINTERGREEN PROJECT IT 1S BORDERED BY EXIS77NG RESIDENCES TO THE EAST AND OLD LYCHBURG ROAD TO
THE SOUTH.
OFFSITE LAND DISTURBANCE.
NONE
CRITICAL AREAS:
MANAGED STEEP SLOPES TO BE IMPACTED. STREAMS AND BUFFERS TO BE PROTECTED. WOODLAND
PRESERVATION AREAS TO BE MAINTAINED AND PROTECTED WITH TREE PR07ECTION FENCING.
SOILS•
SEE SOILS BOUNDARIES ON THE EROSION AND SEDIMENT CONTROL PLAN PHASE 1 SHEET, AND DESCRIPTIONS ON
THIS SHEET.
SEQUENCE OF CONSTRUCTION.
1. N077FY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED.
2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
APPROVAL FROM THE INSPECTOR ON THE PROJECT.
J. CONTRACTOR SHALL IDEN77FY THE LIMITS OF DISTURBANCE AND INSTALL TREE PR07EC77ON FENCING WHERE
INDICATED ON THE PLANS BEFORE ANY S17E DISTURBANCE SHALL TAKE PLACE CONTRACTOR SHALL ENSURE
THAT TREES TO BE SAVED ARE FLAGGED ALONG 774E LIMITS OF CLEARING AND PROTECTED.
4. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH RACK AS SHOWN ON THE PLANS. CONSTRUCTION
ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS,
PROVISIONS SHALL BE MADE TO MINIMIZE 774E TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO
774E PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL
BE CLEANED 7HOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY
SHOVELING OR SWEEPING AND TRANSPOR77NG TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING
SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOLD 1N THIS MANNER. INSTALL 774E WASH RACK UPHILL
FROM THE PROPOSED SEDIMENT BASIN. ATSA WILL DETERMINE THE APPROPRIATE METHOD OF SUPPLYING THE
WASH RACK. PARKING AND CONSTRUCTION ENTRANCE AREAS SHALL BE CLEARED OF ALL VEGETATION,
ROOTS, OR OTHER OBJECTIONABLE MATERIALS BEFORE CONSTRUCTION ROAD STABILIZATION IS INSTALLED.
5. CONTRACTOR DOES NOT HAVE PERMISSION TO CLEAR CUT THE S17E PRIOR TO INSTALLING THE PERIMETER
MEASURES AS SHOWN ON THE PHASE I E&S PLAN. CONTRACTOR SHALL EXPEDITE INSTALLATION OF THE
PERIMETER EROSION AND SEDIMENT CONTROL MEASURES AND PROTECT THE S17E WITH THE LEAST AMOUNT
OF TREE REMOVAL NECESSARY TO INSTALL THESE MEASURES INSTALL THE IN177AL CONSTRUCTION
MEASURES AS S14OWN ON THE PHASE I EROSION CONTROL PLAN SHEETS THIS INCLUDES THE SEDIMENT
BASIN, SEDIMENT TRAP, SILT FENCE, AND DIVERSION BERMS. STABILIZATON MEASURES SHALL BE APPLIED
TO EARTHEN STRUCTURES SUCH AS DAMS, BERMS, AND DIVERSIONS IMMEDIATELY AFTER INSTALLATION.
MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP W777-1 ANY LAND
DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES
PLACE.
6. INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN.
7 ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE PHASE I EROSION
CONTROL PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR
CAN BEGIN GRADING OPERATIONS
B. ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE EROSION CONTROL PLAN.
9. PERMANENT OR TEMPORARY SOIL STABILIZA7ION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS
AFTER FINAL GRADE IS REACHED ON ANY POR77ON OF 714E SITE. TEMPORARY SOIL STABILIZATION SHALL BE
APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN
DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS PERMANENT STABILIZATION SHALL BE APPLIED TO
AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
10. ONCE THE SEDIMENT BASIN IS INSTALLED AND DRAINAGE CAN BE POSITIVELY CONVEYED VIA THE PHASE H
DIVERSION DIKE, THE SEDIMENT TRAP CAN BE REMOVED AND THE PROPOSED DIVERSION INSTALLED IN ITS
PLACE. INSTAL! THE CONSTRUCTION MEASURES AS SHOWN ON THE PHASE 9 EROSION CONTROL PLAN
SHEETS. MEAURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY
LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES
PLACE.
11. INSTALL THE UTILITIES, CURB AND GUTTER, AND ROADS. INLET PR07EC77ON SHALL BE INSPECTED AFTER
EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NEEDED. IF THE STONE FILTER BECOMES CLOGGED
WITH SEDIMENT SO THAT IT NO LONGER ADEQUATELY PERFORMS I7S FUNCTION THE STONE MUST BE PULLED
AWAY AND CLEANED AND/OR REPLACED. INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON
THE PHASE ll EROSION CONTROL PLAN.
1Z. ONCE PHASE H OF CONSTRUCT70N IS COMPLETE THE S17E IS STABILIZED AND THE INSPECTOR HAS GIVEN
APPROVAL, 714E CONTRACTOR CAN REMOVE THE SEDIMENT BASIN AND INSTALL THE REMAINING EROSION
CONTROL MEASURES NO ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND
THE INSPECTOR GIVES PERMISSION THE SEDIMENT BASIN HAS BEEN DESIGNED SO THAT THE PROPOSED WALL
SEDIMENT BASIN TO SWM FACILITY.
A E INSTALLED A THE TIME ONVERSION FROM SE M YB S T H EOFC
13. 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.
14. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED M7741N 30 DAYS AFTER
FINAL S17E STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS
OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM 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.
TABLE:3."•A
ADHESIVES USED FOR DUST CONTROL
Water I' tion App>ca
Dilution Type of Rau.
Adh�iuc... (AdbrAi e: Watt_tl G�q/Ac[e
AAn,.ii.o.l1n..i..1c1
A,spbalt Emalsion 71 Co -se. Spray 1,2AD
Latex. Emn3siou 125:1 Fine Spray 235.
Resin. in Water 41.. Fine Spray 300
Aayi c 6malsion
(Non-Traftiq) 7:.1, Coarse spray 450.
Acrylic Emulsion.
(Traffic) 3.51 Coarse Spray 350.
Source:: Va. DSWC
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FENCING ANT? ARMORING
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T TRUNK ARMORING
E 7AKA
WOODEN STAKE
POST
L MOTH - 5• ON
EXCVATED SOIL
AMqLO AND
4 x4 TRENCH
._ CURB INLET
WRE
�GRA VEL* FX 7FR
OR 45 COARSE AGGREGATE
O
BLOCK & GRAVE 8 INLET
I L CUR 7-
SEDIMENT FILTER
0
NO SCALE
Les
feow 22 A 1 aR LRc1_ PER IOW. ACRE
KENTUCKY 31 FESCUE 128 LBS.
RED TOP GRASS 2 LBS.
SEASONAL NURSE CROP 20 LBS.
SEASONAL NURSE CROP 150 LBS
FEBRUARY 16 THROUGH APRIL ANNUAL IYE
MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET
AUGUST 16 THROUGH OCTOBER ANNUAL RYE
NOVEMBER THROUGH FEBRUARY 15 WINTER RYE
NOTES:
1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL
TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32.
2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION
OF SEED APPLICATION, IN ACCORDANCE W/ VESCH STD 3.35.
PS PERMANENT SEEDING SCHEDULE
NO SCALE
(STD. & SPEC. 3.32 OF VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK, 3RD ED.)
SCOTT R. COLLINS
Lie, No. 035791,
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ISTURBANCE \ PHASE I PLAN DISTURBANCE TH 0
= 7.54 ACRES W W W ' LIMITS OF LAND DI SF SILT FENCE PER VESCH 3.05 �l
-71�-' - W i W H-t--�---�- DIVERSION DIKE SS SUPER SILT FENCE PER VESCH 3.05 Q
w 5 BOUNDARYLINE
i_ ` DD DIVERSION DIKE PER VESCH 3.09 > SCOTT R. COLLINS'Z
R ROPOSED` _ = - - _ w -1 S ----' $ ' - - - SILT FENCE O C)
� .. SILT FENCE S F-__._..-_ \ W �',„--.-._.. - TREE PROTECTION ST SEDIMENT TRAP PER VESCH 3,16
' - - - SILT) - � - Uy f DIRECTION OF FLOW UaLic. No. Q35791�
-� -� _'� bV — 653.75— PROPOSED CONTOUR CE CONSTRUCTION ENTRANCE PER VESCH 3.02
/ > TREE PROTECTION T � - - I DRAINAGE DIVIDE ESS 1S
'�-�, VV TP TREE PROTECTION & PRESERVATION PER IONAL E
FENCING (TYPJ
� VESCH 3.38 PR
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INLET PROTECTION OP OUTLET OTECTION PER VESCH 3.18 w CULVE
CIP
w - - - — SOILS LINE 3.08 RT INLET PROTECTION PER VESCH
ROCK CHECK DAMS PER VESCH 3.20
SOIL STABILIZATION MATTING VESCH 3.36
,
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"CONTRACTOR TO ENSURE POSITIVE` _ ( '�
DRAINAGE IN THIS AREA TO ENSURE m
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FLOW ALONG DIVERSION DIKELLJ
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PROPOSED STOLC'�..r1� ,NEOUTFAINT
SEDIMENT BASIN (6'Wx5'Lxz'D)
v� I
/% ,f'`PROPOSED i8" DIVERSION
\_ ( y �\ R P ED STOCKPILE BERM - CONTRACTOR TO / �, / f/Lu
AREA SURROUNDED BY ENSURE POSITIVE DRAINAGE f \ j{
/ TS
SILT FE CE ALONE, BERM
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F I C=20 in. OVERLAND FLOW \ ` \ �� k' \
- /Tc=1.3 min: C NCEN,TRATED FLOW. fl
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,
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PROPOSED '// / -
!SAFETY FENCE.._ ' Lu`=� r
/ / \ F '},. e` 1STURBANCE _ PROPOSED SPILLWAY AND
AM IN FILL SHALL BE ARMORED` CM / r, -i_ ; /. 4 \',`' - WITH RIPRAP AS SHOWN
—� STING\= C�
STREAM � f �
PHASE I _
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3 +s... .:� ,:�:I tarn,• 9a•» �Ri ,«z,�;�ls(„ ice, ,:+ •.a
_ ; Ski % ,� iw,PR POSE SLT (dE0 TFALL INTO `` �� "' . s _, �•. �„�� '`�^ r a dw 4•�, �a � � '+,^r"��' \,
/" / S:,„"`;- a''"'6 � s "'kbbwai'^,pr S°• a5 `'.,;
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/ /� %" .SEDIMENTBASIN(6'Wx5'Lxz'D)
/' /' i f// / /, / - A \ _. � i , r=�A tt - =<:r;. �`'^ r<: ;n,,. A j ,'.,°' q, g' ti• Q m
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;' j ! - > % - � j r � / � � � A /. ! -,„, , � \ r r, ', v,„• ,� ERM -CONTRACTOR TO D I �
NSURE POSITIVE DRAINAGE__---
/
_ I ALONG —
/ v t � �V A AV �� i• r /_ --v , e �;' LO BERM �\v 'rr€ \
/ 1 V /
TR�EPROTECTION� TP Ld �
FENCING (TYP.)
27
� wy 7`� � �' �� ,/� _ � _ _ "�' '"' _ •'.�' -- - ` .v PROPOSEDOSF
AO/ i / ``SILT FENCE\�',J
,
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PROPOSED STAGING AREA VA v� ! \v \ i� k9g
w/PORTAJOHNS RAIN GAUGE �.u�, ' — � \
DUMPSTER, FUELING AREA, AND / I �, f / j 'a - y. .� _ p_ �� W Q
CONCRE EWASHOUTAREA / /. 27C7 DC 1 �� / �1/ .� �_ O W o
/ i.\ \. l ` l\ .-/ S Ml=i�1T TRAP = f j fE l! 1
I Y // i / / 4 \ / / / /` / \ \ 1 ` _//F� A =Z,94 AC TS06
A, ul
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DC WITH jWIRESUPPORT / /< �9 / f.-�/ W Q z
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CONSTRUCTION_ - C� ^) _
ENTRANCE \ ,� J / -� J
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f/� i / /152115
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t \ , / /
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Nov
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50 p 50 � 100 •. 200 S
I in 50 4� /,--
.. , " .. 3• ` :",,i .r:. � - ' , _' `� - _- - -- i� , x 1 `t
Sediment Basin #1 Design
drainage area (acres)
basin Volumes: (using 2' contour intervals)
elevation (ft) contour area (sf)
476.00 6105.0
478.00 7787.0
480.00 9680.0
482-00 11806-0
483.50 13573.0
Wet storage required (cy) (67*DA)
dewatering orifice elevation (ft)
Wet storage provided at this elevation (cy)
available volume before cleanout (cy) (34*DA)
clean outeletiatcn (ft)
distance from cleanout to orifice (ft) (> 1')
dry storage:
dry storage required (cy) (67*DA)
principle spillway crest (ft)
dry storage provided at this elevation (cy)
diameter of dewatering orifice (in)
diameter of flexible tubing (in) (orifice+2")
C (use 0.45 for bare earth)
to (min)
2yr 3.0 Q 2yr
125yr 4.5 Q 25yr
principle spiftww:
available head (ft)
diameter riser (in)
spillway capacity, Qp (cfs)
diameter trash rack (in)
barrel length (ft)
head on barrel through embankment (ft)
diameter of barrel (in)
talNVtK1 AI tLtV.=477.D �\
1 /
--71 BASIN NOTE
7.. `fT FE A PROVED'TRASH RACKS HALL VE INSTALLED ON ALL ORIFICE O PENIN
2. �A CONC ETE FOUNDATI�NI SHALL BE INSTALLED (ON T ISER ASSI4 V N
MEET14G THE MJNIMUM SPECIFI¢ATIONS SET FORTH IN THE V SCHSPEC_#3.24.
CONTRACTOR AND CON$TIRUCTICN SHILL ADHERE TO ALL OSHA REQUIREMENTS-
7 ADDI IONALLY( SPECIALI ATTENTION SHALL BE GIWEN TO THE CONSTRUC-_TION� �J �
/ SH PING ASSOCIATED FJI- TF�BIORET NTION BASIN EXCAVATION.
Lj
MIN. 1'W(SPILLWAY OREST OP VXRGE, 9
2' W'ITHO"T SPLLWAY
7.73
1r
DESIGN HIGH WATER
(2s )P_ MIN ELEV.)
volume (cy)
513.3
MER ORM
- 9Rf • SfOpAE-':"^ir':::::::�': !':
IEFpNG
115&9
1953.4
2657.8
sgxl�rENr cLrnnan yawl
( WET " SIDRAGE REDUCED
i0 GY,/ACRE)
517.8
design high Water (ft)
482.50
478.01
top of dam (ft)
483.50
517.8
top width of dam (ft)
10.0
262.8
bottom of basin (ft)
476.0
477.01
approx. bottom dimensions:
8O'x176
1.0
upstream face slope:
2:1
downstream face slope:
3:1
517.8
baffles:
NO
479.75
length of flow, I- (ft)
184
560.4
effective width, We (ft)
51.32D65
4.0
L I We (baffles not required if > 2)
3.6
&0
collars:
YES
depth of water at spillway crest (ft)
3.75
0.6
slope of upstream face (Z1)
2:1
20
slope of barrel (Sb)
0.5
13.9
length of barrel in saturated zone (is)
22.96
23.0
number collars required
2
dimension of collars
3.IV. 1'
2.5
emergency spillway:
YES
18
required capacity (Q25-Qp) (cfs)
14.0
9.0
bottom width (ft)
80
27
slope of exist channel (fUft)
33
78.0
minimun length of exit channel (ft)
51
13.6
crest of spillway (ft)
482.25
15
Lu >�
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gORIFICE
ACKS TO BE INSTALLED ON ALL ORIF ICES PER
CHNICAL BULLETIN #7
495 COEFFICIENT = 0.6
W2
_
----
--_--
PROP -
SED 01 -
1 CL III R
P
490
\
RISER.
RIM EL
= 479.75
wf
490
\
AT ELEV.
478;0
AND
F_ANOU 1
AT
\
'ELEV.-
477.0
----
---
--
-----
--
------
PROF
OSED 10
WIDE TCP
\
OF a
kM ELEV.
=483W
485
\
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GRA85
ED.405
`
\
CRE
ELEV:�
28'
.
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R STO
M ELEV.
482.50
480
4
480
`
6' DIA.
DEWATEF
ING
"4
`
DEVI
40
E-TUBIN
ORIFICE
S
\ .
---
t
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475
`
_
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BOTTO
OF
i
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ENERGY
BASIN =
76
~�,
DISSIPATER
OUTFALL
V
OT M.
i
EC-1
CL. AT
-
UNDE
ILAYME
TL=70,
1=375;.
470
470
RISER
..
.
FOODTING
---_-__......_._.
015" CL 1R RCP
465
BARREL
INV IN: 469.ft
465:
INV OUT. 468.61;.
GAL
STEEL
462
L-78'; S=0.501%
ANT
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4e2:
CO
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0+00 0+50 1+00 1+50 2+00 2+50 2+75
SEDIMENT BASIN 1
ROCKWEIR % // /
OUTFALL i
SEDIMENTTRAP#s
SCALE: z"=30' y
Y
Sediment Trap 1 Desgn J
drainage area (acres) (c3� _ r 2.94
trap vo9arnes t - - :.. l -. j-----
elevation.,_
(, area(sfZ. - _u volilrnejcy) _ ..
I _
- --469 2 - -- -- ---00 __---------- --- _
470 2986 Z762 4023..--
-471 3460 5,982; 221.E _ --
472 3965 SIM 359.0
473 __..4503 _.. _1 518.7
I
_.__ 7 a_mm5072 18e708 e _ 892.9,_..._.•"_.._.i..
...v................... ,........ W....�...,,..w.....,.........
x I ,
wet stcxage_ ( _
wet storage required (cy) (67*DA) 197.0 F
bottom of stone weir (ft} 470 801 _.
wet stpra a rovided at this elevation197.0
�cY) ,. 197 Q
s e cf�st0 a sides
(ft) (B)DA) 6
si0rage -... . _._ .... _ bosom of trap elevation (ft)..- 46i1 _ f -
drYstorms __ q_ (cy) (Ig �A) __i_ 197.0 _ boibm trap dimensions: _ ! 313 5x70
_ _ . _
crest of stone weir W-_ I 472.25 _ 1op of dam elewtion (ftZ r 4741
dry storage provided at #his vetion (cyj�� 197.0 _®® top width of dam (R) 6
slope of dry storage sides I 2:1 ;top trap dimensions - sBsx90
SCOTT R. COLLINSZ
Lie. No. 035791,a,
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STORMWATER MANAGEMENT NARRATIVE
IN GENERAL, THE PROPOSED PLAN UTILIZES A CLUSTER DEVELOPMENT THAT MINIMIZES LAND
DISTURBANCE AND MAXIMIZES OPEN SPACE PRESERVATION.
THE DEVELOPMENT ACHIEVES WATER QUALITY COMPLIANCE THROUGH THE EXTENSIVE LAND
PRESERVATION PROPOSED AND THE USE OF TWO LEVEL 1 BIORETENTION BASINS. THE PLAN ALSO
IMPLEMENTS CREATIVE DESIGNS CONSISTENT WITH THE ENVIRONMENTAL SITE DESIGN (M)
TECHNIQUES OUTLINED IN THE JULY 2013 DRAFT VSMH. EXAMPLES INCLUDE THE CONFIGURATION
OF THE ROAD/LOT LAYOUT TO MINIMIZE ITS IMPERVIOUS FOOTPRINT AND THE ALIGNMENT OF THE
ROADS HORIZONTALLY AND VERTICALLY TO REDUCE GRADING IMPACTS. THE END RESULT IS A
DEVELOPMENT THAT REQUIRES A MINIMUM PHOSPHOROUS LOAD REMOVAL OF 3.91 Ibs/yr. THE PLAN,
AS CURRENTLY PROPOSED, REMOVES 3.98 Ibs/yr. PLEASE SEE THE ATTACHED VRRM CALCULATIONS
FOR EVIDENCE OF THIS COMPLIANCE.
STORMWATER QUANTITY COMPLIANCE WILL BE MET THROUGH THE USE OF A DETENTION CELL
IMMEDIATELY DOWNSLOPE OF THE PROPOSED BIORETENTION BASINS' FILTER CELLS. THIS
DETENTION CELL WILL DETAIN SUBAREAS A & B.
General Construction notes for Stormwater ManaaemenYPlans
s. 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.
2. Pipe and riserjoints are to be watertight within stormwater Management facilities
3. For temporary sediment traps or basins which are to be converted to permanent
storrnwater management facilities; conversion is not to take place until the site is
stabilized, and permission has been obtained from the County erosion control
inspector.
Total Proposed Impervious Areas
Roadway
43,222 sf
Sidewalk
10,964 sf
Residences- Attached Homes
33,940 sf
Residences- Detached Homes
24,700 sf
112,826 sf
auDarea 'A' Impervious Areas
Roadway
20,219 sf
Sidewalk
4,096 sf
Residences- Attached Homes
33,940 sf
Residences- Detached Homes
2,600 sf
Existing Impervious Areas
9,275 sf
70,130 sf
Subarea '8' Impervious Areas
dway
23,003 sfwalk6,868
r
sf
dences- Detached Homes
5,200 sf
ting Impervious Areas
7,200 sf
42,271 sf
=TT R. COLLINS'Z
Lic. No. 035791 .1a�
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152115 s
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BIORETENTION BASIN'A' DESIGN & REQUIREMENTS:
SIORETENTION BASIN'B' DESIGN & REQUIREMENTS:
Treatment Volume (Per VRRM Calculations)
6,496 cf
Treatment Volume (Per VRRM Calculations)
5,022 cf
Minimum Treatment Volume Required for Level 1 Design
6,496 cf
Minimum Treatment Volume Required for Level 1 Design
5,022 cf
Minimum Forebay Volume Required (15% of Tv)
974 cf
Minimum Forebay Volume Required (15% of Tv)
753 cf
Forebay Volume Provided
1,240 cf
Forebay Volume Provided
951 cf
*Minimum Surface Area Required (Tv/Storage Depth)
3,014 sf
*Minimum Surface Area Required (Tv/Storage Depth)
2,330 sf
Surface Area Provided
3,044 sf
Surface Area Provided
2,430 sf
* Assumes a T of mix at 25% porosity; 3" of pea gravel at 2%
* Assumes a T of mix at 25% porosity; 3" of pea gravel at 2% porosity,
porosity, 12" of stone at 401Y6 porosity & 12" of ponding at 100%
12" of stone et 40% porosity & 12" of pending at 100% porosity
STORMWATER MANAGEMENT FACILITY GRADING
Area of
Elevation
Forebay Cell
Volume
(ft)
Contours (sf)
(cf)
484
80
0
486
289
347
488
1 625
11,240
Elevation
(ft)
Area of
Detention Cell
Contours (sf)
Volume
(cf)
469
68
0
470
211
133
472
685
984
474
1,325
2,959
476
2,105
6,359
478
3,055
11,481
480
4,098
18,465
482
5,250
27,718
483.5
9,737
38,786
Filter Cell
Elevation
Contours
Volume
(ft)
(sf)
(cf)
486
3,044
0
488
4,451
7,451
WATERSHED SUMMARY
Ow_no„o1....r..onr
STORMWATER MANAGEMENT FACILITY GRADING
Forebay Cell
Elevation
Contours
Volume
(ft)
(sf)
(cf)
480
29
0
482
213
214
484
550
951
Post -Development
1-year Flow, 2-year Flow, 10-year Flow,
1-year Flow,
2-year flow,
10-year
CN Area,ac.
cfs cfs cfs
CN
Area,
cfs
cfs
Flow, cfs
DAW
81.5
2.91
0-46
0.78
5,78
DA W
57.9 11.01 3.06 3.93 14.39
71.9
3.28
DA'C'
1 63.5
4.82
2.58
3.11
8.50
Total= 11.01
total= 11.U1 j.113 3.zs.f 14.Z6
Filter Cell
Elevation
Contours
Volume
IN
(sf)
(cf)
482
2,430
0
484
3,901
6,273
SWM FACILITY 'A' &'B'
LEVEL I BIORETENTION BASINS (3.xTv)
DETENTION CELL (ONLY) ROUTING
Routing Method: storage -indication
Basin Input Data
Hydrographe
Basin: Bioretention
Basin'A'
i-Yr 24-Hour SCS storm event
inflow (cfs) 7.438 at 12.02 (hrs)
9 Contour
Areas
discharge(cfs) o.455a$ 22.98(hrs)
Elevation(ft) Area(sf)
ComputedVol.(cy)
water level (ft) 479.3o6 at 13.42 (hrs)
469.00
68.00 0.0
storage (Cy) 589.103
470.00
211.00 4.9
472.00
685.00 36.4
Hydrograph1
474.00
2325.00 209.6
2-Yr 24-Hour SCS storm event
476.00
2105.00 235.5
inflow (cfs) 8.231 at 12.02 (hrs)
478.00
3055.00 425.5
discharge (cfs) o.78o at 12.go (hrs)
480.00
4098.00 689.5
water level (ft) 479.655 at 12.94 (hrs)
482.00
5250.00 1034.9
storage(cy) 638.387
483-50
9737.00 1444.8
Hydrograph 2
Start-Elevation(ft)
469.00 Vol.(cy) 0.00
10-Yr 24-Hour SCS storm event
inflow (cfs) 16.444 at 12.02 (hrs)
5 outlet Structures
Outlet structure 3
discharge (cfs) 5.777at 15.46(hrs)
Outlet structureo
Orifice
water level00 482.3n at 12.28 (hrs)
Culvert
name: Low -Flow Orfice
storage (cy) 1o99.886
name: Barrel
area (sf) 0.030
multiple 1
diameter or depth (in) 2.330
Hydrograph3
discharge outof riser
width for rect.(in) 0.000
too-Yr 24-Hour SCS storm event
D (in) 15.000
coefficient 0.600
inflow (cfs) 32.749 at 12.o2 (hrs)
h (in) o.000
invert (ft) 469.000
dischargeWS) 31.314at 12.04(hrs)
Length (ft) 78.000
multiple 2
water level (ft) 482.497at 12.04(hrs)
Slope 0.005
discharge intoriser
storage Icy) 1243.481
Manning'sn 0.013
Inlet coeff. Ke 0.500
Outlet structure 4
Equation constant set 3
Weir
Invert(it) 469.000
name: Emergency Spillway
length (ft) 80.000
Outlet structure 2
sideangle 63.430
Curve
coefficient 3.000
name: Riser
invert(ft) 482.250
multiple 1
multiple 1
Invert (ft) 479750
discharge throughdam
discharge intoriser
file: eighteen -ADS Grate Inlet.txt
Outlet structure 2
Orifice
name: Mid -Flow Orfice
area (sf) 0.049
diameter or depth (in) 3.000
width for rest. (in) 0.000
coefficient 0.600
invert (ft) 479-330
multiple 3
discharge intoriser
BASIN NOTES:
i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS.
2. A CONCRETE FOUNDATION SHALL BE INSTALLED ON THE RISER AS SHOWN & MEETING THE MINIMUM SPECIFICATIONS SET FORTH IN THE VESCH SPEC. #3.14.
3. AS SHOWN ON THE PLANS, 2' WIDE BIORETENTION BASIN SPILLWAY SHALL BE CONSTRUCTED WITH A CREST ELEVATION OF i' ABOVE BIORETENTION FLOOR,
CREATING AMAXIMUM BIORETEN11ON BASIN PONDING DEPTH OF 12". THE BIORETENTION BASIN WEIR WILL THEN OUTFALL TO THE DOWNSTREAM DETENTION
CELL FOR QUANTITY CONTROL.
4. CONTRACTOR AND CONSTRUCTION SHALL ADHERE TO ALL OSHA REQUIREMENTS.ADDITIONALLY, SPECIAL ATTENTION SHALL BE GIVEN TOTHE CONSTRUCTION
InflowHydrographs SHORING ASSOCIATED WITH THE BIORETENTION BASIN EXCAVATION.
4Inflow Hydrographs
Hydrograph o
SCS
name: i-Yr 24-Hour SCS storm event
Area (acres) 6.390
CN 76.400
Type 2
rainfall, P(in) 3.500
time ofconc.(hrs) 0.3600
time increment (hrs) 0.0200
timelimit(hrs) 3o.000
fudge factor 1.00
routed true
peak flow (cfs) 7.440
peak time (hrs) 12.o28
volume Icy) =56.390
Hydrograph 1
SCS
name: 2-Yr 24-Hour SCS storm event
Area (acres) 6.i90
CN 76.400
Type 2
rainfall, P (in) 3.700
time ofconc. (hrs) 0.3600
time increment (hrs) 0.0200
time limit (hrs) 30.000
fudge factor 1.00
routed true
peak flow (cfs) 8.232
peak time (hrs) 12.018
volume(cy) 2279.597
Hydrograph2
SCS
name: l0-W 24-Hour SCS storm event
Area (acres) 6.290
CN 76.400
Type z
rainfall, P (in) 5.600
time of conc. (hrs) 0.3600
time increment (hrs) 0.0200
time limit (hrs) 30.000
fudge factor 1.00
routed true
peak flow (cfs) 16.447
peak time (hrs) 12.018
volume Icy) - 2556384
Hydrograph3
SCS
name: Zoo-Yr 24-Hour SCS storm event
Area (acres) 6.190
ON 76.400
Type 2
rainfall, P (in) 9.000
time of conc. (hrs) 0.3600
time increment (hrs) 0.0200
time limit (hrs) 30.000
fudge factor 2.00
routed true
peak flow (cfs) 32-755
peak time (hrs) 12.018
volume Icy) 5091.292
PLANT SCHEDULE
SYM
--�-
BOTANICAL Ciwir10N NAME
SIZE
CANOPY (sf)
TOTAL SITE
QUANTITY
COVERAGE (sf)
TREES
BN
BETULA NIGRA
RIVER BIRCH
10'-12' ht.
1 397
6
2,382
AR
JACER RUBRUM
RED MAPLE
21/2" cal.
452
6
2,712
SHRUBS
CA
CLETHRAALNIFOLIA
SUMMERSWEETCLETHRA
24" HT.
16
38
608
IV
ITEAVIRGINICA
ISWEETSPIRE
64
114
1 896
GRASS
PY
1PANICUMVIRGATUM
SWITCH GRASS
TOTAL CANOPY
13,886
____..__----------
[TRASH RACKS TO BE INSTALLED ON ALL ORIFICES PER
VSMH TECHNICAL BULLETIN #7
495
ORIFICE COEFFICIENT =0.6
495
FROPOSE
CL
ANOLT,
EE
B
RETENT
ON CELL
S
WEIR AT
ELEV.
DETAIL
FOI
t
DO
NOT SUI
IFACE FL
DW
48BrWITi
2'
A
DITION
L
-
----�
NOTCH A
r 48T
INFOR
IATION.
TYP.)
EA
N SHAL
OUTFAIL
L
PROPC
BED 018
L-111
P
490
IN
E NDE
TLY INT
W
IR AT EL
V.
RISER
UM ELE
: 479.75
wl 0
IORETE
TION'q'
DETENTION
CELL
48
'WITH 2
ID FL
ORIF1
49
PROPOSED
N
TCH AT
3'
AT EL
V. 479.33
RE-TRE
TMENT
LEV. 48
1-t�2.
' LOW F
W ORI
ICE AT
RIP
AP
ELEV.
469
CHAP100-YR
SE
-
- --
=482.49
-
--
BIOR
ENTIDN
'
485
_
'
CELL
URFACE
10-
WSE
--
-
-
-
-
ELEV.
D u
TOP
485
F DAM
EY.
.5' ..
- -
- -
._. _::••::_::_:'
-
-
-YR WS
w/so, VDIDTSTD.
C-1CL
1
PROPOSED
479.66
RIPRAP
NED
RGENC
F REBAV
..... -.._ _
SP_1LL ...
,-
_
.25',
PRE-T EATME T
K.
TO EXTEND
TO S
EAM
3'OFSTA EAPPROVEDSOIL 12"
=;-:
MEDIA. SIDE SLOPE
ELE
= 1.
_- -
-
-_ =
480
EXCAVATION NEED NOT BE
_-
VERTICAL-
I
3" WIINIMUM
PEA GRAVEL LAYER
I2"MINI
UM GRA
EL SUMP
6" CHEDUL 40 PERF RATED PVC
ELEV.
4 .75'
EPTH)
475
UNDERDRAINS, io' MAXIMUM
475
i
SPACING WITH CLEANOUTS, SHALL BE
INSTALLED THROUGHOUTTHE
e
BIOFILTERS IN THE LOWER STONE
-
- LAYER. UNDERDRAINS SHALL BE
I
--
-
- -
--
SLOPED TO DRAIN TO THERISER
STRUCTURE OR TO DAYLIGHT INTO
470
THE DETENTION CELL & SHALL HAVE
470
A 12" STONE SUMP LOCATED BELOW
TH INVERT F7HE UNDERDRAINS.
RISER
FOOTING
-__
__._.-_.....-..---
------
465
!PJ15" CL. II RCP
P
POSED
i4IPRAP
BARREL
ENERGY
DISSIPATER
1 465
LITE
BILL VDOT
STD. U;
MIV IN: 469.00;
-
NV OUT. 468.61;
Cl_,,
j
Lt62
L=78; S=0.50%
RIP
WlGEDFABRiC
462
W1=3
6; W2=9.25'; D=1A'
00
Q
co
coS00
ELsLL,
3.00
It
.
W
0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 3+75
SWVI FACILITY'A' &'B'
MAINTENANCE
1. BIORETENTION SHALL BE MAINTAINED IN ACCORDANCE WITH COMMONWEALTH OF VIRGINIA REQUIREMENTS.
2. MAINTENANCE SHALL OCCUR ANNUALLY EACH SPRING.
3. EACH MAINTENANCE INSPECTION SHALL INCLUDE:
3.1. VISUAL INSPECTION -ASSURE 7S%TO go%COVER HAS BEEN ACHIEVED IN THE BED (MULCH AND VEGETATION), MEASURE DEPTH OF REMAINING
MULCH
3.2. CHECK FOR SEDIMENT BUILDUP OR TRASH AND REMOVE fl'
3.3• INSPECT BIORETENTION SIDE SLOPES FOR EROSION AND REPAIR
3.4. CHECK INFLOW POINTS FOR CLOGGING, REMOVE ANY SEDIMENT
3.5. LOOK FOR BARE SOIL IN CONTRIBUTING DRAINAGE AREA, AND STABILIZE IMMEDIATELY
3.6. CHECK FOR CLOGGED OR SLOW -DRAINING SOIL MEDIA, A CRUST FORMED ON THE TOP LAYER, INAPPROPRIATE SOIL MEDIA, OR CAUSES OF
INSUFFICIENT FILTERING TIME AND RESTORE PROPER FILTRATION CHARACTERISTICS
3.7, SPOT RESEEDING - IMMEDIATE STABILIZATION OF BARE OR ERODING AREAS WITH GRASS COVER
3.8. REPLACE ANY DEAD OR SALT KILLED PLANTS
iCOTT R COLLINS!Z
Lic. No. 035791 .b.
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SCALE
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