HomeMy WebLinkAboutWPO202200040 Plan - VSMP 2022-09-21CENERAL NOTES
OWNERS:
TMP 046Eo-oq-oo-000Ao
STANLEY MARTIN HOMES, LLC
ii7io PLAZA AMERICA DRIVE
RESTON, VA 20190
TMP 0461mo-io-oo-000lzo
STANLEY MARTIN HOMES, LLC
ii7io PLAZA AMERICA DRIVE
RESTON, VA 20190
TMP 0405-00-00-002CO
COUNTY OF ALBEMARLE C/O FINANCE ADMINISTRATION
401 MCINTIRE ROAD
CHARLOTTESVILLE, VA 22902
DEVELOPER:
RIVERBEND DEVELOPMENT, INC.
455 SECOND STREET SE, SUITE 201
CHARLOTTESVILLE, VA 22902
ENGINEER:
COLLINS ENGINEERING
2oo GARRETT ST, SUITE K
CHARLOTTESVILLE, VA 22902
TAX MAP:
TMP 046Eo-oq-oo-000Ao
INSTRUMENT #202200004923
8.12 ACRES (PORTION OF)
TMP 0461no-io-oo-000lzo
INSTRUMENT#202200004923
0-72ACRES
TMP 0405-00-00-002CO
D.B.!1973, PG. 437
4-75ACRES
TOTAL PROJECT AREA:
8-04ACRES
ZONING:
NEIGHBORHOOD MODEL DEVELOPMENT DISTRICT
(ZMA2o-i8000i:L WITH PROFFERS - APPROVED BYTHE
BOARD OF SUPERVISORS ON JULY 17,20-19)
THE CODE OF DEVELOPMENT AND AND APPLICATION
PLAN FROM ZMA20:1500007 ARE STILL VALID AND STILL
APPLY TO THE BROOKHILL PROJECT.
ENTRANCE CORRIDOR OVERLAY (EC), AIRPORT IMPACT
OVERLAY (AIA), MANAGED AND PRESERVED SLOPES
OVERLAY DISTRICT, AND FLOOD HAZARD OVERLAY (FH)
ZONING DISTRICT.
PROPOSED USE:
EXTENSION OF ARCHER AVENUE TO CONNECTTO
ASHWOOD DRIVE
WATERSHED:
SOUTH FORK RIVANNA RIVER
AGRICULTURAL/FORESTAL
DISTRICT: NONE
TOPOGRAPHY & SURVEY:
TOPOGRAPHY WAS COMPILED FROM SURVEY BY
LINCOLN SURVEYING AND BELL LAND SURVEYS,
JANUARY 20:15. BOUNDARY INFORMATION WAS
COMPILED BY LINCOLN SURVEYING ON MARCH 7,
2015. FIELD VERIFIED BY COLLINS ENGINEERING IN JUNE
OF 2021.
DATUM:
NAVID -1988
EXISTING VEGETATION:
MOSTLYWOODED
PRESERVED/MANAGED SLOPES: PRESERVED AND MANAGED STEEP SLOPES ARE
SHOWN WITHIN THE LIMITS OF THE PROPERTY. SEE
EXISTING CONDITIONS SHEET FOR LOCATIONS.
BURIAL SITES:
NO CEMETERIES WERE FOUND DURING FIELD
INVESTIGATION WITHIN THE PROJECT AREA FOR THIS
ROADIMPROVEMENTSPLAN.
FLOODPLAIN:
THERE IS A FLOODPLAIN LOCATED ON THIS SITE. FEMA
MAP ID 51003CO28oD DATED FEBRUARY 4, 2005. IN
ADDITION, A DAM BREACH INUNDATION ZONE EXISTS
ON THE PROPERTY FOR THE SOUTH RIVANNA DAM,
WHICH IS A FEDERAL DAM LOCATED UPSTREAM OF THE
PROPERTY.
RETAINING WALLS:
NO RETAINING WALLS ARE PROPOSED WITH THIS
PROJECT.
UTILITIES:
ALBEMARLE COUNTY WATER & SEWER
BROOKHILL = ARCHER AVENUE EXTENSION
VSMP PLAN
RIVANNA MAGISTERIAL DISTRICT
ALBEMARLE COUNTY, VIRGINIA
KOCH COURT
0 1
) C�i
SHEET LAYOUT
SCALE: 1" = 80'
Poto
G`Ou/�Vnsz-40
VICINITY MAP
SCALE: 1" = 2000'
Sheet List Table
Sheet Number
Sheet Title
1
COVER
2
EXISTING CONDITIONS
3
EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS
4
EROSION & SEDIMENT CONTROL PHASE I PLAN
5
EROSION & SEDIMENT CONTROL PHASE 11 PLAN
6
EROSION & SEDIMENT CONTROL PHASE III PLAN
7
EROSION & SEDIMENT CONTROL NOTES & DETAILS
8
PRE -DEVELOPMENT STORMWATER MANAGEMENT PLAN
9
POST -DEVELOPMENT STORMWATER MANAGEMENT PLAN
10
STORMWATER QUALITY PLAN
11
STORMWATER MANAGEMENT NOTES & DETAILS
12
STORMWATER MANAGEMENT NOTES & DETAILS
13
OVERALL BROOKHILL STORMWATER QUALITY SUMMARY
13 TOTAL SHEETS
LEGEND:
1IRGINIA EROSION & SEDIMENT CON7ROL
EROSION CONTROL HANDBOOK SPECIRCATON NUMBER
CONSTRUCTION ENTRANCE
3.02
CONSTRUCT70N ROAD
J. 0i
STABILIZA TION
SF
X X X
SIL T FENCE
3.05
ST
SEDIMENT TRAP
J. ii
OU7LET PROTECT70N
J. 18
RIPRAP
J. 19
CHECK DAM
J. 20
__QS)_
TEMPORARY SEEDING
3.31
PERMANENT SEEDING
3.32
TREE PROTECT70N
J. J8
0
DUST CONTROL
J. 39
SITE
PLAN
EDGE OF PA VEMEN T
CURB
PROPOSED ASPHALT PAVEMENT
GREEN WAY BUFFER
PROPOSED EASEMENT
fl
DROP INLET
DRAINAGE PIPE
-200- — — —
EXISTING CONTOUR
2oo
PROPOSED CONTOUR
PRESERVED STEEP SLOPES
MANAGED STEEP SLOPES
I
PROPOSED CONCRETE
PROPOSED STREAM IMPACTS
(D
0 0 (0
100 YR. FLOODPLAIN
APPROVALS
DATE
DEPARTMENT OF COMMUNITY DEVELOPMENT
PLANNER/ZONrNG
ENGINEER
INSPECTIONS
ARB
DEPARTMENT OF FIRE RESCUE
ALBEMARLE COUNTY SERVICE AUTHORITY
VIRGINIA DEPARMENT OF TRANSPORTATION
HEALTH DEPARTMENT
Lic. No. 035791
8/22/22 ��j
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_j XISTING 18" 1 CULVERT GENERAL NOTES: 0
1. THERE IS A FLOODPLAIN LOCATED ON THIS SITE. FEMA MAP ID z
51003CO280D DATED FEBRUARY 4, 2005. IN ADDITION, A DAM 'S'101VAL V,
BREACH INUNDATION ZONE EXISTS ON THE PROPERTY FOR THE
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EXISTING FENCE SOUTH RIVANNA DAM, WHICH IS A FEDERAL DAM LOCATED
UPSTREAM OF THE PROPERTY.
2. A PROPOSED GREENWAY IS SHOWN ON THE SUBJECT PROPERTY.
q 3. BEFORE BEGINNING SITE WORK, THE CONTRACTOR SHALL 0
TMP: 046BS-oo-oo-ooiCo EXISTING TREELINE INVESTIGATE AND VERIFY THE EXISTENCE AND LOCATION OF 0
OWNER: COUNTY OF ALBEMARLE UNDERGROUND UTILITIES, MECHANICAL AND ELECTRICAL SYSTEMS, 0
ACREAGE: 4 t AND OTHER CONSTRUCTION AFFECTING THE WORK. BEFORE
.75 AC
ZONING: PUD
CONSTRUCTION THE CONTRACTOR SHALL VERIFY THE LOCATION
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�Tl 046135-oo-oo-000To TION OF SANITARY
D. B./PG.: 1973/473
AND INVERT ELEVATIONS AT POINTS OF CONNEC u
t I III OWNER: FOREST LAKES SEWER, STORM SEWER, AND WATER -SERVICE PIPING;
Ij I I I I I -C,
COMMUNITY ASSOCIATION Il UNDERGROUND ELECTRICAL SERVICES, AND OTHER UTILITIES. THE
A ZONING: PUD CONTRACTOR SHALL FURNISH LOCATION DATA FOR WORK RELATED
CREAGE: 4.12 AC
TO PROJECT THAT MUST BE PERFORMED BY PUBLIC UTILITIES z
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ACREAGE: 8.12 AC
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ALBEMARLE COUNTY I
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PRESERVED S
TEEP SLOPES., EXISTING SANITARY SEWER AND
EXISTING SWM FACIE! 14 ilk 20 SANITARY SEWER EASEMENT
(D.B. 1450, PG
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9-11 VSMP PLAN FOR EXISTING
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1992 3.38
EROSION & SEDIMENT CONTROL
EROSION CONTROL NOTES
DESCRIPTION OF EROSION & SEDIMENT
EROSION CONTROL NOTES & NARRATIVE
MEASURES:
1.
THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO 7HE
CONTROL
MEASURES:
PRE-CONS7RUC77ON CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
-
PROJECT DESCRIP770N.-
STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECRON.
THE PURPOSE OF THIS LAND DISTURBANCE AC77WTY IS TO CONSTRUCT TIE ARCHER AVENUE ROAD EXTENSION FROM 7HE BROOKILL
ACCORDANCE NTH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
2.
ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND
EROSION AND SEDIMENT CONTROL MEASURES:
SUBDIVISION TO ASHWOOD BOULEVARD. A POR77ON OF THIS PROJECT IS WITHIN THE LAND DISTURBANCE LIMITS APPROVED KITH THE
S7RUCTURAL PRAC77CES USED IN THIS SEC77ON CONSIST OF THE FOLLOWING:
MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE VIRGINIA
IT IS ANT7CIPA TED TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION,
BROOKHILL BLOCKS 9, 10, & 11 VSMP PLAN (WPO202000004). 7HIS PROJECT PROPOSES TO DIS77JRB AND ADDIT70NAL ,144 cc. OF LAND.
EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULA77ONS VR
DIVERSIONS, SEDIMENT TRAPS, A UTILITY STREAM CROSSING, AND SILT FENCES TO CONTROL
774E PROJECT WILL BEGIN ITS CONSTRUC77ON WITH THE PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS
3.01 SAFETY FENCE.,
625-02-00 EROSION AND SEDIMENT CON7ROL REGULATIONS.
SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND
ANTICIPATED TO BE IN THE MN7ER OF 2022 THE WORK IS ANTICIPATED TO BE COMPI WITHIN 12 MONTHS AND TO CONCLUDE IN THE
A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE.
TO PROHIBIT 77-IE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY 774E PUBLIC.
3.
ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR
DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS ARE NOT BE REQUIRED NTH THIS
WINTER OF 2023.
APPLICABLE TO ANY CONT70L MEASURE OR SERIES OF MEASURES WHICH CAN BE
AS THE FIRST STEP IN CLEARING.
PROPOSED DESIGN. SHOULD FIELD ADJUSTMENTS NECESSITATE A SMALL STOCKPILE AREA, IT
EXIS77NG S17E COND177ONS,
CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC.
4.
A COPY OF THE APPROVED EROSION AND SEDIMENT CON7ROL PLAN SHALL BE
SHALL BE DISCUSSED KITH THE ESC INSPECTOR AHEAD OF 77ME THE STOCKPILE WILL NEED TO
THE AREA OF THE PROPOSED DEVELOPMENT IS LARGELY WOODED AREAS WITH OPEN SPACES AND LIGHT UNDERBRUSH. 7HIS S17F
MAINTAINED ON THE SITE AT ALL TIMES.
GENERALLY SLOPES FROM THE WEST TO THE EAST, AND FROM THE NORTH TO THE SOUTH. 7HE S17E IS GENERALLY STEEP AND IS WELL
3.02 CONSTRUCTION ENTRANCE.
5.
PRIOR TO COMMENCING LAND DISTURBING ACTIW77ES IN AREAS OTHER THAN
BE MAINTAINED AND STORED FOR LATER SPREADING. STOCKPILE LOCA77ONS SHALL BE ON SITE
DRAINED.
A STABILIZED CONSTRUCTION EN7RANCE LOCATED AT POINTS OF VEHICULAR INGRESS AND
INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIM17ED TO, OFF -SITE BORROW OR
AND SHALL BE STABILIZED KITH A TEMPORARY VEGETATIVE COVER. PERMANENT SEEDING KILL
ADJACENT AREAS:
EGRESS ON A CONSTRUCT70N S17E TO REDUCE THE AMOUNT OF MUD TTANSPI ONTO
WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION
BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE
THIS SITE IS BORDERED ON THE EAST BY EXIS77NG FOREST LAKES RESIDEN77AL DEVELOPMENT. NORTH OF THE PROPOSED S17E IS
PA WD PUBLIC ROADS BY MOTOR WHICLES OR RUNOFF. CONSTRUCTION EN7RANCES SHALL
CONTROL PLAN TO THE OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING
CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR
ASHWOOD BOULEVARD. WEST OF THE DEVELOPMENT IS ROUTE 29, AND THE BROOKHILL DEVELOPMENT EXISTS TO THE SOUTV.
BE INSTALLED AS SHOM ON THE PLANS TO REDUCE THE AMOUNT SEDIMENT TTANSFORTED
AUTHORITY.
OFFS17E LAND DISTURBANCE,
ONTO PUBLIC ROADWAYS.
6.
7HE CONTTACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION
ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELEC77ON OF
OFFS17E LAND DISTURBANCE IS LIM17ED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED WITHIN THE OVERALL BROOKHILL DEVELOPMENT
3.03 CONSTRUCTION ROAD STABILIZATION.,
CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA77ON AS
SEED MIXTURE WILL DEPEND ON THE 77ME OF YEAR APPLIED. TEMPORARY SEEDING KILL BE
BOUNDARY.
THE TEMPORARY STABILIZATION OF ACCESS ROADS, SUBDIVISION ROADS PARKING AREAS
DETERMINED BY THE PLAN APPROVING AUTHORITY.
PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE THAN SEVEN
SOILS,
AND 07HER SITE VEHICLE TRANSPORTA71ON ROUTES W7H STONE IMMEDIATELY AFTER
7
ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CON7POL MEASURES
DAYS. THESE AREAS SHALL BE SEEDED NTH FAST GERMINATING VEGETA77ON IMMEDIATELY
SEE SOIL DESCRIP77ONS ON THIS PAGE AND 7HE PHASE I EROSION & SEDIMENT CONTROL PLAN FOR BOUNDARIES SOIL TYPES AND SOIL
GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CON57RUCTION 7RAFFIC
AT ALL 77MES DURING LAND DISTURBING AC77W77ES AND DURING SITE DEVELOPMENT
FOLLOWING GRADING OF THOSE AREAS. SELECT70N OF SEED MIXTURE WILL DEPEND ON THE 77ME
DESCRIP 77ONS.
DURING WET WEATHER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF
UN77L FINAL STABILIZA77ON IS ACHIEVED.
OF YEAR APPLIED.
CRI77CAL AREAS.
PERMANENT ROADBEDS BETWEEN 774E 77ME OF IN177AL GRADING AND FINAL STABILIZA 770N.
8.
DURING DEWATERING OPERATIONS, WATER KILL BE PUMPED INTO AN APPROVED
EXIS77NG WETLANDS AND INTERMITTENT STREAMS ARE LOCATED ON THE PROJECT SITE 774ESE AREAS, IN ADDIT70N TO THE MANAGED AND
USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE CONSTRUCTED, IWE7HER
FILTERING DEVICE.
PRESERVED STEEP SLOPES, ARE CONSIDERED TO BE CRI77CAL AREAS THE CON7RACTOR SHALL GIVE EXMA AT7ENT70N AND CAUTION IN
PERMANENT OR TEMPORARY, FOR USE BY CONS7RUC77ON 7RAFFIC.
9.
THE CON7RACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY
3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PAR77CULAR AREA.
AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOSITED ON 7HEM OUTSIDE THE SCOPE OF 7HE PROPOSED PLAN. T?EE
3.05 SILT FENCE:
AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR
3.02 CONSTRUCT70N ENTRANCE - TO REDUCE THE AMOUNT OF MUD 7RANSPORTED ONTO PAVED
PR07EC77ON FENCING, SILT FENCING, DIVERSIONS AND SEDIMENT TRAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND
A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SM7HET7C FILTER FABRIC STRETCHED
CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL
PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
DISTURBANCE TO ENSURE THESE CRI77CAL AREAS ARE MAINTAINED.
ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND
10.
BE MADE IMMEDIATELY
ALL FILL MA TERIAL TO BE TAKEN FROM AN APPROVED, DESIGNA TED BORROW AREA.
3.03 CONSTRUC77ON ROAD STABILIZAT70N - TO REDUCE 7HE EROSION OF TEMPORARY
SEQUENCE OF CONS7RUC770N.
DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONS7RUC770N
11.
ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EAR7H FILL
ROADBEDS BY CONSTRUCT70N TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT
1. CONTRACTOR SHALL N077FY 7HE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A
OPERA 77ONS IN ORDER TO PREVENT SEDIMENT FROM LEA VING THE SITE, AND TO DECREASE
PRE-CONSNUCTION MEETING.
THE VELOCITY OF SHEET FLOWS AND LOW70-MODERATF LEVEL CHANNEL FLOWS. THE SILT
SHALL BE INERT MATERIALS ONLY FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND
REGARDING OF PERMANENT ROADBEDS BETWEEN THE TIME OF IN177AL GRADING AND FINAL
2. PRIOR TO DIS7URBANCES, THE LIMITS OF DIS7URBANCE AND PRESERVED SLOPES SHALL BE FLAGGED AND THE MEE PR07EC77ON
FENCE BARRIERS SHALL BE INSTALLED DOM SLOPE OF AREAS W7H MINIMAL GRADES TO
0 THER DEBRIS
STABILIZAPON. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE CONTRACTOR
FENCING SHALL BE INSTALLED. NO GRADING MAY BEGIN UN77L 7HE LIM17:5 OF DIS77JRBANCE AND PRESERVED SLOPES HAVE BEEN
FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. 774EY SHALL BE
12
BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLE77ON
PARKING & STAGING AREAS AS NEEDED.
FLAGGED AND THE TREE PR07EC77ON HAS BEEN INSTALLED.
INSPECTED IMMEDIA TEL Y AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE W7H THE
VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH)
PER ZONING ORDINANCE SEC77ON 5.1.28.
3,05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS.
J. NO EROSION CON7ROL MEASURES MAY BE REMOVED DURING THE CONSTRUC77ON PROCESS KlTHOUT 7HE APPROVAL FROM 7HE
13.
ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE NTH SECT70N 13-301
INSPECTOR ON THE PROJECT
OF THE CODE OF ALBEMARLE.
3,07 STORM DRAIN INLET PROTECTION- INLET PROTECTION IS PROPOSED ON INLETS� WHERE
4. INSTALLA77ON OF THE PROPOSED CONSTTUCTION ENDTANCE SHALL OCCUR NEXT. THE CONTTACTOR SHALL APPLY CONSTTUCRON
3.07 STORM DRAIN INLET PRI
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP
14.
BORROW, FILL OR WASTE AC77WTY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT
SHOWN ON THE PLANS.
ROAD STABILIZA77ON AS NEEDED. CONTRACTOR SHALL ENSURE THE CONSTRUC77ON ENTRANCE DRAINS TO AN ADEQUATE E&S
INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS
SHALL BE LIMITED TO THE HOURS OF 7. 00 AM TO 9: 00 PM.
3.09 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED KHERE SHOWN ON THE PLANS TO
MEASURE THE CONTYACTOR SHALL INSTALL SEDIMENT TRAP #1 FOR VEHICULAR WASH OFT, ALONG NTH THE ASSOCIATED DIVERSION
PRIOR TO PERMANENT STABILIZA77ON OF THE DIS77JRBED AREA. INLET PR07EC77ON APPLIES
15.
BORROW, FILL OR WASTE AC77WTY SHALL BE CONDUCTED IN A SAFE MANNER THAT
DIRECT RUNOFF INTO A SEDIMENT 7RAPPING DEWCE.
BERMS AND RIGHT OF WAY DIVERSION BERM. CONS7RUC77ON EN]TRANCE TO BE INSTALLED WHERE CONSTTLICT70N VEHICLE ROUTES
WHERE STORM DRAIN INLETS ARE TO BE MADE OPERAT70NAL BEFORE PERMANENT
MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS,
J. 13 SEDIMENT TRI SEDIMENT TRAPS ARE PROPOSED WHERE SHOWN ON THE PLANS.
INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING
STABILIZAT70N OF THE CORRESPONDING DISTURBED DRAINAGE AREA.
PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY
ONTO 7HE PAVED SURFACE IIIHERE SEDIMENT IS 7RANSPORTED ONTO A PUBLIC ROAD SURFACE, 7HE ROAD SHALL BE CLEANED
PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE.
J. 18 OUTLET PROTECTION -OUTLET PR07ECTION IS PROPOSED AT 7HE OUTLET OF PIPES. 3.19
THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND
3.09 TEMPORARY DIVERSION DIKE.
16.
TLIE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR
RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES.
7RANSPOR77NG TO A SEDIMENT CON7ROL DISPOSAL AREA. STTEET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REA40VED
A TEMPORARY RIDGE OF COMPACTED SOIL CONS7RUC7ED AT 7HE TOP OR BASE OF A
CONVERT TO PERMANENT STORMWA TER MANAGEMENT FACILITIES WHERE APPLICABLE
3.25 UTILITY STREAM CROSSING -A U77LITY STREAM CROSSING IS PROPOSED FOR THE
IN 7HIS MANNER SEDIMENT LADEN RUN-OFF FROM THE CONS7RUC77ON ENTTANCE AND DISTURBED AREA WITHIN THE DRAINAGE
SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS
ALL EROSION CON7ROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE
CONSTRUCTION OF ARCHER AVENUE'S EXTENSION.
AREA TO SEDIMENT TRAP #5 SHALL BE ROUTED TO THE TRAP NTH THE INSTALLAT70N OF THE DIVERSION BERMS AND ROW
AWAY FROM UNPROTECTED DIS77JRBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO
SALE OF ANY LOT, UNIT BUILDING OR OTHER PORT70N OF THE PROPERTY.
DIVERSION BERM
DIVERT SEDIMENT -LADEN RUNOFF FROM A DIS77JRBED AREA TO A SEDIMENT-7RAPPING
17
TEMPORARY STABILIZA77ON SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING
3.J2 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED NTH THIS PLAN.
5. ONCE THE CONSTRUC77ON ENTRANCE HAS BEEN INSTALLED ALONG K17H SEDIMENT TRAP #1 AND ITS ASSOCIATED DIVERSION BERMS
FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWA TER
7 70 1.11 ..��=. 77�.l A.In OJID^=�n^II,1 �cc nm^=�77,1,,, I� no ^�Cn .� 7�1� M A�l
ORING
I : :
:X. : -
.
K . ::.,... - .
�::::::: .
- _�W_ooi - CORRECT TRUNK ARMORING
go 001
TRIANGULAR BOARD FENCE
RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES OR
IS TO BE AT 75 LBSIACRE, AND IN THE MONTHS SEPTEMBER TO FEBRUARY TO
-
AND RIGHT OF WAY DIVERSION BERM, THE CONMACTOR SHALL RE-ROU7E THE EXIS G BLOCK 9, 10, & 11 SWU BASIN OUTFALL,
RETAIN SEDIMENT ON S17E DURING CONSTRUC77ON THESE STRUCTURES GENERALLY HAVE A
CONSIST A 50150 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH
SEE THE ESC PLAN FOR 7HE REQUIRED LOCA77ONS
THEN INSTALL THE U77LITY STREAM CROSSING (PROPOSED CULWRT CROSSING.)
LIFE EXPECTANCY OF 18 MONTHS OR LESS, MICH CAN BE PROLONGED W774 PROPER
AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF
J.J9 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED KITH THIS PLAN.
6. THE CONMACTOR SHALL INSTALL THE 6' WIDE 2:1 SIDE SLOPE TYPE B U77LITY SMEAM CROSSING AS SHOWN AND N07ED ON PHASE Source: Va. DSVIC
MAINTENANCE.
GERMAN MILLET. SMA W MULCH IS TO BE APPLIED A T 80LBS1100SF. AL 7ERNA 77VES
I OF 7HE EROSION AND SEDIMENT CONTTOL PLANS. 7H/S SHALL INCLUDE THE STREAM DIVERSION AND THE INSTALLAT70N OF THE
ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR.
CULVERT ONCE THE COUNTY AND VDOT INSPECTORS HAVE APPROVED THE CULVERT INSTALLATION, THE CONTRACTOR MAY INSTALL
3.11 TEMPORARYRIGHT-OF-WAY DIVERSION.,
18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND
AJA1A1T9-A1AA1rC'-
THE FILL MATERIAL OVERALL 7HE CULVERT. 7HE DOWNSTREAM EROSION CON7ROL MEASURES SHALL BE INSTALLED PRIOR TO THE Paved construction entrance for erosion control plans
� .. I `.W,�, . . 1� 11. �11� V� .�M Y., Uvl�� .I- . �1.
MULCH AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS11000SF,
INSTALLA T70N OF THE FILL TERIAL, INCLUDING THE WIRE SILT FENCE. 7HE CONTRACTOR SHALL ONLY INSTALL ENOUGH FILL
DIS77JRBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW LENGTH
INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT
IN GENERAL, DURING CONSTRUC77ON THE RLD OR CON7RACTOR ON-S17E WILL CHECK ALL EROSION
MATERIAL OVIER THE CULVERT PIPE TO ACCESS THE AREAS ON 774E NORTH SIDE OF THE CULVERT PIPE
WITHIN A SLOPING RIGHT-OF-WAY THEREBY REDUCING 7HE EROSION P07EN77AL BY
DIVERTING STORM RUNOFF TO A STABILIZED OUTLET GENERALLY, EARTHEN DIVERSIONS ARE
1000LBSIACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING
AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING
7
ONCE ENOUGH FILL MATERIAL HAS BEEN INSTALLED FOR A STTEAM CROSSING KITH TLIE EARTH MOVING EQUIPMENT THE
APPLICABLE WHERE 774ERE WILL BE LITTLE OR NO CONSTRUCTION TRAFFIC WITHIN THE
SHALL BE APPLIED AT 180LBSIACRE AND CONSIST OF 957 KENTUCKY J1 OR TALL
REPORTS WILL BE REQUIRED FROM 7HE RLD IF NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO
CONTRACTOR SHALL CON77NUE TO INSTALL THE REMAINING ESC CONSTRUCTION MEASURES, AS SHOWV ON 77-IE PHASE I EROSION &
RIGHT-OF-WAY GRAVEL STRUCTURES ARE MORE APPLICABLE TO ROADS AND 07HER
FESCUE AND 0-57 PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. S7RAW MULCH IS
THE FOLLOWING ITEMS.,
SEDIMENT CONTTOL PLAN. 7HE MEASURES INCLUDE INSTALLING 7HE PERIMETER SILT FENCE AND PERIMETER DIVERSION BERMS.
PERIMETER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSNUCTED AS A FIRST STEP K17H ANY LAND DISTURBANCE
RIGHTS -OF -WAY WHICH ACCOMMI VEHICULAR TRAFFIC
TO BE APPLIED AT 80LBS1100SF. ALTERNATIVES ARE SUBJECT TO APPROVAL BY THE
a.SEDIMENT BASINS ANDIOR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITLI
AC77WTY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.
3.1.3 TEMPORARY SEDIMENT TRAP.*
EROSION CONIFROL INSPECTOR.
THE VIRGINIA EROSION & SEDIMENT CON7ROL HANDBOOK.
b. ALL GRA VEL OU 7LETS WILL BE CHECKED REGULARL Y FOR SEDIMEN T BUILDUP THA T WILL
8.
ONCE THE PERIMETER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND THE COUNTY INSPECTOR HAS APPROVED THESE
A TEMPORARY PONDING AREA FORMED BY CONS7RUC77NG AN EAR774EN EMBANKMENT W7H A
19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH
PREVENT PROPER DRAINAGE IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE
MEASURES, THE CONTRACTOR MAY PROCEED WITH THE LAND CLEARING OPERA T70NS FOR 77-IE INSTALLA77ON OF THE SEDIMENT TRAPS.
STONE OUMET TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS LONG
RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED
REMOVED AND CLEANED, OR IT WILL BE REPLACED.
7HE CONNACTOR SHALL BEGIN BY CLEARING 7HE AREAS REQUIRED TO ACCESS TIE LOCAT70NS OF SEDIMENT 7RAPS 2 & J.
ENOUGH TO ALLOW 7HE MAJORITY OF 774E SEDIMENT TO SET7LE OUT. USE BELOW
IMMEDIATELY SILT MAPS ARE TO BE CLEANED WHEN 507 OF THE WET STORAGE
c. ALL SIL T FENCE BARRIERS WILL BE CHECKED REGULARL Y FOR UNDERMINING OR DETERIORA 77ON
INSTALLA T70N OF SEDIMENT 7RAPS #2 & #3 SHALL IMMEDIA 7EL Y FOLLOW THE SELECTIVE CLEARING. FOLLOWING THE INSTALLA 77ON OF
DISTURBED AREAS IIHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS 774AN J ACRES,
VOLUME IS FILLED NTH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN
OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN 7HE LEVEL
774ESE MEASURES, THE CONTTACTOR SHALL INSTALL 77-IE DIVERSIONS. ANY REMAINING EROSION CONMOL 17EMS AS SHOWN ON 7HE
WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS AND IT MAY BE
NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION
OF SEDIMENT DEPOS177ON REACHED HALF WAY TO 7HE TOP OF THE BARRIER
PHASE I EROSION CON7ROL PLAN SHALL ALSO BE CONSTTUCTFD AT THIS TIME.
CONSTRUCTED E1774ER INDEPENDENTLY OR IN CONJUNC77ON WITH A TEMPORARY DIVERSION
DYKES WHICH ARE COLLEC77NG SEDIMENT TO HALF 7HEIR HEIGHT MUST BE CLEANED
d. ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE TLIA T A GOOD STAND IS
9.
ONCE ALL 77-IE PHASE I EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL, DRAINAGE IS PROPERLY CONVEYED TO
DIKE.
AND REPAIRED IMMEDIATELY
MAINTAINED. AREAS SHOULD BE FER77LIZED AND RESEEDED AS NEEDED.
THESE MEASURES, AND 7HE ESC INSPECTOR HAS GRANTED APPROVAL, 7HE CONTRACTOR CAN BEGIN CLEARING THE REMAINDER OF
20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED
IN CASE OF EMERGENCY THE PRIMARY CONTACT FOR 7HE PROJECT WILL BE THE RLD OR
THE S17E TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED.
3.14 TEMPORARY SEDIMENT RASIN:
A TEMPORARY BARRIER OR DAM KITH A CONTROLLED STORMWATER RELEASE STRUCTURE
WITHIN JO DAYS OF FINAL SITE STABILIZATFON, WHEN MEASURES ARE NO LONGER
CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS 77ME IS DIGS. BROOK WOOD NTH DIGS MAY
10.
AFTTR CLEARING THE PROPOSED AREAS, THE CONMACTOR CAN PROCEED TO PHASE 11 OF THE EROSION & SEDIMENT CONT70L PLAN.
FORMED BY CONSTRUCTING AN EMBANKMENT OF COMI SOIL ACROSS A
NEEDED, SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR.
BE REACHED AT (434) 978-44J5. IN ADD177ON THE OWNER MAY BE CONTACTED. UPON
THE CONNACTOR SHALL BEGIN ROUGH GRADING 7HE SITE TO THE CONTOURS SHOWN ON THE PHASE // EROSION & SEDIMENT
DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS
21. 774E E&S INSPECTOR HAS THE AUTLIORITY TO ADD OR DELETE E&S CONTROLS AS
COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTFNANCE.
CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP W774 ANY LAND DISTURBANCE
ACTIVITY AND SHALL BE MADE FUNCT70NAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.
IN "WET" AND 'DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO
IvCL,Ca0^ff I 'IV Inc rlc�u ^a a, 1IZ UU , "vivo GnAvGI 'IV � I "VIV, Ivu acu"I I
SETTLE OUT APPLIES BELOW DISTURBED AREAS WIERE THE TOTAL CONTRIBUTING DRAINAGE
BASIN OR 7RAP CAN BE REA40VED WITHOUT WRITTEN AUTHORIZA770N.
AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE SUFFICIENT SPACE
AND APPROPRIATE TOPOGRAPHY FOR TIE CONSTTUCT70N OF A TEMPORARY IMPOUNDMENT.
3.18 OUTLET PROTECTION.*
SOIL DET'SCRIPTION
S7RUCTURALL Y LINED APRO q OR 0774ER ACCEPTABLE ENERGY DISSIPA TING DEVICES PLACED
SECTIONS. TO PREVENT SCOUR AT
278-ELIOAK LOAII TO 77 SLOPES, SOIL /S WELL DRAINED WITH A MEDIUM RUNOFF
STORMWATFR OUTLETS� TO PR07ECT THE OUTLET S7RUCTURE, AND TO MINIMIZE THE
CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE
POTENTIAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF
DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80" '
CONCENTRATED STORMWATER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPES AND
27C-ELIOAK LOAM-7 TO 157 SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF
ENGINEERED CHANNEL SECTIONS
CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE
3.19 RIPRAP:
DEPTH TO THE WA TER TABLE IS GENERALLY MORE THAN 80'�
A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE NTH
J90-HAZEL LOAM-15 TO 25% SLOPES. SOIL IS EXCESSIVELY DRAINED WITH A MEDIUM
FILTER FABRIC OR GRANULAR UNDERLINING. TO PR07ECT THE SOIL FROM THE EROSIVE
RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-10"
FORCES OF CONCEN7RATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE
THICK THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80".
ENHANCING THE P07EN77AL FOR INFIL7RA770N, AND TO STABILIZE SLOPES W77-1 SEEPAGE
PROBLEMS, ANDIOR NON -COHESIVE SOILS USE WHEREVER SOIL AND WATER INTERFACE
REFERENCE., WEB SOIL SURVEY ONLINE DATABASE, FOUND AT
AND TIE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETA77VE
http://�ebsoilsurvey.nrcs.usda.govloppIWebSoilSurvey.aspx
COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE DESIGN FLOW CONDITIONS.
3.25 U77LITY STREAM CROSSING.,
A S7RA7EGY FOR CROSSING SMALL WATERWAYS WHEN IN-S7REAM U77LITY CONSTRUCTION IS
INVOLVED. TO HELP PR07ECT SEDIMENT FROM ENTERING 7HE STREAM FROM CONSTRUCTION
EROSION CONTROL NOTES
WTHIN APPROACH AREAS. TO MINIMIZE THE AMOUNT OF DISTURBANCE WITHIN THE STREAM
ITSELF. GENERALLY APPLICABLE TO FLOWING STREAMS WITH DRAINAGE AREAS LESS THAN
ES-1: UNLESS OTHERWISE INDICA TED, ALL VIEGETA 77VE AND STRUCTURAL EROSION
ONE SQUARE MILE.
AND SEDIMENT CONTROL PRAC77CES WILL BE CONSTRUCTED AND MAINTAINED
ACCORDING TO MINIMUM STANDARDS AND SPECIFICA77ONS OF THE VIRGINIA
3.31 TEMPORARY SEEDING,
THE ESTABLISHMENT OF A TEMPORARY VEGETA77VE COVER ON DISTURBED AREAS BY SEEDING
EROSION AND SEDIMENT CON7ROL HANDBOOK AND VIRGINIA REGULA77ONS VT
WIN APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND
625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS.
SEDIMENTA 77ON BY STABILIZING DIS77JRBED AREAS 7HA T WLL NOT BE BROUGHT TO FINAL
ES-2.7HE PLAN APPROVING AUTHORITY MUST BE N077FIED ONE WEEK PRIOR TO
GRADE FOR A PERIOD OF MORE THAN JO DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND
7HE PRE-CONSTRUC77ON CONFERENCE, ONE WEEK PRIOR TO THE
RUNOFF TO DOMS7REAM OR OFF -SITE AREAS, AND TO PROVIDE PR07EC77ON TO BARE
COMMENCEMENT OF LAND DIS71IRBING ACT70TY AND ONE WEEK PRIOR TO
TABLE 3.31-B
ACCEPTABLE TEIVIPORARY SEEDING PLANT MATERIAIS
NQUICK REFERENCE FOR ALL REGIONS"
Rai
ig Dates Species Q&j
- Feb. 15 50/50 Mix of
Annual Ryegrass
(Lolium multi-flonun)
& R0
Cereal (Winter) Rye
acojg, cu-caW
i - Apr. 30 Annual Ryegrass 60
(Lolium multi-florum)
- Aug 31 German Millet
(Setaria italic )
SOILS EXPOSED DURING CONSTRUCTION UIV77L PER14ANENT VEGETA77ON OR OTHER EROSION THE FINAL INSPECTION. �
CONTROL MEASURES CAN BE ESTABLISHED. ES-J.,ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR Source: Va. DSWC
TO OR AS THE FIRST STEP IN CLEARING.
3.32 PERMANENT STABILIZATION. ES-4. A C Y THE APPROVED EROSION AND SEDIMENT CON]FROL PLAN SHALL
THE ESTABLISHMENT OF PERENNIAL VEGETA 77VE COVER ON DISTURBED AREAS BY PLANTING BE MAIN TAINED ON THE SITE AT ALL TIMES.
SEED. TO REDUCE EROSION AND DECREASE SEDIMENT WELD FROM DISTURBED AREAS TO ES-5*PRIOR TO COMMENCING LAND DISTURBING ACTIW77ES IN AREAS OTHER 7HAN
PERMANENTLY STABILIZE DIS77JRBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE
TO S17F CONDITIONS, AND ALLOWS SELEC77ON OF THE MOST APPROPRIATE PLANT MATERIALS
TO IMPROVE WILDLIFE HABITAT TO ENHANCE NATURAL BEAUTY UPON COMPLE77ON OF BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A
CONSTRUCTION ACTIVITIES, ALL AREAS WILL RECE/W A PERMANENT VEGETATIVE COVER. SUPPLEMENTARY EROSION CON7ROL PLAN TO THE OWNER FOR REVIEW AND
APPROVAL BY 7HE PLAN APPROVING AU7HORITY.
3.38 TREE PRESERVA770M AND PROTECTION: ES-6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDIT70NAL
PROTEC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
DISTURBING AND CONSTRUCTION ACTIVITY TO ENSURE 7HE SURVIVAL OF DESIRABLE 7REES SEDIMENTA77ON AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
WERE THEY WLL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL, WATERSHED ES-7.,ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
PRI LANDSCAPE BEAUTIFICATION, DUST AND POLLU77ON CONTROL, NOISE REDUCTION, MEASURES AT ALL 77MES DURING LAND DISTURBING ACTIV471ES AND DURING
SHADE AND 07HER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONWRTED FROM S17E DEVELOPMENT UN77L FINAL STABILIZA77ON IS ACHIEVED.
COMPACTIM) SOIL �__ 3' KINIII ___�
FILTER FABRIC
ENTRENCHED 6"
-
I
I I I -
ter 10. zIII �
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G TEMPORARY 18"
DIVERSION
BERM
. I 11 ."Y_ I 11� . �11�1 1I`Y ,��'.. . �.� 1..'�� I 11 Lm. ES-8., DURING DEW4 TTRING OPERA TONS, WA TER WILL BE PUMPED IN TO AN
DISTURBING ACTIVITIES. APPROVED WATER FILTERING DEVICE.
ES-9.7HE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES 1. SET POSTS AND EXCA VA TE A 4"X4"
3.39 DUST CONTROL, PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT ANY
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON AND TRENCH UPSLOPE ALONG 7HE LINE
CONS7RUC77ON ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM NECESSARY REPAIRS OR CLEANUP TO MAINTAIN 7HE EFFEC77VENESS OF THE OF POSTS.
EXPOSED SOIL SURFACES AND REDUCE 7HE PRESENCE OF AIRBORNE SUBSTANCES WHICH EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY
MA Y PRESENT HEAL 7H 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 - ��-� ,:�7-
ACCORDANCE NTH THE VESCH. I - - �5_7 I-
I , _�,
i
TABLE 3.39-A
ADHESIVES USED FOR DUST
CONTROL
Water
Application
Dilution
Type of
Rate
Adhesive
(Adhesive: Water)
Nozzle Gal ons/Acre
Anionic
Asphalt Emulsion
7:1
Coarse Spray
1,200
Latex Emulsion
12.5:1
Fine Spray
235
Resin in Water
4:1
Fine Spray
300
Acrylic Emulsion
(Non -Traffic)
7:1
Coarse Spray
450
Acrylic Emulsion
(Traffic)
3.5:1
Coarse Spray
350
Source: Va. DSWC
GENERAL SLOPE (31 OR LESS) PER ACRE I I 1_�
TOTAL LBS �
KENTUCKY 31 FESCUE 128 LBS.
RED TOP GRASS 2 LBS.
SEASONAL NURSE CROP 20 LBS.
SEASONAL NURSE CRO 150 LBS
FEBRUARY 16 THROUGH APRIL ANNUAL RYE
MAY 1 THROUGH AUGUST 15 FOXTAIL MILLE[
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 STE) 3.35.
PERMANENT SEEDING SCHEDULE
(�� NO SCALE
(STD. & SPEC. 3.32 OF VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK, 3RD ED.)
_� -1 :
- -
-111
-I11-111-
FLOW III III I ��J__I I I�
J. ATTACH THE FILTER FABRIC TO
THE WIRE FENCE AND EX7END
IT INTO THE TRENCH.
_�_
, �_
,�_11_
2. STAPLE WIRE FENCING TO
4. BACKFILL AND COMPACT THE
EXCA VA TED SOIL.
EXTENSION OF FABRIC AND WIRE INTO THE TTENCH.
,!WPER SILT FENC5
,
(9 (WITH WIRE -BACK ED
NO SCALE
1992
11. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOW ON 7HE PHASE fl EROSION CONTROL PLAN.
TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONMOL SHALL BE IMPLEMENTrD AS REQUIRED.
12. PERMANENT OR TEMPORARY SOIL STABILIZAT70N SHALL BE APPLIED TO DENUDED AREAS W7HIN SEVEN DAYS AFTER FINAL GRADE IS
REACHED ON ANY PORT70N OF THE SITE. TEMPORARY SOIL STABILIZA77ON SHALL BE APPLIED WTHIN SEVEN DAYS TO DENUDED
AREAS 7HA T MA Y NOT BE A T FINAL GRADE BUT KILL REMAIN DORMANT (UNDISTURBED) FOR LONGER 7HAN 30 DA Y5. PERMANENT
STABILIZA 77ON SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
13. ONCE 7HE SITE IS ROUGH GRADED, THE CON7RACTOR SHALL BEGIN PHASE N OF THE EROSION & SEDIMENT CONTROL PLAN. 7HE
CONTRACTOR CAN BEGIN INSTALLA770M OF 7HE UTILITIES, CURB AND GUTTER, AND ROADS. INLET PR07EC77ON SHALL ALSO INSTALLED
AS THE STORM SEWER IS CONSTYUCTED. INLET PR07EC77ON SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL
BE MADE AS NEEDED. IF THE STONE FIL TER BECOMES CLOGGED NTH SEDIMENT SO TIA T IT NO LONGER ADEQUA TEL Y PERFORMS ITS
FUNCTION, THE STONE MUST BE PULLED A WAY AND CLEANED ANDIOR REPLACED.
14. TIE CONMACTOR SHALL WORK NTH THE ESC INSPECTOR ON 7HE TIMING OF THE REMOVAL OF SEDIMENT TRAPS #1 & #2. SEDIMENT
7RAPS #1 & #2 SHALL BE REMOVED AFTER THE STORY SEWER AND INLET PR07ECTION ARE INSTALLED AND ARE MADE OPERA RONAL.
TIE CONTRACTOR SHALL FILL SEDIMENT TRAPS #1 & #2 AS 7HESE LAST AREAS ARE BROUGHT UP TO FINISHED GRADE AND PAVEDI
SEEDED. THE CONTRACTOR SHALL PA Y SPECIAL A TTEN77ON TO THE SIL T FENCE BENEA 7H THESE AREAS A T THIS 77ME AND ENSURE IT
CON77NUES TO BE EFFECTIVE.
15. ONCE PHASE N OF CONS7RUCT70N IS COMPLETE, THE S17F IS STABILIZED AND 7HE INSPECTOR HAS GIVEN APPROVAL, THE
CONTRACTOR CAN THEN CONVERT SEDIMENT TRAP #J INTO THE PROPOSED SWU FACILITY & INSTALL 77-IE PROPOSED LEVEL
SPREADER. AT TVIS TIME, THE CONTRACTOR CAN REMOVE NE REMAINDER OF 7HE EROSION & SEDIMENT CONTTOL MEASURES. NO
17EM SHALL BE REMOVED, THROUGHOUT ALL PHASES OF CONSTRUCTION, UNLESS 7HE UPSTREAM AREAS ARE STABILIZED AND 7HE
INSPECTOR GIVES PERMISSION.
16. 7HE CON7RACTOR SHALL MAINTAIN ALL EROSION CONDTOL MEASURES AS SPECIFIED IN 7HE VIRGINIA EROSION AND SEDIMENT
CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY 77-IE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE K177-1 77-IE VIRGINIA
EROSION AND SEDIMENT CON7ROL HANDBOOK.
1Z ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZAT70N
OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM
ADMINISTRA TOR TRAPPED SEDIMENT AND 7HE DISTURBED SOIL AREAS RESUL77NG FROM THE DISPOS177ON OF TEMPORARY MEASURES
SHALL BE PERMANENTLY STABILIZED TO PREVIENT FURTHER EROSION AND SEDIMENTATION.
3.01 1992
- M'' 111
III
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Plate 3.38-2
-70* VIN,
3' SM-2A ASPHALT TOP
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1,.,��.�,-_,�. 1'�Z_ �., I III
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PLYWOOD. JERSEY WPRIJICHI�
HAI OR 5KEI TR04CHING
RUNG5 CIPEPATION
T�__ PLACE RIPW
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I L � PERSPECTIVE VIEW -
Plate 3.01-1
Source: Va. DSWC
SECTION Az
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Andollt %ahe.qupphI au&,hhv�ewft a (WI of 1 5 &II lo adetpute
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NO SCIIII
-
DIVERSION CHANNEL CROSSING
ACCEPTABLE LININGS
(CROSS SECTION A -A OF PLATE 3.25-1)
SILT FENCE PI`� POST SILT FENCE
/
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POLYETHYLENE (5 MIL. VW.�
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EXJSTI� GROUND I EXISMW GROUND
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EXISYNG GROLIND -�., V ND
- 6' MINIMUM OR WIDTH OF EXISTING STREAM WHICHEVER IS LESS
-- ENTRENCH SILT FENCE AND FLIER CLOTH IN SAK tKHI
I
Plat.3.25.1 Source: Adapted from VDOT Standard Sheets
3.25
Plate 3.25-2
SCOTT/R. C73-LLINSZ
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PROPOSED LIMITS
A -A
OF DISTURBANCE
IJKUPUbt: LIMITS
OF DISTURBANCE
EXIS I ING STREAM
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PROPOS�D LIMITS
OF TREE CLEARING PAPOSED 'SAFETY FENCE,
4!lNb I ALL SIGNS "WARNING/ ol
PROPOSED bUTF E p ,�e,,QUICK SAND, KEEP OUT" PROPOSED
ALL,SL:E -FOCKPILL
ALL S 41-
SWM SHEETS FOR DEiTAILS / 4
SURROUNDED
7
V", N
BY SILT FENCE
-Ij �x r)p
r PHASE I DRA NAGE AREA TO
D SEDIMENT TRAP #2 2.06 ACRES
F
STEEP SLOPES (TYP.) S% r-4
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EXI_5��INMANAGE I �WIRE' t4l uj
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LIMITS OF DISTURBANCE APPROVED SOIL DESCRIPTION (TYR)
SOIL BOUNDARY gyp)L�z WITH WP0202000004 - BROOKHILL Cb
BLOCKS 9, 10, & 11 VSMP PLAN T
-Sui DESCRIPTION w It 0 1 L Y-PE
:(TYP /WIRE S yp�
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SOIL�YPE nTp
27C
PROPOSED 18" DIVERSION. CONTRACTOR '0\
PROP 8" 151VER TOR ----
OSED I St6N. CONTRAc SHALL ENSURE POSITIVE SLOPE I
SHALL ENSURE POSITIVE SLOPE IS DID CY)
PROPOSED FLOW BARRIER (SANDBAG 3, PLYWOOD, JERSEY BARRIERS OR MAINTAINED. BERM SHALL BE STABILIZED MAINTAINED. BERM SHALL BE STABILIZED r Lu
EQUIVALENT). SEE SHEET 3 FOR ADDITIONAL STREAM CROSSING DETAILS. I
AS A FIRST STEP IN DISTURBANCE.�
CONTRACTOR SHALL REMOVE PROPOSED FLOW BARRIER & STREAM AS A FIRST STEP IN DISTURBANCE.
DIVERSION ONLY AFTER THE CULVERT INSTALLATION HAS BEEN COMPLETED, PROPOSED RIPRAP' PROP 65ED SAFETY FENCE, SIF W/WIRE/' Co
RR 'WARNING SU7ORT
_j
ACCEPTED BY VDOT AND THE ESC INSPECTOR GRANTS APPROVAE AT TRANSITION imITS CY)
SAF INSTALL SIGNS' PROPC ED L
QUICK SAND, KEEP OUT" CN 0
OF DIS URBAN-_C
EAIS�TIN'G SWM OUTFALL TO BE RE-
c1l)
PRIOR TO THE INSTALLATION OF THE PROPOSED
STREAM DIVERSION & CULVERT CROS
POSED LIMITS
lb OF TREE CLLARINU V)
(N
DIJI L �\T �E >
Swm FACILITY APPROVED WITH *WIR!E-- CY)
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WP0202000004 - BROOKHILL Rl!�
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P Po :D ALIGNMENT CONTRACTOR SHALL INSTALLAND MAINTAINA6'WIDE WITH 2:1SIDE SLOPESTYPE B STREAM Lij
-\\STREAM DIVERSION WHILE
FLOW DIVERSION PER DIVERSION CHANNEL CROSSING VESCH DETAIL 3.25-1 AND 3.25-2 DURING
us LLJ
CULVERT IS INSTALLED L ENTIRE CULVERT CONSTRUCTION OPERATION.
y I - -_ - 2. SILT FENCE SHALL BE INSTALLED ON BOTH SIDES OF THE PROPOSED STREAM DIVERSION CHANNEL. 0 Lu Lu
PROP S D LIMI
OF DjSTURBAN E
THE CONTRACTOR SHALL INSTALL AND ADJUSTSILT FENCE AS NECESSARYTO PREVENT SOIL FROM
L9
V ENTERING STREAM. RIPRAP SHALL BE PROVIDED WITHIN THE EXISTING STREAM BED ATTHE 0
O\
TRANSITION FROM THE EXISTING STREAMBED TO THE PROPOSED DIVERSION CHANNEL, AND AT < Lu
THE TRANSITION BACK FROM THE DIVERSION CHANNEL TO THE EXISTING STREAMBED. AN Lu (f)
PROPOSED SAFETY FENCE APPROVED FLOW BARRIER (SANDBAGS, PLYWOOD, JERSEY BARRIER, OR EQUIVALENT) WILL BE
0 0
INS I ALL SIGNS "WARNING' SAF INSTALLED BEHIND THE RIPRAP TRANSITION. > 06
v QUICKSAND KEEP Oul /3- THE DIVERSION CHANNEL CROSSING MUST BE OPERATIONAL BEFORE WORK IS PERFORMED IN THE
0
/A RIPRAP STREAM (CONSTRUCTION OF DIVERSION SHALL BE PERFORMED "IN THE DRY").
O\ SOIL TYP� IRR PROPOSED UPON COMPLETION OF THE CULVERT CONSTRUCTION AND WITH INSPECTOR APPROVAL, THE
Al 11-161TION 4. w
CONTRACTOR SHALL REMOVE THE STREAM DIVERSION AND ALLOW STREAM FLOW TO RESUME UJ
THROUGH THE CULVERT. 0
0�\
`�14_` 1 RUCTION ENTRANCE WASHOFF RUNOFF.
�,PROPOSED FLOW BARRIER (SAI 'T_H F� M
TRAP #1 TO'BE UTILIZEDIFOR - V KIN _T/REA COVEI�ED UNDER VIRGIN I�A WATER PROTECTION (V
, \ I DBAGS, PLYWOOD, JERSEY BARRIERS OF T NUMBER 16-1133 FOR THE BROOKHILL PROJECT. Co U Lu
O\ EQUIVALENT). SEE SHEET 3 FOR ADDITIONAL STREAM CROSSING DETAILS. INDIVIDUALPERMI ul
ST1 CONTRACTOR SHALL REMOVE PROPOSED FLOW BARRIER & STREAM 0� 14
A\ If DIVERSION ONLY AFTER THE CULVERT INSTALLATION HAS BEEN COMPLETED, Lij < Lu
ol w Lf)
ACCEPTED BY VDOT AND THE ESC INSPECTOR GRANTS APPROVAL.
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C� > w/WIRE
00 PHASE I DRAINAGE AREA TO )SUPPORT
I SEDIMENT TRAP #2 - 0.48 ACRES NC
DRAINAGE DIVIDE 11 IS, LIMITS'dF'DISTURBA /'E APPROVED
C OPOS'�D CONTRACTOR' I D WITH WP0202000004 - BROOKHILL LEGEND LEGEND 0
C�OR BLOCKS 9, 10, & 11 VSMP PLAN GR�pffl� SCALE SAFETY FENCE PER VESCH 3. 01 LIMITS OF LAND DISTURBANCE C:)
PARKING & STAGING AREA I PROPOSED 18" DIVERSION. CONTRA
SHALL ENSURE POSITIVE SLOPE IS 8 C:)
CONSTRUCTION ENTRANCE PER VESCH 3.02 DIVERSION DIKE (N
MAINTAINED. BERM SHALL BE STABILIZED
AS A FI T,STEP IN DISTURBANCE. SUPER SILT FENCE PER VESCH 3.05 BOUNDARYLINE
—SSF—SSF—
vd, SILTFENCE
PROPOSED CO IN F�ET INLET PROTECTION PER VESCH 3.07 DIRECTION OF FLOW
WA HOLT AREA inch 7 40 f 1�1
THE FUELING TANK SHALL BE C �ELY WO NO D YA 653.75— PROPOSED CONTOUR
0 'E" �E'PI 2'WIIDE ' /1� u
.�M 6 // B DIVERSION DIKE PER VESCH 3.09 u
Lu
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DRAINAGE DIVIDE 0
C - - - - - - - - -
C� EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE LINING, OR BE PLA 'ED IN AN/ RIGHT OF WAY DIVERSION PER VESCH3.11
IMPERVIOUS OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER SHALL SOILS LINE a- (n
LOCATION OF FUELING A EA CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME SEDIMENT TRAP PER VESCH 3.13 JOB NO.
WATER WAY
OUTLET PROTECTION PER VESCH 3. 18
& NUMPSTd CAPACITY IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL TREELINE 182150
ICATION OF 15c\v
PROPOSED PAVED CONSTYUCTION ENTRANCE TEMPORARY SEEDING PER VESCH 3.31 SCALE
0� (12'00' MIN.) w/ WASH RACK & DOWN GRADIENT --- EXISTING PRESERVED PERMANENT SEEDING PER VESCH 3.32 PRESERVED SLOPES
10 DIVERSION - SEDIME�T TRAf PING DEVICE STEEP SLOPES (TYP.) MANAGED SLOPES 1 it =40'
I \ \1 % SWM FOREST &
SOIL STABILIZATION BLANKET PER VESCH 3.36
LO TION OF -- ------ OPEN SPACE EASEMENT SHEEFNO.
C� \ , \ \I V\ TREE PROTECTION TAPE PER VESCH 3.38
1 0
PORTA-POTTIES v
CH 3.39 4
DUST CONTROL PER VES
1� 4b.—
IM
4� + sC( LINSZ
0
U Lic. No. 035791,��
16 8/22/22
S"tOINVAL S
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0
FKUFUSED LIMITS
401, N-av, 6
5�
FIKUFU�DED LIMITS
OF DISTURBANCE
, / _/ Z' SF Lu
EXISTING STREAM OF DISTURBANCE / / / / / / I I \N
PROPOSED 18 DIVERION. CONTRACTOR
PROPOSED /LIMITS SHALL ENSURE POSITIVE SLOPE IS tie
OF TREE L�ARING PAPOSED SAFETY FENCE, MAINTAINED. BERM SHALL BE STABILIZED
�5� A
ANSTALL SIGNS "WARNING/ AS A ;PST STEP IN DISTURBANCE. E,
QUICKSAND, KEEP OUT" 4-i PROPOSED'
> PROPOSED bUTFALL SEE
SWM SHEETS FOR DETAILS STOCKPILE
sAF--- 4F
PROPOSED VDOT STD. EC-1, CLASS AI RIPRAP LINED OUTLET PROT C ON WITH FILTER FAB 'IC BY SILT F
ENCE 4f
UNDERLAYMENT (L=19'±, W1=10', W2=19', D=18"). STONETO BE INSTALLED FLAT&TO EXTEND T 4f
THE CHANNEL'S BANK. FILTER FABRIC SHALL BE KEYED INTO THE EXISTING GROUND AT A MINIMUM
OF 9" AT THE END & ALONG THE PERIMETER. EDGES OF FYRIC SHALL OVE qSF
r iq
111IN. Or 9 r-i
IRE
SUPPORT r14
XISTING MANAGED
L
P SLOPES (TYP.) LIMITS OF DISTURBANCE APPROVED-
STEE PHASEIII 00
009, 1� 1� WITH WP0202000004 - BROOKHILL DIMENT TRAP ;F3 l.q.J AU
"BLOCKS 9, 10, & 11 VSMP PLAN ST _SE
s
TP S w/WIRE E
UPPORI w/WIRE
F 0
IP IRT C
D UPSTREAM ERGY DISSIPATER, DD
FIKUPOSED VDOT CL. AI RIPRAP LINE
FILTER FABRIC UNDERLAYMENT. FILTER FABRIC TO BE KEYED INTO --------- ------ DC
DRAIN GE DIVIDE (TYP.)
THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS AND ALONG THE
PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A IINIMUM OF Lu r�_
12". ENERGY DISSIPATER DIMENSIONS: 35' LONG, 10'WIDE AT THE�`
L.ULYCKI IAIN,� WPE AT THE END. S�PNE THICKNESS= IS." \
0�
vy,/ wl
>
3' SUPPYRT
PROPOSED LIMITS
CN
AUt AKtA I r) OF DI URBANCE
SEDIMENT TRAP #2 = 1.1
X, -440r-
0
z PR POSED LIMITS
KEE CLEARING >
04 U)
C:)
SWM FACILITY APPROVED WITH CY) >
-v4 Wl R E_
WP0202000004 PROPOSED 18" DIVERSION. CONTRACTOR
- BROOKHILL SHALL ENSURE POSITIVE SLOPE IS
CC, 10, & 11 VSMP PLAN
xz� I MAINTAINED. BERM SHALL BE STABILIZED
BLOCKS 9
ASA FIRST ST - EP IN DISTA7ANCE 0
<
>
0
�INAGE DIVIDE (TY ce 0
NG STREAM
LLi Ll
\10
K6PO/SED SAF�T46NCE,
X NSTALL SIGNS "WARNING' Lu
> 0
I ICK SAND, KEEP OUT" 0
WDC u
vd�\
H L DNAL AS LOI U) x
l"AS
POSSIBLE, AS DESIGNED& SHOWN. SEDIMENT TRAP j Lu F-
F Lu
OT BE REMOVED UNTIL THE UPLAND STORM SEWER IS LLJ
\.PROPUDLU L11-11 I a7 \ND IS OPERATIONAL. SEDIMENT TRAP #2 SHALL NOT 0 Lu 2:
OF'OISTURBANJE _B� REMOVED NTIL THE ES/C INSPECTPR APPRCV S ITS REMOVAL.
w/WIRE uj
\0\ PPORT < 2:
0\ -46 L% T_ Lu
/Su
0 > C6
DROP SED SAFETY"FENCE,
0
C� INSTALL SIGNS "WARNING \A/
QUICK SAND, KEEP OUT"
v 0
C�
f
Lu Lu U) 0
> _0p
C� 0 >
/�EDIMENT TRAP #1 TO BE LITILIZED-FOR DR CL. Al RIPRA'P LINED DOWNSTREAM 0 T PR TECTION, WITH FI ER FABRIC
V P SED VDOT
UNDERLAYMENT. FILTER FABRIC TO BE KEYED INTO THE EXISTING GROUND A MINIMUM OF 91, AT THE ENDS AND cj�
NOFF. co Lu
ALONG THE PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A MINIMUM OF 12". ENERGY DISSIPATER
I , , ul
CONSTRUCTION ENTRANCE WASHOFF RUNOFF.
DIMENSIONS: 16.' LONG, 10' WIDE AT THE CULVERT AND 25'WIDE AT THE END. STONE THICKNESS=18"
Lu
PROPOSED 18" DIVERSION. CONTRACTOR
—SHALL ENSURE POSITIVE SLOPE IS Lu
LLI
v(j MAINTAINED. BERM SHALL BE STABILIZED <
AS A FIRST S7P IN DISTYRBANCE
wl p =
)PPORI �2 C/) _j
A
F_
Lu
>
w/WIRE EXISTING STREAM ry
X PHASE II DRAINAGE AREA T
0
40p, )�)SUPPORT
—::::::45
zz SEDIMENT TRAP #1 0.48 ACI
DRAINAGE DIVIDE (TYP\)\ RS IMITS-dF'DI'STURBA 'CE A(PPROVED
LEGEND LEGEND
WITH WPO 02000004 - BROOKHILL 0
2
PROI
ONTRACTOR"' DD 'BLOCKS 9, 10, & 11 VSMP PLAN SAFETY FENCE PER VESCH 3. 01 LIMITS OF LAND DISTURBANCE C:)
PARKING & STAGING AREA
CONSTRUCTION ENTRANCE PER VESCH 3.02
PROPO ED 18" 6�v 'SION . C6NT' R 0 4 44 4 DIVERSION DIKE
SHALL ENSURE POSITIVE SLOPE is SUPER SILT FENCE PER VESCH 3.05 mmvmffimmm� BOUNDARYLINE
MAINTAINED. BERM SHALL BE STABILIZED SILT FENCE w
PROPOSE6 CO RETE INLET PROTECTION PER VESCH 3.07
C) AS A FIRST STEP IN DISTURBANCE.
WA H, Ui DIRECTION OF FLOW
ktuj DIVERSION DIKE PER VESCH 3.09 u 0
THE FUELING TANK SHALL BE CO LETELY kkOUNDED BY A 2' DEEP, 2� WIDE —653.75— PROPOSED CONTOUR Lu tu- E
EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE LINING, OR BE PLACED IN AN/ RIGHT OF WAY DIVERSION PER VESCH 3AI - - - - - - - - - DRAINAGE DIVIDE 0 6
vc� IMPERVIOUS OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER SHALL
L CATION OF FUELING A EA CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME SEDIMENT TRAP PER VESCH 3.13 SOILS LINE JOB NO.
WATER WAY
CAPACITY IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. GRAPHI SCALE OUTLET PROTEC77ON PER VESCH 3.18 . . .... — 9�
LOCATION OF 15cy bUMPST6IRr TREELINE 182150 0
0
2� 40 8. 0
-PROPOSED PAVED CONSffUCTION ENTRANCE TEMPORARY SEEDING PER VESCH 3.31 SCALE 0
CE (12'00' MIN.) w/ WASH RACK & DOWN GRADIENT EXISTING PRESERV PERMANENT SEEDING PER VESCH 3.32
10 ED PRESERVED SLOPES
0�\ It c
DIVERSION SEDIMENTT PPING DEVICE STEEP SLOPES (TYP.) MANAGED SLOPES 1 =40' 0
1�� �I9w" , I \ 1� SOIL STABILIZATION BLANKET PER VESCH 3.36
IN �FEET C
--------- SWM FOREST & 0
1 inch 49 1 t. - j OPEN SPACE EASEMENT SHEEFNO. 0
LOCATION OF d\ TREE PROTECTION TAPE PER VESCH 3.38
PORTA-POTTIES 0
5
DUST CONTROL PER VESCH 3.39
Z_
452 r
00"
62
z on
In
Z
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lz�
lo�
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>
SWM SHEETS FOR DETAILS
FROF OSED VDOT STD. EC-1, CLASS AI RIPRAP LINED OUTLET PROTE`CTION WITH FILTER 'FABRIC
UNDERLAYMENT (L=19'±, Wl=lo" W2=19', D=18"). STONE TO BE INSTALLED FLAT &TO EXTEND TO
THE CHANNEL'S BANK. FILTER FABRIC SHALL BE KEYED INTO THE EXISTING GROUND AT A MINIMUM
OF 9"AT THE END & ALONG THE PERIMETER. EDGES OF FTRIC SHALL OVE P MIN. OF 9,-,
�XISTING MANAGED
STEEP SLOPES (TYP.), LIMITS OF DISTURBANCE APPROVED
WITH WP0202000004 - BROOKHILL -
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PROPOSED 3.8" DIVERsioTj.
PROPOSED LIMITS CONTRACTOR SHALL ENSURE
OF TREE CLEARING PeOPOSED SAFETY FENCE' POSITIVE SLOPE IS MAINTAINED
/INSTALL SIGNS "WARNING BERM SHALL BE STABILIZED AS A
QUICKSAND, KEEP OUT" FIRST TEP IN DISTURBANCE
SAF
SUPPORT
T
00
BLOCKS 9, 10, & 11 VSMP PLAN
/WIR SF
w/WIRE
IP F
SED VDOT CL. AI RIPRAP LINED UPSTREAM ERG DISSIPATE.
WITH FILTER FABRIC UNDERLAYMENT. FILTER FABRIC TO B KEYED INTO
THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS AND ALONG THE L9 Ir
PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A MINIMUM OF r�_
12 E N ERGY DISSIPATER DIM ENSION S: 35' LONG, 10' WI D E AT TH E IV?
CULVERT AND-16'WPE AT THE E S w/WIRE <
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- O\ 7�-* GEOTEXTILE FILTER FABRIC UNDERLAYMENT. FABRIC TO BE KEYED INTO EX.
O�\ GROUND 9" MIN. AT ENDS & ALONG PERIMETER. FABRIC TO OVERLAP A MIN. OF 9" 0
v (L=10', W1=4', W2=10', D=18" MIN.)
Z/ / r- y
op t Lu 0
Lu
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7 OSEDVDOTCL. AI RIPRAP LINED DO'WN'ST'REAm uT TPROTECT WITH �LfElk B /
UNDERLAYMENT. FILTER FABRIC TO BE KEYED INTO THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS AND
V /WIRE ALONG THE PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A MINIMUM OF 12'.. ENERGY DISSIPATER U) U UJI
PPO DIMENSIONS: 16' LONG, 10' WIDE AT THE CULVERT AND 25'WIDEATTHE END. STONE THICKNESS= 18" ul F__4
A,
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LEGEND LEGEND
ITH WP0202100004 - BROOKHILL (D 0
'BLOCKS 9 10, & 11 VSMP PLAN SAFETY FENCE PER VESCH 3. 01 LIMITS OF LAND DISTURBANCE CD
CONSTRUCTION ENTRANCE PER VESCH 3.02 4 4 4 DIVERSION DIKE Co
BOUNDARY LINE
SUPER SILT FENCE PER VESCH 3. 05
f —SSF—SSF— SILT FENCE
GRAPHIC SCALE INLET PROTECTION PER VESCH 3.07 DIRECTION OF FLOW
40 0 �o 40
'SUkIiOUNDED BY A 2- 5EEP, 2'IWIDE 653.75— PROPOSED CONTOUR
tHE FUELING TANK SHALL B L �\E'L Y' u
0 E CO%M E DIVERSION DIKE PER VESCH 3.09
:ARTHEN BERM WITH A HEAVY MIL POLYETHYLENE LINING, OR BE PLACED IN AN/
RIGHT OF WAY DIVERSION PER VESCH 3. 11 - - - - - - - - - DRAINAGE DIVIDE 0 w
APERVIOUS OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER SHALL SEDIMENT TRAPPER VESCH 3.13 SOILS LINE ILn
0\ LOCATION OF FUELING EA CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME IN FEET WATER WAY JOB NO.
CAPACITY IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FUEL. I inch 40 ft. OUTLET PROTECTION PER VESCH 3.18
d`\ LOCATION'OF15cy UMPSTIR TREELINE 182150
31
Nv)CTIbN EXISTING PRESERVED PRESERVED SLOPES
1�� TEMPORARY SEEDING PER VESCH 3.
PROPOSED PAVED CONSTR SCALE
O\ PERMANENT SEEDING PER VESCH 3.32
ENTRANCE (12 x70' MIN.) STEEP SLOPES (TYP.) MANAGED SLOPES 1 11=401
LOCATION OF TREE PROTECTION TAPE PER VESCH 3.38
SOIL STABILIZATION BLANKET PER VESCH 3.36 --------- S WM FOREST&
0�\ PORTA-PoTTIES 0� OPEN SPACE EASEMENT SHEET NO.
DUST CONTROL PER VESCH 3.39 6
SEDIMENT TRAP #1 DETAIL
SCALE 1 "=20'
446-
A
Sediment Trap #1 Design
drainage area (acres) (<3)
0.48
trap volumes:
elevation (ft) area (so volume(co
volume(cy)
443 898 0
0.0
444 1174 1,033
38.3
446 1817 4,001
148.2
PR9POSED 2.9'x2O'
"P LINED SPILLWAY
BOTTOM ILEV.=444.00,
V
TOP ELE =445.00
5,-
PROPOSED SAFETY FENCE, 411"
INSTALL SIGNS "WARNING 4f
QUICK SAND, KEEP OUT" 14
1 11 wimiix . I
rTII1
ORGINW_ CREST OF STONE WEIR L �'_J
G�ND
ELIN. . Q�
DRYSTORAGE
WET STORAGE
(�ATED)
wet storage:
-ME PLATE 3 1�1
wet storage required (cy) (67*DA)
32.2
bottom of stone weir (ft)
444.0
wet storage provided at this elevation (cy)
38.3
slope of wet storage sides
2:1
weir length (ft) (6xDA)
dry storage:
bottom of trap elevation (ft)
dry storage required (cy) (67*DA)
32�2
bottom trap dimensions:
crest of stone weir
4450
top of dam elevation (ft)
dry storage provided at this elevation (cy)
490
top width of dam (R)
slope of dry storage sides
2-1
top trap dimensions
1992
1ARWI
�CINAL
G�.O
ELIN
C� AGGRECAR CI.ASS I RIPR�P
2.9
443
20111
446
4
321:K61'
SEDIMENT TRAP #2 DETAIL
SCALE 1 "=20'
\PROPOSE 12_.
\RIPRA\P LINEC PILL A
BOTTOM ELE =419.25
PROPOSED SAFETY f ENCI
INSTALL SIGNS "WARNIN
QUICK SAND, KEEP OUT"
-440-
ass ASS
- 27
-430-
Cb
TOP ELE .=42,1. 0
424--,,
�Ss ASS iss
ASS ass
4,101
0I
1 .0
Sediment Trap #2 Design
drainage area (acres) (<3) 206
trap volumes:
elevation (ft) area (so volume(co volume(cy) GROUND
417 1344 0 0.0
418 1664 1,501 55.6
420 2400 5,543 205.3
422 3264 11.185 414.2
I I, I vmiAiI I I
r7�
CREST OF STONE WEIR I I,, I
DRY STORAGE
WET STORAGE
0CAWTED>
wet storage:
-ME PLATE 113-1
wet storage required (cy) (67*DA)
138.0
bottom of stone weir (ft)
419.25
wet storage provided at this elevation (cy)
144.3
slope of wet storage sides
2:1
weir length (ft) (6xDA)
dry storage:
bottom of trap elevation (ft)
dry storage required (cy) (67*13A)
1380
bottom trap dimensions,
crest of stone weir
4210
top of dam elevation (ft)
dry storage provided at this elevation (GY)
1575
top width of dam (ft)
slope of dry storage sides
2-1
top trap dimensions
3.18
PIPE OUTLET COIVDITIONS
A A
L
`IPE OUTLET TO FLAT
REA WITH NO DEFINED
!HANNEL
L
0 %
d
F-4 -f-
SECTION A -A FILTER CLOTH KEY IN 6--9"; RECOMMENDED FOR ENTIRE PERIMETER
I
3do (MIN.)
PIPE OUTLET TO WELL
DEFINED CHANNEL
PLAN VIEW
a
0
It
SECTION A -A T _F
FILTER CLOTH KEY IN e-y'; RECOMMENDED FOR ENTIRE PERIMETER
NOTES: 1. APRON LINING MAY BE RIPRAP. GROUTED RIPRAP, GABION
BASKET, OR CONCRETE.
2. La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED
USING PLATES 3.18-3 AND 3.18-4.
3. d = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT
LESS THAN 6 INCHFS.
Source: Va. DSWC Plate 3.18-1
1992
V MAIL \ I
FILTER CLOTH �IUL
GROL0.D
" \ ft�
C�E �EGATE C�S I RP�
12.4
417
2ft4g
422
4!
4ft69
SILT FENCE CULVERT INLET
PROTECTION
..........
'DISTANCE IS 6' MINIMUM IF FLOW
LFLOW IS TOWARD EMBANKMENT
OPTIONAL STONE COMBINATION
FLOW
VDOT J3, #357 OR J5
TO REPLACE SILT FrNCE
HIGH VELOCITY OF FLOW IS EXPECXD
Source: Adapted from VDOT Standard
Sheets and Va. IDSWC
I RIPRAP
0
Plate 3.08-1
SEDIMENT TRAP #3 PETAI'L NOTE /'CONTPACT`0/R TO INSfA SA(M/FACIL'ITY RISER/,
SCALE 1 11=20 BARREL, AND OUTFALL PER PLAX ALL ORIFICES
SHALL REMAIN PLUGGED LIN THJE SEDIMENT TRAP IS 46*
CONVERTED TO A RMANENT SWM FACILITY. J*
PROPOSED VDOT STD. EC-1, CLASS Al RIPRAP LINED OUTLET
,TA
IT Tl'
RMI
PROTECTION WITH FILTER FABRIC UNDERLAYMENT (L=19'±, W1=10', TO PREVENT FLOTATION THE RISER BASE
W2=19', D=18'). STONE TO BE4NSTALLED FLAT & TO EXTEND TO --SHALL BE FIRMLY EMBEDDED 6" INTO AN 18"
STREAM THE CHANNEL's BANK. FILTER'FABRIC SHALL BE KEYED INTO THE THICKREIN FORCED CONCRETE FOUNDATION
LIMITS, TYP. EXISTING GROUND AT A MINIMUM OF 9" AT THE END &ALONG THE
PERIMETER. EDGES OF FABRIC SHALL OVERLAP A MIN.,OF 9". M�\ T IS 8�x&, AND -BURIED BELOW GROUND.
PROPOSED VDOT STD. EW-1
PROPOSED 24" HDPE BARREL
INV. IN=430.00, INV. OUI
L=lo4.74', S=9.55%
A
4S
0
15
0
X
PROPOSED 8 6'x36'
RIPRAP LINEDI SPILLWAY
PROPOSED SAFETY FENCE,
BOTTOM ELEV.=443, 010 INSTALL SIGNS "WARNING
TOP ELFV.=4451.,(06
QUICK SAND, KEEP OUT"
�4�RCP RISER
'PROPOSED
RIM=443.50
GRAPHIC SCALE
0 �O 40
IN FEET
1 inch = 20 ft.
Sediment Trap #3 Design
drainage area (acres) (<3)
1.43
trap volumes-
ORIGINAL CREST OF STONE WEIR
elevation (ft) area (so volume(cf)
volume(cy)
ORDUND
436 141 0
0.0
ELIN.
438 399 518
192
DRY STORAGE
440 783 1,679
622
442 1293 3,734
138.3
444 1926 6,932
256.7
WET STORAGE
4- MkC
446 2666 11,504
426.1
(DIC"TED)
FILTER CLOTH OfflGINAL
G�NO
wet storage,
6SEE PtAx xf�l
C� ACGREGATE CIASS I RIPRAP
wet storage required (cy) (67*DA)
95.8
bottom of stone weir (ft)
4430
wet storage provided at this elevation (cy)
197.6
slope of wet storage sides
2-1
weir length (ft) (6xDA)
86
dry storage:
bottom of trap elevation (ft)
436
dry storage required (cy) (67*13A)
958
bottom trap dimensions:
15�x 15'
crest of stone weir
4450
top of dam elevation (ft)
446
dry storage provided at this elevation (cy)
1439
top width of dam (ft)
12'
slope of dry storage sides
2-1
top trap dimensions
641:K64'
1992 3.07
GRAVEL CURB INLET SEDIMENT
FIL TER
GRAVEL FILTER 12
RUNOFF WATER WIRE MESH
FILTERED WATER
SEDI ENT
C NCR E GUTTER 12"� CURB INLET
SPECIFIC APPLICATION
THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS
WHERE PONDING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE
INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED
AREAS.
* GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE.
Source: Va. DSWC Plate 3.07-6
1992 3.36
TYPICAL ORIENTATION OF
TREA TMENT - I
(SOIL STABILIZATION BLANKET)
SHALLOW
SLOPE
ON SHALL SLOPES, STRIPS OF
NETTING PROTECTIVE COVERINGS
MAY BE APPLIED ACROSS
THE SLOPE.
BERM
WHERE THERE IS A BERM AT THE TOP OF THE SLOPE.
BRING THE MATERIAL UI THE BERM AND ANCHOR rr
BEHIND THE BERM.
STEU
SLOPE
ON ST SLOPES, APPLY
PROTECTIVE OUVIERINQ PARALLEL
TO THE DIRECTION OF FLOW
AND ANCHOR SECURELY.
4-
BRING MATERIAL DOWN TO A LEVEL AREA BEFORE
TERMINI THE INSTALLATION. TURN THE END
UNDER Ir AND STAPLE AT If INTERVALS.
DITCH FLOW
IN DITCHES. APPLY PROTECTIVE COVERING
PARALLEL TO THE DIRECTION OF FLOW.
USE CHECK SLOTS AS REQUIRED. AVOID
JOINING MATERIAL IN THE CENTER OF
THE DITCH IF AT ALL POSSIBLE
Source: Adapted from Ludlow Products Brochure Plate 3.36-1
1�
SC OTT /R.IC1,LLINS7�
Lic. No. 035791
8/22/22
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(SUB 202 00082)
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4,6 1 OF OLF\\w// A -Ev-3,
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55' OF CHNL. FLOW AT 5 ft/ s
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jTa
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Post -Development
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DA 4A
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1:36
2.06 2.06
T
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0
60 JERSHED SUMMARY FOR SUBAREA 4A
LOT — — — — — — — —
78 1 1� Area, 1-year Flow, 2-year Flow, 10-year Flow,
6
CN
LOT ac. cfs cfs cfs
J, LOT DA 4A (Pre-Dev.) 56 0.70 0.12 0.24 1.29
b2 GRA,' c LE
L T
76 30 60 12
60
LOT it WATERSHED SUMMARY FOR SUBAREA 4B Area, 1-year Flow, 2-year Flow, 10-year Flow,
63
LOT 63 CN
ac. cfs cfs cfs
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182150
SCALE
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SHEET NO.
8
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0
0
0
STORMWATER MANAGEMENT NARRATIVE: z op!
OVERVIEW
THIS PROJECT IS FOR THE EXTENSION OF ARCHER AVENUE AND IS PART OF THE
DEVELOPMENT. STORMWATER TREATMENT IS PROVIDED TO MITIGATE THE IMPAC
-494
P KHILL
OM
FOR THE
C�
ADDITIONAL DETAILS.
SEE THE ACCOMPANYING STORMWATER MANAGEMENT CALCULATIONS PACKET FOR
�L_Y_ r, SCOTT R.. LINS
PROPOSED IMPROVEMENTS AND THE PLANS COMPLY WITH PART IIS REQUIREMENTS. PLEASE
C)
j
U Lic. No. 035791
WATER QUALITY SUMMARY
------------
YO 8/22/22
-474-
THIS DEVELOPMENT REQUIRES THE REMOVAL OF 1.82 Ibs/yr OF PHOSPHOROUS. THIS A
47
REMOVAL RATE IS BASED ON THE DEQ VRRM SPREADSHEET. THE PHOSPHOROUS REMOVAL
RATE COMPLIANCE IS MET THROUGH TWO BEST MANAGEMENT PRACTICES. A LEVEL SPREADER A A A
OUTFALLING INTO A VEGETATED FILTER STRIP WITH TYPE B SOILS TREATS SUBAREA 4B. 7 101VAL
EXISTING
AFTER THE IMPLEMENTATION OF THIS BMP, A NUTRIENT CREDIT PURCHASE OF 1.00 Ibs/yr OF
PHOSPHOROUS HAS BEEN PROVIDED TO MEET THE REMAINDER OF THE WATER QUALITY
REQUIREMENTS. i�OUT�E29
-----------
z
WATER QUANTITY SUMMARY �7
THE PROPOSED ROAD EXTENSION CREATES TWO (2) CONCENTRATED OUTFALLS, WHICH ARE
TWO (2) POINTS 7/
- SHOWN AND LABELED ON THIS SHEET AS POINTS OF ANALYSIS #1 & #2. THE �7_
- OF ANALYSIS WERE USED IN THE CHANNEL AND FLOOD PROTECTION ANALYSES. EXISTING
1z_RUU_TET9_ 7Z- - - - - - - —
POINT OF ANALYSIS #1 IS DOWNSTREAM FROM SUBAREA 4A AND THE PROPOSED CULVERT -MRTFrBOMDJ— W
- CROSSING. POST -DEVELOPMENT RUNOFF IS CONVEYED TO A RIPRAP LINED OUTLET
- PROTECTION LOCATED IN THE STREAM's BED VIA NEW CONCRETE -LINED STORM SEWER. THE
'Ilk
- 2-YEAR DESIGN STORM IS NOT EROSIVE ON THE CONCRETE LINED PIPE AND RIPRAP OUTLET
M Z__
PROTECTION, AND THE 10-YEAR DESIGN STORM HYDRAULIC GRADE LINES ARE CONTAINED
WITHIN THE SYSTEM, AS SHOWN ON THE ROAD PLAN's SHEET 10. CHANNEL PR(
COMPLIANCE IS THEREFORE MET FOR POINT OF ANALYSIS #1 (SUBAREA 4A) VIA 9 VAC
VAC
9
25-870-66, SUBSECTION B.1.a (2-YR PEAK FLOW IS NOT EROSIVE IN MANMADE PIPES AND
RIPRAP). THE LIMITS OF ANALYSIS FOR THE CHANNEL PROTECTION TERMINATES AT POINT OF z
411#
ANALYSIS #1, THE STREAM's RIPRAP LINED BED, SINCE THE STREAM's DRAINAGE AREA IS 100 _7�4 <
TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF SUBAREA 4A. THE STREAM's *4t#
DRAINAGE AREA IS 79.20 ac., AS SHOWN ON THE ROAD PLAN's SHEET 11, AND SUB.... 4,.
DRAINAGE AREA IS 0.70 ac. THIS SUBSECTION 15 BA.a. FLOOD PROTECTION IS MET FOR U
Ln cc
SUBAREA 4A VIA 9 VAC 25-870-66, SUBSECTION C.2.a (CONFINES THE POST -DEVELOPMENT W Z)
-C .. 0 U)
10-yr PEAK FLOW). PLEASE NOTE, THE AFOREMENTIONED STORM SEWER ANALYSIS CONFIRMS X z
��* ) / ) , 7 - , 0
SUBAREA 4A's RUNOFF IS CONTAINED WITHIN THE CLOSED STORM SEWER NETWORK. THE IfO
Y�
S
;IS
FLOOD PROTECTION ANALYSIS FOR SUBAREA 4A TERMINATES AT POINT OF A� 1 —47 F-
SINCE THE SITE's CONTRIBUTING DRAINAGE AREA (SUBAREA 4A) IS LESS THAN OR EQUAL TO �4 p.
1% OF THE TOTAL STREAM's WATERSHED. THIS SUBSECTION IS C.3.A. THIS METHODOLOGY 474
FOR CHANNEL AND FLOOD PROTECTION COMPLIANCE FOR POINT OF ANALYSIS #1 IS
CONSISTENT WITH THE PREVIOUSLY APPROVED BROOKHILL REZONING STORMWATER
- 44�
MANAGEMENT MASTER PLAN. 1 444 - — P-1, EXISTING SWM FACILITY-,
LOT FJUill I Ut- ANALYSIS 4FZ
LEVEL 11 WET D REMAIN UNDISTURBED Uj
POINT OF ANALYSIS #2 IS DOWNSTREAM FROM A PROPOSED DRY DETENTION BASIN NAMED
DETENTION BASIN 4. DETENTION BASIN 4 PROVIDES STORMWATER QUANTITY TREATMENT, LOT LOT -POND
'BUT NOT STORMWATER QUALITY TREATMENT, AND DISCHARGES RUNOFF FROM LOT 23 24 43� Ice
POST -DEVELOPMENT SUBAREA 4B. CHANNEL PROTECTION IS MET FOR SUBAREA 4B VIA 9 VAC 22
-7 POST-DEV.
25-870-66, SUBSECTION B.3.a (ENERGY BALANCE). THE LIMITS OF ANALYSIS FOR SUBAREA
4B's CHANNEL PROTECTION TERMINATES AT THE OUTFALL SINCE SUBSECTION B.3.a IS SUBAREA 413:
SATISFIED. FLOOD PROTECTION FOR SUBAREA 4B IS MET VIA 9 VAC 25-870-66, SUBSECTION LOT 1.36 ac
C.2.b (POST -DEVELOPMENT 10-yr PEAK FLOW < PRE -DEVELOPMENT 10-yr PEAK FLOW). THE
q 3 1 CN=7-
LIMITS OF ANALYSIS FOR THE FLOOD PROTECTION ALSO ENDS AT THE OUTFALL wNU
Tc= 12
LOT,
SUBSECTION C.2.b IS MET. PLEASE SEE THE CALCULATIONS PACKET FOR DETAILS.
APPROVED
-- ------ 90' OF OLF w/ AEL
420' OF CHNL F1 OW
EV.
41
<
Zz 00
L L T
c
LOT LO 5
7
_OT T 77t
10
LO LOT LOT ......
14
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/APPROVE O(�
16 (SUB-29 k081)
It L9
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POINT OF ANALYSIS #1 z
Cy')
_j
454 - -
16303'
---SUBAREA 4A: C\l
Y '\ -
U_/Aj d"-- C:)
THE PROPOSED ARCHER AVENUE STORM CN 92 z
(N Uj
ROYIED BL CK 34 -Tc=()-.LU
SEWER INLETS COINCIDE WITH THE APPROVED
OT rl,
(SUBrPRO LOT BLKS 9-11 BERM & SWALE, HEREBY HONORING
0
2 )2 32, 55
�0 ILOT THE APPROVED WET POND's DRAINAGE DNME LU
3S THE POST- DEVELOPMENT SUBAREA 4A HIGH >
POINT IS SET BY THESE INLETS.
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LOT
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LU <
J
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_44 (5
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LU Lu
LU <
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LOT OT <
GREENWAY,
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46
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LOT Post -Development Impervious Area Summary _j LLJ
LOT
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0 _j
L LOT
4V
LOT BLOCK-13-
LOT F
47 LU V)
83 (PER APPROVED SUBDIVISION
Subarea 4B �z 0
LOT PLAT SUB 20210 Existing Roadway 4,825 sf 0
Proposed Roadway &Sidewalks 20,975 sf
<
7 25,800 sf (D 0
82 Z,
Z C:) cl�
y WATERSHED SUMMARY FOR SUBAREA 4A
CID
L Area, 1-year Flow, 2-year Flow, 10-year Flow, 0
5 CN
ac. cfs cfs cfs
T;�
L
APP INLn 92 0.70 2.42 3.07 5.06
59
k�) Old
--WATERSHED SUMMARY FOR
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0
LOT Area, 1-year Flow, 2-year Flow, 10-year Flow, M U)
78 LOT ---- -- CN cfs cfs cfs JOB NO.
aC.
61
LOT _EDA 4B (Post-Dev.) 77 1.36 0.09 1.04 2.79 182150
77
/'111, / 62 GRA', C SCALE .--SUBAREA AND OUTFALL SUMMARIES SCALE
LOT I/
76 60 U 30 60 72 Post-Dev. Subarea Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66
"k 1 =60'
L 6 (Point of Interest) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection SHEET NO. —
4A �Section B.I.a (2-yr Peak Flow is Not Erosive) Section Brgya (Subarea < 1% of Overall Watershed) -�ection C.2.a (10-yr Peak Flow is Confined) Section C.3.c (Contributing DA < 1% of Overall DA) 9
LOT (IN FEET V / ct'
4B Section B.3.a (Energy Balance) rgy Balance Satisified) 3ection C.2.b (10-yr. Post Flow < Pre Flow) N/A (10-yr. Post Flow < Pre Flow Satisified)
7S LO
1 inch = 60 =N/A (oEne
z
0
z
z
0
0
0
X
0
0
0
0
0
0
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0
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0
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0
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0
0
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0
0
a
COLTM OF ALBEMARLE
Department of Community Development
Construction Record Drawings (As -built) for VSMP
The following is a list of infonnation required on construction record drawings for
storinwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the
construction record drawing be prepared ky someone other titan the designer. Please do not
provide design drawings as construction record drawings.
A. A signed and dated professional sea] of the preparing engineer or surveyor.
13. The name and address of the fim and individual preparing the drawings on the tide sheell.
C. The constructed location of all items associated with each facility, and the inspection records to verify
proper dimensions, materials and installation. The items include, but am not limited to the following:
1. Inspection Records and photographs for pipe trenches and bedding, including underdrains.
2. Video Pipe trispecition for any pipes which are not accessible or viewable.
3. Updated Location with geo-coordinates of all facilities.
4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities.
5. Current physical and topographic survey for all earthen structures. Ponds should include a survey
of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required
for alterations from the design.
6. Plants, location and type.
7. Plans and proriles for all culverts, Pipes, Risers. Weirs and Drainage Structures - Display the
installed type of drainage structures, culvert/pipc size, weirs. materials, inlets or end treatmerl
inlet and outlet protection, alignment and invert elevations compared to design.
8. Computations: For significant deviations from design. provide scaled computations verifying that
the as -built condition is equivalent or better than design.
9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical
sections and linings.
10. Easements - Show all platted casements with dead book references labeled Facilities and drainage
must be within platted easements. Provide copies of recorded documents.
11. Guardrail. fences or other safety provisions - Display the constructed location of all safety
provisions-, fences, guardrail, including the type. length and applied end treatments, compared to
design.
12. Material layers — biofilter media, stone layers, sand layers. keyways and cores must be verified as to
material types and depths. Include inspection reports. boring or test pit reports and materials
certifications. Biofilter media must be an approved state mix.
13. Access roads — show location of access roads, surface treatment. drainage, etc, as applicable.
14. Compaction reports am required to verify fill compaction in dams.
15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning.
General Construction notes for Stormwater Monaaement 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.
2. Pipe and riser joints are to be watertight within stormwater management facilities.
3. For temporary sediment traps or basins which are to be converted to permanent stormwater
management facilities; conversion is not to take place until the site is stabilized, and
permission has been obtained from the County erosion control inspector.
J
-=:7
'4—
-446
46-
474
4�
T LVI LO I X
32
29
L T -7
_7
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LOT
3
LOT
7F
APPROVED ESC LIMITS OF
DISTURBANCE COVERED
454 UNDER WPO 202000004, TYP.
LOT
33
LOT
LOT LOT
5 34 1
/SWM FOREST & OPEN S)AC�E
Sb I
/,�EASEMENT(UN
LOT DER SEPARATE�
5S
LOT r SET OF PLANS),' ------------------------
35
VRRM Water Quality Impervious Area Summary OT
36 z
(VRRM Limitsare defined bythe Expanded ESC Limits)
Existing Roadway 11,550 sf
x
Proposed Roadway & Sidewalks 30,800 sf
42,350 sf
Nib&
PROPOSED ESC LIMITS OF
DISTURBANCE EXPANSION
ASSOCIATED WITH THIS PLAN
�6 (AREA NOT PREVIOUSLY COVERJED�
UNDER A SEPARATE PERMT), 11
77
S
-S S
ESC LIMITS OF DISTURBANCE
EXPANSION/BOUNDARY IS USED TO DEFINE
THE VRRM WATER QUALITY BOUNDARY.
PROPOSED LEVEL SPREADER 4
RELEASES RUNOFF INTO A
VEGETATED FILTER STRIP WITH TYPE
B SOILS, TREATING SUBAREA 4B..
(AREA NOT PREVIOUSLY COVt:K/rLJ
LO >
5 1
LOT UNDER A - SEPARATE P�MIT), TYP
LOT T
LOT LOT LOT
9
-456 EA OF D \URBANCE
—458 AR IST
COVERED UNDER WPO %
202000004,TYP.
APPROVED ESC LIMITS 0
F
DISTURBANCE COVERED
154 UNDER WPO 202000004, TYP.
LIMITS OF DISTURBANCE
33
LOT ESC
EXPANSION/BOUNDARY IS USED TO DEFINE
THE VRRM WATER QUALITY BOUNDARY.
LOT
57 OREST &,. OPERSPACE
LOT 56 LOT �/Swm P
-//rASEMENT (UNDER SEPAKA[�
55
SETOF PLANS�
G APHIC SCALE
LOT 6 30 60 120
36
/71
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SCOTT/R. Cn�LLINSZ
Lic. No. 035791,�
8/22/22
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JOB NO.
182150
SCALE
1 11=60'
SHEET NO.
10
io'WIDETOF
ELEV.=41
PH
PROPOSED 8'WIDE VD(
RIPRAP LINED EME
SPILLWAY W/4:2 SIDE S
FILTER FABRIC UNDERL/
SPILLWAY CREST ELEV.
450 4SO
OF DAM-
6.od
MISTING
GRADE
OPOSED
'RADE
445
)T CL. Al -
8'
RGENCY
-OPES &
YMENT.
:444-50'.
440
440.
0�
6
0+000+2S
I DETENTION BASIN 4 SPILL
422.92- BEGINNING OF
42:
PROPOSED 13'LONG FLAT LEVEL SPREADER
HAVE A 12" DEEP PLUNGE POOL & A 6" WIDE RIGI
TO INCLUDE AVIDOT CL. Al RIPRAP LINING AND A
3'(MIN.) VDOT CL. Al RIPRAP LINED EMBAl
DOWNSTREAM FROM THE RIGID LIP EXTENDINC
FILTER STRIP. ALL RIPRAP TO INCLUDE FILTEF
UNDERLAYMENTS & BE A MIN. OF
PROPOSED 13'WX35L'VEGETATED FILTER STRIP. FILTER STR
UNIFORMLY GRADED TO THE SLOPES SHOWN TO ENSUR
FLOW BELOW THE LEVEL SPREADER. CONTRACTOR TO -
GRADES AT 6:1 & PREVENT SOIL COMPACTION BY HEAVY EQL
WITHIN THE LIMITS OF THE FILTER STRIP. SEE SHEE
ADDITIONAL FILTER STRIP DETAILS & DESIGN REQUIRI
STIR. A2, A VDOT STD. B-1 (CONCRETE MANHOLE BASE
WITH A 048") SHALL SERVE AS THE RISER's LOWER
SECTION & SHALL BE SET IN THE PROPOSED REINFORCED
CONCRETE FOUNDATION. A 048" STANDPIPE WITH A RIM
ELEVATION OF 443.50' SHALL COMPLETE THE STRUCTURE.
RISER TO INCLUDE (1) ONE PERMANENT 01.33"
LOW -FLOW ORIFICE WITH AN INVERT ELEV.�436.00 & (1)
ONE 010" MID -FLOW ORIFICE WITH AN INVERT
ELEVATION =441.15'. ALL ORIFICE OPENINGS SHALL HAVE
STATE APPROVED TRASHRACKS, TYPICAL. SEE THE
DETAILS IN THIS SET FOR ADDITIONAL INFORMATION.
io'� /I DE TOP OF DAN
:LEV.=446.00'
CONTRACTOF SHALL
44S INSTALL EMBA�KMENT
IN ACCORDAqCE w/
THE DESIGNS SHOWN
WITHIN THIS SET.
EXISTING-r�
440 1 GRADE I
435
432.00
LOWER STIR. A5 CONVEYING
TREATMENT VOLUME RUN ' OFFJ��
0
TO LEVEL SPREADER 4
1430 1
UPPER STIR. Ai CONVEYING
STORM EVENTS IN EXCESS OF
THE TREATMENT VOLUME
425
46o
45S
___�_PROPOSI
GRADE
450
445�
100-yr PEAK WSE-443.79
10-yr PEAK WSE=443.07
2-yr PEAK WSE-441.69
1-yr PEAK WSE=441.11
2m
� 435
PROPOSED BASIN's FLOOR
SHALL BE SLOPED TO DRAIN TO
THE RISER (o.5% MIN.) WITH
POSITIVE SLOPES THROUGHOUT.
-BASIN's FLOOR SHALL CONSIST OF
A 12" DEEP PEA GRAVEL LAYER
(TOP OF STONE ELEV.=436') AND A
FILTER FABRIC UNDERLAYMENTTO
REDUCETHE RISK OF CLOGGING.
425
TO PREVENT FLOTATION
THE RISER
BASE
PROPOSED VDOT
3HALL BE FIRMLY I
IMBEDDED 6" INTC
AN 18"
STD. EW-1
j�
-HICK REINFORCED
CONCRETE FOUNDATION
THAT IS 8'x8', AND
BURIED BELOW GROUND.
420.0 0'
420
420
PROPOSED VDOT STD. EC-1, CLASS Al RIPRAP LINED OUTLET
PROTECTION WITH FILTER FABRIC UNDERLAYMENT (L=19'±,
PROPOSED
W,=10', W,=19', D=18"). STONE TO BE INSTALLED FLAT &
STREAM
TO EXTEND TO THE CHANNEL's BANK. FILTER FABRIC SHALL
BE KEYED INTO THE EXISTING GROUND AT A MINIMUM OF 9"
AT THE END & ALONG THE PERIMETER. EDGES OF FABRIC
415
SHALL OVERLAP A MIN. OF 9".
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PROFILE SCALES
1"=5' (V)
1"=50' (H)
NOTE:
LEVELSPREADER 4ANDTHE FILTER STRIP
SHALL BE INSTALLED ATTHE TIME OFTHE
TEMPORARY ESC TRAP's CONVERSION TO
A PERMANENT SWIM FACILITY.
455
DETENTION BASIN 4 SECT16N]
455
450
450
DETENTION
BASIN 4
EXISTING-
445
GRADE
445
440
440
PROPOSED —
GRADE
STIR. A2, RISER
PROPOSED-
012" CL. 52
L
DIP W/L
435
435
I
LEVEL SP READER= STIR. A3 INV. OUT
UPPER STIR.
Ai
CONVEYING
STORM EVENTS
IN
EXCESS OF
75- BOTTOM OF LEVEL SPREADER
THE TREATMENT
VOLUME
,22-75- TOP OF LEVEL SPREADER
430
430
06
4. LS TO
)LIP
SLOPED
�STR. A4,
A,
JKMIENT
8" CLEANOUT
TOTHE
FABRIC
6" HDPE
S" DEEP.
425
__�\_\-16i-73
LF-
425
611 HDPE
IPTO BE -
@ 3-72%
E SHEET
-9-46 LF
LOWER
STIR. A5 CONVEYING
IE 13ACK
A3
@ 11-41%
TREATMENTVOLUME
RUNOFF
IPMENT
TO LEVELSPREACER
4
Fi2FOR
WENTS.
22.6
420
420
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Lu LL
0+00 0+50 1+00 1+50 2+00 2+50
1 LEVELSPREADER
DETENTION BASIN #4 DETAIL, SCALE V=30'
CONTRACTOR SHALL CALL THE COUNTY
INSPECTOR & ENGINEERING DEPARTMENT
24-HOURS BEFORE ANYANTICIPATED
CONSTRUCTION ACTIVITIES FOR THE DRY BASIN.
0
IMIT!�_ OF THE x/
BROCKHILL
)EVELOPME T
z
z z
PROPOSED VDOT STb. EC-1, CLASS AI RIPRAP- Z
LINED OUTLET PROTECTION WITH FILTER FABRIC X
UNDERLAYMENT (L=19'±, W1=10" W2=19.1 D�-'18-.)�l
STONE TO BE INSTALLED FLAT &TO EXTEND TQ
_�l THEtHANNEL's BANK. FILTER FABRIC SHALIABE
/KEYED INTO,THEEXISTING GROUND AT A MIN
,blF ;;V THE F �V
ND & ALONG THE PERIMETER. G
FA OVERLAP A MIN. Or 9
,PAIC�SHALL ly
x z
TO REVENT FLOTATION THE z
�%,E SHALL BET-IRMLY EMBEDD EXISTING SWM
6111 TO AN 18" THICK REINFORCED PROPOSED VARIABLE WIDTH 400i*
/> ��CACR�ETEFO NDATIONTHATIS_ SWIM MAINTENANCE ESMT. FACILITY TO
k8' AND BUR IEID BELOW GROUND.- 7L REMAIN
//8' _5� /__ - - - - l_..0
T T/
Z / / I
O�y
io'WIDE TOP OF
DAMELEV.=446.o ROPOSED BASIN'5 FLOOR SHALL BE
RISER (9.5% MINj�
SLOPED TO DRAIN TO THE
0 00 WITH POSITIVE SLOPES THROUGHOLT.�
PROPOSED 8'WIDEVDqTCL. Al
RIPRAP LINED EMERGENCY CONTRACTOR S.HALL RELOCATE THrS PORjTjON llhr�
HTLWAY wl 4-1 SIDE SLOPES & OF tHE-F_XZTNG FEN-CE,,AS SHOWN, t
R FABRIC UNDERLAYMENT ACCQMMODAT&HEROAD`s
P" TIE ZgDl
TE
SPILLWAY CREST ELEV,=/444 50'/,
A
�kSEE
THIS SHEET FOR SCALED
A..
PROFILES OF THE DRY BASIN, TYP.
POSED PUBLIC ROAD,
-16
EWALK AND GRASS
L EDACCESSTOSERVEAS
PROPOSED STIR. AS & THE
4CCESS TO THE DRY BASIN
DOWNSTREAM DRAINAUt
VEGETATED FILTER STRIP.
SYSTEM TO CONVEY THE
TREATMENT VOLUME FLOW TO
LEVEL SPREADER 4 & THE
VEGETATED FILTER STRIP FOR
. A . A
WATER QUALITY TREATMENT.
Ln
0+00-
42200
5'
0-10': MAX..
SLOPE= 2%
SLOPE
RANGE 422 10-
1-4% 22.
— 22.r _�LEVEL SPREADER�-
42 2- BE INWNG OF
__L 'SPREADER
421.75 -BOTTOM OF -EVEL
------- I - E�L SPREADER
2,22.75- TOP OF LEV
4
PROPOSED IYLONG FLAT LEVEL SPREADER 4. LS TO HAVE A 12" DEEP PLUNGE
PROPOSED CONSERVED POOL& A 6" WIDE RIGID LIP. LS TO INCLUDE AVDOT CL. Al RIPRAP LINING AND
-OPEN SPACE EASEMENT A SLOPED Y(MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT DOWNSTREAM
-FROM THE RIGID LIP EXTENDING TO THE FILTER STRIP. ALL RIPRAP TO
INCLUDE FILTER FABRIC UNDERLAYMENTS & BEA MIN. OF 6" DEEP.
PROPOSED 13'WX35L'VEGETATED FILTER STRIP. FILTER
STRIP TO BE UNIFORMLY GRADED TO THE SLOPES SHOWN
TO ENSURE SHEET FLOW BELOW THE LEVEL SPREADER.
CONTRACTOR TO TIE BACK GRADES AT 6a & PREVENT SOIL
COMPACTION BY HEAVY EQUIPMENT WITHIN THE LIMITS
OF THE FILTER STRIP. SEE THIS SHEET FOR ADDITIONAL
FILTER STRIP DETAILS & DESIGN REQUIREMENTS. -----
GRAPHIC SCALE
30 0 15 30 60
( IN FEET )
1 inch = 30 ft.
0
SCOTT/R. CMUNS7
Lic. No. 035791,�
8/22/22
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JOB NO.
182150
SCALE
AS SHOWN
SHEET NO.
11
DRY DETENTION BASIN CONSTRUCTION NOTES:
FACEL]TV PLANTING SPECIFICATIONS:
1. THE DETENTION BASIN SHALL HAVE TURF GROUND COVER, SUCH AS GRASS OR SOME OTHER FORM OF A VEGETATIVE GROUNDCOVER. LANDSCAPING
BEYOND THIS IS OPTIONAL AND IS NOT REQUIRED.
2. THE PROPOSED INTERIOR SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 2:1 TO REDUCE THE RISK OF EROSION. THE PROPOSED FLOOR SLOPES
SHALL BE GRADED TO PROVIDE POSITIVE DRAINAGE AT AULTIMES TO THE RISER STRUCTURE.
3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THE TOE OF THE EMBANKMENT NOR WITHIN 25 FEET OF THE
PRINCIPAL SPILLWAY STRUCTURE.
4. THE SOILS IN THE STORMWATER BUFFER AREA ARE OFTEN SEVERELY COMPACTED DURING THE CONSTRUCTION PROCESS, TO ENSURE STABILITY THE
DENSITY OFTHESE COMPACTED SOILS CAN BE SO GREATTHAT IT EFFECTIVELY PREVENTS ROOT PENETRATION AND, THEREFORE, MAY LEAD TO
PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB, PLANTING HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER
OF THE ROOTBALL FOR BAUL-AND-BURLAP STOCK, AND FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK.
5. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREES AND SHRUBS IS STRONGLY
RECOMMENDED AS A MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS.
1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS.
2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR ADDITIONAL INFORMATION.
THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE
SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS,
VIRGINIA NURSERYMEN'S ASSOCIATION, INCANDTHE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). ALL DISCREPANCIES SHALL BE BROUGHTTOTHE
ATTENTION OF COLLINS ENGINEERING PRIORTOTHE CORRESPONDING CONSTRUCTION ACTIVITY.
3. ALL PLANT MATERIAL SHALL MEETTHE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR
NURSERYSTOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005.
4. THE CONTRACTOR SHALLVERWYALL DIMENSIONS IN THE FIELIDAND NOTIFYTHE DESIGNER OFANYVARIANCE FROM THE PLAN.
5 ANY EXCAVATION).
THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY AT 1-800-552-7001 BEFORE
6. REFER TO THE APPROVED FINAL ROAD PLANS FOR ANY DETAILED SITE INFORMATION.
7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES.
8. PLANTSWILLBE PREPARED FOR SHIPMENT INA MANNER THAT WILL NOT CAUSE DAMAGETOTHE BARK, BUDS, BRANCHES,STEMS, OR OVERALL SHAPE OF
THE STOCK. CONTAINER GROWN PLANTS WILL BE TRANSPORTED IN THE CONTAINERS IN WHICH THEY HAVE GROWN.
9. ALL PLANT MATERIAL, UNLESS OTHERWISE SPECIFIED, SHALL BE UNIFORMLY BRANCHED AND HAVE A VIGOROUS ROOT SYSTEM. PLANT MATERIAL SHALL
BE HEALTHY, VIGOROUS, AND FREE FROM DEFECTS, DECAY, DISEASES, INSECT PEST EGGS, AND ALL FORMS OF INFESTATION. ALL PLANT MATERIAL SHALL
BE FRESH, FREE FROM TRANSPLANT SHOCK OR VISIBLE WILT. PLANTS DEEMED UNHEALTHY WILL BE REJECTED.
10. ALL CONTAINER STOCK SHALL HAVE BEEN PROPAGATED IN A CONTAINER LONG ENOUGH FOR THE ROOT SYSTEM TO HAVE DEVELOPED SUFFICIENTLY TO
HOUDITSSOIL. CONTAINER STOCK WITH POORLY DEVELOPED ROOT SYSTEMS WILL NOT BE ACCEPTED.
11. PLANTS NOT INSTALLED ON THE DAY OF ARRIVAL ON SITE SHALL BE STORED AND PROTECTED BY THE CONTAINER. OUTSIDE STORAGE AREAS WILL BE
SHADED AND PROTECTED FROM THE WIND AND SUN. PLANTS STORED ON SITE SHALL BE PROTECTED FROM ANY DRYING AT ALL TIMES BY COVERING THE
BALLS OR ROOTS WITH MOIST SAWDUST, WET BURLAP, WOOD CHIPS, SHREDDED BARK, PEAT MOSS, OR OTHER SIMILAR MULCHING MATERIAL.
12. THE OWNER RESERVES THE RIGHT TO SUBSTITUTE PLANT MATERIAL TYPE, SIZE AND/OR QUANTITY. ANY SUBSTITUTIONS MUST BE APPROVED BY THE
INSPECTOR INITIALLY, AND THEN THE DESIGNER.
13. MINOR FIELD ADJUSTMENTS MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: ROOTBALL AND UTILITY CONFLICT). MAJOR ADJUSTMENTS MUST BE
APPROVED BY THE DESIGNER.
14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN.
15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN THE ENTIRE ROOT BALL OR
ROOT MASS, WITHOUT CRAMPING ROOT STOCK.
16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS. THE PERIOD OF CARE AND
REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OF ALL PLANTS AND CONTINUE FOR ONE (1) CALENDAR
YEAR.
17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING ON A DAILY BASIS.
18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIALTHAT HAS BEEN DAMAGED BYVANDALISM, FIRE, OR OTHERACTIVITIES BEYONDTHE
CONTRACTOR'S CONTROL.
FACILITY CONSTRUCTION
1. DETENTION BASINS MAY SERVE AS SEDIMENT BASINS AND/011 TRAPS DURING PROJECT CONSTRUCTION. IF THIS IS DONE, THE VOLUME SHALL BE BASED
ON THE MORE STRINGENT SIZING RULE (EROSION AND SEDIMENT CONTROL REQUIREMENTS VS. STORMWATER TREATMENT REQUIREMENTS).
INSTALLATION OF THE PERMANENT RISER SHALL BE INITIATED DURING THE CONSTRUCTION PHASE,ANDDESIGN ELEVATIONS SHALL BESET WITH FINAL
CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION FACILITYIN MIND. APPROPRIATE PROCEDURES SHALL BE
IMPLEMENTED TO PREVENT DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED TO AN DETENTION BASIN.
2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE FACILITY 15 COMPLETELY STABILIZED. IF THE
PROPOSED BASIN's SITE WILL BE USED AS A SEDIMENT TRAP OR BASIN DURING THE CONSTRUCTION PHASE, THEN THE FACILITY WILL BE DEWATERED,
DREDGED AND RE -GRADED TO DESIGN DIMENSIONS AFTER THE ORIGINAL SITE CONSTRUCTION IS COMPLETE. MODIFICATIONS SHALL BE MADE TO THE
RISER, ORIFICES AND BARRELS AS REQUIRED SO THAT THEY ARE CONSISTENT WITH THE FINAL CONSTRUCTION SPECIFICATIONS.
3. THE CONTRACTOR SHALL ASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT
STAGING AREAS WHEN POSSIBLE.
4. THE CONTRACTOR SHALL CLEAR AND STRIP THE PROJECT AREA IF REQUIRED TO THE DESIRED SUB -GRADE.
5. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND STORMWATER DIVERSION
PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS,
NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL STABILIZATION.
6. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTAULTHE SPILLWAY PIPE DURING THE ESC PHASE.
7. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/011 THE BARREL(s) WITH PERMANENT COLLARS DURING THE ESC PHASE.
CONTRACTORSHALL ENSURETHETOP INVERT OF THE OVERFLOW WEIR ISCONSTRUCTED LIEVELATTHE DESIGN ELEVATION.
8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNALBERMS IN 8-TO 12-INCH LIFTS, COMPACTION SHALL BE COMPLETED IN LIFTS
WITH APPROPRIATE EQUIPMENT.THE CONTRACTOR SHALL ALSO ADHERE TO THE CLAY LINER SPECIFICATIONS OUTLINED INTABLE 14.4BELOW:
Table 14.4. Clay Liner Specifications
Promrity
Test Method
Unit
specdkasm
Permeability
ASTM D-2434
Cirisec
1 X le
Plasticity Index of Clay
ASTM D-4231424
%
Not less than 15
Liquid Limit of Clay
ASTM D-2216
%
Not less than 30
Clay Particles Passing
ASTM D422
%
Not less than 30
Clay Corn-dinn
%
95% of standard proctor densft
Virginia Stoffnwater Managment Handbook (1999)
9. UPON COMPLETION OF THE EMBANKMENT GRADING, THE CONTRACTOR SHALL EXCAVATE/GRADE UNTIL THE APPROPRIATE ELEVATION AND DESIRED
CONTOURS ARE ACHIEVED FOR THE BOTTOM AND SIDE SLOPES OF THE BASIN.
10. CONTRACTOR SHALL THEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS.
11. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON PROTECTION IF
APPLICABLE.
12. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW.
13. THE CONTRACTOR SHALL THEN INSTALL THE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE WITH THE APPROVED PLANS, IF APPLICABLE.
FACILITY MAINTENANCE:
MAINTENANCE OF THE DETENTION BASIN IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE FACILITIES.
DURING THESE INSPECTIONS THE FOLLOWING TASKS SHALL BE PERFORMED BY TH E CONTRACTOR IN TH E Fl RST YEAR FOLLOWING INSTALLATION, AND TH E
OWNER THEREAFTER:
I- MEASURE SEDIMENT ACCUMULATION LEVELS IN THE BASIN.
2. MONITOR THE GROWTH OF THE GROUNDCOVER AND ANY TREES AND SHRUBS PLANTED, AS APPLICABLE. RECORD THE SPECIES AND THEIR APPROXIMATE
COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES, AS APPLICABLE.
3. INSPECT THE CONDITION OF STORMWATER INLETS TO THE BASIN FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING.
4. INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH,
OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY.
5. INSPECT BASIN OUTFALL CHANNEL & SPILLWAY FOR EROSION, UNDERCUTTING, RIP -RAP DISPLACEMENT, WOODY GROWTH, etc.
6. INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOI NT FAILURE, LEAKAGE, CORROSION OR OTHER FAILURES.
7. INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS AS APPLICABLE FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS
ACCUMULATION OR OTHER FAILURES.
8. INSPECT MAINTENANCE ACCESS TO ENSURE IT 15 FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE
OPENED AND OPERATED.
9. INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE BASIN FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING.
10. OWNER OR CONTRACTOR SHALL MAKE NEEDED REPAIRS IMMEDIATELY.
FACILITY INSPECTION:
MULTIPLE INSPECTIONS ARE CRITICAL TO ENSURE THE BASIN(s) ARE PROPERLY CONSTRUCTED. BECAUSE THE TIMING OF THE INSTALLATION IS DICTATED BY
THE CONTRACTOR, THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING THE ENGINEER AND INSPECTOR PRIOR TO INSTALLATION. MULTIPLE SITE
VISITS AND INSPECTIONS ARE REQUIRED TO BE SCHEDULED BY THE CONTRACTOR WITH THE ENGINEER AND INSPECTOR DURING THE FOLLOWING STAGES OF
THE DETENTION BASIN's CONSTRUCTION PROCESS:
1. PRE -CONSTRUCTION MEETING
2. INITIAL SITE PREPARATION (INCLUDING INSTALLATION OF PROJECT E&S CONTROLS)
3. EXCAVATION/GRADING (e.g., INTERIM/FINAL ELEVATIONS)
4. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(s).
4. DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS)
5. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING IF APPLICABLE)
6. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE)
GENERAL SWIM NOTES:
2. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE
OPENINGS. SEE THIS SHEET, OR EQUIVALENT, FOR DETAILS.
2. CONCRETE FOUNDATIONS SHALL BE INSTALLED ON ALL RISER STRUCTURES
MEETING MINIMUM VESCH 3 14 SPECIFICATIONS.
3. CONTRACTOR SHALL HIRE A THIRD PARTY GEOTECHNICAL ENGINEER TO
ENSURE THE EMBANKMENT IS STRUCTURALLY SOUND. ALL FILL MATERIAL
AN D PROPOSED CONSTRUCTION SHALL BE APPROVED BY AN ONSITE
GEOTECHNICAL ENGINEER PRESENT DURING THE CONSTRUCTION OF THE
EMBANKMENT AND FILL AREAS, AND PRESENT DURING THE CORE
SAMPLING.
4. THE DOWNSTREAM EMBANKMENTSIDE SLOPES OFALL PERMANENT
FACILITIES SHALL HAVE AMAXIMUM TISLOPE.
CONTRACTOR SHALL EXCAVATE SEDIMENT LADEN MATERIAL IN THE ESC
SEDIMENTTRAPS & BASINS, IFAPPLICABLE, ATTHE TIME OFTHE FACILITIES -
CONVERSIONS TO PERMANENT SWIM FACILITIES. AT SUCH TIME THE
CONTRACTOR SHALL REGRADE THE SEDI MENT TRAPS AN D/OR BASI INS TO
THE PROPOSED GRADES SHOWN ON THE SWM SHEETS. THE CONTRACTOR
SHALL MINIMIZE SOIL COMPACTION DURING THE CONVERSIONS.
VEGETATED FILTER STRIP & LEVEL SPREADER REQUIREMENTS
MAINTENANCE INSPECTIONS:
ANNUAL INSPECTIONS SHALL BE CONDUCTED IN THE NON -GROWING SEASON DURING THE FALLAND WINTER MONTHS. INSPECTIONS SHALL TRIGGER
MAINTENANCE OPERATIONS, AS REQUIRED. MAINTENANCE OPERATIONS MAY INCLUDE, BUT IS NOT LIMITED TO, SEDIMENT REMOVAL, PERIODIC MOWING,
REPAIR OFTHE LEVEL SPREADER AND ENSURING A DENSE, HEALTHY VEGETATED GROUNDCOVER. MOWING SHALL BE COMPLETED AT LEASTTWICE A YEAR
TO PREVENT FURTHER WOODY GROWTH. SPOT RE -VEGETATION OFTHE FILTER STRIP IS REQUIRED IN ORDER TO MAINTAIN A go% MINIMUM COVERAGE RATE.
THE CONTRACTOR SHALL CONDUCTTHE INSPECTIONS FOLLOWING THE FIRSTYEAR THE PROJECT IS COMPLETED, AND THE OWNER SHALL CONDUCTTHE
INSPECTIONS THEREAFTER.
INSPECTIONS SHALL INCLUDETHE FOLLOWING ATA MINIMUM:
i. ENSURE FLOW PATHS ARE NOT SHORT-CIRCUITED IN THE LEVEL SPREADER AND THROUGH THE VEGETATED FILTER STRIP.
2. ENSURE DEBRIS AND SEDIMENT HAS NOT ACCUMULATED.
3 CHECK FOR SCOUR AND EROSION WITHIN THE LEVEL SPREADER SYSTEM AND FILTER STRIP.
4 CHECK FOR FOOT OR VEHICULAR TRAFFIC DAMAGE IN THE STONE.
5. ENSURE VEGETATIVE DENSITY MEETS OR EXCEEDS go% OF THE FILTER STRIP AREA.
IN THE EVENT MAINTENANCE IS REQUIRED DURING THE ABOVE NOTED INSPECTIONS, CORRECTIVE MEASURES SHALL BE COMPLETED IMMEDIATELY.
Vegetated Filter Strips Planting Requirements
Vegetated Filter Strips shall be planted at such a density to achieve a 90% grass/herbaceous
cover after the second growing season. Vegetated Filter Strips shall be seeded, not sodded.
Seeding establishes deeper roots, and sod may have muck soil that is not conducive to infiltration
(Wisconsin DNR, 2007). The filter strip vegetation shall consist of turf grasses, meadow grasses,
other herbaceous plants, shrubs, and trees, as long as the primary goal of at least 90% coverage
with grasses and/or other herbaceous plants is achieved. Vegetation at the toe of the filter, where
temporary ponding may occur behind the permeable berm, shall be able to withstand both wet
and dry periods. The planting areas can be divided into zones to account for differences in
inundation and slope. Additionally, the trees selected to be planted shall be 10' on -center and
shall be an even mix of River Birch (Betula Nigra), Red Maple (Acer Rubrum) and Sweetgum
(Liquidambar Styraciflua).
Table 2.4. Vegetated Filter Strip Materials Specifications
Material
Specification
Ouantity
Pea Gravel (#8 or ASTM equivalent) or
Diaphragm should be 2 feet wide, 1
Gravel
where steep (6% +) use dean bank -run
foot deep, and at least 2 inches
Diaphragm
VDOT #57 or ASTM equivalent (1-inch
below the edge of pavement.
maximum).
Permeable
40% excavated soil, 40% sand, and 20% pea gravel to serve as the media for the
Berm
berm.
Filter Fabric
Geotextile material appropriately selected for placement under rip rap or gravel to
effectively separate the stone from the ground below
Fngineered
Level Spreader lip should be concrete, metal, Umber, or other rigid material,-
Level
Reinforced channel on upstream of lip: VDOT EC-3-
Spreader
See Hathaway and Hunt (2006) or Henrico County Program Manual for alternate
designs -
Erosion
Control
Where flow velocities dictate, use woven biodegradable erosion control fabric or
Fabric or
mats that are durable enough to last at least 2 growing seasons- (e-g.. VDOT
Matting
Erosion Control matting EC-3).
If existing topsoil is inadequate to support dense turf growth. imported top soil
(loamy sand or sandy loam teyture), wIth less than 5% clay content, corrected pH
Topsoil
at 6 to 7, a soluble salt content not exceeding 500 ppm, and an organic matter
content of at least 2% S.hA be used- Topsoil "� be uniformly distributed and
ww_
lightly compacted to a minimum depth of 6 to 8 inches
Compost be derived from plant material and provided by a member of the
, _
Compost
U.S. Comp os ting Seal of Testing Assurance (STA) program, as outlined in
Stormwater Design Specification No- 4-
VAUG"faSTORMWATER DESIGN SPECIFICATION NO. 2 SHEET FLOW TO FILTER OR OPEN SPACE
KEY LEVEL. SPREADER
INTO EXISTING GRADE
Z
RIPRAP PLUNGE POOL A
1�1,
RIPRIAP APRON
er X W TREATED
if
viij�_ TIM13ERS OR
CONCRETE I IP
LENGTH OF LEVEL SPREADER
LIP TO 13E BASED ON DESIGN FLOW
At
__
, 1 - AND ALLOWABLE VELOCITY
k TOP OF LEVEL SPREADER
SHALL BE FLAT
1-3 IN. COURSE AGGREGATE
OR OTHER LINING AS
DESIGNED FOR STABILITY
PLAN VIEW
DIMENSION BASED ON
5%C2D-.l)0RLE=S �VMETATM
DESIGN DIISCHARGE FILTER STIFF OR CON� -
O%N �ACZ PlAsi 10 FEET LES&
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AIN
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iL 1
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L
-I mI t� I IJIL_- i I ]I
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_11
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Figure 2.4: Level Spreader. P47eor Channel Flon, to Filter Strip orPolosomwd-Conserre
Open Space
LEVEL SPREADER NOTES.
1. FIRSr 10' FROM LEVEL SPREADER LIP MUST BE 2% OR LESS.
2. TIE BACK ENDS OF LEVEL SPREADER INTO THE SLOPE TO AVOID SCOURING.
3 CONTRACTOR SHALL NOTIFY COLLINS ENGINEERING & COUNTY ENGINEERING A MINIMUM OF � WEEK PRIOR TO
THE CONSTRUCTION OF THE LEVEL SPREADER. COLLINS ENGINEERING's PRESENCE 15 REQUIRED AT THE TIME OF
THE LEVEL SPREADER'S CONSTRUCTION 50 THAT THE LEVEL SPREADER's FINAL LOCATION CAN BE FIELD VERIFIED.
FI NAL LOCATION MAY VARY SLIGHTLY FROM THE APPROVED PLAN IN ORDER TO PRESERVE A LARGE TREEIS).
4 CONTRACTOR SHALL USE A GEOTE)CrILE FI LTER FABRIC UNDERLAYMENT BELOW THE PROPOSED LEVEL SPREADER
STONE. THE GEOTE)(TILE FILTER FABRIC SHALL BE TENSAR TX-5 TRIANGULAR GRID, OR EQUIVALENT.
DID.4 U. 11.1e.
r)c
PIP. 1 4' RDPE p..Iv (.ptio,htl)
HrIPF structnral ptantin with
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SECTION .1-9: TYPICAL GF-A.PIIIC.AL DETALILS
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L - - - - - - - - - - -
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rill
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FOUNDATION DRAIN BLANKET DRAIN
d�.
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CHIMNEY DRAIN TOE DRAIN
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EMBANKMENT NOTES:
THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE
WITH THE DETAILS SHOWN IN THIS PLAN. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING &
RIPRAP AND THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL
MATERIAL SHALL CONSIST OF ML, CIL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON
COMPACTING SOIL. COMPACTED FILL SHAUL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A
MINIMUM OF 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM MOISTURE CONTENT. ALL FILL MATERIAL
AND CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL ENGINEER PRESENT DURING THE
CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS.
StormRaXTM
ROUND SERIES TRASH RACK (OREQUIVALENT)
CONCRETE MANHOLE
STANDARD 60 INCH RACK SHOWN
DIMENSIONS IN INCHES
PLAN
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hirt Na.
DIMA
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Plastic Solutions, Inc. o"TOME"
PO Box 43M. Whches�. VA 22604
Z38 McGinee Rd. Wriheate,, VA 7Z60
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CONCRETE STRUCTURE DIMENSIONS
INSIDE STRUCTURE DIMENSION
OUTSIDE STRUCTURE DIMENSION
AVAILABLE 011"TIOUS
CROSS SFUIICING FOR OVERHANG
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Stormwater Quality Summary
Table
Phosphorus Removal SurplusAmount
AmountofOffsite
Percent of Total
Phosphorus Removal
Surplus Amount
Amount of Offsite
Percent of Total
Section
Block Common Name
SWM Facility ID
Type of Facility
achieved w/proposed plan Plan # of OffsIte Credits
Credits Purchased
Development
Required Phosphorous
Section
Block Common Name
SWM Facility ID
Type of Facility
achieved w/proposed plan
Plan #
of Offsite Credits
Credits Purchased
Development
Required Phosphorous
(lb/yr) Created (lb/yr)
(lb/yr)
Offsite Credits I%)
Removal Rate (lbs/yr)
70,
(lb/yr)
Created (lb/yr)
(lb/yr)
Offsite Credits
Removal Rate (lbs/yr)
5
16 Single Family Housing
Level Spreader'A'
Sheetflow to Conservation Area with A/B soils
6.89 WPO 20210007
0
0.0%
SCOTT
0
R.
LINS
1
4A Apartments
Pond 11
Wet Pond
4.01
WP0201800051
5
17 Single Family Housing
UGD'B'
Underground Detention (No Water Quality)
WPO 20210007
6.02
17.7%
17.72
U Lic.
No.
035791,'z�
1
4A Apartments
DP-4A
Detention Pond w/ Underground Storage
-
WP0201800051
llc�
8/22/22
1
4A Apartments
CDS-4A
CDS Unit (Manufactured Device)
1.60
WP0201800051
5
18 Single Family Housing
TED
TBD
TBD TBD
TBD
TBD
TBD
z
1
4A Apartments
LS-11
Sheet f low to open space REMOVED
-
WP0201800051
0
1.27
5.8%
14.17
Section 5 Master Plan Comparison
IONAL
t
Of
1
4B Apartments
Pond 11
Wet Pond
0.18
WP0201800051
Phosphorus Removal Anticipated Amount of
Anticipated Percent of
Amount of Offsite
Percent of Total
Total Required
z
1
4B Apartments
LID-413
Isolator Row (Manufactured Device)
3.38
WP0201800051
Section
SWM Facility ID
Phosphorus Removal proposed
achieved w/proposed plan Offsite Credits
Total Development Offs1te
Credits Purchased
Development
Phosphorous Removal
10
1 4B Apartments Pond 4B Extended Detention Pond 0.79 WP0201800051 w/master plan (lb/yr) (lb/yr) Purchased (lb/yr) Credits (%) (lb/yr) Offsite Credits [%) Rate (lbs/yr)to Date
z
1
4B Apartments
LS-413
Sheet f low to open space
0.74
WP0201800051
5
Pond 14A Treatment Total
4.81
TBD
87.98
1
ROW
Pond 11
Wet Pond
0.18
WP0201800013
5
Pond 14B Treatment Total
6.42
TBD
0
1
ROW
LS-11
Sheet f low to open space REMOVED
-
WP0201800013
0
1.09
5.0%
1.12
5
Pond 15A Treatment Total
5.16
TBD
Total ONSITE Phosph rous
1
ROW
LS-11
Sheet f low to open space REMOVED
-
WP0201800013
5
Pond 15B Treatment Total
5.14
TBD
Removal Rate Provided
0
1
8B ROW and Block 8B
Pond 10
Wet Pond
5.91
WP0201800080
5
Pond 16 Treatment Total
11.75
TBD
(lbs/yr) to Date
I
ROW
LS-10
LS-10 REMOVED
-
WPO201800080
0.68
1.53
7.0%
6.74
5
Grass Channel Treatment Total
2.1
TBD
66.01
0
1
- ROW
LS-10
LS-10 REMOVED
-
WP0201800080
5
Sheet Flow to Open Space Treatment Total
1.43
6.89
0
1
3 Village Center and
Pond4
Wet Pond wth Downstream
23.62
WP0201700037
0
0
0.0%
5
Blocks 16-17 Wet Pond
-
0
1
3 Salamander Street
LS-4.1
Sheet flow to open space
(Amendment #4)
Phosphorous Removal
Section 5 Treatment Total
36.81
6.89
Rate Credits (lbs/yr)
1
3 Village Center
LS'B'
Sheet f low to vegetated filter strip
7.17
WP0201700037
0
8.96
40.8%
30.68
Section 5 Nutrient Credits Total 6.8
20.0% 1 1 1
6.02
17.7%
Purchased (or Proposed to
(Amendment #4)
1
3 Salamander Street
Pond 11
Wet Pond
0.38
WP0201800050
be Purchased) to Date
0
1
3 Salamander Street
LS-11
Sheet flow to open space REMOVED
-
1
WP0201800050
1
0.08
0
0.0%
Overall Treatment Totall
141.28
1 66.01 1
21.97
k:
r
1
8A Senior Living Facility
Pond 11
Wet Pond
3.70
WP0201900004
I
Overall Nutrient Credits Purchasedi 34
100.0%
21.97
64.6%
V)
U
1
8A Senior Living Facility
LS-11
Sheet flow to open space REMOVED
WP0201900004
0.01
0
0.0%
5.68
z
ur)
W
co
n
-E
Section I Master Plan Comparison
Anticipated Treatment Total With SWM Master Plani
175.56
Phosphorous Removal
0
(n
Rate Percent Provided
0
Z
0
0
Phosphorus Removal Anticipated Amount of
Anticipated Percent of
Amount of Offsite
Percent of Total
Notes:
Onsite to Date
U)
F-
Section
SWM Facility ID
Phosphorus Removal proposed
achieved w/proposed plan Offsite Credits
Total Development Offsite
Credits Purchased
Development
1. To date, the total required phosphorous removal rate is 87.98 lbs/yrand
the total phosphorous removal rate achieved through onsite SWIM facilities is 66.01 lbs/yr. This leaves a deficit of 21.97 lbs/yr (87.98-66.01) that is mitigated
through nutrient credit purchases. in
>
z
w/master plan (lb/yr)
75.0
W
(lb/yr) Purchased (lb/yr)
Credits [%)
(lb/yr)
Offsite Credits (%)
accordance
with stormwater regulations, the overall Brookhill Development
is allowedto use offsite
BMPs (e.g. nutrient credit purchases) totalling a maximum of 25%
ofthe overall required required phosphorous removal rate.
1
Pond 4TreatmentTotal
6.77
23.62
2. Actual purchased
nutrient credits assoicated withthe approved plansto date is 12.01 lb/yr.
1
Pond 7TreatmentTotal
8.11
TBD
3. Nutrient credits
proposed to be purchased with VSMP 201700037 Amendment#4
is 8.96 lbs/yrand
with thisVSMP plan is 1.00 lbs/yr.
>
.0
1
Pond 10 Treatment Total
6.94
6.59
ui
1
Pond 11 Treatment Total
9.68
8.54
1
Pond 4B Treatment Total
-
0.79
0
1
Manufactured Devices Treatment Total
2.62
4.98
0
1
Infiltration Treatment Total
21.71
0
1
Level Spreader 'B'
-
7.17
STORMWATER QUALITY SUMMARY NOTE
1
Level Spreader 4B
9.74
0 4
T2143
AS SUMMARIZED ABOVE IN NOTES #1-3, THE TOTAL PHOSPHOROUS
REMOVAL RATE REQUIRED TO DATE IS 87.98 Ibs/yr FOR THE
Section 1 BMP TreatmentTotal
65.57
Section 1 Offsite Nutrient Credits Totall 6.8
20.0% 1
1 1
12.8.5 1
38%
OVERALL BROOKHILL
DEVELOPMENT.
ADDITIONALLY, THE TOTAL PHOSPHOROUS REMOVAL RATE PROVIDED
ONSITE
IS 66.01 Ibs/yr
FOR THE OVERALL BROOKHILL
DEVELOPMENT. A MINIMUM OF
75% OF THE REQUIRED PHOSPHOROUS
REMOVAL
RATE PROVIDED
.0
Phosphorus Removal
Surplus Amount
Amount of Offsite
Percent of Total
Cq
I
Section
Block Common Name
SWM Facility ID
Type of Facility
achieved w/proposed plan
Plan #
of Offsite Credits
Credits Purchased
Development
Required Phosphorous
ONSITE HAS BEEN
MET FOR THE BROOKHILL DEVELOPMENT.
LU
r-4
(lb/yr)
Created (lb/yr)
(lb/yr)
Offsite Credits
Removal Rate (lbs/yr)
r1l
2
9 Townhouses
Elk 9 Wet Pond
Level 11 Wet Pond
5.87
WP0201800086
0
0
2
10 Townhouses
Blk 10- LIGD
Underground Detention (No Water Quality)
-
WP0201800086
0
2.10
6.2%
10.05
0
2
11 Townhouses
-
-
WP0201800086
2
N/A Archer Avenue Extension
Level Spreader 4
Level Spreader to Vegetated Filter Strip
0.82
TBID
1 0
1 1.00 1
2.9%
1.82
Section 2 Master
Plan Comparison
Phosphorus Removal Anticipated Amount of
Anticipated Percent of
I
Amount of Offsite
Percent of Total
0
E
Section
SWIVI Facility ID
Phosphorus Removal proposed
achieved w/proposed plan OffsIte Cred its
Total Development Offsite
Credits Purchased
Development
w/master plan (lb/yr)
(lb/yr) Purchased b/yr)
Credits (%)
(lb/yr)
Offsite Credits (%)
2
Pond 12 Treatment Total
8.06
0')
2
Sheet Flow to Open Space Treatment Total
1.67
-
2
Blk 9 Wet Pond
5.87
2
Blk 10- UGD
<
L:
I
2
Gredit fFnFn I.A.1120201.700027-I[Removed w/ Amend. #4) i
-
- I
i -
C11)
0')
-j
0
2
Level Spreader 4
0.82
C�
0
Section 2 Treatment Totall
9.73
1 6.69
co
Section 2 Nutrient Credits Total 6.8
20.0%
3.10
9.1%
<
Phosphorus Removal
Surplus Amount
Amount of Offsite
Percent of Total
U)
Section
Block Common Name
SWIM Facility ID
Type of Facility
achieved w/proposed plan
Plan
of Offsite Credits
Credits Purchased
Development
Required Phosphorous
(lb/yr)
Created (lb/yr)
(lb/yr)
Offsite Credits I%)
Removal Rate (lbs/yr)
C--)
>
3
13 TBD
TBD
TBID
TED
TBID
TBD
TED
TBD
M
3
13 TBD
TBD
TBD
TBD
TBID
TED
TBD
TBD
TBD
J)
3
12 TBD
TBD
TBD
TED
TBID
TBD
TBD
TED
0
<
Section 3 Master
Plan Comparison
>
11-�
Phosphorus Removal Anticipated Amount of
Percent of
Amount of Off he
Percent of Total
U)
0
Section
SWM Facility ID
Phosphorus Removal pro posed
achieved w/proposed plan Offsite C
7Anticipated
Total
Total Development Offsite
Credits Purcha:ed
Development
Ld
<
w/master plan (lb/yr)
(lb/yr) Purchased
Credits I%)
(lb /yr)
Offsite Credits
Uj
3
Pond 13ATreatment Total
9.13
TBD
>
3
Sheet Flow to Open Space Treatment Total
-71
5.95
TBD
U)
Section 3 Treatment Tota
15.08
TBD
U-1
10�
c,
Section 3 Nutrient Credits Totall 6.8
20.0%
TBD I
TBD
Uj
Phosphorus Removal
Surplus Amount
Amount of Offsite
Percent of Total
L9
0
Uj
<
0
Section
Block Common Name
SWM Facility ID
Type of Facility
achieved w/proposed plan
Plan #
of Offsite Credits
Credits Purchased
Development
Required Phosphorous
-1
0
(lb/yr)
Created (lb/yr)
(lb/yr)
Offsite Credits I%)
Removal Rate (lbs/yr)
4
14 TBD
TBD
TBID
TED
TBD
TBD
TBD
TBD
<
4
14 TBD
TBD
TBID
TBD
TBD
TBD
TBD
TBD
LU
4
14 TBD
TED
TBD
TBD
TBD
TED
TBD
TED
TBD
>
U
-6
0
<
Section 4 Master
Plan Comparison
Phosphorus Removal
Phosphorus Removal Anticipated Amount o
Anticipated Percent of
Amount of Offsite
Percent of Total
-j
t ion
SWM Facility ID
proposed
achieved w/proposed plan Offsite Credits
Total Development Offsite
Credits Purchased
Development
LU
0
w/master plan (lb/yr)
Purchased
Credits
b/yr)
Offsite Credits
(lb/yr) (lb/yr)
[%)
44
Pond 13A Treatment Total
14.05
TBD
4
Sheet Flow to Open Space Treatment Total
0.04
TBD
U
Section 4 Treatment Total
14.09
TBD
0
Section 4 Nutrient Credits Total 6.8
20.0%
TBD
0
U
z
LU
<
(if
LU
CD
U)
_j
_j
<
-j
0
LU
LU
>
0
0
0
<
0
C:)
C:)
IN
F-
U
LU
E
0
JOB NO.
182150
ou
SCALE
NONE
SHEET NO.
13