HomeMy WebLinkAboutWPO202200040 Plan - VSMP 2023-03-10N3,`lf- ao".1 ji,�AI/Y*A
OWNERS:
TMP 046Eo-og-oo-000Ao
STANLEY MARTIN HOMES, LLC
=7io PLAZA AMERICA DRIVE
RESTON, VA 20190
TMP 046Eo-io-oo-000Eo
STANLEY MARTIN HOMES, LLC
11710 PLAZA AMERICA DRIVE
RESTON, VA 2o290
TMP 046135-oo-oo-ooiCo
COUNTY OF ALBEMARLE C/O FINANCE ADMINISTRATION
402 MCINTIRE ROAD
CHARLOTTESVILLE, VA 22902
DEVELOPER:
RIVERBEND DEVELOPMENT, INC.
455 SECOND STREET SE, SUITE zol
CHARLOTTESVILLE, VA 22902
ENGINEER:
COLLINS ENGINEERING
zoo GARRETT ST, SUITE K
CHARLOTTESVILLE, VA 22902
TAX MAP:
TMP 046Eo-og-oo-000Ao
INSTRUMENT #202200004923
8.22 ACRES (PORTION OF)
TMP 046Eo-io-oo-000Eo
INSTRUMENT#202200004923
o.7z ACRES
TMP 046135-oo-oo-ooiCo
D.B.1973, PG. 437
4.75 ACRES
TOTAL PROJECT AREA:
8.04 ACRES
ZONING:
NEIGHBORHOOD MODEL DEVELOPMENT DISTRICT
(ZMA202800011 WITH PROFFERS -APPROVED BY THE
BOARD OF SUPERVISORS ON JULY 17, z019)
THE CODE OF DEVELOPMENT AND AND APPLICATION
PLAN FROM ZMA201500007ARE 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 CONNECT TO
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 2o3.5. BOUNDARY INFORMATION WAS
COMPILED BY LINCOLN SURVEYING ON MARCH 7,
2oi5. FIELD VERIFIED BY COLLINS ENGINEERING IN
MARCH OF 2023.
DATUM:
NAVD1988
EXISTING VEGETATION:
MOSTLY WOODED
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, zoo5. 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
(WPO 202200040)
RIVANNA MAGISTERIAL DISTRICT
ALBEMARLE COUNTY, VIRGINIA
-
~
_
IN
SHEET LAYOUT
SCALE: 1" = 80'
____
EXISTING
U.S. ROUTE 29 -- -
- ——SEMINOLETRAIL— —�-- -- — —
s\
n / s
/ GRAPHIC SCALE
80 a 40 80 160
i
( IN FEET )
1 inch = 80 ft.
U It: PKUNUStU /l" LULVtKI bMUWIV W1 I MIN I MIb PLAN
ET BENEATH THE ARCHER AVENUE EXTENSION CANNOT BE
VSTALLED U TIL VDOT HAS APPROVED SUB 2022001420
ITE
PpLO GR pUN�
VICINITY MAP
SCALE: 1" = 2000'
Sheet List Table
Sheet Number
Sheet Title
1
COVER
z
EXISTING CONDITIONS
3
EROSION & SEDIMENT CONTROL NOTES, NARRATIVE & DETAILS
4
EROSION & SEDIMENT CONTROL PHASE I PLAN
5
EROSION & SEDIMENT CONTROL PHASE II 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
to
STORMWATER QUALITY PLAN
11
STORMWATER MANAGEMENT NOTES & DETAILS
12
STORMWATER MANAGEMENT NOTES & DETAILS
13
OVERALL BROOKHILL STORMWATER QUALITY SUMMARY
14
BUFFER PLAN
14 TOTAL SHEETS
LEGEND:
EROSION CONTROL * HANDB/OOK SPECIFICA 77ON NUMBER CONTROL
ICE Xis, CONSTRUC7ON ENTRANCE 3.02
CR CR CONSTRUCTION ROAD 3.03
STABILIZA 77 ON
SF SILT FENCE 3.05
ST O SEDIMENT TRAP 3.13
OP OUTLET PROTECTION 3.18
RRKam RIPRAP 3.19
CD ' CHECK DAM 3.20
IS IS TEMPORARY SEEDING 3.31
PS PS PERMANENT SEEDING 3.32
OTREE PROTECTION 3.38
DC --&—
DC DUST CONTROL 3.39
SITE PLAN
EDGE OF PAVEMENT
CURB
PROPOSED ASPHALT PAVEMENT
— GREEN WAY BUFFER
PROPOSED EASEMENT
DROP INLET
DRAINAGE PIPE
— — — —200— — — — EXIS77NG CONTOUR
zoo PROPOSED CONTOUR
PRESERVED STEEP SLOPES
MANAGED STEEP SLOPES
PROPOSED CONCRETE
PROPOSED STREAM IMPACTS
OO 0 00 100 YR. FLOODPLAIN
APPROVALS
DATE
DEPARTMENT OF COMMUNITY DEVELOPMENT
PLANNER/ZONING
ENGINEER
INSPECTIONS
ARB
DEPARTMENT OF FIRE RESCUE
ALBEMARLE COUNTY SERVICE AUTHORITY
VIRGINIA DEPARMENT OF TRANSPORTATION
HEALTH DEPARTMENT
Lic. No. 035791,'n
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1. THERE IS A FLOODPLAIN LOCATED ON THIS SITE. IMAP ID
51003CO280D DATED FEBRUARY 4, 2005. IN ADDITION, A DAM
' J I \ / - - J \\\ ` \ / _ _ _I \ =- _ _j - i /' BREACH INUNDATION ZONE EXISTS ON THE PROPERTY FOR THE
EXISTING FENCE - - w ' \� \ V J - - - SOUTH RIVANNA DAM WHICH IS A FEDERAL DAM LOCATED
v UPSTREAM OF THE PROPERTY.
2. A PROPOSED GREENWAY IS SHOWN ON THE SUBJECT PROPERTY.
3. BEFORE BEGINNING SITE WORK, THE CONTRACTOR SHALL
TMP: 046135-oo-oo-ooiCo I \EXISTING TREELINE - - - OWNER: COUNTY OF ALBEMARLE gINVESTIGATE AND VERIFY THE EXISTENCE AND LOCATION OF
\ \� \ / sti 00" \\\\ UNDERGROUND UTILITIES MECHANICAL AND ELECTRICAL SYSTEMS
ACREAGE: AC�e v- _ - _
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ZONING: PUD f, I L = - \ /. -_ O(/� \ - --_- — - - _ AND OTHER CONSTRUCTION AFFECTING THE WORK. BEFORE
ig73/473 I \ \\\ / T CONSTRUCTION THE CONTRACTOR SHALL VERIFY THE LOCATION
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/ ` �Il�ltlr d J \\\\\\\ \ \ \III\III 11 / / \ \\\\\ \\ OWNER: FOREST LAKES / "� SEWER, STORM SEWER, AND WATER -SERVICE PIPING;
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UNDERGROUND ELECTRICAL SERVICES AND OTHER UTILITIES. THE U)
III \\\ \\It/ \ \ �` —) > 1 \ \ - ACREAGE: 4.12 AC 1 " - " / CONTRACTOR SHALL FURNISH LOCATION DATA FOR WORK RELATED z
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NOTE: SEE BROOKHILL BLOCKS-
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(D.6.1450, PG. 313)
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JOB NO.
182150
SCALE
1 "=100'
777-
1992 3.38
EROSION do SEDIMENT CONTROL
EROSION CONTROL NOTES
DESCRIPTION OF EROSION & SEDIMENT
MEASURES:
1.
THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE
CONTROL MEASURES:
PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE IN
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
ACCORDANCE II THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
2.
ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND
EROSION AND SEDIMENT CONTROL MEASURES.
STRUCTURAL PRAC77CES USED IN 774/S SECTION CONSIST OF 774E FOLLOWING
MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF 774E VIRGINIA
IT IS AN7IC1PA7EO TO USE A CONSTRUCTION ENTRANCE, RIPRAP, OUTLET PROTECTION,
EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR
DIVERSIONS, SEDIMENT TRAPS, A UTILITY STREAM CROSSING, AND SILT FENCES TO CONTROL
3.01 SAFETY FENCE'
625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS.
SURFACE DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL LAND
A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL MEASURE.
TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY THE PUBLIC.
J.
ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR
DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS ARE NOT BE REQUIRED WITH THIS
APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH CAN BE
4.
AS 774E FIRST STEP IN CLEARING.
A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE
PROPOSED DESIGN. SHOULD FIELD ADJUSTMENTS NECESSITATE A SMALL STOCKPILE AREA, IT
CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC.
MAINTAINED ON THE SI7F AT ALL TIMES.
SHALL BE DISCUSSED WITH THE ESC INSPECTOR AHEAD OF TIME. THE STOCKPILE WILL NEED TO
3.02 CONSTRUCTION ENTRANCE
5.
PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN
BE MAINTAINED AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE
A STABILIZED CONS7RUCTI0N EN7RANCE LOCATED AT POINTS OF VEHICULAR INGRESS AND
INDICATED ON THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR
AND SHALL BE STABILIZED WITH A TEMPORARY VEGETA7VE COVER. PERMANENT SEEDING WILL
EGRESS ON A CONSTRUCTION S17E. TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO
WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION
BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE EXCAVATED AND WHERE
PAVED PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF. CONSTRUCTION ENTRANCES SHALL
BE INSTALLED AS SHOWN ON THE PLANS TO REDUCE 7HE AMOUNT SEDIMENT TRANSPORTED
CONTROL PLAN TO 774E OWNER FOR REVIEW AND APPROVAL BY 774E PLAN APPROVING
CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT SEEDING SHALL ALSO BE PERFORMED FOR
ONTO PUBLIC ROADWAYS.
6.
AUTHORITY.
THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION
ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF
3.03 CONSTRUCTION ROAD STABILIZATION:
CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTA7ON AS
SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE
774E 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
AND 077-IER SITE VEHICLE 7RANSPORTATION ROUTES WITH STONE IMMEDIATELY AFTER
7.
ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES
DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING VEGETATION IMMEDIATELY
GRADING. TO REDUCE EROSION OF TEMPORARY ROADBEDS BY CONSTRUCTION TRAFFIC
AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT
FOLLOWING GRADING OF THOSE AREAS. SELECTION OF SEED MIXTURE WILL DEPEND ON THE 77ME
DURING WET WEA7HER AND TO REDUCE EROSION AND SUBSEQUENT REGARDING OF
UNTIL FINAL STABILIZATION IS ACHIEVED.
OF YEAR APPLIED.
PERMANENT ROADBEDS BETWEEN 7HE TIME OF INITIAL GRADING AND FINAL STABILIZATION.
8.
DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED
USE WHEREVER STONE -BASE ROADS OR PARKING AREAS ARE CONSTRUCTED, WHETHER
FILTERING DEVICE.
PERMANENT OR TEMPORARY, FOR USE BY CONSTRUCTION TRAFFIC.
9.
774E CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY
3.01 SAFETY FENCE- TO DISCOURAGE ACCESS TO A PAR77CULAR AREA.
3.05 SILT FENCE:
AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR
3.02 CONSTRUCTION ENTRANCE - TO REDUCE THE AMOUNT OF MUD TRANSPORTED ONTO PAVED
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED
CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL
PUBLIC ROADS BY MOTOR VEHICLES OR RUNOFF.
ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND
10.
BE MADE IMMEDIATELY.
ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA.
3.03 CONSTRUCTION ROAD STABILIZATION - TO REDUCE THE EROSION OF TEMPORARY
DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION
OPERAT70NS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE, AND TO DECREASE
11.
ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL
ROADBEDS BY CONSTRUCTION TRAFFIC AND TO REDUCE THE EROSION AND SUBSEQUENT
THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE 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 1N177AL GRADING AND FINAL
FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH MINIMAL GRADES TO
OTHER DEBRIS.
STABILIZATION. CONSTRUCTION ROAD STABILIZATION WILL BE APPLIED TO THE CONTRACTOR
FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED. THEY SHALL BE
12.
BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION
PARKING &STAGING AREAS AS NEEDED.
INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN ACCORDANCE WITH THE
PER ZONING ORDINANCE SECTION 5.1.28.
VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH).
13.
ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-JOl
3.05 SILT FENCE- SILT FENCE IS PROPOSED, WHERE SHOWN ON THE PLANS.
OF 774E CODE OF ALBEMARLE.
3.07 STORM DRAIN INLET PROTECTION- INLET PR07EC77ON IS PROPOSED ON INLETS, WHERE
3.07 STORM DRAIN INLET PROTECTION.
14.
BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT
SHOWN ON THE PLANS.
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP
INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE SYSTEMS
SHALL BE LIMITED TO THE HOURS OF 7.•00 AM TO 9:00 PM.
309 DIVERSION- PERIMETER DIVERSIONS ARE PROPOSED WHERE SHOWN ON THE PLANS TO
PRIOR TO PERMANENT STABILIZA 77ON OF THE DISTURBED AREA. INLET PROTECTON APPLIES
15.
BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT
DIRECT RUNOFF INTO A SEDIMENT ]RAPPING DEVICE.
WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL BEFORE PERMANENT
MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS,
313 SEDIMENT TRAP- SEDIMENT TRAPS ARE PROPOSED WHERE SHOWN ON THE PLANS.
STABILIZATION OF THE CORRESPONDING DISTURBED DRAINAGE AREA.
PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY
PUBLIC STREET BECAUSE OF SLIDES, SINKING, OR COLLAPSE.
3.18 OUTLET PROTECTION -OUTLET PR07ECT70N IS PROPOSED AT THE OUTLET OF PIPES. 3.19
3.09 TEMPORARY DIVERSION DI
16.
774E DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR
RIPRAP- RIPRAP IS PROPOSED AT THE OUTLET OF PIPES.
A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A
CONVERT TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE
3.25 UTILITY STREAM CROSSING -A U77LITY STREAM CROSSING IS PROPOSED FOR THE
SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS
ALL EROSION CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE
CONSTRUCTION OF ARCHER AVENUE'S EXTENSION.
AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO
SALE OF ANY LOT, UNIT BUILDING OR 07HER PORT70N OF THE PROPERTY.
DIVERT SEDIMENT -LADEN RUNOFF FROM A DIS77JRBED AREA TO A SEDIMENT -TRAPPING
17.
TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING
3.32 PERMANENT SEEDING -PERMANENT SEEDING IS REQUIRED AND PROPOSED W77H THIS PLAN.
FACILITY SUCH A SEDIMENT TRAP OR SEDIMENT BASIN USE WHEREVER
IS TO BE AT 75 LBS ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO
3.38 TREE PRESERVATION AND PROTECTION- TREE PROTECTION IS PROPOSED W1774 THIS PLAN.
D SLOPESRMWA
E O
RUNOFF MUST BE TEMPORARILY DIVERTED 70 PROTECT DISTURBED AREAS AND SLOPES OR
RETAIN SEDIMENT ON S17E DURING CONSTRUC7ON. THESE STRUCTURES GENERALLY HAVE A
CONSIST A 50150 MIX OF ANNUAL RYGRASS AND CEREAL WINTER RYE, OR IN MARCH
SEE THE ESC PLAN FOR THE REQUIRED LOCATIONS.
LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH PROPER
AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF
3.39 DUST CONTROL -DUST CONTROL IS REQUIRED AND PROPOSED K17H THIS PLAN.
MAINTENANCE.
GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNA77VES
ARE SUBJECT TO APPROVAL BY THE EROSION CONTROL INSPECTOR.
3.11 7EMPORARY RIGHT-OF-WAY DIVERSION.'
A RIDGE OF COMPACTED SOIL OR LOOSE ROCK OR GRAVEL CONS7RUCTED ACROSS
18.
PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND
MAINTENANCE,
DISTURBED RIGHTS -OF -WAY AND SIMILAR SLOPING AREAS. TO SHORTEN THE FLOW LENGTH
MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF,
WITHIN A SLOPING RIGHT-OF-WAY, THEREBY REDUCING THE EROSION POTEN 7AL BY
INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT
IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK ALL EROSION
DIVERTING STORM RUNOFF TO A STABILIZED OUTLET. GENERALLY, EARTHEN DIVERSIONS ARE
1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING
AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH SIGNIFICANT RAINFALL. MONITORING
APPLICABLE WHERE THERE WILL BE LITTLE OR NO CONSTRUCTON TRAFFIC W77HIN THE
SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 957 KENTUCKY 31 OR TALL
REPORTS WILL BE REQUIRED FROM THE RLD IF NEEDED. SPECIFIC AT7ENT70N WILL BE GIVEN TO
RIGHT-OF-WAY. GRAVEL S7RUCTURES ARE MORE APPLICABLE TO ROADS AND 07HER
FESCUE AND 0-57 PERENNIAL RYGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS
THE FOLLOWING ITEMS.,
RIGHTS -OF -WAY WHICH ACCOMMODATE VEHICULAR 7RAFFIC.
TO BE APPLIED AT 80LBS/100SF. ALTERNA77VES ARE SUBJECT TO APPROVAL BY THE
a. SEDIMENT BASINS AND/OR TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE WITH
EROSION CONTROL INSPECTOR.
THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK.
A T TEMPORARY SEDIMENT TRAP:
A TRY PODDING AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH A
19.
MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH
ALL GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP 7HAT WILL
b. PREVENT PROPER DRAINAGE. IF THE GRAVEL IS CLOGGED BY SEDIMENT, THE GRAVEL WILL BE
STONE OUTLET. 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.
ENOUGH TO ALLOW THE MAJORITY OF 774E SEDIMENT TO SETTLE OUT. USE BELOW
IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 507 OF THE WET STORAGE
c. ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION
DISTURBED AREAS WHERE 774E TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3 ACRES,
VOLUME IS FILLED K17H SEDIMENT ALL SEEDED AREAS ARE TO BE RESEEDED WHEN
OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL BE REMOVED WHEN THE LEVEL
WHERE 774E SEDIMENT TRAP WILL BE USED NO LONGER 774AN 18 MONTHS, AND IT MAY BE
NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION
OF SEDIMENT DEPOSITION REACHED HALF WAY TO THE TOP OF THE BARRIER.
CONS7RUC7ED EITHER INDEPENDENTLY OR IN CONJUNCTION 1147H A TEMPORARY DIVERSION
DYKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED
d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND IS
DIKE.
AND REPAIRED IMMEDIATELY.
MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED.
314 TEMPORARY SEDIMENT BASIN:
20.
ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED
IN CASE OF EMERGENCY THE PRIMARY CONTACT FOR 774E PROJECT WILL BE THE RLD OR
A TEMPORARY BARRIER OR DAM WITH A CONTROLLED RELEASE STRUCTURE
WI7NlN 30 DAYS OF FINAL SITE STABILIZATION WHEN MEASURES ARE NO LONGER
CONTRACTOR ON -SITE. THE CONTRACTOR AT THIS TIME IS DIGS. BROOK WOOD WITH DIGS MAY
FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTEDACTED SOILOIL ACROSS A
NEEDED, SUBJECT TO APPROVAL BY 774E EROSION CONTROL INSPECTOR.
BE REACHED AT (434) 978-4435. IN ADDITION THE OWNER MAY BE CONTACTED. UPON
DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DIS7URBED AREAS
21.
THE E&S INSPECTOR HAS THE AUTHORITY TO ADD OR DELETE E&S CONTROLS AS
COMPLETION OF 774E PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE MAINTENANCE.
IN "WET" AND `MIRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO
NECESSARY IN THE FIELD AS SITE CONDITIONS CHANGE. IN ADDITION NO SEDIMENT
SETTLE OUT APPLIES BELOW DISTURBED AREAS WHERE 774E TOTAL CONTRIBUTING DRAINAGE
BASIN OR TRAP CAN BE REMOVED WITHOUT WRITTEN AUTHORIZATION.
AREA IS EQUAL TO OR GREATER THAN THREE ACRES THERE MUST BE SUFFICIENT SPACE
AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUCTION OF A TEMPORARY IMPOUNDMENT.
TABLE 3.31.B
3.18 OUTLET PROTECTION:
SOIL DESCRIPTION
pCCEPTABLETEMPORARY SEEDING PLANT MATERIALS
STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY D1SSIPA77NG DEVICES PLACED
AT THE OUTLETS PIPES PAVED CHANNEL SECTIONS TO PREVENT SCOUR AT
273-ELIOAK LOAM-2 TO 7% SLOPES. SOIL IS WELL DRAINED WITH A MEDIUM RUNOFF
-QUICK REFERENCE FOR ALL REGIONS"
STORMWATER OUTLETS, TO PRR OTECT THE OUTLET S7RUC7URE AND TO MINIMIZE 774E
-
CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0 B THICK. THE
P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING 774E VELOCITY AND ENERGY OF
DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80".
CONCENTRATED STORMWA7ER FLOWS: APPLICABLE TO THE OUTLETS OF ALL PIPES AND
27C-ELIOAK LOAM-7 TO 15% SLOPES. SOIL lS WELL DRAINED WITH A MEDIUM RUNOFF
Rate
ENGINEERED CHANNEL SECTIONS.
CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0-8" THICK. THE
Plantlne DatesSpecies
acre
319 RIPRAP:
DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80".
A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE K17H
39D-HAZEL LOAM-15 TO 257 SLOPES. SOIL IS EXCESSIVELY DRAINED WITH A MEDIUM
FILTER FABRIC OR GRANULAR UNDERLINING TO PROTF_CT THE SOIL FROM THE EROSIVE
-Feb.
RUNOFF CLASSIFICATION. SURFACE LAYER IS TYPICALLY LOAM AND ABOUT 0 f0"
Sept.Se t. 1 eb 15 50 50 Milt of
P /
FORCES OF CONCENTRATED RUNOFF SLOW THE VELOCITY OF CONCENTRATED RUNOFF WHILE
THICK. THE DEPTH TO THE WATER TABLE IS GENERALLY MORE THAN 80".
Annual
ENHANCING THE POTENTIAL FOR INFILTRATION, AND TO STABILIZE SLOPES WI7H SEEPAGE
multi -SS
(Lolium multi-Oorum)
PROBLEMS, AND/OR NON -COHESIVE SOILS USE WHEREVER SOIL AND WATER INTERFACE
REFERENCE., WEB SOIL SURVEY ONLINE DATABASE, FOUND AT
&.
so- 100
AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY, EXPECTED VEGETATIVE
http://websoilsurvey.nres.osda.govloppIWebSoilSurveyospx
Cereal (Winter) Rye
COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER 7H£ DESIGN FLOW CONDITIONS.
3.25 U77LITY STREAM CROSSING.
(Secale cereale)
A STRATEGY FOR CROSSING SMALL WATERWAYS WHEN IN -STREAM U77LITY CONSTRUCTION IS
INVOLVED. TO HELP PROTECT SEDIMENT FROM ENTERING 774E STREAM FROM CONSTRUCTION
EROSION CONTROL NOTES
Feb.G Apr. 30 Annual Ryegrass
. - P '
60 • Too
K17HIN APPROACH AREAS. TO MINIMIZE 774E AMOUNT OF DISTURBANCE W77HIN 774E STREAM
ITSELF. GENERALLY APPLICABLE TO FLOWING S7REAMS W1774 DRAINAGE AREAS LESS 774AN
ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION
(Lolium multi-flonim)
ONE SQUARE MILE.
AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED
ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA
3.31 TEMPORARY SEEDING.,
7HE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY SEEDING
EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR
May 1 - Aug 31 German Millet
50
WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS. TO REDUCE EROSION AND
625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS.
(Setaria italica)
SEDIMENTATION BY STABILIZING DISTURBED AREAS 7HAT WILL NOT BE BROUGHT TO FINAL
ES-2. 7HE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO
GRADE FOR A PERIOD OF MORE 774AN 30 DAYS. TO REDUCE DAMAGE FROM SEDIMENT AND
THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE
RUNOFF TO DOWNSTREAM OR OFF-S17E AREAS AND TO PROVIDE PR07EC77ON TO BARE
COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO
SOILS EXPOSED DURING CONSTRUCTION UN77L PERMANENT VEGETATION OR 0774ER EROSION THE FINAL INSPECTION.
CON7ROL 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 COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL
7HE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY PLAN77NG BE MAINTAINED ON THE SITE AT ALL TIMES.
SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED AREAS. TO ES-5:PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN
PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS ECONOMICAL, ADAPTABLE INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE
TO S17E CONDITIONS, AND ALLOWS SELECTION OF THE MOST APPROPRIATE PLANT MATERIALS ,
TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL BEAUTY. UPON COMPLETIONBORROW OR WASTE AREAS
OF ONTROL PLAN TO THE OWNER FOR REVIEW AND
CONSTRUCTIAC77
ON ACTIVITIES, ALL AREAS WILL RECEIVE A PERMANENT VEGETATIVE COVER. SUPPLEMENTARY EROSION CTHE CONTRACTOR SHALL SUBMIT A
APPROVAL BY 774E PLAN APPROVING AUTHORITY.
3.38 TREE PRESERVATION AND PROTECTION: ES-6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL
PR07EC77ON OF DESIRABLE TREES FROM MECHANICAL OR 077-IER INJURY DURING LAND EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
DISTURBING AND CONSTRUCTION ACTIVITY. TO ENSURE 7HE SURVIVAL OF DESIRABLE TREES SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AU7HOR1TY.
WHERE 7HEY WILL BE EFFECTIVE FOR EROSION AND SEDIMENT CON7ROL WATERSHED - ES ].•ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
PROTECTION LANDSCAPE BEAUTIFICATION DUST AND POLLUTION CONTROL NOISE REDUCTION
MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING
SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS BEING CONVERTED FROM
F R T T R AN TYP US S APPLIES IN 7R INHA l AR AS SU T T AN S17E DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
e' "DOMEOa I .
DD TEMPORARY 18" DIVERSION BERM
0 ES 0 U B - E E . EE- B TED E B✓EC 0 C D ES-8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN
DISTURBING ACTIVITIES
APPROVED WATER FILTERING DEVICE.
ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES
339 DUST CONTROL: 1. SET POSTS AND EXCAVATE A 4 X4"
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING DEMOLITIONPERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT. ANY AND TRENCH UPSLOPE ALONG THE LINE
NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE
CONSTRUCTION ACTIVITIES TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM OF POSTS
EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
MAY PRESENT HEALTH HAZARDS TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR PLANT
LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR
MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN
` ACCORDANCE K17H 774E VESCH i�
� v I ll� f / /
TABLE 3.39-A
ADHESIVES USED FOR DUST
CONTROL
Water
Application
Dilution
Type of
Rate
Adhesive
(Adhesive: Water)
Nozzle Gallons/Acre
Anionic
Asphalt Emulsion
7:1
Coarse Spray
1,200
Latex Emulsion
12.5:1
Fine Spray
P Y
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 (3:1 OR LESS) PER ACRE
TOTAL LBS
KENTUCKY 31 FESCUE 128 LBS.
RED TOP GRASS 2 LBS.
SEASONAL NURSE CROP 20 LBS.
SEASONAL NURSE CROP 150 LBS
FEBRUARY 16 THROUGH APRIL ANNUAL RYE
MAY 1 THROUGH AUGUST 15 FOXTAIL MILLET
AUGUST 16 THROUGH OCTOBER ANNUAL RYE
NOVEMBER THROUGH FEBRUARY 15 WINTER RYE
NOTES:
1. LIME AND FERTILIZER NEEDS SHALL BE DETERMINED BY SOIL
TESTS AND APPLIED IN ACCORDANCE WITH VESCH STD. 3.32.
2. SEEDINGS TO BE MULCHED IMMEDIATELY UPON COMPLETION
OF SEED APPLICATION IN ACCORDANCE W VESCH STD 3.35.
PS PERMANENT SEEDING SCHEDULE
NO SCALE
(STD. & SPEC. 3.32 OF VIRGINIA EROSION &
SEDIMENT CONTROL HANDBOOK, 3RD ED.)
/ A_
' III
11111-
FLOW - III 1-
4
J. ATTACH THE FILTER FABRIC TO
THE WIRE FENCE AND EXTEND
ITINTO THE TRENCH.
I �
'u
1�-- = 1
II
II
/i
-III-
_-11
II_
=1'
= _III -III_
�I1 I 1
- I-1 I II � I_
2. STAPLE WIRE FENCING TO
THE POSTS.
4. BACKFILL AND COMPACT 774E
EXCAVATED SOIL.
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
UPER SILT FENC
ssF WITH WIRE -BACK o5-
NO SCALE
1992
EROSION CONTROL NOTES do NARRATIVE
PROJECT DESCRIPTION:
THE PURPOSE OF THIS LAND DISTURBANCE ACTIVITY IS TO CONSTRUCT THE ARCHER AVENUE ROAD EXTENSION FROM THE BROOKILL
SUBDIVISION TO ASHWOOD BOULEVARD. A PORTION OF THIS PROJECT IS Wl7HIN THE LAND DISTURBANCE LIMITS APPROVED WITH THE
BROOKHILL BLOCKS 9, 10, & 11 VSMP PLAN (WPO202000004). THIS PROJECT PROPOSES TO DISTURB AND ADDITIONAL 3.44 oa OF LAND.
THE PROJECT WILL BEGIN ITS CONSTRUCTION K17H THE PROPOSED ESC MEASURES IMMEDIATELY FOLLOWING PLAN APPROVAL, WHICH IS
ANTICIPATED TO BE IN 774E FALL OF 2023. THE WORK IS ANTICIPATED TO BE COMPLETED WITHIN 12 MON774S AND TO CONCLUDE IN THE
FALL OF 2024.
EXISTING SITE CONDITIONS'
THE AREA OF THE PROPOSED DEVELOPMENT IS LARGELY WOODED AREAS WITH OPEN SPACES AND LIGHT UNDERBRUSH. THIS S17E
GENERALLY SLOPES FROM THE WEST TO THE EAST, AND FROM THE NORTH TO THE SOUTH. THE SITE IS GENERALLY STEEP AND IS WELL
DRAINED.
ADJACENT AREAS'
THIS SITE IS BORDERED ON 774E EAST BY EXISTING FOREST LAKES RESIDENTIAL DEVELOPMENT. NOR774 OF THE PROPOSED S17E IS
ASHWOOD BOULEVARD. WEST OF THE DEVELOPMENT IS ROUTE 29, AND THE BROOKHILL DEVELOPMENT EXISTS TO THE SOUTH.
OFFS17E LAND DISTURBANCE:
OFFSI7E LAND DISTURBANCE IS LIM17ED TO PUBLIC RIGHT-OF-WAY AND AREAS LOCATED WITHIN THE OVERALL BROOKHILL DEVELOPMENT
BOUNDARY.
SOILS'
SEE SOIL DESCRIPTIONS ON THIS PAGE AND THE PHASE I ON & SEDIMENT CONTROL PLAN FOR BOUNDARIES, SOIL TYPES AND SOIL
DESCRIPTIONS.
CRITICAL AREAS'
EXISTING WETLANDS AND INTERMITTENT STREAMS ARE LOCATED ON THE PROJECT SITE THESE AREAS, IN ADDITION TO THE MANAGED AND
PRESERVED STEEP SLOPES, ARE CONSIDERED TO BE CRITICAL AREAS 7HE CONTRACTOR SHALL GIVE EXTRA ATTENTION AND CAUTION IN
AND AROUND THESE AREAS TO ENSURE SEDIMENT IS NOT DEPOSITED ON THEM OUTSIDE THE SCOPE OF THE PROPOSED PLAN. TREE
PR07EC77ON FENCING SILT FENCING DIVERSIONS AND SEDIMENT TRAPPING DEVICES SHALL ALSO BE INSTALLED AS A FIRST STEP IN LAND
DISTURBANCE TO ENSURE THESE CRITICAL AREAS ARE MAINTAINED.
SEQUENCE OF CONSTRUCTION:
1. CONTRACTOR SHALL NOTIFY THE ALBEMARLE COUNTY COMMUNITY DEVELOPMENT ENGINEERING DEPARTMENT TO SCHEDULE A
PRE -CONSTRUCTION MEETING.
2. PRIOR TO DISTURBANCES, THE LIMITS OF DISTURBANCE AND PRESERVED SLOPES SHALL BE FLAGGED AND THE TREE PROTECTION
FENCING SHALL BE INSTALLED. NO GRADING MAY BEGIN UN77L THE LIMITS OF DISTURBANCE AND PRESERVED SLOPES HAVE BEEN
FLAGGED AND THE 7REE PR07EC77ON HAS BEEN INSTALLED.
J. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONS7RUC770N PROCESS WITHOUT THE APPROVAL FROM THE
INSPECTOR ON THE PROJECT.
4. INSTALLATION OF THE PROPOSED CONSTRUCTION ENTRANCE SHALL OCCUR NEXT. 774E CONTRACTOR SHALL APPLY CONSTRUCTION
ROAD STABILIZATION AS NEEDED. CONTRACTOR SHALL ENSURE THE CONSTRUCTION ENTRANCE DRAINS TO AN ADEQUATE E&S
MEASURE. THE CONTRACTOR SHALL INSTALL SEDIMENT TRAP #1 FOR VEHICULAR WASH OFF, ALONG WITH THE ASSOCIATED DIVERSION
BERMS AND RIGHT OF WAY DIVERSION BERM. CONSTRUCTION EN7RANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES
INTERSECT PAVED PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING
ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL BE CLEANED
THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY SHOVELING OR SWEEPING AND
TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. S7REET WASHING SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED
IN THIS MANNER. SEDIMENT LADEN RUN-OFF FROM THE CONSTRUCTION ENTRANCE AND DISTURBED AREA WITHIN THE DRAINAGE
AREA TO SEDIMENT TRAP #5 SHALL BE ROUTED TO THE TRAP K17H 7HE INSTALLATION OF THE DIVERSION BERMS AND ROW
DIVERSION BERM.
5. ONCE THE CONSTRUC770N ENTRANCE HAS BEEN INSTALLED ALONG WITH SEDIMENT TRAP #1 AND ITS ASSOCIATED DIVERSION BERMS
l - {.I� II•
.� �var CORRECT TRUNK ARMORING
NO
TRIANGULAR BOARD FENCE
AND RIGHT OF WAY DIVERSION BERM, THE CONTRACTOR SHALL RE-ROUTE 774E EXISTING BLOCK 9, 10, & 11 SWM BASIN OU7FALL,
THEN INSTALL THE U77LITY STREAM CROSSING (PROPOSED CULVERT CROSSING.)
6. THE CON7RACTOR SHALL INSTALL THE 6' WIDE 2: 1 SIDE SLOPE TYPE B UTILITY STREAM CROSSING AS SHOWN AND NOTED ON PHASE Source: Va. DSWC
I OF THE EROSION AND SEDIMENT CONTROL PLANS THIS SHALL INCLUDE THE S7REAM DIVERSION AND THE INSTALLATION OF THE
CULVERT. ONCE 774E COUNTY AND VDOT INSPECTORS HAVE APPROVED THE CULVERT INSTALLATION, THE CONTRACTOR MAY INSTALL
THE FILL MATERIAL OVERALL THE CULVERT. THE DOWNSTREAM EROSION CONTROL MEASURES SHALL BE INSTALLED PRIOR TO THE Powd construction entrance for crosion control plans
INSTALLATION OF THE FILL MATERIAL, WHICH INCLUDES THE WIRE SILT FENCE. THE CONTRACTOR SHALL INSTALL ENOUGH FILL
MATERIAL OVER THE CULVERT PIPE TO SUPPORT 774E WEIGHT 774AT WILL BE AC77NG UPON IT FROM CONSTRUCTION TRAFFIC TO
ACCESS THE AREAS ON THE NORTH SIDE OF THE CULVERT PIPE. ALSO, 2 ROWS OF SUPER SILT FENCE SHALL BE INSTALLED ALONG
THE PERIMETER OF THE CONSTRUCTION S17E SEE THIS SHEET FOR THE SUPER SILT FENCE DETAIL.
7. ONCE ENOUGH FILL MATERIAL HAS BEEN INSTALLED FOR A STREAM CROSSING WITH THE EARTH MOVING EQUIPMENT, THE
CONTRACTOR SHALL CON77NUE TO INSTALL THE REMAINING ESC CONS7RUC77ON MEASURES, AS SHOWN ON THE PHASE I EROSION &
SEDIMENT CONTROL PLAN. THE MEASURES INCLUDE INSTALLING THE PERIMETER SILT FENCE AND PERIMETER DIVERSION BERMS.
PERIMETER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP M7H ANY LAND DISTURBANCE
ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.
B. ONCE THE PERIMETER EROSION CONTROL MEASURES HAVE BEEN INSTALLED, AND 7HE COUNTY INSPECTOR HAS APPROVED THESE
MEASURES, THE CONTRACTOR MAY PROCEED WITH THE LAND CLEARING OPERATIONS FOR THE INSTALLATION OF THE SEDIMENT TRAPS.
THE CON7RACTOR SHALL BEGIN BY CLEARING 774E AREAS REQUIRED TO ACCESS THE LOCATIONS OF SEDIMENT TRAPS 2 & J.
INSTALLATION OF SEDIMENT TRAPS J2 & #3 SHALL IMMEDIATELY FOLLOW THE SELECTIVE CLEARING. FOLLOWING THE INSTALLATION OF
THESE MEASURES, THE CONTRACTOR SHALL INSTALL THE DIVERSIONS. ANY REMAINING EROSION CON7ROL ITEMS AS SHOWN ON THE
PHASE I EROSION CONTROL PLAN SHALL ALSO BE CONSTRUCTED AT THIS TIME.
9. ONCE ALL THE PHASE I EROSION CONTROL ITEMS HAVE BEEN INSTALLED & ARE OPERATIONAL DRAINAGE IS PROPERLY CONVEYED TO
THESE MEASURES AND 774E ESC INSPECTOR HAS GRANTED APPROVAL 774E CONTRACTOR CAN BEGIN CLEARING 7HE REMAINDER OF
THE SITE TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED.
10. AFTER CLEARING THE PROPOSED AREAS, THE CON7RACTOR CAN PROCEED TO PHASE ll OF 7HE EROSION & SEDIMENT CON7ROL PLAN.
THE CONTRACTOR SHALL BEGIN ROUGH GRADING THE SITE TO THE CONTOURS SHOWN ON THE PHASE 9 EROSION & SEDIMENT
CONTROL PLAN. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A FIRST STEP WITH ANY LAND DISTURBANCE
ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE TAKES PLACE.
11. THE CONTRACTOR SHALL INSTALL ANY REMAINING EROSION CONTROL 17EMS AS SHOWN ON THE PHASE lI EROSION CON7ROL PLAN.
TEMPORARY SEEDING, PERMANENT SEEDING AND DUST CONTROL SHALL BE IMPLEMENTED AS REQUIRED.
12. PERMANENT OR TEMPORARY SOIL STABILIZA7ON SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS AFTER FINAL GRADE IS
REACHED ON ANY PORTION OF THE S17E. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED W TVIN SEVEN DAYS TO DENUDED
AREAS 7HAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS PERMANENT
STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
13. ONCE THE SITE IS ROUGH GRADED, 7HE CONTRACTOR SHALL BEGIN PHASE Ill OF 7HE EROSION & SEDIMENT CON7ROL PLAN. THE
CONTRACTOR CAN BEGIN INSTALLATION OF THE U7ILl77ES, CURB AND GUTTER, AND ROADS. INLET PROTECTION SHALL ALSO INSTALLED
AS THE STORM SEWER IS CONSTRUCTED. INLET PROTECTION SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL
BE MADE AS NEEDED. IF THE STONE FILTER BECOMES CLOGGED K17H SEDIMENT SO THAT IT NO LONGER ADEQ UATFLY PERFORMS ITS
FUNCTION THE STONE MUST BE PULLED AWAY AND CLEANED AND OR REPLACED.
14. THE CON7RACTOR SHALL WORK WITH 774E ESC INSPECTOR ON THE TIMING OF THE REMOVAL OF SEDIMENT TRAPS #1 & j2. SEDIMENT
TRAPS #1 & #2 SHALL BE REMOVED AFTER THE STORM SEWER AND INLET PROTECTION ARE INSTALLED AND ARE MADE OPERATIONAL.
THE CON7RACTOR SHALL FILL SEDIMENT 7RAPS #1 & #2 AS THESE LAST AREAS ARE BROUGHT UP TO FINISHED GRADE AND PAVED/
SEEDED. THE CONTRACTOR SHALL PAY SPECIAL ATTENTION TO THE SILT FENCE BENEATH THESE AREAS AT THIS 77ME AND ENSURE IT
CON77NUES TO BE EFFECTIVE.
15. ONCE PHASE 111 OF CONSTRUCTION IS COMPLETE, THE S17E IS STABILIZED AND 774E INSPECTOR HAS GIVEN APPROVAL, 774E
CON7RACTOR CAN THEN CONVERT SEDIMENT TRAP #3 INTO THE PROPOSED SWA1 FACILITY & INSTALL THE PROPOSED LEVEL
SPREADER. AT THIS TIME, THE CONTRACTOR CAN REMOVE 7HE REMAINDER OF 7HE EROSION & SEDIMENT CONTROL MEASURES NO
ITEM SHALL BE REMOVED THROUGHOUT ALL PHASES OF CONSTRUCTION UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE
INSPECTOR GIVES PERMISSION.
16. THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN 774E VIRGINIA EROSION AND SEDIMENT
CON7ROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE W7774 THE VIRGINIA
EROSION AND SEDIMENT CON7ROL HANDBOOK.
17. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED W77H/N 30 DAYS AFTER FINAL S17E STABILIZATION
OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY 7HE LOCAL PROGRAM
ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES
SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION.
3.01 1992
--
_
- _ _
- -
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T' l
1 l
I IIIIIIIIIIF•IIIIIIIIIIIIIIIIIII
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.4R'.i,wi' 1 i��•il i�i•�•i i.�•���•i
ii
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Source: Adapted from Conwed Plastics and
VDOT Road and Bridge Standards
70' MIN.
r3" SIMI ASPHALT TOP
CO4RSE
2X
bMN 2'A AC.:, c;,AIE BASE
PROFILE
70' MIN.
R T
A
AS HAL PAVED
W N AS RACK
Plate 338-2
PAVEMENT
rEX15TINQ
Ix PAVEMFN
I127G '2' MIN.•
•MOST ExrEND FULL Lo I-POSITVE DRAINAGE
F IN R
TO SEDIMENT
0 CRESS AND EGRESS
PPI
t
TRA NC DEVICE
OPERATION
ELAN
12' MIN. POSITIVE DRAINAGE
2x TO SEDIMENT
TRAPPING DEVICE
- - - - - - i:PYfkcirl.:rfrb•l--�lYnur._ - -
3.25 1992
DIVERSION
• i
FLOW
FORMER LOCATION I
:.0::e!.
.
_A111 ;;
FOR CROSS-SIS(
. ��
/
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•
= .T:X i':
• `•
atA! ��,
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I I
(
NCRMNO
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FOR IWTML CROSSINGS) _',
f AT
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�► i�
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Plate 3.01-1
Source: Va. DSWC
4•41.1fl
ORIGINAL
STREAM -
BED
-49
1
FLOW BARRIER
\
(RFR.AP. SANDBAGS.
PLYWOOD, JERSEY
APPROACHING
-BARRIERS OR SHEET
TRENCHING
PILING)
OPERATION
' PLACE RPRAP
AT TRANSITION
SECTION A -A
A nmmlauu wale tap of I inch nowt be w.A.a0LA WTIh a ummiNua 1 alch balk ock,
zhusoHcah a Kllpph'ayt a wash hose uitli a thuuLda of 1 A u/Lhes lot adeylule
wash
. T - Ts c C OIVILM I>I es.'Tae. h K'AIL'I Illlt 1 I e Lamed A a (low the rI14 AITce to an
Wtm oi'ed .ettluts a ea to icntot'e Aetla11a11 All Aetll ujwl Alan be pl a cuted ho1a
entering stonu Lh am dttc [it, of wat",..turr<
PAVED WASH RACK
-.-,ALE
Q
DIVERSION CHANNEL CROSSING
ACCEPTABLE LININGS
(CROSS SECTION A -A OF PLATE 3.25-1)
SILT FENCE POST
POSE SILT EOIGE
TYPE A DIVERSION
POLYEtMLENE IS .IL. MIN.
OR
GRASS VIER
r
EXISTING GROUND �� '� EXBFnNG GROUND
TYPE B DIVERSION
RIPRAP FILTER CLOTH
EKISTING GROOND ?;j ,j.'Y EXISTING GROUND
6' _�
TYPE C DIVERSION
RIPRAP FILTER CL M
RUCK OR SNa1BAG UNEIR
EI(ISRNG GROUND 1�) K" E)lISI1NC GROUND
• 6- MINIMUM OR WIDTH OF EXISTING STREAM ""EVER IS LESS
•• ENTRENCH SILT FENCE AND FILTER CLOTH N SAME TRENCH
Plate 315-1 Source: Adapted from VDOT Standard Sheets
Plate 3.25-2
SCOTTFR. CII 'LLINS_Z
Lie. No. 035791 �
p 3/3/23 `��1
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JOB NO.
182150
SCALE
N/A
SHEET NO.
3
PERIMETER SILT FENCE:
CONTRACTOR SHALL INSTALL 2 ROWS OF SUPER SILT
FENCE ALONG THE PERIMETER OF THE CONSTRUCTION
SITE. SEE SHEET 3 FOR SUPER SILT FENCE DETAIL. / %/ ✓ ✓///6j / i /
/ / ✓/ /ice / /
-458-
NNN
NNN
\\
\ \ \\ \ \
\ V A
\ \\ \ \ \\
Av/
/A9s
EXISTING STREAM
jPROPOSED bU FALL, SEE
a,
PROPOSED SWM SHEETS FOR DETAILS /
STEEP SLOPES (TYP.)\ MITS OF DIST RBANC A'
XISTING MANAGEb A \
E APPROVED'
PROPOSED LIMEYS C dI 0R ANCE/ /
EXPANSION (ADDITIONAL 3.44 ac.) / PHASE I DRAINAGE AREA TO
1 / / SEDIMENT TRAP #3 = 0.15 ACRES
I PROPOSE/ D LIMITS
/ OF THE CLEEARING �/ / / / / � PROPOSED SAFETY FENC�E,
QNSTALL SIGNS "WARNING
V ,QUICK SAND, KEEP OUT"
�POSEO BAFFLE, SI
ON SHEET 7�
SUPPORT SF A I I a
TP
SOIL YPE/
PROPOSED 18" DIVERS 014. CONTRACTOR -
PROPOSED —
FLOW BARRIER (SANDBAGS, PLYWOOD, JERSEY BARRIERS OR \ \1 �; / he'- \, \ \ \ \ \SHALL ENSURE POSITIVE SLOPE IS
/ EQUIVALENT). SEE SHEET 3 FOR ADDITIONAL STREAM CROSSING DETAILS. \ \ MAINTAINED. BERM SHALL BE STABILIZED
CONTRACTOR SHALL REMOVE PROPOSED FLOW BARRIER & STREAM /
\ \ \ \ D AS A FIRST STEP IN DISTURBANCE. —
/ DIVERSION ONLY AFTER THE CULVERT INSTALLATION HAS BEEN COMPLETED; RR PROPOSED SAFETY FENCE, PROPOSED VDOT
ACCEPTED BY VDOT AND THE ESC INSPECTOR GRANTS APPROVAL./A STD. L. AI RIPRAP \ \
\ SAF INSTALL SIGNS "WARNING
/ \ AT TRANSITION \
QUICK SAND, KEEP OUT"
Lv
///
'.a�".i /. / /. STING SWM OUTFACE T BE RE- UTED. ; �� s ,v..
TH OF
ISCOTT R. LINSZ
C.) Lic. No. 035791 �
) I 0� 3/3/23
X
SIONAL 't`I
_ A- � SOILT\YPE
\ I \ \ I1
/ \\k 27Bl
75
XF so A z w
I A 0� o
I V N
;OIL BO ND RYf(TY } V A I w
W
z
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♦,��/.p / / �� ) DRAINAGE DIVIDE (TYP.) II A I I I z
c Ln
/ / V yh } / 11 PROPOSED LIMITS OF `
\ /
� � DISTURBANCE / g \
/�}\ �� EXPANSION SF w 1� ui
(ADDITIONAL 3.44 ac. /
PROPOSED s I \ I I
wli�Jy / STOCKPILE
SURROUNDED a� \
BY SILT FENCE V A
_ — SEDIMENT TRAP #2 = 2.06 ACRES / i SSF ssFLu r-4
�
/ ry
— ' --SOIL DESCRIPTION (TYP.) / / / / / \ \ I I `
\ \ \ C(1NT ACTCI Tn NSTAI A
— _ — — 27C / / / / / / / / / \ ss ENTER/EXIT ASHWOOD BLVD.'
/ / / _%
// ✓ / / //�� � v �,�� � �/I � I � ICI
ROPOSED-18" DIVERSION. CONTRACTOR
SHALL ENSURE POSITIVE SLOPE IS / /� / — _ �/� \�\III 1 II I \N / I I I C')
AINTAINED. BERM SHALL BE STABILIZED / / �rf I / I I I I Ip Lu
AS A FIRST STEP IN DISTURBANCE:'
-- J
TP / SF w/#Y/ co I
/ s�uR j I PROPOED LIMITS OF I I (�J
DISTURBANCE EXPANSION
(ADDITIONAL 3.44 ac.)
BROOK
PLAN •\
TREE CLEARING
I _ LIWL NN
V)
SbIL\V
j SWM FACILITY APPROVED WITH, d
WP0202000004 - BROOKHILL 39Q\ Sul CA
/CKS 9, 10, & 11 VSMP "IRE\
Z
I I I I N z
\ V A\ �, /f wl WIRE S PpOvRT
T ) \
/ / / /" / SUPPORT SF r \ SF — /- / / / / /� I I Q O J
SOILTYPE / %/ /�/�'/ V A\ \ \ / / / i J o / / \ /� i )/� / / — / / V
w s w IRE \ RAINAGE DIVIDE TYP. / XIST NG STREAM 1 I ~
7 I / x / \ / / \ /� T� SF / \ R ' / E i' I I I
�o� V \\ V / ,� su�PORT\ �� v I LLl oC
\\ F \\ / / / / _ _J Z
/` / / / / /— / / " // �v \ I �\ J Z
/ �/ \ — W
\ ER I STALLATION NOTES: (ALSO SEE SHEET 3'S SEQUENCE O CONS�NOTES #6&7 A V t O \ rr / / / PROPO ED ALIGNMENT OF s i - /
/'f / / — WiR� CONTRACTOR SHALL INSTALL AND MAINTAIN A 6' WIDE WITH za SIDE SLOPES TYPE BSTREAM / I I I W
STREAM DIVERSION WHILE USC \ h4 SUPPOOR / FLOW DIVERSION PER DIVERSION CHANNEL CROSSING VESCH DETAIL 3.25-1 AND 3.25-2 DURING 1 \ \ LLI
CULVERT IS INSTALLED N/R�OSED BAFFLE, E i _ 1 1 \ \ ~ Lu
l� ENTIRE CULVERT CONSTRUCTION OPERATION. \
,5 \ \ \ / / / / / // `' - / �� I hhe - PROPOSE IM TS OF / L S z. SILT FENCE SHALL BE INSTALLED ON BOTH SIDES OF THE PROPOSED STREAM DIVERSION CHANNEL. �\ J \ O Lu
k / DISTURBANCE FTAk ON SHEET 7 /
THE CONTRACTOR SHALL INSTALL AND ADJUST SILT FENCE AS NECESSARY TO PREVENT SOIL FROM D
EXPANSION / / ENTERING STREAM. VDOT CL.AI RIPRAP (d5o o.8') SHALL BE PROVIDED WITHIN THE EXISTING \ \
O� / STREAM BED AT THE TRANSITION FROM THE EXISTING STREAMBED TO THE PROPOSED DIVERSIONZ Q Lu
/ (ADDITIONAL 3.44 ac.) / A
1 \ \
O\ CHANNEL, AND AT THE TRANSITION BACK FROM THE DIVERSION CHANNEL TO THE EXISTING I Z Lu (�
PROPOSED SAFETY FENCE, STREAMBED. AN APPROVED FLOW BARRIER (SANDBAGS, PLYWOOD, JERSEY BARRIER, OR ( \ \ 0
.� I \INSTALL SIGNS "WARNING AF I ' // /� / s EQUIVALENT) WILL BE INSTALLED BEHIND THE RIPRAP TRANSITION.
\O UICK SAND, KEEP OUT" / ' I / / // / / 3. THE DIVERSION CHANNEL CROSSING MUST BE OPERATIONAL BEFORE WORK IS PERFORMED IN THE
i h PROPO ED VDOT / / STREAM (CONSTRUCTION OF DIVERSION SHALL BE PERFORMED "IN THE DRY").
RR I ( \ w O
SOIL TYP
� / ` �V
STD. CL. Al // / / �4� UPON COMPLETION OF THE CULVERT CONSTRUCTION AND WITH COUNTY & VDOT INSPECTORS' I \ \ w
/ l / l l // / ry \ \ 39 I /IPRAP AT \/ / APPROVAL, THE CONTRACTOR SHALL REMOVE THE STREAM DIVERSION ALLOWING STREAM FLOW \ \ LLJ (n
\ \ \O \ / / \ \\ \�\\\ I TRANSITION // // \ // X / TO RESUME THROUGH THE CULVERT. / '/ \ \ ~
\ \ ti9 v �D EN P #1 TO BE UTILIZED FO�t / — �s \ \\ I I I / �. / / / \ 0
CONSTRUCTION ENTRANCE WASHOFF / RUNOFF / i/ / \ \ \\v� \ \\ / y / / / \ ���/// 5. CONTRACTOR MAY THEN INSTALL THE FILL MATERIAL OVER THE CULVERT. THE DOWNSTREAM / S \ \ \
RW I r / . \
\PRO OSED FLOW BARRIER (SANDBAGS, PLYWOOD, JERSEY BARRIERS OR EROSION CONTROL MEASURES SHALL BE INSTALLED PRIOR TO THE INSTALLATION OF THE FILL \ \ \ (n U w
/ MATERIAL INCLUDING THE WIRE SILT FENCE. THE CONTRACTOR SHALL INSTALL ENOUGH FILL \
$ Ln
\ \ / f O� I J ST7 \ \ �' / I EQUIVALENT). SEE SHEET 3 FOR ADDITIONAL STREAM CROSSING DETAILS. \ I
ROPOSED BAFFLE S�
r \ ' CONTRACTOR SHALL REMOVE PROPOSED FLOW BARRIER & STREAM \ MATERIAL OVER THE CULVERT PIPE TO SUPPORT THE WEIGHT THAT WILL BE ACTING UPON IT FROM \ w
' ' /\ , ss r TP I 1 DIVERSION ONLY AFTER THE CULVERT INSTALLATION HAS BEEN COMPLETED, - CONSTRUCTION TRAFFIC TO ACCESS THE AREAS ON THE NORTH SIDE OF THE CULVERT. ONCE THE / \ \ Q Lu
FILL MATERIAL HAS BEEN INSTALLED FOR A STREAM CROSSING WITH THE EARTH MOVING // \ w V)
DETAIL ON H / D BY VDOT AND THE, ESC INSPECTOR GRANTS APPROVAL.- \ I Q
'ACCEPTE, _ �
i EQUIPMENT, THE CONTRACTOR SHALL CONTINUE TO INSTALL THE REMAINING ESC CONSTRUCTION
6 / \ \ \ / �/ l/ / I I / SF /WIRE / / / / \ f MEASURES ON THE NORTH SIDE OF THE CULVERT, AS SHOWN ON THIS SHEET. / \ J =
\ � \\ \ Cf d
/ WORK IN TF�E STR�AM COVERED UNDER VIRG11� WATER PROTECTION (VWP) v / H
INDIVIDUAL PERMIT NUMBER i6-i133 FOR THE BROOKHILL PROJECT. / / / /Lu
5, C F / w/WIRE EXISTINGS�TRE%
J
/ \ VO / /d F
/ PHASE I DRAINAGE AREA TO
\ / / suPPORT LEGEND LEGEND
�. . - � I ✓ { � � / / � / T � \! �� Q
DRAINAGE DIVIDE TYP:)\ �c`� CRS \ ss � LIMITS OF DISTURBANCE APPROVED- - / / I / / / / \ �c
\ F �V WITH WP0202000004 - BROOKHILL ' / / / / / \ / \ /
P OPOSE`D CONTRACTOR \ / / //50SE`D/B'�DIVbRSI�i.
i/ '// / I / l l _PARKING &STAGING AREAiPR1ONTRAC�ORj / 'BLOCKS 9,y10, & 11 VSMP PLAN I I / I / GR�PHI� SCALE SAF SAFETY FENCE PER VESCH 3.01 LIMITS OF LAND DISTURBANCE 00
r� / SHALL ENSURE POSITIVE SLOPE IS / v I I l " " �" v e� ' ' CE CONSTRUCTION ENTRANCE PER VESCH 3.0z M�./�
I MAINTAINED. BERM SHALL BE STABILIZED e \ I I ( I - \ / O ��� DIVERSION DIKE N W
b / O� ASAFI T$TEP N, DISTURBANCE. \ / I I \ ssF SUPER SILT FENCE PER VESCH 3.06 -- BOUNDARY LINE
/ v PROPOSE CON RET f. / / II ' I I I / (IN F ET) / v \ v / O
\—ssF—ssF— SILT FENCE w
e \ I' / I INLET PROTECTION PER VESCH 3.07
/ \ WA H, UTtREA i �\� ���4. r I I I I 1 inch —/ 40 f . / O f DIRECTION OF FLOW
/ \Oy \ 5 "\ THE FUELING TANK SHALru
L BE COMPLETELYSURROUNbED BY A 'DEEP, 2' WIDE / I I I I I I - l / T /\\ / �\ \�\ 0D DIVERSION DIKE PER VESCH3.09 653.75 PROPOSED CONTOUR W
s EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE LINING, OR BE PLACED IN AN/IIII I I I / \ / — w RIGHT OF WAY DIVERSION PER VESCH 3.11 --------' DRAINAGE DIVIDE
IMPERVIOUS OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER SHALL % \ \ \ d
\ � CAPACITY IS L IN LARGER THAN THE MAXIMUM VOLUME H LL ENS RUE I I I I I I I / I / \\ \\ ST SEDIMENT TRAP PER VESCH 3.13 — — — SOILS LINE a
ti Fi I LOCATION'OF FUELING
�A!y EA CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME I I I I ' I / \ / \\ /' WATER WAY Joe No.
C / _ LOCATION OF 15C�UM PST R
OUTLET PROTECTION PER VESCH 3.18
J TREELINE 182150
TEMPORARY SEEDING PER VESCH 3.31P OPOSEDPAVECO\NSCT ON ENTRANCE SCALE
& a (12'00' MIN.) w/ WASH RACK & DOWN GRADIENT �EXISTING PRESER�D IPERMANENT SEEDING PER VESCH3.32 PRESERVED SLOPES
it SLOPES (TYP.)N SE I MANAGED SLOPES 1 =40'
SOIL STABILIZATION BLANKET PER VESCH 3.36 _TSWM FOREST &
L.0 TION F OPEN SPACE EASEMENT SHEET NO.
RTA-PO \ TREE PROTECTION TAPE PER VESCH 3.38
DUST CONTROL PER VESCH 3.39 4I
0
/
\_\ —458—
1452
/ m� /
//
0
1�'g"�
�/
/
EXISTING STREAM-
/
PROPOSED OU FALL, SEE
/ //Aa0// / /i/° �i ' / ' / ' / ' / / ( (� ` 'S'� % •tom
'.A SWM SHEETS FOR DETAILS
PROPOSED VD OT STD. EC-1, CLASS AI RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC
M 4
6 / 9
(L=19* W1=10', W2=19', D=18"). STONE TO BE INSTALLED FLAT & TO EXTEND TO OP
BANK. FILTER FABRIC SHALL BE KEYED INTO THE EXISTING GROUND AT A MINIMUM
XISTING MANAGEDE END & ALONG THE PERIMETER. EDGES OF F �BRIC SHALL OVE P MIN. OF 9
1
THECOF9NATT\�
/\ / .
� STEEP SLOPES (NP.) —W TIH WP02D02000004 ISTURBAN�BROOKOHILLD-'��1 /
00,
PROPOSED LIMITS OF dI 061/ / / / / /It
EXPANSION (ADDITIONAL 3.44 ac.)
1 PROPOSED -IMIiS / %/ /� / /� / / / I �/ /
/ OF TREE CLEARING // / / / / \ PROPOSED SAFETY FENCE,
l 1 \ ANSTALL SIGNS "WARNING
Tr / / ' / / QUICKSAND, KEEP OUT"
SAF
/ / I OPOSED BAFFLE, SI
D�TAIL ON SHE7 7
RT I /
r
VYY11
NC `\— '
TPSSF
ROPOSED VDOT STD. EC-1 TYPE B INSTALLATION RIPP LNIEDUPTREAM\;
\ 1�i► a DD \
ENERGY DISSIPATER WITH FILTER FABRIC UNDERLAYMENT. FILTER FABRIC s\ M 1 \ \ s \
TO BE KEYED INTO THE EXISTING GROUND A MINIMUM OF 9 AT THE ENDS sa\ DR, GE DIVIDE (TIr.) � � � � \ �
AND ALONG THE PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A
MINIMUM OF 12". ENERGY DISSIPATER DIMENSIONS: 35' LONG, 10WIDE AT
THE CULVERT AND j W�E ATJHF EyD. ST HICKNESS=18'yV�A A�i
/�� \ T �y s \ RSA— —N --
/' PHASE II DRAINAGE AREA TO
SEDIMENT TRAP #2 = 1.16 ACRE
OF��
1 I
\\ �\ \ \ V\ \I \ I I I rLic.
0
�RLIN:
91. 03573/23
�ssIOA
%�+41111
/� \ IP
*41/v
Toozw
toI �\ \ V �� A V AV 1 1AI \ Q o
r; a
r 1 \\ U
}- z \ / \\ �I\�\VA1 \ U
L�� I 1• \ V —\ 1A z
// p a
DRAINAGEDIVIDE(TYP.)
u'
Ui
0'PROPOSED LIMITS OF / / SF
/ >
DISTURBANCE / a
/ EXPANSION I \ I I I II
d / w I 1 W
/ / / / �RO O ED 18 DIVER ON. CONTRACTOR AL 3.44 ac.
SAILL ENSURE NTAINTIVE SLOPE IS
ED.BERMIS ALLBEESTABILIZED
145 A;WST STEP IN DISTURBANCE. / V
PROPOSED I
STOCKPILE
SURRO
NDED
a6 BY SILT FENCE \ I�
Sse
N f+f
/ \ � O �II 0
a M
s/ / / \ r M
PHASE II DRAINAGE AREA TO / / / / \ CONT CTOTNSTAL� A °O
SEDIMENT TRAP #3 = 1.43 ACRES / / / 6 \ SIGN READING 'NO
/ / \ CONSTRUCTION TRAFFIC TO
ENTER/EXIT ASHWOOD BLVD.',
/ I
IORT I I 111 0) Q
P �I I DISTURBANCE
0ED LIMITS OF
ANCE EXPANSION 0-
0-
DD — — — — / I I (ADDITIONAL 3.44 ac.) �
PROPOSED LIMITS
TREE
f / / SWM E/�CILITY APPROVED WITF� \\ �� OF EE CLEARING
/ o/ �' / �. f I, ,�„` � � -� �/ WIRE- � / i �� �
// �o / �k6 i / I A A _ S V I z
— SF / / PROPOSED 18 DIVERSION. CONTRACTOR \ \ I ��
WPO202000004 BROOKHILL e I /, — SUPPO ' s — — N
\ / /] SHALL ENSURE POSITIVE SLOPE IS o I I
BLOCKS 9, 10, & 11 VSMP PLAN'" h M �� \ Z AINTAINED. BERM SHALL BE STABILIZED— I I A I N d
h
�I
SAS A FIRST STEP IN gISTURBANCE. Q 0 J
RAINAGE
P� DIVIDE TYIP�,EXISTING/ S �EAM
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INSTALL SIGNS "' AR
X % QUICKSAND, KEEP OUT�G/ /
°',/yes % // _.� ii � V
ti \\A \�� \ \ / / / �' �/ ' �� �SEDIMENTTRAP #L SHALL REMAIN FUN AS LONG AS / / / / / / \ \ \ \ Lu
5 w WiR� �
r POSSIBLE, AS DESIGNED & SHOWN. SEDIMENT TRAP #2 SHALL
// \ \ \ �/ ui z
61 / / 4sa °( �A ' / _ = /BE REMOVED UNTIL THE UPLAND STORM SEWER IS / /
W/ // V A \ / / / �- �� �� PROPOSED BAFFLE, S E / �/ i I \ F- W
PROPO E IMITS OF INSTALLED AND IS OPERATIONAL. SEDIMENT TRAP #2 SHALL NOT
\ \ \ / / DISTURBANCE ' F,TAIL ON SHEET 7 --BE REMOVED NTIL THE ESC NSPECTO APPROV S ITS REMOVAL. / ° / �\ \ \
;EXPANSION
O� \VA ' SF.,(ADDITIONAL 3.44 ac.) // s / / / /// X / 1� \ \
�44a / / %� RS s =w/WIRE X' - , / / / / / / �// / � / �i
/ / v ' PROPOSED SAFETY FENCE, SUPPORT X
%/ / � ^ I INSTALL SIGNS "WARNING SAF � � � P OU/ / � \ / \ I
KEET" I ( I / / // / / I _\
\ \\ °\ 3 /�/����1 \s VAS\ OP �i
/ I EN P 1 TO BE UTILIZED FOR / rF s \ \ S PR POSED FLAT VDOT S ANDAhD EC 1, TYPE NSTALLA ION RI RAP OUTLET PROTI N, ITH FILTER ABRIC
/ CONSTRUCTION ENTRANCE WASHOFF /RUNOFF \ UNDERLAYMENT. FILTER FABRIC TO BE KEYED INTO THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS AND
/i i/ \ R \ / A
I \ � ALONG THE PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A MINIMUM OF 12 . ENERGY DISSIPATER
SHALL BE A MINIMUM OF 30' LONG WITH TONE THICKNESS OF 18".
� � ,r � :. •' - � PROPOSED BAFFLE, SE � i � � r� � TP \ i J l � � � � � % /� � � �> / \ � J / V A
\ \ DETAIL O SHEET \ 1 I PR SED 18" DIVERSION.CONTRACTOR /
s e SHALL ENSURE POSITIVE SLOPE IS
AINTAINED. BERM SHALL BE STABILIZED
RS ST P IN.IDIST _RBANCE
SUPP WI RT
e w/ WIR-E �XISTING STREA
% PHASE II DRAINAGE AREA TO �/ / F /� ,
SEDIMENT TRAP #1 = 0.48 ACRES // d/ SUPPORT 01 • �; 4 q/� � ''jj I I I /
/ r LIMITS OF DISTURBANCE APP�20VE / / / / / / / / LEGEND LEGEND
is ' ' �• / � � � � DRAINAGE DIVIDE TYP.)� �� CRS \ s � / /
CONTRACT R 55` ' WITH WP0202000004 - BROOKHILL
PARKING & STAGING AREA �' I �; $LOCKS 9, 10, & 11 VSMP PLAN �� / / / / / // / / / �/ �^ SA SAFETY FENCE PER VESCH 3.01 LIMITS OF LAND DISTURBANCE
�\ / S� '' s ` D/� / / I / / / / � \ �� 40 4 F DIVERSION DIKE
PROPOSED 18" �VERSION.4CONTRACTOR � � � / / / / _ O
CE CONSTRUCTION ENTRANCE PER VESCH 3.02
/ \ / SHALL ENSURE POSITIVE SLOPE IS y I / / ] \ SSF SUPER SILT FENCE PER VESCH3.05 � BOUNDARYLINE
MAINTAINED. BERM SHALL BE STABILIZED / I \ O
/ V \ PROPOSE6 CO BETE /� I I
� � / AS A FIRST STEP IN DISTURBANCE. � I I / I I I � � / / / / / \�� / / \ \ � / O—ssF—ssF— SILT FENCE
IP INLET PROTECTION PER VESCH 3.07
/ WA H UT REA i � I / f DIRECTION OF FLOW
�O o rtHE FUELING TANK SHALL BE COMPLETELYSURROUNDED BY A 2' �EEP, 2' W D � I I I � � � I I � � � / / � / ��� / � ��V � DD DIVERSION DIKE PER VESCH3.09 653.75 PROPOSED CONTOUR
s/ %\EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE LINING, OR BE PLACED IN AN I I I I I I I / / / — i Rw RIGHT OF WAY DIVERSION PER VESCH 3.11 -------__ DRAINAGE DIVIDE
�O� �/ / �t� \ i IMPERVIOUS OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER SHALL I I I / — • — — SOILS LINE
LOCATIOIVU� FUELING A EA \CONTAIN FUEL IN THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUME I I I I I I I I / I / / \ \ \ /' ST SEDIMENT VESCH WATER WAY
/ 0 1 \ \ ��- 1 CAPACITY IS 10% LARGER THAN THE MAXIMUM VOLUME OF STORED FU L I / G1�AI�HIC C �E / �� / � � / OP OUTLET PROTECTION PER VESCH3.18
OC / LOCATIS�V 0�15cy UMPSTER \ \ \ \
V I I l TREELINE
PROPOSED PAVE1 CONS CTION EVTRAN E 1 o 80 TEMPORARY SEEDING PER VESCH 3.31
� / ' (12'00' MIN.) w/ WASH RACK & DOWN GRADIENT \ EXISTING PRESERVED I / / \ pg PERMANENT SEEDING PER VESCH 3.32 PRESERVED SLOPES
V° 3 �' IVERSION SEDIMENT TRl� P NG DEVICE V 1 \ V��� STEEP SLOPES (TYP.) / MANAGED SLOPES
41 A V � \ V� \ \ _ _ _ SWIM FOREST &
C i.« :.O ATION OF \ \\ \\\\ \ 1 \\\ II I I I (I IN EETi I I / / I BM SOIL STABILIZATION BLANKET PER VESCH 3.36 _— -----J
° P RTA POTTIES HOC \ r �\ I ` \ 1 1 \ \\ \ \ \ �I I I I 1 inch = 4Q ft.l / OTREE PROTECTION TAPE PER
ti s ' Am \ \ \\ \ \ \ \ 1 I I 1 \ \ \ \ \ \ I 1 I I / / J / Dc DUST CONTROL PER VESCH 3.39 CH 3.38 OPEN SPACE EASEMENT
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JOB NO.
182150
SCALE
1 "=40'
SHEET NO.
5
CUT/FILL ANALYSIS:
THE PROPOSED PLAN, AS SHOWN, REQUIRES ROUGHLY 9,600 CY OF
CUT AND 38,000 CY OF FILL. THESE NUMBERS DO NOT ACCOUNT
FOR LOSSES, WHICH ARE SUBJECT TO CHANGE WITH COMPACTION.
/
/mow
/
lol-
EXISTING STREAM
1-0 r PROPOSED b, SEE /
SWM SHEETS FOR OR DEDETAILS
�4� / / / / I / i ✓iPOS \ / 4
/ PRO\ED VDOT STD EC 1, CLASS AI RIPRAP LINED OUTLET PROTECTION WITH FILTER FABRIC
UNDERLAYMENT (L=19't, W1=10', W1=19', D=18"). STONE TO BE INSTALLED FLAT & TO EXTEND TO QP I'
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 FARRIC SHALL OVE P P1IIN. OF 9
/i
a /
/ /STEEPS 0 ES (TYPO \ LIMITS OF DISTURBANCAPPROVED
/ / / \ )\\ WITH WP0202000004 - BROOKHILL
�!asaTH 0�'
I1
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IscoTT R. LLINs_z
Lic. No. 035791
\ \ \ \ I 0�0 3/3/23 �4
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PROPOSED LIMfT OF dI UR� CE/ / / % J ��ROPOSED LIMITS OF /
5 AN f / / � � DISTURBANCE /
I I I
EXPANSION (ADDITIONAL 3.44 ac.) / r / / / / / / % �� 4 EXPANSION / / w ui
/ / / / / ' / / / // / / / / / //CON�R C�OR SHALL ENSURE
(ADDITIONAL 3.44 ac.
I PROPOSED LIMITS k / J / li
OF TREE CLEARING �/ / / PROPOSED SAFETY FENCE, / POSITIVE SLOPE IS MAINTAINED.
/ J / / / \ /INSTALL SIGNS "WARNING / / /BERM SHALL BE STABILIZED AS A
�IRST TEP IN DISTUIRBANCE.
T� QUICK SAND, KEEP OUT" //// /� If
SAF / /�4��lfi�#4
PROPOSED BAFFLE, SEE / 5
DETAIL ON SHEET Z // N-/ ✓ \ -� i
IN
M I I I I o
D / \ CONT ACTOR TO INSTALL A 00 m
DWACF TT nDATAIArF ADFA Tr) IQ .i .- - ... .... .- I.-
SUPP ' I r g / »
TP pTI / % �IRE
ORTI \ • a D ��/
'PROPOSED VDOT STD. EC-1, TYPE B INSTALLATION RIP P LINED UPSTREAM /� J ? 'Jsu P
ENERGY DISSIPATER, WITH FILTER FABRIC UNDERLAYMENT. FILTER FABRIC
/ - - --
/ TO BE KEYED INTO THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS
AND ALONG THE PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A \ / s / �j — S 7 /' I I 11
I I N II II I I I I
MINIMUM OF 12". ENERGY DISSIPATER DIMENSIONS: 35' LONG, 10' WIDE AT s\ \ s — / / I I I C7
5'
THE CULVERT AND 6' WPE AT THE EJN D,ST Nf THICKNESS =18 \ J� a1 M — — f
� s �_� — � �"� TP / SF w/�IR)= / I I � � I I � I, � I � I I � � Q
/ / o SUP bRT
PROPO�ED LIMITS OF N
D � � g, \ � > IP — _ _ — — / / / -- �% ��. / / / / ^ I I DISTURBANCE EXPANSION II
///�6 i / _ / I ADDITIONAL 3.44 ac.) ® M
----
/ , \ \ \\ PRF/000 TROC ES
EECDiLEIAMRIITNS f /�/ /
/ SWITH,
/WIRE
I 1\ II Il Ii I
Z
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//P0200004 - BROOKHILL
UPPORTOCKS 9, 10, & 11 VSMP PANJ > O
IN AM � � � � -- � I I I � �
F
/, / / \ I � I —
1/ _ -�'�/ / /�� I I I I � Lu Z �
A/ l �'- /� / TP i� _� �/ % �/ / I \ 1 \ 1 U
ROPOSE6 L VECSPREADER, FILTEkSTRIP & UPLAND STORM \ / / / \ \ X �.
SEWER SHALL BE INSTALLED IN ESC PHASE III. FILTER STRIP SHALL / / / / I \ I Lu
� BE STABILIZED WITH PERMANENT SEEDING. THE STORM SEWER / � � I \ I \ � I" I" ILu
PROPOSES IMITS / IMMEDIATELY UPLAND OF THE LEVEL SPREADER SHALL NOT BE L9O w
/ \
DISTURBANCE ACTIVATED UNTIL THE SWM RISER IS ACTIVATED, WHICH SHALL VI r P ° / 1 \ -- W
EXPANSION / ONLY OCCUR AFTER COMPLETE STABILIZATION OF THE SITE, THE / Z) M
/ / / // / / • \ /i \ /STABILIZATION OF THE LEVEL SPREADER, THE CONVERSION OF ST / � \ \ LL
\SF �.�ADDITIONA_L 3.44 ac.)� /�
w/ WIRE / / / �#3 T9 A PERMANENT SWM FACILITYQ INSP CTO APPR VAL. / / I \ V Q O
/ O
f /Lu
ti I / i / �' / SUPPORT � / / // ���/// // �/ i � � v / / i x U 0
PROPOS D FLA VDOT STANDARD EC 1, TYPE B INSTALLATION kIPRAP O_UTL I
\p PROTECTION w/ GEOTEXTILE FILTER FABRIC UNDERLAYMENT. FABRIC TO BE \ / / I \ \ Q z
OP KEYED INTO EX. GROUND 9" MIN. AT ENDS & ALONG PERIMETER. FABRIC TO I / ' \ \ \ \ Y O
OVERLAP A MIN. OF 9" �L=10', W1=6', W2=10', D=18" MIN.) _ _ I / A /
��\ �� / A\Lu
Lu O
O -
� PR POSED FLAT �%D T STANDARD EC 3 TYPE B INSTAL RIPRAP OUTLET PR TECTION ITH FILTER A�RIC
s
UNDERLAYMENT. FILTER FABRIC TO BE KEYED INTO THE EXISTING GROUND A MINIMUM OF 9" AT THE ENDS AND / / / S I �
l /A v A V v A/ W
ALONG THE PERIMETER, AND THE STRIPS OF FABRIC SHALL OVERLAP A MINIMUM OF 12". ENERGY DISSIPATER ' / \ (n
SHALL BE A MINIMUM OF 30' LONG WITH A�STONE THICKNESS OF 18". v J / / / \ \ U F__4
Q
1-Z Lu Lu
ro
Z I
Lu 2
�p0 //�/ PS /�/d FSU SUPPORT �. EXISTINGSTREA
/r ..�I ,°
/ \• \ \ k5 / Fs LIMITS OF DISTURBANCE APPRO
/ J / / / LEGEND LEGEND O
'WITH WP0202000004 - BROOKHILL �/ / / J V _
BLOCKS 9, 10, & 11 VSMP PLAN � � l /l / l / /l J / / /\� � \ /f/ / / � SAF SAFETY FENCE PER VESCH 3.01 LIMITS OF LAND DISTURBANCE OO
'/ • / / ;� / / ' / / I CONSTRUCTION ENTRANCE PER VESCH 3.02 DIVERSION DIKE N
— — BOUNDARY LINE
SUPER SILT FENCE PER VESCH 3.05
�p \ •. //\ \ I I %. +pp//T ^/ / / \ \ \ / —SSF SSF— SILT FENCE W
/ / / \ ' ` �• / I +P ,� G ICAP R IC / S C r�LE / / \ \ / \ IP INLET PROTECTION PER VESCH 3.07
\ , I I I / f DIRECTION OF FLOW
THE F- EL NG TA�VI� SHALL BE COM LE ELYSURfEOUNDED BY A 2' DEEP, 2' WIDE I I I I / / / v �D DIVERSION VESCH —653.75— PROPOSED CONTOUR
/ p O \ \ 40 o ao 4 8 \ / \ \ W F
% \� EARTHEN BERM WITH A HEAVY MIL POLYETHYLENE LINING, OR BE PLACED IN AN/ I I \ \ _ _ _ _ _ _ _ _ _ w
/ I / W RIGHT OF WAY DIVERSION PER VESCH 3.11 DRAINAGE DIVIDE O
p� IMPERVIOUS OPEN -TOP DUMPSTER. THE PROPOSED BERM OR DUMPSTER SHALL / I / \ \ \ aLn
LOZATIO\ 0)�FU FUELING AREA \COPNTCIN IUEL IN LA GVENTO THE MAXIMUM VOLUME H STORE FE E I I I I I I ( IN/FEED) / \\ \\ sT SEDIMENT TRAP PER VESCH 3.13 — — — SOILS LINE
THE EVENT OF A SPILL. CONTRACTOR SHALL ENSURE VOLUM JOB No.
\ / LOCATION 0�15C \\ UMPST R \ \\ \� I I / / / \\ / O � TREELINEWATER AY 182150
CAPACITY p 1 / I 1 inch = 40 ft. /�' / \ OP OUTLET PROTECTION PER VESCH 3.18
I A � �
/q V\ TEMPORARY SEEDING PER VESCH 3.31
\ / CE PRO�SED PAVED CONS�R CTI16N \ \ \ \ \ 'EXISTING PRESERV�D I I / \ \ PRESERVED SLOPES SCALE
Vp ) / ENTRANCE(12WO'MIN.) A \ \\\ A \ \ STEEPSLOPES(TYP.) I I / ( \ \ Ps PERMANENT SEEDING PER VESCH 3.32 MANAGED SLOPES
y3 \ V .. V I ) \ \ 1 1 \ \ VA \ v I I I I / / I 1 "=40'
u
O ATION OF / \ \ \ \ \ \ \\ \ I I I \ BM SOIL STABILIZATION BLANKET PER VESCH 3.36 y, \ \ 1 ` \ \ ,I SWM FOREST &
p \ \ p"� \ ; \ \� I \ \ \ \ \\\ \ \ I I \ I I I I / / \ _ TREE PROTECTION TAPE PER VESCH 3.38 — — ` OPEN SPACE EASEMENT SHEET NO.
P RTA-POTTI S �, X�\ \ I I I I I �\ O
A\ \\ V I I I I I I V A 1 V A\ V S I / DUST CONTROL PER VESCH 3.39 6
/ I I
SEDIMENT TRAP #1 DETAIL
SCALE 1 "=20'
' I
/ / I
446- / / \
/ 'o,
/ X
9
1 � PR OSED 2.9'x20" I
RAP LINED SPILLWAY
BO OM ELEvV -4�44.OrO
V \TOP LEV.- �DD \
\ \ \
k$t
\ o
V
\ PP OPO! BAFFLE,
SEE=vDETAIL ON
p THIS SHEET \
VA V A
\ kkG
/ tYl*
1-:(Q
PROPOSED SAFETY FENCE,
/ INSTALL SIGNS "WARNING 4f 5F
UICK SAND, KEEP OUT",
5ye
Sediment Trap #1 Design
drainage area (acres) (<3) 0.48
trap volumes:
elevation (ft) area (so volume(cf) volume(cy)
443 898 0 0.0
444 1174 1,033 38.3
446 1817 4,001 1482
1• vARwelE'
CREST OF STONE MEINORIGINAL
GROUND
1
CLEV.
DRY STORAGE
WET STORAGE
(EXCAVATED)
wet storage:
SEE PATE 31}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)
322
bottom trap dimensions:
crest of stone weir
445.0
top of dam elevation (ft)
dry storage provided at this elevation (cy)
49.0
top width of dam (ft)
slope of dry storage sides
2:1
top trap dimensions
SEDIMENT TRAP BAFFLE DETAIL
NO SCALE
OF 4'x8'xl' THICK EXTERIOR
BAFFLE NOTES:
D (OR EOUIVALEq ^6'
1. BAFFLES SHALL EXTEND FROM THE TRAP's GROUND
TO 6' ABOVE THE SPILLWAY CREST.
SPILLWAY CREST
2. IN ACCORDANCE WITH BAFFLE NOTE 11, THE
ELEVATION
FOLLOWING ELEVATIONS SHOULD BE USED FOR THE
4' I
I
0x8bOICK PLYWOOD BOARDS:
POSTS MIN. SIZE 4'
ST /2 TOP ELEV=421.5'; BOTTOM ELEV. 417N
SQUARE OR 5' ROUND.
ST P. TOP ELEV=445.5'; BOTTOM ELEV.=441.5'
SET AT LEAST 3'INTO
3. IN ACCORDANCE WITH BAFFLE NOTE 11, THE
8.
THE GROUNDFOLLOWING
ELEVATIONS SHOULD BE USED FOR
SEDIMENT TRAP B (NOTE, THE PLYWOOD BOARDS
SHALL BE CUT IN HALF, RESULTING IN BOARDS
2THx8'Lx}'THICK):
ST #I: TOP ELEV=445.5'; BOTTOM ELEV. 443.5'
4. BAFFLES SHALL BE BURIED AND TURNED INTO THE
TRAPS' EMBANKMENTS 'WHERE THEY TERMINATE AT
THE SPILLWAY, AS SHOWN.
1992
vAR1AaLi
4L .
FLIER CLOTH ORWNO
cR GM
ELEV
COARSE AGGREGAME CUSS I RIPRAP
2.9
443
20'x49'
446
4
32 x61'
SEDIMENT TRAP #2 DETAIL \
SCALE I"=20' \
S \s \
PS
S \
PROPOSED BAFFLE, SEE
DETAIL ON THIS SHEET
ss \
\PROPOSED 12.4'x43
\RIPRAP LINED SPILLWAY
`BOTTOM ELEV.=419.25, \
TOP ELEV.=421. 0
\ sf \
\
\ PROPOSED SAFETY -FENCE
\ \ \ \4 \ INSTALL SIGNS "WARNIN
\ QUICK SAND; KEEP Ol
\ - - - 440--
-
\ 4j)\4a -
43o-
�48\ ryv yy
\
/ay5
\ \may
42z
424 --' /
STREAM
LIMITS, TYP.
\ 55 ISSF� .Lj �
\\ SSF�-�SSF-/SSF
Sediment Trap #2 Design
drainage area (acres) (<3) 2.06
trap volumes:
ORIGINAL
elevation (ft) area (so volume(cf) volume(cy) GROUND
ELEV.
417 1344 0 0.0
418 1664 1,501 55.6
420 2400 5,543 205.3
422 3264 11.185 414.2
VARR$E
CREST OF STONE WEIRawua F' I
DRY STORAGE
WET STORAGE
(EXDAVATED>
wet storage:
,SEE PLATE 3.13-1
wet storage required (cy) (67*13A)
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*DA)
138.0
bottom trap dimensions:
crest of stone weir
421.0
top of dam elevation (ft)
dry storage provided at this elevation (cy)
157.5
top width of dam (ft)
slope of dry storage sides
2:1
top trap dimensions
3.18
PIPE OUTLET CONDITIONS
A A,
'IPE OUTLET TO FLAT
J(EA WITH NO DEFINED
:HANNEL
I La \
d
SECTION A -A FILTER CLOTH KEY IN W-9"; RECOMMENDED FOR ENTIRE PERIMETER
(MIN.)
PIPE OUTLET TO WELL
DEFINED CHANNEL
PLAN VIEW
L a
0 R --•
d
SECTION A -A
FILTER CLOTH KEY IN 6"-9'; RECOMMENDED FOR ENTIRE PERIMETER
NOTES: 1. APRON LINING MAY BE RIPRAP GROUTED RIPRAP GABION
BASKET, OR CONCRETE.
2. Le 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 INCHES.
Source: Va. DSWC Plate 3.18-1
1992
YARPIlE
V MAIL.
FLIER CLOTH pEGNAI
GROUND
CLEV.
COARSE AOGREGATE" CUSS I RPRAP
12.4
417
28'I(48'
422
4'
48'T(68'
SILT FENCE CULVERT INLET
PROTECTION
`DISTANCE IS 6' MINIMUM IF FLOW
IS TOWARD EMBANKMENT
FLOW
OPTIONAL STONE COMBINATION
FLOW
•"VDOT 13, #357 OR /5
TO REPLACE SILT FENCE
HIGH VELOCITY OF FLOW IS EXPECTED
Source: Adapted from VDOT Standard
Sheets and Va. DSWC
I RIPRAP
Plate 3.08-1
11 I' / OTEICON/TRAChOR TO INSfA 10 FACILITY RISER,
SEDIMENT TRAP #3 DETAIL � / it
SCALE 1 "=20' / BA REL, AND OUTFACE PCCCT2 N. ALL ORIFICES
/ SH�LL REMAIN PLUGGED TINT TO iSEDIMENT TRAP IS /
CONVERTED TO A RMl NENT SW
FACILITYI \
�I / PROPOSEDVDOT STD/EC-1, CLASS Al RIPRAP LINED OUTL r\ / \
PROTECTION WITH FILTER'FABRIC UNDERLAYM(NT (L=19'4, L; 10',I +� \ TO PREVENT FLOTATION THE RISER BASE /
W2=19'11D=186). STONE TO BE INSTALLED FLAT & TO EXTEND 70 + \� -SHALL BE FIRMLY EMBEDDED 6" INTO ANA8"
STREAM THE CHANNEL's BANK. FILTER/FABRIC SHALL BE KEYED INTO THE \ k THICK REINFORCED CONCRETE FOUNDATIO
/ NG GROUND AT A' MIN MUMIOF 9" AT THE END & ALONG THE \ � LIMITS, TYP. EXISTING w�\�I T IS 8'x8', ANO`BU$IED BELOW GROUND.
' PERIMETER. EDGES OF, SMALL OVERLAP A,MIN./OF 9
/ �y / f
PROPOSED VOOT STD. E`w 1 / / / 1 I ��Vt\
PROPOSED 24" HOPE BARREL,/
INV. IN=430.00, INV. QUT=420.00
104.74', IS=9.55%
Cn
ss I '0I I PROPOSllED 8.6'x36' I [ \ \ \
RIPRAP LINED SPILLWAY \-OPOSSEP SAFETY FENCE,
6 OTTdM ELE /.=443t00, N \
INSTALL SIGNS ".WARNING
v /TOP ELEV.=445 00 \ QUICK SAND, KEEP OUT"
ROPOSED 4 "RCP RISER
R PROPOSED BAFFLE, SEE \ vv A \ \ V A A
ff�= 43.50 DETAIL v v v ON THIS SHEETv v
GRAPHIC SCALE
10 D 1D 30 40
( IN FEET )
1 inch = 20 ft.
Sediment Trap #3 Design
drainage area (acres)(<3)
1.47
trap volumes:
elevation (fo
area (sf) volume(cf)
volume(cy)
438
399
0
0.0
440
783
1,161
43.0
442
1293
3,215
119.1
444
1926
6,413
237.5
446
2666
10,985
406.9
1' I VARIABLE
ORIGINAL CREST OF STONE WE\ ygyE,,6�
GROUND
ELEV
DRY STORAGE
WET STORAGE
(EXCAVATED)
wet storage:
SEE HATE ,,,,_,
wet storage required (cy) (67*DA)
98.5
bottom of stone weir (ft)
442.00
wet storage provided at this elevation (cy)
119.1
slope of wet storage sides
2:1
weir length (ft) (6xDA)
dry storage:
bottom of trap elevation (ft)
dry storage required (cy) (67*DA)
98.5
bottom trap dimensions:
crest of stone weir
445.0
top of dam elevation (ft)
dry storage provided at this elevation (cy)
2031.
top width of dam (ft)
slope of dry storage sides
2-1
top trap dimensions
1992 3.07
GRAVEL CURB INLET SEDIMENT
FILTER
�J
/ r
GRAVEL FILTER * 12"
RUNOFF WATER WIRE MESH
FILTERED WATER
d
d
O 4
SEDIMENT �I I III o AI
�„HIIHI�� a
1(I(Ij,RIr
CONCRETE 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 LIK LY TO E 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
Mix. ` 1
\FILTER CLOTH ddGINO
GROUND
ELN
COARSE AGGREGATE CLASS I RPRAP
8.8
438
23)(W
446
10,
64'x59'
44
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182150
SCALE
1"=20'
SHEET NO.
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°T THE LOCATION OF THE APPROVED BLKS 9-11 BERM & SWALE / / N
LLB
THAT DIRECTS RUNOFF INTO THE WET POND. APPROVED C
o \ 1 I \ / I•<'' BLKS 9 11 WET POND WAS DESIGNED TO HANDLE TIS H µ C
V 1 _ iLor I I PORTION OF ARCHER AVENUE, AS EVIDENCED IN THEV / Lj
`I _ %APPROVED BERM &SWALE SHOWN ON THIS SHEET
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SUB ��g0008)— — Pre Development Impervious Area Summary
// � � � � � // az i 4� "-s � � �� �������� �'���%�'� :.�•�� � � ��I � 5_ \ \ —_ � � Subarea46
PLAT
Existing Roadway 4,825 sf
. \ Overall Acreage Summary O
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,� _� /'/ / LOT � � i // // � � � � � / � • , � � I � o� �
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Pre -Development
Post -Development
Area, ac.
Area, ac.
DA 4A
0.70
0.70
DA 4B
1.36
1.36
/ L
79 i / — a 2.06 2.06
/ — — — — _ — — _ J I III WATERSHED SUMMARY FOR SUBAREA 4A
1 L78T % L6,/ //////// / = —= J / — — — — — Area, 1-year Flow, 2-year Flow, 10-Year Flow,
LOT �/�/ / / / / / — — CN ac. cfs cfs cfs
n iT/ _
Lbz GRA � C AI �� / / / � � � / � � � / / , � ��� / I DA 4A (Pre-Dev.) 56 0.70 0.12 0.24 1.29
30 60 iz� / / / / / / WATERSHED SUMMARY FOR SUBAREA 46
_ Area, 1-year Flow, 2-year Flow, 10-year Flow,
✓ `� LOT
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182150
SCALE
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SHEET NO.
8
STORMWATER MANAGEMENT NARRATIVE: f _
OVERVIEW ELi
THIS PROJECT IS FOR THE EXTENSION OF ARCHER AVENUE AND IS PART OF THE BROOKHILLDEVELOPMENT. STORMWATER TREATMENT IS PROVIDED TO MITIGATE THE IMPACTS FROM THEPROPOSED IMPROVEMENTS AND THE PLANS COMPLY WITH PART IIB REQUIREMENTS. PLEASESEE THE ACCOMPANYING STORMWATER MANAGEMENT CALCULATIONS PACKET FOR `ADDITIONAL DETAILS. _ —°'�- �\\\\� — \ SCOTT R. LLINS�\ �L) Lic. No. 035791,aWATER QUALITY SUMMARY \ — — — !�\ / 1THIS DEVELOPMENT REQUIRES THE REMOVAL OF 1.82 Ibs/yr OF PHOSPHOROUS. THIS P _—_;o-- ~ —° e —° �'8—� —�` -r —3i \ �� �� '4,� 3/3/23
REMOVAL RATE IS BASED ON THE DEQ VRRM SPREADSHEET. THE PHOSPHOROUS REMOVAL —tea '� _ �f''y{°SS �Gl z
RATE COMPLIANCE IS MET THROUGH TWO BEST MANAGEMENT PRACTICES. A LEVEL SPREADER
°`�- / /
OUTFALLING INTO A VEGETATED FILTER STRIP WITH TYPE B SOILS TREATS SUBAREA 4B. _ �L Asa_ ���� L L " L TONAL F, Cr
AFTER THE IMPLEMENTATION OF THIS BMP, A NUTRIENT CREDIT PURCHASE OF 1.00 Ibs/yr OF EXISTING - ---°9 — _" _ --� z_
PHOSPHOROUS HAS BEEN PROVIDED TO MEET THE REMAINDER OF THE WATER QUALITY — — — — — — — ROUTE 29 --0 ~ ° e�=L---- --
�c��
REQUIREMENTS.
_ n
WATER QUANTITY SUMMARY
THE PROPOSED ROAD EXTENSION CREATES TWO (2) CONCENTRATED OUTFALLS, WHICH ARE
SHOWN AND LABELED ON THIS SHEET AS POINTS OF ANALYSIS #1 & #2. THE TWO (2) POINTS \ �" !� ��
OF ANALYSIS WERE USED IN THE CHANNEL AND FLOOD PROTECTION ANALYSES. \— _EXISTING
— — — — — — — — _ ROUTE 29 � — — � — — .7L — — ...► — — o
POINT OF ANALYSIS #1 IS DOWNSTREAM FROM SUBAREA 4A AND THE PROPOSED CULVERT �L /
CROSSING. POST -DEVELOPMENT RUNOFF IS CONVEYED TO A RIPRAP LINED OUTLETMORTHBQQND �— �► _� — y _= W S m
PROTECTION LOCATED IN THE STREAM'S BED VIA NEW CONCRETE -LINED STORM SEWER. THE
2-YEAR DESIGN STORM IS NOT EROSIVE ON THE CONCRETE LINED PIPE AND RIPRAP OUTLET�—
PROTECTION, AND THE 10-YEAR DESIGN STORM HYDRAULIC GRADE LINES ARE CONTAINED-
- �ztr� M' M' M ~
WITHIN THE SYSTEM, AS SHOWN ON THE ROAD PLAN's SHEET 10. CHANNEL PROTECTION —"°— —
COMPLIANCE IS THEREFORE MET FOR POINT OF ANALYSIS #1 (SUBAREA 4A) VIA 9 VAC Z 3
25-870-66, SUBSECTION B.I.a (2-YR PEAK FLOW IS NOT EROSIVE IN MANMADE PIPES AND I / . >u_ M�---- W N
RIPRAP). THE LIMITS OF ANALYSIS FOR THE CHANNEL PROTECTION TERMINATES AT POINT OF l I I - - Z J
ANALYSIS #1, THE STREAM'S RIPRAP LINED BED, SINCE THE STREAM s DRAINAGE AREA IS 100 \ 1 \ \ \ �. / / / ./- " / / / •. I �. —j�j _ `+1'y F - - O o
TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF SUBAREA 4A. THE STREAM'S \ \ �� / / �/ / a V
DRAINAGE AREA IS 79.20 ac., AS SHOWN ON THE ROAD PLAN's SHEET 11, AND SUBAREA 4A's
DRAINAGE AREA IS AC ac. THIS SUBSECTION IS .2.a ( FLOOD PROTECTION IS MET FOR \\ \\ / / / / / / / i • . I z= X / ° / / m m \
SUBAREA 4A VIA 9 VAC 25-870-66, SUBSECTION C.2.a CONFINES THE POST -DEVELOPMENT
10-yr PEAK FLOW). PLEASE NOTE, THE AFOREMENTIONED STORM SEWER ANALYSIS CONFIRMS / / / / �- / �� \ I ' ¢ / O Z .+ 'o
SUBAREA 4A's RUNOFF IS CONTAINED WITHIN THE CLOSED STORM SEWER NETWORK. THE \\�� �4g a �� / / O •a• W
- FLOOD PROTECTION ANALYSIS FOR SUBAREA 4A TERMINATES AT POINT OF ANALYSIS #1 �4zo- �� =_ —_ _ /// > IC \ I 3
- SINCE THE SITE'S CONTRIBUTING DRAINAGE AREA (SUBAREA 4A) IS LESS THAN OR EQUAL TO _ q14 �_�
_ 1% OF THE TOTAL STREAM's WATERSHED. THIS SUBSECTION IS C.3.A. THIS METHODOLOGY q6- a \ =a�4 /— - // / - - y _ / s
o 'Sb / — _ \ I W W
FOR CHANNEL AND FLOOD PROTECTION COMPLIANCE FOR POINT OF ANALYSIS #1 IS ��j �- �°�j _ -- //��/ --- -- I
6°
11
�-
-_ CONSISTENT WITH THE PREVIOUSLY APPROVED BROOKHILL REZONING STORMWATER j/� 6 v as4- 446-- b / / /\ 1 / I \ I / I I -,
MANAGEMENT MASTER PLAN. I �"% °`''r- b ��� / EXISTING SWM FACILITY / 1 y I °
Lor LOT I Lor OT Lor Lor `� LOT LEVEL IU WET \ / POINT OF ANALYSIS #2 / TO REMAIN UNDISTURBED / / \ POINT OF ANALYSIS #2 IS DOWNSTREAM FROM A PROPOSED DRY DETENTION BASIN NAMED \� / 1 j
DETENTION BASIN 'C'. DETENTION BASIN 'C' PROVIDES STORMWATER QUANTITY TREATMENT, LOT LOT 25 26 B' B I I / POND 1 �1 ��/_/ 1 I /• / I W
' BUT NOT STORMWATER QUALITY TREATMENT, AND DISCHARGES RUNOFF FROM LOT 2g 2y ( I I a __ ll/3 / ` ••.//� Ce o
POST -DEVELOPMENT SUBAREA (B. CHANNEL PROTECTION IS MET FOR SUBAREA 4B VIA 9 VAC I r- r- , `� I LOT / / / / POST-DEV. // / U
25-870-66, SUBSECTION B.3.d ENERGY BALANCE). THE LIMITS OF ANALYSIS FOR SUBAREA _ -' I r r r i ss 2 f /\/ / / / % /
4B's CHANNEL PROTECTION TERMINATES AT THE OUTFALL SINCE SUBSECTION B.3.a IS -, r r- r ' r r J N I `o
I — / / / I/ SUBAREA 4B:
SATISFIED. FLOOD PROTECTION FOR SUBAREA 4B IS MET VIA 9 VAC 25-870-66, SUBSECTION ' ; s.- - -i -° ' / \ ^ ,yry x�\/�/_ - 1.36 dC. o
C.2.b (POST -DEVELOPMENT 10-yr PEAK FLOW < PRE -DEVELOPMENT 10-yr PEAK FLOW). THE -_ -- -, :! I LOT4 T / , _ I� "/ / < -.
LIMITS OF ANALYSIS FOR THE FLOOD PROTECTION ALSO ENDS AT THE OUTFALL SINCE �- "_ - .4 /' CN-�� /
SUBSECTION C.2.b IS MET. PLEASE SEE THE CALCULATIONS PACKET FOR DETAILS. ` °' j - TC= . _ _-
� - �_ -_- ';' .;�i APPROVED.. � . • �I I '"^„ maoz a � � � � �
r _
�
\ I ®� , G ELE _ ,
420' OF CHNL. LOW
U
s
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- f' LOT LOT LOT LOT B
9
LOT v d LOT �3 a2 i }(
1% PI OV O 6 `
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E
' - • / � � ash/// �° � � 'i � -� � � � � \VA � � � � s � � �� o
POINT OF ANALYSIS #1 — � � � �A � �� � / � � Zell
3
c /
' i
—4s4
//w N o
� N
_ o o
LOT THE PROPOSED ARCHER AVENUE STORM C-N=92 - � %— / % / / z o
RO D BL CK 10� Lor s� I 1 �34 I I �j/�� 'T SEWER INLETS COINCIDE WITH THE APPROVED _-TC=0.10�rs.
I • a
BILKS 9-11 BERM & SWALE, HEREBY HONORING
I,`^' THE APPROVED WET POND's DRAINAGE DIVIDE.
\\ o /Lor THE POST -DEVELOPMENT SUBAREA 4A HIGH// >
/ LOT \ _ / I --I
54 _ / -__ v ;POINT IS SET BY THESE INLETS. / \� / Q 0
�ppyy s, / / °
LOT ° �s� _ -..:; 11 L 6r I / / / �_ Z Z
_ Z
LOB 53 - Or / ���/_� �- / o
t a v �
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V LOT �� W ii '-
F—
�� /
/ PRO OSED/ � n
_or tind / R E AY / / ��
_ G YP F�'L �� �" A ��Uj
\,.,' =� , LOT �/� � � l � ,'1
}
i , I +,
4# T G' PROPIfY�S,�D TRAILW Y/ / / � - - _ I I
LOB /7�� a2 >��/� ��/ ! ! �� I I 1 I F / /- - I I LU LU z o
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LOTI I A I W Q J w
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LOT
LOT / / V Post -Development Impervious Area Summary W
/� / I / \ — 44
LOT
Subarea 4A Q
v LOT / LOT 3", / V A \ - - _ _
/ By f y6 /•;,' \ \ \ \ \ Proposed Roadway & Sidewalks 25,650 sf I --I
FUTURE tOCK� — _ (J) o
Lai — _ Subarea 46
(PER APPROVED 506DIVISION
PLAT SUS ??�7100Q$) - - �� Existing Roadway 4 825 sf o
�z ��_�\Proposed Roadway 20,975 sf j
$2 i%,•`'••`�•'`�� / �I 25,800sf
- Ir"'IN
'
LOT % ; , / ��/�j / �/ / �!' . ; • , ' z / / J ' z \ ` "m
_ as / �,6 " �� /�� — WATERSHED SUMMARY FOR SUBAREA 4A
�� �� � P��''� - �`�����''��• �� \ - - MM
LOT \ / / / �• . . , J _ Area, 1-year Flow, 2-year Flow, 10-year Flow, N LJ.J
., v
sg �o� - CN ac. cfs cfs cfs
ti P DLO LOT
(Post-Dev.) 92 0.70 2.42 3.07 5.06
7 -
'
79 ; LOu / / / �� � WATERSHED SUMMARY FOR SUBAREA 46 o w
1 Area, 1-year Flow, 2-year Flow, 0- ear Flow, a =n II
LOT
B Lor / /�// / ��/ % / �— % / — — - - - _ CN ac. cfs cfs y cfs JOB No.
LOT // DA 4B (Post-Dev. 77 1.36 0.09 1.04 2.79 0
LOT / /
c2 a ` / SUBAREA AND OUTFACE SUMMARIES o
LOT ` ` '� \RA C ALj,. / / / / / / / SCALE
76 7/ �s / / 3o so z� / / -� Post-Dev. Subarea Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 Method of 9VAC25-870-66 1 °_ 60' o
(Point of Interest) Channel Protection Compliance Limits of Analysis for Channel Protection Flood Protection Compliance Limits of Analysis for Flood Protection o
SHEET NO. o
r LOT
, JIN
v
4A Section 6.1.a (2-yr Peak Flow is Not Erosive) Section 6.4.a (Subarea < 1% of Overall Watershed) Section C.2.a (10-yr Peak Flow is Confined) Section C.3.c (Contributing DA < 1% of Overall Illv
75
LOT
4B
Section B.3.a (Energy Balance)
N/A (Energy Balance Satisified)
Section C.2.b (10-yr. Post Flow < Pre Flow)
N/A (10-yr. Post Flow < Pre Flow Satisfied)
COUNTY OF ALI3N:-N1:1RLE
( i+ Depart=nt of Community Development
i I n„1�s
Construction Record Drawings (As -built) for VSMP
The following is a list of information required on construction record drawings for
stormwater facilities (reference Water Protection Ordinance 17-422). /t is preferable that the
construction record drawing be prepared by someone other than the designer. Please do not
provide design drawings as construction record drawings.
A. A signed and dated professional seal of the preparing engineer or surveyor.
B. The name and address of the firm and individual preparing the drawings on the title sheet.
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 are not limited to the following:
1. Inspection Records and photographs for pipe trenches and bedding, including underdrains.
2. Video Pipe Inspection 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 profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures - Display the
installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s),
inlet and outlet protection, alignment and invert elevations compared to design.
8. Computations: For significant deviations from design, provide sealed 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 easements 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. Biofrlter media must be an approved state mix.
13. Access roads — show location of access roads, surface treatment, drainage, etc, as applicable.
14. Compaction reports are required to verify fill compaction in dams.
15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning.
General Construction notes for Stormwater Mana9 ement 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.
ESC�LIMITi.�O�F DISTURBANCEEXPANSIO/BOUNDARY IS USED TO DEFINE /
_ THE VRRM WATER QUALITY BOUNDARY.
—PROPOSED EL SPREADER'C'
l RELEASES RUNOFF INTO A
VEGETATED FILTER STRIP WITH TYPE
B SOILS, TREATING SUBAREA 4B.
l \
APHIC SCALE
60 30 60 120
IN FEET )
1 inch = 60 ft.
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UNDER WPO 202000004 TYP.
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THE VRRM WATER QUALITY BOUNDARY.
1
LOT
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Lor se III 55 FOREST:& OPEN, SPACE
LOT EASEMENT; INSTRUMENT/ 3s I #2t}220D001747 y� / /
\ ,r / f \ ' \/ I / / / APHIC SCALE
LOT
30 60 120
/ / / // p JF� // / / / / ( IN FEET )
1 inch = 60 ft.
SCOTT/R. C13LLINS2
Lic. No. 035791,a
3/3/23
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JOB NO.
182150
SCALE
1 11= 60'
SHEET NO.
10
io' WIDETOI
ELEV.=4,
PF
PROPOSED 8' WIDE VD,
RIPRAP LINED EME
SPILLWAY W/ 4:1 SIDE S
FILTER FABRIC UNDERL/
SPILLWAY CREST ELEV.
450 450
OF DAM
6.o0'
EXISTING
GRADE
OPOSED
TRADE
`
445
445
)T CL. Al
8'
RGENCY
-OPES &
YMENT.
=444.50'.
440
440
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DETENTION BASIN 'C' SPILLWAY
422.92- BEGINNING OF
42:
PROPOSED 13'LONG FLAT LEVEL SPREADER'
HAVE A zz" DEEP PLUNGE POOL & A 6" WIDE RIGI
TO INCLUDE A VDOT CL. Al RIPRAP LINING AND A
3' (MIN.) VDOT CL. Al RIPRAP LINED EMBAI
DOWNSTREAM FROM THE RIGID LIP EXTENDINC
FILTER STRIP. ALL RIPRAP TO INCLUDE FILTEI
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 OFTHE 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.
id IDETOPOFDAW�
�LEV.=LL6.od /
CONTRACTOP SHALL
445 INSTALL EMBANKMENT
IN ACCORDA CE w
THE DESIGNS SHOWN
WITHIN THIS SET. /
EXISTING
440 GRADE /
/
455
/ PROPOSED
GRADE
/ 450
4�1
100-yr PEAK WSE=443.79
10-yr PEAK WSE=443.07
2-yr PEAK WSE=441.69
1-yr PEAK WSE=441.11
440
435 1 435
--- 432.00' PROPOSED BASIN's FLOOR
LOWER STIR. A5 CONVEYING SHALL BE SLOPED TO DRAIN TO
TREATMENT VOLUME RUNOFF THE RISER (o.5%MIN.) WITH
TO LEVEL SPREADER'C' POSITIVE SLOPES THROUGHOUT.
UPPER STRIA 3CONVEYING
�
STORM EVENTS IN EXCESS OF
THE TREATMENT VOLUME
425
PROPOSED VDOT I
STD. EW-1
420.00'
43
BASIN'S FLOOR SHOALL CONSIST OF
A iz" DEEP PEA GRAVEL LAYER
(TOP OF STONE ELEV.=436') AND A
FILTER FABRIC UNDERLAYMENT TO
REDUCE THE RISK OF CLOGGING.
1 4251
TO PREVENT FLOTATION
THE RISER
BASE
HALL BE FIRMLY qMBEDDED
6" INTq
AN 18"
TICK REINFORCER
CONCRETE FOUN
ATION
HAT IS 8'x8', AND
URIED BELOW G
OUND.
420 1 1 4201
PROPOSED VDOT STD. EC-1, CLASS Al RIPRAP LINED OUTLET
PROTECTION WITH FILTER FABRIC UNDERLAYMENT(L=19't,
PROPOSED ' W,=10% Wz=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)
0+00 0+50 1+00 1+50 2+00
DETENTION BASIN 'C' SECTION
NOTE:
LEVEL SPREADEWCAND THE FILTER STRIP
SHALL BE INSTALLED & STABILIZED IN ESC
PHASE III, PRIOR TO THE ACTIVATION OF
STIR. Az & THE CONVERSION OF SEDIMENT
455
TRAP #3TOAPERMANENT SWIM FACILITY.
455
450
/ 450
/
DETENTION
/
BC'
'445
EXISTING--,,./
445
GRADEASI
/
/
440
1
440
STR-A4:
PROPOSED
GRADE
/
(MODIFIED MH-1,
STIR. Az, RISER
DUE TO HEIGHT)
PROPOSED
TP=425-75'
012" CL. 52
/
INV IN: 424.00 TO
DIP W/L
435
INV OUT: 423.25 TO
/
LEVEL SPREADER=STR. A31NV. OUT
UPPER STIR.
Ai CONVEYINGSTORM
EVENTS
IN EXCESS OF
..75-BOTTOM OF LEVEL SPREADER
THE TREATMENT
VOLUME
,22.75- TOP OF LEVEL SPREADER
/
430
;°
430
/
_'. LS TO
/
)LIP LS
/
A5
SLOPED
!KMENT
TO THE
FABRIC
/
15" HDPE
S' DEEP.
425
161.73 LF
425
IP TO BE
@3.71%
6"HDPE
E SHEET
/
9.46 LF
L
WEIRSTIR. A5 CONVEYING
IE BACK
IPMENT
/
j
A3
Qa 3.49%
TR
ATMENT VOLUME
RUNOFF
TO
STR. A3 (6" HDPE)
LEVEL
F 12 FOR
jSPREADER'C'
!MENTS'
22.6
420
420
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LEVEL SPREADER'C
DETENTION BASIN'C' DETAIL, SCALE I^=30'
CONTRACTOR SHALL CALL THE COUNTY
INSPECTOR & ENGINEERING 4-HOURS BEFORE ANY ANTICIPATEDENT
CONSTRUCTION ACTIVITIES FOR THE DRY BASIN.
V
LIMITS'OF THE
�ROOKHILL / /
/
--- DEVELOPMENT
PROPO��EEDD V�T Sy�o�C. EC�C� I RIPRAP� / / / + / / /z
.- LINED/OUT� ET PROTECTIONWITH�LTE FABRIC/ z
k - UN ERLAYMENT (L=19't, 1 ', W �19', D--18"� +/
\ SJbN TO E INis� ALLED FL
TO 'EXT D TO' z / /
\ THE�f,'F�HA�:ELT ANXFILTER FABRIC HALL BE
/K�YED INTO/THE XISTING GROUND/AT IN TINU//
/ iOF 9" AT THE;DO ALONE,, P* 9" E I / ro REMAIN, TYP.
FENCE
FA/ IC HALL OVERLAP A IN. 9" '3='°' /
%/// /�/ //
/ TP/O REVE LLBLOTR'ATION' HEDD
✓ \ T\/ �S 'PROPOSED VARIAB�WI/H \� EXISTING SWIM
l\CONCRAEFOTHID�ONAT IS / SWIM MAINTENANCE ESMT. � FACILITY
AREMAINTO
/Sk8',ANU BURIED BELOW GROUND.
v/ / v ,Xo / ��u �,
/ \ 2 -�i,
/ /10'WIDE/FOP �DAM'
` \ /
/ EL V.-446.00') PR VIDES SAFE Y PROPO ED�AS4( s FLOOR SHALL BE //
' RO ND HE MyACI LIT/Y / SLOPED 0 RAI TO ERISER( MIN-.
L / /� \ WITH POSIT\IV S'L�ESTHROUGHO�
'rROpOSED8'WID VD TCLAI/ 'C \ \\�� � \� \ / ��
iRIPhAP LINED EME GENCY \ \ j NTRACTOR SFJALL�OCATE TH6 POT��N
SPILLWAY w/ 4:2 SIDE SLOPES & - — F HEEXIST G F NCE,AS'SjHOWN
-� - PqERL YMENT. I / ��� AACCOMMODATE H ROADsT -IN FSRAO€S
ILTER FABRIC UN
SPILLWAYCR�ESTEL VA444-5'P'-�1 ¢ \ \ II��\\� PROVIDE SAFFFF �AROUiV FACILITY. �i9//I b�
\
M SEE THIS SHEET FO!SCALED
\ PROFILES OF THE DRY BASIN, TYP.
-_ PR POSED PUBLIC ROAD, $
SI EWALK AND GRASS 6
�C PROPOSED STIR. AS & THE \- LINED ACCESS TO SERVE AS \
DOWNSTREAM DRAINAGE F CCESS TO THE DRY BASIN
-_-_-_ SYSTEM TO CONVEY THE .\ VEGETATED FILTER STRIP.
TREATMENT VOLUME FLOW TO'W
--- LEVEL SPREADER'C' &THE - -
-_--- VEGETATED FILTER STRIP FOR -
WATER QUALITY TREATMENT.
2z
0�00 yzz.ob
4 — toq SLOP z% \ \ \
SLOPE � — \ STR.A
RANGE 22 70'
1-49
V 22. A A \
42 \ B�EGINNING OF LEVEL SPR�DER\ \ \
421.75 -\BOTTOM OF'LEVEL SPREADER \ \ \ \
�432.75- TOP OF EL S�R€ADE�
PROPOSED i3'LONG FLAT LEVEL SPREADER'C'. LS TO HAVE A iz"DEEP ¢
PROPOSED CONSERVED PLUNGE POOL & A 6" WIDE RIGID LIP. LS TO INCLUDE A VDOT CL. Al RIPRAP \ \ \
—OPEN SPACE EASEMENT —LINING AND A SLOPED 3' (MIN.) VDOT CL. Al RIPRAP LINED EMBANKMENT \
"DOWNSTREAM FROM THE RIGID LIP EXTENDING TO THE FILTER STRIP. ALL \ \
RIPRAPTO INCLUDE FILTER FABRIC UNDERLAYMENTS & BE A MIN. OF 6" DEEP.
PROPOSED 13'Wx35L' VEGETATED FILTER STRIP. FILTER r
STRIP TO BE UNIFORMLY GRADED TO THE SLOPES SHOWN s—s
TO ENSURE SHEET FLOW BELOW THE LEVEL SPREADER.
CONTRACTOR TO TIE BACK GRADES AT 6:z&PREVENT SOIL/ / - s Jp
COMPACTION BY HEAVY EQUIPMENT WITHIN THE LIMITS
OF THE FILTER STRIP. SEE THIS SHEET FOR ADDITIONAL
-----_ FILTER STRIP DETAILS & DESIGN REQUIREMENTS.
f
GRAPHIC SCALE
30 80
mmi
( IN FEET )
1 inch = 30 ft.
SCOTT/R. Cl!�LLINS2
Lic. No. 035791,a
3/3/23
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JOB NO.
182150
SCALE
AS SHOWN
SHEET NO.
11
DRY DETENTION BASIN CONSTRUCTION NOTES:
FACILITY 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 ALL TIMES 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 OF THESE COMPACTED SOILS CAN BE SO GREAT THAT 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 BALL -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 FORA FEE FROM THE VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS,
VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS). ALL DISCREPANCIES SHALL BE BROUGHTTO THE
ATTENTION OF COLLINS ENGINEERING PRIOR TO THE CORRESPONDING CONSTRUCTION ACTIVITY.
3. ALL PLANT MATERIAL SHALL MEET THE MINIMUM SPECIFICATIONS AND STANDARDS DESCRIBED IN THE CURRENT ISSUE OF THE AMERICAN STANDARD FOR
NURSERY STOCK, PUBLISHED BY THE AMERICAN ASSOCIATION OF NURSERYMEN, 1250 STREET, NW, SUITE 500, WASHINGTON, DC 20005.
4. THE CONTRACTOR SHALL VERIFY ALL DIMENSIONS IN THE FIELD AND NOTIFY THE DESIGNER OF ANY VARIANCE FROM THE PLAN.
S. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR VERIFYING THE LOCATION OF ANY ONSITE UTILITIES (CALL MISS UTILITY AT 1-800-552-7001 BEFORE
ANY EXCAVATION).
6. REFER TO THE APPROVED FINAL ROAD PLANS FOR ANY DETAILED SITE INFORMATION.
7. ALL WORK SHALL BE COORDINATED WITH OTHER PARTIES.
8. PLANTS WILL BE PREPARED FOR SHIPMENT IN A MANNER THAT WILL NOT CAUSE DAMAGE TO THE 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
HOLD ITS SOIL. 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 MAYBE 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 SUFFICIENTTO CONTAIN THE ENTIRE ROOT BALL OR
ROOT MASS, WITHOUT CRAMPING ROOTSTOCK.
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 MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER ACTIVITIES BEYOND THE
CONTRACTOR's CONTROL.
FACILITY CONSTRUCTION
1. DETENTION BASINS MAY SERVE AS SEDIMENT BASINS AND/OR 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, AND DESIGN ELEVATIONS SHALL BE SET WITH FINAL
CLEANOUT OF THE SEDIMENT BASIN AND CONVERSION TO THE POST -CONSTRUCTION FACILITY IN 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 IS COMPLETELY STABILIZED. IF THE
PROPOSED BASIN's SITE WILL BE USED AS A SEDIMENTTRAP 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 SHALLASSEMBLE CONSTRUCTION MATERIALS ON -SITE, MAKING SURE THEY MEET DESIGN SPECIFICATIONS AND ARE PREPARED AT
STAGING AREAS WHEN POSSIBLE.
4. THE CONTRACTOR SHALLCLEAR AND STRIPTHE PROJECTAREA IF REQUIREDTO 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 INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE.
7. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) WITH PERMANENT COLLARS DURING THE ESC PHASE.
CONTRACTOR SHALL ENSURE THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION.
8. THE CONTRACTOR SHALL CONSTRUCT THE EMBANKMENT AND ANY INTERNAL BERMS 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 IN TABLE 14.4 BELOW:
Table 14.4. Clay liner Specifications
Property
Permeability
Test Method
ASTM D-2434
Una
Cm/sec
Specification
1 x 1
Plasticity Index of Gay
ASTM D423/424
%
Not less than 15
Liquid Limit of Clay
ASTM D-2216
16
Not less than 30
Clay Parlides Passing
ASTM D-422
%
Not less than 30
clay Com Dion
ASTM o-2216
%
95% of standard WgCW don -
Source: Virginia Stormwater Managmellt Handbook J19N)
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 THE CONTRACTOR IN THE FIRST YEAR FOLLOWING INSTALLATION, AND THE
OWNER THEREAFTER:
1. 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, JOINT 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 IS 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 STRUCTUREIS).
4. DETENTION BASIN INSTALLATION Ie.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 SWM NOTES:
1. 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
AND 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 EMBANKMENT SIDE SLOPES OF ALL PERMANENT
FACILITIES SHALL HAVE A MAXIMUM 3:1 SLOPE.
5. CONTRACTOR SHALL EXCAVATE SEDIMENT LADEN MATERIAL IN THE ESC
SEDIMENT TRAPS & BASINS, IF APPLICABLE, AT THE TIME OF THE FACILITIES'
CONVERSIONS TO PERMANENT SWM FACILITIES. AT SUCH TIME THE
CONTRACTOR SHALL REGRADE THE SEDIMENT TRAPS AND/OR BASINS 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 FALL AND WINTER MONTHS. INSPECTIONS SHALLTRIGGER
MAINTENANCE OPERATIONS AS REQUIRED. MAINTENANCE OPERATIONS MAY INCLUDE BUT IS NOT LIMITED TO SEDIMENT REMOVAL PERIODIC MOWING
REPAIR OF THE 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 OF THE 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 INCLUDE THE FOLLOWING AT MINIMUM:
1. 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 (Ater Rubrum) and Sweetgum
(Liquidambar Styraciflua).
Table 2.4. Vegetated Filter Strip Materials Specifications
Material
Specification
Quantity
Pea Gravel (#8 or ASTM equivalent) or
Diaphragm should be 2 feet wide, 1
Gravel
where steep (6% +) use clean 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.
Geotextile material appropriately selected for placement under rip rap or gravel to
Finer Fabric
effectively separate the stone from the ground below.
Engineered
Level Spreader lip should be concrete, metal, timber, 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.
EfOSIOn
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
Erosion Control matting EC-3).
Matting
If existing topsoil is inadequate to support dense turf growth, imported top soil
(loamy sand or sandy loam texture), 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% M be used. Topsoil iiIIlifil be uniformly distributed and
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. Composting Seal of Testing Assurance (STA) program, as outlined in
Stormwater Design Specification No. 4.
VA AGA ME95TORMWATER DESIGN SPECIFICATION NO. 2 SHEET FLOW TO FILTER OR OPEN SPACE
KEY LEVEL SPREADER
INITO EXISTING GRADE
RIPRAP PLUNGE POOL
1.
RIPRAP APRON rY ';•�!ti
6" X 6" TREATED
_T If5 TIMBERS OR
_ LIP
I wCO�NCRETE
a LENGTH OF LEVEL SPREADER
LIP TO BE BASED ON DESIGN FLOW
- AND ALLOWABLE VELOCITY
I'
TOP OF LEVEL SPREADER
-T i4M1A(
: iC SHALL BE FLAT
4.
,I
1-3 IN. COURSE AGGREGATE
OR OTHER LINING AS
DESIGNED FOR STABILITY
PLAN VIEW
DIMENSION BASED ON ut471E FIBED"It;T•.K1 C lFk DE
DESIGN DISCHARGE 5%(20:1) OR LESS. IF VEGETAT®
UPA PSTRIP OR Cga5EF4VLaJ
OPEN SPACE 9iR9T 10 FEET LESS
71 3' MIN THAN 2%
I OMIN
s MIN
II
12' .
Y.
MIN DEPTH BASED O
1 - REQUIREC STONE SIZE
r I TT tl r-
II-
SECTION A -A
Figure 14: Le1'e1.Spreader: Pipe or Chanel Flow to Filter Ship orprielCewee!-Consen-ed
Open Space
LEVEL SPREADER NOTES:
1. FIRST 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 i WEEK PRIOR TO
THE CONSTRUCTION OF THE LEVEL SPREADER. COLLINS ENGINEERING's PRESENCE IS REQUIRED AT THE TIME OF
THE LEVEL SPREADER's CONSTRUCTION SO THAT THE LEVEL SPREADER'S FINAL LOCATION CAN BE FIELD VERIFIED.
FINAL LOCATION MAY VARY SLIGHTLY FROM THE APPROVED PLAN IN ORDER TO PRESERVE A LARGE TREE(s).
4. CONTRACTOR SHALL USE A GEOTEXTILE FILTER FABRIC UNDERLAYMENT BELOW THE PROPOSED LEVEL SPREADER
STONE. THE GEOTEXTILE FILTER FABRIC SHALL BETENSAR TX-5TRIANGULAR GRID, OR EQUIVALENT.
1 /2" zinc Dialed hook
attached with a/Bu fastener
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1/4- HDPE plate (optional)
P1De i
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SECTION A-9: TYPICAL GRAPHICAL DETAILS
Homogeneous fill
)
4 min
Cut off trench-4' below suitable
material
Soil arrock L-----------J
TYPICAL HOMOGENEOUS
EMBANKMENT
FOUNDATION DRAIN
CHIMNEY DRAIN
fiO3
Z
Transition fill
,Rock or grovel
'�-Bl6nket drain
BLANKET DRAIN
r rlxY
Rock or grace)
e drain
Transition filter
TOE DRAIN
Figure A -la. Homogeneous Embankments it/Seepage Controls
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, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON
COMPACTING SOIL. COMPACTED FILL SHALL 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 (OR EQUIVALENT)
CONCRETE MANHOLE
STANDARD 50 INCH RACK SHOWN
DIMENSIONS IN INCHES
A T
PLAN
SIDE VIEW
StortnRaxTM Round Series for Concrete Manhole
Part Na
like
Dime
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Min ID
MinOD
RS-24
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PO Bloc 43a6, N'Irclrstcr, YA 22604
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OUTSIDE STRUCTURE DIMENSION
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DATE
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Brookhill
Stormwater Quality Summary
Table
Required Phosphorous
��TH 0
Removal Rate (Ibs/yr)'�'"
17.72
SCOTT
R.
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TBD
U Lic.
No.
035791,'
3/3/23
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Total Required
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Phosphorous Removal
V,
Rate (Ibs/yr) to Date
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Removal Rate Provided
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(Ibs/yr) to Date
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Notes:
Rate Percent Provided
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1. To date, the total required phosphorous removal rate is 87.98 lbs/yrand the total phosphorous removal rate achieved through onsite SWM facilities is 66.01 Ibs/yr. This leaves a deficit of 21.97 Ibs/yr (87.98-66.01) that is mitigated through nutrient credit purchases. In
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accordance with stormwater regulations, the overall Brookhill Development is allowed to use offsite
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2. Actual purchased nutrient credits assoicated with the approved plans to date is 12.01 lb/yr.
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3. Nutrient credits
proposed to be purchased with VSMP 201700037 Amendment #4 is 8.96 lbs/yr and
with this VSMP plan (WPO 202200040) is 1.00 Ibs/yr.
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STORMWATER
QUALITY SUMMARY NOTE:
AS SUMMARIZED
ABOVE IN
NOTES #1-3, THE TOTAL PHOSPHOROUS REMOVAL RATE REQUIRED TO
DATE IS 87.98 Ibs/yr FOR THE
b
Required Phosphorous
OVERALL BROOKHILL DEVELOPMENT. ADDITIONALLY, THE TOTAL PHOSPHOROUS REMOVAL RATE PROVIDED
ONSITE IS 66.01
Ibs/yr
0
Removal Rate (Ibs/yr)
FOR THE OVERALL BROOKHILL DEVELOPMENT. A MINIMUM OF
75% OF THE REQUIRED PHOSPHOROUS REMOVAL RATE PROVIDED
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Section
Block
Common Name
SWM Facility ID
Type of Facility
Phosphorus Removal
achieved w/proposed plan
(Ib/yr)
Plan #
Surplus Amount
of Offsite Credits
Created (Ib/yr)
Amount of Offsite
Credits Purchased
(Ib/yr)
Percent of Total
Development
Offsite Credits (%)
1
4A
Apartments
Pond 11
Wet Pond
4.01
WP0201800051
0
1.27
5.8%
1
4A
Apartments
DP-4A
Detention Pond w/ Underground Storage
-
WP0201800051
1
4A
Apartments
CDS-4A
CDS Unit (Manufactured Device)
1.60
WP0201800051
1
4A
Apartments
LS-11
Sheet flow to open space REMOVED
-
WP0201800051
1
4B
Apartments
Pond 11
Wet Pond
0.18
WP0201800051
1
4B
Apartments
UD-46
Isolator Row (Manufactured Device)
3.38
WP0201800051
1
48
Apartments
Pond 48
Extended Detention Pond
0.79
WP0201800051
1
4B
Apartments
LS-4B
Sheet flow to open space
0.74
WP0201800051
1
-
ROW
Pond 11
Wet Pond
0.18
WP0201800013
0
1.09
5.0%
1
-
ROW
LS-11
Sheet flow to open space REMOVED
-
WP0201800013
1
-
ROW
LS-11
Sheet flow to open space REMOVED
-
WP0201800013
1
8B
ROW and Block 8B
Pond 10
Wet Pond
5.91
WP0201800080
0.68
1.53
7.0%
1
-
ROW
LS-10
LS-10 REMOVED
-
WP0201800080
1
-
ROW
LS-10
LS-10 REMOVED
-
WP0201800080
1
1
3
3
Village Center and
Salamander Street
Pond4
LS-4.1
Wet Pond wth Downstream
Sheet flow to open space
23.62
WP0201700037
(Amendment#4)
0
0
0.0%
1
3
Village Center
LS'B'
Sheet flow to vegetated filter strip
717
WP0201700037
(Amendment #4)
0
8.96
40.8%
1
3
Salamander Street
Pond 11
Wet Pond
0.38
WP0201800050
0.08
0
0.0%
1
3
Salamander Street
LS-11
Sheet flow to open space REMOVED
-
WP0201800050
1
8A
Senior Living Facility
Pond 11
Wet Pond
3.70
WP0201900004
0.01
0
0.0%
1
8A
Senior Living Facility
LS-11
Sheet flow to open space REMOVED
-
WP0201900004
Section 1 Master Plan Comparison
Section
SWM Facility ID
Phosphorus Removal proposed
w/master plan (Ib/yr)
Phosphorus Removal
achieved w/proposed plan
(Ib/yr)
Anticipated Amount of
Offsite Credits
Purchased (Ib/yr)
Anticipated Percent of
p
Total Development Offsite
Credits (%)
Amount of Offsite
Credits Purchased
(Ib/yr)
Percent of Total
Development
Offsite Credits (%)
1
Pond4Treatment Total
6.77
23.62
1
Pond 7 Treatment Total
8.11
TBD
1
PondlOTreatmentTotal
6.94
6.59
1
Pond 11 Treatment Total
9.68
8.54
1
Pond 48 Treatment Total
-
0.79
1
Manufactured Devices Treatment Total
2.62
4.98
1
Infiltration Treatment Total
21.71
0
1
Level Spreader'B'
-
7.17
1
Level Spreader 4B
9.74
0.74
Section 1 BMP Treatment Total
65.57
52.43
Section 1 Offsite Nutrient Credits Total
6.8
20.0%
12.85
38%
Section
Block
Common Name
SWM Facility ID
Type of Facility
Phosphorus Removal
achieved w/proposed plan
(Ib/yr)
Plan #
Surplus Amount
of Offsite Credits
Created (Ib/yr)
Amount of Offsite
Credits Purchased
(Ib/yr)
Percent of Total
Development
Offsite Credits (%)
2
9
Townhouses
Blk 9 Wet Pond
Level II Wet Pond
5.87
WP0201800086
0
2.10
6.2%
2
10
Townhouses
Blk 10- UGD
Underground Detention (No Water Quality)
-
WP0201800086
2
11
Townhouses
-
-
WP0201800086
2
N/A
Archer Avenue Extension
Level Spreader'C'
Level Spreader to Vegetated Filter Strip
0.82
TBD
0
1.00
2.9%
Section 2 Master Plan Comparison
Section
SWM Facili
Phosphorus Removal
Anticipated Amount of
Anticipated Percent of
Amount of Offsite
Percent of Total
Required Phosphorous
Removal Rate (Ibs/yr)
14.17
1.12
6.74
30.68
5.68
Section
Block
Common Name
SWM Facility ID
Type of Facility
Phosphorus Removal
achieved w/proposed plan
(Ib/yr)
Plan #
Surplus Amount
of Offsite Credits
Created (Ib/yr)
Amount of Offsite
Credits Purchased
(Ib/yr)
Percent of Total
Development
Offsite Credits (%)
5
16
Single Family Housing
Level Spreader'A'
Sheetflow to Conservation Area with A/B soils
6.89
WPO 20210007
0
0.0%
5
17
Single Family Housing
UGD'B'
Underground Detention (No Water Quality)
WPO 20210007
6.02
17.7%
5
18
Single Family Housing
TBD
TBD
TBD
TBD
TBD
TBD
Section S Master Plan Comparison
Section
SWM Facility ID
Phosphorus Removal proposed
w/master plan (Ib/yr)
Phosphorus Removal
achieved w/proposed plan
Ib r
( /y)
Anticipated Amount of
Offsite Credits
Purchased Ib r
( /y)
Anticipated Percent of
Total Development Offsite
Credits %
( )
Amount of Offsite
Credits Purchased
Ib r
( /y)
Percent of Total
Development
Offsite Credits %
( )
5
Pond l4A Treatment Total
4.81
TBD
5
Pond l4B Treatment Total
6.42
TBD
5
Pond lSATreatment Total
5.16
TBD
5
Pond lSB Treatment Total
5.14
TBD
5
Pond l6 Treatment Total
11.75
TBD
5
Grass Channel Treatment Total
2.1
TBD
5
Sheet Flow to Open Space Treatment Total
1.43
6.89
5
Blocks 16-17 Wet Pond
-
0
Section 5 Treatment Total
36.81
6.89
Section SNutrient Credits Total
6.8 20.0%
6.02
17.7%
Overall Treatment Total
141.28 66.01
Overall Nutrient Credits Purchased
34 100.0% 21.97 64.6%
Anticipated Treatment Total With SWM Master Plan 175.56
mill
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