HomeMy WebLinkAboutWPO201700052 Plan - VSMP 2022-01-11WIV41 /40.11 /1I01111" y
OWNER/APPLICANT.05100-00-00-165RO
DUNLORA INVESTMENTS, LLC
455 SECOND ST SE, SUITE 400
CHARLOTTESVILLE, VA 22902
ENGINEER: COLLINS ENGINEERING
200 GARRETT ST, SUITE K
CHARLOTTESVILLE, VA 22902
(434)293-3719
TAX MAP NO.: 06100-00-00-165RO (OB 4967 PG 169)
TOTAL PROJECT AREA: 8.62 ACRES TOTAL (PHASE I = 7.60 AC, • PHASE ll = 1.02 AC)
ZONING: R-4 RESIDEN77AL (BY -RIGHT) - NO PROFFERS
AIRPORT IMPACT AREA (AIA)
PROPOSED USE: PHASE l -
16 SINGLE FAMILY ATTACHED UNI7S AND
12 SINGLE FAMILY DETACHED UNITS
PHASE ll - 3 TOWNHOUSES & 3 SINGLE FAMILY DETACHED HOUSES
REQUIRED DENSITY: 4 DU/AC CLUSTER DEVELOPMENT
(NO MINIMUM LOT SIZE)
PROPOSED DENSITY: PHASE l - 28 UNITS
PHASE ll - 6 UNITS
TOTAL - 34 DU/8.62 AC = 3.94 UNITS/AC
OPEN SPACE.' RED. 2.16 AC OF DEVELOPMENT AREA (259);
PROV.• OPEN SPACE A (0.05 AC) + OPEN
SPACE B (255 AC) = 260 AC (30.29,)
0.98 AC OUTSIDE CRITICAL SLOPES AND SWM (387 OF TOTAL)
THE OPEN SPACE WILL BE DEDICATED TO THE HOA FOR PUBLIC USE
BUILDING HEIGHTS. MAXIMUM BUILDING HEIGHTS SHALL NOT EXCEED 35'
NON-INFILL SETBACKS. FRONT. 5' MIN AND 25' MAX
SIDE: 10' BUILDING SEPARATION
REAR: 20' MIN AND NO MAX
SUBDIVISION STREETS: PHASE l - CURB & GUTTER (PARKING ON ONE SIDE ONLY)
PHASE ll - UNITS FRONTING RIO ROAD & DUNLORA DRIVE WITH
PRIVATE ACCESS ALLEY FROM VARICK STREET
WATERSHED: THIS PARCEL IS NOT IN A WATER SUPPLY PROTECTED AREA SITE DRAINS TO MEADOW CREEK.
AGRICULTURAL/ FORESTAL DISTRICT.• NONE
TOPO & SURVEY.' TOPOGRAPHY AND BOUNDARY INFORMAT70N PROVIDED WITH
ON -GROUND SURVEY BY CARDINAL SURVEY IN SEPTEMBER 2016.
NOTE.' TOPOGRAPHY HAS BEEN UPDATED FOR PHASE I LAND
DISTURBANCE. TOPO VISUALLY FIELD VERIFIED IN AUGUST, 2021.
DATUM: NAD 83
EXISTING VEGETATION: PAR77ALLY WOODED WITH EXISTING RESIDENCE STRUCTURES
LIGH77NG: NO LIGH77NG IS PROPOSED
PHASING THIS PLAN IS PHASE ll OF DUNLORA PARK (WINTER OF 2021)
RECREATION: 2.60 ACRES OPEN SPACE (PASSIVE RECREA7ON AREA)
PARKING PHASE ll: 2 OFF-STREET PARKING SPACES SHALL BE PROVDED FOR
EACH DWELLING UNIT + 1 SPACE PER (4) UNITS FOR GUEST
PARKING.
TOTAL PARKING REQUIRED:
12 SPACES ON THE LOTS + (1) GUEST SPACES
TOTAL PARKING PROVIDED:
12 SPACES ON THE LOTS + (1) GUEST SPACES
BUILDING SITTS. PARCELS 1-34 MAY NOT BE FURTHER DIVIDED. ONLY (1) DWELLING
UNIT PER LOT SHALL BE ALLOWED.
BURIAL SITES: NONE
STREAM BUFFERS/FLOODPLAIN. THERE /S A PORT70N OF A WPO STREAM BUFFER LOCATED AT
THE SOUTHEAST CORNER OF 7HE SITE THERE IS NO 1DO- YEA R
FLOODPLAIN LIMITS ON THE SUBJECT PARCEL, PER FEMA MAP
51003CO229D, FEBRUARY 4, 2005.
OFFSITE DISTURBANCE: NO OFFSIDE DISTURBANCE IS PROPOSED WITH THIS PLAN, EXCEPT
FOR THE TIE-IN CONNECT70N TO THE SANITARY SEWER
WITHIN EXIS77NG UTILITY EASEMENT
LANDSCAPING: STREET TREES ARE PROPOSED ALONG THE NEIGHBORHOOD STREETS
IN ACCORDANCE WITH ALBEMARLE COUNTY LANDSCAPING
REQUIREMENTS
LAND AREAS. OPEN SPACE: 2.60 AC. (30%)
LOTS 4.86 AC. (567
ROW/ACCESS ESMT DEDICATION: 1.16 AC. (147)
IMPERVIOUS AREA:
ROADWAY= 29,600 (PHASE l) + 6,974 (PHASE ll) = 36,574 SF (0.84 AC)
SIDEWALK/DRIVEWAYS= 21,188 (PHASE I) + 1,267 (PHASE /1) = 22,455 SF (0.52 AC)
BUILDINGS= 63,700 (PHASE I) + 7,955 (PHASE ll) = 71,655 SF (1.64 AC)
ITE TRIP GENERATION: TRAFFIC IMPACT NUMBERS ARE BASED ON THE ITE TRIP GENERATION
MANUAL, 8TH EDITION.
PHASE 1.
CODES 210 WERE USED FOR THE DEVELOPMENT
PROPOSED 28 DWELLING UNITS
ADT RATE - 268 ADT (134 ENTER/134 EXIT)
AM PEAK RATE - 21 VPH (5 ENTER/16 EXIT)
PM PEAK RAT?= - 28 VPH (18 ENTER/10 EXIT)
PHASE //.
CODES 230 & 210 WERE USED FOR THE DEVELOPMENT
PROPOSED 3 TOWNHOUSE UNITS & 3 SFD UNITS
ADT RA7E - 46 ADT (23 ENTER/23 EXIT)
AM PEAK RATE - 3 VPH (1 ENTER/2 EXIT)
PM PEAK RATE - 5 VPH (3 EN7ER/2 EXIT)
SLOPES: THIS SITE CONTAINS BOTH MANAGED AND PRESERVED SLOPES AS
SHOWN ON THIS PLAN.
TRASH. ALL TRASH SHALL BE COLLECTED BY A DRIVING DUMPSTER
SERVICE - EACH LOT SHALL HAVE AN INDIVIDUAL TRASH
CONTAINER.
LIGH77NG: NO ON STREET LIGH77NG IS PROPOSED WITH THIS PLAN.
DAM INUNDATION: THIS PROPERTY IS NOT LOCATED WITHIN A DAM INUNDA7ON ZONE.
FIRE FLOW.' AS REQUIRED, ALL FIRE FLOWS WITHIN THE DEVELOPMENT SHALL BE
A MINIMUM OF 1000 GPM AT 20 PSI. ADDIT70NALLY, FIRE HYDRANTS
SHALL BE PROVDED ALONG THE ROADWAYS FOR FIRE PREVENTION
AT A MAXIMUM SPACING OF 500 FT PER TRAVELWAY.
EXISTING FIRE FLOW 1135 GPM WITH 66 PSI PRESSURE.
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OWNER
DUNLORA INVESTMENTS, LLC
455 SECOND STREET SE, SUITE 400
CHARLOTTESVILLE, VA 22902
Al9uh7_II11A lelul40:d/i!9 419911114Wel:FAMC F!
THIS AMENDMENT #4 UPDATES THE PREVIOUSLY APPROVED WPO 201700052 AMENDMENT #2. THIS
AMENDMENT NOW MATCHES THE RECENTLY APPROVED PHASE II LAYOUT UNDER SDP 202100023 MAJOR
SITE PLAN AMENDMENT, WHICH IS AN AMENDMENT TO SDP 201800002. THIS AMENDMENT#4 REFLECTS
THE LESS IMPERVIOUS PHASE II LAYOUT AND THE REPLACEMENT OF THE PHASE II UNDERGROUND
DETENTION SYSTEM WITH A NEW PHASE II DRY DETENTION BASIN (SWM FACILITY'B.).
ENGINEER
COLLINS ENGINEERING
200 GARRETT STREET, SUITE K
CHARLOTTESVILLE, VA 22902
D�yul7_1'ulq�la7u1�►:E°i!►[e11�
1. THE APPROVED WPO AMENDMENT#2 IS VOIDED WITH THE APPROVAL OF THIS PLAN AMENDMENT.
2. THE APPROVED WPO AMENDMENT#3 IS REPLACED WITH THE APPROVAL OF THIS PLAN AMENDMENT.
3. THE PHASE II RETAINING WALL ADJACENT TO SWM FACILITY'B' SHALL BE DESIGNED, SUBMITTED AND
APPROVED BY THE COUNTY PRIOR TO THE ISSUANCE OF A BUILDING PERMIT.
4. THE SWM FACILITY EASEMENT, DEED & PLAT WILL NEED TO BE RECORDED PRIOR TO FINAL SITE PLAN
APPROVAL.
5. PHASE I CONSTRUCTION IS SUBSTANTIALLY COMPLETE.
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Sheet List Table
Sheet Number
Sheet Title
1
COVER
2
EXISTING APPROVED CONDITIONS
3
EROSION & SEDIMENT CONTROL NARRATIVE
4
PHASE I EROSION & SEDIMENT CONTROL PLAN
5
PHASE II EROSION & SEDIMENT CONTROL PLAN
5A
PHASE III EROSION & SEDIMENT CONTROL PLAN
6
EROSION & SEDIMENT CONTROL NOTES & DETAILS
STORMWATER MANAGEMENT PLAN (PRE -DEVELOPMENT)
8
ST_RMWATER MANAGEMENT PLAN (POST -DEVELOPMENT)
9
STORMWATER MANAGEMENT NOTES & DETAILS
10
STORMWATER MANAGEMENT NOTES & DETAILS
11
GRADING & UTILITY PLAN
12
TOTAL NUMBER OF SHEETS
APPROVED
by the Albemarle County
Community Development Department
Date 1/11/22
Ill TAIITA I411YIIi YLITITIiw�
Amendment 4
EROSION & SEDIMENT CONTROL LEGEND
LIMITS OF LAND DISTURBANCE
SAFETY FENCE PER VESCH 3.01
DIVERSION DIKE
CE
CONSTRUCTION ENTRANCE PER VESCH 3.02
BOUNDARY LINE
SILT FENCE
SF
SILT FENCE PER VESCH 3.05
DIRECTION OF FLOW
IP
INLET PROTECTION PER VESCH 3.07
653.75 PROPOSED CONTOUR
- DRAINAGE DIVIDE
DD
DIVERSION DIKE PER VESCH 3.09
SOILS LINE
SB
SEDIMENT BASIN PER VESCH 3.14
MANAGED SLOPES
OP
OUTLET PROTECTION PER VESCH 3.18
PRESERVED SLOPES
BT
SOIL STABILIZATION MATTING VESCH 3.36
STREAM BUFFER
OPEN SPACE PRESERVATION
SITE PLAN LEGEND
EXIS77NG CULVERT
0 CULVERT
DROP INLET
CURB
0 CURB & GUTTER
0 PROPOSED PAVEMENT
PROPOSED PERM PAVERS
DRIVEWAY CULVERT
- - MOT STANDARD STOP SIGN
mo EXISTING CONTOUR
PROPOSED CONTOUR
240.55 PROPOSED SPOT ELEVA770N
Lic. No. 035791
12/13/21
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EXISTING ROADSIDE DITCH PROPERTY LINE (TYP. CLUB DUNLORA, LLC. NOTES:
1
PARCEL: 1. zoi-zoRA IMPROVEMENTS SHOWN HEREIN ARE APPROVED PER DUNLORA PARK ROAD & UTILITY PLAN SUB66 AND DUNLOTH 0
F
g PARK VSMP PLAN WPO-201 - (AMENDED WPO-zo16- 8).
1 i � (D.B. 3574, PG. 668) 7 35 5 /
\ 1 \ R-4 RECREATIONAL CLUB EXISTING PRESERVED z. THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS, BASED ON FEMA MAP NUMBER 51003Co229D, DATED O �
\ i STEEP SLOPES FEBRUARY 4, z005. � �
3. TOPOGRAPHY & BOUNDARY INFORMATION PROVIDED BY ON -GROUND SURVEY BY CARDINAL SURVEY IN SEPTEMBER SCOTT R. SZ
U 2o16, AND FROM DEEDS AND PLANS OF RECORD. SLOPES HAVE BEEN DETERMINED LESS THAN 25% WHERE INDICATED U Lie. No. 035791 a
PER NEW TOPOGRAPHIC SURVEY AND SLOPES EXHIBIT PROVIDED BY ROUDABUSH, GALE, AND ASSOCIATES DATED MAY o
SCHWARTZMAN JOEL& ZIVA 11/5/21
I r _ 18, zoi7, AS PERMITTED UNDER SECTION 30.7.4(b)(h). Ion
_ I r _ \�, PARCEL:62F-15 1
\ (D.B. 4679, PG. 6 ) 4 TONAL
MANAGED AND PRESERVED STEEP SLOPES EXISTAS SHOWN ON THE PROPERTY. ass PG
/ THERE IS A PORTION OFA WPO STREAM BUFFER LOCATED AT THE SOUTHEAST CORNER OFTHE SITE. E
4 RESIDENCEE 5'
6. THE PROPERTY IS NOT LOCATED WITHIN A DAM INUNDATION ZONE.
I \ _ X A 7. THE PROJECT ZONING IS R-4 AND AIRPORT IMPACT AREA (AIA).
APPROVED35 RCP ENTRANCE CULVERT��\�
;y✓\v
TO DIVERT UPSTREAM ROADSIDE
DITCH UNDER NEW ENTRANCE x /
APPROVED STREET / APPROVED \ �� / \ \ v� A /J MCPHERSON, MICHAEL OR CAROLYN o
WAT. LATERAL V \ � ��ff v �V V "PARCEL: 62F-14 r
TREE(TYPJ \ + (TYP.) \A �` A �. A \� tu.13.32201PG.313) J w
APPROVED SIDEWALK
\ ` \ R-4 RESIDENCE ¢ a
\ //�^ APPROVED -
A -\vim m H
lV �% w /V/ \ SAN.LATERAL / V A �V \ z
y\ \ V)
CITY OF CHARLOTTESVILLE w
_� � � �6�� TYP.) � \ \ � \ Z g
( \ I J
PARCEL: 61-16g / / \/ \ \ \ \ \ \ \ \ i 1 I ` ) \` \ \ O o
ell(D.B. 4622, PG. 523) Q O V A V A\ �` �"� Z�
R-4 ROADWAY & VACANT LAND Q \ t + c > \ \ AV \ a
�L \ � � w
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LLA
CROSS, WHITMAN OR JOY LEVICK Ice
Y16\ V A PARCEL:62F-13
(D.B. 2752, PG. 455)
/ + \ R-4 RESIDENCE
OJ
APPROVED 4' WIDE 1 DEEP V-DITCH \ �468
TO CONVEY UPSTREAM FLOW TO THE STREAM x \ �• x / �L x S �� �� '� V A A �\
WPO STREAM BUFFER �� \ PHASE LINE + /�� \ \ v� A N
r4
00
I X
LEVIN JULIUS OR ETTA
EXITINGEOP�-,,APPROVE D V j A \ /`ii \ PARCEL:62F-1z
WAT. LATERAL APPROVED \ V / \ \ \ (D.B.4o6o, PG. 598)
EXISTING x , \ + (TYPJ 8" WATERLINE \ / \ \\ \ \ J \\ \ R-4 RESIDENCE
PZWLINE ( \�
I
APPROVED
18"YARD DRAIN'B'
\ 1 \ V A \ s/ A / \ \ /
APPROVED � �. A ✓ � \ \ \ � � �i' � � � / i � � / � � M
8" SANITARY (y / \ / \
I �\ M
\ 1 \ SEWER' ` �\ � \ \" / \ / \ � \ \ \ �/ '\ \ \\ Cn
v\Vv\ Ile
i r
RICHARDSON, DAVID OR VICTORIA M
\ \ � PARCEL:6zF-11 �
(D.B.4424, PG. 5og) i
J \ R-4 RESIDENCE
C:) W
��18"YARDDRAIN'A'
I VAR. WIDTH PUBLIC\
�
DUN ORAINVEST ENTS L C DRAINAGE EASEMENT \ \ \ 5
PARCEL: I D.B. PG._ i ����ANEA
\ (0 B. 4967, PGI.169� \ A V k i i ���� � � �1 i )
0-4 RESv\
�DENtIAL V A A X / / �\ � �- \
W L,U 0
V IV I EXISTING SEGMENTAL j V APPROVED
/ ` \ I RETAINING WALL \ APPROVED — 6" WATERLINE \ / r� \ \ PANGS, STEVE OR JOANNE
APPROVED SIDEWALK AND STREET TREES WILL BE // / i /,
REVISED ALONG RIO ROAD IN ACCORDANCE WITH APPROVED MAX HT. = 6' \ SAN. LATERAL \A \ V A / a �/ PARCEL: 62F-10 C)
x� (TYP.) / + ���� W I i \\ A / p '= , i (D.B. 267g PG. 341)
/ RIO ROAD IMPROVEMENT PLAN BY OTHERS. SIDEWALK AND STREET - > > / \ /- `` \ W ^ Z
TREES ON RIO ROAD ARE INCLUDED IN THE SCOPE OF THIS PLAN. T / I \ \ R 4 RESIDENCE L.f_ 0
EXISTING SEGMENTAL \ \ / \ / \\ „ \ I—
I � e
RETAINING VXLL \ W 434 \ / o C9 \ / I / .. \ \> �' U
I I MAX HT. = 6'
\ THESE SLOPES HAVE BEEN DETERMINED LESS THAN 25\ \ \ A �\ \ 7 ��` / A / iA \ •V V / °h-
<� PER NEW TOPOGRAPHIC SURVEY AND SLOPES EXHIBIT PROVIDED BY'\
\ \\ ROUDABUSH, GALE, AND ASSOCIATES DATED MAY 18, 2017, AS + I \ / \ \T \ \ Q
PERMITTED UNDER SECTION 30.7.4(b)(h) \ / ( / X / / A \ r A-e"� \ / \ 0
APPROVED SWM FOREST& �„ \ �� � � � / / � A� � � �\ �V� W ��/
\ V A \ V OPEN SPACE EASEMENTSV V �/ A V / / \ �I L_L (FROM •� V A \ �\ \ i Lu �-
\ ROAD PLAN =1.og ac. MIN.)-
RIO \ (�
RIO ROAD CURB ,- V \A\� / / \ / % Cn U)
/ j / / / 1- APPROVED .. AND GUTTER O \
� — � fir` \� \�� A A � � � / MET � l� J
(BY OTHERS) 'fU / \ \\ \ \ \ \ \� � \\ \� \ _TW yz / \\ / FACILITY/ \ ~ 420
Lu O W
_ / \ W
EXISTING MANAGED \V A _ � � � � � � — � / � - / / / „ � \
\ A \ V / \� STEEP SLOPES \VA V ' ^ / APPROVED SEGMENTAL _ �_ �� / / A\ WILLIFORD, JASON
RETAINING WALL ' ��� s / / s /'
_ �— �G �� OR KWAMINA
\
MAX HIT.=6 PARCEL: 62F 9 % C)
TW 18 \ ��\, ;a/ // \ �'A� / (D B- 3779, PG 329)
N/F i 422- BW 41�/ \ / RESIDENCEW
/ J
LAWRENCE E. MARTIN JR. \ / > i 4 \ \\ 7
WETSEL, THOMAS D LIFE ESTATE, \� \ Ft PARCEL: 61-265C /�
PARCEL: 61-167 \ \ \ \ . \ c9p (D.B. 4552, PG. i5) _ _ZD
(D.B.1688, PG. 564) \ \ 9 - — — ` �426 / — —
V� m. �+ R-4 RESIDENCE � _ � � / � — — - �\\.` � � / � A � 2.�
R-4 RESIDENTIAL
�
RARY GRADING EASEMENT FOR
PUBLIC SETEMPOUPON DEMAND OFTHE COUNTY \\� ��F WILLIAM H. ROGERS JR. &
I \ SHARYON L. ROGERS/_
\ a� PARCEL: 61-i656 _ _
I A Lu
(D.B. 526, PG. 432) \ ��� T - - -_ R a i
- \ �UNLORA�RESfiPROPERTY �� \ F_
\ R-4 RESIDENCE 25' WPO STREAM BUFFER _ - - - - — -- OWNERS ASSOCIATION, INC.__- / I, \ w �-
\ C/O NEST PROPERTY / N/F ; I tu
MANAGEMENT RQBERT,yAIJS 1� 5, C. i
WETSEL, THOMAS D & CLARENCE V� V - / PARCEL: 62F-o1-B / j a m
\ i �� V / -� % , (D 8. 4717, PG. 1g6) JOB NO.
PARCEL:61-.11 / GRAPHIC SCALE \ \ \ R-40PENSPACE A
(D.6.1681, PG.174) � \ \ \ � 152118
R-4RESIDENTIAL
/ N/F VA\ - A y i ;� SCALE
WILLIAM L. SIBLEY VA - n '
STORMWATER , / �/ _ 1 =3O
( IN FEET) PARCEL: �� MANAG CCESS __-
\ / (D.B.2240, PG. 58o) AND MAINTENANCE E �� WF[EELI!0 THOMAS OR MARY \
\ \ inch = 3D ft. R-4 RESIDENCE D.B.4967, PG.133 \ A � — PARCEL: 62F-7 SHEET NO.
_Q$Zy� (.B 3) 2 RESIDENCE
GENERAL NOTES
EROSION CONTROL NOTES
DESCRIPTION OF EROSION &a SEDIMENT
1. THE OWNER/DEVELOPER OF THIS PROPERTY IS:
ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION
CONTROL
MEASURES:
DUNLORA INVESTMENTS, LLC
AND SEDIMENT CONTROL PRACTCES WILL BE CONSTRUCTED AND
455 SECOND STREET SE, SUITE 400
MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF
EROSION AND SEDIMENT CONTROL MEASURES:
CHARLOTTESVILLE, VA 22902
THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA
2. THESE PLANS HAVE BEEN PREPARED BY:
REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL
IT IS ANTICIPATED THAT A CONSTRUCTION ENTRANCE, TEMPORARY DIVERSION
COLLINS ENGINEERING, INC
REGULATIONS
BERMS, RIGHT OF WAY DIVERSION, A SEDIMENT BASIN, SEDIMENT TRAPS, OUTLET
200 GARRETT STREET, SUITE K
ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO
PROTECTION, AND SILT FENCE WILL BE INSTALLED TO CONTROL SURFACE
CHARLOTTESVILLE, VA 22902
TELEPHONE: (434) 293-3719 FACSIMILE: (434) 293-2813
THE PRE-CONSTRUC7ON CONFERENCE, ONE WEEK PRIOR TO THE
DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL
COMMENCEMENT OF LAND DISTURBING AC77WTY, AND ONE WEEK PRIOR TO
3. SOURCE OF TOPO & SURVEY: ON -GROUND SURVEY PROVIDED BY CARDINAL
THE FINAL INSPECTION.
LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WILL BE
SURVEY IN SEPTEMBER 2016, AND FROM DEEDS AND PLANS OF RECORD.
ES-J.-ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR
MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED
4. ZONING: R-4 RESIDENTIAL
TO OR AS THE FIRST STEP IN CLEARING.
AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE
5. TAX MAP AND PARCEL NUMBER: TMP 61-165
ES-4.A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL
AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT
6. USGS DATUM: NAD 83
BE MAINTAINED ON THE SITE AT ALL TIMES.
SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE
7. LOCATION/ADDRESS OF PROJECT: DUNLORA DRIVE
ES-5.-PRIOR TO COMMENCING LAND DISTURBING AC77VI77ES IN AREAS 07HER THAN
8. PROJECT AREA: 8.62 ACRES
INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE
EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT
9. SITE PHASING: PHASE I AND PHASE II, AS SHOWN.
BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A
SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE
10. PUBLIC UTILITIES: WATER & SEWER
SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND
LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL
APPROVAL BY THE PLAN APPROVING AUTHORITY.
DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE
* COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTOR'S WORK,
ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL
PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE
SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND
EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
REGULATIONS. WE SHALL NOT ASSUME RESPONSIBILITY FOR ANY
SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING
CONSTRUCTION STARTED PRIOR TO PLAN APPROVAL.
ES-7.-ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF
MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING
SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED.
EROSION & SEDIMENT
CONTROL
SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
ES-8: DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN
3.01 SAFETY FENCE - SAFETY FENCE WILL BE INSTALLED AROUND THE
APPROVED WATER FILTERING DEVICE.
MEASURES:
ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES
PROPOSED SEDIMENT BASIN.
STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC7CES SHALL BE IN
PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT
3.02 CONSTRUCTION ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE
ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS
INSTALLED AT THE EXISTING DRIVEWAY ON DUNLORA DRIVE. THIS WILL BE THE
STRUCTURAL PRACTICES USED IN THIS SECT70N CONSIST OF THE FOLLOWING.
OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
ONLY POINT OF INGRESS AND EGRESS TO THE SITE. CARE WILL BE TAKEN TO
301 SAFETY FENCE:
EROSION CONTROL NOTES
PROTECT ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT.
A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL
3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF
MEASURE. TO PROHIBIT 774E UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY
1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE
DISTURBANCE WHERE NOTED ON THE PLANS.
THE PUBLIC. APPLICABLE TO ANY CON7ROL MEASURE OR SERIES OF MEASURES WHICH
PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
3.07 INLET PROTECTION - INLET PROTECTION SHALL BE INSTALLED ON EXISTING
CAN BE CONSIDERED UNSAFE BY VIRTUE OF P07EN77AL ACCESS BY THE PUBLIC.
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED
AND PROPOSED STRUCTURES WHERE INDICATED ON THE PLANS.
3.02 CONSTRUC7ON ENTRANCE;
ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND
3.09 TEMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND THE
A STABILIZED PAVED CONSTRUC7ON ENTRANCE WITH A WASH RACK LOCATED AT POINTS
SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND
PERIMETER OF SITE DISTURBANCE WHERE SHOWN ON THE PLANS TO DIRECT
OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE. TO REDUCE THE
SEDIMENT CONTROL REGULATIONS.
AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR
3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS
RUNOFF TO ON -SITE SEDIMENT CONTROL FACILITIES.
RUNOFF. CONS7RUC77ON ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO
THE FIRST STEP IN CLEARING.
3.13 TEMPORARY SEDIMENT TRAP- TEMPORARY SEDIMENT TRAPS WILL BE
REDUCE THE AMOUNT SEDIMENT 7RANSPOR7ED ONTO PUBLIC ROADWAYS.
4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE
INSTALLED WHERE SHOWN ON THE PLANS.
MAINTAINED ON THE SITE A7 ALL TIMES.
305 SILT FENCE.,
5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON
3.14 TEMPORARY SEDIMENT BASIN- TEMPORARY SEDIMENT BASIN WILL BE
A TEMPORARY SEDIMENT BARRIER CONSIS77NG OF A SYNTHE77C FILTER FABRIC STRETCHED
THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS),
INSTALLED WHERE SHOWN ON THE PLANS.
ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND
THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE
3.15 TEMPORARY SLOPE DRAIN- TEMPORARY SLOPE DRAIN WILL BE INSTALLED
DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION
OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY.
OPERA7ONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SIZE AND TO
6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION
DISCHARGING INTO SEDIMENT TRAP #1 IN ESC PHASES II &III.
DECREASE THE VELOCITY OF SHEET FLOWS AND LOW- TO-MODERA7E LEVEL CHANNEL
CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS
3.18 OUTLET PROTECTION- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE
FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH
DETERMINED BY THE PLAN APPROVING AUTHORITY.
PIPES WHERE SHOWN ON PLANS.
MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED.
7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT
3.19 RIPRAP- RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE
THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN
ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL
ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH).
FINAL STABILIZATION IS ACHIEVED.
SHOWN ON THE PLANS.
8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING
3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE
3,07 STORM DRAIN INLET PROTECTION:
DEVICE.
SHOWN ON THE PLANS.
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP
9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND
INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE
AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP
3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE
SYSTEMS PRIOR TO PERMANENT STABILIZA7ON OF THE DISTURBED AREA. INLET
TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE
SHOWN ON THE PLANS.
PROTEC7ON APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL
IMMEDIATELY.
3.38 TREE PRESERVATION AND PROTECTION- TREE PRESERVATION FENCING
BEFORE PERMANENT STABILIZA7ON OF THE CORRESPONDING DISTURBED DRAINAGE AREA.
10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA.
11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL
SHALL BE INSTALLED WHERE SHOWN ON THE PLANS. NO TREES SHALL BE
309 TEMPORARY DIVERSION DIKE:
SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER
HARMED OUTSIDE OF THE LIMITS OF TREE PROTECTION FENCING.
A TEMPORARY RIDGE OF COMPACTED SOIL C0NS77?UC7ED AT THE TOP OR BASE OF A
DEBRIS.
3.39 DUST CONTROL- DUST CONTROL SHALL BE APPLIED THROUGHOUT THE SITE
SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS
12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER
AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO
ZONING ORDINANCE SECTION 5.1.28.
WHERE SHOWN ON THE PLANS.
DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT -TRAPPING
13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF
FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWA7ER
THE CODE OF ALBEMARLE.
STORMWATER MANAGEMENT:
RUNOFF MUST BE TEMPORARILY DIVERTED TO PROTECT DISTURBED AREAS AND SLOPES
14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL
STORMWATER RUNOFF QUANTITY WILL BE TREATED WITH TWO DRY DETENTION
OR RETAIN SEDIMENT ON SI7E DURING CONSTRUCTION. THESE STRUCTURES GENERALLY
BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM.
HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH
15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN
BASINS. STORMWATER QUALITY WILL BE TREATED WITH A NUTRIENT CREDIT
PROPER MAINTENANCE.
MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS,
PURCHASE AND SWM FOREST &OPEN SPACE PRESERVATION. SEE STORMWATER
PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC
313 TEMPORARY SEDIMENT TRAP:
Y SEDIMENT
STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE.
MANAGEMENT PLAN SHEETS AND REPORT FOR DETAILS.
A TEMPORARY G AREA FORMED BY CONSTRUCTING AN EARTHEN EMBANKMENT WITH
16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT
TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION
MAINTENANCE.
A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS
LONG ENOUGH TO ALLOW THE MAJORITY OF 774E SEDIMENT TO SETTLE OUT. USE BELOW
CONTROL MEASURESS REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT,
IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK
DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3
UNIT, BUILDING OTHER PORTION OF THE PROPERTY.
ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH
ACRES, WHERE 7HE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT
17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO
SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF
MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CON✓UNC770N WITH A TEMPORARY
BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A
NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS:
DIVERSION DIKE.
50 50 MIX OF ANNUAL RYEGRASS AND CEREAL WINTER RYE, OR IN MARCH AND APRIL TO
CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF GERMAN MILLET.
a.SEDIMENT BASINS AND TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE
314 TEMPORARY SEDIMENT BASIN.,
STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO
WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK.
A TEMPORARY BARRIER OR DAM WITH A CONTROLLED RELEASE STRUCTURE
APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR.
b.ALL INLET PROTECTION AND GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR
FORMED BY CONS]RUCT)NG AN EMBANKMENT OF COMPACTED SOIL ACROSS A
ACTED OIL
1 PERMANENT STABILIZATION HA E LIME AN FERTILIZER PERMANENT SEEDING, AN
80 SHALL E D E G, D
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS
DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBEDCLOGGED
AREAS
MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF,
BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL
IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR 774E MAJORITY OF THE SEDIMENT TO
INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT
BE REPLACED.
SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE 7HE TOTAL CON7R1BUT7NG
1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL
c.ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR
DRAINAGE AREA IS EQUAL TO OR GREATER IMAM THREE ACRES. 7NERE MUST BE
BE APPLIED AT 180LBS ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND
/
DETERIORATION OF THE FABRIC AND REPAIRED AS RE
REQUIRED. SEDIMENT SHALL
Q
SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONS7RUCT70N OF A
0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED
BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO
7EMPORARY IMPOUNDMENT.
AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION
THE TOP OF THE BARRIER.
CONTROL INSPECTOR.
d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND
J.15 TEMPORARY SLOPE DRAIN:
19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH
IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED.
A FLEXIBLE TUBING OR CONDUIT EXTENDING FROM THE TOP TO THE BOTTOM OF A CUT
RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR
IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD
OR FILL SLOPE. TO TEMPORARILY CONVEY CONCENTRATED STORMWATER RUNOFF SAFELY
IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME
OR CONTRACTOR ON -SITE. THE CONTRACTOR WILL BE DETERMINED AT THE TIME THE
DOWN THE FACE OF A CUT OR FILL SLOPE WITHOUT CAUSING EROSION ON OR BELOW THE
IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY
CONTRACT IS AWARDED. IN ADDITION THE DEVELOPER MAY BE CONTACTED. UPON
SLOPE. USE ON CUT OR FILL SLOPES WHERE THERE IS A P07EN77AL FOR UPSLOPE
TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE
COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE
FLOWS TO MOVE OVER 7HE FACE OF THE SLOPE CAUSING EROSION AND PREVENTING
COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED
IMMEDIATELY
MAINTENANCE.
ADEQUATE STABILIZATION.
20.ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED
J.18 OUTLET PROTECTION:
WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED,
STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPATING DEVICES
SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR.
PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS TO PREVENT SCOUR
21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF
1. SET POSTS AND EXCAVATE A 4X4°
AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE
THE DATE OF APPROVAL. (WATER PROTECTION ORDINANCE SECTION 17-204G.)
TRENCH UPSLOPE ALONG THE LINE
POTEN7IAL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF
22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9)
OF POSTS.
CONCENTRATED STORMWA7ER FLOWS APPLICABLE TO THE OUTLETS OF ALL PIPS AND
MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER
ENGINEERED CHANNEL SEC77ONS
PROTECTION ORDINANCE SECTION 17-207B)
J. 19 RIPRAP:
A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE
SOIL DESCRIPTIONS
1
j
WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE
I
EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCEN7RATED
2C- ALBEMARLE FINE SANDY LOAM - 7% TO 15% SLOPES.
�
G
RUNOFF WHILE ENHANCING THE POTENTIAL FOR INFIL7RA770N, AND TO STABILIZE SLOPES
SOIL CONSISTS OF DEEP, WELL DRAINED SOILS. SURFACE RUNOFF IS MEDIUM TO LOW
I
WITH SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND
WITH MODERATELY HIGH PERMEABILITY. HYDROLOGIC SOIL GROUP Cl.
WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY,
21B- CULPEPERFINE SANDY LOAM -2%TO7%SLOPES.
EXPECTED VEGETA7VE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE
SOIL IS DEEP, WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM
DESIGN FLOW CONDITIONS.
WEATHERED FROM META-ARKOSIC SANDSTONE. HYDROLOGIC SOIL GROUP'B'.
-
331 TEMPORARY SEEDING
39D- HAZEL LOAM -i5DATO25%SLOPES.
/J�
FLOW II -.-III
THE ESTABLISHMENT OF A TEMPORARY VEGETATIVE COVER ON DISTURBED AREAS BY
SOIL IS DEEP, WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM
4
SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION
WEATHERED FROM GREYWACKE SANDSTONE. HYDROLOGIC SOILGROUP'B'.
AND SEDIMENTA7ON BY STABILIZING DISTURBED AREAS THAT WILL NOT BE BROUGHT TO
FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS. TO REDUCE DAMAGE FROM
SEDIMENT AND RUNOFF TO DOWNSTREAM OR OFF -SITE AREAS, AND TO PROVIDE
PRUILGIION IU HAHL SU/LS LXPUSLU UURING CUNSIHUCIIUN UNTIL HERMANENI
VEGETAT70N OR 07HER EROSION CONTROL MEASURES CAN BE ESTABLISHED.
332 PERMANENT STABILIZATION:
THE ESTABLISHMENT OF PERENNIAL VEGETATIVE COVER ON DISTURBED AREAS BY
PLANTING SEED. TO REDUCE EROSION AND DECREASE SEDIMENT YIELD FROM DISTURBED
AREAS. TO PERMANENTLY STABILIZE DISTURBED AREAS IN A MANNER THAT IS
ECONOMICAL, ADAPTABLE TO S17E CONDITIONS, AND ALLOWS SELEC7ON OF THE MOST
APPROPRIATE PLANT MATERIALS. TO IMPROVE WILDLIFE HABITAT. TO ENHANCE NATURAL
BEAUTY. UPON COMPLE77ON OF CONSTRUCTION AC771,777ES, ALL AREAS WILL RECEIVE A
PERMANENT VEGETA7VE COVER.
338 7REE PRESERVA77ON AND PRO7ECT7ON.,
PROTEC77ON OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND
DISTURBING AND CONSTRUCT70N AC770TY. TO ENSURE THE SURVIVAL OF DESIRABLE
TREES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL,
WATERSHED PROTECTION, LANDSCAPE BEAUTIFICATION, DUST AND POLLU77ON CONTROL,
NOISE REDUCTION, SHADE AND OTHER ENVIRONMENTAL BENEFITS WHILE THE LAND IS
BEING CONVERTED FROM FOREST TO URBAN -TYPE USES. APPLIES IN 7REE-INNAB17ED
AREAS SUBJECT TO LAND DISTURBING ACTIVITIES.
339 DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DIS7TRBING, DEMOLITION
AND CONSTRUCTION ACTIVITIES. TO PREVENT SURFACE AND AIR MOVEMENT OF DUST
FROM EXPOSED SOIL SURFACES AND REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES
WHICH MAY PRESENT HEALTH HAZARDS, TRAFFIC SAFETY PROBLEMS OR HARM ANIMAL OR
PLANT LIFE. DUST CONTROL MEASURES SHALL BE EMPLOYED TO PREVENT SURFACE AND
AIR MOVEMENT OF DUST DURING CONSTRUCTION. MEASURES EMPLOYED SHALL BE IN
ACCORDANCE W77H 774E VESCH.
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PAVED WASH RACK
AO SCA,E
PERSPECTIVE VIEW PERSPECTIVE VIEW
PLASTIC FENCE METAL FENCE
SDurDe: Adapvd Gom (I)GUrniond Fund. End
VDOT Road and Hr'dee Slnmlatda
IR-S
Pink 3AI-I
2. STAPLE WIRE FENCING TO THE POSTS.
SIL T FENCE
sF (WITH WIRE SUPPORT)
NO SCALE
La
T
L SECTION A A
P/PE OUTLET TO FLAT AREA WITH NO DEFINED CHANNEL
La
C
' PLAN
SECTION A -A
GP PIPE OUTLET CONDITIONS
NOSCALE
THE PURPOSE OF THIS LAND -DISTURBING ACTIVITY IS TO GRADE THE SITE FOR THE DEVELOPMENT OF DUNLORA.
THE TOTAL ACREAGE TO BE DISTURBED WITH THIS PLAN IS 7.53 ACRES.
EXISTING SITE CONDITIONS:
THE EXISTING SITE IS A WOODED, SLOPING PARCEL WITH AN EXISTING RESIDENCE AND OUTBUILDINGS. THE SITE IS
GENERALLY WELL DRAINED WITH PRESERVED AND MANAGED STEEP SLOPES. EROSION AND SEDIMENT CONTROL
MEASURES HAVE BEEN DESIGNED TO CONFORM TO THE EXISTING SITE SLOPE AND PROTECT THE PERIMETER
STREAMS AND ADJACENT PROPERTIES.
ADJACENT AREAS:
THE SITE IS BOUNDED TO THE WEST BY DUNLORA DRIVE AND TO THE SOUTH BY RIO ROAD EAST. IT IS
BORDERED BY RESIDENTIAL LAND AND TWO CREEKS TO THE NORTH AND EAST.
OFFSITE LAND DISTURBANCE:
NO OFF -SITE LAND DISTURBANCE IS PROPOSED.
CRITICAL AREAS:
MANAGED STEEP SLOPES TO BE IMPACTED. STREAMS AND BUFFERS TO BE PROTECTED. WOODLAND/OPEN
SPACE PRESERVATION AREAS TO BE MAINTAINED AND PROTECTED WITH TREE PROTECTION FENCING.
SOILS:
SEE SOILS BOUNDARIES ON THE EROSION AND SEDIMENT CONTROL PLAN SHEET, AND DESCRIPTIONS ON THIS
SHEET.
SEQUENCE OF CONSTRUCTION:
1. NOTIFY ALBEMARLE COUNTY TO SCHEDULE A PRE -CONSTRUCTION MEETING AS REQUIRED.
2. NO EROSION CONTROL MEASURES MAY BE REMOVED DURING THE CONSTRUCTION PROCESS WITHOUT THE
APPROVAL FROM THE INSPECTOR ON THE PROJECT.
3. CONTRACTOR SHALL IDENTIFY THE LIMITS OF DISTURBANCE AND INSTALL TREE PROTECTION FENCING WHERE
INDICATED ON THE PLANS BEFORE ANY SITE DISTURBANCE SHALL TAKE PLACE. CONTRACTOR SHALL ENSURE
THAT TREES TO BE SAVED ARE FLAGGED ALONG THE LIMITS OF CLEARING AND PROTECTED.
4. INSTALL THE PAVED CONSTRUCTION ENTRANCE WITH WASH RACK AS SHOWN ON THE PLANS. CONSTRUCTION
ENTRANCE TO BE INSTALLED WHERE CONSTRUCTION VEHICLE ROUTES INTERSECT PAVED PUBLIC ROADS,
PROVISIONS SHALL BE MADE TO MINIMIZE THE TRANSPORT OF SEDIMENT BY (VEHICULAR) TRACKING ONTO
THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PUBLIC ROAD SURFACE, THE ROAD SHALL
BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE ROADS BY
SHOVELING OR SWEEPING AND TRANSPORTING TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING
SHALL BE ALLOWED ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. INSTALL THE WASH RACK UPHILL
FROM THE PROPOSED SEDIMENT BASIN. ACSA WILL DETERMINE THE APPROPRIATE METHOD OF SUPPLYING THE
WASH RACK. PARKING AND CONSTRUCTION ENTRANCE AREAS SHALL BE CLEARED OF ALL VEGETATION,
ROOTS, OR OTHER OBJECTIONABLE MATERIALS BEFORE CONSTRUCTION ROAD STABILIZATION IS INSTALLED.
5. CONTRACTOR DOES NOT HAVE PERMISSION TO CLEAR CUT THE SITE PRIOR TO INSTALLING THE PERIMETER
MEASURES AS SHOWN ON THE E&S PLAN. CONTRACTOR SHALL EXPEDITE INSTALLATION OF THE PERIMETER
EROSION AND SEDIMENT CONTROL MEASURES AND PROTECT THE SITE WITH THE LEAST AMOUNT OF TREE
REMOVAL NECESSARY TO INSTALL THESE MEASURES. INSTALL THE INITIAL CONSTRUCTION MEASURES AS
SHOWN ON THE PHASE I EROSION CONTROL PLAN SHEETS. THIS INCLUDES THE SEDIMENT TRAPS, THE
SEDIMENT BASIN, SILT FENCE, DIVERSION BERMS AND THE TEMPORARY SLOPE DRAIN. STABILIZATION
MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, BERMS, AND DIVERSIONS
IMMEDIATELY AFTER INSTALLATION. MEASURES INTENDED TO TRAP SEDIMENT SHALL BE CONSTRUCTED AS A
FIRST STEP WITH ANY LAND DISTURBANCE ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE
LAND DISTURBANCE TAKES PLACE.
6. INSTALL ANY REMAINING EROSION CONTROL ITEMS AS SHOWN ON THE PHASE I EROSION CONTROL PLAN.
7. ONCE ALL THE EROSION CONTROL ITEMS HAVE BEEN INSTALLED AS SHOWN ON THE PHASE I EROSION
CONTROL PLAN AND THE INSPECTOR HAS APPROVED THE EROSION CONTROL MEASURES, THE CONTRACTOR
CAN BEGIN GRADING OPERATIONS.
8. ROUGH GRADE THE SITE TO THE CONTOURS SHOWN ON THE PHASE 11 EROSION CONTROL PLAN AND INSTALL
THE PROPOSED STORM PIPE ADJACENT TO DUNLORA DRIVE WITH INLET AND OUTLET PROTECTION.
9. PERMANENT OR TEMPORARY SOIL STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN SEVEN DAYS
AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY SOIL STABILIZATION SHALL BE
APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN
DORMANT (UNDISTURBED) FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO
AREAS THAT ARE TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
10. INSTALL PHASE III CONTROLS. SEE SHEET 5A FOR A MORE DETAILED SEQUENCE OF CONSTRUCTION FOR
PHASE II OF THIS DEVELOPMENT (LOTS 29-34 & ITS INFRASTRUCTURE).
11. ONCE THE SITE IS STABILIZED AND THE INSPECTOR HAS GIVEN APPROVAL, THE CONTRACTOR CAN CONVERT
THE SEDIMENT BASIN AND SEDIMENT TRAP 1 INTO PERMANENT STORMWATER MANAGEMENT FACILITIES. AT
THIS TIME THE REMAINING PORTION OF THE ALLEY AND LOTS 33 & 34's DRIVEWAYS MAY BE INSTALLED. NO
E&S ITEM SHALL BE REMOVED UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE INSPECTOR GIVES
PERMISSION.
12. MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA EROSION AND SEDIMENT CONTROL
HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE
WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
13. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER
FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED UNLESS
OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED
SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY
STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION.
FILTER FABRIC
ENTRENCHED e'
CORPACTIRD BOIL B 11Q7➢Inll ------ - I'
-1jj=1111`II I I � T`
_ I _-1TI-T�1TkHTkHTI-I�
10' 10• T11�7_ IIrIILI�-�IE911
ga",.,�E
g• --
DD TEMPORARY 18" DIVERSION BERM
3 ATTACH THE FILTER FABRIC TO
THE WRIT FENCE AND EXTEND
IT INTO THE TRENCH.
� /IIII-III-
305-2
4. BACKFILL AND COMPACT THE
EXCAVATED SOIL.
FLOW G
r
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
TABLE 3. ,k
ADHESIVES USED FOR DUST
CONTROL
Wean
APPhoadon
AWN..
.ohoupoo
AtlLeFre WaL•1
T, a
NEGS,
Rem
Aawm,
AyM1alt Emulsion
71
Coarse Sprry
law
I,Ae Emuhmn
125:1
Fine Sprq
735
Ron.. in Wam,
41
M. SRI
3W
Aaylie Emultion
(NomTaRr)
7:1
C.-S"
450
Ap Tit EmuIYW
(Traffic)
35:1
Cb c Sp,q
350
5wrtt: Va03WC
Sh
SLI
TABLE 331-B
ACCEPTABLE
TEMPORARY SEEDING PLANT MATERIALS
'QUICK REFERENCE FOR ALL REGIONS'
Rate
Planting Dates
SKcies
bs. acre
Sept. 1 - Feb. 15
50150 Mix of
Annual Ryegrass
(Lolium multi-flomm)
&
50 - 100
Cereal (Winter) Rye
(,Secale cereale)
Feb. 16 - Apr. 30
Annual Ryegrass
(LOlium multi-florum)
60 - 10D
May 1 - Aug 31
German Millet
(&Iada italics)
50
Source: Va. DSWC
TOTAL LBS
GENERAL SLOPE (3:1 OR LESS) PER ACRE
KENTUCKY 31 FESCUE 128 LBS.
RED TOP GRASS 2 LBS.
SEASONAL NURSE CROP 20 LBS.
SEASONAL NURSE CROP 150 LBS
FEBRUARY 16 THROUGH APRIL ANNUAL 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.)
Ip SILT FENCE DROP INLET
PROTECTION
DROP T T.IAA:E
WN lsll[
GATHER
I I I ni`covmu
PERSPECTIVE VIEWS
F.aR1� s*�yy'a ��Li
ELEVATION OF STAKE AND
FABRIC ORIENTATION DETAIL A
SPECIFIC APPWCATION
THIS METHOD OF INLET PROTECPION IS APPHCA3LE WHERE THE
INERT DRAINS A RELATIVELY FLAT AREA (SLOPE NO GREATER
THAN 5%) WS6RE THE INLET SHEET OR OVERWND FLOWE (NOT
EXCEEDING 1 C F.S-) ARE TYPICAL THE METHOD SHALL NOT
APPLY TO INLET'S RECEIVING CONCENTRATED FLOWS. SUCH AS
IN STREET OR HIGHWAY MEDIANS.
0
CONCRETEBLOCK
GRAVEL * FILTER
OR#5COARSEAGGREGATE.
O BLOCK & GRAVEL CURB INLET O
SEDIMENTFILTER 3.07-8
NO SCALE
ON SLOPES, STRIPS
N 7EC77VE COVERINGS
Im
Saa.ce: Va. DESIRE
ALBEMARLE COUNTY
CONSTRUCTION ENTRANCE
338
Plate 33Ea
. - PLAN VIEW
sm3T mwo M. OF
MCPE55 MU EtltRS RMAUEN
SEit 1/Y 0A1EA
HMPIM "M rums,
Ym�
p11ttf MMA.W, Y
�1a'
ABJNE matt u" .
IFF FCm a vAwlrxT.
SECTION A -A
NOTE: A MNWN RATER POP CF I- Is IKYmED
MIM A MI111WR1 RASH MIX W. W I.R.
rTOrexAoIHio+�T
+fA)x7s TEMP COW ENTR
9 scar CE
.1.
aFAPATEDS FT4 TFEAGi
SILTFENCE
sF (WITHOUT WIRESUPPORT) 3.D5-z
s�aEz
MAY BE APPLIED ACROSS BERM
THE SLOPE.
BRNG THEE MATERIALBERM
OV RA HTHE
BERM AND ANCHORIf IiK
BEHIND THE BERM.
-lu I�iN I�TI'=IIT�I I L I
BRING MATERIAL DOWN TO A LEVEL AREA BEFORE STEEP
TERMINATI(yG THE INSTALLATION„ TURN THE END SLOPE
UNDER 4 AND STAPLE AT 12 INTERVALS. '
12"
ARALLEL DITCHES HEYDRECTON 0 COVERING
USE
0 NINGEMATERIALSIN TH£ ENTER AVOID
F I D
THE DITCH IF AT ALL POSSIBLE.
PR0f*%E COVERING PARALLEL
TO THE DIRECTION OF FLOW
AND ANCHOR SECURELY.
8SOIL STABILIZATION BLANKET NO
TE.••
TREATMI SOIL STABILIZATION MATTING MATERIAL SHALL BE INSTALLED AS
NOSCALE REQUESTED BY THE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR
SCOTT/R. Cb`LLIN:
Lic. No. 035791
' 11/5/21
N
CD
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JOB NO.
152118
SCALE
N/A
SHEET NO.
3
1 CONCRETE WASH . 0 ■ ■ 0 m u m ■ ■ � NOTE: LEGEND LEGEND
OUT AREA ♦ i. TOTAL LIMITS OF DISTURBANCE PROPOSED WITH THIS PLAN = 7.53 ACRES.
WASH RACK .� SF -- \ PROPERTY LINE (TYP.) z. THE LIMITS OF DISTURBANCE SHALL BE CONCURRENT WITH THE PROPOSED LIMITS OF LAND DISTURBANCE SAF SAFETY FENCE PER VESCH 3.01
T�P ---- TREE PROTECTION FENCING. FENCING AND LOD SHOWN SEPARATELY IN THIS DIVERSION DIKE CE CONSTRUCTION ENTRANCE PER VESCH 3.02
x PLAN FOR GRAPHICAL PURPOSES ONLY. NO DISTURBANCE IS PERMITTED BOUNDARYLINE
h 1 1 OUTSIDE OF THE LO o o SILT FENCE SF SILT FENCE PER VESCH 3.05
A L'
DIRECTION OF FLOW IP INLET PROTECTION PER VESCH 3.07
� I 653.75 PROPOSED CONTOUR O
I \
- 1 DRAINAGE DIVIDE DIVERSION DIKE PER VESCH 3.09
I
IAP VED SOILS LINE
- — —. — —_ - —
X 7c MIN.
IL
MANAGED S
�� STz i V ` �.. �_ — \ SB SEDIMENT BASIN PER VESCH 3.14
\ LOPES
OUTLET PROTECTION PER VESCH 3.18
•�. PRESERVED SLOP BO SOIL STABILIZATION MATTING VESCH 3.36
f ° o
����■������ a� �\ V \� A\ EAM BUFFER
OPEN SPACE PRESERVATION
CIP
LOCATION OF
FUELING AREA
APPROVED VDOT EC-1 CLASS Ai RIPRAP - LOCATION OF / TYP W/FILTER FABRIC OUTLET PROTECTION - LOCATION OF PORT -A -POTTY . i
QIO=o.53 CFS - DUMPSTER /� \
VIO-2.61FPS - V
WI=3x1 z�5 3 �
75� - �s � DC / _ FLOW DIRECTION ARROW (TYP.)
W2=5'+1.25 6.25' 4—
—SOIL
TYPE
' 21 1 V A \
SOIL
39p / sb \ \ \ \ \\♦
l
� CE \
\ \ \ SB 1 s \ ,/EXISTING PRESERVED I
12'x70' MIN. x
Area=5.3i ac. S \ . �\`.. STEEP SLOPES (TYP.)
a•
� —c\ � � �
• DD ��� . CW-- O. �
- CONTRACTOR SHALL INA L OUNTABLE`
RWDRIGHT-OFWAY DIVERSION W LATHE ` A P TC=1 .2MINN.
IP I� CONSTRUCTION OF PHASE II O:THIS \
o DEVELOPMENT. THE MOUNTABLE DIVERSIONBERM
EACH
PR1RESTORED AT THEfND� / / / / \�
-� \ EACH DAY&PRIOR/Tp WEATHER \E�VTS. �� \ I� / / / /
Lic. No. 035791
12/13/21
a
0
U
c
0
U
0
c
PROPOSED DIVERSION BERM.
CONTRACTOR SHALL ENSURE \ ��
POSITIVE SLOPE MAINTAINED A
' APPROVED VDOT EW-1 \
18" BERM PROVIDED. BERM /
SHALL BE STABILIZED AS A FIRST DD l & VDOT EC-i M
STEP IN DISTURBANCE, TYP. 1,�CLASS 1 RIPRAP
W/FILTER FABRIC 8 CFSOIL TY
/ J \
IOUTLET PRO I ECTION S� e / �� PE / \ \ N V t TP 4� Vio Io.3 FPS�/ \ �\ p
Q L-8'; D 2.5 / \ 39 / ♦ \.
. F \ w1 3x1.25' 3.75' \ \ \ \
\W2 8+1.25=9.25'
OP
\ \
z
\ \� %PROVED OT STD'.'T/YPE I \ / `-� \
Cv 31'OF 0i5'"HEAVY-bUTY, �IN
RI PRAP LIiV� CPIANNSe w/ �� / / / �` �`( / 0 LU
j FLEXIBLE PIPE TO Off- �B \ GEOT�TILE F4 TER FABRIC \ \ "� '
�\ CONVEY RUNOFF FROM � �� UNDERL Y EN CHANNEL / t \ N Q
\ M
RRoroseo I DIVERSION TO RIPRAP �- - 3 EXTD T2�STREAM
BTOC ALL AREA \
SILT FENCE : E& APPROVED NIA=4a'� SHALL BE LINED OUTL
'suRRouNoea By i • PROTECTION
\ � R PRAP \ 5\ vQ J
SEDIMENT TRAP tFi NO SCA[E __ 'y D `` / z O .
\ A OP W W
♦ \ / //�/i�, \ J
V IP. A APPROVED VDO E c�-1 C.L. I KINKr.
EXISTING MANAGED � � I � \ J 2: Z
°
. A STEEP SLOPES (TYP.) �� �� l e WI y 5'; W2 13 5 Liz'; D=2.5'
A\\\\lDIVERSIONBERM.\
CONTRACTOR SHALL ENSURE \ \ W
POSITIVE SLOPE MAINTAINED, \ ~ W
18" BERM PROVIDED. BERM \\ O z
�,�� SHALL BE STABILIZED AS \
APPROVED DIV SIGN BERM. ---_ ` / / \ J V 1
/L9
CONTRACTORALL ENSURE FIRST STEP IN DISTURBANCE �\ \ 0
\ \ APPROVED \ iPOSITIVE SLO E MAINTAINED, \ Q
�P \ T �.� -- - - 18" BERM PROVIDED. BERM W
BE STABILIZED AS \ V \
FIRST STEP IN DISTURBANCE \V A �A V U 06
\\\ �♦ V �/ ��\ 1 p
V PHASE I
\ :
STi PS \ Lu � U
/ _ \ / I Z 2 \ DC '
A AREA=o.77 ac. . �� A 43 � � � � � � I ,
A Cw=o.35 - SAF \ s_ \ — / � // I W 0
\ \ Tc=SMIN. � � \� + \\\�TO D � \ � ;\ � \ y- �/ \ �\ ) y �j III \ \ \ (n W
\ \ V\ I tic - ♦ '� V� ��\V���\� V ��� v — — TS �Z / /� �,/ V V A ,_.._I
DC
Lu
O
ZD- —
DF
LIMITS OF DISTURBANCE, TYP., TOTAL
AREA=7.53 ac.TREE PROTECTION SHALL BE — * - _- __ 61 n� C)
PLACED ON LOD LINE IN FIELD N
0
U
Lu
\ - O '
w
�j z5' STREAM BUFFER - _ ---
\ GR�PHIC SCALE \ y - - —_ — SAF v �� NO.
, v
30 15 �0 60 120 � � \ � -- --
I
8
SCALE
(SIN FEET
N N N
m Ln M
N
N
1 inch = 30 ft.
v
CONCRETEWASH AREA
W(SF'
■ ■ ■ ■ ■ ■ ■ ■ ■ ■�
----------
SH RACK �� '� TP — PROPERTY LINE (TYP.)
x ■
x I
1
j C �AP VED x TP
12'x7o MIN. l� STz
■ 1
� a a
- LOCATION OF
- FUELING AREA
LEGEND
LEGEND
LIMITS OF LAND DISTURBANCE
SAF SAFETY FENCE PER VESCH 3.01
DIVERSION DIKE
CE CONSTRUCTION ENTRANCE PER VESCH 3.02
BOUNDARY LINE
SILT FENCE
SF SILT FENCE PER VESCH 3.05
DIRECTION OF FLOW
IP INLET PROTECTION PER VESCH 3.07
653.75
PROPOSED CONTOUR
■ ■ ■ ■ ■ ■
DRAINAGE DIVIDE
DD DIVERSION DIKE PER VESCH 3.09
SOILS LINE
SB SEDIMENT BASIN PER VESCH 3.14
MANAGED SLOPES
OP OUTLET PROTECTION PER VESCH 3.18
PRESERVED SLOP
BL SOIL STABILIZATION MATTING VESCH 3.36
EAM BUFFER
OPEN SPACE PRESERVATION
NOTE: TOTAL LIMITS OF DISTURBANCE PROPOSED WITH
Lic. No. 035791
12/13/21�
THIS PLAN = 7.53Ln
ACRES.
APPROVED VDOT EC-i CLASS Al RIPRAP _- z - 7 LOCATION OF
W/FILTER FABRIC OUTLET PROTECTION LOCATION OF PORT -A -POTTY '
0:10=0.53 CFS DUMPSTER i 0
Vio-z.63. FPS - - b� �� �� �� S A �� Q ¢ Q
Wi=3x3.25' 3.75' � �, r w DC /�� co H F�-
Wz=S'+i.z5-6.z5' o � � / �� � � w w
T HLIN- a O O
` \S SH ET O r u u
j \ z Lu Lu
N
Lu
--
. e
PROPOSED DIVERSION BERM.
CONTRACTOR SHALL ENSURE % ------__ -
POSITIVE SLOPE MAINTAINED,
18"BERM PROVIDED. BERM SHALL
SHALL BE STABILIZED AS A
FIRST STEP IN DISTURBANCE \ CE V /��j
/ /
� - EXISTING PRESIRVEC i
°
\ 12'x70' MIN. S m in
�_ STEEP SLOPES (TYP.) �
pD � A A IP .o � °• • ° 00
-458
CONTRACTOR SHALL INSTAL OUNTABLE IP �� BASE II — -� /
—
■ � RWD RIGHT-OF-WAY DLVERSION W .THE � % TP�10
AM BUFFER
CONSTRUCTIONOFF HE.IIOFTHIS E`a=5.31 aC.
DEVELOPMENT. THE MOUNTABLE DIVERSION \� I CW=o.65 � � /
S' BERM SHALL@E RESTORED ATTHE END OF \ v \ \ \ \
/ v ��� \
� o � EACH DAY &PRIOR- - WEATHER EVENTS. y I I' / .�TC=10.H MIN. \ \ \
/ - / �- - \ Cn
\
APPROVED a Lu DOT EW� � � \ � � � � � � A, \ � � �
& VDOT EC-3. \ /
CLASS i RIPRAP
W/FILTER FABRIC a
�� ■ /� OUTLET PROTECTION
\ V� Qio=i.8 CFS
I TP ■ 40 � A, Vio io.3 FPS
♦ \AA \
L=8'; D z.5 C'7
TS SF ■ � �\ 2=8+1.25'=g.25'/
■ 32' OF 0i5" HEAVY- DUTY, A \ /
FLEXIBLE PIPE TO �� W Q
CONVEY RUNOFF FROM
RRORoseD I ■ DIVERSION TO RIPRAP
STOCKPILE AREA. A / / /
Srrn��BE ( LINED OUTLET, APPROVED A _
SURROUNDED. BY PROTECTI
SILT FENCE SEDIMENT TON & ``�j
RIPRAP �^ \ V / / ��
- W RgP#i .
( D \ NO SCALE \\ \ / - � D 8. • � 1
■ }4` �� v v / w
e
°
/APPROVED VDU i tC i tL I PiII
EXISTING MANAGED
\ \\ i. Wi=4 5; Wz i3 5 Liz D z.5'
STEEP SLOPES(TYPJ \ ,�
\ a �/
_ A y �' �/� i
s \ \pRIVEDBERM.� W
C
°CONTRACTORSHALL ENSURE
'�
I
'' ) Y° ' _ - \ IP •" z \ `�, POSITIVE SLOPE MAINTAINED, \ ~ z
�S 2 � _ ��/ / , � 4 a8"BERM PROVIDED. BERM - � � W
ZED AS A 0
\ — A V l W / / v. -IRST STEP IN DISSHALL BE TURBANCE
ANCE \
AI2a�0.77 aC. APPROVED°\ \ TS �� �/ �/ / /� \ > in
CW=0.35 T \ \o \ \ _ / /// \ �� Z = U7
Tc=5 MIN. � C) 0 65
` z
/ Ps �_ • \ / /2� w r-I
2 �
— -- ♦ _
. W �
TO
DC- Tul F—
S � i
A
Lu
�� m TS t V A \\ A
�\ \VA
(n
\ T v A\� �� _ — _ — — -- — _ --- y_, ♦ �� F- a
w
ZD
-- -
I
SF LIMITS OF DISTURBANCE, TYR., TOTAL _ 0
AREA=7.53ac.TREE PROTECTION SHALL BE " ------ -- !*- \
PLACED ON LOD LINE IN FIELD - - i "fix --_ _ 0
---
d
� i w
F-
-
\ U
W
0 W
hj 25' STREAM BUFFER
GRAPHIC SCALE \ — - - _ / JOB NO.�
- - \
� v 30 ,s aD sD ,zD � � � � � _ � — SAF 15211
_ 8
SCALE
( IN FEET) V �� �. A� _ ,/. — Iu _ 30'
1 inch — 30 Pt.—
�
CONCRETE WASH ESC PHASE III SEQUENCE OF CONSTRUCTION FOR PHASE II OF THIS DEVELOPMENT (LOTS 29-34 & ITS INFRASTRUCTURE):
OUTAREA y 1. THE CONTRACTOR SHALL BEGIN THE PHASE II (LOTS 29-34 & ITS INFRASTRUCTURE) ESC PHASE III BY MODIFYING THE CONSTRUCTION ENTRANCE. THE
WASH RACK it . P - �.�� PROPERTY LINE (TYP.) CONTRACTOR SHALL MAINTAIN THE ESC PHASE II DOWNHILL DIVERSION AS LONG AS POSSIBLE. THIS WILL ENSURE DISTURBED AREAS ARE DIRECTED
---- _ - INTO SEDIMENT TRAP #1 DURING THE INITIAL PHASE III GRADING OPERATIONS.
2. IF FILL DIRT IS REQUIRED TO BE IMPORTED TO THIS SITE, OUTSIDE OF THIS PROJECT's PERMITTED AREA, THEN IT SHALL BE OBTAINED FROM AN O _�,
1 APPROVED PROVIDER OR SHALL ORIGINATE FROM A BORROW SITE THAT IS COVERED UNDER A SEPARATE VSMP PERMIT. SCOTT�R. C LINS'Z
3. DURING THIS ESC PHASE III, THE CONTRACTOR CAN BEGIN EXPANDING THE GRADING AND FILLING OPERATIONS. WHILE THE GRADING IS UNDERWAY CD
THE CONTRACTOR CAN BEGIN INSTALLING THE PHASE II (LOTS 29-34) UTILITIES. THIS INCLUDES WATER, SANITARY SEWER AND STORM SEWER. THE U Lic. No. 035791 a
I PORTIONS OF THE PHASE II STORM SEWER SYSTEM INSTALLED WILL BE BLOCKED DURING ESC PHASE III TO ENSURE RUNOFF IS DIRECTED INTO 12 13 21
- I SEDIMENT TRAP #1. THIS WILL CONTINUE TO ENSURE DISTURBED AREAS ARE TREATED IN SEDIMENT TRAP #1. ASA BACKUP PLAN AT ANY POINT
�C — �TP
I APPROVED . _ DURING CONSTRUCTION THE ESC INSPECTOR RESERVES THE RIGHT TO REQUIRE THE ACTIVATION OF THE PHASE II YARD DRAINS AND STORM SEWER. ;fig Cs1
lz'x7o MIN. STz / -�. �„ \ — THE ACTIVATION OF THESE INLETS WILL DIRECT RUNOFF INTO APPROVED SEDIMENT BASIN #1. PRIOR TO THE CLOSING OF THE PROJECT, THE SIONAL E�
CONTRACTOR SHALL CLEAN THE STORM SEWER AND CONFIRM ITS STRUCTURAL INTEGRITY WAS MAINTAINED. ALL INLET PROTECTION SHALL BE
. • ° ° ° ° •�♦ \ \ I I X \ \ INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRS SHALL BE MADE AS NECESSARY. IF THE STONE FILTER BECOMES CLOGGED WITH SEDIMENT SO
THAT IT NO LONGER ADEQUATELY PERFORMS ITS FUNCTION, THE STONE MUST BE PULLED AWAY AND CLEANED AND/OR REPLACED.
4.
V ��■ �� \ v WITHTHEINSTALLATION OFTHE SITE UTILITIES DRAINAGE STRUCTURES ALREADY UNDERWAY THECONTRACTOR HALLCONTINUE THEE
\ INSTALLATIONS AND CAN ROUGH GRADE THE LOTS AND THE ALLEY UP TO SEDIMENT TRAP # 1's 2:1 TIE-IN GRADES. ONCE THE BULK OF THE ALLEY IS
AT ROUGH GRADE, THE CONTRACTOR SHALL INSTALL THE CURB, TERMINATING IT AT SEDIMENTTRAP #1's 2:1 TIE-IN GRADES AS SHOWN. INSTALLING
THE CURB IN THIS MANNER WILL ALLOW IT TO FUNCTION AS A DIVERSION, DIRECTING UPLAND RUNOFF INTO ATEMPORARY SLOPE DRAIN AND
♦♦ \ '� \ ULTIMATELY SEDIMENT TRAP #1. ANY ESC MEASURES THAT ARE DISTURBED WITH THE INSTALLATION OF THE ALLEY SHALL BE RECONSTRUCTED AT
♦ THE END OF EACH DAY TO ENSURE THE SITE IS PROTECTED FROM RAINFALL EVENTS.
/ ♦ y 5. ONCE THE MAJORITY OF THE SITE IS CLEARED AND ROUGH GRADED, MINUS THE SOUTHERN PORTION OF THE ALLEY, THE CONTRACTOR SHALL
�. LOCATION OF ° �V �� TEMPORARILY STABILIZE THE UPLAND AREAS ON THE SITE WITH TEMPORARY SEEDING AND STRAW MATTING. THE CONTRACTOR CAN ALSO BEGIN TO
N N
FUELING AREA � � � � � � � ♦♦♦� � �
� CONSTRUCT THE RESIDENTIAL BUILDINGS ONCE THE LOTS ARE AT ROUGH GRADE. m N
LOCATION OF V \� 7. UPON PERMISSION AND AUTHORIZATION FROM THE ESC INSPECTOR, THE CONTRACTOR MAY BEGIN THE CONVERSION OF TEMPORARY SEDIMENT o N
LOCATION OF PORT -A -POTTY \ / \ TRAP #1 TO A PERMANENT DETENTION BASIN. THE CONTRACTOR SHALL INSTALL THE RETAINING WALL ADJACENT TO THE SEDIMENT TRAP &
�MPSTER % ♦\ CONCURRENTLY REGRADE THE TRAP TO THE FINAL CONTOURS SHOWN ON THE SWM FACILITY'S' DETAIL DEPICTED ON SHEET 10 & THIS SHEET. WHILE o
THE TRAP IS BEING REGRADED THE CONTRACTOR SHALL INSTALL THE PERMANENT RISER, BARREL & SPILLWAY TO MINIMIZE FUTURE DISTURBANCES.
♦ ¢ 0 0
THE RISER AND ITS LOW -FLOW ORIFICE SHALL BE TEMPORARILY PLUGGED WATERTIGHT AT THIS TIME AND THE REGRADED FACILITY SHALL FUNCTION �/� k o 0
ASA SEDIMENT TRAPPING DEVICE UNTIL ALL UPLAND AREAS ARE STABILIZED. V/ W i �♦ co
8. HILE THE RETAINING WALL ADJACENT TO SEDIMENT TRAP #1 IS BEING INSTALLED, THE CONTRACTOR SHALL BACKFILL THE AREA BEHIND THE WALL � z z
W W
♦� AND SHALL ROUGH GRADE THE FINAL PORTION OF THE ALLEY. ONCE THE LAST OF THE ALLEY HAS ACHIEVED ROUGH GRADES, THE CONTRACTOR CAN Z
�y ♦� U FINISH THE INSTALLATION OF IT, ITS CURB AND THE REMAINING DRIVEWAYS. WITH THE CONSTRUCTION OF THE ALLEY, THE CONTRACTOR MAY ELECT < O O
TO DELAY THE INSTALLATION OF THE FINAL TOP COAT OF ASPHALT UNTIL THE CONSTRUCTION OF THE LOTS HAS BEEN COMPLETED. THIS DELAY WILL z
j REDUCE THE RISK OF DAMAGE TO THE ASPHALT BY CONSTRUCTION TRAFFIC. a w
9. THE CONTRACTOR SHALL CONTINUE TO CONTROLAND PROTECT THE SITE FROM RUNOFF WITH TEMPORARY STABILIZATION MEASURES AT LOCALIZED
O \ AREAS THAT ARE NOT STABILIZED. THESE MEASURES INCLUDE, TEMPORARY SEEDING AND STRAW MATTING, SILT FENCE AND DUST CONTROL LW w
\ DC \ PROTECTION. THE CONTRACTOR SHALL USE PERMANENT STABILIZATION OF THE FINE GRADED DISTURBED AREAS. PERMANENT OR TEMPORARY SOIL
\ \ STABILIZATION SHALL BE APPLIED TO DENUDED AREAS WITHIN 7 DAYS AFTER FINAL GRADE IS REACHED ON ANY PORTION OF THE SITE. TEMPORARY
SOIL STABILIZATION SHALL BE APPLIED WITHIN 7 DAYS TO DENUDED AREAS THAT MAY NOT BE AT FINAL GRADE BUT WILL REMAIN DORMANTLL/I
a ° 1 (UNDISTURBED) FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE
li
LOT zg �. j S THAN 1 YEAR.
10.ONCE THE TRAP IS FULLY CONVERTED AND THE SITE's FINAL GRADES ARE PERMANENTLY STABILIZED, INCLUSIVE OF SWM FACILITY'B', THE
LOT o
3
CONTRACTOR CAN ACTIVATE THE RISER &LOW -FLOW ORIFICE IN SWM FACILITY'S' AND REMOVE ANY REMAINING ESC MEASURES. THIS IS INCLUSIVE
_ \
--� LOT 31 \ y sQ 1 \\ \ OF PERIMETER SILT FENCE, TREE PROTECTION, ORANGE SAFETY FENCE AND INLET PROTECTION. NO ITEM SHALL BE REMOVED, THROUGHOUT ALL
IP rI PHASES OF CONSTRUCTION, UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE ESC INSPECTOR GIVES PERMISSION. CONTRACTOR SHALL
4 \ \ * \ STABILIZE ALL AREAS OF THE SITE IN ACCORDANCE WITH EROSION AND SEDIMENT CONTROL REQUIREMENTS.
11. THROUGHOUT ALL PHASES OF CONSTRUCTION, THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA
EROSION AND SEDIMENT CONTROL HANDBOOK, REMOVING ONLY WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE
WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
12. THROUGHOUT ALL PHASES OF CONSTRUCTION, ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS
AFTER FINAL SITE STABILIZATION OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL N N
\, ^ • 'EXISTING PRESELn
RVEDf L m
22'x70' M N s \ ` \ \ \ STEEP SLOPES (TYP.) PROGRAM ADMINISTRATOR. TRAPPED SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES \ I N SHALL BE PERMANENTLY STABILIZED TO PREVENT FURTHER EROSION AND SEDIMENTATION. oo , CN
I
IP ♦ ONCE THE BULK OF THE ALLEY IS AT ROUGH GRADE, THE CONTRACTOR JFFER\
\ SHALL INSTALL THE PROPOSED STORM SEWER & CURB. THE CURB V '�
♦ INSTALLATION SHALL TERMINATE AT SEDIMENT TRAP #1's2aTIE-IN GRADES. � APPROVED / V A � �♦ �� �V - '��
\ INSTALLING THE CURB IN THIS MANNER WILL ALLOW ITTO FUNCTION IF /
1 ° PHASE III / S -ET +
DIVERSION DIRECTING UPLAND RUNOFF INTO THETRAP. ALSO THE
A�
l
� ♦ PROPOSED PHASE II DROP INLET AND YARD INLETS SHALL REMAIN BLOCKED ° /. Area=5.o8 ac. � � � � � / ° A A� A
* DURING CONSTRUCTION TO ENSURE SEDIMENT IS DIRECTED INTO TRAP#i. i Cw=o.65
♦ - i
APPROVED VDOT EW 1 c10.8 MIN.
ti
I l
i
°
VDOT EC-1 \
� �AA �♦ CLASS 1 RIPRAP _ �� �V �� M
\ W/FILTER FABRIC
L OUTLET PROTECTION ��G V r N V
i _ ♦ �Qio 1.8 CFS
Tb 4g� V V10 10.3 FPS IP
L=8'; D=2.5' ♦ _ M '�II'I��
A
Wl- x1.2
3 5'-3J5'
TS S�W2=8'+1.25'=g.25' �\ \ AINACE G�I� I—
b
z
o 4 v v N a
� 32' OF 015" HEAVY-DUTY, - \ \ V �� A �J�✓ �� C. 0 W
FLEXIBLE PIPE TO ♦ 0 / . ��' t N
\ � IP I CONVEY RUNOFF FROM
J IVi CURB DIVERSION TO ' 3 \�. A ♦ P A \ III � i RIPRAP LINED OUTLET N
PPROV � / � �`� � �S _ � � � ♦ � � � � � +
PHASE I � i \I PROTECTION & \ R \� -� DQ
j / — I \ � O .
\ ; SEDIMENT TRAP#z .y�'��'
ST1 \
Area=o.96ac. �SD T� A 2 ° Lu �
\ \
♦♦ V /DLd
Cw=o. ,.� ♦ STEEP SLOPES TYP. _ ° 45'; 3 5 5� \�
TC=S MIN. �� '�' ii v ♦ EXISTING MANAGED A IP APPROVED VDO F E'--i CL. I RIPR/. 1
\ O
\ ( ) V a U
APPRIVED DIVERSION BERM.
CONTRACTOR SHALLENSURE� Z
BM
_ I / � - .POSITIVE SLOPE MAINTAINED,
+ \ W V �Pr- \ 18" BERM PROVIDED. BERM w
�/'�
/ \ \ - .\ ♦ � \ � / �� � /�/ � , / • - SHALL BE STABILIZED AS A � \ � � V l
DISTURBANCE---- -"- J v ~
i�
APPROVED TS V Lu
L
v ♦♦ \
Y O
_ �_z 2 -� W �/ O
U)
\ TABv A \ Lu
LL
I ♦ - Ul w
v v ♦v — -T
� � � ' ♦ � � DEPICTION OF SEDIMENT TRAP CONVERSION TO SWM FACILITY'S' U) >
I� (SCALE i"=301 F_
AFTER THE SITE HAS BEEN ROUGH GRADED TO THE CONTOURS SHOWN \ ♦� - / / • w
W
DT ONTHIS PLAN, THE CONTRACTOR SHALL INSTALL THE RETAINING
\ \ \\ I WALL ADJACENTTO THE SEDIMENT TRAP& CONCURRENTLY REGRADE + �/ _ ' / - ,: \
34 THE TRAP TO THE FINAL CONTOURS SHOWN ON THE SWM FACILITY B
V ♦
— DETAIL DEPICTED ON SHEET to &THIS SHEET. WHILE THE TRAP I B IN
REGRADED THE CONTRACTOR SHALL INSTALL T/HE PEkMAYJEI�T�IS�R�.-
\ \ BARREL & SPILLWAY TO MINIMIZE FUTURE DISTURBANCES THE`RISER \
e \ SHALL BE TEMPORARILY PLUGGED WATERTIGHT AT THIS TIME AND THE - • /- -- __✓ _./�—�� '\\ w
\ - REGRADED FACILITY SHALL FUNCTION ASA SEDIMENT TRAPPING
w� DEVICE UNTIL ALL UPLAND AREAS ARE STABILIZED.
• WITH TH STALLATION OF THE RETAINING WALL _ ZD
ADJ NTTO SEDIMENT TRAP#2, THE CONTRACTOR �� � Al - i Q/�
ALL BACKFILL THE AREA BEHIND THE WALL --- -- -- - - --- ___
SF ALLOWING THE ALLEY TO ACHIEVE ROUGH GRADES. LIMITS OF DISTURBANCE, TYP., TOTAL-
. ..�-• ONCE THE LAST OF THE ALLEY HAS ACHIEVED ROUGH AREA=7.53 ac.TREE PROTECTION SHALL BE _ ----- - - - - _ *- / _ _ Bl-�-\ /�ti - - \
GRADES, THE CONTRACTOR CAN FINISH THE PLACED ON LOD LINE IN FIELD C)
�INSTALLATION OF IT, ITS CURB AND THE REMAIN( \ _'. --_ - DD - / - �' �, ® (N
,V DRIVEWAYS, AS DEPICTED ON THIS SHEET. TAN An
�I
All
E-
n
\
z 'STREAM BUFFER
GRAPHIC SCALE \ _ - ,- _ - - �_ �� JOB
5211NO.
SAF /
A
30 15 30 60 120 A A - - - j A q
\ r.
� � r
SCALE
( IN FEET
1 inch = 30 Pt. SHEET NO.
\
v
—
1992 3,15
SEDIMENT BASIN #1
SCALE: 1"=20'
f Z
4-2 0
X/
-
i
--- -_ ?I
�- -- -- --- -3:1
PROPOSED 33` WIDE GRASS LINED - -
_ EMERGEN YW/S:z SIDE
--- - 'SLOPES CR T V I o.67' - - -
ED 048".CL. III
4CKS SHALL
JRERISER S?F
Ig.67 2
PE W/
RISER
///A
(8'TO OF
7
CIO
SL 1
0
ET TE
ER DE M tL=
SEDIMENT TRAP #1
SCALE: 1"=20'
Sediment Basin #1 Design
MIN. 1' WI SPILLWAY CREST OF EMERGENCY
2'MHOUT SPILLWAY
drainage area (acres)
5.31
DESIGN XICX WATER
basin volumes: (using 2' contour intervals)
(�-� STORM ��)
elevation (ft) contour area (st)
volume (cy)
D.s'
402.00
610.0
0
Mr 1.0'
404.00
1617.0
79.5
RISER CREST
RISER
406.00
2749.0
239.4
x STORAGE RING
408.00
3998.0
487.8
WET STORAGE
410.00
5349.0
832.8
412.00
6800.0
1281.7
SEdMENT CLFANOUT POINT
(EW GERM ICED
uSTO�
TO 34
wet storage required (cy) (67*DA)
355.8
design high water (ft)
411.00
dewatering orifice elevation (ft)
406.9
top of dam (ft)
412.00
wet storage provided at this elevation (cy)
355.8
top width of dam (ft)
8.0
available volume before cleanout (cy) (min. 34*DA)
180.5
bottom of basin (ft)
402.00
cleanout elevation (ft)
405.3
approx. bottom dimensions:
12'x112'
distance from cleanout to orifice (ft) (> 1')
1.68
upstream face slope:
2:1
downstream face slope:
3:1
dry storage:
dry storage required (cy) (67*DA)
355.8
baffles:
NO
principle spillway crest (ft)
409.67
length of flow, L (ft)
134
dry storage provided at this elevation (cy)
420.0
effective width, We (ft)
46
diameter of dewatering orifice (in)
4.0
L / We (baffles not required if> 2)
2.88
diameter of flexible tubing (in) (orifice+2")
6.0
collars:
YES
runoff.
depth of water at spillway crest (ft)
7.67
C (use 0.45 for bare earth)
0.65
slope of upstream face (Z:1)
2:1
tc (min)
10.8
slope of barrel (Sb)
1.33%
1 2yr 4.0 Q 2yr
13.8
length of barrel in saturated zone (Ls)
48.61
1 25yr 6.0 Q 25yr
22.8
number collars required
2
dimension of collars
4.4x4.4'
principle spillway:
available head (ft)
1.00
emergency spillway:
YES
diameter riser (in)
48
required capacity (Q25-Qp) (cis)
7.8
spillway capacity, Qp (cis)
15.00
bottom width (ft)
33
diameter trash rack (in)
36
slope of exist channel (ft/ft)
33%
barrel length (ft)
75
minimum length of exit channel (ft)
17
head on barrel through embankment (ft)
10.67
crest of spillway (ft)
410.67
diameter of barrel (in)
15
SEDIMENT TRAP #2
SCALE: 1"=20'
oee
ao
VV
Sediment TraP2 design
drainage area (acres)(<3) 0.1
trap volumes:
elevation (ft) area (sf) volume(cy)
466.00 327.0 0.0
467.00 519.0 15.5
468.00 736.0 38.7
x�.
RETE WASH /
OUT AREA-,
l
wet storage:
wet storage required (cy) (67*DA) 6.7
bottom of stone weir (ft) 466.5
wet storage provided at this elevation 1 7.8
slope of wet storage sides 2:1
dry storage:
dry storage required (cy) (67*DA) 6.7
crest of stone weir 467.0
dry storage provided at this elevation 1 7.7
TEMPORARY SLOPE DRAIN
I
CORRUGATED METAL
EXTENSION COLLAR
WATERPROOF SEAL
PROVIDE OUTLET
PROTECTION
EARTHEN DIKE PROVIDE INLET
(COMPACTED) PROTECTION
+A �(
24.1` D D.e'
I
STANDARD FLARED END SECTION
SECTION VIEW
NOTES SEDIMENT MAY BE CONTROLLED AT OUTLET IF UPLAND PONDING
WILL CREATE PROBLEMS
EARTHEN DIKE
(COMPACTED)
Source: Va. DSWC
x- \
CRWND
LLLV.
CREST OF STORE WEIR
\
y
r vARINlE
ipRD,g�
1A,
DRYSTORAGE -
N YARVHIE
WET STORAGE L, MIX
(EMDAYMED)
FLIER GLOM
UEGNAL
,MKIND
ELEV.
-SEE %ATE 3.13 1
CM AGGRSCxX
CIASs I RPRAP
weir length (ft) (60A)
0.6
bottom of trap elevation (ft)
466
bottom trap dimensions:
9'X40'
top of dam elevation (ft)
468
top width of dam (ft)
4
V OF
OTTY
SECTION A - A
tR, D+6"
Plate 3.15-1
Lic. No. 0357911E
11/5/21 47J
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JOB NO.
152118
SCALE
III = 20'
SHEET NO.
6
l MANAGEDSLOPES
PRE -DEVELOPMENT SCENARIO (SCIAL 0h 1"=JU' D.A.'A'Pre-Development Impervious Areas(WaterQuantity) PRESERVED SLOPES
Existing Structures 5,328 sf
Existing Drive & Walkways 12,532 sf STREAM BUFFER
I L' EXISTING TREE LINE (TYP.) Total = 17,860 sf
,,'"111111� D.A.'A'Pre-Development Pervious Areas (Water Quantity)
Existing Woods 86,500 sf
70
Existing Grass 70,334334 sf
\ D.A.'B' Pre -Development Impervious Areas (Water Quantity)
_ , 1 Existing Structures 0sf
Existing Drive & Walkways 0 sf
Total = 0 sf
D.A.'B'Pre-Development Pervious Areas (Water Quantity)
Existing Woods 23,sf
Existing Grass 21,908 908sf
\ Tc�--0.22 hrs.
OF OLF w/ o ELEV.=3.5' ( I 0.1 hrs.)
�^ \
OF cF w/ o ELEv.-63' (Tc-q!04 hrs.)
0 \ \ \
/6—
�o //�
i
—460— — \-16
Tc=o.22 hr.
r l, z6
/ NO XIN
IW
EXISTING PRESERV
STEEP SLOPES (TYP.),
D.A. B
i.o5 ac.
/
CN=58
/ Tc=o.so hrs.
i
\ \ \ � n �j
i
II
LOCATION OF PROPOSED
t1� (� SWM FACILITY'B'
LOC bTION OF PROPOSE SW�VI/FAA�ILIT� �N A
V,,/\,.
X� T �` �` vvv ,
i A \
\ \ /
— —4
PES HAVE BEEN DETERMINED LESS—
� THAN 25%8As>ED ON NEW TOPOGRAPHIC
�EXHIBIT & SURVEY PROVIDED BY
�. ROUDABUSH, GALE
Tc= 0.10 hrs. i�. c 1AND ASSOCIATES AS PERMITTED
100' OF OLF w/ A ELE .=16' c= .10 ) UNDER SECTION 3o.7.4(b)h (TYPICAL) _ _ — - —YI
42' OF CF w/ 4 ELEV._I
10 GRAPHIC SCALE
APPROVED STREAM _ - --- IH1 f1111�111111 - / \ \
1 BUFFER (TYP.) \ -
\ i IN POET
io rt. EXISTWGPR-ESE VE_D:
STEEP SLOPES (TYP
SCOTT/R. Ct?LLINS-,
Lic. No. 035791 ,�
P 11/5/21
0�`SIO
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0
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W W
Wp' �
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Ul > IY
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JOB NO.
152118
SCALE
1"=30'
SHEET NO.
7
POST -DEVELOPMENT SCENARIO & BEST MANAGEMENT PRACTICE PRESERVATION EASEMENT (SC LE F� 1'='31Q')! pg APPROVED Tc= 0.18 hrs. 0 MANAGED SLOPES
APPROVED Watershed Summary for DA'A' ���usse��!0-*"** 100' OF OLF w/ A ELEV.=3.5' (Tc=0.18 hrs.) PRESERVED SLOPES TH 0�,�
(Per Approved Amendment #3 to WPO 201600058) ���• •• C\ ~!♦♦ ? 4\75 0 OF C F @ 14 fE/s (Tc ( C >0.01 h S hrs.)
STREAM BUFFER
!! 1�( ��s�I SCOTT R. LLINS
Area, 1-year Flow, 2-year Flow, 10-year Flow, �! 'Z
_ _ �i O -
CN ae. cfs cfs cfs !! / ♦ U Lie. No. 035791
u / ♦ i — ! APPROVED
Post-DevelopmentPre-Development
DA A' 80 4.17 2.41 2.88 7.107 l ! LIMITS OF TREE 011/5/21 �4
\CLEARING (TYP.) IoxAL E�ol
D.A. 'A' Pre -Development Impervious Areas (Water Quantity) ♦♦
Existing Structures 5,328 sf .♦! \ > tt !j! _ _— I \
Existing Drive &Walkways 12,532 sf
Total = 17,860 sf \ — !� \ �'� \ \ \
VARISTREETMARIN COURT AND THE
D.A. 'A' Post- Development Impervious Areas (Water Quantity) / / ` !♦ > \ \\ \ \
SURROUNDING LOTS ARE NOT PART OF
�� ♦ / \ \ \ THIS SET OF PLANS. THE PROPOSED SWM
Roadway 29,600 sf O � � �� � ♦ � 1 \\, � \
Sidewalks 19,300 sf i ♦ ♦ s \
/ �1 A VA V A FACILITIES & BEST MANAGEMENT
Buildings 46,650 sf / \ !♦ -
- �� V / V A ` • \ \ N
95,550 sf PRACTICES ARE PROPOSED WITH THIS
SET OF PLANS & PROVIDE TREATMENT
AMENDED Watershed Summary for DA'B' + - - - / / ��; / ••�� \ \ \ \ \1. \\ s
FOR THE ROADWAYS AND SURROUNDING
(*Per Approved Amendment #2 to WPO 201600058)
LOTS. w
NOTE: This Amendment #4 releases post -development flows below the previously approved peak post -development flows. / 9En
�� — — _ \ �` ♦ \ \
Area, 1-Year Flow, 2-Year Flow, 10-Year Flow, �4,Q � � _ w i ��� �1♦ `\ �� �� \ \ \ \ co F-
CN ac. cfs cfs cfs — i \� \ \ V �� �. y m W
— % ♦ V % \ \ V A \s �
*APPROVED Pre -Development DA'B' 58 1.05 0.36 0.67 2.34 Q + — / �� / A♦♦ \ ar- O
*APPROVED Post -Development DA'B' 85 1.05 0.48 0.55 2.24 �� ♦ ♦ y \ \ , / ♦♦ �. A�� \ z
AMENDED Post -Development DA'B' 73 1.05 0.32 0.36 1.95
V o
Z / ROVED DA' v \ \ v �� �� v Ln
*APPROVED D.A.'B'Pre-Development Impervious Areas (Water Quantity) Q - � 17ae vv x V♦! A A VA \Lu
Existing Structures 0 sf ♦♦ A� n / \ \ VA V A V LU Existing Drive & Walkways 0 sf ♦♦�� / ` A _ 80 V \ \\ \VA \ \ \
Total= 0 sf 3 _ ♦ C-0.18 ill ♦ \ A
A
AMENDED D.A. 'B' Post -Development Impervious Areas (Water Quantity) ♦\ \ `
Roadway 6,474 sf _ ♦ ♦ ♦ ��� �� �� V �!1 V A \
Sidewalks & Driveways 1,217 sf 4 \
— _ - - V k ��6II. V!! ���
a
Buildings 7,230 sf A
14921 sf / V ! A'"V A� �ORE�T &OPEN SPACG
�� \ \ - - ErMENT\(DB 04967, PG
APPROVED Impervious Areas for Water Quality
1 T ♦ �� �.� (�� \ \ �!!!� �� 3��3 ). EASEMENT IS A BES
P Q Y - -, & r
/♦1 ��,. \ k k �,. x / \ \ �! M�Nip M�NTPRACTICE N
I % / ♦ ♦ 31 �H l-IIBI�S FUTURE
/ i ;' � � ♦♦ -�♦� < �Q - !!! A b LOI IMENT & m` ..
�� �� /x r /i� �.' -- ♦♦ \ / '------- _ �i !!! /JD�\S RBANCES
< \ F / / / / - / / ��\ - Sfi�E�M B FAR (TY-P.)
A
�r
AMENDED Impervious Areas for Water Quality
v ♦ ® \ \ ti
'-
40
/ / _ !!! �� �I - I�. � � A \ \ �♦♦A `5' V A � � k _° > � / / \/ / / � � !1 v,
40 \ V ♦ \ V / / / i ♦ A v
I
\ \♦♦ <\ / / / \ / / \ \ Total130,684 sf CV � LU
This Amendment #4 proposes less impervious areas v_ -
than the previously approved plans. Therefore the prior V A A / / / / \ �' UU CL
nutrient credit purchase and SWM Preservation Easements - \ \ — \ \ \ — / / \ /
/ remain sufficient to meet the minimum water quality x _ �" \ \ ♦♦ / / / A
A + /Uj
requirements. 1DA B - A V A ��� - - \ / / / / / / / APPR V SHAPE \\ i
\ DS dC �, i A V� / / RIPR NED CHANNEL l Z W
/ CN= v.i 7 / i \ A ♦♦♦�� V l / / x + , DI TI RUNOFF IN \ W W o
Tc-0 10 1♦�! v A \ d+ THE S FACILI A J
hrs
3 � v � _j_
- `� �\ ♦♦�� �tk �� a \/ in I �-
/_j�li' i�En
® CO d
LU
AMENDED (UNCHANGED) Tc= 0.10 hrs,
50 OF OLF w� ELEV.=4' (Tc=0.07 hrs.) + _
& 275 OF CF w A ELEV.=22 Tc= 0.01 hrs. — - G
(MIN. SCS Tc=0.10 hrs.)
U LU
7, - SWM FACILITY EASEMENT / \ _n O 2:
APPROVED STORMWATER MANAGEMENT NARRATIVE: \ \ - — ♦� - / DBO 6 PG >_ >_ '-�
THE PROPOSED PLAN PROVIDES STORMWATER TREATMENT FOR THE CONSTRUCTION OF
- - i ( 49 7, 33 34) , / / / \ IIll W
THE DUNLORA LOTS (UNDER SEPARATE REVIEW). THIS VSMP PLAN ADHERES TO PART IIB \. .. V - \ ♦� x / T
REQUIREMENTS FOR STORMWATER MANAGEMENT. THE SUBMITTAL PACKAGE DOCUMENTS V ♦♦ A / / / �� 'Ij�-�j,' IL W _j Q
ASSOCIATED WITH THIS PLAN OW WATER E QUALITY
COMPLIANCE
S RVA ION, AND AMET THROUGH `.\ ---- ---- -� - \ _ _ _ _ ♦♦ / J ?_ _III 1� Z
THE BEST MANAGEMENT PRACTICOF OPEN SP CEPRE
NUTRIENT CREDIT PURCHASE. THIS PLAN ALSO COMPLIES WITH PART IIB REQUIREMENTS BY - _� / - A ! + �/ / / 4� y 1 � L Q
THE ATTENUATION OF FLOWS IN THE DETENTION BASIN. PLEASE SEETHE ATTACHED �' - A _ A -- — / / / II B G
STORMWATER MANAGEMENT CALCULATIONS PACKET FOR THE FULL DETAILS OF PLAN ( \ -- \ EXISTING MANAGED- � � �� \ � � � � � - � / / � � i � I�1 L � -
COMPLIANCE. A \ �� \ _ STEEP SLOPES (TYP.) v t� / / Ii lip f- LC
LU
General Construction notes for Stormwater Management Plans
i. All dams and constructed fill to be within 95%of maximum dry density and 2%of 3 \ �\ \�. A i� - V ' \ �'. :� ` — — _ /� / � 111 LU
optimum moisture content. All fill material to be approved by a geotechnical engineer. A Q r\ \ / --� _ — \ VA \ \ V A V A \ — / — L �� / / / / / I� I ti Q
eotechnical engineer is to be resent during construction of dams. _ \ \ ` / Z LJ..
9 9 P e \ \ \ - - _ _ - - ---- \ AEI N�`PE"S.�R,�E� - - - ism-
z. Pipe and riserjoints are to be watertight within stormwater Management facilities. \ I \
3. For temporary sediment traps or basins which are to be converted to permanent \ \ \ \ -\ L ` _ 'P '� Q I `' �� \ \\ _ /— — — 4 — — �� �♦ / !I�IIII�I (n G
stormwater management facilities; conversion is not to take place until the site is I — - \ \ \ \ s; — — — — _ — �!!♦ / / /.l=lj� O
stabilized, and permission has been obtained from the County erosion control inspector. \ APPROVED SLOPES HAVE BEEN)--
V DETERMINED TO BE LESS THAN z5% v \ V ` v - - - - - - - / - Lij -
\1\ ♦♦ BASED ON NEW TOPOGRAPHIC EXHIBIT & \ ` _ _ _ _ i / / �l� U)
SURVEY PROVIDED
/ I - - - 422- - �� !� / / �t_II� - ��l
GALE AND ASSOCIATES AS PERMITTED i
J Q o
! • UNDER SECTION 3o.B 4(bo (TYPICAL) � , , �2- _ _ • ! / �/ / / , - - - - � \ i I_il (D
' _
CN
Lu
l
♦ _ i
7'IIIII- III
v — 111 —11 w o
II�
APPROVED STREAM / ■is�u����������1-I �ti a m
� \ BUFFER (TYP.) v A � � _- �- �� - - _� �_IIl=4�l,�� +�_-
v v GRAPHIC SCALE � \ v
/ _ JOB NO.
70 60 ,zo �
152118
SWM FOREST& OPEN SPACE - - SCALE
\ EASEMENT (DB 04967, PG 133-134) \ _
IN FEET ) COINCIDES WITH PROPERTY LINE 1°=30'
/ 1 inch = 30 ft. SWM FACILITY TO TREAT - -
- - WATER QUANTITY (NOT QUALITY). ���`� _ _ SHEET No.
v�� — 8
STORMWATER MANAGEMENT FACILITY 'A' DETAIL (SCALE OF 1"=30')
CONTRACTOR SHALLJN"
PROPOSED V-SHAPEDVI
RIPRAP-LINED DITCH (2.5' S1
WITH FILTER FABRIC UNDER(
CONVEY RUNOFF TO THE SV
(� Q2=837 GFS L
X V� t4 E( �S
/010='j .L3 CIF / RU
+ / 1�;0//= d.91 FTj �)
)SLQPt=7%) NC
APPROVED
LOTLINE
PROPOSED GRADING WITH
THIS AMENDMENT. GRADING
CREATES A NEW RIPRAP
LINED DITCH & EXPAN
\ BASIN's VOLUM
TACLA /10+00. O CL11
)NE CfEPTH)- ' ' _ I
%YMEN'f 15TO 1
M F� I/yyII-i \
RAPki
MALE vv �rl�,,
SCALE
I I
% /42-2 `I
y
gEPROVF � / 6� I ii I,
,frANITs1RY5EWER I
-SGYM FACILITY EASEMENT I IMF
(DB 04967, PG 133-234) ILf
CONTRACTOR TO FILL & STABILIZE
THE EXISTING ERODED RIPRAP LINED
\\ CHANNEL IN THIS LOCATION.
CONTRACTORTO REROUTE THE
ASBUILT CHANNEL TO THE PROPOSED
ALIGNMENT SHOWN, LENGTHENING
I & STABILIZING THE FLOW PATH. NEW
L I FLOW PATH: WIDTH RATIO=120143'
/ I (OR 11).
I;� 1
CONTRACTOR SHALL MAKE THE
FOLLOWING MODIFICATIONS TO THE RISER:
i. PLUG THE 04" ESC DEWATERING ORIFICE
-IWATERTIGHT (INV. 406.83)
- 2. DRILL ONE (i) NEW 03.5" LOW -FLOW
SWM ORIFICE (INV-402.00)
3. DRILL FOUR (4) NEW 012" MID -FLOW
\ SWM ORIFICES (INV. 408.25)
4. INSTALL A WEIR PLATE OVER THE TOP
HALF OF THE BARREL
'sOPENING
5. INSTALL TRASHRACKS ON THE LOW-
�
t _ - - - - - - AND MID -FLOW ORIFICES. SEE DETAIL ON
\!- �' - - - - - \ \ THIS SHEET, OR EQUIVALENT
a g
L-I .
Y156UILT GRADING, GENE AR LLPL� IIC
CONSISTENT WITH THE -
APPROVED PLAN-TYR.
y } I-1 /3+0
ASBUILT34�WI EGRe55 CIN D -- - - - -
EMERGENCY S LWWAKRE �.=- g 4*
ELEVATION=410.7'. (8' T R, F DAM `- V _ V ��-� ._ 1 +67.99
ELEV. =412.00')A
\ o
ASBUILT 048"CL. III RCP%ANDPIP
w/TRASHRACKS SHALL SERI(EA�
THE RISER STRUCTURE. ASBUILT
RISER STRUCTURE RIM=409.70'. \ \ \ I
\ -
ASBUILT 015" RCP BARREL (71.9 LF, 5=1.40 TLET RO
APPROVED VDOT EC-1 CLASS Al CUP EN N \
INV. IN=400.90', INV. OUT=399.90') gr/GEOTEXTILE FILTER FABRIC UNDERLAYNINIT.`
ASBUILT DIMENSIONS:L=16.5', W1=7.4%W2=189' \
BASIN NOTES:
1. STATEAPPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS.
2. A CONCRETE FOUNDATION SHALL BE INSTALLED ON THE RISER AS SHOWN & MEETING THE MINIMUM SPECIFICATIONS SET FORTH IN THE VESCH SPEC. #3.14.
3. CONTRACTOR AND CONSTRUCTION SHALL ADHERE TOALL OSHA REQUIREMENTS. ADDITIONALLY, SPECIAL ATTENTION SHALL BE GIVEN TO THE CONSTRUCTION
SHORING ASSOCIATED W ITH THE BIORETENTION BASIN EXCAVATION.
4. CONTRACTOR SHALL REMOVE SEDIMENT LADEN SOIL& GRADE THE BASIN TO THE CONTOURS SHOWN ON THIS SHEETATTHETIME OFTHE TEMPORARY ESC
BASIN's CONVERSION TO A PERMANENT SWM FACILITY. CONTRACTOR SHALL ENSURE THE PERMANENT SWM FACILITY HAS A STABILIZED GROUNDCOVER, SUCH AS
GRASS OR OTHER FORMS OF VEGETATION, AND THE FACILITY FLOOR MAINTAINS POSITIVE SLOPE TO THE RISER STRUCTURE's LOW -FLOW ORIFICE.
435
435
CONTRACTOR SHALL MAKE THE FOLLOWING MODIFICATIONS TO THE RISER:
1. PLUG THE 04" ESC DEWATERING ORIFICE WATERTIGHT (INV.=4o6.83 AB)
2. DRILL ONE (1) NEW 03.5" LOW -FLOW SWM ORIFICE (INV: 402.00)
3. DRILL FOUR (4) NEW 012" MID -FLOW SWM ORIFICES (INV.=4o8.25)
4. INSTALL A WEIR PLATE OVER THE TOP HALF OF THE BARREL's OPENING
5. INSTALL TRASHRACKS ON THE LOW -AND MID -FLOW ORIFICES. SEE DETAIL
430
ON THIS SHEET, OR EQUIVALENT.
430
APPRO
ED
ORIGIN
LEXISTI
GGRAD
LOTGR
DING
\
(PRE-CCNSTRUC
ION)
425
425
420
\
420
ASBUILT
STIR.
TOP OF
ALL-4L=42
.24
�
PPROV
4 ��
D 0 8
L. III RCP
10=421.6
(J.5"HD
E)
STANDPIPEw/TRISHRACK
SHALL
SERVE AS
THE RISER
STRU
URE.
ASBUILT
048" PIS
R RIM
D -
L
72'
Q 2= 8.
7 CF
ELEV.=4
9.70'.
415
V=4.8FP
415
RIPAP
3
Q10
3 C
S
ASBt)[LT34'VVIDE
GRASS
LINED
E
p,o Q
91FT
EME
GENCY
PILLWA
CREST
ELEVA
ION=4io.
'
ASBUILT
GRADING
WITH
- "
(8'T
POF DA
ELEV.-412.00')
PROPOSED
GRADE
CON
RACTOR SHALL IN
STALLA
410
M
DIFICAT
ONS
PRO
SED V-SHAPED V
OT CL. I
'STONE
410
RIPRAP-LINED
DITCH z.
DEPTH)
WITH FILTER I
ABRIC
X
UN
ERLAYMENT TO CONVEY
Q
RUN
FFTOT ESWM
AGILITY
APPROVEDTEMPORARY
ESC
^'
IN TO BE
CONVERI
ED INTO
PERMAN
7NT SWM
FACILITY
4Q5
PROVIDI
6 STORMWATER
\
4Q5
UAN
ITYTREAT
ENT
APPROVE
D FLOOR
GRADE E
EV.=4o2
oo'. CON
RACTOR
ENSUE
POSITI
SLOPE
OTHERI
ERATA
LTIMES.
T
400
400
CONNE
TIONSH
LL BE FIRMLY
EM
EDDED
" INTO A
R
INFORCE
18" THI
K CONCF
ETE FOU
4DATIONITHAT
IS
x
ND IS BURIED
BELOW
THE
LIMITS OF
THE BASIN
GRADING.
SBUILT
25"RCP
ARREL
13
395
1
=400.90',
INV.OU
= 9-90')
395
PPROVED
00T EC-1
CLASS Al
UTLET PR
TECTION
w/ GE
TEXTILE FILTER
FAB
IC UNDER
YMENT.
392
ASBUIL7DIMENSI
S:L=16.5,W1=7.4%W2=18.9'
392
WW
Vl
H
00 N
N M1
OD
u"�
00 N
O2
J J
W W
M
M
N (�!
~ �N
� H1
N Q1
N N
O
It
4
0 It
W I.L.
10+50
PROFILE SCALES
1M =5 M
1"=5o'(H)
11+00 11+50 12+00 12+50
BASIN 'A'
13+00 13+50 13+75
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 BEYONDTHIS ISOPTIONALAND IS NOTREQUIRED.
2. THE PROPOSED SIDE SLOPES OF THE BASIN SHALL BE A MAXIMUM OF 2:1 TO REDUCE THE RISK OF EROSION. THE PROPOSED
FLOOR SLOPES SHALL BE G RADED 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 OFTHETOE OF THE EMBANKMENT NOR
WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY STRUCTURE.
4. A VEGETATED BUFFER SHALL BE PROVIDED THAT EXTENDS AT LEAST 25 FEET OUTWARD FROM THE BASIN TOP OF DAM
ELEVATION. PERMANENT STRUCTURES (E.G., BUILDINGS, SHEDS, etc.) SHOULD NOT BE CONSTRUCTED WITHIN THE BUFFER AREA.
EXISTING TREES SHALL BE PRESERVED IN THE BUFFER AREA DURING CONSTRUCTION IF AT ALL POSSIBLE.
5, 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 GREATTHAT IT EFFECTIVELY PREVENTS ROOT
PENETRATION AND THEREFORE MAY LEAD TO PREMATURE MORTALITY OR LOSS OF VIGOR. AS A RULE OF THUMB PLANTING
HOLES SHOULD BE THREE TIMES DEEPER AND WIDER THAN THE DIAMETER OF THE ROOTBALL FOR BALL -AND -BURLAP STOCK,
AND FIVETIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK.
6. AVOID SPECIES THAT REQUIRE FULL SHADE, ORARE PRONETO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OFTREES
AND SHRUBS IS STRONGLY RECOMMENDED AS MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS.
CONTRACTOR REQUIREMENTS:
1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS.
2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR
ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON
THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE
VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, INC. AND
THE VIRGINIA SOCIETY OF LANDSCAPE DESIGNERS).
3. ALL PLANT MATERIAL SHALL MEETTHE 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
1-800-552-7001 BEFORE ANY EXCAVATION).
6. REFER TO THE APPROVED FINAL SITE 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 SHALLOCCUR WHEN THE SOIL IS FROZEN.
15. PLANT MATERIALSHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN
THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING 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 CALENDAR YEAR.
17. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF TRASH AND DEBRIS WITHIN THE LIMITS OF THE PLANTING
ON A DAILY BASIS.
18. THE CONTRACTOR WILL NOT BE RESPONSIBLE FOR PLANT MATERIALTHAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHER
ACTIVITIES BEYOND THE CONTRACTOR's CONTROL.
FACILITY CONSTRUCTION
1. THE DETENTION BASIN MAY SERVE AS A SEDIMENT BASIN AND/OR TRAP 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 POND IN MIND. APPROPRIATE PROCEDURES SHALL BE IMPLEMENTED TO PREVENT
DISCHARGE OF TURBULENT WATERS WHEN THE BASIN IS BEING CONVERTED INTO AN DETENTION BASIN.
2. THE DETENTION BASIN SHALL ONLY BE CONSTRUCTED AFTER THE CONTRIBUTING DRAINAGE AREA TO THE POND IS COMPLETELY
STABILIZED. IF THE PROPOSED POND 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.
3. INSTALL E&S CONTROLS PRIOR TO CONSTRUCTION OF THE BASIN, INCLUDING TEMPORARY DE -WATERING DEVICES AND
STORMWATER DIVERSION PRACTICES. ALLAREAS 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.
4. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALLTHE SPILLWAY PIPE DURING THE ESC PHASE.
S. CONTRACTOR SHALLALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) DURING THE ESC PHASE TO ENSURE
THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION.
6. THE CONTRACTOR SHAULTHEN CONSTRUCIFTHE IMPERVIOUS CLAY CORE EMBANKMENTAND ANY INTERNAL BERMS IN STO
12-INCH LIFTS AND COMPACT THE LIFTS WITH APPROPRIATE EQUIPMENT.
7. 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.
8. CONTRACTOR SHALL THEN CONSTRUCT THE EMERGENCY SPILLWAY IN CUT OR STRUCTURALLY STABILIZED SOILS.
9. THE CONTRACTOR SHALL THEN FINISH CONSTRUCTION OF ALL OUTLET STRUCTURES, INCLUDING DOWNSTREAM RIP -RAP APRON
PROTECTION.
10. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW.
11. THE CONTRACTOR SHALLTHEN INSTALL THE APPROPRIATE BASIN LANDSCAPING INACCORDANCE WITH THE APPROVED PLANS.
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 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 FOR EVIDENCE OF CLOGGING,
LEAKAGE, DEBRIS ACCUMULATION OR OTHER FAILURES AS APPLICABLE.
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. EXTENDED DETENTION BASIN INSTALLATION (e.g., INTERIM AND FINAL ELEVATIONS)
S. INSTALLATION OF THE EMBANKMENT, THE RISER/PRIMARY SPILLWAY, AND THE OUTLET STRUCTURE(s).
6. PLANTING PHASE (WITH AN EXPERIENCED LANDSCAPE ARCHITECT PRESENT/DIRECTING)
7. FINAL INSPECTION (DEVELOP A PUNCH LIST FOR FACILITY ACCEPTANCE)
e
1 /2" zinc plated hook
attached with 3/8' reetener
'-1 18" di0. holes
`S tl90�O myd �
HDPR siruMural pinslic will -
holes and 114" plate
OO Dlanumutured by Mastic
Solutions Inc. or cq unl
5/8" dia hole
single
orifice
Elevation
DEBRIS CAGE
STEEL WEIR PLATE TO BE
FASTENED OVER THE 15"
OUTLET OPENING,
COVERING THE TOP HALF OF
THE OUTLET OPENING.
SEAL OPENINGS AROUND
THE PLATE WITH MORTAR
TO CREATE A WATER -TIGHT
PLATE OVER THE OPENING.
INSTALL STEPS IN EX. RISER
STRUCTURE IF THE STEPS
HAVE NOT PREVIOUSLY
BEEN INSTALLED.
48" RISER
OUTLET PIPE
15" RCP
WEIR PLATE DETAIL
N.T.S.
' shown with optional plate
HDPF sI.-eickirml pinsl.ic with
-1/8" holes and 1/4' plate
manufactured by Plastic
Solutions Inv or equal
PLASTIC
P.O. s., d38
6
SOLUTIONS
Caches., YA 22804
INC. 877-877-5727
rre.Plsslic-II
SECTION A-9: TYPICAL GRAPHICAL DETAILS
Homogeneous fill
4' minim
2 Cut off trench,-b' below sL"e
material
SoilL_ ar rock _ _ - __ - - - - - -
J
TYPICAL HOMOGENEOUS
EMBANKMENT
Perforated cc
FOUNDATION DRAIN
drvir
gmd or mc#
d2JiG1
IeDd be
Transition filter
CHIMNEY DRAIN
Transition fill
_Rock or gravel
'-Blonket drain
BLANKET DRAIN
or gravel
drain
c 82ciD 0
Transition filter
TOE DRAIN
Figure A -la. FIolylogeneoris Eurherll xrerin w/Seepage Corrh'ds
StormRax-
ROUND SERIES TRASH RACK
CONCRETE MANHOLE
STANDARD 60 I NCH RACK SHOWN
DIMENSIONS IN INCHES
PLAN
SIDE VIEW
StannRaI Round SeIles for COnclete Manhole
hR NN
IRA
D8s7
mme
I81sD
M! OD
A6N
ITT(
14%.
28 �
M
30
0.S3r
21iG
1 14
ID%
I3a
U
uar1
27K
1 18
1 54.
1 as
I 5T
Its60
27M1
12%
1 "M$
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ISOMETRIC
CONCRETE STRUCTURE DIMENSIONS
INSIDE STRUCTURE DIMENSION
OUTSIDE STRUCTURE DIMENSION
AVAILABLE OPTIONS
CROSS BRACING FOR OVERHANG
HOPE I1NTI-VORTEX PLATE
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DEAL
SCOTT/R. CbLLINS'Z
Lic. No. 035791,E
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JOB NO.
152118
SCALE
AS SHOWN
SHEET NO.
9
• " -, COUNTY OF ALBEMARLE
R Department of Community Development
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). It 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:
I. 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 hype.
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. Biotilter 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.
STORMWATER MANAGEMENT FACILITY 'B' DETAIL
(SCALE OF 1"=10')
GENERAL SWM NOTES:
i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE SHEET 9 FOR DETAILS OF THE ORIFICE's
TRASHRACK AND THE RISER's TRASHRACK, OR EQUIVALENT.
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 EMBANKMENTS ARE STRUCTURALLY SOUND. ALL
EXISTING AND PROPOSED FILL MATERIAL AND PROPOSED CONSTRUCTION SHALL BE APPROVED BY AN ONSITE GEOTECHNICAL
ENGINEER PRESENT DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS, AND PRESENT DURING THE CORE
SAMPLING. SEE SHEET 9 & THIS SHEET FOR ADDITIONAL NOTES & DETAILS.
4. THE DOWNSTREAM EMBANKMENT SIDE SLOPES OFALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM 3:2 SLOPE.
5. CONTRACTOR SHALL EXCAVATE SEDIMENT LADEN MATERIAL IN THE ESC SEDIMENT TRAPS & BASINS AT THE TIME OF THE FACILITIES'
CONVERSIONS TO PERMANENT SWM FACILITIES, IF APPLICABLE. AT SUCH TIME THE CONTRACTOR SHALL REGRADE THE SEDIMENT
BASINSITRAPS TO THE PROPOSED GRADES SHOWN ON THE SWM SHEETS. THE CONTRACTOR SHALL MINIMIZE SOIL COMPACTION
DURING THE CONVERSIONS.
ALL SLOPES GREATER THAN 3:1 SHALL BE PLANTED WITH NON -EROSIVE
LONG GRASSES OR OTHER TYPES OF NON -EROSIVE PLANTINGS.
EMBANKMENT NOTES:
THE EMBANKMENTS SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE WITH
THE DETAILS SHOWN IN THIS PLAN. FILL MATERIAL SHALL BE FREE OF WOOD, ROOTS, STUMPS, RUBBISH, STONES
GREATER THAN 6" AND ANY OTHER NON COMPACTING SOIL. FILL MATERIAL FOR THE CENTER OF THE
EMBANKMENT AND THE CUTOFF TRENCH SHALL CONFORM TO UNIFIED SOIL CLASSIFICATION CL, SC OR GC.
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. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING & THE
REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING.
EMBANKMENT TO INCLUDE A FOUNDATION DRAIN, BLANKET DRAIN AND A DOWNSTREAM TOE DRAIN IN
ACCORDANCE WITH VA DEQ DESIGN SPECIFICATION APPENDIX A, FIGURE A-Ia. SEE SHEET FOR DETAIL.
ANTI -SEEPAGE COLLAR NOTES:
BARRELS PASSING THROUGH THE EMBANKMENTS SHALL INCLUDE PERMANENT ANTI -SEEP COLLARS IN
ACCORDANCE WITH VA DEQ DESIGN SPECIFICATION APPENDIX B, FIGURE B-2. SEE THIS SHEET FOR DETAIL.
CONCRETE COLLARS SHALL MEET THE FOLLOWING REQUIREMENTS, TYPICAL:
A. A MINIMUM OF TWO (2) COLLARS ARE REQUIRED. SWM FACILITY B's BARREL REQUIRES TWO (2) COLLARS.
B. THERE SHALL BE A MINIMUM OF 10' OF SEPARATION, AND A MAXIMUM OF 28' OF SEPARATION, BETWEEN
THE TWO COLLARS PROPOSED ALONG SWM FACILITY B's BARREL.
C. ANTI -SEEP COLLARS& THEIR CONNECTIONSTO THE BARREL SHALL BE WATERTIGHT& BE IN ACCORDANCE
WITH VA DEC, DESIGN SPECIFICATION APPENDIX B, FIGURE B-2. SEE THE DETAIL ON THIS SHEET.
D. COLLAR DIMENSIONS SHALL EXTEND A MINIMUM OF 2'IN ALL DIRECTIONS AROUNDTHE PIPE. SWM
FACILITY B's COLLARS SHALL BE A MINIMUM OF 5'x5'.
E. COLLARS SHALL BE PLACED A MINIMUM OF 2' FROM PIPE JOINTS UNLESS FLANGED JOINTS ARE USED.
' PROPOSED FLAT VDOT CLASS AI RIPRAP
\
LINED OUTLET PROTECTION WITH FILTER / ( FABRIC UNDERLAYMENT TO EXTEND TO THE
/ I CHANNEL'S BANK. RIPRAP TOP ELEV=424'.
/ \ (L=5', WI=2', W2=5', D=1.5'
TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY ' \
/ EMBEDDED 6" INTO AN 3.8" THICK REINFORCED CONCRETE
\ FOUNDATION THAT IS 4'x4, AND BURIED BELOW GROUND. \
I
PROPOSED 024" HDPE STANDPIPE WITH A RIM /
ELEVATION OF 437.50' SHALL SERVE AS THE
RISER STRUCTURE. RISER SHALL BE SET IN A
REINFORCED CONCRETE FOUNDATION & HAVE
A 03" LOW -FLOW ORIFICE WITH AN INVERT
ELEV. AT THE LOW POINT OF THE BASIN a
O
(434.00'). RISER TO INCLUDE STATE APPROVED / -A 2'
TRASHRACKS ON ALL ORIFICE OPENINGS. SEE
VSMP AMENDMENT #3's APPROVED SHEET 9 O
FOR TRASHRACK DETAILS, OR EQUIVALENT. 0
\ ul.
CP
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\ /PROPOSED/ \
\ \,ALLEYWAY
RVE AS AC ESS Q 03
\ T THE DRY BASIN u'
03 z
APPROVED SLOPES HAVE BEEN
DETERMINED TO BE LESS THAN 25% \
IBASED ON TOPOGRAPHIC EXHIBIT Lc 6
SURVEY PROVIDED BY ROUDABUSH,
GALE AND ASSOCIATES AS PERMITTED
UNDER SECTION 30.7.4(b)h (TYPICAL)
\ \ \\ "oo i
v \�
"P
\ SEE THIS SHEET FOR SCALED
PROFILES OF THE DRY BASIN, TYP.
PROPOSED BASIN's FLOOR SHALL
\\ \ BE SLOPED TO DRAIN TO THE
\ RISER (o.5% MIN.) WITH POSITIVE
SLOPES THROUGHOUT.
CONTRACTOR SHALL CALL THE COUNTY
INSPECTOR & ENGINEERING DEPARTMENT \ \ \ \ DSO
24-HOURS BEFORE ANY ANTICIPATED
CONSTRUCTION ACTIVITIES FOR THE DRY BASIN.
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EXISTING MANAGED
STEEP SLOPES, TYP.
1
EXISTING PRESERVED
PROPOSED 56.25 LF OF STEEP SLOPES, TYP.
06" HID PE @ 14 7(2% \
(II=432.00',
IO=424.00') / \
/
PROPOSED 15' WIDE VDOT CL. Al RIPRAP
LINED EMERGENCY SPILLWAY wl 4:1 SIDE
SLOPES & FILTER FABRIC UNDERLAYMENT.
SPILLWAY CREST ELEV.=438.50'.
5' WIDE TOP OF DAM
\ ELEV.=440.00'
SWM FOREST & OPEN SPACE
EASEMENT (DB 04967, PG 233-3-34)
EASEMENT IS A BEST MANAGEMENT
PRACTICE & PROHIBITS FUTURE
DEVELOPMENT&DISTURBANCES
-PROPOSED VARIABLE WIDTH SWM
ACCESS & MAINTENANCE ESMT.
I
RAPHIC� \ I Y
( IN F'GI:I ,
inch = 1V ft.
VA DEO STORMWATER DESIGN SPECIFICATION INTRODUCTION: APPENDIX B: PRINCIPAL SPILLWAY
Concrete shall be
3000 psi concrete
!
3- n NOTES:
! I
1. Alin, clearance between rebor and
I outside face of color shall be Y.
2. Dimensions and bar J5 are design specific.
3. Cempact over -excavation to 95% density
per ASTM D-698
c y n 4. Collars should be placed a minimum of 2'
from pipe joints unless Ranged pipe
a = r joints are used,
64
Use side wall ands
bottom of trench
as form
No Scale
Rebar each way,
front and bock,
per IIM
NOTES:
Collar to be some 1. All materials to be in accordance with
Instal collar with gage as the pipe construction and construct'Ion manual
corrugations vertical with which R i3 uacd specifications.
2. Unassembled collars stroll be marked
by painting or tagging to identify.
Continuous weld 3. The lap between the two half sections
and between the pipe and connecting band
1/2"x2" slotted shall be caulked with asphalt mastic
Band -holes for 3/800 at time of installation.
bolts (typ) 4. Each collar shall be furnished with two
1/2' da. rods with standard tank lugs for
I2" iO D PON 6n piper► 6 �2" connecting collars to pipe.
1.
1 ITI I I Y
L2• Band IIIf EM
Continuous weld
Weld bath sides
Slotted holes Corru ed metal sheet
welded to center of
L+ B at $" C.C.
bond
EWffON OF UNASSEMBLfA COLLAR
B-2. Concrete Anti -Seep Collar
450 450
PROPOSED 024" HOPE STANDPIPE WITH A RIM ELEVATION OF
437.50' SHALL SERVE AS THE RISER STRUCTURE. RISER SHALL BE
SET IN A REINFORCED CONCRETE FOUNDATION & HAVE A 03"
LOW -FLOW ORIFICE WITH AN INVERT ELEV. AT THE LOW POINT OF
XISTIN THE BASIN (434.00'). RISER TO INCLUDE STATE APPROVED
GRADE TRASHRACKS ON ALL ORIFICE OPENINGS. SEE VSMP AMENDMENT
445 #3's APPROVED SHEET 9 FOR TRASHRACK DETAILS, OR EQUIVALENT.
PROPOSED RETAINING WALL �(
TOP OF WALL=446'
BOTTOM GRADE AT WALL=440' IDETOPOFDAM
BOTTOM OF WALL FOUNDATION-438' ELEV.=4 0.00'
440 \ 440
100-yr PEAK WSE=438.73
10-yr PEAK WSE=438.35
OACCORDAA SHALL INSTALL EMBANKMENT
2-yr PEAK WSE=437.44
IN ACCORNCE w/ THE NOTES AND
1-yr PEAK WSE=436.72
DETAILS SHOWN ON THE APPROVED SHEET 9.
j
N
�
435
�\
435
445
PROPOSE 1 HREATIC LINE (ASSUMES A
GRADE STARTING POINT AT THE PEAK
10-YEAR WSE WITH A 4H: 1 V SU
PROPOSED BASIN's FLOOR SHALL BE SLOPED THROUGH THE EMBANKMENT)
TO DRAIN TO THE RISER(°.5% MIN.) WITH DEFINES THE SATURATION ZONE,
POSITIVE SLOPES THROUGHOUT. l+30
TO PREVENT FLOTATION THE RISER BASE
SHALL BE FIRMLY EMBEDDED 6" INTO AN a8" PRC
THICK REINFORCED CONCRETE FOUNDATION GF
THAT IS 4'x4, AND BURIED BELOW GROUND.
APPROXIMATE LOCATIONS OF
PROP SED 56.25 LF OF PROPOSED CONCRETE COLLAR
425 06" HDPE @ 14.22% 4�5 FINAL LOCATIONS TO BE
(II=432.00', I0=424.00') DETERMINED BY THE CONTRAC
PROPOSED FLAT VDOT CI ASS Al RIPRAP LINED WHICH IS PARTIALLY DEPENDE
UPON THE LOCATION OF THE
OUTLET PROTECTIOIN WITH FILTER FABRIC
JOINTS. SEE THIS s
UNDERLAYME TTO EXTEND TO THE
'ANIT-SEEPAGE COLLAR
NOTE:
C ANNEL's BANK. R PRAP T P ELEV= 24'.
420 (L=5', 1=2', 2=5', D=1.5') 420 AND ITS FIGURE B-2.
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0+50 1+00 1+25
BASIN B SECTION
PROFILE
HORIZONTAL
GRAPHIC SCALE
5a _ 25 5. 1019
( IN FEET )
1 inch = 5C ft.
445
s'WIDETOPOFDAIV
)PE
ELEV =
40.00'
440
440
POSED -
LADE
1'
435
435
TOR,
�T
'IPE
430
430
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EXISTING
GRADE
-PROPOSED 15' WIDE VDOT CL. Al RIPRAP
LINED EMERGENCY SPILLWAY wl 4:1 SIDE
SLOPES & FILTER FABRIC UNDERLAYMENT.
SPILLWAY CREST ELEV. 438.50'.
0+50
BASIN B SPILLWAY
PROFILE
VERTICAL
GRAPHIC SCALE
'Ca 5 „ 2.5 5 1)
( IN FEET )
1 inch = 5 ft.
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JOB NO.
152118
SCALE
AS SHOWN
SHEET NO.
10
V ■ ■ ■ ■ - ■ ■■ � w PROPOSED WATER �\ 5 2 4 2 /
\ Q MA CHLINE - SE THIS T - �W LATERAL (LOTS 30 & 31) - - ^ > °
LOT 5 FKcN
SED WATER i/L LOT LINS Z42 SFA \ / 4 2 \791
i
_ 12/13/21 w�'
\ �o
° 1�
NEW SANITARY Ff lr _ _ 1 O2 \
Xx
SEWER LATERAL / / / T LOT 6 \ / « /
\ oo ° �
w °
i /r co °bo \ 42' SFA
T
■ ■ � ■ ■ ■ ■ 3 ■ � / / CFF�637 �0 a ¢61J
MATCHLINE - SEE T SHE T C / lI AR'.4Sg&� FE`4g83O 0 9 �\\ 4, 839 SF X oo
6�8
STEEP SLOPE NOTES: EXISTINGSANITARY DPRAINAGEESM'T -AR
1. FOR CONSTRUCTED SLOPES, THE MAXIMUM STEEPNESS IS 2:1 LATERAL TO BE 3 �/ ° ° F� \ 12 / e J
(HORIZONTAL: VERTICAL). DnIfOPk-2-7 EXTENDED° / / / `\\� \ / / , d\ X C \
2. FOR GRASS STABILIZATION ON CONSTRUCTED SLOPES, THE ISE RIM FROM
MAXIMUM STEEPNESS IS 3:1. SLOPES STEEPER THAN 3:1 MUST ELEV.453. / / _ / -1 f d 101 \ / l J� X ��\ o f
BE PERMANENTLY STABILIZED WITH LANDSCAPING VEGETATION
HARDIER THAN GRASS, WHICH WILL NOT REQUIRE MOWING.
F- F-
i
L�T 28 \ \ ^ /-5 i %� \ �c42' SFA
Z w w
4
ACSA NOTES: j - / V r
1. NOTE: ALL WATER METERS SHALL BE ACSA / \ 8 S F 4i
O v u
_ X -
Lu Lu
APPROVED TRAFFIC -RATED METER BOXES. / PROPOSED GRADING / ,a / \ V�k PROPOSED 20' STORM ^ \ \ / / / / / \ a a
2. ANY UNUSED SEWER LATERALS FROM PHASE I / \ SEWER EASEMENT - \ / LOT 2< H w w
0' PI TE SANI Y j $ \ \_ \ - / / \ V) V)
WILL NEED TO BE ABANDONED. \ \�
SE R LATE / W R. RIM \ PROPOSED SANITARY LATERAL �_� A / / / / V � w w
10 \ % , I / 42 S17A �. Lu oc
55.45/ WITH SADDLE CONNECTION LOT 27 /
42' SFA + � 14
4,941 SFIce
(P) 1' CURB i A ` EXISTING SANITARY / 4,696 SF
CUT T " - \ LATERAL TO BE LOT 1 3
EXTENDED 42' SFA/
EXISTING D.I. / /'� i / A M 7 RAISE RIM FROM ELEV.446.52 4453 F
TO ELEV. 451.00
PROPOSED WATER O / / \ v ROPOSED "DOT STD TYPE IRIPRAP
/ '-
LATERALSFOR / X �� / /A v v v �- �LINEaCHANNELw/GEOTEXTILEFILTE v42� / v 1 v / N
/ O X �, AV.BRICIilMERLAYM1 NT.CHANNEL"TO M
LOT 33 & 34 Q / �, / \ A v A EXT ND TO EXISTING RIPRAP CH EL,
��35' Q z 0.22 S
EXISTING 20 A a 6
15' PRIVATE UTILITY V - \ v v v V �4.70-1�
DRAINAGE EASEMENT
EASEMENT O. 9 CFS
PROPOSED _-_\---`1 1 � v Na scaL D - .012\ FT
SWABSOPE?430%)FIRE HYDRANT &WATER LINE L \ \\
\ 4 /F
v v
NEW SANITARY
SEWER LATERAL 1 \ 7 Ate` �A ` AV �A / ���� 0�1 �F 8
� EX IS NG DITCH OUTFAL�
EX
ISTING \ v TO. STREAM
,
WATERLINE- / ��� A T A\ \\ \ ��v ��v �\ ��\ M
! �LATERAL LOT 32
PROPOSED WATER i - A A
X 1 \ `v ��A `v V _EXISTIN WALL / \/� M
NEW SA �. v L / / / ° . Cn
SANITARY \ _ 4� - 4
YD G \, � SEWER LATERAL � \ / / �'� � � _ / � / ° �� \ N
\ \ �.,A A PRESERVED STEEP SLOPES 'UQF 23 / - C) Lu
PROPOSED 10' \ /
/ PRIVATE STORM \� \ \z �\ A \ / - 50 SFA N
/ X SEWER EASEMENT \ i \ \ �\ 3 SF--
4 69
I \ \\ V A / --__- V / / %
L0�
32 �v ° + Z
� LuW
Q
vv r v �_ vv v v / A 50' SFA _J a
v
o
\ \ 3 9 _ 2 SF
°
�v
V �
ui
NOTE:
WITH THE CONSTRUCTION OF THE
HOMES, THE CONTRACTOR SHALL TIE THE / 0 O �/ v A / �j ` A \
\ � �`� MANAGED STEEP SLOPES
ROOF & FOUNDATION DRAINS FOR LOTS / A / \ V A / _ - -LOT 21 /
\ ' / \ \ \ - .,, / PROPOSED SEGMENTED RETAINING WALL S\ / - _ Q
YD 33 & 34 INTO THE YARD DRAIN SYSTEM / A / X ° V A / 4Q -SF� I
� i � �� \ \ � � HEIGHT=6' FROM GROUND TO TOP OF WALL \ \� _ Y
YD G- CO D ALONG LINDLEY PLACE. y � , A i A �
i VAR. WIDTH PRIVATE ��A \ _ TW=446, BG=440 \ - \ / _ _ - - _ / 7, 21 8 S / U
UTILITY EASEMENT \ \ \ BOTTOM WALL=438 _
A \ v v vrl)F
TEMPORARY GRADING EASEMENT FOR F �\ �\ 3 \ V v V � / - Q
PUBLIC USE UPON DEMAND OF THE COUNTY ` T - __ --
\ NEW SANITARY V A _ }\
\ SEWER LATERAL \\ \ \ ` \ / , \ - - `
\
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VAR.WIDTH SWM : \V L6T- U) �O
FACILITY EASEMENT \ V ` v \ �O- F-
Lu
6,877 SF W
. \ `
/ PROPOSED DRY GRASS RETENTION
- FACILITY. SEE WPO AMENDMENT PLAN FOR '\` V A \ 'v V� \ \ - - - - U)
SWM FACILITY DESIGN AND DETAILS.
DRAINAGE DESCRIPTIONS
STIR. NO.
PIPE INFORMATION
INLET INFORMATION
COMMENTS
DIA.
(in.)
LENGTH
(ft.)
SLOPE
(%)
INVERT
IN
INVERT
OUT
MATERIAL
INLET TYPE
Curb
Type
SLOT
LENGTH
RIM
ELEVATION
YD C
12" YARD DRAIN
458.00
C-B
8
17.45
0.57%
454.72
454.62
HOPE
YD B
12" YARD DRAIN
-
457.80
B-A
8
20.40
0.59%
454.62
454.50
HOPE
YD A
12" YARD DRAIN
-
-
457.80
A-102
8
33.02
0.76%
454.50
454.25
HOPE
104
DI-313
-
10
458.71
VDOT STD. IS-1 REQ'D
103
15
90.43
0.91%
453.75
452.93
HOPE
102
MH-1
-
-
460.91
VDOT STD. IS-1 REQ'D
101
15
79.67
1.92°h
452.83
451.30
HDPE
YD G
12" YARD DRAIN
-
-
456.25
YD G-YD F
8
111.14
0.67%
450.25
449.50
HOPE
YD F
12" YARD DRAIN
-
-
450.85
YD F-YD E
8
47.74
0.67%
449.50
449.18
HOPE
YD E
12" YARD DRAIN
-
-
453.50
YD E-YD D
8
47.32
11.74%
449.18
443.50
HOPE
CO D
12" CLEANOUT
-
-
445.75
CO D-OUT
8
1 11.63
14.30%
1 443.50
1 443.00
1 HOPE
Lu
THESE SLOPES HAVE BEEN DETERMINED LESS THAN 25% `\ \ \ `\ ` \ -\� - - --- -\_ ZD
\ \ - - PER NEW TOPOGRAPHIC SURVEY AND SLOPES EXHIBIT PROVIDED BY \ \ \ \ �_/_ Q Q
\ ` /br• \\ - \ ROUDABUSH, GALE, AND ASSOCIATES DATED MAY 18, 2017, AS \ \ \ \ - - (D
\ \ JI PERMITTED UNDER SECTION 30.7.4(b)(h)
O
v 4-2
O
\ AV PROPOSED VDOT STD. TYPE I RIPRAP--
\ V LINED CHANNEL w/ GEOTEXTILE FILTER �y _
FABRIC UNDERLAYMENT. CHANNEL TO
\ EXTEND TO DRY GRASS RETENTION AREA u
MH15 w F_
\ \ L=75' Q z 0.28 CFS _ o w
\ -
\\ o _6,. V z 5.50 FPS aI ul
X
Q ,0 0.35 CFS JOB NO.
D ,0.22FTRIPRAP 0
GRAPHIC SCALE 152118
i
SWALE (SLOPEp30%)
` \ \ _ No SCAL z° ° ,° z° a° e° \ - \ / ` � � � \ , _ SCALE
IN FEET) - SHEET NO.
1 inch = 20 ft.