HomeMy WebLinkAboutWPO201700052 Plan - VSMP 2021-09-14'Hal��i�/;7 rl f�`r�yY�1Cy
OWNER/APPLICANT.•
06100-00-00-165RO
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 RESIDENTIAL (BY -RIGHT) - NO PROFFERS
AIRPORT IMPACT AREA (AIA)
PROPOSED USE:
PHASE I -
16 SINGLE FAMILY ATTACHED UNITS AND
12 SINGLE FAMILY DETACHED UNITS
PHASE H - 3 TOWNHOUSES & 3 SINGLE FAMILY DETACHED HOUSES
REQUIRED DENSITY:
4 DU/AC CLUSTER DEVELOPMENT
(NO MINIMUM LOT SIZE)
PROPOSED DENSITY:
PHASE I - 28 UNITS
PHASE ll - 6 UNITS
TOTAL - 34 DLl/8.62 AC = 3.94 UN173'/AC
OPEN SPACE.•
RED. 2.16 AC OF DEVELOPMENT AREA (25%);
PROV.• OPEN SPACE A (0.05 AC) + OPEN
SPACE B (2.55 AC) = 2.60 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 I - CURB & GUTTER (PARKING ON ONE SIDE ONLY)
PHASE // - UNITS FRONTING RIO ROAD & DUNLORA DRIVE NTH
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
LIGHTING.
NO LIGH77NG IS PROPOSED
PHASING
THIS PLAN IS PHASE // OF DUNLORA PARK (WINTER OF 2021)
RECREATION:
2.60 ACRES OPEN SPACE (PASSIVE RECREA7ON AREA)
PARKING.
PHASE // 2 OFF-STREET PARKING SPACES SHALL BE PROVIDED 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 SITES
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 PORTION OF A WPO STREAM BUFFER LOCATED AT
THE SOUTHEAST CORNER OF THE SITE. THERE IS NO 100-YEAR
FLOODPLAIN LIMITS ON THE SUBJECT PARCEL, PER FEMA MAP
51003CO229D, FEBRUARY 4, 2005.
OFFS17E DISTURBANCE:
NO OFFSIDE DISTURBANCE IS PROPOSED WITH THIS PLAN, EXCEPT
FOR THE TIE-IN CONNECT70N TO THE SANITARY SEWER
WITHIN EXISTING 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 DEDICA770N. 1.16 AC. (147) A
u,ncn vinnc once. 1
ROADWAY= 29,600 (PHASE /) + 6,974 (PHASE ll) = 36,574 SF (0.84 AC) r
SIDEWALK/DRIVEWAYS= 21,188 (PHASE l) + 1,267 (PHASE ll) = 22,455 SF (0.52 AC)
UILDINGS= 63,700 (PHASE /) + 7,955 (PHASE //) = 71.655 SF (1.64 AC)
ITE
TRIP GENERATION. TRAFFIC IMPACT NUMBERS ARE BASED ON THE ITE TRIP GENERAT70N
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 RATE - 28 VPH (18 ENTER/10 EXIT)
PHASE lh
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 ENTER/2 EXIT)
SLOPES: THIS S17F 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.
LIGHTING. 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 PROVIDED ALONG THE ROADWAYS FOR FIRE PREVENTION
AT A MAXIMUM SPACING OF 500 FT PER TRAVELWAY.
EXISTING FIRE FLOW 1135 GPM WITH 66 PSI PRESSURE.
STORMWATER MANAGEMENT -
PHASE I- PHASE I AND ITS DA A' HAVE NOT BEEN MODIFIED. THE APPROVED WPO 201700052 AMENDMENT #3
PROVIDES STORMWATER QUANTITY TREATMENT FOR PHASE I THROUGH A DRY DETENTION BASIN (SWM FACILITY A). THIS
APPROVED WPO 201700052 AMENDMENT #3 ALSO PROVIDES STORMWATER QUALITY TREATMENT FOR PHASES I AND ll
THROUGH RECORDED SWM FOREST & OPEN SPACE EASEMENTS AND A NUTRIENT CREDIT PURCHASE.
PHASE //- PHASE // AND ITS DA B' HAVE BEEN UPDATED TO MATCH APPROVED SDP 202100023, WHICH IS A MAJOR
SITE PLAN AMENDMENT TO SDP 201800002. PHASE // IS NOW LESS IMPERVIOUS AND STORMWATER QUALITY TREATMENT
PROVIDED UNDER APPROVED WPO 201700052 AMENDMENT #3 REMAINS SUFFICIENT. FROM A STORMWATER QUAN77TY
STANDPOINT, THIS AMENDMENT PROPOSES TO REPLACE THE APPROVED UNDERGROUND DETENTION SYSTEM IN PHASE I/
WITH A NEW DRY DETEN7ON BASIN (SWM FACILITY B). CALCULATIONS HAVE BEEN PROVIDED SHOWING THE PHASE It
POST -DEVELOPMENT PEAK OUTFLOWS ARE LESS THAN THE PREVIOUSLY APPROVED PEAK OUTFLOWS.
JLAAAAAAAA
DUNLORA OVERLOOK
VSMP AMENDMENT #4
WPO 201700052
(AMENDMENT #4 TO WPO 201600058)
RIO MAGISTERIAL DISTRICT ALBEMARLE COUNTY, VIRGINIA
SCALE: 1"=60'
OWNER
DUNLORA INVESTMENTS, LLC
455 SECOND STREET SE, SUITE 400
CHARLOTTESVILLE, VA 22902
ENGINEER
COLLINS ENGINEERING
200 GARRETT STREET, SUITE K
CHARLOTTESVILLE, VA 22902
VSMP AMENDMENT #4 PROPOSED CHANGES:
1
A 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 AMENDMENTTO 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').
n
O
�\e
U13aburnWM
m
�� Oonloa Or
s,
Pp�r
0 ds Rrdye�
UyChumh I&
o` Cha �Williaryp
QJ
O
ChhilottesMi
Techdcal Unter
f
e
JohnW Wamefpa�,NaY - 0
Rlaec a
VICINITY MAP
SCALE: 1" = 500'
SCOTTIR. CBLLIN.
0cw A°' V
Lic. No. 035791
04_ 8/25/21
AU10. "
Sak'y Peseamn '
ro,
9 H'llliam D*
"�slrys RP�I'"
/®
STORMWATERmwm
• •'
STORMWATER MANAGEMENT NOTES & DETAILS
3 TOTAL NUMBER OF SHEETS
*INDICATES SHEETS THAT WERE EXTRACTED FROM THE APPROVED WPO
201700052 AMENDMENT #2
** INDICATES SHEETS THAT WERE EXTRACTED FROM THE APPROVED WPO
201700052 AMENDMENT #3
PREVIOUS DUNLORA PARK PLANS:
1. SUB2021-00082
2. SUB2019-00172
3. SDP2018-00002
4. WP02016-00058
5. WP02017-00035 (AMENDMENT #1)
6. WP02017-00052 (AMENDMENT #2)
7. WP02017-00052 (AMENDMENT #3)
EROSION & SEDIMENT CONTROL LEGEND
LIMITS OF LAND DISTURBANCE
�4 DIVERSION DIKE
BOUNDARY LINE
SILT FENCE
DIRECTION OF FLOW
653.75 PROPOSED CONTOUR
DRAINAGE DIVIDE
SOILS LINE
MANAGED SLOPES
PRESERVED SLOPES
STREAM BUFFER
0 OPEN SPACE PRESERVATION
SITE PLAN LEGEND
- EXISTING CULVERT
0 CULVERT
DROP INLET
CURB
CURB & GUTTER
PROPOSED PAVEMENT
PROPOSED PERM PAVERS
I
I
SAFETY FENCE PER VESCH 3.01
CE CONSTRUCTION ENTRANCE PER VESCH 3.02
SF SILT FENCE PER VESCH 3.05
IP INLET PROTECTION PER VESCH 3.07
DD DIVERSION DIKE PER VESCH 3.09
SB SEDIMENT BASIN PER VESCH 3.14
OP OUTLET PROTECTION PER VESCH 3.18
gT SOIL STABILIZATION MATTING VESCH 3.36
DRIVEWAY CULVERT
- MOT STANDARD STOP SIGN
:oo EXISTING CONTOUR
PROPOSED CONTOUR
240.55 PROPOSED SPOT ELEVA RON
.-1
N
rq
N
Z
W
W
Z
l7
z
w
ul
z
ti
M
C'M
N
M
O
N
N
a
L
J
_J
W
0
a
U
i
Lu
w
Lu
U)
Lu
clf
CD
O
N
z
Lu
0
CW
G
Q
C�
G
0
0
rylo
W
0
LL
0
z
0
Lu
O
U
JOB NO.
152118
SCALE
AS NOTED
SHEET NO
1
0
0
/ N/F NOTES:
1 XISTING ROADSIDE DITCH PROPERTY LINE (TYP. CLUB DUNLORA, LLC. 1. IMPROVEMENTS SHOWN HEREIN ARE APPROVED PER DUNLORA PARK ROAD & UTILITY PLAN SUBzo16-zo6 AND DUNLORA PARK
PARCEL: 6zF-Ai VSMP PLAN WPO-2017-35 (AMENDED FROM WPO-2oa6-58). NTH QF�
1 I (D.B. 3574, PG. 668) z. EXISTING ON -SITE EASEMENTS AND FOREST AND OPEN SPACE ARE RECORDED UNDER SUBDIVISION PLAT BY ROUDABUSH, GALE,' f�
1 1 1 \ R-4 RECREATIONAL CLUB AND ASSOCIATES, D.B. 4967, PG a33. O
1 1 3. THIS PROJECT IS NOT LOCATED WITHIN FLOODPLAIN LIMITS, BASED ON FEMA MAP NUMBER 51003CO229D, DATED FEBRUARY 4, r
I 1 ` zoos. SCOTT R. COLLINS Z
4. TOPOGRAPHY& BOUNDARY INFORMATION PROVIDED BY ON -GROUND SURVEY BY CARDINAL SURVEY IN SEPTEMBER 2oa6, AND U Lic. No. 035791,E
I / — L, FROM DEEDS AND PLANS OF RECORD. SLOPES HAVE BEEN DETERMINED LESS THAN 25%WHERE INDICATED PER NEW o
—/ — — —� / S HWARTZMAN, JOEL & ZIVA TOPOGRAPHIC SURVEY AND SLOPES EXHIBIT PROVIDED BY ROUDABUSH, GALE, AND ASSOCIATES DATED MAY 18, zoa7, AS �A w�
PARCEL: 6zF-a5 PERMITTED UNDER SECTION 3o.7.y(b)(h). ONAL Gl
D.B. 4679, PG. 643) 5. MANAGED AND PRESERVED STEEP SLOPES EXIST AS SHOWN ON THE PROPERTY. t E�
I I / /7 1 I \ \ \ R_ RESIDENCE 6. THERE IS A PORTION OF A WPO STREAM BUFFER LOCATED AT THE SOUTHEAST CORNER OF THE SITE.
7. THE PROPERTY IS 8. THE PROJEC ZONIINGISROT C4ANDAIRPORT IMPACT AREA (AIA).ATED WITHIN A DAM INUNDATION ONE.
APPROVED 1 " RCP ENTRANCE CULVERT \ \ \ \
TO DIVERT UPSTREAM ROADSIDE EVERG F�1 HOME \ \ A \ A DAMES, DAVID 62 REGINA
5 BUILDE�S�- i �� `� A \�� ��� A (DPBR�EL:PG�6 8) z
DITCH UNDER NEW ENTRANCE x \ ,\ \ 35, 3 C7
I I PARCEL. 6zF-o4-1 DUNLORA INVESTME S LL �VER�EEN HOME \ \ \ RESIDENCE
1 I DB.499z, PG.7yg EVERGREEN HOME \� l \ BUILDERS \ \ \\ \ R_ ` w
BUILDERS \ PARCEL: 6z 4 7 \ \ \ \ \ \ \ \\ � Cl
\R-yRESIDENTIAL PARCEL:62 -04-8 \ \ \ \ m 00
PARCEL: 62F-o4-z / �B.yg67 PG. a33 %\ \ DB.4Sgz, PG.7n \ \\ \ \ v) \ \ zo' OFFSITE ACSA SANITARY w 4
DB.yggz, PG. 757 R-y RESIDENTIAL \ R- RESTDNTIAL \ \ EWER EASEMENT 1° 00 °�
R- RESIDENTIALVEVERGREENHOME \ ���\ \ \ �4 V S C. A i 4 o i.
BUILDERS \ ` \ \ w \ D.B. 4931; PG d � p p p
APPROVED -- / \ \ \ \ \ \ HERSON, MICHAEL OR CAROLYN z w w w
APPROVED STREET V PARCEL:62F-o A �� / PARCEL: \ w Q Q Q
WAT. LATERAL 4 3 / / / \ \ \ \
TREE (TYP.) (TYP.) DB•499z, PG. / \ \ \ \ \ \ 'v.B. 3zzo PG. 313) \ � p p p
R-4 RESIDENTIAL i / \ UNL RA I VEST EN LLCV A \ w ¢ w O O
APPROVED SIDEWALK T \ - — -/ / / \ PARCEL. zF-64-g \\ \ \ S R-4 RESIDENCE Z \ \ WHEELER, THOMAS OR MARY k v z z o
\ A V A PARCEL:6zF-7 p w
`AZD4 RESIDENTIAL \ \\ \ \\\ \ \ 2 a z p O w
/ APPROVED- \ \ / / / \ ;� s (D.B. z1o1 PG. y63) m a z 0
SAN.LATERAAL - \� � - �.aw R-4RESIDENCE m F-
o c�
CITY OF CHARLOTTESVILLE ��
PARCEL:61-16 __DUNLORA INVESTMENTS LLC (TYP.) \ \ \ �\ yy
9 w PARCEL: 62F o4 4 \V A \ \ \ A .�. O
D.B. 6zz PG. z) Q V �� , \ O w
( 4 5 3 O DB.4967, PG. 233 Q \ \\ _ �..� u p O O Z
R-4 ROADWAY &VACANT LAND Q / J R-4 RESIDENTIAL \ \ / \ \\ \ \ \ \\ \ \ \ V w o
O~ / + \� j / \ EXISTING PRESERVED 1�1 w a a U
3 L \ \ \\ \ �\ \ STEEP SLOPES O W p p w
Dl�NL RA NVEST NT LLC\� �\ \ > u w a
k 7'j DUNLORAINVESTMENTS LLC - 1\ \ (n
RC L:6F-o ao p
\ _
J �e PARCEL: 62F-04-5 \ \ 4 67, PG.. 1 1 \ \ \ W � uwi
DB.4967, PG. a33 / \ I \ \\ \ \ \ p w
R-y RESIDENTIAL \ R- RE IDE TIA \ \ \ \ \
w
CROSS, WHITMAN OR JOY LEVICK
C 460 \ 1 w
� PARCEL: 6zF-13 �
\ \\ (D.B.175z, PG. 455)
DUNLORA INVESTMENTS LLC \ \��� \ \ \ \ V \ \ R-4 RESIDENCE
PARCEL:6zF-o4-6
/ DB-4967, PG.
R- RESIDENTIAL t
APPROVED 4' WIDE a' DEEP V-DITCH / / \ \ 4 / x ` \ \ \ \ \ \ \ \
TO CONVEY UPSTREAM FLOW TO THE STREAM `� �L x \ \ \ \ \
/ + x �L QJ�� ib 8 `\� � DUNLORA INVEST ENTS\LL \/ \ \ �\ \ \^ 00 00 00 00 00
/ P PARCEL:6£F-o4-11 \ /
PHASE LINE \�� \ \ / \ DB-407, PG. a33 75' WP \ STREAM �U�F�I�ER
(�i \ \ rn m
�4 RESIDENTIAL \ \ \ r ^� u�i n
DyNL RO \ I� ST�Ef�S
EXISTING EOP / / \ / PARCEL: 6zF-o4�z8 / \ -�� /\ \ \ /: \� LEVIN, JULIUS OR ETTA
DB.4967, P 3 VAPPROVED �� �i / PARCEL: 62F-12
\ \ R-4 RESIDENTIAL \ WAT. LATERAL APPROVED LORA INVESTM�FNTS LLC \� / \ / i \� (D.B. yo6o, PG. 598)
EXISTING x , �� (TYP.) 8" WATERLINE PARCEL: 62F-04-12 / �� \ R-4 RESIDENCE
PAINT LINE S ��� A + DB.4967, Yb.133
�\ NLOR NV ST4 TS LLCM R-4 RESIDENTIAL / / APPROVED
\ \ \
x PDB�E6 P • 1 3 D�NLORA INVESTM NTS LLC /� 18" YARD DRAIN'B'
R- RESIDE L\A RIM=444.00 A� \
�`. \ ti
k / v 4 \ / PARCEL: 6zF-o4-13 C'7
Cr S APPROVED �- �� \�� + \ DB.4967, PG.133
/ 8" SANITARY �k \ R 4 RESIDENTIA / A i ���
/ SEWER LA I VE EN TSL _
x PARC L: F-o z6
LORA INVESTMENTS LLB
V�\ DB.4�g67 P 13�� \� \ % /UNLORAINVESTMENTSLLC/� i PARCEL:6zF-o4-15
APPROVED GRADE LINES
A R-y RESId NTML �\ + , A PARCEL 6zF-o4-a4� �/ �B 4 PG.133 / / \� RICHARDSON, DAVID OR VICTORIA M
D6.4967, PG - a33 % / �R-4 RESIDE -/ �, PARCEL: 6zF-:Li
/ I �\ O R-4IRESIDENTIA ' \� (D.B. 4424, PG.509) ( W
DUN P A IlWES oy z��G + \ i / A� R-4 RESIDENCE
x DUNLORA INVESTMENTS LLC
DB.yg PG a 3 ���� /,APPROVED _� PARCEL: 6zF-oy-16
�� o A R-4RESID TIA a8"YARDDRAIN'A'� DB.4967,PG.133 o // A
DU�LOR INVEi
MENTS LL \ �� �� / � \ N Q
VAR. WIDTH PUBLIC _� /� \ \ yya.8o R-y RESIDENTIALI A CEL: 165 DRAINAGE EASEMENT \, \ x �/ �\ / -) J
DB. g67, P .16g1 D.B PG PG.a33 \ \ X +� i \ d
V ��U�LORA �V�EN�LC + LL
x , R-4 �ESIDE�ITIAL� 1 VA.. 6zF-oy \ i �N � T Q
I
\ \ R-4 RESID TIAL W 0
APPROVEG ENTAL APPROVED
/ \ �1� RETAINING WALL APPROVED 6" WATERLINE w �a / \�I/ // V PANGS, STEVE OR JOANNE
APPROVED SIDEWALK AND STREETTREESWILL BE �\ / - D LORA INVES NT�LLC + �� �( \ i
\ MAX HT. = 6' SAN. LATERAL I STORMWATER / \ PARCEL: 62F-10
x REVISED ALONG RIO ROAD IN ACCORDANCE WITH APPROVED PARCEL�i3F-o4-z �y \ \ U) 0
V A \ (TYP.) / 'ACCESS & MAINT. / A (D.B.167g, PG. 341) W
\ RIO ROAD IMPROVEMENT PLAN BY OTHERS. SIDEWALK AND STREET \ DB.4967, PG.1 " R- RESIDENCE
TREES ON RIO ROAD ARE INCLUDED IN THE SCOPE OF THIS PLAN. APPROVED SEGM�AL TW o R-4 RESIDENTIAL \� EASEMENT \ \ 4 Lu
\ W �� D.B.67, PG 133
\\ �I RETAINING WALL \ 434 \ / I I A Q
MAX HT. UNILORA INVES!ME 4TS LL A DUNLORA �NVESTME�� �� !/_
THESE SLOPES HAVE BEEN DETERMINED LESS THAN z5% A \ -\ / /P IBC 6zF-o 1
PER NEW TOPOGRAPHIC SURVEY AND SLOPES EXHIBIT PROVIDED BY \\
�ARiEL:6zF-o4-z 9, 4 7/ I I V
\\ DB.4967 P��0�� k
\ ROUDABUSH, GALE, ANDASSOCIATESDATED MAY18,7.4(bAS. �\\, \,\ \ \� J R-yRESIDENTIAL'' / R-BRESIDENTIAL
PERMITTED UNDER SECTION 30.7.4(b)(h) \ \
V A V � /
O
\ x \ \ A �LORA INVESTMENTS LLC , \ rn A ��. i
V A \ PARCEL: 6zF-o4-z1 �� + \ �� \ Y Q
/DW\ (/ I`�
\APPROVED SWM FOREST& \ R-y51DENTIAL' \ I\
\ \ APPROVED W
\ \ OPEN SPACE EASEMENT \ / PUNLORA INVESTM NTS� LLC e
\\ \ \ \ \ (FROM DUNLORA PARK \ \ \ \ ��\ PARCEL: 62F-o4-18 _SWM FACILITY \ _ u
�ADPLAN=a.o9ACRE5� \ DUNLO ESTICRENTS� 4RgS1DE�TIAL
V / � � � � / SWM FACILITY
V \\ V EASEMENT Z
RIO ROAD CURB \ \ 1 \\ \ \\\\\\� / PARCEL: 6zF o4-ae- \ / / / W --
A � A TW 4z -f� DB. 3j �� � D.B.4967, PG.a33 i ✓ /
\ \\ 49 Lu
AND GUTTER L A % _
_ 420 � R-yRESIDENTIAL � UNLORAINVESTME LLC � / / � �� �- � -� - � LL.I � I
(BY OTHERS) \ \ �- \\�\\ \ \ / /� / \ �' Cn
— —� _ 4- BAR EL: 6zF-o4-1 _ _ / / \\ LLB
EXISTING MANAGED
�� —� STEEP SLOPES \� --D649f/ PG 133 / APPROVED SEGMENTAL //// WILLIFORD,JASON M iG
C4RE-RE\ RETAINING WALL o // j OR KWAMINA / \ \ \ \ z W
MAX HT. =6' / / ��1 PARCEL:6zF-9 W Lu
/
\f NIF �� \ �22� - 41z / / R SIDE PG
\ LAWRENCE E. MARTIN, JR. �� \ — / / 1 /�� W
WETSEL, THOMAS D LIFE ES TA \ \\ \ cc PARCEL: 6a-165C
PARCEL: 61-167 \ x \� yP (D.B. 4552, PG. a5) i ( � g \
(D.B.2688, PG. 564) �� sa v _ R-4 RESIDENCE \ v ��
R-4 RESIDENTIAL moo. \ — _ _ \ \ \' \ \ Q
WILLIAM H. ROGERS JR. & \f
SHARYON L. ROGERS
a� PARCEL:61-165B �- �_ �,' w
(D.B.5z6, PG.43z) �� PARCEL:
2F-0 -A
\\ R-4 RESIDENCE 25' WPO STREAM BUFFER \ - —t- PARCEL: fizF-.133
D.B. 4967, PG.133 � � N/F
1 / \ R-4OPEN SP-ACE AUSER OMES, C. 0 _
WETSEL, THOMAS D & CLARENCE // \ SWM FOR &TSE OPEN \ d En
PARCEL:61-a67C \ \ / GRAPHIC SCALE \ // R.-'62F-C/
NTLAND.B. CEL: 1-2 i \ SPAC E SEMENT \ PG. 36 W JOB NO.
( 74) V D.B. 6 PG.a33_ V AA / � w 122071
R-4RESIDENTIAL so 0 15 M 60
/ \ NJF �'\ \ \: \ SCALE
WILLIAM L. SIBLEY \ �� � / /
� �� STORMWATER 1°=3O(
PARCEL:6a-1A ` _
IN FEET ) 6 5 MANAGE CCESS
(D.B. 1z4o, PG. 580) AND MAINTENANCE E
\ / 1 inch 30 ft. U SHEET NO.
R-4 RESIDENCE D.B.4967, PG.a33� \ \ \ H
I
GENERAL NOTES
1. THE OWNER/DEVELOPER OF THIS PROPERTY IS:
DUNLORA INVESTMENTS, LLC
455 SECOND STREET SE, SUITE 400
CHARLOTTESVILLE, VA 22902
2. THESE PLANS HAVE BEEN PREPARED BY:
COLLINS ENGINEERING, INC
200 GARRETT STREET, SUITE K
CHARLOTTESVILLE, VA 22902
TELEPHONE: (434) 293-3719 FACSIMILE: (434) 293-2813
3. SOURCE OF TOPO & SURVEY: ON -GROUND SURVEY PROVIDED BY CARDINAL
SURVEY IN SEPTEMBER 2016, AND FROM DEEDS AND PLANS OF RECORD.
4. ZONING: R-4 RESIDENTIAL
5. TAX MAP AND PARCEL NUMBER: TMP 61-165
6. USGS DATUM: NAD 83
7. LOCATION/ADDRESS OF PROJECT: DUNLORA DRIVE
8. PROJECT AREA: 8.62 ACRES
9. SITE PHASING: NONE
10. PUBLIC UTILITIES: WATER & SEWER
* COLLINS ENGINEERING SHALL NOT HAVE AUTHORITY OVER CONTRACTORS WORK,
SAFETY PRECAUTIONS, SCHEDULES, OR COMPLIANCE WITH LAWS AND
REGULATIONS. WE SHALL NOT ASSUME RESPONSIBILITY FOR ANY
CONSTRUCTION STARTED PRIOR TO PLAN APPROVAL.
EROSION & SEDIMENT CONTROL
MEASURES:
STRUCTURAL EROSION AND SEDIMENT CONTROL PRAC7ICES SHALL BE IN
ACCORDANCE WITH THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK.
STRUCTURAL PRACTICES USED IN THIS SEC77ON CONSIST OF THE FOLLOWING:
301 SAFETY FENCE.,
A PR07EC77VE BARRIER INSTALLED TO PREVENT ACCESS TO AN EROSION CONTROL
MEASURE. TO PROHIBIT THE UNDESIRABLE USE OF AN EROSION CONTROL MEASURE BY
THE PUBLIC. APPLICABLE TO ANY CONTROL MEASURE OR SERIES OF MEASURES WHICH
CAN BE CONSIDERED UNSAFE BY VIRTUE OF POTENTIAL ACCESS BY THE PUBLIC.
3.02 CONSTRUCTION ENTRANCE
A STABILIZED PAVED CONSTRUCT70N ENTRANCE WITH A WASH RACK LOCATED AT POINTS
OF VEHICULAR INGRESS AND EGRESS ON A CONSTRUCTION SITE TO REDUCE THE
AMOUNT OF MUD TRANSPORTED ONTO PAVED PUBLIC ROADS BY MOTOR VEHICLES OR
RUNOFF. CONSTRUCTION ENTRANCES SHALL BE INSTALLED AS SHOWN ON THE PLANS TO
REDUCE THE AMOUNT SEDIMENT TRANSPORTED ONTO PUBLIC ROADWAYS.
3.05 SILT FENCE.,
A TEMPORARY SEDIMENT BARRIER CONSISTING OF A SYNTHETIC FILTER FABRIC STRETCHED
ACROSS AND ATTACHED TO SUPPOR77NG POSTS AND ENTRENCHED, TO INTERCEPT AND
DETAIN SMALL AMOUNTS OF SEDIMENT FROM DISTURBED AREAS DURING CONSTRUCTION
OPERA77ONS IN ORDER TO PREVENT SEDIMENT FROM LEAVING THE SITE AND TO
DECREASE THE VELOCITY OF SHEET FLOWS AND LOW -TO -MODERATE LEVEL CHANNEL
FLOWS. THE SILT FENCE BARRIERS SHALL BE INSTALLED DOWN SLOPE OF AREAS WITH
MINIMAL GRADES TO FILTER SEDIMENT LADEN RUNOFF FROM SHEET FLOW AS INDICATED.
THEY SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND MAINTAINED IN
ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK (VESCH).
3.07 STORM DRAIN INLET PROTECTION:
A SEDIMENT FILTER OR AN EXCAVATED IMPOUNDING AREA AROUND A STORM DRAIN DROP
INLET OR CURB INLET. TO PREVENT SEDIMENT FROM ENTERING STORM DRAINAGE
SYSTEMS PRIOR TO PERMANENT STABILIZA77ON OF THE DISTURBED AREA. INLET
PROTECT70N APPLIES WHERE STORM DRAIN INLETS ARE TO BE MADE OPERATIONAL
BEFORE PERMANENT STABILIZA77ON OF THE CORRESPONDING DISTURBED DRAINAGE AREA.
3.09 TEMPORARY DIVERSION DIKE.
A TEMPORARY RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE TOP OR BASE OF A
SLOPING DISTURBED AREA. TO DIVERT STORM RUNOFF FROM UPSLOPE DRAINAGE AREAS
AWAY FROM UNPROTECTED DISTURBED AREAS AND SLOPES TO A STABILIZED OUTLET. TO
DIVERT SEDIMENT -LADEN RUNOFF FROM A DISTURBED AREA TO A SEDIMENT-7RAPPING
FACILITY SUCH AS A SEDIMENT TRAP OR SEDIMENT BASIN. USE WHEREVER STORMWATER
RUNOFF MUST BE TEMPORARILY DIVERTED TO PR07ECT DISTURBED AREAS AND SLOPES
OR RETAIN SEDIMENT ON SITE DURING CONSTRUCTION. THESE STRUCTURES GENERALLY
HAVE A LIFE EXPECTANCY OF 18 MONTHS OR LESS, WHICH CAN BE PROLONGED WITH
PROPER MAINTENANCE.
3.13 TEMPORARY SEDIMENT TRAP.
A TEMPORARY PONDING AREA FORMED BY CONSTRUC77NG AN EARTHEN EMBANKMENT WITH
A STONE OUTLET. TO DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS
LONG ENOUGH TO ALLOW THE MAJORITY OF THE SEDIMENT TO SETTLE OUT. USE BELOW
DISTURBED AREAS WHERE THE TOTAL CONTRIBUTING DRAINAGE AREA IS LESS THAN 3
ACRES, WHERE THE SEDIMENT TRAP WILL BE USED NO LONGER THAN 18 MONTHS, AND IT
MAY BE CONSTRUCTED EITHER INDEPENDENTLY OR IN CON✓UNC77ON WITH A TEMPORARY
DIVERSION DIKE.
J. 14 TEMPORARY SEDIMENT BASIN:
A TEMPORARY BARRIER OR DAM WITH A CONTROLLED STORMW47ER RELEASE STRUCTURE
FORMED BY CONSTRUCTING AN EMBANKMENT OF COMPACTED SOIL ACROSS A
DRAINAGEWAY. TO DETAIL SEDIMENT -LADEN RUNOFF FROM DISTURBED AREAS
IN "WET" AND `DRY" STORAGE LONG ENOUGH FOR THE MAJORITY OF THE SEDIMENT TO
SETTLE OUT. APPLIES BELOW DISTURBED AREAS WHERE THE TOTAL CONTRIBU77NG
DRAINAGE AREA IS EQUAL TO OR GREATER THAN THREE ACRES. THERE MUST BE
SUFFICIENT SPACE AND APPROPRIATE TOPOGRAPHY FOR THE CONSTRUC77ON OF A
TEMPORARY IMPOUNDMENT.
J.18 OUTLET PRO TECTION.•
STRUCTURALLY LINED APRONS OR OTHER ACCEPTABLE ENERGY DISSIPA77NG DEVICES
PLACED AT THE OUTLETS OF PIPES OR PAVED CHANNEL SECTIONS. TO PREVENT SCOUR
AT STORMWATER OUTLETS, TO PROTECT THE OUTLET STRUCTURE, AND TO MINIMIZE THE
P07EN77AL FOR DOWNSTREAM EROSION BY REDUCING THE VELOCITY AND ENERGY OF
CONCENTRATED STORMWATER FLOWS. APPLICABLE TO THE OUTLETS OF ALL PIPES AND
ENGINEERED CHANNEL SEC77ONS
J. 19 RIPRAP:
A PERMANENT, EROSION -RESISTANT GROUND COVER OF LARGE, LOOSE, ANGULAR STONE
WITH FILTER FABRIC OR GRANULAR UNDERLINING. TO PROTECT THE SOIL FROM THE
EROSIVE FORCES OF CONCENTRATED RUNOFF, SLOW THE VELOCITY OF CONCENTRATED
RUNOFF WHILE ENHANCING THE P07EN77AL FOR INFILTRATION, AND TO STABILIZE SLOPES
K17H SEEPAGE PROBLEMS, AND/OR NON -COHESIVE SOILS. USE WHEREVER SOIL AND
WATER INTERFACE AND THE SOIL CONDITIONS, WATER TURBULENCE AND VELOCITY,
EXPECTED VEGETA7VE COVER, ETC., ARE SUCH THAT THE SOIL MAY ERODE UNDER THE
EROSION CONTROL NOTES
ES-1: UNLESS OTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION
AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND
MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF
THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA
REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL
REGULA TIONS.
ES-2: THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO
THE PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE
COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO
THE FINAL INSPECTION.
ES-J.-ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR
TO OR AS THE FIRST STEP IN CLEARING.
ES-4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL
BE MAINTAINED ON THE SITE AT ALL TIMES.
ES-5.-PRIOR TO COMMENCING LAND DISTURBING AC77VI77ES IN AREAS OTHER THAN
INDICATED ON THESE PLANS (INCLUDING BUT NOT LIMITED TO, OFF -SITE
BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A
SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR REVIEW AND
APPROVAL BY THE PLAN APPROVING AUTHORITY.
ES-6: THE CONTRACTOR IS RESPONSIBLE FOR INSTALLAT70N OF ANY ADDITIONAL
EROSION CONTROL MEASURES NECESSARY TO PREVENT EROSION AND
SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
ES-7.-ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL
MEASURES AT ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING
SITE DEVELOPMENT UNTIL FINAL STABILIZAT70N IS ACHIEVED.
ES-8.-DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN
APPROVED WATER FILTERING DEVICE.
ES-9: THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES
PERIODICALLY AND AFTER EACH RUNOFF -PRODUCING RAINFALL EVENT
ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFEC77VENESS
OF THE EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
EROSION CONTROL NOTES
1. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE
PRE -CONSTRUCTION CONFERENCE, ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND
DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL INSPECTION.
2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED
ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND
SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION AND
SEDIMENT CONTROL REGULATIONS.
3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS
THE FIRST STEP IN CLEARING.
4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE
MAINTAINED ON THE SITE AT ALL TIMES.
5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON
THESE PLANS (INCLUDING, BUT NOT LIMITED TO, OFF -SITE BORROW OR WASTE AREAS),
THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO THE
OWNER FOR REVIEW AND APPROVAL BY THE PLAN APPROVING AUTHORITY.
6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION
CONTROL MEASURES NECESSARY TO PREVENT EROSION AND SEDIMENTATION AS
DETERMINED BY THE PLAN APPROVING AUTHORITY.
7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT
ALL TIMES DURING LAND DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL
FINAL STABILIZATION IS ACHIEVED.
8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING
DEVICE.
9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND
AFTER EACH RUNOFF PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP
TO MAINTAIN THE EFFECTIVENESS OF THE EROSION CONTROL DEVICES SHALL BE MADE
IMMEDIATELY.
10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA.
11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL
SHALL BE INERT MATERIALS ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER
DEBRIS.
12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER
ZONING ORDINANCE SECTION 5.1.28.
13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF
THE CODE OF ALBEMARLE.
14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL
BE LIMITED TO THE HOURS OF 7:OOAM TO 9:OOPM.
15. BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAN
MAINTAINS LATERAL SUPPORT, OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS,
PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS, AND DAMAGE TO ANY PUBLIC
STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE.
16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT
TO PERMANENT STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION
CONTROL MEASURES REQUIRED BY THIS PLAN REGARDLESS OF THE SALE OF ANY LOT,
UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY.
17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO
BE AT 75 LBS/ACRE, AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A
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.
STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO
APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR.
18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND
MULCH. AGRICULTURAL GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF,
INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL. FERTILIZER SHALL BE APPLIED AT
1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT SEEDING SHALL
BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND
0-5% PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED
AT 130LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE COUNTY EROSION
CONTROL INSPECTOR.
19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH
RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR
IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET STORAGE VOLUME
IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN NECESSARY
TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE
COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED
IMMEDIATELY.
20.ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED
WITHIN 30 DAYS OF FINAL SITE STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED,
SUBJECT TO APPROVAL BY THE COUNTY EROSION CONTROL INSPECTOR.
21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF
THE DATE OF APPROVAL. WATER PROTECTION ORDINANCE SECTION 17-204G.
22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9)
MONTHS AFTER THE DATE THE LAND DISTURBING ACTIVITY COMMENCED. (WATER
PROTECTION ORDINANCE SECTION 17-207B)
DESIGN FLOW CONDITIONS.
3.31 TEMPORARY SEEDING.,
THE ESTABLISHMENT OF A TEMPORARY VEGETA7VE COVER ON DISTURBED AREAS BY
SEEDING WITH APPROPRIATE RAPIDLY GROWING ANNUAL PLANTS TO REDUCE EROSION
AND SEDIMENTATON 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
PROTECTION TO BARE SOILS EXPOSED DURING CONSTRUC77ON UN77L PERMANENT
VEGETA7ON OR OTHER EROSION CONTROL MEASURES CAN BE ESTABLISHED.
3.32 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
FCONOMICAI _ A!)APTARI F TO .4ITF CONDITIONS AND AI I OWS .SF/ FCT7ON OF 77-IF MOST
APPHUPRIAIE PLANT MAIEHIALS. IU IMPHUVE WILULII HABIIAI. IU ENHANCE NAIUHAL
BEAUTY. UPON COMPLE77ON OF CONSTRUCT70N ACTIVITIES, ALL AREAS WILL RECEIVE A
PERMANENT VEGETA7VE COVER.
3.38 TREE PRESERVA77ON AND PROTECTION:
PR07ECT70N OF DESIRABLE TREES FROM MECHANICAL OR OTHER INJURY DURING LAND
DISTURBING AND CONSTRUCTION AC77WTY. TO ENSURE THE SURVIVAL OF DESIRABLE
TREES WHERE THEY WILL BE EFFEC77VE FOR EROSION AND SEDIMENT CONTROL,
WATERSHED PROTECTION, LANDSCAPE BEAU77FICA7ION, 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 TREE -INHABITED
AREAS SUBJECT TO LAND DISTURBING ACTIVITIES.
339 DUST CONTROL:
REDUCING SURFACE AND AIR MOVEMENT OF DUST DURING LAND DISTURBING, DEMOL177ON
AND CONSTRUC77ON 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
ACCORDACE WITH THE VESCH.
SOIL NDESCRIPTIONS
2C- ALBEMARLE FINE SANDY LOAM-7%TO15%SLOPES.
SOIL CONSISTS OF DEEP, WELL DRAINED SOILS. SURFACE RUNOFF IS MEDIUM TO LOW
WITH MODERATELY HIGH PERMEABILITY. HYDROLOGIC SOIL GROUP'C'.
226- CULPEPERFINE SANDY LOAM -2%TO7%SLOPES.
SOIL IS DEEP, WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM
WEATHERED FROM META-ARKOSIC SANDSTONE. HYDROLOGIC SOIL GROUP'B'.
39D- HAZEL LOAM - E.5% TO 25% SLOPES.
SOIL IS DEEP, WELL -DRAINED WITH MODERATE PERMEABILITY. FORMED IN RESIDUUM
WEATHERED FROM GREYWACKE SANDSTONE. HYDROLOGIC SOIL GROUP'B'.
TARIE JJ9-A
ANRFSD'E.4 USED MR DUST
CONTROL
W.H,
Appil®tion
AAM"Ne
.Onion
IAAAn.iwWne•)
Type or
NmIR 0a1A4a
Rau:
AnnnI
AaPiislt Ewwo,
7:1
Couaz Spray
um
Lays E.I
1251
Fine Spray
235
Resin in Wa¢r
4.1
Fine SI
3W
Acrylic Em III
(N...' )
7.1
Emu S"
450
AnTyX, Hmn4i.
(TABS.)
33:1
Coa-Spray
350
haled mratacdaa rtaa■tt far areal■ amtml Phm
VO4E 70' MIN.
EO ISFuICTR)n
ACCESS 3- SM-2A ASPHALT ROP
�COURSE R:
IX
- .. ffrS
V. 21A AGGREGTE BASE
PROF
oEM N.
SIOIE
CdElAIC110M ASPHALT PAVED
WASHRACR
ENmRG
2%. xx IN .I-:
I
1� 12' MN.• �-
•MIST EXTEND HALL a1a1N L-0 POSTIE DRNNAGE
V rD sCDwEHT
M helm IaD [VCR® /1 iRAPPINO DEVICE
CPER,rpN
ELM
12' OEITM ERNNP:.!
2x TO SEdMF
IRAPPIIAy' DE DEvi<low
r
.. rF c.c-i •'
SECTION A -A
DaeMuu WWIe tap of 1 u,h..t De.HLA rII Mi111 n nmwunin 1 nth IHMr.ck
III \'M'e ngphva a I,Tlh hnAe W dk a IYainda OI 14 allhe, Ill adentimle
...... I., puxnae W.AE Dee aaat I. awned .. fiom ae ellhma Io n
.ppl oceJ rLallz aea a. AY sminenl ,haE Le tna'eaM fiom
aulemlq =lamltms. OAchaa a7aewuXes
Olt.. Ankal
PAVED WASH RACK
AC SCALE
DESCRIPTION OF EROSION &a SEDIMENT
CONTROL MEASURES:
EROSION AND SEDIMENT CONTROL MEASURES:
IT IS ANTICIPATED THAT A CONSTRUCTION ENTRANCE, TEMPORARY DIVERSION
BERMS, RIGHT OF WAY DIVERSION, A SEDIMENT BASIN, SEDIMENT TRAPS, OUTLET
PROTECTION, AND SILT FENCE WILL BE INSTALLED TO CONTROL SURFACE
DRAINAGE. TEMPORARY SEEDING WILL BE USED IMMEDIATELY FOLLOWING ALL
LAND DISTURBANCE ACTIVITIES. TEMPORARY STOCKPILE AREAS WILL BE
MAINTAINED FROM TOPSOIL THAT WILL BE STRIPPED FROM AREAS TO BE GRADED
AND STORED FOR LATER SPREADING. STOCKPILE LOCATIONS SHALL BE ON SITE
AND SHALL BE STABILIZED WITH A TEMPORARY VEGETATIVE COVER. PERMANENT
SEEDING WILL BE PERFORMED FOR ALL AREAS WHICH WILL NO LONGER BE
EXCAVATED AND WHERE CONSTRUCTION ACTIVITIES HAVE CEASED. PERMANENT
SEEDING SHALL ALSO BE PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE
LEFT DORMANT FOR A YEAR OR MORE. SELECTION OF SEED MIXTURE WILL
DEPEND ON THE TIME OF YEAR APPLIED. TEMPORARY SEEDING WILL BE
PERFORMED FOR ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR MORE
THAN SEVEN DAYS. THESE AREAS SHALL BE SEEDED WITH FAST GERMINATING
VEGETATION IMMEDIATELY FOLLOWING GRADING OF THOSE AREAS. SELECTION OF
SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR APPLIED.
3.01 SAFETY FENCE - SAFETY FENCE WILL BE INSTALLED AROUND THE
PROPOSED SEDIMENT BASIN.
3.02 CONSTRUCTION ENTRANCE - ONE CONSTRUCTION ENTRANCE SHALL BE
INSTALLED AT THE EXISTING DRIVEWAY ON DUNLORA DRIVE. THIS WILL BE THE
ONLY POINT OF INGRESS AND EGRESS TO THE SITE. CARE WILL BE TAKEN TO
PROTECT ADJACENT ROADWAYS FROM TRANSFER OF SEDIMENT.
3.05 SILT FENCE- SILT FENCE WILL BE PLACED ON THE DOWNSTREAM SIDE OF
DISTURBANCE WHERE NOTED ON THE PLANS.
3.07 INLET PROTECTION - INLET PROTECTION SHALL BE INSTALLED ON EXISTING
AND PROPOSED STRUCTURES WHERE INDICATED ON THE PLANS.
3.09 TEMPORARY DIVERSION DIKE- DIVERSION DIKES WILL BE USED AROUND THE
PERIMETER OF SITE DISTURBANCE WHERE SHOWN ON THE PLANS TO DIRECT
RUNOFF TO ON -SITE SEDIMENT CONTROL FACILITIES.
3.13 TEMPORARY SEDIMENT TRAP- TEMPORARY SEDIMENT TRAPS WILL BE
INSTALLED WHERE SHOWN ON THE PLANS.
3.14 TEMPORARY SEDIMENT BASIN- TEMPORARY SEDIMENT BASIN WILL BE
INSTALLED WHERE SHOWN ON THE PLANS.
3.18 OUTLET PROTECTION- TO BE PROVIDED AT THE OUTFALL OF DRAINAGE
PIPES WHERE SHOWN ON PLANS.
3.19 RIPRAP- RIPRAP SHALL BE INSTALLED AS OUTLET PROTECTION WHERE
SHOWN ON THE PLANS.
3.31 TEMPORARY SEEDING- TEMPORARY SEEDING SHALL BE APPLIED WHERE
SHOWN ON THE PLANS.
3.32 PERMANENT SEEDING- PERMANENTLY SEEDING SHALL BE APPLIED WHERE
SHOWN ON THE PLANS.
3.38 TREE PRESERVATION AND PROTECTION- TREE PRESERVATION FENCING
SHALL BE INSTALLED WHERE SHOWN ON THE PLANS. NO TREES SHALL BE
HARMED OUTSIDE OF THE LIMITS OF TREE PROTECTION FENCING.
3.39 DUST CONTROL- DUST CONTROL SHALL BE APPLIED THROUGHOUT THE SITE
WHERE SHOWN ON THE PLANS.
STORMWATER MANAGEMENT:
STORMWATER RUNOFF QUANTITY WILL BE TREATED WITH ONE LEVEL II
BIORETENTION BASIN WITH DOWNSTREAM DETENTION. SEE STORMWATER
MANAGEMENT PLAN SHEETS.
MAINTENANCE.•
IN GENERAL, DURING CONSTRUCTION THE RLD OR CONTRACTOR ON -SITE WILL CHECK
ALL EROSION AND SEDIMENT CONTROL MEASURES DAILY AND AFTER EACH
SIGNIFICANT RAINFALL. MONITORING REPORTS WILL BE REQUIRED FROM THE RLD IF
NEEDED. SPECIFIC ATTENTION WILL BE GIVEN TO THE FOLLOWING ITEMS:
".SEDIMENT BASINS AND TRAPS WILL BE CLEANED AND MAINTAINED IN ACCORDANCE
WITH THE VIRGINIA EROSION & SEDIMENT CONTROL HANDBOOK.
b.ALL INLET PROTECTION AND GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR
SEDIMENT BUILDUP THAT WILL PREVENT PROPER DRAINAGE. IF THE GRAVEL IS
CLOGGED BY SEDIMENT, THE GRAVEL WILL BE REMOVED AND CLEANED, OR IT WILL
BE REPLACED.
c.ALL SILT FENCE BARRIERS WILL BE CHECKED REGULARLY FOR UNDERMINING OR
DETERIORATION OF THE FABRIC AND REPAIRED AS REQUIRED. SEDIMENT SHALL
BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHED HALF WAY TO
THE TOP OF THE BARRIER.
d.ALL SEEDED AREAS WILL BE CHECKED REGULARLY TO SEE THAT A GOOD STAND
IS MAINTAINED. AREAS SHOULD BE FERTILIZED AND RESEEDED AS NEEDED.
IN CASE OF EMERGENCY, THE PRIMARY CONTACT FOR THE PROJECT WILL BE THE RLD
OR CONTRACTOR ON -SITE. THE CONTRACTOR WILL BE DETERMINED AT THE TIME THE
CONTRACT IS AWARDED. IN ADDITION THE DEVELOPER MAY BE CONTACTED. UPON
COMPLETION OF THE PROJECT, THE OWNER WILL BE RESPONSIBLE FOR SITE
MAINTENANCE.
1. SET POSTS AND EXCAVATE A 4X4"
TRENCH UPSLOPE ALONG THE LINE
OF POSTS
FLOW
SAFETY FENCE
IIIINON I ---
so 0
MEN
�l:::::'.` �..}tee.. ;• {r CI. i:iti• � ::
PERSPECTIVE VIEW
PERSPECTIVE VIEW PERSPECTIVE VIEW
RUSTIC FENCE METAL FENCE
V1,0T Road and III SORI
IN 5
_ v
r
R ;
2. STAPLE WIRE FENCING TO THE POSTS.
m � i��!►�''ilhlt� 11id1
W VIA
►
`: 11PI11
��..o:�llll 1
SIL T FENCE
sF (WITH WIRE SUPPORT)
NOSCALE
La
SECTION A A
PIPE OUTLET TO FLAT AREA WITH NO DEFINED CHANNEL
La
d
' PLAN
SECTION A A
OP 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 8.62 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, AND DIVERSION BERMS. 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 II 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 Y
10. S H R E D AL Q N N R 0 F Ql
AI;II11 L S 9- 4 IT I F ST U U )
11. THE CONTRACTOR CAN CONVERT
THE SEDIMENT BASIN INTO THE PERMANENT STORMWATER MANAGEMENT FACILITY. SEDIMENT TRAP 1 SHALL
BE REMOVED AND AN UNDERGROUND DETENTION SYSTEM, WITH BYPASS STORM SYSTEM SHALL BE INSTALLED.
AT THIS TIME THE REMAINING PORTION OF THE STORM SEWER AND ALLEY WITH PARKING 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.
3 ATTACH THE FILTER FABRIC TO 4. BACKFILL AND COMPACT THE
THE WIRE FENCE AND EXTEND EXCAVATED SOIL.
IT INTO THE TRENCH.
a2
0_1
I FLOW
�1-I
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
SHALE
SLOP
TABLE 331-11
ACCEPTABLE
TEMPORARY SEEDING PLANT MATERIALS
-QUICK REFERENCE FOR ALL REGIONS"
Rate
njIBlllg Dates
ties
bs. acre
Sept. 1 - Feb. 15
50150 Mix of
Annual Ryegrass
(Lolium multi-Romm)
dE
50 - 100
Cereal (Winter) Rye
(Secale cerealel
Feb. 16 - Apr. 30
Annual Ryegrass
(Lolium multi-Mmm)
60 - IOD
May 1 - Aug 31
German Millet
(Selaria italic")
50
Source: Va. DSWC
TOTAL LBS
GENERAL SLOPE 13:1 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.)
P SILT FENCE DROP INLET
PROTECTION
T ET
n f
uRx FRIAE
l
STIER
PVT
V V PERSPECTIVE VIEWS
e.uRl� 6
IIIII
1
ELEVATION OF STAKE AND
FABRIC ORIENTATION DETAIL A
SPECIFIC APPLICATION
THIS METHOD OF INLET PROTECTION 1S APPLICABLE WHERE THE
INLET DRAINS A REUMIELY FLAT AREA (STEPS NO GREATER
THAN 5%) WIB:RE THE INLET SHEET OR OVERL4ND FLOWS (NOT
EXCEEDING 1 C F.S) ARE TYPICAL. THE METHOD SHALL NOT
APPLY TO INLETS HEMMING CONCENTRATED FLOWS, SUCH AS
Of STREET OR HIGHWAY MEDIANS.
0
CONCRETE IFLOCK
GRAVEL N F/L TER
OR#SCOARSEAGGREGATE.
O BLOCK& GRAVEL CURB INLET O
SEDIMENTFILTER 3.07s
NO SCALE
%2
snore: VA. DSWC
ALBEMARLE COUNTY
CONSTRUCTION ENTRANCE
333
RAW 33
.,.°^' '• PLAN VIHW
Rust COU D Nu. rE
OREM MW IDEESS WfRATNN
SEt 11/Y 1M1FR
X19RIM alp FRET
-
= XrowwT rH
=l9•
4' T LE SEE SORT fr a vAATMmT.
SECTION A -A
.I A III WAIF% TRAP IF +' IS HEARD
.. AYX. WSX HnEe M.. Of 1,1'
ePAVscut x2sED TEMP COW ENTR
9 CE
nILIII4NEAIA.
�S 1.�OTIIn.
� �l os. E
Tw.s'Nw.
GCAYATEO SONTl,'p
SILTFENCE
sF (WITHOUT WIRESUPPORT) Tns-=
Nosuee
ON SLOPES, STRIPS
N 7EC77VE COVERINGS
MAY BE APPLIED ACROSS BERM
THE SLOPE. FIIf=III=111-
WHERE THERE /S A BERM AT THE TOP OF THE SLOPE �IIf=III=111-
BRING THE MATERIAL OVER THE BERM AND ANCHOR /i I T KI i ffi=III=IT-
BEHIND THE BERM. KIIfEILEIII III III
iE
_ �uelll III III=III I
I kueuelll III ITi III u_
-I �ukllllm m=m m=u
a • l =ITi a l-I I'
-III, Lh I�.
BRING MAT£Rd4L DOWN TO A LEVEL AREA BEFORE STEEP
TERMINA77�JG THE INSTALLATION, TURN THE END SLOPE
UNDER 4 AND STAPLE AT 12 INTERVALS.
12"
IN DITCHES APPLY PROTECTIVE COVERING
PARALLEL 10 THE DIRECTION OF FLOW.
USE CHECK
THE CENTER AVOID
F ID
THE DITCH IF AT ALL POSSIBLE.
ON SLOPES APPLY
PR COVERING PARALLEL
TO THE DIRECTION OF FLOW
AND ANCHOR SECURELY.
'I�L�� �111�LPLl�LIJ
IIII-IIdIIdIId IL-
gIM SOIL STABILIZATION BLANKET NOTE.•
TREATMENTz SOIL STABILIZATION MATTING MATERIAL SHALL BE INSTALLED AS
NOSGLE REQUESTED BY THE ALBEMARLE COUNTY EROSION CONTROL INSPECTOR
Lic. No. 035791
8/25/21
J
EI
m
Z(f)
J
OF-
F-
LU
w
.H
N
In
N
L9
z
w
J
J0
ti
co
M
N
C`7
l
N
CD
N
\N
LU
J
J_
LU
0
C)
LU
I-
D
U)
LU
LU
U)//L//L�
LU
0
C)
C)
N
LU
LU �<
I..L
Q
z z
W J
0
<
^
I..L O
2:U
LU
� z
PI
Oo
LL v /
LU 06
00
9 ^
O
O w
w
J
F
H F
'LI w
w
0- En
JOB NO.
152118
SCALE
N/A
SHEET NO.
3
v u I NOTE: LEGEND LEGEND
CONCROUTAREA ♦� • ■ • ■ ■ ■ ■ ■ ■♦ ,� z. TOTAL LIMITS OF DISTURBANCE PROPOSED WITH THIS PLAN = Tog ACRES.
�• ♦ 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
1 H RACK ..� S F TP TREE PROTECTION FENCING. FENCING AND LOD SHOWN SEPARATELY IN THIS �� DIVERSION DIKE CE CONSTRUCTION ENTRANCE PER VESCH 3.02
i . PLAN FOR GRAPHICAL PURPOSES ONLY. NO DISTURBANCE IS PERMITTED BOUNDARYLINE
OUTSIDE OF THE LOD o o SILT FENCE SF SILT FENCE PER VESCH 3.05
_ \ DIRECTION OF FLOW INLET PROTECTION PER VESCH 3.07
�
653.75 PROPOSED CONTOUR
3 `
■ I ■ ■ ■ ■ ■ DRAINAGE DIVIDE DIVERSION DIKE PER VESCH 3.09
DD
C
_ _
_ " D \ \ \ - - - SOILS LINE
�• / S " "� TP \ —_ — MANAGED SLOPES SB SEDIMENT BASIN PER VESCH 314
12 " O I I N . ^ s �- OP OUTLET PROTECTION PER VESCH 3.18
\ ♦ l - - - PRESERVED SLOPES B� SOIL STABILIZATION MATTING VESCH 3.36
S 2. •� ST UFFER
OPEN SPACE PRESERVATION
CIP 4s6 �� ♦ \ ��� �
\ VA VA
\ + \
LOCATION OF \
\\s
• y J/ \
FUELING AREA / ♦
LOCATION OF LOCATION DUTYPP i ORT-A-PO
\ \
- -- MPSTER a PTTY
- - ---- -- / 2 \ \ \ ��♦+ \ S \ +
/ \ FLOW DIRECTION ARROW (TYP.
SOIL .A� \ S ET +
TYPE \ �� / / \\ \ EXISTINGPRESERVED\
- 21B `• i \ \♦ SIEEPSLOPES (TYP)
DC
�♦ \\\\�
--SO
ilEXISTI%GTREELINE{TYP. S �`�, :\ �` \ \ ♦ f \\ \ \
l 1 TC�L� \ 4 ♦ \ \\
1
�/ ♦ / I z-, C PHAS 1 \ \ 1♦ 1 \ 1 \
iDD 12 x70MIN. SBis \
1 Area=5.31 ac.
■ ■■■r Tc=i .2MIN.
75' STREAM BUFFER
ONTD PROPOSED IVERSION
�CONTRARACTORSHALLENSURE' +
POSITIVE SLOPEMAINTAINED,
18"BERM PROVIDED. BE
SHALL BE STDr)
FIRST STEP IN DISTURBANCE \ \ \
� \ \ � SOIL
♦ / / / TYPE
PROPOSED BERM. . /
TP 440 \ CONTRACTOR SHALL ENSURE \ /
♦ \ POSITIVE SLOPE MAINTAINED, \ / 39
D
i8" BERM PROVIDED. BERM
' ♦ SHALL BE STABILIZED AS A
SF ♦ \ FIRSTSTEP INDISTURBANCE
/ / \
i ♦ \ OPOSED OT STD. TYY E
+ + 1 ♦ IRIP AP ED HANNELw/
QP OTEyC;TILE FILTER FABRIC / \
\ I \ ♦� �, UN RLAYMENT. CHANNEL ND TO STREAM / 1 • ,.....
i EX
SF RIP
\ ALE /
z \ NOSCALE �A ♦ e' y
\` PROPOSED / / �. \ \\ / \ ♦.
STOCKPILE
1 AREA SHALL BE
SURROUNDED I ♦ �\ ce/ �—
�� BY�ILTFENCED:CD7�
47(1
� I
\ . \ II II \ 1 \``S \ ♦ TS \ � SOIL LINE (TYP.).
+
+. I ♦ '�EXISTING MANAGED
STEEP SLOPES (TYPJPROPOSED DIVERSION BERM.
♦ \ / / �� CONTRACTOR SHALL ENSURE
-. \ _ \\ POSITIVE SLOPE MAINTAINED,,
E \ ♦ \ % / / I z8" BERM PROVIDED. BERM
PHASI
\\
3 \ / SHALL BE STABILIZED AS A \ y \ \ ST1 \ \ \�-� — \ `� / / / �� FIRSTSTEPINDISTURBANCE
Area=o.77 ac.
Tc=5 MIN. \\ SF \\\� ♦ / TS
IN
0
iE DIVIDE
�\ \
\� \ VDOT EC-i CL. I RIPRAP Q P
\ �W2=4.5'; W2=23.5'; L=iz'; D=z 5'
♦�'
DC
� TS - `
— _ /
1 — ' PS _ - T
3COTT R. COLLINS' ?
Lic. No. 035791
..
w
Ln
a
x
d
III
Fn
z
Lu
UU
C0
.,
W
F
o
F
00
,
W
I -
0
k
z
z
Z
,,
a
Z
Ln
z
o
0
0
J
w
U
x
Z
OQ
<x
0Z�
?
u
0
O
w
4
K
z
o
j
LLI
1,
w
a
>
U
o
w
W
W
w
U)
CC
w
w
00
r,
M
M
00
m
co
n
cy)
N
0
WCy)
N
N
W
F-
U)
JLU
J<
0 0
0
N
u
O
of
O z
Q a
OO
J �
z o
D (mil
o
p� w
O
LL a
z 0-6
z
a— 0
0
ww
C
G Lu
C
Lu
a
Ln
w
J
F
U ~
L w
O w
K x
a Ln
JOB NO.
122071
SCALE
III =30'
SHEET NO.
4
\ 1 CONCRETE WASH ■ ■ ■ ■ ■ ■ ■ LEGEND LEGEND
TAREA .._4
WASH RACK SF PROPERTY LINE (TYP.
� LIMITS OF LAND DISTURBANCE SAF SAFETY FENCE PER VESCH 3.01
— x • T P — DIVERSION DIKE CE CONSTRUCTION ENTRANCE PER VESCH 3.02
BOUNDARY LINE
SF SILT FENCE PER VESCH 3.05
SILT FENCE
I DIRECTION OF FLOW
IP INLET PROTECTION PER VESCH 3.07
653.75 PROPOSED CONTOUR
�
C
TP 1 ___ ■ ■ ■ ■ ■ ■ DRAINAGE DIVIDE DD DIVERSION DIKE PER VESCH 3.09 � SSTEEP
EXISTING PRESERVED— SOILS LINE SB SEDIMENT BASIN PER VESCH 3.14
_
DID SLOPES (TYP.) — / x STEEP
MANAGED SLOPES O
12 X70 IN. - ''' _ OP OUTLET PROTECTION PER VESCH3.18
�` PRESERVED SLOP
_ _� I/ / ♦. � � - � \ � %� - \ g/ SOIL STABILIZATION MATTING VESCH 3.36
/ �Sf ■■�■ \ \ AM BUFFER
■ \ \ OPEN SPACE PRESERVATION
NOTE: TOTAL LIMITS OF DISTURBANCE PROPOSED WITH
LOCATION OF \ _\ / \ ♦� \\�\\ THIS PLAN = Tog ACRES.
\ \
\ FUELING AREA
VDOT EC-2 CLASS Ai RIPRAP LOCATION OF \
W/FILTER FABRIC OUTLET OS - +• �— LOCATION DUMPSTEER / -A-POTTY
010 0 S3
3COTT R. COLLINS' ?
�l
Lic. No. 035791,E
5', \ �
W2=3xi.25' 3 75 � // \ \ \ / ♦ \ \ \ \\ m
W2=5'+2.25 6.z5' + DC \ \ \ \ ED
// V // v ♦♦� v\ \ Z a
+ \� \ \ / A \♦ �� Vi E
Lu
♦ Ile
\\
PROPOSED DIVERSION BERM.
CONTRACTORSHALL ENSURE / \ +
POSITIVE SLOPE MAINTAINED, I \
18" BERM PROVIDED. BERM ,
SHALL BE STABILIZED AS A I P \ \ \ \ \
FIRST STEP IN DISTURBANCECE\ x \
s
-- 12'x7o' MIN.
— —\j ,1 \\\\�
75' ST AM BUFFER \'
\ \_ \� REAM
\ ® DC \ Cw=o.65
s T ZTc=1o.8 MIN. \ \ / ♦ \� \
00 00
z
F
z I-
O In F-
Z
U Z
W
W
0 U U
0 z z
o 0 o
w U U
W W
s W a
>W
cc al
"0
00
"0
0"
M
00
m
t\O
x ♦ �ti♦ \ \ / \ vy� \ V rn_
V OT EW-i & DOT EC-i
x DD S CLASS 1RIPRAP + \ i� \ ♦ \ \\ M
W/FILTER FABRIC \\C6O
/ ■ o� ♦♦ OUTLET PROTECTION b \ GG: } \ x \ / / S \ \ \ \ \\ \ CY) O
♦ io 1.8 CFS
♦ Vio so.3 FPS \ �\
TP 5Go \♦A L=8';D 2.5' �P A/ %�/ /�� \ ♦♦ ® M
♦ Wi=3xi.25'=3.75' \ \ \
SF ♦ DRAINAGE DIVIDE (TYP.) V " I \� W
x 2 W2=8+1.25'=9.25 +
+ _ i% C) /O z
a i � OP o �\♦♦\ o_-�B. �Pf�AP LINED � \. \ / - /. � J
- 3 L 1 G) Q
waovoseo CONTRACTOR TO r \ - — _- ' 3' XTEND TEOSTRE ANNEL
sTocknLEAaEA I I INSTALL PORTIONS \ � + \ \ if \� ♦ P I \
\ W N
/ SHALL BB N L e\ kl \ TS I. _\� \ ,� \ Q
sueeounoeoev OF THE WALLw/ SF � RIPRAP 4 �A�� � \ LL J
_ siLrFeNCE I I THIS ESC PHASE ♦ SWAL \ \ \ 5 // i• ♦' \ \ \ > \ \ I\F . ,� I/ __, \♦:♦ / \ �- \\ \ \• / r \X + ` - �� � ♦ \ s OpP J
O
O
VDOTC-iCL.IRIPRAP 2.5' L
Wi=y.S'; W2=23.5'; L=ia'; D=
z
EXISTING i S G MANAGED
G J J
V 1 A STEEP SLOPES (TYP.) / �..��� V'. > C)
\ s I
o \ �+ ♦\ \ / / w 0
F� SF
PROPOSED DIVERSION BERM.
\ I V DC _ W I P i / / / CONTRACTOR SHALL ENSURE L1J
\ r S 2 I I -Ts ♦\ /' v �. - ,/_ - /. ,.. .POSITIVE SLOPE MAINTAINED, O
ST1 \. \ \ j \ j /
/ / 18" BERM PROVIDED. BERM J O i--I
\ ATE d=0.]] dC. \ TS \ \ / \ / / / //�%/ SHALL BE STABILIZED AS A \ � []
\/ �� I - / -/ \ FIRST STEP IN DISTURBANCE Q w
_
z /
Tc=S MIN. I � ''� ♦ � � � . + � � � % i \\ U dS
\ \ BEM \ ♦ /\ \ / / i� / /�2 \ Y m O
w
i •-� / \ y/� �� \
Lu
Ts- ul Lu F --- I
z' B/M W
3
w w
C)
o1
\ V —�� —♦- �\\���\��\\\�\\\\��\ -- —� / y ate-- � � � PS � / � — , i ��� � H z = \ T \ \ —�
L a
1 _
\ LIMITS OF DISTURBANCE (TYPJ. ■ ■ �- \ / / ---. A
TREE PROTECTION SHALL BE
PLACED ON LOD LINE IN FIELD \\ —x•-�- �� -` _ — /
\ \ SF \ \
N
\ ■
\ ■■
eta w w
\ 25'STREAMBUFFER d Ln
\ GRAPHIC SCALE \c ` _ JOB NO.
/ - \ 15 30 60 120 \ —J SAF / ' \ \ 122071
/ \ \ _\ SCALE?
1 inch FEET30 ) fL. \ \ \ \ \\ yj o �. / \ III = J0'
Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 1 Y Y Y Y r r r r r r r
1 I I 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 TH 0
WASH RACK �� PROPERTY LINE (TYP.) CONTRACTOR SHALL MAINTAIN THE ESC PHASE II DOWNHILL DIVERSION AS LONG AS POSSIBLE. THIS WILL ENSURE DISTURBED AREAS ARE DIRECTED F�
I .�� ■— INTO SEDIMENTTRAP #1 DURING THE INITIAL PHASE III GRADING OPERATIONS. 1�
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
■ / 1 1 APPROVED PROVIDER OR SHALL ORIGINATE FROM A BORROW SITE THAT IS COVERED UNDER A SEPARATE VSMP PERMIT. SCOTT \ R. LINSZ ♦ ■
3. DURING THIS ESC PHASE III, THE CONTRACTOR CAN BEGIN EXPANDING THE GRADING AND FILLING OPERATIONS. WHILE THE GRADING IS UNDERWAY
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
PORTIONS OF THE PHASE II STORM SEWER SYSTEM INSTALLED WILL BE BLOCKED DURING ESC PHASE III TO ENSURE RUNOFF IS DIRECTED INTO
\ 1 SEDIMENTTRAP #1. THIS WILL CONTINUE TO ENSURE DISTURBED AREAS ARE TREATED IN SEDIMENT TRAP #1. ASA BACKUP PLAN, AT ANY POINT dp
8/25/21
C I (APPROVED . TP I I —� _ DURING CONSTRUCTION THE ESC INSPECTOR RESERVES THE RIGHTTO REQUIRE THE ACTIVATION OF THE PHASE II YARD DRAINS AND STORM SEWER. ftS O1
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 SIGNAL E�
4w \ \ CONTRACTOR SHALL CLEAN THE STORM SEWER AND CONFIRM ITS STRUCTURAL INTEGRITY WAS MAINTAINED. ALL INLET PROTECTION SHALL BE
.
\ \ \ 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. WITH THE INSTALLATION OF THE SITE UTILITIES & DRAINAGE STRUCTURES ALREADY UNDERWAY, THE CONTRACTOR SHALL CONTINUE THESE
IJ . \ ■ ■ / I \ \ \ \ l \\ \ \\ Q 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
a \ \ \ \ \ \ AT ROUGH GRADE, THE CONTRACTOR SHALL INSTALL THE CURB, TERMINATING IT AT SEDIMENT TRAP #1's 2:1 TIE-IN GRADES AS SHOWN. INSTALLING
THE CURB IN THIS MANNER WILL ALLOW IT TO FUNCTION ASA DIVERSION, DIRECTING UPLAND RUNOFF INTO SEDIMENT TRAP #1. ANY ESC
x \ \ 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.
�. �� •, A / 5. ONCE THE MAJORITY OF THE SITE IS CLEARED AND ROUGH GRADED, MINUS THE SOUTHERN PORTION OF THE ALLEY, THE CONTRACTOR SHALL
LOCATION OF \ TEMPORARILY STABILIZE THE UPLAND AREAS ON THE SITE WITH TEMPORARY SEEDING AND STRAW MATTING. THE CONTRACTOR CAN ALSO BEGIN TO
FUELING AREA�� \
APPROVED VDOT EC-i CLASS Ai RIPRAP LOCATION OF V \\� CONSTRUCT THE RESIDENTIAL BUILDINGS ONCE THE LOTS ARE AT ROUGH GRADE.
7. UPON PERMISSION AND AUTHORIZATION FROM THE ESC INSPECTOR, THE CONTRACTOR MAY BEGIN THE CONVERSION OF TEMPORARY SEDIMENT
W/FILTER FABRIC OUTLET PROTECTION LOCATION OF PORT -A -POTTY / \ \ TRAP #1 TO A PERMANENT DETENTION BASIN. THE CONTRACTOR SHALL INSTALLTHE RETAINING WALL ADJACENT TO THE SEDIMENT TRAP &
030=0.53 CFS UMPSTER \\ \ CONCURRENTLY REGRADE THE TRAP TO THE FINAL CONTOURS SHOWN ON THE SWM FACILITY'B' DETAIL DEPICTED ON SHEET 10 & THIS SHEET. WHILE
V70-2.61 FP - A THE TRAP IS BEING REGRADED THE CONTRACTOR SHALL INSTALL THE PERMANENT RISER, BARREL &SPILLWAY TO MINIMIZE FUTURE DISTURBANCES.
L 5; D=1.Q' Z V A \ THE RISER AND ITS LOW -FLOW ORIFICE SHALL BE TEMPORARILY PLUGGED WATERTIGHT AT THIS TIME AND THE REGRADED FACILITY SHALL FUNCTION
W1=3X125'-3J5' \ v \ ASA SEDIMENT TRAPPING DEVICE UNTIL ALL UPLAND AREAS ARE STABILIZED.
W2=5'+1.25=6.25' D / \ \ . \ \\ c \ 8. WHILETHE RETAINING WALL ADJACENT TO SEDIMENT TRAP #1 IS BEING INSTALLED,THE CONTRACTORSHALL BACKFILLTHEAREA BEHINDTHE WALL
ca
Ln
AND SHALL ROUGH GRADE THE FINAL PORTION OF THE ALLEY. ONCE THE LAST OF THE ALLEY HAS ACHIEVED ROUGH GRADES, THE CONTRACTOR CAN
FINISH THE INSTALLATION OF IT, ITS CURB AND THE REMAINING DRIVEWAYS. WITH THE CONSTRUCTION OF THE ALLEY, THE CONTRACTOR MAY ELECT
TO DELAY THE INSTALLATION OF THE FINAL TOP COAT OF ASPHALT UNTIL THE CONSTRUCTION OF THE LOTS HAS BEEN COMPLETED. THIS DELAY WILL z
REDUCE THE RISK OF DAMAGE TO THE ASPHALT BY CONSTRUCTION TRAFFIC.
9. THE CONTRACTOR SHALL CONTINUE TO CONTROL AND 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
\ 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 DORMANT
\ \ (UNDISTURBED) FOR LONGER THAN 14 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE TO BE LEFT DORMANT FOR MORE
LOT z9 S THAN 1 YEAR.
v 10.ONCE THE TRAP IS FULLY CONVERTED AND THE SITE's FINAL GRADES ARE PERMANENTLY STABILIZED, INCLUSIVE OF SWM FACILITY'B', THE
LOT 30 \, CONTRACTOR CAN ACTIVATE THE RISER & LOW -FLOW ORIFICE IN SWM FACILITY W AND REMOVE ANY REMAINING ESC MEASURES. THIS IS INCLUSIVE
LOT 3-1y� OF PERIMETER SILT FENCE, TREE PROTECTION, ORANGE SAFETY FENCE AND INLET PROTECTION. NO ITEM SHALL BE REMOVED, THROUGHOUTALL
Ir \ \ PHASES OF CONSTRUCTION, UNLESS THE UPSTREAM AREAS ARE STABILIZED AND THE ESC INSPECTOR GIVES PERMISSION. CONTRACTOR SHALL
STABILIZE ALL AREAS OF THE SITE IN ACCORDANCE WITH EROSION AND SEDIMENT CONTROL REQUIREMENTS.
\
IP t \ 11. THROUGHOUT ALL PHASES OF CONSTRUCTION, THE CONTRACTOR SHALL MAINTAIN ALL EROSION CONTROL MEASURES AS SPECIFIED IN THE VIRGINIA
EROSION AND
SEDIMENT
EROSION CONTROL
AND HANDBOOK,
NT REMOVINGCONTROL
ONLY BOOK. WHEN APPROVED BY THE LOCAL PROGRAM ADMINISTRATOR IN ACCORDANCE
WITH THE 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 ^�
EXISTING PRESERVED
12'x7o' M N s \ y N
R STEEP SLOPES (TYP.) 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. 00
IP ONCE THE BULK OFTHE ALLEY IS AT ROUGH GRADE, THE CONTRACTOR 75' STREAM BUFFER
\ SHALL INSTALL THE PROPOSED STORM SEWER & CURB. THE CURB ° °/ \
\ INSTALLATION SHALL TERMINATE AT SEDIMENT TRAP #ts 2:1 TIE-IN GRADES. \ /
APPROVED-
� INSTALLING THE CURB IN THIS MANNER WILL ALLOW IT TO FUNCTION ASA
. DIVERSION, DIRECTING UPLAND RUNOFF INTO THE TRAP. ALSO, THE 5\ PHASE III
PROPOSED PHASE II DROP INLETAND YARD INLETS SHALL REMAIN BLOCKED / Area=5.o8 ac.
I ` DURING CO STRUCTIONTO ENSURE SEDIMENTIS DIRECTED INTOTRAP#1. r. Cw-o.65 \ b- \ \ �\\ 0)
APPROVED VDOT EW-1 c=1o. MIN. \ — �V Lu �
A� — tk -�\ c )
/ / � \
\ ��\ CLASSIRIPRAP M
\ \ / / • \ \�\ \ \ \ \\,
/ \ \ W/FILTER FABRIC \
OUTLET PROTECTION \\ N r}
Qio-1.8 CFS
up40 �V1010.3FPS
D z.5 Wl= Wl 3x1.z5' g.75' \ � / � // / / �DRAINAGEDIVIDE N
SF y Wz 8+1.25-9.25'\ / \ \
rs \ \ \
o
N W z
3
1
/ N
I
/
P
J \
PHASE II I
D ° fl.
v z
\ Area=o.9� ac. \ \ \ �. \ \ e \ w
w=o. 1 I Li�
\\ I I C=5 M N. I ' ■ `:�\ •. <EXISTING MANAGED \ IF, \ \ / APPROVED VDOT EC-i CL. I RIPRAP \ \ + J ) - - L=12'; D=2.
STEEP SLOPES (TYP. , - W2-1 �5; - - 5' � � \
Wl ,
�/�\\ > U
r / 4�5 3
\ IOT3 \I \ I APPPRIVE�RS�BERM. \ \ \ Q H
I I A v\ W
BM i u
_ A CONTRACTOR SHALL ENSURE
I / IP \
/ : �i , I L9 � � �� � � � � � .POSITIVE SLOPE MAINTAINED, \ ` \ � W
S
�� SHALL
0 BERM PROVIDED. BERM - A�
\ � w SHALL BE STABILIZED AS A � � F--I
�FIRST STEP IN DISTURBANCE \ TS J V
° e
W
- \
v \ Ps _ - �■ \\ � \� \ — — // � � vv �� v� F_ cC o
Lu
Lu
ul
U) >
DEPICTION OF SEDIMENT TRAP CONVERSION TO SWMFACILITY'B' �-I
1"=30') O F--I
Lu
\ AETER THE SITE Ste@ O G GRAND OT�E ZJN 5 \ \ w
Of < Q
Q\ THIS�PLA E O T A TOR S L T L HE RETAININ / \
QT 34 � WALL ADJACENT O EEDIMENT TR PCQNC�IRRENTLY R�6,G
"3 THE TRAP TO THE FINALC NTOURS Sii� O T SWM FACILIITY'�� —A� / S � ~ _ ' DETAIL DEPICTED ON SHEET to&THIS§HE LlNHILE THE TR P�SB IN6\�
O
\ BARREL &SPILLWAY TO MINIMIZE FUTURE DISTURBANCES. TH RISER \ \ ��- / _ `� i _ —��� J
rp SHALL BE TEMPORARILY PLUGGED WATERTIGHT AT THIS TIME AND THE \ .� / -- // ► ,Ix \\\ \ \ w
. REGRADED FACILITY SHALL FUNCTION ASA SEDIMENT TRAPPING
'•: 1\ \ +/ DEVICE UNTIL ALL UPLAND AREAS ARE STABILIZED.
i
\' \ I ♦♦ WITH TH STALLATION OF THE RETAINING WALL
i+ ADJ NTTO SEDIMENT TRAP#1, THE CONTRACTOR
\ • ,i/ ALLBACK=ILL THE AREA BEHIND THE WALL
♦ SF ALLOWING THE ALLEYTO ACHIEVE ROUGH GRADES. APPROVED LIMITS OF DISTURBANCE ---Bl
. ♦�♦ ONCE TH E LAST OF THE ALLEY HAS ACH IEVED ROUG H (TYP.) TREE PROTECTION SHALL BE � \ \ * \ .\4 — — /-� \\\ V- 1 GRADES, THE CONTRACTOR CAN FINISH THE PLACED ON LOD LINE IN FIELD.' — _ - - • \\ \
INSTALLATION OF IT, ITS CURB AND THE REMAINI \ - - DD + �, • _ - \ �11 I I `~
a � � VAA
DRIVEWAYS, AS DEPICTED ON THIS SHEET. I -
\ A
o w
Z/ \� 25' STREAM BUFFER
\ GRAPHIC SCALE
\ 30 15 30 60 120 SAF : /\` 152118
_ � \ \ SCALE
SEDIMENT BASIN #1
SCALE: 1"=20'
P D - LA 1
---
ET - TE E(3 ILE -
SEDIMENT TRAP #1
SCALE: 1"=20'
SEDIMENTT RAP
EXISTING MANAGED
STEEP SLOPES (TYP.)
IPROPOSED \ \
BAFFLE \ 9'WIDEVDOT TYPE I RIPRAP LINED
IOUTLET PROTECTION CHANNEL IN
ACCORDANCE WITH VESCH SPEC 3 x9
� � \ CHANNEL DEEP
SLOPS. SEE CALCULATIONS PACKET
FOR ADDITIONAL INFORMATION.
Sediment Trap 1 design \\\\\\
drainage area (acres) (<3) 0.96 1-1 VAR"U I\\
trap volumes:
OF STONE WEIR
W.CREST `/PAiABLE•
GFOUND
elevation (ft) area (sf)
volume(cy)
E".
431.00 53.0
0.0
y a
432.00 156.0
3.7
DRY STORAGE N A H E
434.00 524.0
27.6
436.001 1013.0
83.5
437.00 1295.0
126.1
WET STORAGE
438.00 1603.0
179.7
FILTER CLOTH GROUND
cxouxG
ELEV
\
wet storage:
wet storage required (cy) (67*DA)
_
64.3
'SEE PLATE 3.13-1 CO E AGGREWTE" CI -ASS I RI ftP
bottom of stone weir (ft)
435.3
wet storage provided at this elevation (cy)
64.7
slope of wet storage sides
2:1
Sediment Basin #1 Design
MIN. 1` WI SPILL WAY
2'WITHOUT
CREST or EMERGENCY
SPRLWAY
drainage area (acres)
5.31
basin volumes: (using 2' contour intervals)
DESIGN XIWATER
(as-YR. WOW ELEV.)
elevation (ft) contour area (so
volume (cy)
03.
402.00
610.0
0
-
MIN 10
404.00
1617.0
79.5
RISER CREST
406.00
2749.0
239.4
' DRY ' STORAGE
DEWATERING
DEVICE
408.00
3998.0
487.8
wE STORAGE
410.00
5349.0
832.8
412.00
6800.0
1281.7
MINE T
SEdMSTOWECLEANOiff
(- REDUCED
I
T� C.Y./ ACRE)
wet storage:
wet storage required (cy) (67*DA)
355.8
design high water (fit)
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:
12k112'
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 (it)
7.67
C (use 0.45 for bare earth)
0.65
slope of upstream face (Z:1)
2:1
to (min)
10.8
slope of barrel (Sb)
1.33%
1 Tyr 4.0
Q Tyr
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
4.4'x4.4'
principle spillway:
available head (ft)
1.00
emergency spillway:
YES
diameter riser (in)
48
required capacity (Q25-Qp) (cfs)
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 (It)
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'
CONCRETE WASH
OUT AREA
0
�S ✓V
Sediment TraP2 design
drainage area (acres) (<3) 0.1
trap volumes:
o elevation (ft) area (sf) volume(cy)
466.00 327.0 0.0
467.00 519.0 15.5
468.00 736.0 38.7
r
x=
x
\x-x-
�- x
I
I
I
,` W1RYB1£
WEIR WMARIE`
CREST OF STONEGROUND
\
LEV ElEV
DRY STORAGE - N
YMwBI£
WET G
STORAGE
STORAGE
A, MAIL
FILTER CLOTH
oMGINAL
GROUNC
ELIN
wet storage:
X , wet storage required (cy) (67*DA) 6.7 'SIDE """"'13-1 caeREE AO[iiEWIE" CIASS I RPRAP
bottom of stone weir (ft) 466.5
wet storage provided at this elevation) 7.8
slope of wet storage sides 21
weir length (ft) (6xDA)
5.8
weir length (ft) (6xDA)
0.6
dry storage:
bottom of trap elevation (4)
431
dry storage:
bottom of trap elevation (ft)
466
dry storage required (cy) (67*DA) 64.3
bottom trap dimensions:
5'x18'
dry storage required (cy) (67*DA)
6.7
bottom trap dimensions:
9'X40'
crest of stone weir 437.0
top of dam elevation (ft)
438
crest of stone weir
467.0
top of dam elevation (ft)
468
dry storage provided at this elevation (cy) 64.7
top width of dam (ft)
2
dry storage provided at this elevation I
7.7
top width of dam (ft)
4
slope of dry storage sides 2:1
top trap dimensions
32'X466'
slope of dry storage sides
2:1
top trap dimensions
17'x48'
OF
)TTY
3COTT R. COLL NS' ?
Lic. No. 035791 n
00 OD
v LO
Z w w
Z I-
Orn U)
U Z Z
1 w
w
0 0 o
Z
� Z
O =) O
w U U
4 K
Luw w
[L EL
i °C Lu
> W
of
n
GO
m
GO
0)
M
M
I
GOO\,
coM
n
"•I
L\O
0
ti
M
C'M
O
O�
O
N
J
�
w
N
Cy)
O
WIN
IN
N
Q
J
W
O
F --- I
F-
LLJ
z
LU
�
_
::D
0
i
Q
Ce
L
F-
oC
Z
o
LO
0
O
Q
z
�
zLU
r
�
Q
Y
LU
t)
Lu
6
Ulv)
o
W
Z
w
F
z
Lu
`)
w
JLU
a
J
<
C�
G
C)
' ^
IN
w,
w
J
F
U
Lu
w
C)
d
w
En
JOB NO.
122071
SCALE
111 = 20'
SHEET NO.
6
i
PRE -DEVELOPMENT SCENARIO (S&L 0 I1"=30')
MANAGED SLOPES
PRESERVED SLOPES ,TH ofi
STREAM BUFFER 0
EXISTING TREE LINE (TYP.) Total = 17,860 sf SCOTT R. COLLINSZ
D.A.'A' Pre -Development Pervious Areas (Water Quantity) —
Existing Woods 86,500 sf U Lic. No. 035791
Existing Grass 70,334 sf
V ,
� SSIONAL EGOS
\ 1 \ D.A.'B'Pre-Development Impervious Areas (Water Quantity)
Existing Structures 0 sf
Existing Drive & Walkways 0 sf
Total = 0 sf
D.A.'B'Pre-Development Pervious Areas (Water Quantity) Z
Existing Woods 23,830 sf U)
1 ( \ \ \ r Existing Grass 21,908 sf o 00
00
1 ��Tc0.22 hrs. \ / I \ \ \ \ \ \\ " \ \ a D
OF OLF w/ A ELEV.=3.5' (Tc=0.1 hrs.) &,, I I I I \ \ \ \ \ \ �� �� \\ \ \ \ a z0
Lu W
OF C\w/ A ELEV.-63' (Tc-Q 04 hrs.) N o
Ln
�Zoog
6 o WLu
a o
LU
700
\ / �W 0000
M r`
/
L9
/ \ �� \ I, \
♦� I I I / \ \ \ / _� \ \ \
/ O
/ ♦ I I II \ \ \ \\\\� � J
Lij
I \ \ \ \ v\�/v>
a CDv�ueX LU
z
V / /
AyCN
XA\ \� > w
>
EXISTING PRIES \ V / / / / i \ I �� I�\ \ \ LU LU
TEEPSCOP (YP� \ / \ �1 \ \� W
J
�
�\ \ \ \ v v / / / / / o A VA\ VA \A� U / I
V J✓ \ l9 O 0 J
/ — — / \\ \
�1.os aC'. �i I \ ij/ / �sd I A \ \ \A
t
\ ( I CN'=58� z
// \ �\ z
o I Tc=o so I rs.II % / VA v J `v �i / / ��� \ v ZLU
\V ��v� I Q w
LU
AT N OF � PROPOSED � � � A \ Q
\LO� o
SWFACIL'ITY'B'
07 Z
„/ Ul W w
LOC�TION OF PROPOSE[ SW�vI/FAILI�Y /� \\ 1 \ LU G
�43� v / /° / / W Q Q
1-�is FING
ngArvA z/ (� / \ I
S'1E`;P\SPES\(TY \\ \ i \ U..� IDC
LU
go
go CN
\ PE AVE END RMINED LESS �� — — _ /
AN 25% D NEW TOPOGRAPHIC _ \ / i
�✓ � % \
EXHIBIT & URVEY PROVIDED BY \ \
ROUDJ,BUSH, GALE\�\ \ \ o w
Tc= 0.10 Ihrs. in. ND ASSO JY TES AS PERMITTED — — — v � — — — ` �
100' OF OLF w/ 4 ELE .=16' c= .10 ) \ U ER SECTI N 30.7.4(b)h (TYPICAL) 00
�06
d x
42' OF CF w 4 ELEV.-10 cGO. 1 h s \ \ _- , _ _ \ No
/ ( \ GRAPHIC SCALE_�
/\ 122071
15 30 60 120 WA ,� Ft \ SCALE
APPROVED STREAM �-tea _ _ ■ / 1 \ \
_ / \ � BUFFER (TYP.) � -� == \ - - — — _ _ _ — 1"=30'
—
IN FEET ) �� \\ --- / / / / \ \ �\ SHEET NO.
/ 1 inch = 30 ft. \ / \
D.A.'A' Pre -Development Impervious Areas (Water Quantity)
Existing Structures 5,328 sf
Existing Drive & Walkways 12,532 sf
POST -DEVELOPMENT SCENARIO & BEST MANAGEMENT PRACTICE PRESERVATION EASEMENT
APPROVED Watershed Summary for DA'A'
(Per Approved Amendment #3 to WPO 201600058)
10-year Flow,
Area,
1-year Flow,
2-year Flow,
CN
ac.
cfs
cfs
cfs
Pre -Development DA'A'
62 4.17
2.41
2.88
7.70
Post -Development DA'A'
80 4.17
0.66
1.12
7.17
D.A. 'A' Pre -Development Impervious Areas (Water Quantity)
ExistingStructures 5,328 sf
Existing Drive & Walkways 12,532 sf
Total = 17,860 sf
D.A. 'A' Post -Development Impervious Areas (Water Quantity)
Roadway 29,600 sf
Sidewalks 19,300 sf
Buildings 46,650 sf
95,550 sf
AMENDED Watershed Summary for DA'B'
(*Per Approved Amendment #2 to WPO 201600058)
NOTE: This Amendment #4 releases post -development flows below the previously approved peak post -development flows.
Area,
1-year Flow,
2-year Flow,
10-year Flow,
CN
ac.
cfs
cfs
cfs
*APPROVED Pre -Development DA'B'
58
1.05
0.36
0.67
2.34
*APPROVED Post -Development DA'B'
85
1.05
0.48
0.55
2.24
AMENDED Post -Development DA'B'
1 73
1.05
0.32
0.36
1.95
*APPROVED D.A. 'B' Pre -Development Impervious Areas (Water Quart
Existing Structures 0 sf
Existing Drive & Walkways 0 sf
Total = 0 sf
AMENDED D.A. 'B' Post -Development Impervious Areas (Water Quanti
Roadway 6,474 sf
Sidewalks & Driveways 1,217 sf
Buildings 7,230 sf
14,921 sf
APPROVED Impervious Areas for Water Quality l
( I otal unslte Impervious Areas)
Phase I Roadway
29,600 sf
Phase 11 Roadway
9,534 sf
Phase I Sidewalks & Driveways
21,188 sf
Phase 11 Sidewalks & Driveways
5,964 sf
Phase I Buildings
63,700 sf
Phase II Buildings
10,995 sf
Total = 140,981 sl
AMENDED Impervious Areas for Water Quality
(I otal unslte Impervious Areas)
Phase I Roadway
29,600 sf
Phase II Roadway
6,974 sf
Phase I Sidewalks & Driveways
21,188 sf
Phase II Sidewalks & Driveways
1,267 sf
Phase I Buildings
63,700 sf
Phase II Buildings
7,955 sf
Total= 130,684 s1
NOTE: This Amendment #4 proposes less impervious areas
than the previously approved plans. Therefore the prior
nutrient credit purchase and SWM Preservation Easements
remain sufficient to meet the minimum water quality
requirements.
ity)
ty)
I
AMENDED (UNCHANGED) Tc= 0.10 hrs,-�
50' OF OLF w/ A ELEV.=4' (Tc=0.07 hrs.)
& 275' OF CF w/ A ELEV.=22' (Tc= 0.01 hrs.)
(MIN. SCS Tc=0.10 hrs.)
x
vLEA F�1'=�34'�I Qf APPROVED Tc= 0.18 hrs. MANAGED SLOPES
t1 • ...■■■■1111■■,0411 100' OF OLF w/ A ELEV.-3.5' (Tc-0.18 hrs.) PRESERVED SLOPESTH OFF
•�� 1-:7 _ _ & 87' OF CF w/ A ELEV.=5' (Tc > 0.01 hrs.) l
STREAM BUFFER
��� \�♦� ) I 4175' OF CF @ 14 ft/s (Tc > 0.01 hrs.) �0,
/ ♦♦� V ♦1�( \ \ SCOTT R. LLINSZ_
I ' / ♦♦ i - - I I APPROVED U Lie. No. 035791,E
13 I I / ♦♦ � - -�- - � ♦♦ ) I I � (
LIMITS OFTREE '0,,o� 8/25/21�4
\CLEARING (TYP.)- - �SSroxAL 19
�X��) vv-� �v ♦♦1 I I I I \ A \ \ \ \ r A\\
VARICK STREET, MARIN COURT, AND THE
�\ ��� ♦♦ ♦ / ) �� I V A\ \ \ \ \ \ VAS 1\\ \ \ \ A \ SURROUNDING LOTS ARE NOT PART OF
�\� \ \ ��` ♦♦ / \ \ \ \ \ \'\ \ \ \ THIS SET OF PLANS. THE PROPOSED SWM
FACILITIES & BEST MANAGEMENT
V / ` A - ♦ \ V A V V A V \ V A \ \ \V�V PRACTICES ARE PROPOSED WITH THIS
SET OF PLANS & PROVIDE TREATMENT
FOR THE ROADWAYS AND SURROUNDING
wy �- - i � `� � �' ♦ A V V A \ \ \\ I �° A \ \� LOTS.
\ \% �������♦\\�A\\\ \V A\V A\VA\\\\�\\\\s \\ \\\
��-Co
+ + \ TAP M
%
\ ROVED DA' \ \\
♦ � \x vvA °17ac. svv )<V♦♦ V A 1 I llv( \vA`VVAAA
Uj
♦♦♦ ♦♦ c=o.18 h r . >1 \ \ \ ♦♦� V A A vv v V A \
fO\REST & OPEN SPACE
y v / - \ � / \ �♦ A 1 A V 1 V A A \ �� r" MEN I\(DB 04967, PG
_ \ �� \ \ _ X L� X \ \ \ \♦j\ 1 \\ \ \ \ \ \ I 1 \ \ 1
/ v v _♦ �1v \ +\ I;� / \ \\ i�1j1A 1 V A\ \ 1 I A I I3hI�E N T �IN\N ME -PRACTICE &
IBITS FUTURE
< \b 00
C
LOI MENT&
)i L 1♦ \ / %4 - - - -- _ J/ 1 \ \ \\ \ \\ \ \\\ \ '\ \ (I V � D�\S RBN �CES
I ♦ !♦ v v_-- / I A \♦♦ V \ \ VIIII A�\ v v
I
\ \
i
i
1
1r05 .I
\ I
CN;= $�
Fh r
I
1
V
O
I
10\
APPROVED STORMWATER MANAGEMENT NARRATIVE: 3
\ \ \
THE PROPOSED PLAN PROVIDES STORMWATER TREATMENT FOR THE CONSTRUCTION OF
\\
THE DUNLORA LOTS (UNDER SEPARATE REVIEW). THIS VSMP PLAN ADHERES TO PART IIB
\
REQUIREMENTS FOR STORMWATER MANAGEMENT. THE SUBMITTAL PACKAGE DOCUMENTS
ASSOCIATED WITH THIS PLAN SHOW WATER QUALITY COMPLIANCE BEING MET THROUGH
THE BEST MANAGEMENT PRACTICE OF OPEN SPACE PRESERVATION, AND A
NUTRIENT CREDIT PURCHASE. THIS PLAN ALSO COMPLIES WITH PART IIB REQUIREMENTS BY
3
THE ATTENUATION OF FLOWS IN THE DETENTION BASIN. PLEASE SEETHE ATTACHED
STORMWATER MANAGEMENT CALCULATIONS PACKET FOR THE FULL DETAILS OF PLAN
COMPLIANCE.
\
1
\\ \
I
General Construction notes for Stormwater Management Plans
All dams fill to be dry density
\
i. and constructed within 95% of maximum and 2% of
optimum moisture content. All fill material to be approved by a geotechnical engineer. A \
\ \ \ \
geotechnical engineer is to be present during construction of dams. \
2. Pipe and nser)oints are to be watertight within stormwater Management facilities.'\
\ \ \ \\
3. For temporary sediment traps or basins which are to be converted to permanent
\ \ \n\
stormwater management facilities; conversion is not totake place until the site is
\
stabilized, and permission has been obtained from the County erosion control inspector. \
��♦� ���'F�, X °' v /� i V A \ \ V A \ \. 1 A \\\�\ Pit\\VEb"r \ \ - ♦ \ < \ + \ �F , / / / / / / \ s �j \ \ \ \ \ 1. STREAM BUFFER (TYP.)
> w \\\0\ L9 r-
\ ♦s > / / ♦ \
/ / �` \ \ \ \ \ ♦�\ / +\ - \ / / / / / - _ APPR V SHAPE >\\ \\ \ III 11 Q
�_ V A \ V - - / / RIPR NED CHANNEL l \
\ / / 1 ■ ♦♦ A A v \v v / / x + DI HTI RUNOFF I
w
TFACILI _)_- A J
L9
v
\ II
1 • \ ���- J + / SWM FACILITY EASEMENT / / / / ) ) V1i 11
1 \\ \�_ __ ♦�// / \ (DB04967,PG1 1 ) 33- 34 W
x - -
\ \ �� \\ \ \ \ \ \ \ \ \ \ ♦♦ \ \ / / / /J / I / /q2�ill lil W
Ul,�X15fiIHCi 1v1,4NX>l6Eb \ A v v v v � i � / / // � I :1,- � (�
- -
ILU
v APPROVED SLOPES HAVE BEEN
DETERMINED TO BE LESS THAN z % \ \ \ \ _ _ - - - - _ _ _ ♦ /
BASED ON NEW TOPOGRAPHIC EXH BIT & \ \ \\ \ > •♦ e • % � =1T_I-Il W
♦♦♦ SURVEY PROVIDED BY ROUDABUSH \\ \ / > 4'Z21 -
\ v - - J ♦ --
GALE AND ASSOCIATES AS PERMITTED 422-
\\ � � � _ - - \ ♦ / / / --��-_ - -,� _ J -` �1�1= � �
UNDER SECTION 30.7.4(b)h (TYPICAL) \ \\ - - _ _ _ - - - - -- - - - - _ \ \ / / /q�/ \ - \li (D
1gV�CD
�II-
CN
APPROVED STREAM �� - Wf■��- �■ ���■
BUFFER (TYP.) \ - 11=�1-u -
\_ GRAPHIC SCALE
30 \ T 30 60 120
SWM FOREST& OPEN SPACE
EASEMENT (DB 04967, PG 133-134)
\ ( IN FEET) COINCIDES WITH PROPERTY LINE-
/ 1 inch = 30 ft.
SWM
FACILITY TO TREAT \ \ \
WATER QUANTITY NOT QUALITY). \ \ \ \\
z w
j.. j
O
W
z w
W C)
2
Q
0-
V)
Q
W
O 2:
O W
(D
p� z
LU Q
O ED
LL �c
G
J O
z�
ZD
0
w
W
d �
JOB NO.
152118
SCALE
1"=30'
SHEET NO.
8
BASIN NOTES:
i. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS.
2. A CONCRETE FOUNDATION SHALL BE INSTALLED ON THE RISER AS SHOWN & MEETING THE MINIMUM SPECIFICATIONS SET FORTH IN THE VESCH SPEC. #3.14.
3. CONTRACTOR AND CONSTRUCTION SHALL ADHERE TO ALL OSHA REQUIREMENTS. ADDITIONALLY, SPECIAL ATTENTION SHALL BE GIVEN TO THE CONSTRUCTION
BASIN's CONVERSION TO A PERMANENT SWM FACILITY. CONTRACTOR SHALL ENSURE THE PERMANENT SWM FACILITY HAS A STABILIZED GROUNDCOVER, SUCH AS
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 (i) 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
\�_JLOTGR
APPRO
ED
ORIGIN
LEXISTI
GGRAD
DING
(PRE-C
NSTRUC
ION)
425
425
420
-7
420
ASBUILT
STIR. 2A
TOP OF VIALL=424.24
PPROV
D0 8
L. III RCP
10=421.6
(i5" HD
E)
STANDPI
E W/TRASHRACKS
SHALL
SERVE A
THE RISER
STRUCTURE.
ASBUILT
048" PIS
R RIM
D -
L
72'
Q z= 8.
7 CF
ELEV.=4
9-7O'-
415
V=4.8FP
415
RIP
s
AP
Q0 If.13
1
C
$
\
ASB
ILT34'
IDE GRASS
LINED
LE
Dlo 0
91 FT
EME
GENCY
PILLWA
CREST
ELEVA
ION=410.
'
ASBUILT
GRAD
NG WITH
- "
(8'T
POF CIA
0 ELEV.=412.Oo')
PROPOSED
RACE
CON
RACTOR
SHALLI
STALLA
410
M
DIFICATONS
PRO
SEDV-
HAPEDV
OTCL.I
4 10
RIPR
P-LINED
ITCH 2.'STONE
DE
TH) WIT
FILTER
ABRIC
X
UN
ERLAYM
NTTOC
NVEY
Q
RUN
FFTOT
ESWM
ACILITY
APPROVE
TEMPO
ARY ESC
^'
SIN TO BE
CONVERI
ED INTO
PERMAN
NT SWM
AGILITY
405
PROVIDI
G STOR
ATER
\
405
UAN
ITY TREAT
ENT
APPROVED
FLOOR
GRADE E
EV.=402
00'. CON
RACTOR
ENSUR-POSITIVE
SLOPE
0THE RI
ERATA
LTIMES.
TD
4O0
400
CONNE
TIONSH
LLBEFI
MLYEM
EDDED
"INTOA
R
INFORCE
18" THICK
CONCF
ETE FOU
4DATION
THAT IS
' x
ND IS BURIED
BELOW
THE
LIMITS OF
THE BAS
N GRADING.
ASBUILT
15"RCP
ARREL
S-1-40940
395
1
=400.90',
INV. OU
=I3 9 90')
395
APPROVED
DOT EC-1
CLASS Al
UTLET PR
TECTION
W/ GE
TEXTILE qILTER
FAB
IC UNDER
AYMENT.
392
ASBUILT
DIMENSI
S: L=16.5,
WS=7.4',
W2=18.9'
392
WW
L!1
rl
0 N
N v1
W
lrl
IN
CO
J J
MtIt
1717
d
It
.t
w u_
PROFILE SCALES
11+00 11+50 12+00 12+50 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 BEYOND THIS IS OPTIONALAND IS NOT REQUIRED.
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 GRADED TO PROVIDE POSITIVE DRAINAGE AT ALL TI MES TO THE RISER STRUCTURE.
3. WOODY VEGETATION SHALL NOT BE PLANTED OR ALLOWED TO GROW WITHIN 15 FEET OF THETOE OFTHE EMBANKMENT NC
WITHIN 25 FEET OF THE PRINCIPAL SPILLWAY STRUCTURE.
4. A VEGETATED BUFFER SHALL BE PROVIDED THAT EXTENDS AT LEAST 25 FEETOUTWARD FROM THE BASIN TOP OF DAM
ELEVATION. PERMANENT STRUCTURES (E.G., BUILDINGS, SHEDS, etc.) SHOULD NOT BE CONSTRUCTED WITHIN THE BUFFER AR
EXISTING TREES SHALL BE PRESERVED IN THE BUFFER AREA DURING CONSTRUCTION IF AT ALL POSSIBLE.
S. THE SOILS IN THE STORMWATER BUFFER AREAARE 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 FIVE TIMES DEEPER AND WIDER FOR CONTAINER -GROWN STOCK.
6. AVOID SPECIES THAT REQUIRE FULL SHADE, OR ARE PRONE TO WIND DAMAGE. EXTRA MULCHING AROUND THE BASE OF TREE
AND SHRUBS IS STRONGLY RECOMMENDED ASA MEANS OF CONSERVING MOISTURE AND SUPPRESSING WEEDS.
1. THE CONTRACTOR SHALL BE RESPONSIBLE FOR LAYOUT OF ALL WORK COVERED UNDER THESE PLANS.
2. LANDSCAPE CONTRACTOR SHALL REFER TO THE STANDARDIZED LANDSCAPE SPECIFICATIONS FOR THE STATE OF VIRGINIA FOR
ADDITIONAL INFORMATION. THE CONTRACTOR SHALL ABIDE BY ITS CONTENTS; HOWEVER ANY NOTES OR SPECIFICATIONS ON '
THE PLANS SHALL SUPERSEDE THOSE OUTLINED IN THE SPECIFICATIONS MANUAL (COPIES ARE AVAILABLE FOR A FEE FROM THE'
VIRGINIA CHAPTER OF THE AMERICAN SOCIETY OF LANDSCAPE ARCHITECTS, VIRGINIA NURSERYMEN'S ASSOCIATION, 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 MAY BE NECESSARY DUE TO SITE CONDITIONS (EX: FOOTBALL AND UTILITY CONFLICT). MAJOR
ADJUSTMENTS MUST BE APPROVED BY THE DESIGNER.
14. NO PLANTING SHALL OCCUR WHEN THE SOIL IS FROZEN.
15. PLANT MATERIAL SHALL BE PLACED IN EXISTING SOIL WITH EACH PLANTING PIT EXCAVATED TO A SIZE SUFFICIENT TO CONTAIN
THE ENTIRE ROOT BALL OR ROOT MASS, WITHOUT CRAMPING ROOT STOCK.
16. THE CONTRACTOR SHALL MAINTAIN A ONE (1) CALENDAR YEAR 90% CARE AND REPLACEMENT WARRANTY FOR ALL PLANTINGS.
THE PERIOD OF CARE AND REPLACEMENT SHALL BEGIN AFTER INSPECTION AND APPROVAL OF THE COMPLETE INSTALLATION OI
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 MATERIAL THAT HAS BEEN DAMAGED BY VANDALISM, FIRE, OR OTHEI
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, TH
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 COMPLETEL
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.
T T R T R 3. INSTALL E&S CONTROLS PRIOR O CONSTRUCTION OF HE BASIN INCLUDING TEMPORARY DE WA E ING DEVICES AND
STORMWATER DIVERSION PRACTICES. ALL AREAS SURROUNDING THE BASIN THAT ARE GRADED OR DENUDED DURING
CONSTRUCTION SHALL BE PLANTED WITH TURF GRASS, NATIVE PLANTINGS, OR OTHER APPROVED METHODS OF SOIL
STABILIZATION.
4. CONTRACTOR SHALL EXCAVATE THE CORE TRENCH AND INSTALL THE SPILLWAY PIPE DURING THE ESC PHASE.
S. CONTRACTOR SHALL ALSO INSTALL THE RISER, OUTFLOW STRUCTURE AND/OR THE BARREL(s) DURING THE ESC PHASE TO ENSUI
THE TOP INVERT OF THE OVERFLOW WEIR IS CONSTRUCTED LEVEL AT THE DESIGN ELEVATION.
6. THE CONTRACTOR SHALL THEN CONSTRUCTTHE IMPERVIOUS CLAY CORE EMBANKMENT AND ANY INTERNAL BERMS IN 8TO
12-INCH UFTS 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 APROI
PROTECTION.
10. THE CONTRACTOR SHALL NEXT STABILIZE EXPOSED SOILS BY HYDROSEEDING OR SEEDING OVER STRAW.
11. THE CONTRACTOR SHALLTHEN INSTALLTHE APPROPRIATE BASIN LANDSCAPING IN ACCORDANCE 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 SHRUBSPLANTED, 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 FLANKS 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 CONTRALTO
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) L
EMBANKMENT NOTES:
THE EMBANKMENT SHALL HAVE A COMPACTED CLAY CORE WITH A CUTOFF TRENCH & BE IN ACCORDANCE
WITH THE DETAILS SHOWN ON THIS SHEET. BERMS AND SPILLWAYS SHALL BE STABILIZED WITH EC-3 MATTING
& THE REMAINING DISTURBED SLOPES SHALL BE STABILIZED WITH EC-2 MATTING. ALL BERM FILL MATERIAL
SHALL CONSIST OF ML, CL, SC OR GC SOILS & BE FREE OF WOOD, ROOTS, ROCKS OR ANY OTHER NON
COMPACTING SOIL. COMPACTED FILLSHALL BE PROCTOR MAXIMUM DRY DENSITY ASTM D698 AND HAVE A
MINIMUM OF 9S%OF MAXIMUM DRY DENSITY AND 2%OF OPTIMUM MOISTURE CONTENT. ALL FILL
MATERIAL AND CONSTRUCTION SHALL BE APPROVED BYAN ONSITE GEOTECHNICAL ENGINEER PRESENT
DURING THE CONSTRUCTION OF THE EMBANKMENTS AND FILL AREAS,
e
1/2" zinc plated hook
attached with 3/8"
fasten-.
Isometric
". vft e� e
s
5/8- did hole
WE
1 /8" din. holes
III structural plastic with
2-1/8" holes end 1/4" plate
annu:nctured by 21ns-ac
9oluti6na Inc. or equal
on*" ■'itb optional plate
HDPE structural plastic with
2-1/8" holes and 114' plate
.�.'-L'Ction / manufactured by Plastic
Solutions Inc- or equal
0 L 0
O // C) X\ o
single BI I',ICViItio rl
aririce
DFRRIS CAGE
STEEL WEIR PLATE TO BE -
FASTENED OVER THE 1S"
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. RISEF
STRUCTURE IF THE STEPS
HAVE NOT PREVIOUSLY
BEEN INSTALLED. '
48" RISER
OUTLET PIPE
15" RCP ,
WEIR PLATE DETAIL
N.T.S.
PLASTIC
SOLUTIONS
INC.
P.O. Box A386
Winchester it 22604
877-877-5727
.n.pladic-wlwurnii.
SECTION A-9: TYPICAL GRAPEIIC aI. DETAII.5
sr- Homogeneous fill
�
T ``'Cut off tmvi l4-4e below miWe
Soil or rock L - - - - - - material - - J
TYPICAL HOMOGENEOUS
EMBANKMENT
Transition fill
ock or gravel
173
Pipe Cutlet Coarse fi�tPr .
Perforated Collector arou 50
FaundDtJon drain Blonket drain
FOUNDATION DRAIN BLANKET DRAIN
drain
Send, graiiI Dr Loci.
drain a4Uiet
Rod( or 9ravel
Rock be a drain
A n [ D
�Transilion filter Transition Filter
CHIMNEY DRAIN TOE DRAIN
Sou/1ce� SCSEngineenng Field kfauua!
Figure A -la. Homogeneous Embankments w/Seepage Controls
Storrnll
ROUND SERIES TRASH RACK
CONCRETE MANHOLE
STANDARD 601 NCH RACK SHOWN
DIMENSIONS IN INCHES
PLAN
SIDE VIEW
StormRaXTM Round Series for Concrete Manhole
Tart Nl I
MA
1 Mal
DIRC
MI
MI
RSlI
ITJI
1/36
28
M
30
RS36
213'i
UI
4D,1
1 36
tl
RSY1
27K
1 IT
1 S4
45
1 S7
RS•w 1
27%
1 UTA
I "M
I A)
1 A
Plaii Solutions, IIK. astoliDt
W b.4a94. Vlerlaaler. VA 12LW
L3a M.fAee VC. VAnaran!r, VA 12EE6i
"9T77 e7T.s7n phone PRO[CT.
1T4MX 72zuro,.,,
h.q,V7www.paa.sewam.mn
u...w IIIT
iunara c
CONCRETE STRUCTURE DIMlMBONa
INSIDE STRUCTURE DIMENSION
OUTRIDE STRUCTURE DIMENSION
AVAILABLE oFnI
CROSS BRACING FOR OVERHAND
HDPE ANTI -VORTEX RATE
DATE
DR4WNn
wpoer
DEAL
r-�
Lic. No. 035791,'D
>_ 05/31/21 J
J
to ce
z a
w Q
k O tr
O
U
U/ CO a Z
CO 2:z
In
ZW J � w
O w O
C.
H z w
U)
LL1 Co
� Co
'■■P
00 Ch N
M N \
'H N M
N W N
0
Z
ff
W
W
Z
L9
Z
Ul
Z
J
J
U
VJ
ti
M
M
N
M
I
N
C:)
N
N
LU
J
J
CO
LU
0
J
Q
U
I
LU
LU
LU
VJ
olf
LU
C:)
C]
N
M
LU
W
/Q
LL
V
0
0
/
LL
LU
I..L
0
z
ZD
0
J
H1
W
0
06
LLJ
0
z
W
W
z
LU
Of
G
0
JOB NO.
122071
SCALE
AS SHOWN
III=5' M
1"=5o'(H)
BASIN 'A'
SHE°T NO.
9
uc ,�
COUNTY OF ALBEMARLE
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:
1. Inspection Records and photographs for pipe trenches and bedding, including underdrains.
2. Video Pipe Inspection for any pipes which are not accessible or viewable.
3. Updated Location with geo-coordinates of all facilities.
4. Verified Drainage Area maps for the drainage area treated, and for drainage to the facilities.
5. Current physical and topographic survey for all earthen structures. Ponds should include a survey
of the pond bottom. Surveys should verify pond volumes are per design. Corrections may be required
for alterations from the design.
6. Plants, location and type.
7. Plans and profiles for all culverts, Pipes, Risers, Weirs and Drainage Structures- Display the
installed type of drainage structures, culvert/pipe size, weirs, materials, inlets or end treatment(s),
inlet and outlet protection, alignment and invert elevations compared to design.
8. Computations: For significant deviations from design, provide sealed computations verifying that
the as -built condition is equivalent or better than design.
9. Ditch Lines - Display the constructed location of all ditch lines and channels, including typical
sections and linings.
10. Easements - Show all platted easements with dead book references labeled. Facilities and drainage
must be within platted easements. Provide copies of recorded documents.
11. Guardrail, fences or other safety provisions - Display the constructed location of all safety
provisions; fences, guardrail, including the type, length and applied end treatments, compared to
design.
12. Material layers - biofrlter media, stone layers, sand layers, keyways and cores must be verified as to
material types and depths. Include inspection reports, boring or test pit reports and materials
certifications. Biofrlter media must be an approved state mix.
13. Access roads - show location of access roads, surface treatment, drainage, etc, as applicable.
14. Compaction reports are required to verify fill compaction in dams.
15. Manufacturers certifications for proprietary BMP's certifying proper installation and functioning.
STORMWATER MANAGEMENT FACILITY 'B' DETAIL
(SCALE OF 1"=10')
GENERAL SWM NOTES:
1. STATE APPROVED TRASH RACKS SHALL BE INSTALLED ON ALL ORIFICE OPENINGS. SEE VSMP AMENDMENT #3's APPROVED SHEET FOR
DETAILS OF THE ORIFICE's TRASHRACK AND THE RISER's TRASHRACK, OR EOUIVALENT.
3 9
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 VSMP AMENDMENT #3's APPROVED SHEET 9 FOR EMBANKMENT NOTES & DETAILS.
4. THE DOWNSTREAM EMBANKMENT SIDE SLOPES OFALL PERMANENT FACILITIES SHALL HAVE A MAXIMUM 3:1 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.
\PROPOSED FLAT VDOT CLASS Al RIPRAP
11, LINED OUTLET PROTECTION WITH FILTER
FABRIC UNDERLAYMENT TO EXTEND TO THE
CHANNEL'S BANK. RIPRAP TOP ELEV=424'.
\1 (L=5', W1=2', W2=5', D=1.5'
TO PREVENT FLOTATION THE RISER BASE SHALL BE FIRMLY \ \
EMBEDDED 6" INTO AN 18" THICK REINFORCED CONCRETE
FOUNDATION THAT IS 4'x4, AND BURIED BELOW GROUND.
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 p
(434.00'). RISER TO INCLUDE STATE APPROVED / -A 2'
TRASHRACKS ON ALL ORIFICE OPENINGS. SEE 01
VSMP AMENDMENT #3's APPROVED SHEET 9
FOR TRASHRACK DETAILS, OR EQUIVALENT.
/ \ \
Q
� CP
\ /PROPOSED0
/
/ \ ALLEYWAY O A.ERVE AS AC ESS \ Q
\ 03
TO THE DRY ASIN o'
53
APPROVED SLOPES HAVE BEEN
iDETERMINED TO BE LESS THAN 25%
BASED ON TOPOGRAPHIC EXHIBIT & 6
SURVEY PROVIDED BY ROUDABUSH,
GALE AND ASSOCIATES AS PERMITTED
UNDER SECTION 30.7.4(b)h (TYPICAL) \\
\ I Q \ PROPOSED BASIN's FLOOR SHALL
BE SLOPED TO DRAIN TO THE
\� RISER (o.5% MIN.) WITH POSITIVE
\ SLOPES THROUGHOUT.
SEE THIS SHEET FOR SCALED
PROFILES OFTHE DRY BASIN, TYP.
CONTRACTOR SHALL CALL THE COUNTY
INSPECTOR & ENGINEERING DEPARTMENT \ 70S0
24-HOURS BEFORE ANY ANTICIPATED \
CONSTRUCTION ACTIVITIES FOR THE DRY BASIN.
f � \
r o \
2:1
Al
�O \
k0
\� L
EXISTING MANAGED
STEEP SLOPES, TYP.
I N
1+00 1 \ M 1 25
\ \ / \ EXISTING PRESERVED
PROPOSED 56.2 LF OF \ STEEP SLOPES, TYP.
06" HQPE @ 1 2% \
([IL432.00'IC
, v \\\
0
\
PROPOSED 15' WIDE VDOT CL. Al RIPRAP
LINED EMERGENCY SPILLWAY W/ 4:1 SIDE \
SLOPES & FILTER FABRIC UNDERLAYMENT.
�\ SPILLWAY CREST ELEV.=438.50'.
5' WIDE TOP OF DAM
ELEV.=446oo'
\
\�\SWM FOREST & OPEN SPACE
EASEMENT (DB 04967, PG 133-134)•
EASEMENT IS A BEST MANAGEMENT
\ PRACTICE & PROHIBITS FUTURE
\ DEVELOPMENT& DISTURBANCES
- - PROPOSED VARIABLE WIDTH SWM \
ACCESS & MAINTENANCE ESMT.
RAPHIC SCALE~
( IN FIJ11
inch--- Pp fit.
100-yr PEAK WSE=438.
10-yr PEAK WSE=438.
2-yr PEAK WSE=437.
1-yr PEAK WSE=436.
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
TRASHRACKS ON ALL ORIFICE OPENINGS. SEE VSMP AMENDMENT
GRADE
445 #3's APPROVED SHEET 9 FOR TRASHRACK DETAILS, OR EQUIVALENT.
DAM
440 U I L L '1 I/ 1 1 440
435
GRADE
PROPOSED BASIN's FLOOR SHALL BE SLOPED
TO DRAIN TO THE RISER (0.5H MIN.) WITH
POSITIVE SLOPES THROUGHOUT.
TO PREVENT FLOTATION THE RISER BASE
SHALL BE FIRMLY EMBEDDED 6" INTO AN 18"
THICK REINFORCED CONCRETE FOUNDATION
THAT IS 4'x4, AND BURIED BELOW GROUND.
425RO
P06P HDPE @ 14.220A
424.0
PROPO$EDIFLA VDOT CLA SS AI
\ J 435
430
425
420 I I (L=5'. �V1=T, W2=5',
W W
Cl
ID
H
00
D
t
0
co w
.+
S
1
M
m
N
l7to
a
s
a
a
s
W L_
420
0+50 1+00 1+25
BASIN B SECTION
PROFILE
HORIZONTAL
GRAPHIC SCALE
C 25 50 100
( IN FEET )
1 inch = 5C ft.
VTRACTOR SHALL INSTALL EMBANKMENT
ACCORDANCE w/ THE NOTES AND
FAILS SHOWN ON THE APPROVED VSMP
ENDMENT #3's SHEET 9.
PRC
GI
445
445
5'WIDETO
OFDA
ELEV:
40.00'
440
;1
440
n
l
t
POSED
l
2ADE
1
435
435
430
430
WW
Cqo
�o
J J
W W
j
O d
O
C7 0
a
s a
3
W LL
EXISTING
GRADE
-PROPOSED 15' WIDE VDOT CL. Al RIPRAP
LINED EMERGENCY SPILLWAY w/ 4:1 SIDE
SLOPES & FILTER FABRIC UNDERLAYMENT.
SPILLWAY CREST ELEV. 438.50'.
0+5o
BASIN B SPILLWAY
PROFILE
VERTICAL
GRAPHIC SCALE
0 2.5 5 10
( IN FEET )
I inch = 5 II
Ln
N
W
Ul
z
J
J
0
U
N
CF
0
U
i
0
O
U
O
U
N
O
c
� N
U
c
rn
N °
N
V L
3
0
N
O
N
z 3
C) °
Cn
N � hJ-I °
N LQ
0 r N
Q 3
tl.l
> z p
0
W LU 06 c
J
L
N
W U
\ c
W CO
O o
� z 0
.o
O z 0
LU
L
Q LU
U Q -�
0
O z
Y Q
J
0
H tY T
LELU
°
U) > a
c
°
2
LU w
W
Of
O N
z
O
J o
w z
n/ ZD 0
Q
a
CD N
CD °
x
LU °
H c
W W E
W °
au'
JOB NO.
11518
SS HN0
ALEOAW°
c
cc
°
SHEET NO. a
10 N
L