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NORTH FORK
/
S.R. 606 ,
Pre!riBUSIptive' EasementN PARK-
Bfo tention F �.
s �
D, ention _
S' stem od
Optional - 1'
! i e *,% Diversion/
Albemarle County, Virginia Diversion / `*1, '�',,, Infiltration Ditch
Infiltration Di h \ /
1 ',6.88•aC esi •^ . • • �• •., • ',''yy,, fIL,,,/� \1\\\N\11\\� ' i
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Dlven 1 ,
Biorefenti, r r '
Infilt
Detenti 3 //
Syste •' • .
Bioretention;
Detention /
Diversion / _ . System : a
Infiltration tch
f Bioretenti n
Detention
- Detention:' /
• 1' , Pond '• �''�`
.
Diversion .....�......�.--\\ • •'3,,,��y,, •' o O
Infiltratign i1�11 •�; 1 4nuu,uurrrrtk,
! Reeradable Impervious Area � ,,•` ; _J Resource Protection Area
/ �19 acres~; �.•....,,. , Z - (R.P.A.) Limits
j r O
r,
t - 10.06 acres - \ .
.E _ ..fi ,, , ', ; 'ter �; :;i . , . - __- • • �• .'''• " .•-�: • ,..�,,, • ' • ` � •
r•.• Existing Reterit�o - \\c ` ;:A�\�,. - % A� -
Pond — Upgrade 1 ' . I
`\\(� • ra �, �i f / •~'" I �r/'.' -'%'• _.NI It) `
ice: /'l F' :•'� / r L // �' �'�uuulr�`.,' �' I
J ',: ,:• •�,`S / 10.68 acres
'�(� ''— _ r•• ' �. �\, � � / B' /. ', ':•• • , " _ � r ''/i,,� 1 1, 1.
rl`yr ft `'•, __jTermd, t..-
N'
e, o % Reten son Pond {'
B 2 _
.'\ 7.18acres
l
}• , �7i'" ,J►:'• L-t ;; •\� 48 acres \� 31.50 acres.-.-
•' 606- `� ` � �' _ Existing etention
o C�..'' Eases ';f. .•�"� - __ - ;Q i - o Be Remdved
;�SCS��ti�e t,, \ • , _ ,' 5,.65 acres'•- r ,/; `1 ' - a 1` - .' ! : _ - - _ = / Qci /. a� .
15. 4 acres
—�, 21.07 acre$1 �'o - i •••`' 1 `�� ))) \i
v 63 a es '(. �'-• - - '... , , �.- r ;
/� `� ' f` ' - '• Permanent f'
�` \ �; , ; I' • 33.26 acres RetentionPofld
1,0
/ o t 1.-_ ! .+,•, I,'''''• • ..itnfinfiestjO�ttretrn
1M 6165 acres\
e
:Z�-
u
Retention Pon atw
/ 8.21 acres//
B — 1 0
18.57 acresy ,t•``i�^
Rete
E sin pgraded'
F-4 ;.
acres %? 19.97 acres
13.51 acres
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SWM Phasing
Pond A to be In place within a year of Issuance of the first
Acertificate of occupancy for any development within the
pond's watershed area or within a year of Issuance of -
completion of construction of any portions of Road A within
the pond's watershed ate4,
Pond B to be in place within a year of issuance of the fast
Bcertificate of occupancy loc any development within the
poxxl's watershed area.
Pond C to be in place within a year of Issuance of the first
C' certificate of occupancy for any North Fork development
within the pond's watershed area excluding any
development accessing the existing Quail Run Road or S.R.
606 or within a year of Issuance of completion of
construction of any portion of Road A within the pond's
Watershed area. -"
Pond D to be upgraded within a year of issuance of the first
Dcertificate of Occupancy for any panel within the pond's
watershed area excluding any development accessing the
existing Quail Run Road a within a year of issuance of
completion of any lard construction within the pond's
watershed area.
Pond E to be upgraded within a year of issuance of the fast
Ei certificateof occupancy for any development within the
pond's watershed area at within a year of Issuance of
completion of any road construction within the pond's
watershed area.
Diversionn/lnfilualion Ditches and appurtenant
�....�,d Bioretention/Detention Pones Facilities to be designed and
constructed where appropriate as the first step of any earth
moving or grading operation for any ppoortion of Parcel 13-1 or
Parcel A. Detention Pond or similar Stormwater
Manageme� system to be designed and constructed as the
ql any earth moving or grading operation for road
first step
construe outside and north of Pond -F"s watershed area.
i
STORMWATER MANAGEMENT & BMPS'
EXHII3[T 4.2
Dotes
1. All stormwater management/BMI1s Ah 4n on this plan are
conceptual only and are subject to further refinement and design.
2 The existing wetland areas are to be_ome a part of the overall
stormwater management system for the park on an area wide
basis. All wetland areas are to remain undisturbed except where
required for construction of utility extensions, roads, trails or other
BMPs.
3. Permanent retention ponds are to be implemented within '
watershed basin areas of adequate size to support a normal water
level.
4. Permanent retention ponds are located in areas to encompass the
majority of developed parcel area.
3 Specific erosion control measures will be designed in conjunction
with access road construction using the Virginia Erosion Control
Handbook and in accordance with standard Albemarle County
Department of Engineering requirements.
6 Bioretention facilities are encouraged along the northern ridge and '
at other locations where feasible.
T. Parcel grading along the northern ridge shall be such that all
impermeable surface area drainage is directed to the east or south
across the existing drainage divide to flow into the North Fork
Rivanna River south of the existing raw water intake.
S. The developable ton -impervious area draining west toward Route_
606 has been determined to be approxirrrately 3 acres. BMP's shall.,
be implemented for this area to filter all runoff water before
exiting the site. All measures are to be approved by the Albemarle I
County Department of Engineering.
9. Site specific stormwater ranagement/13ME's which will be
designed at time of final site plan submittal for each parcel to
supplement and/or replace the conceptual measures shown on
this plan
101mplementation of stormwater management and BMP System M.M.
is contingent on permitting from the various regulatory agencies
and is to be determined at it later date.
11.AR existing pond upgrades will be performed at such time as to
acco u\t.for increased runoff due to upland watershed
development.
Legend
�—• Diversion Ditch / Dike
�••••••••••'••••'• Drainage Divide
—m Watershed Limits
Drainage Flow
Blltuuttltltltu Resource .Protection
Area (R.P.A.) Limits
Prepared for:
University of Virginia
Real Estate Foundation
Charlottesville, Virginia