HomeMy WebLinkAboutWPO201300032 Plan - E&S 2018-10-03COUNTY ENGINEER
Curve
Radius
Tange6t
Length
; Delta
Chord
Chord Bear.
C1
175.0(Y
9.65'
19.29
6'1856
19.28
S 26'01'23" W
C2
35.00'
33.50'
53.44'
8729'12"
48.40'
S 20)'52'55" E
C3
540.00'
56.77'
113.12
120V 7"
112.91'
N 70)'37'51" W
C4
35.00'
29.6Y
49.18'
$6'30'IC"
45.23'
N 63'07'02' E
C
01'
12.41'
24.79
6'18'47"
24.78'
N 26'01'24" E
2457.98'
314.76'
1 12-14-54"
314.16'
1N 13'34'20" E
Course
Bearing
Distance
L1
'09 S 76'34" E
11.47
L2
N 82'18'49" E
18.27'
L3
N 55'47'11" E,
24.40
L4
N 54'34'17" E
51.77'
L5
N 63'53'10" E
24.62'
16
N 78'35'38" E
53.53'
L7 .
S 88'54'21" E
14.91
L8
S 54'53'41" E
54.57'
L9
S 43'08'13" Er
141.55'
L10
S 53-42'27" S
02.87'
L11
S 17-46'15. E
166.27'
L12
S 10'30'18" W
81.51'
L13
S 26'34 07" E
85.75'
L14
S 11'11'50" E
193.39'
L15
S 42'58715 E
44 97'
L16
S 03-2749" W;
. 97.27'
L17
S 35.13 55" E
69.16'
L18
S 20'38'22" E
65.59'
L19
S 02'45'16" W
89.84'
L20
S 39'49'04" E
53.80'
L21
S 39'49'04" E
13.70'
C22
S 25'01'39" W
266.18'
L23
N 64'58'21" W
192.44'
L24
N 64'58'21" W
347.14
L25
S `49'20'31" W
113.71'
L26 `
S 22'51'58" W
53.92'
L27
N 22'51'58" E
61.25'
128
N 13'32'43" E
64.09'
L29
N 64'58'21" W
322.64'
L30
N 40'11 58" E
53.79'
L31
N 38'24'58" E
181.21'
L32
N 07'09'10" E
108.09'
L33
N 14-19'04" E
88.36'
TMP 62-25C
TMP 62-25C1
BROADUS MEMORIAL BAPTIST CHURCH
-CASON FARM RD.
DB 1109 PG 353
_..._ -.._.
DB 9 078 PC 97
NAIL SET IN
l9
10' PRIVATE EASEMENT WOOD BRIDGE�
S89'14'19"E
TO BROADUS CHURCH PROPERTY
194.32
DB 3662 PG 444
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1 230.17 T0
corn
CASON, WILLIAM
w
DB 793 PC 106
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MON. FOUND
TMP 62-25
TMP 78-59A \
�
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20' SANITARY SEWER EASEMENT
o
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DB 3662 PG 444
20' SANITARY SEWER EASEMENT
DB 3662 PG 444 CASCADIA DEVELOPMENT, LLC
� �CP
"PARCEL TWO"
TMP 78-59
J (� TMP 78-59A 1
o TMP 62-25 �o
o DB 4209 PC 088
TMP 78E-H ��� �55.266 ACRES (TOTAL) NIT @ 18" POPLAR
v - L -
FONTANA LAND TRUST " ``` �h I j /NEW
\
DRAIN,. ERMANEN EASEMENT TMP 78-59
DB 2436 PG 623 / 91 $ SW20 Or r Profiles
/. �2 hh TMP 78 57 PANTOPS-LAKERIDCE LLC. SW21 Storm
OSewerrofiles
20' RWSA ESMT, h DB 2805 PG 70
APPROVED
DB 859 PG 5T \ CASCADIA DEVELOPMENT, LLC �6939�59" �� Storm ewer Pro -files b the Al emarle DB 742 PG 195, 197 PLAT \��`- "PARCEL ONE" W 2j0 m Commuy' County
TMP 78-57A TMP 7L ONE 5, ! nity Dev topn ent De ar rnent
L28 60' iTp Orm ro it ail Date_ b ' p
C5 DB 4209 PC 088 Tq�� 4 File
KMH PROPERTIES LLC. �, ' � r
DB 3222 PC 519 G v�i v L2\ 2� 5.506 ACRES � StormCalculations �-
�, TMP 78E-H- -
FONTANA LAND 1
C;3 1 �8 0 OrIis
�23 TRUST
>2�
IN�9�� o >�E o ri
N �1
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78E-C > co VSMP AMENDMENT FOR WP0201300032
FONTANA OWNERS �3 THE STORMWATER MANAGEMENT CONTENT OF THE CODE OF DEVELOPMENT FOR CASCADIA STATES THAT:
FONTANA LAND TRUST ASSOCIATION, C 28i>�'� SU s�''N STORM WATER MANAGEMENT TO INCLUDE BOTH QUANTITY AND QUALITY CONTROL BMP'S WILL BE
100' VI c MA EL EASEMENT I�fsJoN°� A�C�, ��' PROVIDED ONSITE IN VARIOUS LOCATIONS THROUGHOUT THE CASCADIA DEVELOPMENT. THE PRESERVATION
DB 269 PG 284 S�' �g AREAS MAY COUNT TOWARDS STORMWATER QUALITY MANAGEMENT FOR ONLY THE DWELLING UNITS IN
SEE ALSO DB 867 PG 337 BLOCK 6 THAT CANNOT BE EFFECTIVELY DIVERTED TO THE STORMWATER MANAGEMENT PONDS AND OTHER
STRUCTURES ALONG ROU IL 20. FOR THESE RESIDENTIAL UNITS IN BLOCK 6, ROOF DRAINS AND
DRIVEWAYS MAY BE ALLOWED TO DISCHARGE UNCONTROLLED SO LONG AS THE DISCHARGE IS DISSIPATED
TO THE SATISFACTION OF THE COUNTY ENGINEER AND DOES NOT CAUSE EROSION.
THE EROSION AND SEDIMENT CONTROL BOND SHALL REMAIN ACTIVE UNTIL SUCH TIME AS THE 2:1 SLOPES
WITHIN BLOCK 6 ARE STABILIZED TO THE SATISFACTION OF THE COUNTY INSPECTORS.
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REVISIONS
CHANGE OF
DESIGN FIRM
APR. 26,2018
VSMP
AMENDMENT
MAY 24, 2018
EROSION
STABILIZATION
AREA ADDED
AUG 22, 2018
COUNTY
COMMENTS
SEPT.17,2018
COUNTY
COMMENTS
OCT. 2, 2018
DATE
APR. 17,2014
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COUNTY
COMMENTS
SEPT.17,2018
COUNTY
COMMENTS
OCT. 2, 2018
DATE
APR. 17, 2014
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FILE NUMBER
12.0065
SHEET
SWI 3B
PrIRefer to sheet SW13A
for channel outfall 'culvert under
trail and access road
r r
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10 0 10 20 30 BIO-FILTER #1 DETAIL
sW15 AND PLANTING ' PLAN
Sr'AI F• 1 �� _ 1 n' ---- ----
_ 8' CLEAN -OUT Tree Shrub Ivt rr\vltUllviv �i rr.)
BIOFILTER '
GRASS TOP OF BERM W/WATERTIGHT LANDSCAPING SPECIES Size Ht• #1
CAP
WEIR °I ALL CULVERT B REFERENCES HAVE ,BEEN 3`/ b` ;n N
B OF LTER
Red Maple 1.75 1 REMOVED FROM THIS SHEET, '` FILTER FABRIC (TYP.
1.5
(Aces rubrum) WD'
Cal. I E GABION BASKET WEIR WALL
^-� . >..'_.:.......::....:...... ...: _ :.. '..:.:: _ .:. _ ..... :........ .....__.. :. KEY GABION BASKET
Core*
EARTHFILL
\ \\306.2V�444 \ \} N` \� 1 �iA\ Gabion Vial \ adiig\is in e�Cisting \\ \
1 \ 9 \
rays alp \ i `; _ cV e �d` area. No\ \
` .. \
1 \ \ \ . an I cl�arin nee ed.
�.�' o sw -^ � 9 tz
Imp -,88 Sf, \ 1 \ \ \� M \ \ \
\ \ \
` •'4y
\ \
\
Grass Lined Channel n n I
\ / S \ \\ \ \
s \ \
\ \ \
1 \
ti
ase e t
\
-�..:
mn
\\\ \ 6 SCC-B DETAIL
_...........
._................
........ _ _ .........
.......
_..........
,! Culvert Type = Circular Concrete Veloc Dn (ft/s) = 4.30 \ \ ' \ ` `. \ \ \
Culvert Entrance = Square edge w/headwall (C) Veloc U ft/s = 5.16 \ \ uIV A \ \ \ \ \
Coeff. K,M,c,Y,k = 0.0098, 2, 0.0398, 0.67, 0.5 HGL Dn (ft) = 445.27 J,; \\ \ \ :. • \ \'' \ \ \ \ \ \
f i . HGL U ft = 445.29 \ ��e�`�90' Q \ \ \ \ \ HDPL \ \ \\ \ \ \ \ \ \
c Embankment Hw Elev (ft) = 445.84
0 0 \ \
Top Elevation (ft) = 446.50 Hw/D (ft) - 1.15 O � < � `` '� \ � , `•":�,•,•:" \ \ \ \ \ \
_ _ 9,9 \ \ \ \ ,• \ \ \
To Width ft 4.00 rn \ \
P O Flow Regime Inlet Control.. � Gt.- \ i \ � \ ... .� •.• .... \ ` \ \ � \ \
Crest Width (ft) _ 20.00 \ P ;" , \ , . . •. -,; '-_ . \
r \ \ Grass Swale #2.,
Imp. Area=6,350 Sf,
,
O q
Elev (d) CULVERF-A - Mtit 6ePth, inl447.00
3 P 1 •�. � \Q �� A,+ i� , \ '�� � \ ,\ \ \ ��. \, \ \ ,\ � � \ \
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45C
6 CULVERT A CALCULATION 1._
SW15 44t
Rip -Rap Outlet Protection
(See detail SW15)
/
% 44C
Culvert Report
HydraFlow Express Extension For AutoCADO Civil 3Dt& 2013 by Autodesk, Ina.
Monday, Aug 18 2014
CULVERT -A
Invert Elev Dn (ft)
= 444.20
Calculations
Pipe Length ft
P 9 )
= 11.50
Q min cfs -
(
= 8
4. 1
0
Sloe /
p (o)
1.74
Qmax (cfs)
-4.81
Invert Elev Up (ft)
_
= 444.4Q
Tailwater Elev (ft)
� (dc+D)/2
Rise i
1 n
( )
= 15.0
Shape
= Circular
Highlighted
Span (in)
= 15.0
Qtotal (cfs)
_ 4.81
No. Barrels
= 1
Qpipe (cfs)
= 4.81
n-Value
= 0.013
Qovertop (cfs)
_ 0.00
FILTER FABRIC WALL 2' TO BE PLACED 33 O.C. AS SHOWN
8� Sugar Hackberry SWALE #1 = 2' WEIR PROFILE
1.75" 1
SWALE #2 3' WEIR NO SCALE
(Celtis occide...... ... .... ...............................ntalls) (Cal.)
Grass Swale Sizing Calculations:
.......... ............. .. ..... ._ _............. _... ..... SECTION A -A Grass Swale #1 Drainage Area = 0,54 Acres
Z „ LOAM OR GRANULAR loll
NO SCALE- - - -
4 NON-PERFORATEDHeritage River Birch Clum 1
c-0.37; Tc-5 Min; 12 -5.5; I(10)-7.1
PVC PIPE (9 1% MIN, p = .10 cfs; Q(10)=1.38 cfs
Q(2) 1
SLOPE 4 PERFORATED PVC (Betula nigra) Grass Swale Sizing Calculations: V(2)=0.94 ft/s (Line with Grass)
PIPE @ 1% MIN, SLOPEp-�.�.F _ aw:a,,.wA
Grass Swale #1 Impervious Area: 2,880 sf.
*Impervious core shown for informational Total Trees provided 3 : Volume Required: 2,880 sf. X .5 = 117 cf.
s only. Final design to be provided
purpose Y 9 P Weir Calculation (Weir Length = 2'):
Arrowwood Viburnum 18t} Volume Provided, 130 cf. (65 cf. 'in two ponding cells. 3 r
by geotechnical engineer, 3
2 Year: 1.10 cfs-3.33(2 )(H 2) -> H= 0.30
(Viburnum dentatiam)m�.�
Grass Swale Sizin Calculations: 10 Year: 1.38 cfs=3.33(2')(H^2) -> H= 0.35'
+ Red Chokeberry 18 g
3 - Grass Swale #2 Impervious Area: 6,350 sf.
r ..._(Pyrus.::arbutifolia).. Grass Swale 2 Drainage Area =
SEE Note: For BF-1, Extend 4 wide by 1 deep rip -rap
Volume Required: 6,350 sf, X .5 = 265 cf. � 9 1.34 Acres
TOP OF GRASS channel to stream. Refer to sheet SP8 Summersweet
DETAIL Clethra alnifolia 18
2 Volume Provided = 288 cf. 72 cf. in four ondin cells. c=0,36; Tc=5 Min; I(2)=5,5; I(10)=7.1
EV= 430 BERM WEIR of the site plan for final grading. ( )) � p 9
BF#1 EL Q(2)=2.65 cfs; Q(10)=3.43 cfs
V(2)=0.80 ft/s (Line with Grass)
Total Shrubs provided g -
o
8 GRASS SWALE DETAIL Weir Calculation (Weir Length = 3'):
o SW15 NOT TO SCALE 2 Year: 2.65 cfs=3.33(3')(H-3) -> H= 0.41'
V= 428
10 Year: 3.43 cfs=3.33 3' H 3 -> H= 0. '
u ..
( )( 2)
49
UNDERD AIN R
..... , 4 ON PERFORATED
-- :....•':::, .,:...,.r:...:.:...::..-......... 50% SAND 30% TOPSOIL/ - N
:. /
c� ::._,>;.:..., ...........::::.....<.:::•. Grass Weir
20% LEAF MULCH PVC PIPE
(SAND: 0.02' -0.04, -
ASTM c33 FINE) BERM BERM ALL BIOFILTER _2 REFERENCES HAVE BEEN REMOVED FROM THIS SHEET. >;,Tx of
V= 424 v FILTER FABRIC D
1�
UNDERDRAIN GRAVEL (AASHTO M43,
PROVIDE PIPES Embankment Elev.=330.00 100 Yr. Elev=329.55 0 �
ACROSS ENTIRE WIDTH 1/2 -1) WRAPPED IN FILTER FABRIC A A
AT 20 FT O.C. 2:1 SIDE + 4, A �• ,L( SLOPES
r DAVID M. ROBINSON
(MAX) 2 Lic. No.
"CD IvV
Bio-Filter Sizing Calculations:
UNDERDRAIN f\\ A / OP
5676o w
DA-BF #1 Impervious Area: 22,500 sf.
4 PERFORATED _ .._.) I t/ ass E�yG
Bio-Filter Area Required: 22,500 X 5% = 1,125 sf.
JIM + PVC PIPE (� PIPE OUTLET TO IoxnL
Area Provided = 1,165 sf. L___ PIPE OUTLET r�
Grass Weir WELL-DEFINED .,... TO FLAT
rest Elev.=329.00 CHANNEL
AREA WITH
Bio-Filter Weir Sizing Calculations:
DA-BF ,#1 Drainage Area = 1.145 Acres
c=0.57; Tc=7 Min; 1(10)=6.5; I(100)=&4
Q(10)=4.24 cfs; Q(100)=5.48 cfs
Weir Calculation (Weir Length = 4'):
10 Year: 4.24 cfs=3.33(4')(H-') -> H= 0.47'
100 Year: 5.48 cfs=3.33(4')(HA2) -> H= 0.55'
M
2 BIO-FILTER SCHEMATIC
SW15 NOT TO SCALE -
(PLAN VIEW PLAN VIEW NO DEFINED
CHANNEL
jr At
EMERGENCY SPILLWAY
(7_
DETAIL FOR BF-1 L 12'
--- ' - ---
CLEAN -OUT
(TYP) - ___.__.. ._._..__....... - - --........-_ -
- d = 12" I III d=12"
SECTION A -A .
FILTER CLOTH
KEY IN 6"-9"; FILTER CLOTH KEY IN 6"-9";
RECOMMENDED FOR RECOMMENDED FOR
TYPICAL PLANTING SCHEMATIC SECTION A -A
ENTIRE PERIMETER ENTIRE PERIMETER
(Median Stone Size) -
BIO-FILTER �1 (SEE 1 /SW16)
Outlet
Structure '
Diameter
Pipe (in)
Discharge
(cfs)
Apron Length
(ft)
Upstream
Apron Width (ft)
Downstream
Apron Width (ft)
Riprap
Stone Size
CULVERT A
15"
4.81
8
3.75
7.00
Class Al
('9_ OUTLET PROTECTION TABLE
5�1�15 Not To Scale
\ \ \ ar, i ral ,
\ \ '•°';> \ SWIM Access & mintq enre
ad Stream Buffer
450 Miti ation Easement
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v v D PG 660-67
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APR. 25, 2018
VSMP
AMENDMENT
MAY 24, 2018
EROSION
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AREA ADDED
AUG. 22,2018
COUNTY
COMMENTS
SEPT. 17, 2018
COUNTY
COMMENTS
OCT. 2, 2018
DATE
APR, 17, 2014
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STREAM BUFFER IMPACT AREA
STREAM BUFFER MITIGATION AREA
EROSION STABILIZATION AREA
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27.3% Sorghastrurn nutans, NY4 Ecotype (Indiangrass, NY4 Ecotype) STABILIZATION AREAS
20.0% Lolium multiflorum (Annual Ryegross) SEED RATE: 60LBS PER ACRE
11.0% Andropogon gerardii, 'Niagara' (Big Bluestem, 'Niagara') EROSION STABILIZATION AREA 24,450 SF
10.0% Elymus virginicus, PA Ecotype (Virginia Wildrye, PA, Ecotype) Container grown seedlings tubes
at 700 per acre
7.0% Elymus canadensis (Canada Wildrye) approximately 8'x8' on center:'
450 sqft
6.1% Sc'hizachyrium scoparium, Albany Pine Bush —NY Ecotype (Little, Bluestem,. Albany 24:45O/(8'x8') sf = 383 seedlings tubes
Pine Bush —NY Ecotype)
5.0% Tridens flavus (Purpletop) 383 grown seedling tubes.
4.0% Agrostis perennans, Albany Pine. Bush —NY Ecotype (Autumn Bentgrass, Albany Pine
Bush —NY Ecotype)
3,0% Panicum virgatum, 'Shelter' (Switchgrass, 'Shelter')
1.3% Chamaecristo fasciculata, PA Ecotype (Partridge Pea, PA Ecotype)
1.27, Echina.cea purpurea (Purple Coneflower)
1.0% Coreopsis lanceolata (Lanceleaf Coreopsis)
1.0% Rudbeckia hirta, Coastal Plain NC Ecotype (Blackeyed Susan, Coastal Plain NC
Ecotype)
0.8% Heliopsis helianthoides, PA 'Ecotype (Oxeye Sunflower, PA Ecotype)
0.5% Aster lateriflorus (Calico Aster)
0.3% Asclepias syriaca, PA Ecotype (Common Milkweed, PA Ecotype)
0.3% Liatris spicata (Marsh (Dense) Blazing Star (Spiked Gayfeather))
0.2% Monarda fistulosa, Fort Indiantown Gap —PA Ecotype (Wild Bergamot, Fort
Indiantown Gap —PA Ecotype)
STREAM BUFFER DISTURBANCE:
Mitigation Plantings
*
(bare root seedlings or
whips at 1,210 per acre,
Impact Area 1: 12,432 SF
approximately 6' x 6' on
center)
Impact Area 2: 12,439 SF
Medium to Large Deciduous Trees
24,871 SF
Acer rubrum
Red Maple
Betula lenta
Black Birch
MITIGATION AREA REQUIRED:
Liquidombar styraciflua
Sweetgum
2 x IMPACT AREA
Small Canopy/understory
Trees
2 x 24,871 SF = 49,742 SF
Amelainchier canadensis
Serviceberry
Cercis canadensis
Redbud
MITIGATION AREAS PROVIDED.
Magnolia virginiana
Sweetbay Magnolia
Evergreen Trees
51,150 SF
Magnolia grandiflora
Southern Magnolia
Evergreen Shrubs
Kalmia latifolia
Mountain Laurel
Rhododendron viscosum
Swamp Azalea
Taken from "Riparian Buffers
Large Shrubs
Modification and Mitigation
Cornu's stolonifera
Redtwig Dogwood
Guidance Manual" by DCR,
Hamaimelis virginiana
Common Witchhazel
chapter 5.1, Reforestation/
Small Shrubs
Establishment Table B. 5—year
Clethria alnifolia
Sweet Pepperbush
maintenance and performance
guarantee required.
Herbaceous Plants
Chelone Iyonii
Pink Turtlehead
Iris cristato
Crested Iris
Lobelia cardinalis
Cardinal Flower
Podophyllum peltaturn
Mayapple
OF
DAVID M. ROBINSON
Lic. No.
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COUNTY
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COUNTY
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