20190889 Ver 2_Stormwater Site Plans_20191028

NVVESTCOTT, SMALL
NN's — & AssOC'iATES
ENGINEERING I PLANNING I CONSULTING
EC8VNRv©Wa
Date: October 22, 2019
OCT 2 9 `. ; ,9
WaUK k.:a ,�.:•s
To: Chonticha McDaniel From: Victoria Waldron Sma11, S3-'zQM'Qn
401 Stormwater Engineer Westcott, Small & Associates, PLLC
Division of Water Resources 125 S. Elm Street, Suite 606
Greensboro, NC 2740
We are sending you ® attached ❑ under separate cover the following items:
❑
Shop Drawings
❑
Estimate
❑ Disk
®
Prints
❑
Specifications
® Other
❑
Contracts
❑
Copy of Letter
# COPIES
DRAWING NO
DESCRIPTION
DISPOSITION
1
Set of Supplement EZ Forms
For Your Use
for Zoo Expansion
1
Set of Storm Calculations for
For Your Use
Zoo Expansion
1
Drainage Area Maps for Zoo
For Your Use
Expansion
1
Storm Drainage Plans for Zoo
For Your Use
Expansion
1
Set of Level Spreader Plan &
For Your Use
Details for Zoo Expansion
REMARKS:
cc: File
125 S. Elm Street, Suite 606 • Greensboro, North Carolina 27401 • phone: [phone] • web: www.wsaaeng.com

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Greensboro Science Center Zoo Expansion
2
Project Area ac
343
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
12.4
5
Is this project High or Low Density?
low
6
Does this project use an off -site SCM?
no
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
50
8
Will the vegetated setback remain vegetated?
yes
9
Is BUA other that as listed in .1003 4 c-d out of the setback?
yes
10
Is streambank stabilization proposed on this project?
no
NUMBER AND TYPE OF SCM �
11
Infiltration System
0
12
Bioretention Cell
0
13
Wet Pond
0
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
1 Sand Filter
0
17
Rainwater Harvesting RWH
0
18
Green Roof
0
19
Level Spreader -Filter Strip LS-FS
1
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
Bayfilter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
1 Name and Title:
Michael B. Westcott
28
Organization:
Westcott, Small & Assoc.
29
Street address:
125 S. Elm St., Suite 606
30
City, State, Zip:
Greensboro, NC 27403
31
Phone numbers :
336.310.9722
32
Email:
[e-mail]
Certification Statement:
I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or
supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete, and
that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent
with the information provided here.
Signature of Designer
i�/,/9
Date^�

DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
0
3
Is all/part of this project subject to previous rule
versions?
No
CLICK TO LOAD FORM
DRAINAGE AREA INFORMATION
Entire Site
4
Type of SCM
LS-FS
5
Total BUA in project (sq ft)
517057 sf
6
New BUA on subdivided lots (subject to permitting)
sq ft
sf
7
New BUA outside of subdivided lots (subject to
permitting) (sf)
78408 sf
8
Offsite - total area (sq ft
sf
9
Offsite BUA (sq ft)
sf
10
Breakdown of new BUA outside subdivided lots:
- Parkin (sq ft)
sf
- Sidewalk (sq ft
- R of (sq ft)
- Roadway (sq ft
- Future (sq ft)
sf
- Other, please specify in the comment box
below (sq ft)
78408 sf
11
New infiltrating permeable pavement on subdivided
lots (sq ft)
sf
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft)
sf
13permitting)
Exisitng BUA that will remain (not subject to
(sq ft)
438693 sf
14
Existing BUA that is already permitted (sq ft)
454810 sf
15
Existing BUA that will be removed (sq ft
161172 sf
16
Percent BUA
3%
17
1 Design storm (inches)
18
Design volume of SCM (cu ft)
19
1 Calculation method for design volume
ADDITIONAL
INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):
LS-FS designed to treat 10 year strom from pipe outlet. See attached storm
drainage calculations as required by the City of Greensboro

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
1
Is project below density thresholds set forth in the applicable stormwater rule?
yes
2
Does project maximize dispersed flow and minimize channelization of flow?
yes
3
Has the use of piping been minimized per .1003(2)(c)?
yes
4
Side slopes of the vegetated conveyances (H:V)
none proposed
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
none proposed
6
Are curb outlet swales proposed?
no
7
Maximum longitudinal slope of curb outlet swale(s) (%)
8
Bottom width of curb outlet swale(s) (feet)
9
Maximum side slope of curb outlet swale(s) (H:V)
10
Minimum length of curb outlet swale(s) (feet)
11
Are treatment swales used instead of curb outlet swales?
no
12
Is stormwater released at the edge of the setback as dispersed flow?
yes
13
Have stormwater outlets been designed to prevent downslope erosion?
yes
14
Are variations to rule .1003 proposed?
no
ADDITIONAL
INFORMATION
15
1 Please use this space to provide any additional information about this low density project:
Additional vegetated swales are not proposed in this phase. The overall site is 3% impervious and includes existing vegetated conveyances
and some pipes. This phase of development will include two new piped storm drainage systems since piped drianage is necessary in/near
exhibits for safety and containment. Outlet 100 will be treated with a LS-FS to obtian diffuse flow prior to the buffer. Outlet 200 will discharge
directly to the buffer, be treated with erosion control and energy dissipation measures and the buffer disturbance was included in the buffer
authorization permit issued bX DEQ on 9/12/19.

LEVEL SPREADER - FILTER STRIP (LS-FS) :I
1 1
Drainage area number
1
2 IDesign
volume of SCM (cu ft)
GENERAL
MDC FROM 02H .1050
3
Is the SCM sized to treat the SW from all surfaces at build -out?
yes
4
Is the SCM located away from contaminated soils?
yes
5
What are the side slopes of the SCM (H:V)?
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
no
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
no
9
lWhat is the method for dewatering the SCM for maintenance?
Other
10
1 If applicable, will the SCM be cleaned out after construction?
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
12
Does the drainage easement comply with General MDC (9)?
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
16
Does the SCM follow the device specific MDC?
yes
17
Was the SCM designed by an NC licensed professional?
yes
LS-FS MDC FROM 02H .1059
18
Length of level spreader (feet)
28 ft
19
Does the LS-FS receive flow from the drainage area or another
SCM?
Yes
20
Flow rate to LS-FS during design storm (cfs)
3 cfs
21
Is a bypass device provided?
no
22
If yes, what is the bypass device?
23
Is this LS-FS designed to receive flow from the drainage area during
the 10-year storm?
24
Has a blind swale been provided?
yes
25
Does the blind swale provide for uniform overtopping of the level
spreader?
yes
26
What material will be used for the level spreader?
concrete
27
Will the construction tolerance be < 0.25 inch along the level
spreader length?
Yes
28
Will the level spreader be straight or convex in plan view?
Yes
29
Height of the drop from the level spreader to the transition zone
(inches)
1 in
30
JWidth of the transition zone (inches)
12 in
31
Protection for the transition zone
Aggregate
32
Width of the filter strip (feet)
30 ft
33
Is the filter strip free of draws and channels?
yes
34
Has this been verified in the field?
yes
35
Slope of the filter strip (%)
1 %
36
Is this slope uniform across the entire filter strip?
yes
37
Will the first 12" of soil be adjusted if needed to promote plant
growth?
yes
38
Will the filter strip and side slopes be planted with non -clumping,
deep-rooted sod?
yes
39
Species of sod that will be used
Centipede or
Bermuda
40
Will soil be temporarily stabilized until permanent vegetation is
established?
yes
ADDITIONAL
INFORMATION
77e
use this space to provide any additional information about the
spreader-filter strip(s):
Bypass is not provided because the level spreader is sized for the 10-year
storm. Forebay is not provided because the entire blind swale is filled with
riprap. Drainage easement is not provided because the land is public.
Maintenance area is not defined since the site is public and access to the
area must be coordinated with the Greensboro Science Center for safety.
LS-FS 1 4:54 PM 10/21/2019

Storm Sewxs v11.00

Storm Sewer Tabulation
Page 1
Station
Len
Dmg Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vel
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(1)
flow
full
Line
To
Incr
Total
Incr
Total
Inlet
Syst
Size
Slope
Dn
Up
Dn
Up
Dn
Up
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/ttr)
(cfs)
(eft)
(ft/s)
(in)
(%)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
5
2
60.730
0.22
0.22
0.65
0.14
0.14
10.0
10.0
5.6
0.80
4.61
1.32
15
0.51
826.36
826.67
827.17
827.18
830.93
829.60
STP-104
4
3
80.881
0.19
0.19
0.65
0.12
0.12
10.0
10.0
5.6
0.69
6.46
3.08
15
1.00
830.30
831.11
830.58
831.43
833.78
836.78
STP-103
3
2
98.436
0.28
0.47
0.65
0.18
0.31
10.0
12.4
5.2
1.58
4.56
2.66
15
0.50
826.36
826.85
827.17
827.35
830.93
833.78
STP-102
2
1
87.783
0.07
0.76
0.65
0.05
0.49
10.0
13.6
5.0
2.45
4.57
3.60
15
0.50
825.73
826.17
826.47
826.80
828.66
830.93
STP-101
1
End
97.199
0.12
0.88
0.65
0.08
0.57
10.0
14.3
4.9
2.78
4.59
3.94
15
0.50
825.04
825.53
825.71
826.26
825.07
828.66
STP-100
Project File: storm 100.stm
Number of lines: 5
Run Date: 5/13/2019
NOTES:Intensity = 66.89 / (Inlet time + 12.20) ^ 0.80 ; Return period =Yrs. 10 ; c = cir e = ellip b = box
Storm Sewers v1'1.00

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Storm Sowers VI 1.00

Storm Sewer Tabulation
Page 1
Station
Len
(ft)
Dmg Area
Rnoff
coeff
(C)
Area x C
Tc
Rain
(1)
(in/hr)
Total
flow
(cfs)
Cap
full
(cfs)
Vel
(ft/s)
Pipe
Invert Elev
WGL Elev
Grnd / Rim Elev
Line ID
Line
To
Line
Incr
(ac)
Total
(ac)
Incr
Total
Inlet
(min)
Syst
(min)
Size
(in)
Slope
(%)
Dn
(ft)
Up
(ft)
Dn
(ft)
Up
Of)
Dn
(ft)
Up
(ft)
1
End
53.00
0.23
0.23
0.65
0.15
0.15
10.0
10.0
5.6
0.84
0.86
2.40
8
0.51
825.71
825.98
826.89
827.14
828.65
828.91
STP-200
Project File: storm 200.stm
Number of lines: 1
Run Date: 5/14/2019
NOTES:Intensity = 66.89 / (Inlet time + 12.20) A 0.80 ; Return period =Yrs. 10 ; c = cir e = ellip b = box
Storm Sowm v,,.00

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N
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W
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Storm sowers A t.Oq

Storm Sewer Tabulation
Page 1
Station
Len
Ding Area
Rnoff
Area x C
Tc
Rain
Total
Cap
Vel
Pipe
Invert Elev
HGL Elev
Grnd / Rim Elev
Line ID
coeff
(1)
flow
full
Line
To
Incr
Total
Incr
Total
Inlet
Syst
Size
Slope
Dn
Up
Dn
Up
Dn
Up
Line
(ft)
(ac)
(ac)
(C)
(min)
(min)
(in/hr)
(cfs)
(cfs)
(f 1s)
(in)
(%)
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)
1
End
48.16
0.00
0.32
0.00
0.00
0.21
10.0
22.9
3.9
0.81
4.56
2.80
15
0.50
841.86
842.10
842.21
842.46
844.80
846.48
STP-300
2
1
43.12
0.05
0.32
0.65
0.03
0.21
10.0
22.2
3.9
0.82
4.61
2.84
15
0.51
842.30
842.52
842.66
842.88
845.48
853.38
STP-301
3
2
43.28
0.02
0.02
0.65
0.01
0.01
10.0
10.0
5.6
0.07
4.60
1.39
15
0.51
849.78
850.00
849.89
850.11
853.38
854.96
STP-304
4
2
131.60
0.14
0.25
0.65
0.09
0.16
10.0
14.3
4.9
0.79
4.57
2.80
15
0.50
842.72
843.38
843.07
843.73
853.38
847.95
STP-302
5
4
84.06
0.11
0.11
0.65
0.07
0.07
10.0
10.0
5.6
0.40
4.56
2.29
15
0.50
843.71
844.13
843.96
844.38
847.95
847.07
STP-303
Project File: storm 300.stm
Number of lines: 5
Run Date: 5/14/2019
NOTES:Intensity = 66.89 / (Inlet time + 12.20) A 0.80 ; Return period =Yrs. 10 ; c = cir e = ellip b = box
Storm Sewem v1,.00

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cu
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Grnd. El. 844.80
All
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Rim El. 845.48
Inv. El. 842.10 Out
Inv. El. 842.30 In
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Inv. El. 843.38 Out
Inv. El. 843.71 In
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WATER MANHOLE 11-
I
LANDSCAPE BUFFER AND TREE PROTECTION NOTES: TOP: 859.41'
(VALVE ON 24" DIP) i
...-- 1. CONTRACTOR SHALL INSTALL TREE PROTECTION FENCE BETWEEN ALL AREAS OF � t�s
GRADING/DISTURBANCE AND THE STREET LANDSCAPE YARD ALONG ORMAN ROAD.
O H U -- --- G z
CMNF / HU OHU OHU---W�_W -
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y._ 15 S T BACK
p µ 2. N e E T F I-fi'I'RAC
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NOTES:
E
PER COG DEVELOPMENT ORDINANCE
30-9-4.7(D) THE BOTTOM STRAND OF THE
I RABBIT BUIBARBED WIRE MUST BE AT LEAST 6' ABOVE
\ LDING .
. . .'. . GRADE.
S GV
866.10
w �� T ANIM4L HUS��AN`
_ BUILDING.
�a O NOTES:
1. NO PERIMETER LANDSCAPING IS PROPOSED. MAINTAIN EXISTING VEGETATION
�ALONG LAWNDALE DR. FOR STREET YARD.
I I 2. THE PROPOSED DEVELOPMENT COMPLIES WITH THE OUTDOOR LIGHTING
STANDARDS OF THE ORDINANCE, INCLUDING COMPLIANCE WITH THE LIGHT
II I TRESPASS REQUIREMENTS OF 30-9-6.6.
O 3. THE ONLY BUILDING THAT WILL HAVE PUBLIC ACCESS IS THE ANIMAL
LOT DIMENSIONS HOSPITAL. IT WILL HOUSE RESTROOMS FOR THE PUBLIC VISITING THE ZOO.
1�8t6' o MINIMUM LOT SIZE (SQ. FT.) 10 ACRES THE REMAINDER OF THE PROPOSED BUILDINGS WILL ONLY BE ACCESSED BY
I h STAFF AND THE ANIMALS.
MINIMUM LOT DEPTH (FT.) 300 4. NO VEHICLES SHALL QUEUE IN THE PUBLIC RIGHT—OF—WAY.
MINIMUM LOT WIDTH FT. 300
� ( ) 5. REPAIR/REPLACE ANY DAMAGED OR MISSING SIDEWALK ALONG PROPERTY
_ c SETBACKS (MINIMUM FT.) FRONTAGE PER COG 418-A.
MINIMUM STREET SETBACK (FT.) 50 6. NO STRUCTURE OR ITS AREA OF INFLUENCE IS ALLOWED VATHlN WATER OR
°Dn D MINIMUM SIDE AND REAR SETBACK FT. SEWER EASEMENTS TO THE BOTTOM OF THE APPLICABLE UTILITY.
OHU "\\ ( ) 7. A TYPE 1 MODIFICATION FOR EXEMPTION FROM SIDEWALK WAS APPROVED BY
' _— - OHU C/p ADJACENT TO RM-5, RM-8, AND ALL R- DISTRICTS 35 THE GDOT DIRECTOR.
O U OHU ---- OHU \ ADJACENT TO ALL OTHER DISTRICTS 35 8. A MODIFICATION TO THE 15' FENCE SETBACK WAS APPROVED BY THE
�// BUILD —TO LINE PLANNING DIRECTOR.
DISTANCE FROM EDGE OF STREET RIGHT OF WAY (FT.) N/A
PERCENTAGE OF FACADE THAT MUST BE LOCATED ON OR IN FRONT OF THE BUILD -TO -LINE N/A
BULK (MAXIMUM) HEIGHT (FT.) / NUMBER OF STORIES
O ADJACENT TO RESIDENTIAL DISTRICTS 50/3 ENGINEER'S CERTIFICATION OF QUANTITY CONTROL:
ADJACENT TO ALL OTHER DISTRICTS 50/3 THE 10% POINT IS LOCATED UPSTREAM OF THE
SITE OUTLET, THEREFORE NO ADDITIONAL QUANTITY
CONTROL IS REQUIRED.
PROPOSED IMPROVEMENTS: 4.43 AC
_ DRAINAGE AREA AT SITE OUTLET: 437 AC
o = ° ;; r QUALITY CONTROL WILL BE THROUGH USE OF A
I O SCORE SHEET. THE DEVELOPED AREA OF THE SITE
I GRAPHIC SCALE IS LESS THAN 24%.
50 0 25 50 100
Z
OJa
F
i inch = 50 ft.
8`

SELF -INSPECTION REPORT FOR LAND DISTURBING ACTIVITY AS
...__ _..._..I
REQUIRED BY NCGS 113A-54.1
I-r-
_
_
....... --
L...__
Phase of Approved Erosion and Sedimentation Control Plan:
Date
Signature (Landowner, Financially
Responsible Party or Agent)
Installation of perimeter erosion and sediment control measures
Clearing and grubbing of existing round cover
Completion of any phase of grading or sio es for fills
i
Installation of storm drainage facilities
Completion of construction or development
Establishment of permanent ground cover sufficient to restrain erosion
LANDSCAPE BUFFER AND TREE PROTECTION NOTES:
1. CONTRACTOR SHALL INSTALL TREE PROTECTION FENCE BETWEEN ALL AREAS OF
GRADING/DISTURBANCE AND THE STREET LANDSCAPE YARD ALONG ORMAN ROAD.
A.) CONTACT THE CITY URBAN FORESTER TO SET UP A PRE
CONSTRUCTION MEETING PRIOR TO ANY TREE DISTURBANCE.
B.) ALL TREE PROTECTION DEVICES MUST BE INSTALLED PRIOR
TO INSPECTION BY CITY URBAN FORESTER OR ENFORCEMENT
OFFICER AND PRIOR TO ANY TREE DISTURBANCE ACTIVITIES.
C.) REMOVAL OR DAMAGE OF TREES IN THE TREE CONSERVATION
AREA WILL BE SUBJECT TO THE PENALTIES ESTABLISHED IN
30-5-4.10(PENALTIES) OF SECTION 30-5-4 LANDSCAPING AND
TREE PRESERVATION REQUIREMENTS.
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t _
NEW STABILIZATION TIMEFRAMES
(Effective Aug. 3, 2011)
SITE AREA DESCRIPTION
STABILIZATION
TIMEFRAME EXCEPTIONS-
O Perimeter dikes, swales, ditches, slopes
7 days
None
AHigh Quality Water (HQW) Zones
7 days
None
Slopes steeper than 3:1
7 days
If slopes are 10' or less in length and are
not steeper than 2:1, 14 days are allowed.
Slopes 3:1 or flatter
14 days
7 days for slopes greater than 60' in length.
All other areas with slopes flatter than 4:1
14 days
None, except for perimeters and HQW Zones.
TREE PRESERVATION AREA
TABLE
MAX. REQUIRED AREA = 4.43 AC
x 10% = 0.44 AC
PREY. REQUIRED AREA 5.30 AC
x 10% = 0.53 AC
TOTAL REQ'D TREE PRESERVATION
AREA = 0.97 AC
EX. TREE PRESERVATION AREA =
2.00 AC
**SEE SHEET C4.0 FOR LOCATION OF TREE CONSERVA I IUN AREA
TREE PRESERVATION NOTES:
NO DISTURBANCE IS ALLOWED WITH IN THE TREE CONSERVATION AREA
EXCEPT AS NOTED ON THE APPROVED PLAN OR WITH PRIOR
APPROVAL FROM URBAN FORESTER. THE TREE CONSERVATION AREA
INCLUDES THE CRITICAL ROOT ZONE AREA.
ALL PROPOSED IMPROVEMENTS ARE LOCATED ACROSS THE CREEK
FROM THE PROPOSED TREE CONSERVATION AREA. THEREFORE NO
TREE PROTECTION FENCE SHALL BE INSTALLED. HOWEVER, IF
PROPOSED GRADING, CLEARING OR DEVELOPMENT ENCROACHES
TOWARD THE CREEK AND BEYOND THE LIMITS OF DISTURBANCE
INDICATED ON THE PLAN, OR AT THE DIRECTION OF THE URBAN
FORESTER, THE CONTRACTOR SHALL PROVIDE TREE PROTECTION FENCE
OUTSIDE OF THE REQUIRED UNDISTURBED CRITICAL ROOT ZONE.
PENALTIES FOR DISTURBANCE OF THE CRITICAL ROOT ZONE AND/OR
TCA SHALL APPLY.
TREE PROTECTION FENCING SHALL REMAIN IN PLACE UNTIL
CONSTRUCTION IS COMPLETE AND OTHER LANDSCAPING HAS BEEN
INSTALLED, AND THE CITY URBAN FORESTER OR ENFORCEMENT OFFICER
HAS APPROVED ITS REMOVAL.
NO PARKING, STORAGE, DIRT STOCKPILING, CONCRETE WASHOUT OR
ANY OTHER ACTIVITIES IS PERMITTED IN THE TREE CONSERVATION
AREAS.
CONTACT THE URBAN FORESTER AT 373-2150 TO SET UP
A PRE -CONSTRUCTION MEETING PRIOR TO LAND
DISTURBANCE.
ALL TREE PROTECTION DEVICES MUST BE INSTALLED PRIOR TO LAND
DISTURBANCE, INCLUDING THE CUTTING OF ANY TREES. A PENALTY OF
$500.00 PER DAY FOR FAILURE TO INSTALL APPROVED TREE
PROTECTION MEASURES MAY APPLY
THE CONTRACTOR SHALL FAMILIARIZE HIMSELF WITH ALL TREE
PRESERVATION REGULATIONS AND INSPECTION REQUIREMENTS.
NV.: 4 i 8. INSTALL SILT FENCE AND ROCK OUTLETS.
�
D 9. CONTACT THE CITY URBAN FORRESTER TO CONDUCT AN INTERMEDIATE INSPECTION OF THE TREE
PRESERVATION REQUIREMENTS.
/ C 10. ONCE ALL EROSION CONTROL MEASURES ARE INSTALLED AND SEEDED, BEGIN CLEARING AND
-RAMP W NK ENC _ GRUBBING.
a 11. ROUGH GRADING.
12. INSTALL UTILITIES AND INSTALL INLET PROTECTION AROUND ALL STORM INLETS.
13. FINE GRADING.
4' gOX W RE F 14. CONSTRUCT THE BUILDINGS
m- I �� 15. CONSTRUCT THE CONCRETE SIDEWALKS.
16. EROSION CONTROL DEVICES SHALL BE INSTALLED AND DILIGENTLY MAINTAINED THROUGHOUT
CONSTRUCTION. DEVICES SHALL BE INSPECTED AND REPAIRED AFTER EACH SIGNIFICANT RAINFALL.
UP 17. FINAL ADJUSTMENT OF ALL MANHOLES, VALVES AND CLEANOUTS WITH CHECKOUT.
COD I I \ 9' CHAIN LINK FE C .. 18. SEED OR OTHERWISE STABILIZE ALL DENUDED AREAS AS REQUIRED ON THE ATTACHED NEW
FEN E WITH 3 STANDS 0 WIRE STABILIZATION TIME FRAMES SCHEDULE.
I BARB WIRE ( \ = MESH
ICGR
UE � ' I'� � ° FE C� ® 19. INSTALL PUMP AROUND AND SILT SACK FOR POND.
C '. o=��J H �T ' . Gr 2P 1. EXCAVATE USING
MAROUND SACK.
TERIORANDCO CONSTRUCT DAM.NOTES: 22. CONSTRUCT CONCRETE SPILLWAY. 23. STABILIZE POND INTERIOR AND DAM
1. FILTER STRIP AND ASSOCIATED SIDE SLOPES SHALL BE INSTALLED USING 24. REMOVE PUMP AROUND AND ALLOW FLOW BACK INTO POND ONLY AFTER INSPECTION BY THE
CENTIPEDE OR COMMON BERMUDA SOD GROWN IN NON -CLAYEY SOILS OR ENGINEER.
WASHED. 25. ALL EROSION CONTROL DEVICES ARE TO REMAIN IN PLACE UNTIL SITE IS PROPERLY STABILIZED
2. IF REQUIRED BY THE ENGINEER, THE UPPER 12" OF SOIL IN THE FILTER STRIP WITH GROUND COVER AND EROSION CONTROL OFFICE HAS ISSUED APPROVAL TO REMOVE. ALL
UPSTREAM AREAS MUST BE STABILIZED PRIOR TO REMOVAL OF EROSION CONTROL DEVICES. ONCE
WILL BE AMENDED AT THE ENGINEERS DIRECTION TO PROMOTE PLANT GROWTH. THIS OCCURS, REMOVE SEDIMENT, GRADE TO FINAL ELEVATIONS AND STABILIZE.
3. SOIL SHALL BE TEMPORARILY STABILIZED UNTIL PERMANENT VEGETATION IS 26. SEDIMENT TRAP 2 SHALL BE CONVERTED INTO A LEVEL SPREADER PER THE LEVEL SPREADER
ESTABLISHED. DETAIL. THE LEVEL SPREADER SHALL RUN THE FULL WIDTH OF THE SEDIMENT TRAP.
y� 4. THE LIP OF THE CONCRETE LEVEL SPREADER SHALL BE AT A UNIFORM 27. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL SITE EROSION CONTROL MAINTENANCE DURING
2x / CONSTRUCTION. IN ADDITION, THE CONTRACTOR SHALL BE RESPONSIBLE FOR KEEPING AL
k ELEVATION WITH A CONSTRUCTION TOLERANCE OF PLUS OR MINUS 0.25 INCH ITEMS/RECORDS REQUIRED BY THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
SS S AT ANY POINT ALONG ITS LENGTH. PERMIT.
SS S 6. THE TOP OF #57 STONE TRANSITION ZONE SHALL BE 1" BELOW THE LIP OF 28. THE CONTRACTOR SHALL HAVE ON SITE THE MEANS TO REMOVE ANY SEDIMENT TRACKED ONTO
°- J THE CONCRETE LEVEL SPREADER. THE STREET. IF CONDITIONS REQUIRE, EQUIPMENT MUST BE ON SITE TO WASH TIRES OF VEHICLES
_ 7. ACCESS FOR MAINTENANCE AND INSPECTION SHALL BE COORDINATED WITH THE PRIOR TO ENTERING STREET.29. FINAL CLEAN UP.
�- OWNER AND GREENSBORO SCIENCE CENTER STAFF. 30. CHECKOUT BY DEVELOPER AND THEIR ENGINEER.
25.0 / 1" DROP FROM EROSION CONTROL LEGEND
CONCRETE TO STONE
3000 PSI CONCRETE TEMPORARY SILT FENCE SF SF
FIL�TESR DSTRfFx F �� \ s. 2• 30, ROCK OUTLET FOR SILT FENCE
826.70 < x SOD FILTER STRIP
\ FF (1% SLOPE) TREE PROTECTION FENCE TCA TCA
FILTER FABRIC
825.00 I LIMIT OF DISTURBANCE / 3 #57 STONE 2.5' DEEP BLOCK & GRAVEL INLET PROTECTION
• < F / �. �
/ I CLASS-1 RIPRAP CON TTDCTION AENTRANCE
827.00 �� J
� LEVEL SPREADER DETAIL
OHM
826.70 \ / I WIRE &STONE INLET PROTECTION
LEVEL SPREADER PLAN VIEW
N TS
GRAPHIC SCALE
50 0 25 50 100
1 inch = 50 fL
LQ E
v
M C L
ORMAN cV et
�D Q ROAD t t, t� N N 0 M V
w �ti�
T_
SITE � � E � � IR M
J G z` E C!ij M M N
v W 'a
_ V (�
Z r,
[r 555
lF
G',QoG�o CN�ROH
gLF'1'Gl, P\SGPPN
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f*••es**Zito %
*
1.00
+� SEAL L"
83)A 31' 1
* GINS a G'i
•. ,y ,` i
VICINITY MAP (1 "=2000')
SITE INFORMATION
EX. ZONING PNR
CURRENT LANDUSE SCIENCE CENTER
PROP. LANDUSE SCIENCE CENTER
TAX MAP NUMBER 00-06-0350-0-0767-SE005
DEED REFERENCE D.B. 002421 PG. 00650
PLAT REFERENCE
TOTAL AREA 343.57 AC
WATERSHED WS-111
AVERAGE SLOPE 2.15 % (OF DEVELOPED AREA)
DISTANCE TO
NEAREST FEMA 200' WEST OF NW CORNER
FLOOD PLAIN
SOILS CeB2, CcC, CcB, MoE
EX. GROSS 108, 356 SF
FLOOR AREA
PROP. GROSS .44 o
FLOOR AREA 15,979 SF (123,200 SF TOTAL)
ACREAGE PERCENTAGE y
DISTURBED 5.51 AC 1.60% v
UNDISTURBED 338.06 AC 98.40% \ tah
EX. BUA 10.441 AC 3.03 % 161ft •► wewt
■\
DEMOED BUA 0.37 AC 0.11 % � - N
oWPROP BUA 1.80 AC 0.52% Z
TOTAL BUA 11.871 AC 3.45% O _ Lw
EX. PERVIOUS 333.46 AC 96.96 %
PROP. PERVIOUS -1.43 AC -0.42% �y o
TOTAL PERVIOUS 331.70 AC 96.55% !mow
v
PARKING INFORMATION W
TOTAL 1 SPACE PER 400 SF (INTERIOR PUBLIC SPACE) _
SPACES 65,300 SF *(1/400 SF) =. 164 SPACES REQUIRED
11 H.C. SPACES REQUIRED, 15 H.C. SPACES PROVIDED
5 2 VAN SPACES REQUIRED
OWNER INFORMATfON
OWNER: DEVELOPER:
CITY OF GREENSBORO GREENSBORO SCIENCE CENTER
PO BOX 3136 4301 LAWNDALE DR.
GREENSBORO, NC 27402 GREENSBORO, NC 27455
336-373-2489 CONTACT:GLENN DOBROGOSZ
PHONE: [phone]
EMAIL: GDOBROGOSZOGREENSBOROSCIENCE.ORG ® 10/21/19 EC Revisions
9/30/19 Rev EC (Spoil)Rev EC (Spoil)
LEGEND
A 9 22 19 Rev EC (Spoil)
1 8/22/19 Addendum 3
}( NAIL SET/FOUND Line Legend Mk Date Description
IRON PIPE FOUND g
IRON PIPE SET SANITARY SEWER LINE (SIZEdoTYP_E A_S _ _ NOTED) _ Revisions
* NC DOT RIGHT-OF-WAY DISC OVERHEAD UTILITY 01OY pl.rylr
8 UTILITY POLE
UTILITY POLE TREE PROTECTION FENCE TCA TCA
GUY WARE TREELINE
SANITARY SEWER MANHOLE WATERLINE W O
-� SIGN DMUE LINE . - . - .
OO WATER METER TREE PROTECTION LINE
FIRE HYDRANT PERM. EARTH BERM PEB PEB
© GAS VALVE PC 449
ie2t4 SPOT ELEVATION LQ
N/F NOW OR FORMERLY
E/P EDGE OF PAVEMENT
DIP DUCTILE IRON PIPE Q O
WCR WHEELCHAIR RAMP Ce
WESTCOTT, SMALL & ASSOCIATES, PLLC
125 SOUTH ELM STREET, SUITE 606
GREENSBORO, NC 27401
WWW.WSAAENG.COM
PHONE: [phone]
DESIGNED BY: MICHAEL WESTCOTT [e-mail]
REVIEWED BY: TORI SMALL [e-mail]
JOB NO.: E-1351.1
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Date 08-22-2019
Drawn By mbw
Check By vws
Job No. 17-093
Sheet

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TOP: 859.41'
15" RCP ® -1.11 %` STP-504 24.05 LF (VALVE ON 24" DIP) D D {
INV IN: 837.89
m
j 15" RCP ® -4.45% _ OHUI
STP-505 30.00 LF INV OUT: 37.61 --` S---
_ 15" RCP 0-6.49% INV IN: 842.78 - - _ - - --- - _�- IKG
CMNF / INV OUT: 841.71 8 2 �_ -� ' �}�U "ENTRANCE"'FR
CO8s = -1 -� $58 W - -- S SM E OF
ONPS - INV IN: 835.35 _ �\�-�--� 0KC7-=� tU� 8ss W - w
ICMNF a i TI III � 18"RCP STP 502 39.01 LF - - 5 _�- U _emu W W W BRICK WAL �s� o INV OUT: 833.40 _ �,U ----- _
N _ _OHU' �� \ W W W WOAD SIC . OUND WELL a {
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W - - 12 `ft P`- m SI ISE OF
` TOP: 817.81' - IO W D PL S wv
- - TOP: 54.99'
UNDE GROUND I I I � �30� � � - $3�-c F4l_) � � 24" wA MIN � ------ W �- - - -_-- "ENTRANC
/ ELECTRICAL VAULT ° ���AFif� �� N �j W - cr - - TOP: 854.47' a ��/°
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°I W w „Fu z. t EADING TO • " s sz.o3 -Fc
$45 ROOF y w-c 2e Row-
a
I -
GKA E INLET ��� \ w 0 65.13 ROW Ow
\ o "V 8 3 TOP: 840.23'-� RS s �P 8 I /
S ,
o \ 843 ELEV'r P \ -
C
C ° - o`d \ INV.: 839.51� E pq p �� CLF 853 wv
r \.•;x j 2 GKHC� INLET/ 12"RCP WALK 16' CL Q Q p4
j
I I Q ¢ I \ 1 \ TOP: 839.52-a INV.: 842.57' _ E ANH E
\ of o '.I az, , l \ pf c �l, 8a 37 74' 2"RCP �6' W D FENCr SSUMP INSID \� '6' '`'VC 15 03 a FLUME
Qem\ ; \. .,
y \ TOP: 85P 45'
I LETo CABLE MOST N
INV(6
a s
ROCK
S
1 •
d s � RAIL FENCE
R
�
Q, _\ \ a a E ��' \ \ oGRATE INLET�� so
1 I W !: ri R�E� -`- \ 8 �_� a L�`i- ✓ \ \ (16"x16
'� �J• & \ TOP, Y
_ �-8 �/ - aap \3' POST ANDS POLE
R +,� � /✓ / / 8 82 .70 . '. -_ - - - \ l • �,�� �� �' \ .• _ CHAIN FENCm m
I W 2p 2� 825:
835 8 5 Q s• �GI S ro 865
30' CLAY
yn=\ Q� NV�,8 3 ST\�
TOW: 24� � �P�
\R1� C N DRAINAGE- - A�
��/�30" CLPIPE
I I
I �Op
82, \ %-� / ` 3' LIT RAIL FENCE
�� n
/ / 8�� f'q�
➢
' ' , CD -- i .--� �8ao3-20� a �__ ��%�/�• ���---' a r as:r�ai/�/5° �P:Pu/ 4�gs/ o �� �\\� I
III{IIIII
0
BRO3' SPLIT ocm
ONZ ��CPP RAIL FENCE r S nTOP. 846-
DECORATIVE WALL 00
_
D
{{ �� / 4 SPLIT., e. - 'ZQ T Q �. s_. 8g5- R
/II3
Os \ 8"RCP FL/ ARED END x 7 INb.: \ 56 ` c I �
\ NV.: 817.66' T 835 Q SECTION 3' SPLIT ��Ili « RC BQ
\ / \ x a V.: 844.59' cc RAIL FENCE m « 4 R LL
BOLL ARD WITH 85 l S� �X CURB INLET
a \ SCU B L
E\ECTRICAL SWITCH ca / _� a � l TO 8�6.45 TOP: 866.61'
}� \ N5�
NV. IN(E): 863.01
EYPF>\D C% A POST L d P� ST � /'" Q � r( Q - �a x I IN IN(E): 8
I k FLARE END s V. c )
\ EL�s R�CAL PAD I a a \� ( YARD INLET \ RAIL PFEE NV. OUT W : 858.
�l s \S CTINO NV. OUT(W):
(� UNDERGR�1nF�"' o� I� / i
s v-VAULT `' I / ° INV.: 848.59' STONE WALL INV.: $55.41' I S
CAGE / cv INV. OUT: 844.91' 24"RCP \
INV.: 841.50'
�- � _�:: c•„�;.� I I / ,�a ; �. � �_p Al IN FEfg„PVC J `
3' SPLIT'CD
E� OK AS HAT -. I 0 E RAIL FEN
CT a 1. NV.: 854.31 . �O
CHAIN LINK F N E
1 Imo. �rooDl - - a`°Xx -)l 1
I FEN E ° I I a 12" T���N
847.84'
GUARDRAIL
2,
as
° E/ HtI10
pff
10
r O ro O C
C /0 V.: 85
NC o
fj I I m D FENCEQ
CHAIN LINfs',
RAMP SMH 1 1 1 v FENCE
STATUE / co I I -10
iip BBOX wvR �FNCE '
a
LINKo � w`2 1 OOD 9' CHAIN FE C P GI' 0 UP
FEN E r �I I \ WITH 3 STANDS 0 / /' oil WIRE
GR E O I I ' o� BARB WIRE MESH
MESHF wv
CU Z '� ro / v FE HELT C
(I E ;C. a OoO��J cpTDc� I x/VQ'
I �EXE CIE R
I � I l-N..... •. , v / �/�g� /� �°�•����T2!�, i ° �
ro 11
° ..C"5+ H G
T 1 / `METAL I ) a< Q a I \ yL GRATE INLET SIG I FL \D\EN\D oG \T P: 862.61'
TIMBER a / CTIO _ SF -A I -T
WAj_L� INV.: 16' © , T P. 86 .^
1 V. IN: 85 .
ENCH 4' SPR/I�T o I!V OUT: t�5x6,,
/ CHJN
L4' EP T ^FETE
WOO
4' D ANDFI 3' WO D
GLATSS , FNCE I % FENCE
ORAL ATE INLE
f J E I P: 865.41
m R'A BI
INV. IN: 861.5'
ING
1 I I OUT: QG ��
B ILD15"R�P
i® TOP: 1 865.5
. . � ° . I a. cy, . IN: 861.9
r I I OUT:15 RCP
828
MATCHLINE SHEET 1 �aW-- I I I _ ' CHAIN LINK FENCE " cO $e6.
MATCHLINE SHEET 2 I \ d WITH 3 STANDS OF 7 WOOD
.y. LL U I I I Q 1 ARB,WIRE N J FFNGEBA,'\
1 ANIMAL HUSE
BUILDINq_
0 6
CURB INLET � \ \ � � I \ \ \ a a ` � \ I 210
OUT: 825.26'
DWYVH�t ivI vLt , 1 \
l I I \ \ \ I / GRATE I�
TOP: 825.67' N ,° o I� I o I I I � � l � I � 86
INV. IN(N): 822.12' I I I \ 0 1 J \ l
INV. IN(NE): 822.27' l
INV. IN(S): 823.67'
INV. OUT SW : 821.90' l I I i , \
co
TOP: 823.52'
INV. IN(NE): 822.12'
INV. IN(SE): 821.87' +a1s.s I I I CURB INLET 1 I a I Q
INV. OUT(W): 821.77' ' I v ,� TOP: 825.80'
s1s.s ro v l INV. .OUT: 823.
8"PVG /0)
^ I I I a
INV.: 815.87' f p�C 2 D /d
I^ _3' SPLIT
UTILITY NOTES:
1. ALL WORK SHALL BE GOVERNED BY THE LATEST EDITIONS OF THE STATE MECHANICAL,
PLUMBING, ELECTRICAL, FIRE PROTECTION, BUILDING CODE, ENERGY CONSERVATION,
HANDICAPPED ACCESSIBILITY, NATIONAL ELECTRICAL CODES, AND NATIONAL FIRE
PROTECTION ASSOCIATION CODES AND AS ADOPTED BY THE AUTHORITIES HAVING
JURISDICTION.
2. SEE ARCHITECTURAL PLANS FOR DETAILS OF BUILDINGS AND BUILDING DIMENSIONS.
3. OCCUPATIONAL HEALTH AND SAFETY ADMINISTRATION (OSHA) STANDARDS FOR
EXCAVATIONS; FINAL RULE 29CFR PART 1926, SUBPART "P" APPLIES TO ALL
EXCAVATIONS EXCEEDING 5 FEET IN DEPTH.
4. EXCAVATIONS EXCEEDING 20 FEET IN DEPTH REQUIRES THE DESIGN OF A TRENCH
SAFETY SYSTEM DESIGNED BY A REGISTERED PROFESSIONAL ENGINEER.
5. LOCATION OF EXISTING UTILITIES SHOWN ON THESE PLANS ARE APPROXIMATE OR
SCHEMATIC. THE LOCATIONS ARE BASED ON ACTUAL FIELD SURVEYS AND AVAILABLE
RECORDS, CONTRACTOR SHALL FIELD VERIFY LOCATION OF ALL EXISTING UNDERGROUND
UTILITIES AND UNDERGROUND STRUCTURES AND VERIFY REQUIRED COVER AND
CLEARANCES PR10R TO CONSTRUCTION AND REPORT ANY CONFLICTS TO THE ENGINEER.
6. ALL SANITARY SEWER SERVICES SHALL BE SCH. 40 PVC WITH ADHESIVE "WELDED"
JOINTS, UNLESS SPECIFIED OTHERWISE. MINIMUM SLOPES ON SANITARY SEWER
SERVICES. 4- - W PER FOOT, 6" - 1/8" PER FOOT.
7. WATER/WASTE WATER PIPING SHALL BE CONNECTED TO BUILDING STUBS, VERIFY
LOCATIONS PRIOR TO BEGINNING WATER PIPE INSTALLATION.
8. CONTRACTOR SHALL NOTIFY NORTH CAROLINA "ONE CALL" AT 1-800-632-4949 AT
LEAST 48 HOURS PRIOR TO BEGINNING CONSTRUCTION OR EXCAVATION TO HAVE
UTILITIES LOCATED. CONTRACTOR SHALL CONTACT ANY LOCAL UTILITIES THAT PROVIDE
THEIR OWN LOCATOR SERVICES INDEPENDENTLY.
9. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE CITY OF GREENSBORO &
NCDENR PUBLIC UTILITIES AND CROSS CONNECTION CONTROL REGULATIONS AND
STANDARDS.
10. CLEANOUTS SHALL BE PLACED NO MORE THAN 75 FEET APART CLEAN OUTS LOCATED
IN LOAD BEARING AREAS SHALL BE PER COG STD#224.
11. CONNECTION OF SANITARY SEWER SERVICE TO AN EXISTING SEWER LINE SHALL COMPLY
WITH THE CITY OF GREENSBORO STANDARDS. IF PAVEMENT CUT IS REQUIRED,
CONTRACTOR SHALL PATCH PAVEMENT WITH A SECTION TO MATCH EXISTING PAVEMENT.
3" 1-2, 8" ABC OR BETTER.
12. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE LOCATION AND/OR RELOCAT70N OF
ALL EXISTING UTILITIES IN COORDINATION WITH THE APPROPRIATE UTILITY, AGENCY, OR
COMPANY.
13. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO VERIFY THE ACTUAL LOCATION AND
AVAILABILITY OF ALL EXISTING AND PROPOSED UTILITIES IN THE FIELD PRIOR TO GROUND
BREAKING.
14. REFER TO DETAIL SHEET FOR PIPE BEDDING,
15. ALL ON -SITE PRIVATE WATER/SEWER TO BE MAINTAINED BY OWNER.
16. TERMINATE EXIS77NG UNUSED WATER/SEWER TO THE MAIN TO COG STANDARD.
17. METERS, BACKFLOW PREVENTERS AND ENCLOSURES TO BE COG STANDARD.
I& ALL STANDARD NCDENR/COG REQUIRED UTILITY SEPARAT70NS MUST BE PROVIDED.
19. SERVICES THAT TIE INTO MANHOLES MUST DO SO AT THE SHELF UNLESS THE MANHOLE
IS GREATER THAN 10' THEN USE RELINER INSIDE DROP.
20. METERS CAN NOT BE SET UN77L EASEMENTS ARE RECORDED AND PROVIDED TO THE
WATER RESOURCES.
21. THERE IS NOT A FIRE PUMP ASSOCIATED WITH THIS PROJECT.
22. METERS CAN NOT BE LOCATED IN LOAD BEARING AREAS.
23. TAPS ON WATER/SEWER LINES OVER 16" IN DIAMETER MUST BE EXECUTED BY WATER
RESOURCES PERSONNEL. CALL 336-373-2033.
24. NO NEW TREES OR THE PROJECTED MATURE CANOPY ALLOWED W1 THIN 10' OF
EXISTING/PROPOSED WATER AND SEWER.
GRAPHIC SCALE
50 0 25 50 100
1 inch = 50 ft.