SW4090601_APPROVED PLANS_20090923

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW��/%lO�l
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE
�
YYYY DD

1. SEE ARCHITECTURAL PLANS FOR PROPOSED BUILDING DIMENSIONS.
11. THE LIMIT OF DEMOLITION OF EXISTING SITE FEATURES ARE SHOWN APPROXIMATELY.
Q
Z'
THE EXACT LIMIT OF DEMOLITION SHOULD BE FIELD VERIFIED WITH THE OWNER
�Olk
SEE DEMOLITION NOTES REGARDING REMOVAL OF EXISTING SITE FEATURES.
OR HIS REPRESENTATIVE. DEMOLITION OF ITEMS SUCH AS CONCRETE WALKS, CURB
TO .
ALL WWIRINGATER PASNWELL
GENERAPIPING
SHALL BPHO
AND GUTTER ETC. SHOULD EXTEND TO THE EXISTING CONSTRUCTION AND / OR
EUTAND COMMRED
UNI ATIONSOVE
SEWER ANDTELECTRICALOR
EXPANSION JOINT.
AS FOOTINGS AND FOUNDATION WALLS WITHIN BUILDING CONSTRUCTION AREA.
3'
12. ALL EXISTING PIPE UNDER PROPOSED BUILDINGS SHALL BE COMPLETELY REMOVED.
SITE
CONSTRUCTION SHALL OCCUR DURING THE SCHOOL YEAR. THE
CONTRACTOR SHALL BE REQUIRED TO MAINTAIN SAFE PEDESTRIAN
13. DEMOLITION OF EXISTING FEATURES INDICATED SHALL INCLUDE ALL PORTIONS
ACCESS TO EXISTING BUILDINGS.
OF THE STRUCTURE LOCATED BELOW GRADE.
MEIN ST•
4. CONTRACTOR SHALL COORDINATE REMOVAL OF ALL ELECTRICAL
14. THE CONTRACTOR SHALL REMOVE ALL CONSTRUCTION DEMOLITION DEBRIS FROM
POWER POLES WITH POWER COMPANY. ALSO COORDINATE
THE JOB SITE TO AN APPROVED DEMOLITION DEBRIS LANDFILL.
WITH GAS AND PHONE, COMPANIES DURING ALL PHASES OF CONSTRUCTION.
y
15. CONSTRUCTION FENCING SHALL BE LOCKED AFTER CONSTRUCTION ACTIVITIES FOR
5. UNDERGROUND UTILITIES SHOWN ON THIS PLAN WERE TAKEN FROM THE
EACH DAY ARE COMPLETED.
2 C:
BEST AVAILABLE RECORDS AND ARE APPROXIMATE ONLY. THE
kp
CONTRACTOR SHALL BE RESPONSIBLE FOR DAMAGE TO EXISTING
16. MARGINAL TREES SHALL BE TRIMMED AS NECESSARY TO INSURE EXISTING LIMBS
=
%U
UTILITIES. EXPLORE AHEAD OF ALL WORK TO VERIFY UTILITY LOCATIONS.
DO NOT INTERFERE WITH CONSTRUCTION.
RUXTON DR.
THE CONTRACTOR SHALL LOCATE IRRIGATION PIPING, WATER LINES, do 4"
17. THE SMALL LANDSCAPE TREES WITHIN THE DEMOLITION LIMITS SHALL BE REMOVED
FORCE MAIN AND THESE SHALL BE INSPECTED BY SITE ENGINEER PRIOR
BY THE CONTRACTOR AND STORED ON SITE. PLANTS SHALL BE STORED IN A
TO SITE GRADING, UTILITIES DAMAGED DURING CONSTRUCTION SHALL BE
TOPSOIL STOCK PILE AND PERIODICALLY WATERED AND REPLANTED AFTER
9 OLD HOLLOW RID-
REPAIRED IMMEDIATELY BY THE CONTRACTOR AT NO ADDITIONAL COST
COMPLETION AT AREAS DESIGNATED BY THE OWNER.
NC 66
��
TO THE OWNER.
18. CONTRACTOR MUST VERIFY PRIOR TO ABANDONEMENT OR DEMOLITION OF ANY
6. SEE SPECIFICATIONS REGARDING THE SEQUENCING OF VARIOUS
UTILITIES THAT ALL NON —VISIBLE CONNECTIONS TO THESE UTILITIES HAVE SEEN
�Q
DEMOLITION AND BUILDING PHASING DIRECTIVES FOR THE SITE.
TRANSFERRED TO NEW UTILITIES AND ARE COMPLETELY FUNCTIONABLE.
7. EXISTING FEATURES SUCH AS CONCRETE WALKS PAVED DRIVES
19• THE EXACT DEMOLITION LIMIT OF ANY UTILITY SERVICE MUST BE FIELD VERIFIED BY
LOCATION MAP
ETC. WHICH ARE TO REMAIN SHALL BE PROTECTED FROM DAMAGE
THE CONTRACTOR UPON DETERMINATION OF ALL SERVICE ENTRANCES TO BUILDINGS
N.T.S.
DURING CONSTRUCTION. IF DAMAGE OCCURS THESE FEATURES
AND THE SEQUENCE OF CONSTRUCTION IS ESTABLISHED. THE GENERAL INTENT OF
SHALL BE REPAIRED AND/OR REPLACED AT NO ADDITIONAL
THE PROJECT IS TO REMOVE ALL EXISTING UTILITY SERVICES WITHIN THE LIMITS OF
COST TO THE OWNER.
NEW BUILDING CONSTRUCTION. ALSO PROPER COVER ON ALL UTILITY LINES MUST
BE MAINTAINED BASED ON FINAL CONSTRUCTION GRADES.
8. TEMPORARY SAFETY ENCLOSURES, COVERED WALKWAYS AND
BARRICADE WALLS TO BE PROVIDED BY GENERAL CONTRACTOR.
20. ANY EXISTING UTILITY REMOVED FROM SERVICE THAT IS NOT LOCATED UNDER A
FLOOD CERTIFICATION.• THE SUBJECT PROPERTY IS NOT LOCATED IN A SPECIAL
PROPOSED BUILDING, MUST BE PLUGGED.
FLOOD HAZARD AREA AS SCALED FROM MAPS FURNISHED BY HU01' IRM,
g, CONTRACTOR SHALL BE RESPONSIPLE TO INSURE EMERGENCY ACCESS
21. CONTRACTOR TO TAKE SPECIAL CARE THAT SUITABLE TEMPORARY OR PERMANENT
`
VATED (PANEL NOT PRINTED) SUBJECT TO VERIF7CATION BY DETAILED FLOOD
TO ALL PARTS OF THE SITE DURING ALL PHASES OF CONSTRUCTION.
DRAINAGE OR STORM DIVERSIONS ARE IN PLACE PRIOR TO REMOVAL OF ANY
MAP STUDY. SEE COMMUNITY PANEL 37067CD767—H
�
10.IMPROVEMENTS AND EXISTING FEATURES SHOWN ON THIS PLAN ARE CEPICTED
EXISTING STORM DRAINAGE PIPE OR STRUCTURE.
AS FOLLOWS:
ij
ALL EXISTING SITE FEATURES ARE DEPICTED AS DASHED LIGHT
ALL EXISTING SITE FEATURES TO BE REMOVED ARE CROSS HATCH-:E] OR SHOWN
AS A DARK SOLID LINE.
DEMOLITION NOTES
1. CONTRACTOR SHALL COORDINATE REMOVAL OF ALL ELECTRICAL
POWER POLES WITH POWER COMPANY. ALSO COORDINATE WITH
GAS AND PHONE COMPANIES DURING ALL PHASES OF CONSTRUCTION.
2. EXISTING FEATURES WHICH ARE TO REMAIN SHALL BE PROTECTED
FROM DAMAGE DURING CONSTRUCTION. IF DAMAGE OCCURES THESE
FEATURES SHALL BE REPAIRED AND/OR REPLACED AT NO ADDITIONAL
' COST TO TIME OWNER.
3. ALL DEMOLITION MATERIALS MUST BE REMOVED FRON THE JOB SITE
AND DISPOSED OF IN AN APPROVED DEMOLITION DEBRIS LANDFILL.
i
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TBM Fti
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SOUTHERN
FLANGE BOLT ON
FIRE HYDRANT
ELEV=983.20'
(NAVD88) 1
CONCRETE WALL
AROUND GRAVE
DEPOT / h
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« / \ OP LEA . 8 0�'
\ AN14ETTE M_
\ PIN No. 6868-04-
BLOCK 2152 LOT
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SALLIE C. JOHNSON \
NANCY MORETZ JOHNSON
PIN No. 6$68-04-2512.00
BLOCK 2151 LOT A017D I
D6 1591 PG 1102 I
ZONING PB & RS20 JEFF'REY N. SCOTT 966
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0 u TOP ELEVATION OF CLEANOUT=952.10'
I APPROXIMATE INVERT ELEVATION OF
1 CLEANOUT=947.8'
EXIST. 6` 0A WATER LINE,
t EXIST- 2' OJ WATER LINE. g
0 I CITY DRAWING 4p000
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VCP CITY PROD. No. 2268
n ;E MAIN `�oH�
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GENERAL NOTES I S I
a $ rn N O pn
1-THE LOCATION OF ALL UNDERGROUND UTILITIES ARE APPROXIMATE AND WERE TAKEN FROM 6m I o r
RECORDS AND FIELD LOCATIONS PROVIDED BY OTHERS. THE CONTRACTOR SHALL BE *$ I Eo�
RESPONSIBLE FOR VERIFYING THE LOCATION OF ALL UNDERGROUND UTILITIES PRIOR TO THE=A�o m�"'N I X00 o
-J—$ `
t START OF CONSTRUCTION. ' co to
.to ow 00
2.ALL GRADES SHOWN REPRESENT FINAL GRADES WITH NO ADJUSTMENT FOR TOPSOIL, ETC.N° I I0 'o I �$St�
' �I�IIIUI9111111111111111111111elrlll ti A�I`I
r 3.PVBLIC WATER AND SEWER SHALL BE INSTALLED IN ACCORDANCE WITH THE REQUIRENTS OF
THE CITY —COUNTY UTILITIES COMMISSION.
4.SEE ARCHITECTURAL PLANS FOR FOUNDATION, FOOTING AND BUILDING DIMENSIONS.
TBM
RAILROAD SPIKE
SET IN POLE
ELEV=981.70'
(NAVD88)
i
sxruar�
C2
M W HOLDINGS LLC
PIN No. 6868-25-5417.00
BLOCK 5171 LOT 234
08 2644 PG 2472
ZONING RS20
V`-
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KEYSTONE GROUP INC.
PIN No. 6868-22-6450.00
BLOCK 5171 LOT EOOOA
DO PG
ZONING RMB-S
,;a,POLE -4 Guy — p-or-K FENCE LINE
FF WATER VALVE ate... UNDERGROUND PIPING
i GAS ASSEMBLY APPROX WOODS LNE (TRUNK)
TEMP. BENCH MARK G
v� WELL GAS LINE MARKlN GS
-UT—DE— UNDERGROUND LINE MARKINGS
CR WATER METER N — WATER LINE MARING5
LLD CATCH BASIN Q HORIZONTAL CONTROL POINT
(�} DRAINAGE STRUCTURE BORE HOLE
�D SANITARY MANHOLE I
9 CLEANCUT 50PIEC CABLE MARKER
M TELEPHONE PED IF TREES ARE SHOWN, THE TREE SYMBOL HAS REEN
.� FIRE HYDRANT SCALED BASED ON THE TRUNK DIAMETER TO PROVIDE
SIGN — LARGE SIGN A QUICK, GRAPHIC IDEA OF THE SIZE OF THE FREE.
GRAPHIC SCALE YARD INLET W/ GRATE THE SYIA8OLS DO NOT DEPICT DRIP LINE OR CANOPY
r[pJ YARD INLET W/ CONC CAP OF INDIVIDUAL TREES.
100 50 O 100 200 HANDICAPPED SPACE NOT[ - ANY UNDERGROUND LINES SHOWN ARE
BASED ON SURFACE EVIDENCE. THIS SURVEYOR
d PINE TREE, SIZE NOTED CANNOT CERTIFY TO LOCATION OF NON -VISIBLE
STRUCTURES. IF UNDERGROUND LOCATION IS
MATCH LINE SEE THIS SHEET FOR CONTINUATION Z ELECTRIC APPARATUS CRITICAL, THE LINE SHOULD BE EXPOSED AND
1" = 100 FEET AND VERIFIED. THIS SURVEYOR CANNOT ACCEPT
LIABILITY FOR UNDERGROUND STRUCTURE LOCATIDrJ.
Suite 301 530 North Trade Street
Winston-Salem, NC 27101
Telephone [phone]
Fax [phone]
DAV&MARTIN-POWEil & ASSOC., INC.
ENGINEING-HAND PLANNING -SURVEYING
6415 OLD PLANK ROAD
HIGH POINT, NORTH CAROLINA 27266
PHONE (336)886-AMI FAX [phone]
LICENSE: F-0245
DMP PROJECT # 000139
*t�4�FSSCFFIR? JY
41 �A fd�I
(� e
SEAL 1=
033880. €.
V i
v
fRrllir51 F1ie
Project:
WALKERTOWN HIGH SCHOOL
FORSYTH COUNTY
Sheet Title:
EXISTING SITE DRAINAGE
PLAN
Issue Date:
JU N E 5, 2009
Revisions:
8.4.09 PER STORMWATER REV.
StMnw8ter Permit DIDeuments
Catstruchon in arc +a r
required` nts L5
rules rr
Imp
ecl
plans anct SPecs an 1 4er,Ly _l n}tJ'with4ihet`I the
Storrnwatar rules. (15A Nt„t(:,<ii . +OUt;(j})
Ptlrrrtit # S 7 bate &12 09
by NC 6wision of Water QuaMy
Sheet`' Revision Date S. �I• °?
. - •f k: FJ Fs .
I
,�tlntii,,r S�+rn;
Rpy;cnal Of!1te
Project Plumber:
oao - oao
Sheet Number:
6; w t*1 f= am
As W Uuments of service these dra ''oga and the desip represent-
ed ere the property of Walter PA CatleLnn A Piam Architects.
PA. Reproduction, or use of these drawings aLber Than for Lbe
project intended without mitten aonaent from the architect is pro-
hibited. Unauthorised use w& be sabjeei to legal action.

1. SEE ARCHITECTURAL PLANS FOR PROPOSED BUILDING DIMENSIONS.
FLfl� 2' SEE DEMOLITION NOTES REGARDING REMOVAL OF EXISTING SITE FEATURES.
O GENERAL CONTRACTOR SHALL BE REQUIRED TO REMOVE ALL WATER PIPING,
SEWER PIPING ELECTRICAL PHONE AND�yyWRING AS
\APNZ AS FOOTINGS A DD FOUNDATION WALLS WITHIN OBUILDINGA TIONS CONSTRUCTION AREAI.L
5
SITE 3. CONSTRUCTION SHALL OCCUR DURING THE SCHOOL YEAR. THE
CONTRACTOR SHALL BE REQUIRED TO MAINTAIN SAFE PEDESTRIAN
ACCESS TO EXISTING BUILDINGS.
IyEW 5T 4. CONTRACTOR SHALL COORDINATE REMOVAL OF ALL ELECTRICAL
POWER POLES WITH POWER COMPANY. ALSO COORDINATE
WITH GAS AND PHONE COMPANIES DURING ALL PHASES OF CONSTRUCTION.
-7 Z 5. UNDERGROUND UTILITIES SHOWN ON THIS PLAN WERE TAKEN FROM THE
2 y C: BEST AVAILABLE RECORDS AND ARE APPROXIMATE ONLY. THE
CONTRACTOR SHALL BE RESPONSIBLE FOR DAMAGE TO EXISTING
RUXTON DR. UTILITIES. EXPLORE AHEAD OF ALL WORK TO VERIFY UTILITY LOCATIONS.
THE CONTRACTOR SHALL LOCATE IRRIGATION PIPING, WATER LINES, do 4
J` FORCE MAIN AND THESE SHALL BE INSPECTED BY SITE ENGINEER PRIOR
TO SITE GRADING. UTILITIES DAMAGED DURING CONSTRUCTION SHALL BE
g OLD HOLLOW RD. REPAIRED IMMEDIATELY BY THE CONTRACTOR AT NO ADDITIONAL COST
p NC 66 TO THE OWNER.
6. SEE SPECIFICATIONS REGARDING THE SEQUENCING OF VARIOUS
DEMOLITION AND BUILDING PHASING DIRECTIVES FOR THE SITE.
7. EXISTING FEATURES SUCH AS CONCRETE WALKS PAVED DRIVES
LOCATION MAP ETC. WHICH ARE TO REMAIN SHALL BE PROTECTED FROM DAMAGE
N.T.S. DURING CONSTRUCTION. IF DAMAGE OCCURS THESE FEATURES
SHALL BE REPAIRED AND/OR REPLACED AT NO ADDITIONAL
COST TO THE OWNER.
S. TEMPORARY SAFETY ENCLOSURES, COVERED WALKWAYS AND
FLOOD CER77FICA770N.• THE SUBECT PROPERTY IS NOT LOCATED IN A SPECIAL BARRICADE WALLS TO BE PROVIDED BY GENERAL CONTRACTOR.
FLOOD HAZARD AREA AS SCALED FROM MAPS FURNISHED BY HUD/FIRM, 9, CONTRACTOR SHALL BE RESPONSIBLE TO INSURE EMERGENCY ACCESS
DA TED (PA#VEL NOT PR/N7FD) SU& CT TO VERIRCA77ON BY DETAILED FLOOD TO ALL PARTS OF THE SITE DURING ALL PHASES OF CONSTRUCTION.
MAP S77JDY. SEE COMMUNITY PANEL hf 37067CO167-H 10. IMPROVEMENTS AND EXISTING FEATURES SHOWN ON THIS PLAN ARE DEPICTED
AS FOLLOWS:
ALL EXISTING SITE FEATURES ARE DEPICTED AS DASHED LIGHT LINES.
ALL EXISTING SITE FEATURES TO BE REMOVED ARE CROSS HATCHED OR SHOWN
AS A DARK SOLID LINE.
DEMOLITION NOTES
1. CONTRACTOR SHALL COORDINATE REMOVAL OF ALL ELECTRICAL
POWER POLES WITH POWER COMPANY. ALSO COORDINATE WITH
GAS AND PHONE COMPANIES DURING ALL PHASES OF CONSTRUCTION.
2. EXISTING FEATURES WHICH ARE TO REMAIN SHALL BE PROTECTED
FROM DAMAGE DURING CONSTRUCTION. IF DAMAGE OCURES THESE
FEATURES SHALL BE REPAIRED AND/OR REPLACED AT NO ADDITIONAL
COST TO THE OWNER.
3. ALL DEMOLITION MATERIALS MUST BE REMOVED FRON THE JOB SITE
AND DISPOSED OF IN AN APPROVED DEMOLITION DEBRIS LANDFILL_
DRAINAGE AREAS
DA 1 = 42.03 AC
EXISTING IMPERVIOUS = 0.00 AC
PROPOSED IMPERVIOUS = 19.94 AC
% IMPERVIOUS = 47.4 %
RATIONAL C FACTOR PRE 0.4
RATIONAL C FACTOR POS) 0.79
DRAINAGE AREAS
DA2= 12.8AC
EXISTING IMPERVIOUS = 0.00 AC
PROPOSED IMPERVIOUS = 0.97 AC
% IMPERVIOUS = 7.58rPP-RE
RATIONAL C FACTOR }0.4
RATIONAL C FACTOR OSTi 0.44
DRAINAGE AREAS
DA3=34.6AC
EXISTING IMPERVIOUS = 7.32 AC
PROPOSED IMPERVIOUS = 0.32 AC
% IMPERVIOUS = 22.0rFRRE)
RATIONAL C FACTOR 0.59
RATIONAL C FACTOR OS) 0.60
DRAINAGE AREAS
DA4=30.9AC
EXISTING IMPERVIOUS = 5.80 AC
PROPOSED IMPERVIOUS = 1.29 AC
RITLIOUS029RAONAAR PEL 0.58
RATIONAL C FACTOR POST) 0.60
OPT
\ ANNETTE M. L
PIN No, 6868-04-
\ BLOCK2152 LOT
08C
ZONING RS20
11. THE LIMIT OF DEMOLITION OF EXISTING SITE FEATURES ARE SHOWN APPROXIMATELY.
THE EXACT LIMIT OF DEMOLITION SHOULD BE FIELD VERIFIED WITH THE OWNER
OR HIS REPRESENTATIVE. DEMOLITION OF ITEMS SUCH AS CONCRETE WALKS, CURB
AND GUTTER ETC. SHOULD EXTEND TO THE EXISTING CONSTRUCTION AND / OR
EXPANSION JOINT.
12. ALL EXISTING PIPE UNDER PROPOSED BUILDINGS SHALL BE COMPLETELY REMOVED.
13. DEMOLITION OF EXISTING FEATURES INDICATED SHALL INCLUDE ALL PORTIONS
OF THE STRUCTURE LOCATED BELOW GRADE.
14. THE CONTRACTOR SHALL REMOVE ALL CONSTRUCTION DEMOLITION DEBRIE FROM
THE JOB SITE TO AN APPROVED DEMOLITION DEBRIS LANDFILL.
15. CONSTRUCTION FENCING SHALL BE LOCKED AFTER CONSTRUCTION ACTIVITIES FOR
EACH DAY ARE COMPLETED.
16. MARGINAL TREES SHALL BE TRIMMED AS NECESSARY TO INSURE EXISTING LIMBS
DO NOT INTERFERE WITH CONSTRUCTION.
17. THE SMALL LANDSCAPE TREES WITHIN THE DEMOLITION LIMITS SHALL BE REMOVED
BY THE CONTRACTOR AND STORED ON SITE. PLANTS SHALL BE STORED IN A
TOPSOIL STOCK PILE AND PERIODICALLY WATERED AND REPLANTED AFTER
COMPLETION AT AREAS DESIGNATED BY THE OWNER.
18. CONTRACTOR MUST VERIFY PRIOR TO ASANDONEMENT OR DEMOLITION OF ANY
UTILITIES THAT ALL NON -VISIBLE CONNECTIONS TO THESE UTILITIES HAVE BEEN
TRANSFERRED TO NEW UTILITIES AND ARE COMPLETELY FUNCTIONABLE.
19. THE EXACT DEMOLITION LIMIT OF ANY UTILITY SERVICE MUST BE FIELD VERIFIED BY
THE CONTRACTOR UPON DETERMINATION OF ALL SERVICE ENTRANCES TO BUILDINGS
AND THE SEQUENCE OF CONSTRUCTION IS ESTABLISHED. THE GENERAL INTENT OF
THE PROJECT IS TO REMOVE ALL EXISTING UTILITY SERVICES WITHIN THE LIMITS OF
NEW BUILDING CONSTRUCTION. ALSO PROPER COVER ON ALL UTILITY LINES MUST
BE MAINTAINED BASED ON FINAL CONSTRUCTION GRADES.
20. ANY EXISTING UTILITY REMOVED FROM SERVICE THAT IS NOT LOCATED UNDER A
PROPOSED BUILDING, MUST BE PLUGGED.
21. CONTRACTOR TO TAKE SPECIAL CARE THAT SUITABLE TEMPORARY OR PERMANENT
DRAINAGE OR STORM DIVERSIONS ARE IN PLACE PRIOR TO REMOVAL OF ANY
EXISTING STORM DRAINAGE PIPE OR STRUCTURE.
TBM
q,-
0 'P
SOUTHERN
f 0-
FLANGE BOLT ON
FIRE HYDRANT
�a9�
ELEV=983.20'
c'o
(NAVD88)
C
CONCRETE WALL
AROUND GRAVE
DEPOT ST.",
SALLIE C. JOHNSON
NANCY MORETZ JOHNSON
PIN No_ 6868--04-2512.00
BLOCK 2151 LOT A017D +
06 1591 PG 1102 I
ZONING PB & RS20 + JEffREY
I 6ESA N. SCOTTTT 956�
868 64-6 36 ()4
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HESTER
DONA HESTER
1 No. 6868-04-6127.00
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CLEANOUT=947.8'
EXIST. 6" D. WATER LINE.
EXIST, 2" D.1 WATER LINE.
+ CITY DRAWING 4a000--98
r- A a r- t A-,n- -`
1,Jd
RAILROAD SPIKE
SET IN POLE
ELEV=981.70'
(NAVD88)
�e
mimnwv
MATCH LINE SEE THIS SHEET FOR CONTINUATION
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POST -DEVELOPMENT DR A, �` s c p / I �� f �+N RANC
/ PIN No. 68
1,510,285.67 SF = 34.6 11 °� �D f �l DBE 51P
ICA�1eN M EXISTING IMPERVIOUS ARE , = \ `SF - 5. AC ` / /' / ZONING RS
/;
OF WAYTo-cC�tTr LEPt+ar�e---� , \µ PROPOSED IMPERVIOUS = 85 �0.32
COMP Y (DB`zsm-W, a2�ss 1. ; % TOTAL IMPERVIOUS
�` �',� °� / T/ DEVEI OPMEN DRAT +NsraN=�A PIN No.
sF _ 30.9 AC 6e6s
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PIN No. 6868-13-.
BLOCK 171 L
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a GENERAL NOTES-
1.THE LOCATION OF ALL UNDERGROUND UTILITIES ARE APPROXIMATE AND WERE TAKEN FROM S + W,w, +
RECORDS AND FIELD LOCATIONS PROVIDED BY OTHERS. THE CONTRACTOR SHALL BE I oho (oar
RESPONSIBLE FOR VERIFYING THE LOCATION OF ALL UNDERGROUND UTILITIES PRIOR TO TH c> I Ono xm��CNI
o
J START OF CONSTRUCTION. S I
g 2.ALL GRADES SHOWN REPRESENT FINAL GRADES WITH NO ADJUSTMENT FOR TOPSOIL, ETC. eras
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3.PUBLIC WATER AND SEWER SHALL BE INSTALLED IN ACCORDANCE WITH THE REOUIRMENTS OF
THE CITY -COUNTY UTILITIES COMMISSION. MATCH LINE SEE THIS SHEET FOR CONTINUATION
4.SEE ARCHITECTURAL PLANS FOR FOUNDATION, FOOTING AND BUILDING DIMENSIONS.
99 7�
,
11,11 PIN No. BLOCK 5171 S
LOT
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PIN No. 171 LOT
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KEYSTONE GROUP INC.
PIN No. 6868-22-6450.00
BLOCK 5171 LOT E000A
DS PG
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GRAPHIC SCALE
100 50 0 100 200
1" = 100 FEET
LEGEND OF
STANDARD SYMBOLS
fy7
LIGHT POLE
4
FLOOOLIGHT
--OH-Or-OE- OVERHEAD UTIUTY LINE
10.E
PULE -3 GUY
-0-pr-x -- FENCE LINE
Yf
WATER VALVE
UNDERGROUND PIPING
FSZi
GAS ASSEMBLY
����� APPROX WOODS LINE (FRUNK)
TEMP. BENCH MARK
G - GAS LINE MARKINGS
®
WELL
-UT_UE- UNDERGROUND LINE MARKINGS
IND
WATER METER
- W- WATER LINE MARKINGS
La
CATCH BASIN
HORIZONTAL CONTROL POINT
0
DRAINAGE STRUCTURE
8" BORE HOLE
d
0
SA.NlTARY MANHOLE
CLEANDUT
© BURIED CABLE MARKER
M
TELEPHONE FED
IF TREES ARE SHOWN, THE TREE SYM60L HAS BEEN
A
FIRE HYDRANT
SCALED BASED ON THE TRUNK DLAMEFER TO PROVIDE
SIGN - LARGE SIGN
A QUICK, GRAPHIC IDEA OF THE SIZE Or THE TREE.
ER
YARD INLET W/ GRATE
THE SYW80LS 00 NOT DEPICT DRIP LINE OR CANOPY
v
YARD INLET w/ CONC CAP
OF INONIDUAL TREES.
HANi71CAPPEO SPACE
NOTE - ANY UNDERGROUND LINES SHOWN ARE
BASED ON SURFACE EVIDENCE, THTS SURVEYOR
PINE TREE, SfZE NOTED
CANNOT CERTIFY 70 LOCATION OF NON -VISIBLE
STRUCTURES. IF UNDERGROUND LOCATION IS
®
ELECTRIC APPARATUS
CRITICAL, THE LINE SHOULD BE EXPOSED AND
AND VERIFIED. THIS SURVEYOR CANNOT ACCEPT
LIABILITY FOR UNDERGROUND STRUCTURE LOCATION.
Suite 301 530 North Trade Street
Winston-Salem, NC 27101
Telephone [phone]
Fax [phone]
DAMS-MAON-POWELL & AS=., INC.
PL.AWING-4SUR1/IEYM
6415 OLD PLANK ROAD
HIGH POINT, NORTH CAML14A 27266
PHONE [phone] FAX [phone]
LICENSE: F43245
DMP PROJECT # 000139
CA
4
SEAL r
033880
', v NG f N E{�•'r -.� .�
�frrtrert+tf
Project:
WALKERTOWN HIGH SCHOOL
FORSYTH COUNTY
Sheet Title:
POST DEVELOPMLNT DRAINAGE
PLAN
Issue Date:
JUNE 5, 2009
Revisions:
8.4.09 PER STORMWATER REV.
APproved StOfmwater Permit Documents
Construction in accordance w?-1 these documents I3
r8qulred by the stormwaier permit North Carolina
Lulea require that the stormwater system designer
IPlans and "SP I during cconntruction, certify conformity with tf►8
BtOrrnwater rules. 15A N C r `L"' liacc" wi111 the
( LA[:zIr 1i108(t))
b'ermtt#4?_ o --- Date $.I ,07
Bh"t * sw -��- NC Division of Water Quaky3
?'' Revision Date Quaky
Project Number:
OOO - ODD
Sheet Number:
As Ws4uments of wr► m these dnawuo and the design represent-
ed are the propeet7 of fetter Bobby Callahap 8 Plerre ►nehitecLs,
PL Reproduction or use or these drawings other than for the
pratset mt�ded without written owmt front the mvbaect is pm-
hihita tlaeutborixed use wiR be subject to W& aetien.

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GENERAL NOES
DRNE
I.THE LOCATION OF ALL UNDERGROUND UTILITIES ARE APPROXIMATE AND WERE TAKEN FROM s // -� � � RUXTON
�aLE �` f g 99q.��� { 1 p �C
j / RhE�S q67 I l�\1 `RECORDS AND FIELD LOCATIONS PROVIDED BY OTHERS. THE CONTRACTOR SHALL BE �-� DNA g� I 1
i RESPONSIBLE FOR VERIFYING THE LOCATION OF ALL UNDERGROUND UTILITIES PRIOR TO THE DRIV
START OF CONSTRUCTION. \ / E \ ` 2 0 O
2.ALL GRADES SHOWN REPRESENT FINAL GRADES WITH NO ADJUSTMENT FOR TOPSOIL, ETC. SR 2005
Q 5
SIR
3.PUBLIC WATER AND SEWER SHALL BE INSTALLED IN ACCORDANCE WITH THE REQUIRMENTS OF J'\\ R
THE CITY -COUNTY UTILITIES COMMISSION. s \ ` \ pUBL
�
�� _ 0 PU13LIC �o
4.SEE ARCHITECTURAL PLANS FOR FOUNDATION, FOOTING AND BUILDING DIMENSIONS. R AN ` \ Y
3
GRAPHIC SCALE
60 30 0 60 120
1" = 60 FEET
LEGEND OF STANDARD SYMBOLS
0
L1GHT POLE
(
FLOODLIGHT
—OH-or--0E— OVERHEAD UTILITY LINE
`a,
POLE Q GUY
---q--or--x FENCE LINE
H
WATER VALVE
UNDERGROUND PIPING
E8
GAS ASSEMBLY
t,LA APPROX WOODS LINE (TRUNK)
�
TEMP. BENCH MARK
0 """-" GAS LINE MARKINGS
WELL
-UT— UE— UNDERGROUND LINE MARKINGS
IN)
WATER METER
W -- WATER LINE MARKINGS
M
CATCI BASIN
Q HORIZONTAL CONTROL POINT
!DRAINAGE STRUCTURE
GORE HOLE
©
SANITARY MANHOLE
®
CLEANOUT
© BURIED CABLE MARKER
j
TELEPHONE PED
!F TREES ARE SHOWN, THE TREE SYMBOL HAS BEEN
PRE HYDRANT
SCALED BASED ON THE TRUNK DIAIUETER TO PROVIDE
SIGN �a LARGE SIGN
a 4UICK, GRAPHfC IDEA OF THE SIZE OF THE TRff.
®
YARD INLET W/ GRATE
THE SYMBOLS DO NOT DEPICT DRIP LINE OR CANOPY
YARD INLET W/ CONG CAP
OF INOIVIDUAL TREE5.
NOTE - ANY UNDERGROUND LINES SHOWN ARE
HANDICAPPED SPACE
BASED ON SURFACE EVIDENCE. THIS SURVEYOR
PINE TREE, SIZE NOTED
CANNOT CERTIFY TO LOCATION OF NON-VISI8LE
o
STRUCTURES. IF UNDERGROUND LOCA71ON IS
®
ELECTRIC APPARATUS
CRITICAL, Trf£ LINE SHOULD BE EXPOSED AND
FUND VERIFIED. THIS SURVEYOR CANNOT ACCEPT
LIAELLITY FOR ONDERGRDUND STRUCTURE LOCATION.
Suite 301. 530 North 'i'rade Street
Winston-Salem; NC 27101.
Telephone [phone]
Fax [phone]
DAV&MA0N4P01NEI1 & A,S=., INC.
94GINURNG-LAND PLANNI
6415 OLD PLANK ROAD
HIGH POINT, NORTH CAROUNA 27265
PHONE [phone] FAX [phone]
UC>: NW: F-0246
DMP PROJECT # 000139
. s{S,6 tlr life..
-*I f- • T. GU
C`k
l"It iltt{1{
Project:
WALKERTOWN HIGH SCHOOL
FORSYTH COUNTY
Sheet Title:
POST DEVELOPMENT DRAINAGE
PLAN
BASINS 3 AND 4
Issue Date:
JUNE 5, 2009
Revisions:
8.4.09 PER STORMWATER REV.
Apprts�ei
Conatructlan in aCCord�riCr wilt tt,e5e documents is
required by the stormwater peonit North Carolina
Tines require that the stormwater system designer
inspect during construction; certify conformity with ft
Plans r4.nFi r c
StGTrr + t n `!„ire with the
Pe I I -Sw 44'3�Ga t
Sheet # 3�J - water quality
Revision Date
Project Number:
000 - 000
Sheet Number:
SLU�l P aa- 4
Aa ins 4wenb of terrice these drawiags tad the design repront-
ed are the property of Tatter Robbs CaDahaa & Pierce Archited%
PA. Reproductka• or ese of these drawing other than for The
project intended without written consent from the er-Wtecl v pro -
bibited. Unauthorized use will be subject to ko action.

N
42" C.A.A.P. BARREL
12 GUAGE
-�-- 0 0.51
INV. 917.00
POURED
INVERT
PROPOSED 66" DIA. 10 GAUGE
3" x 1" CORRUGATED ALUMINUM
TRASH RACK, SEE THIS SHEET
FOR DETAILS
/Axl"
OF
WE
4" WATER QUALITY
RELEASE ORIFICE
W/ TRASH GUARD
ELEV. 926.00
/'E2 GUAGE
54" C.A.A.P.
RISER %
FILL W/ 3000
PSI CONCRETE
150 PCF
3000 PSI CONCRETE
150 PCF
CONCRETE RISER
8'---0" SQUARE FOOTING TO BE ON
UNDISTURBED SOIL
RISER PIPE DETAIL
NOT TO SCALE
F
PORARY WATER
QUALITY ZONE
ELEV. 926.00
.1/2- U-BOLT
PERMANENT POOL
7.0' DEEP
6" DRAIN
SHEAR GATE
LIFT ROD
do FRAME ELEV. 919.00
SEDIMENT
STORAGE
ELEV. 9177
TOP OF RISER
728.50
8" PVC
STUBBED
INTO RISER
12"
4" WATER QUALITY
RELEASE ORIFICE
ELEV. 926.00
J
TRASH GUARD
NTS
8" PVC TEE
TEMPORARY POOL
8" PVC TEE
PERMANENT POOL
8" PVC CAP WITH
4"0 HOLE DRILLED
6"
GRAPHIC SCALE
30 15 0 30 60
1 " = 30 FEET
24" x 1/4" THICK ALUMINUM
ANTI -VORTEX PLATES EACH WAY
WELD INTERSECTIONS
5/8" DIA. ALUMINUM RODS ® 12" O.C.
EACH WAY. TYPICAL
/ WELD ALL INMRSEC'nONS
PROPOSED B4
/3" x 1 " CORR
TRASH RACK
24" x 1/4" THICK ALUMINIUM
PROPOSED 66" DIA. ANTI -VORTEX PLATES
C.A.A.P. RISER WELD INTERSECTIONS
ELEVATION
66" C.A.A.P. RISER
TRASH RACK DETAILS
NOT TO SCALE
1 0+ 00
5/8` DIA. ALUMINUM ROCS 0 12" O.C.
EACH WAY, TYPICAL
WELD ALL INTERSECTIONS
PLAN
PURPLE TOP
TRIDENS FLA VUS
"H"
BIG BL UE STEM
ANDROPOGON GERARDII
"H N
RED TOP
AGROS77S ALBA
'
DUCK POTATO
SAGITTARIA LA77FOLIA
'"HA'
THREE SQUARE BULRUSH
SCIRPUS AMERICANUS
"H ""
"
SOFT STEM BULRUSH
SCIRPUS VALIDUS
"H"
AREA TO BE SEEDED = 8, 900ot Sq. fT PLANTS MUST BE PURCHASED FROM A LOCAL SOURCE
RA TES PER LANDSCAPING STANDARDS FAMILIAR W1 TH THE REGIONS GROWING CONDITIONS.
PLANTING SEQUENCE
1. PLANTINGS WITHIN THE PERMANENT POND SHALL BE DONE
AFTER THE POND HAS BEEN RESTORED TO DESIGN DEPTH AND
THE POND IS NO LONGER BEING USED AS A SEDIMENT BASIN.
2. PLANTS ARE TO BE PURCHASED FROM A LOCAL SUPPLIER
FAMILIAR WITH THE REGIONAL GROWING CONDITIONS.
3. CONTRACTOR SHALL PREPARE PLANTING AREA PER
LANDSCAPING SPECIFICATIONS.
4. PLANTS SHALL BE INSTALLED DURING THE APPROPRIATE
GROWING SEASON AS ESTABLISHED BY LANDSCAPE
INDUSTRY STANDARDS.
5. ALL MEANS TO ENSURE PLANT SURVIVAL SHALL BE
IMPLEMENTED. THESE INCLUDE BUT ARE NOT LIMITED TO:
INITIAL FERTILIZATION, CONTROL OF INVASIVE WEEDS,
ANIMAL AND VANDAL DAMAGE, MULCHING, STAKING AND
WATERING. STAKING SHALL BE REMOVED AFTER PLANT
ESTABLISHMENT.
6. PLANTS SHALL BE CLUMPED TOGETHER TO FORM
LANDSCAPE ISLANDS INSTEAD OF BEING PLANTED IN A
STRAIGHT LINE TO ESTABLISH A NATURALISTIC
APPEARENCE.
7. SHALLOW WATER PLANTS SHALL BE INSTALLED BETWEEN
APRIL 1 AND JULY 15.
8. DAM EMBANKMENT, TOP OF DAM AND INSIDE OF DAM
DOWN TO VEGETATED SHELF SHALL BE PLANTED WITH
FESCUE GRASS. GRASS SHALL BE MOWED TO A HEIGHT
NO LOWER THAN 4".
SPILLWAY PIPE SPECIFICATIONS
A. CORRUGATED ALUMINUM ALLOY PIPE (C.A.A.P.)
1. THE PIPE SHALL MEET THE APPLICABLE REQUIREMENTS
OF CURRENT A.A.S.H.T.O. SPECIFICATIONS M-196,
LATEST EDITION.
2. THE PIPE SHALL BE FABRICATED WITH TWO ANNULAR
CORRUGATED REROLLED ENDS OR BE FURNISHED WITH
FLANGED ENDS TO BE CONNECTED USING STAINLESS
STEEL HARDWARE AND CLOSED CELL NEOPRENE GASKETS.
WHERE REROLLED ENDS ARE USED, A HUGGER TYPE BAND
WITH "0" RING GASKETS WILL BE REQUIRED.
3. THE PIPE SHALL BE FORMED FROM SHEET CONFORMING TO THE
REQUIREMENTS OF A.A.S.H.T.O. SPECIFICATION M-197.
THE CORE ALLOY SHALL BE 3004-H34, CLAD ON BOTH SIDES
WITH ALLOY 7072.
STORMWATER LEVELS
PREDEVELOPMENT POST DEVELOPMENT
BASIN LEVEL
10 YEAR
8.87 cts. 4.26 cts
928.91
100 YEAR
11.21 cts. 33.78 cts
929.3()
CONSTRUCTION SPECIFICATIONS
1) Site preparations - Clear, grub, and strip topsoil from areas
under the embankment to remove trees, vegetation, roots, and
other objectionable material. To facilitate sediment cleanout
and restoration, clear the pool area of all brush, trees, and
other objectionable materials. Stockpile ail topsoil or sail
containing organic matter for use on the outer shelf of the
embankment to facilitate vegetative establishment. Place
temporary sediment control measures . below the basin as needed.
2) Cut-off trench - Excavate a cut-off trench along the
centerline of the earth fill embankment. Cut the trench to
BUTTERFL Y WEED ASCLEPIAS TUBEROSA "H"" 10Z OF SEED MIXTURE stable soil material, but in no case make it less than 2 feet
deep. The cut-off trench must extend into both abutments to
at least the elevation of the riser crest. Make the minimum
3J, ' OF SEED MIXTURE
bottom width wide enough to permit operation of excavation and
compaction equipment but in no case less than 2 feet. Make
20.E OF SEED MIXTURE
side slopes of the trench no steeper than 1:1. Compaction
requirements are the same as those for the embankment. Keep
the trench dry during backfilling and compaction operations.
17Z OF SEED MIXTURE
3} Embankment - Take fill material from the approved areas shown
on the plans. It should be clean mineral soil, free of roots,
150 PLANTS SPACED 240 APART
PLANT IN THE FIRST 6- OF WATER LEVEL
woody vegetation, rocks, and other objectionable material.
Scarify areas on which fill is to be placed before placing
fill. The fill material must contain sufficient moisture so
150 PLANTS SPACED 24" APART
PLANT IN THE FIRST 6" OF WA TER LEVEL
it con be formed by hand into a ball without crumbling. If
water can be squeezed out of the ball, it is too wet for
150 PLANTS SPACED 24" APART
proper compaction. Place fill material in 6 to 8 inch
PLANT IN THE FIRST 6" OF WA TER LEVEL
continuous layers over the entire length of the fill area and
then compact it. Compaction may be obtained by routing the
construction hauling equipment over the fill so that the
entire surface of each layer is traversed by at least one
wheel or tread track of the heavy equipment, or a compactor
may be used. Construct the embankment to an elevation 10%
higher than the design height to allow for settling.
4) Conduit spillways - Securely attach the riser to the barrel or
barrel stub to make a watertight structural connection.
Secure all connections between barrel sections by approved
watertight assemblies. Place the barrel and riser on a firm,
smooth foundation of impervious soil. Do not use pervious
material such as sand, gravel, or crushed stone as backfill
around the pipe or anti -seep collars. Place the fill material
around the pipe spillway in 4-inch layers and compact it under
and around the pipe to at least the some density as the
adjacent embankment. Care must be taken not to raise the pipe
from firm contact with its foundation when compacting under
the pipe haunches.
Place a minimum depth of 2 feet of hand -compacted backfill
over the pipe spillway before crossing it with construction
equipment. Anchor the riser in place by concrete or other
satisfactory means to prevent flotation. In no case should
the pipe conduit be installed by cutting a trench through the
dam after the embankment is complete.
5) Emergency spillway - Install the emergency Spillway in
undisturbed soil. The achievement of planned elevations,
grade, design width, and entrance and exit channel slopes are
critical to the successful operation of the emergency
spillway.
6) inlets -Discharge water into the basin in a manner to prevent
erosion. Use diversions with outlet protection to divert
sediment
laden water to the upper end of the pool area to
PERSPECTIVE improve basin trap efficiency. (References: Runoff Control
Measures and Outlet Protection)
RIP -RAP GABION FOREBA Y WALL 7} Erosion control -Construct the structure so that the
N. T.S. disturbed area is minimized. Divert surface water away from
bare areas. Complete the embankment before the area is
cleared. Stabilize the emergency spillway embankment and all
WIRE MESH SHALL BE CONSTRUCTED OF 0.118 (3.00 mm) GAGE WELDED other disturbed areas above the crest of the
principal
rences: Surface
WIRE MESH OF A NOMINAL SIZE 3 x3,(76mmx76mm). ALL WIRE USED spillwayafter immediately aer construction. (R
SHALL CONFORM TO ASTM A641 SOFT TENSILE (minimum 60,000 psi), WITH Stabilization)
A CLASS 3 GALVANIZED COATING. EACH WELDED CONNECTION SHALL HAVE 8) Safety - Sediment basins may attract children and can be
A MINIMUM SHEAR STRENTH IN ACCORDANCE WITH ASTM A185. dangerous. Avoid steep side slopes and fence and mark basins
with warning signs if trespassing is likely. Follow all state
PROTECTIVE COATING; WHERE ADDITIONAL PROTECTION IS REQUIRED SHALL and local requirements.
BEAN EPDXY COATING. MAINTENANCE
NOTE: IF POND IS USED AS A TEMPORARY SEDIMENT BASIN Check sediment basins after periods of significant runoff. Remove
THE SEDIMENT MUST BE REMOVED BEFORE MAINTENANCE sediment and restore the basin to its original dimensions when
RESPONSIBILITY IS TRANSFERRED TO WINSTON SALEM/FORSYTH CO. SCHOOLS. sediment accumulates to one-half the design depth.
SEDIMENT REMOVED FROM THE POND WILL BE STORED WITHIN THE CONFINES OF THE PROJECT
PERMANENT POOL
ELEV.{FT)
AREA {SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIVE
VOLUME (CF)
919
34436
35227
35227
920
36018
35227
36825
36825
921
37632
72052
38155.35
38455.35
922
39278
110507
40117.50
40117.50
923
40956
150625
41811.65
41811.65
924
42667
192436
43537.35
43537.35
925
44408
235974
47326,40
47326.40
926
50244
I ___T
283300---
SEDIMENT STORAGE
ELEV.(> T)
AREA (SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIV
E VOLUME
(CF)
917
31368
32127
32127
918
32886
32127
33661
33661
919
34436
65788
11+00
3'
FOREBAY AREAS
ELEV.{FT)
AREA {SF}
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIVE
VOLUME (CF)
919
7369
7807
7807
920
8246
7807
8538
8538
921
8830
16346
9132.25
9132.25
922
9434
25478
9745.20
9745.20
923
10056
35223
10377.10
10377-10
924
10698
45600
11027.45
11027.45
925
11357
56628
TEMPORARY POOL
ELEV.(FT)
AREA (SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIVE
VOLUME (CF)
926
50244
53587
53587
927
56929
53587
58675
58675
928
60421
112262
61304.40
30625.20
928
62187
142915
1 2+ 00
Check the embankment, spillways, and outlet for erosion damage, and
inspect the embankment for piping and settlement. Make all
necessary repairs immediately. Remove all trash and other debris
from the riser and pool area.
, ?OND MA
077ENMWE REQ TIIREMEN'1'S:
1. INSPECT MOWTHL Y, OR AFTER EVERY RUNOFF -PRODUCING RAINFALL EVENT, WHICHEVER COMES FIRST.
A. REMOVE DEBRIS FROM THE TRASH RACK.
B. CHECK AND CLEAR THE ORIFICE OF ANY COSTRUCTIONS. IF A PUMP IS USED AS THE DRAWDOWN
MECHANISM, CHECK FOR PUMP OPERA VaV
C. CHECK THE POND SIDE SLOPES; REMOVE TRASH, REPAIR ERODED AREA BEFORE THE NEXT RAINFALL
EVENT.
D. IF THE POND IS OPERA TED W 7H A VEGETA TED FIL TER, CHECK THE FIL TER FOR SEDIMENT
ACCUMULA770N, EROSION AND PROPER OPERA770M OF THE FLOW SPREADER MECHANISM. REPAIR
AS NECESSARY.
2. QUAR7ERL Y
A. INSPECT THE COLLE07701V SYSTEM (I.E., CATCH BASINS, PIPING, GRASSED SWALES) FOR PROPER
FUNC7701VING. CLEAR ACCUMULATED TRASH FROM BASIN GRATES AND BASIN BOTTOMS, AND CHECK
PIPING FOR 0857RUC77CWS.
B. CHECK POND INLET PIPES FOR UNDERCU777NG, REPLACE RIPRAP, AND REPAIR BROKEN PIPES
C. RESEED GRASSED SWALES INCLUDING THE VEGETA TED FIL TER IF APPLICABLE, T WCE A YEAR AS
NECESSARY. REPAIR ERODED AREA IMMEDIATEL Y.
3. EVERY 6 MONTHS
A. REMOVE ACCUMULATED SEDIMENT FROM THE BOTT77M OF THE OUTLET STRUCTURE.
8. CHECK THE POND DEPTH AT VARIOUS POINTS IN THE POND. IF DEPTH IS REDUCED TO 76X OF
ORIGINAL DESIGN DEPTH, SEDIMENT WJLL BE REMOVED TO AT LEAST ORIGINAL DESIGN DEPTH.
4. GENERAL
A. MOW THE SIDE SLOPES, NOT INCLUDING NOR44ALL Y SUBMERGED VE6FTATED SHELF, ACCORDING TO
ME SEASON. MAXIMUM GRASS HEIGHT WILL BE 6",
B. CATTAILS, AND OTHER INDIGENOUS WE77AND PLANTS ARE ENCOURAGED ALONG THE POND
PERIMETER, • HOWEVER, THEY MUST BE REMOVED WHEN THEY COVER THE EN77RE SURFACE AREA OF
7HE POND.
C THE ORIFICE lS DESIGNED TO DRAW DOWN THE POND IN 2-5 DAYS IF DRAW DOWN IS NOT
ACCOMPLISHED IN THAT ME, 7HE SYSTEM MAY BE CLOGGED. THE SOURCE OF 711E CLOGGING
MUST BE FOUND AND EUMINA 7ED.
D. ALL COMPONENTS OF 7HE DETEN770N POND SYSTEM MUST BE KEPT IN GOOD WORKING ORDER.
ATTACH SKIMMER TO DRAIN SHEAR GATE 4" PVC
WHILE POND IS BEING USED FOR
SEDIMENTATION CONTROL. REMOVE SKIMMER
AND INSTALL DRAIN SHEAR GATE AND
LIFTING ROD WHEN POND IS TO BE
CONVERTED INTO A PERMANENT POND.
INSTALL WITH 1' ORIFICE
TO CONTROL POND
DRAINDOWN
R ply HOSE
A 1
1 3+00
DETAIL OF SKIMMER 4" PVC v
TOP OF DAM
931.00
6" ' - MIN. �
929.50
2 8'
WIDE
EMERGENCY SPILLWAY
N TS
14+00
Winston-Salem, NC 27101
Telephone [phone]
Fax [phone]
DAVIS-MARTIN-POWEL L & AS=., INC.
ENGINEERIINGLl4ND PLANNING-VJRVIEYING
6415 OLD PLANK ROAD .
HIGH POINT. NORTH CAROLINA 27265
PHONE [phone] FAX [phone]
LI : F-0245
DNS PROJECT # 080139
441r{➢Y37RjrF';
CAR '"rP
S 1
M
w
SEAS
033880
-il-
4;
iV
sfF'er+rr rr➢s$vp+..
Project:
WALKERTOWN HIGH SCHOOL
FORSYTH COUNTY
Sheet Title:
PERMANENT POND SHEET
Issue Date:
JUNE 5, 2009
Revisions:
6.15.09 POST DOI REVIEW
7-24-08 PER DENR REVIEW
7-29-08 SHEET REVISED PER
STORMWATER REVIEW
Approved Stormwater Permit Documents
Construction in accordance with these documents is
required by the storrnwatef permit North Carolina
rules require that the sv rm. water system designer
lnspsct during ConStRuction: t;ertifV conformity with the
plans and specs-, and carlity compliance with the
8tprrrnxater rules. (15A NCAC 2H 1008 (j) )
lwtmh;0 gu 4a7�a+
by 6L NC Division of Water Qualify
Sheet # cE. L Revision pale 7.2i•
Project Number.
000-aoo
Sheet Number:
.�
As instruments of service these drawings and %e desiga represent-
ed M Ile property of 1101 r tisb6s Cellehaa & Piercc Arrhiteets,
PA. Reproduction, or use of khese drawings cEber Eban for the
project intended wittout "ttea consent from the ueWteet is pro-
NULed. Unmtbwmd ase will be subject to 10gal action.

I
ti
Lu
h
I
2
a
/
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col
- F M M FId��FN47 E v�l
19
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00
P \ \
- -A\ \ \
\ �o \0 \
90
C P P
1
r
GRAPHIC SCALE
30 15 0 30 60
1 " = 30 FEET
6"
NOTCH TRASH RACK
AROUND BARREL
vZrwv
36" C.A.A.P. BARREL
12 GUAGE
0 0.51%
IN V. 922.00
POURED
INVERT
PROPOSED 54" DIA.
C.A.A.P. RISER
PROPOSED 54" DIA. 10 GAUGE
3" x 1" CORRUGATED ALUMINUM
TRASH RACK, SEE THIS SHEET
FOR DETAILS
//A\
OF IS 9
3.5" WATER QUALITY
RELEASE ORIFICE
W/ TRASH GUARD
ELEV. 930.0
/ 12 GUAGE
/54" C.A.A.P,
RISER 7
FILL W/ 3000
PSI CONCRETE
150 PCF
3000 PSI CONCRETE
150 PCF
CONCRETE RISER
8'-0' SQUARE FOOTING TO BE ON
UNDISTURBED SOIL
RISER PIPE DETAIL
NOT TO SCALE
1
6" MIN. 1I
933.00
20'
WIDE
EMERGENCY SPILLWAY
MPORARY WATER
QUALITY ZONE
ELEV. 930.0
1 /2" U-BOLT
PERMANENT POOL
6.0' DEEP
6" DRAIN
SHEAR GATE ELEV. 924.0
LIFT ROD
& FRAME
SEDIMENT
24" x 1/4" THICK ALUMINUM
ANT! -VORTEX PLATES EACH WAY
WELD INTERSECTIONS 5/8" DIA. ALUMINUM RODS O 12' O.C.
5/8" DIA. ALUMINUM RODS O 12' O.C. EACH WAY, TYPICAL
WAY, TYPICAL WELD ALL. INTERSECTIONS
/EACH
WELD ALL INTERSECTIONS
PROPOSED 72" DIA. 10 GAUGE
/3" x 1' CORRUGATED ALUMINUM
TRASH RACK SKIRT
24" x 1/4" THICK AL
ANTI -VORTEX PLATES
WELD INTERSECTIONS
54" C.A.A.P. RISER
NTS
8" PVC TEE
SIZE
COMMON NAME
BOTANICAL NAME
CLASSIFICA TION
QUANTITY
BENT GRASS
AGROS77S PERENNANS
"H"
IOX OF SEED MIXTURE
SWAMP SUNFOLWER
HELIANTHUS ANGUSTIFOLIUS
"H"
10X OF SEED MIXTURE
BUTTERFL Y WEED
ASCLEPIAS TUBEROSA
"H"
10X OF SEED MIXTURE
PURPLE TOP
TRIDENS FLA VUS
"H'
3,3X OF SEED MIXTURE
BIG BLUE STEM
ANDROPOGON GERARDII
'°H"
20X OF SEED MIXTURE
RED TOP
AGROS77S ALBA
"H"
17X OF SEED MIXTURE
SAGITTARIA LA 77FOLIA
"H.
150 PLANTS SPACED 24" APART
DUCK PO TA TO
PLANT IN THE FIRST 6" OF WA TER LEVEL
SL
NHp
150 PLANTS SPACED 24" APART
THREE SOURRE BULRUSH
SCIRPUS AMERICANUS
PLANT IN THE FIRST 6" OF WATER LEVEL
150 PLANTS SPACED 24" APART
SOFT STEM BULRUSH
SCIRPUS VALIDUS
H"
PLANT IN THE FIRST 6' OF WA TER LEVEL
AREA TO BE SEEDED = 8,900t Sq. fT. PLANTS MUST BE PURCHASED FROM A LOCAL SOURCE
RA TES PER LANDSCAPING STANDARDS FAMILIAR WITH THE REGIONS GROWING CONDITIONS
PLANTING SEQUENCE
1. PLANTINGS WITHIN THE PERMANENT POND
SHALL BE DONE AFTER THE POND HAS BEEN
RESTORED TO DESIGN DEPTH AND THE POND IS NO
LONGER BEING USED AS A SEDIMENT BASIN.
2. PLANTS ARE TO BE PURCHASED FROM A
LOCAL SUPPLIER FAMILIAR WITH THE REGIONAL
GROWING CONDITIONS.
3. CONTRACTOR SHALL PREPARE PLANTING AREA
PER LANDSCAPING SPECIFICATIONS.
4. PLANTS SHALL BE INSTALLED DURING THE
APPROPRIATE GROWING SEASON AS
ESTABLISHED BY LANDSCAPE INDUSTRY
STANDARDS.
5. ALL MEANS TO ENSURE PLANT SURVIVAL
SHALL BE IMPLEMENTED. THESE INCLUDE BUT
ARE NOT LIMITED TO: INITIAL FERTILIZATION,
CONTROL OF INVASIVE WEEDS, ANIMAL AND
VANDAL DAMAGE, MULCHING, STAKING AND
WATERING. STAKING SHALL BE REMOVED AFTER
PLANT ESTABLISHMENT.
6. PLANTS SHALL BE CLUMPED TOGETHER TO
FORM LANDSCAPE ISLANDS INSTEAD OF BEING
PLANTED IN A STRAIGHT LINE TO ESTABLISH A
NATURALISTIC APPEARENCE.
7. SHALLOW WATER PLANTS SHALL BE INSTALLED
BETWEEN APRIL 1 AND JULY 15.
8. DAM EMBANKMENT, TOP OF DAM AND INSIDE
OF DAM DOWN TO VEGETATED SHELF SHALL
BE PLANTED WITH FESCUE GRASS. GRASS
SHALL BE MOWED TO A HEIGHT NO LOWER
THAN 4".
SPILLWAY PIPE SPECIFICATIONS
A. CORRUGATED ALUMINUM ALLOY PIPE (C.A.A_P.)
1. THE PIPE SHALL MEET THE APPLICABLE REQUIREMENTS
OF CURRENT A.A.S.H.T.O. SPECIFICATIONS M-196,
LATEST EDITION.
2. THE PIPE SHALL BE FABRICATED WITH TWO ANNULAR
CORRUGATED REROLLED ENDS OR BE FURNISHED WITH
FLANGED ENDS TO BE CONNECTED USING STAINLESS
STEEL HARDWARE AND CLOSED CELL NEOPRENE GASKETS,
WHERE REROLLED ENDS ARE USED, A HUGGER TYPE BAND
WITH "0" RING GASKETS WILL. BE REQUIRED.
3. THE PIPE SHALL BE FORMED FROM SHEET CONFORMING TO THE
REQUIREMENTS OF A.A.S.H.T.O. SPECIFICATION M-197.
THE CORE ALLOY SHALL BE 3004-H34, CLAD ON BOTH SIDES
WITH ALLOY 7072.
STORMWATER LEVELS
PREDEVELOPMENT
POST DEVELOPMENT
BASIN LEVEL
10 YEAR
74.70 cts.
47.36 cts
932.00
100 YEAR
94.18 cts.
65.67 cts
932.25
PERMANENT POOL
ELEV.(FT)
AREA (SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIVE
VOLUME (CF)
924
13932
14757
14757
925
15583
14757
16439
16493
926
17296
31197
18181.20
15181.20
927
19066
49378
19979.10
19979.10
928
20892
69357
3'
PERSPECTI VE
RIP -RAP GABION FOREBA Y WALL
N. T.S.
WIRE MESH SHALL BE CONSTRUCTED OF 0.118 (3.00 mm) GAGE WELDED WIRE
MESH OF A NOMINAL SIZE 3"x3" (76mmx76mm). ALL WIRE USED SHALL
CONFORM TO ASTM A641 SOFT TENSILE (minimum 60,000 psi), WITH A CLASS 3
GALVANIZED COATING. EACH WELDED CONNECTION SHALL HAVE A MINIMUM
SHEAR STRENTH IN ACCORDANCE WITHASTM A185.
PROTECTIVE COATING; WHERE ADDITIONAL PROTECTION IS REQUIRED SHALL BE AN
EPDXY COATING.
FOREBAY AREAS
ELEV.(FT)
AREA (SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIVE
VOLUME (CF)
924
3128
3447
3447
925
3766
3447
4102
4102
926
4438
7549
4790-00
4790.00
927
5141
12339
5507.15
5507.15
928
5873
17$46
SEDIMENT STORAGE
ELEV.(FT)
AREA (SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIV
E VOLUME
(CF)
922
11854
12365
12365
923
12877
12365
13404
13404
924
13932
25770
TEMPORARY POOL
ELEV.(FT)
AREA (SF)
AVE AREA
(SF)
VOLUME
(CF)
CUMULATIVE
VOLUME (CF)
930
27048
29317
29317
931
31586
29317
32679
32679
932
33771
61996
CONSTRUCTION SPECIFICATIONS
1) Site preparations - Clear, grub, and strip topsoil from areas
under the embankment to remove trees, vegetation, roots, and
other objectionable material. To facilitate sediment cleanout
and restoration, clear the pool area of all brush, trees, and
other objectionable materials. Stockpile all topsoil or soil
containing organic matter for use on the outer shell of the
embankment to facilitate vegetative establishment. Place
temporary sediment control measures below the basin as needed.
2) Cut-off trench - Excavate a cut-off trench along the
centerline of the earth fill embankment. Cut the trench to
stable soil material, but in no case make it less than 2 feet
deep. The cut-off trench must extend into both abutments to
at least the elevation of the riser crest. Make the minimum
bottom width wide enough to permit operation of excavation and
compaction equipment but in no case less than 2 feet. Make
side slopes of the trench no steeper than 1:1. Compaction
requirements are the some as those for the embankment. Keep
the trench dry during backfilling and compaction operations.
3) Embankment - Take fill material from the approved areas shown
on the plans. It should be clean mineral soil, free of roots,
woody vegetation, rocks, and other objectionable material.
Scarify areas on which fill is to be placed before placing
fill. The fill material must contain sufficient moisture so
it can be formed by hand into a bail without crumbling. If
water can be squeezed out of the ball, it is too wet for
proper compaction. Place fill material in 6 to 8 inch
continuous layers over the entire length of the fill area and
then compact it. Compaction may be obtained by routing the
construction hauling equipment over the fill so that the
entire surface of each layer is traversed by at Least one
wheel or tread track of the heavy equipment, or a compactor
may be used. Construct the embankment to an elevation 10%
higher than the design height to allow for settling.
4) Conduit spillways - Securely attach the riser to the barrel or
barrel stub to make a watertight structural connection.
Secure all connections between barrel sections by approved
watertight assemblies. Place the barrel and riser on a firm,
smooth foundation of impervious soil. Do not use pervious
material such as sand, gravel, or crushed stone as backfill
around the pipe or anti -seep collars. Place the fill material
around the pipe spillway in 4-inch layers and compact it under
and around the pipe to at least the some density as the
adjacent embankment. Care must be taken not to raise the pipe
from firm contact with its foundation when compacting under
the pipe haunches.
Place a minimum depth of 2 feet of hand -compacted backfill
over the pipe spillway before crossing it with construction
equipment. Anchor the riser in place by concrete or other
satisfactory means to prevent flotation. In no case should
the pipe conduit be installed by cutting a trench through the
dam after the embankment is complete.
5) Emergency spillway - Install the emergency spillway in
undisturbed soil. The achievement of planned elevations,
grade, design width. and entrance and exit channel slopes are
critical to the successful operation of the emergency
spillway.
6) Inlets - Discharge water into the basin in a manner to prevent
erosion. Use diversions with outlet protection to divert
sediment -laden water to the upper end of the pool area to
improve basin trap efficiency. (References: Runoff Control
Measures and Outlet Protection)
7) Erosion control - Construct the structure so that the
disturbed area is minimized. Divert surface water away from
bare areas. Complete the embankment before the area is
cleared. Stabilize the emergency spillway embankment and oil
other disturbed areas above the crest of the principal
spillway immediately after construction. (References: Surface
Stabilization)
8) Safety - Sediment basins may attract children and can be
dangerous. Avoid steep side slopes and fence and mark basins
with warning signs if trespassing is likely- Follow all state
and local requirements.
MAINTENANCE
Check sediment basins after periods of significant runoff. Remove
sediment and restore the basin to its original dimensions when
sediment accumulates to one-half the design depth.
Check the embankment, spillways, and outlet for erosion damage, and
inspect the embankment for piping and settlement. Make all
necessary repairs immediately. Remove all trash and other debris
from the riser and pool area.
POND MAINTENANCE REQUIREMENT'S:
1. INSPECT MONTHLY, OR AFTER EVERY RUNOFF -PRODUCING RAINFALL EVENT, WHICHEVER COMES FIRST.
A. REMOVE DEBRIS FROU THE TRASH RACK.
B. CHECK AND CLEAR THE ORIFICE OF ANY 08S7RUC77CVVS. IF A PUMP IS USED AS THE DRAWOOWN
MECHANISM, CHECK FAR PUMP OPERA 77CN.
C. CHECI' THE POND SIDE SLOPES, • REMOVE TRASH, REPAIR ERODED AREA BEFORE THE NEXT RAINFALL
EVENT.
D. IF THE POND IS OPERA TED WITH A VELETA TED FIL TER, CHECK THE nL TER FOR SEDIMENT
ACCUSIUL4 77ON EROSION AND PROPER OPERA 7701V OF THE FLOW SPREADER MECHANISV REPAIR
AS NECESSARY.
2 QUARTFRL Y
A. INSPECT THE COILLECIMN SYSTEM (1 E.., CATCH BASINS, PIPING GRASSED SWALES) FOR PROPER
FUNCAOVV/NG CLEAR ACCUMULATED TRASH flkw BASIN GRATES AND BASIN BOTTOMS, AND CHECK
P/PINC FAR OBSTRUCRONS.
B. cNECA' Paw INLET PIPES FOR UNDERCUTTING,, REPLACE RIPRAP, AND REPAIR BROKEN PIPES.
C. RESEED GRASSED SWALES INCLUDING THE VEGETATED RL TER IF APPLICABLE, 7WCE A YEAR AS
NECESSARY. REPAIR ERODED AREA IMMEDIA ZR Y.
.3: EVERY 6 MaVTHS
A. REMOVE ACCUMULATED SEDIMENT FROM 77-IE BOTTOM OF 7T,'E OUTLET STRUCTURE.
B. CHECK THE POND DEPTH AT VARIOUS POINTS IN THE- POND. IF DEPTH IS REDUCED TO 75X OF
ORIGINAL DES167V DEPTH, SEDIMENT WILL BE REMOVED TO AT LEAST ORIGINAL DESIGN DEPTH.
4. GENERAL
A. MOW THE SIDE SLOPES NOT INQLUDtw NARMALL Y SUBMERGED VEGETATED SHELF, ACCORDING TO
7HE SEASON. MAXIMUM GRASS HEIGHT INLL BE 6'_
B. CATTAILS, AND OTHER INDIGENOUS WETLAND PLAN7S ARE ENCOURAGED ALONG THE POND
PERIMETER, • HOWEVER, THEY MUST BE REMOVED WHEN THEY COVER THE EN77RE SURFACE AREA OF
THE POND.
C. THE CONRCE IS DE',9GNED TO DRAW DOWN 1NE POND IN 2-5 DAYS: IF DRAW DO IS NOT
ACCOMPLISHED IN THAT 77ME, THE SYSTEM MAY BE CLOGGED. 7HE SOURCE OF THE CYOGGNG
MUST BE FOUND AND ELIM/NA TED.
D. ALL COUPOIVEEN75 OF 7HE DETENTION POND SYSTEM MUST BE KEPT IN GOOD WORKING ORDER.
ATTACH SKIMMER TO DRAIN SHEAR GATE
WHILE POND IS BEING USED FOR
SEDIMENTATION CONTROL. REMOVE SKIMMER
AND INSTALL DRAIN SHEAR GATE AND
LIFTING ROD WHEN POND IS TO BE
CONVERTED INTO A PERMANENT POND.
4" PVC
Suite'301 530 North Trade Street
Winston-Salem, NC 27101
Telephone [phone]
Fax [phone]
DAVIS AAAR' W)OINEEI & AMC., INC.
ENGMIEERING-WIND PLANNING-4URVEYING
6415 OLD PLANK ROAD
HIGH POINT, NORTH CAROUNA 27265
PHONE (336>886A821 FAX [phone]
LICENSE. F-0245
DW PROJECr # 080139
9
_ SEAL
033880
X-
S
,•�''�rN. GUFF,-'
'�,refe[Ott,ter
Project:
WALKERTOWN HIGH SCHOOL
FORSYTH COUNTY
Sheet Title_
PERMANENT POND SHEET # 2
Issue Date:
JUNE 5, 2009
Revisions:
6.15.09 POST DOI REVIEW
7-29-08 SHEET REVISED PER
STORMWATER REVIEW
Approved StolmwatPr Permlt ftcuff1!ft
Construction in acrordar,a: „•,, , '-I-ents is
fequired by the stormwaier peI;rii,; . ,. na
rules require that the siormwater system designer
Inspect during construction, ceriity contormity with the
plans and specs, and certify compliance with the
stormwater rules (1 SA NCAC 2H 1008 (j) )
Permit#-__50'Folocbi Date 8111.0
by j�"(. NC Division of Water Quaft
$ItBtst G 4 ii _Revision Revision Date >r •Zf ,O
Project Number:
000 - 000
Sheet Number:
2" TYP
ELEVATION TRASH RACK DETAILS PLAN
NOT TO SCALE
10+00
11 + 00
12+00
13+ 00
SCALE:
HORIZ. 1 "=40'
VERT. 1 "=4'
/s instruments of service these Ira - and 11re desido m resent-
ed an the property of faker ttabhs Ca11e4so & Preece kddtmis,
PL ReproducLom, or we of these dmwuW other than for the
project iatmded wAmt written conemt from the architect is pro-
hibited. Uawatherimd an wik be mbjwt to III action