SW8060123_APPROVED PLANS_20060117

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 (l O123
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
200lo OI �1
YYYYMMDD

A
g
C
STORM WATER IMPROVEMENTS
CONTRACT 2
TASK 2 - LANE POND (7 SHEETS)
TASK 3 - SUTTON PLACE WETLAND AND DITCHES ( 5 SHEETS)
TASK 4 - PARK POND DITCH (5 SHEETS)
TO SERVE THE
TOWN OF LAKE WACCAMAW
COLUMBUS COUNTY. NORTH CAROLINA
MAYOR
COMMISSIONER
COMMISSIONER
COMMISSIONER
TOWN CLERK
- D.B. GOLDSTEN, JR.
---HUBERT EARL HARRIS
- BOBBY R. TEDDER, JR.
- IVAN WILSON
- LINDA NOBLE
RECEIVED
JAN 17 2006
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® HOBBS, UPCHURCH & ASSOCIATES, P.A.
CONSLX-TM ENC INEERS
SOUTHERN PINES, NORTH CAROLINA 28387

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Artesiaq
STORM WATER IMPROVEMENTS
TASK 2 -LANE POND
TO SERVE THE
TOWN OF LAKE WACCAMAW
COLUMBUS COUNTY. NORTH CAROLINA
LAKE WACCAMAW
MAYOR
COMMISSIONER
COMMISSIONER
COMMISSIONER
TOWN CLERK
- D.B. GOLDSTEN, JR.
- HUBERT EARL HARRIS
- BOBBY R. TEDDER, JR.
- IVAN WILSON
- LINDA NOBLE
LANE POND
PLAN SHEET INDEX
1. COVER SHEET
2. EXISTING SITE PLAN
3. PROPOSED STORMWATER WET POND 42
4. EROSION CONTROL PLAN
5. EROSION CONTROL DETAILS
6. DETAILS
7. DETAILS
/ap YK
01]50]
`x�lj;:�cmEEP.A +j
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HOBBS, UPCHURCH & ASSOCIATES, P.A.
CONSULTING ENGINEERS
SOUTHERN PINES, NORTH CAROLINA 28387
VICryT YAP
Lake W=cam — Columbus County, NoriM1 Carolina

10 2 7629"
2;,6 60
I
DITCH
I.
WOODS
EXISTING
TREE LINE
EXISTING EIP
ELEV: 57.95'
N 207322.1874
E 2145877.6031
EXISTING
DRAINAGE
DITCH
\ WOODS EXISTING EIP
ELEV 62 46' EXISTING EIP
IN 207518.6845
E 2146315M90 ELEV 64.50'
N 207593.5640
PROPERTY E 2146727.4472
EXISTING LINE
TREE LINE \—EMISnNG �-1EXISTIN1,
EIP
CONTOUR ELEV: 63.65'
N 207451.2739
'4a-,
E 2146709.79415
Nft
Lu
EXISTING
a! CONTOUR
-- -------- . .....
WETLAND AREA
BOUNDARY
EXISTING EIP
ELEV: 62.14'
EXISTING,
DRAINAGE 11 201252.1350
EXISTING EIP sft".4 E E 2146685322 , 4 1.
DITCH ,
ELEV 62.68' 400
N, 207320.2761
E 114,6291.0064
10 woo6s
WOODS.—,�/
EXISTING .............. . . . ..
DRAINAGE
DITCH
..........
EXISTING EIP
ELEV: 59.47'
N 206997.61307
E 2146653.9331
GRAPHIC SCALE
-Z � 2
LUC<
-<
0 ZM X
inoW
a-
60.0- > 0- ou 0
xwj z
O-Z 0-5
M:5w z
y z �:
of :5w
aNLS 0 U)
z
MU)Z
V)
O�
F- C w
KSL
DFW

if
PROPOSED 48 LF 4
INLET CULVERT W/
FLARED END SECTIONS PROPOSED CHAIN LINK
341 LF)
PROPOSED 12WIDE
SOIL ACCESS ROAD 12
BEGIN TO BE SEEDED AND
INVERT IN: PROPOSED MULCHED
INVERT OUT.CHAIN 1_11
I 55 5.FENC�
'
16, 29� w
60, 31
----.FILL IN EXISTING
H-TO--ELEV'7'iiO.0'
FOR 20 LF
V
(AFTER COMPLETION OF i I I
POND AND APPROVAL ;Ss
FROM ENGINEER) IFsr
-p
PROPOS
PROPOSED ING ery STORMWATER
CHAIN LINK OU
FENCE�,VONT R PROPOSED 18' cx:
WET POND --- DOUBLE SWING
SWALE 1_2 EXIN OUR STING GATE/ AND 2 PD., v
FILL AND RE -GRADE
EXISTING DITCH FOR PROPERTY
325 LF AND LINE W/ LINE IM COORDINATE �r; PROPERTY--//
012
(AFTER UUMV�IIVN UV' OWNER TOP . CE 200 w.
EXCELSIOR .. OF, EW�, 9 OPOSE15,
POND AND/APPR0VAIf_ R OF FILL IN THi.
FROM ENGI NjT�__
•PROPOSED STORMWATER R
OUTLET STRUCTURE FOR
FUTURE vgl
r, UTURE FORCE MAIN
k9MR-10
POSED 70
LL
ia SDR 21 PVC FILL AND PLACE 6" TOP
W/ 3' COVER AT% SOIL BETWEEN POND AND
FINAL GRADE HOUSE / SHOP. FINISH GRADE
ij 1 Fr BELOW FINISHED FLOOR TO
\ LINE POND (TOP OF BANK) AT 1%.
CAP END OF 18. L'u
AT THIS
, 'r
POINT AND SEED AND MULCH DISTURBED AREA.
ARK H ORANGE
M WITH
IRON PIPE
A!
�REMAINDER OF . ..... 'E18* FORCE MAN p
NOT IN THIS CONTRACT nj3< m Er
60.0— IL
1 L
PROPOSED 50' Q-K z a
0
EMERGENCY SPILLWAY
ELEV: 60.0' (ACROSS n_
PROPOSED ACCESS ROAD) END PROPOSED
CC w
CHAIN LINK FENCE-,, 04L,
SEE SKIMMER-- 0 0
0 3IL
DETAILS ON
SHEET 7 mqZ 0
PROPOSED
EXISTING j 0 OZ aCRAJJ LINK DRAINAGE ......
VI F
FENCE
PROPOSED 6 WIDE
PO
ND SPILLWAY ACROSS
PROPOSED ACCESS ROAD
IE FINISHED ELEV: 59.25' NOVEMBER, 2005
4 1 50'X14' OF ARMOR 1_0 KSL
if
BLOCK (#3510) OVER GRAPHIC SCALE
D.;
GEOTEXTILE (SEE DETAIL) DFW
0
KSL
1:40
f
PROPOSED STORMWATER WET POND #

0
PROPOSED 48 LF 48'
INLET CULVERT W/ 0
FLARED END SECTIONS PROPOSED SILT I I z 0
TREE BARRIER "
FENCING, IYP. PROPOSED 12' WIDE
TREE BARRIER \- SOIL ACCESS ROAD
w _FENCING. TYP. SEEDED AND
INVERT IN: BEGIN TO MULCHED BE
PROPOSED
FENCE
56.0' VE T Obi.
5 -------
START SWALE: L-2 iin
l 111 ilt
6 -2 ELEV. 60.0'
9
I
69ILL IN EXISTING V
DITCH --TO- E LEV-.'66'o*
FOR 20 LF
(AFTER COMPLETION
FROM ENGINEER) pq
........... .
TREE BARRIER PROPOSED
EXISTING FENCING. TYP. STORMWATER
TREE BARRIER
i — CONTOUR� WET POND P.
SWALE L2
FILL AND RE -GRADE
EXISTING DITCH FOR EXISTING uf
sM CONTOUR CONSTRUCTION,'� ENTRANCE .2
325 LF AND LINE W1 SEE DETAIL N SHEET 6 cc
EXCELSIOR MAT OR PROPERTY
UAL
(AFTER COMPLETION 15' LINE
to
vo
POND AND APPROVAL:'' ;o
FROM ENGINEER)
-w
OSEC SILT
FENCE
CVUlLtl STRUCTURE FOR H '41
PROPOSED STORMWATER
/FUTURE FORCE MAJN
--- - -------
4REE,9ARR16R R
�FENCING 'TYP-,
K SILT R,
3' ROC
0
SCREEN
V. �NO'DIG OR - FILL�
v
END SWALE L 2
`,ELEV: 59.0' x OBOUNDARY SEED POND BANK
7 (ELEV. 55' TO 61
4, WITH WETLAND SEED MIX Li
2.5' ROCK SILT SPRAY ON FLEXTERA FLEXIBLE
SCREEN GROWTH MEDIUM (FGM)
OR APPROVED EQUAL.
PROPOSE
SOIL ACCESS ­__
0
z z
M
f Lj i:zi
Z
w o a.
P
L)
ROPOSED 50' WIDEI ROCK SILT u.U_ 0 _1
EMERGENCY SPILL Of wj: 0
ELEV: 60.0' (ACROSS SCREEN ACROSS CLZ c
SPILLWAY
�5w
PROPOSED ACCESS AD I z
PROPOSED 0 w 2 0
END SWALE L-I PROPOSED• SILT FENCE 04y CC z
ELEV: 57.25 SWALE L-1 1.5' 0 0
(n
LINE W/ EXCELSIOR ROCK SILT,/ .. .... (1) Z a
MAT OR EQUAL SCREEN x (y
EXISTING .......
0
DRAINAGE
U)
RPRAP DITCH
DISSIPATOR #1
START SWALE L-I PROPOSED 60 WIDE
ELEV: 58.0' POND SPILLWAY ACROSS S
S
PROPOSED ACCESS AD
FINISHED L : 592..... NOVEMBER. 2005
80'X14' OF ARMOR LOC
BLOCK (E,3310) OVER GRAPHIC SCALE KSL
GEOTEXTILE (SEE DETAIL)
6 DFW
KSL
....... AS SHOWN
4
EROSION CONTROL PLAN
7

PERMANENT SEEDING SCHEDULE
UPLAND PERMANENT SEEDING MIXTURE WITH NURSE CROP
SPECIES RATE (LB./ACRE) DATE
TALL FESCUE & 80 AUG 20 — OCT 25
SERICEA LESPEDEZA 25 OR
KOBE LESPEDEZA 40 FEB 1 — APR 15
TEMPORARY SEEDING MIXTURE
SPECIES RATE (LB./ACRE) DATE
ANNUAL RYE (GRAIN) & 120 DEC 1 — APR 15
KOBE LESPEDEZA 50
GERMAN MILLET 40 APR. 15 — AUG. 15
ANNUAL RYE (GRAIN) 120 AUG 15 — DEC 30
NOTE:
TEMPORARY SEED MIX SHALL BE USED FOR ALL AREAS EXPOSED GREATER THAN ONE WEEK
AND SUBJECT TO FURTHER DISTURBANCE. PERMANENT SEED MIX SHALL BE CHECKED AND
RE —SEEDED AS NECESSARY DURING 1 YEAR WARRANTY.
SOIL AMENDMENTS (TILLED TO 6" DEPTH PRIOR TO SEEDING)
APPLY AGRICULTURAL LIMESTONE — 2 TONS/ACRE
APPLY FERTILIZER AT A RATE OF 1.000 LB/ACRE (10-10-10).
MULCH
MULCH — 2 TO 2 1/2 TONS/ACRE — SMALL GRAIN STRAW OR EQUIVALENT COVER.
ANCHOR — ASPHALT EMULSION ON SLOPES. ® 430 GAL./ACRE (TYPE R.S.)
MULCH ANCHORING TOOL SHALL BE USED ON ALL OTHER AREAS.
WETLAND / POND BANK SEED MIX
FOX SEDGE
SOFT CUSH
SWITCH GRASS
OR APPROVED NATIVE SPECIES EQUAL
— MIXES AND RATES AS PER MANUFACTURER'S / MIXER'S INSTUCTIONS.
Maintenance Plan
1. All erosion and sediment control practices will be checked for stability and operation
following every runoff -producing rainfall but in no rase less than once every week. Any
needed repairs will be made immediately to maintain all practices as designed.
2. Sediment will be removed from behind the sediment fence when it becomes about 0.5 tt deep
at the fence. The sediment fence will be repaired as necessary to maintain a barrier.
3. All seeded areas will be fertilized, reseeded as necessary, and mulched according to
specifications in the vegetative plan to maintain a vigorous, dense vegetative cover.
4. Gravel for rock check dams will be cleaned or replaced when the water no longer drains
properly. Sediment will he removed from behind the dams when it becomes approximately 0.5
R deep.
Construction Schedule
1. Obtain copy of approved plan and applicable permits.
2. Flag the limits of construction and tree protection areas.
3. Construct temporary construction entrances/exits.
4. Install erosion control silt fencing.
5. Construct rock silt screens at locations shown on swale L-I.
6. Clear and grub site.
8. Construct outlet structure and pond.
9. Construct maintenance mad.
IO.Complete seeding and mulching ofsite.
11. Graded slopes and fills arc in be planted or provided with protective cover under
vegetative stabilization as noted in the plans and specifications. All areas upon which
no further land disturbing activities will be undertaken are to be planted or provided
with a protective cover within 15 working days.
12. When the average height of turf in the area becomes greater than 5 inches, mow an
a 3-inch height.
13. Maintain erosion control devices periodically and after all runoff -producing rains.
14. When construction is complete and all areas stabilized, call for an onsite
inspection by the sediment and erosion control officer.
15. Once the site is approved, remove temporary measures and seed remaining
disturbed areas.
16. When vegetation is established, call for final site inspection.
DIVERSION
SWALE DESIGN
SWALE
NO.
CHANNEL
SLOPE
SIDE
SLOPE
BOTTOM
WIDTH
UNING
TYPE
1
1 .0021
1 1.5:1
4'
EM
2
.0029
6:1
4'
SAdA
UNING TYPES
S&M: SEED AND MULCH
EM: EXCELSIOR MATTING
COMPACTED BACKFlLL
OR GRAVEL
NOTE
USE CLASS B STONE FOR
STRUCTURAL STONE AND
PAY FOR AT THE CONTRACT
UNIT PRICE PER TON STONE
FOR EROSION CONTROL,
CLASS B.
USE NO. 5 OR NO. 57 STONE
FOR SEDIMENT CONTROL AND
PAY FOR AT THE CONTRACT
UNIT PRICE PER TON SEDIMENT
CONTROL STONE.
CONSTRUCT DAM A
MAXIMUM OF 1 FT. ABOVE
NORMAL FLOW DEPTH.
V.6" MIN
_. I• .
r
gI11rKOl STORE / STRUCTNNL STONE MIN.
ROCK SILT SCREEN DETAIL"
N.T.S. FRONT VIEW
STANDARD STRENGTH FABRIC
SUPPORTED WITH WIRE
MESH WITH POSTS 8' O.C.
—OR—
EXTRA STRENGTH FABRIC
WITH POSTS 6' O.C.
FLOW -III
EXTEND FABRIC AND
PARE INTO TRENCH
SILT FENCE DETAIL
N.T.S.
NOTES:
1. REMOVE ANY SEDIMENT GREATER
THAN 12" DEEP. REPAIR ANY
UNDERMINING IMMEDIATELY.
TOP OF WK J
I
POSTS OF EITHER
♦'0 PINE,
2'0 OAK, OR
1.33 B/FT STEEL
49E aF STRFMI �
TOP VIEW
TOP OF WK
CROSS SECTION
z 3
w o ¢ Q
> (L
az3 0
�gW Z
Y Z
W IS o
QC-4 C
L Z
3Yo V 0
n z O
O_'H3 0
N 1- W
s..
rarer rv0.
5

a
TYPIC
FILARI
SECT
ISOMETRIC VIEW
RIPRAP
RCP PIPE FLARED END OUTLET DETAIL
N.T.S.
MIN •• OF SWALE
FLOW OF DITCH
SECTION VIEW
NATURAL
rl GROUND
PROPOSED RCP
CROSS SECTION I
TEMPORARY SWALE CROSSING DETAIL
N.T.S.
SIDE BOTTOM WIDTH
SLOPE
1 6L.
SWALE
DEPTH SEED AND
MULCH SHOULDER
AND SWALE
SEED & MULCH GRASS SWALE
BOTTOM WIDTH
SIDE
SLOPE yy
FUTERRA FL NETLESS 1 UN
BLANKET OR — _- DE
i
APPROVED EQUAL- a�
OVERLAP AT SEAMS
STAPLES 2' O.C. SEED DISTURBED AREA AS PER
BOTH DIRECTIONS LINING WIDTH it PLANS AND SPECIFICATIONS
PRIOR TO INSTALLING BLANKET.
EROSION CONTROL BLANKET (ECB)
NOTE: PREPARE, SEED AND INSTALL TEMPORARY UNINC
ON DISTURBED AREA OF DITCH.
SWALE LINING DETAILS
NOT TO SCALE
RCP AT
RCP AS -
REQUIRED
OUTLET
ROW —
12" \ IFILTER FABRIC TO
BE INSTALLED UNDER
RIP —RAP DISSIPATOR
N.T.S.
jDlSSPATORj L 1 WI I W21 THICKNESS1 PoPRAP CLASS
/I IV 60 60' IBP 1 B
NOTES: APPLICABLE AT ALL POINTS OF
�OPfl INGRESS & EGRESS UNTIL SITE IS
STABILIZED, FREQUENT CHECKS OF
P THE DEVICE AND TIMELY
_ MAINTENANCE MUST BE PROVIDED.
AGGREGATE
2-3P
CONSTRUCTION ENTRANCE NOTES:
a. GRAVEL PAD TO BE 15'. 50' AND 6' THICK MINIMUM
b. TURNING RADIUS SUFFICIENT TO
ACCOMMODATE LARGE TRUCKS IS TO BE
PROVIDED.
c. ENTRANCE(S) SHOULD BE LOCATED TO
PROVIDE FOR MAXIMUM UTIUTY BY ALL
CONSTRUCTION VEHICLES.
d. MUST BE MAINTAINED IN A CONDITION
WHICH WILL PREVENT TRACKING OR
DIRECT FLOW OF MUD ONTO STREETS.
PERIODIC TOPDRESSING WITH STONE
WILL BE NECESSARY; KEEP SOME HANDY.
e. ANY MATERIAL WHICH STILL MAKES IT
ONTO THE ROAD MUST BE CLEANED UP
IMMEDIATELY.
TEMPORARY CONSTRUCTION ENTRANCE
NOT TO SCALE
s
DM.
NO.
8P
ti
a
o�
j

m
10' OF CLASS B
ORANGE, UV —RESISTANT,
3' 5'-0' O.C. MAX. HIGH —TENSILE STRENGTH,
POLY BARRICADE FABRIC
6" 5'-0" 6" PRECAST TOP T 'tTlee PIdOgN0f1 Aloe
W/ 2'%3'
LOCKABLEITOP
ALUMINUM
EL 60.9T HATCH 40' Y •v
I0.0 4' SECTION 6' LONG WEATHERPROOF SIGN
OF 301 RCP 3D'0 RCP SEE NOTES BELOW FOR
FLARED END CONSTRUCTION AND POSTS MAY BE EITHER
SECTION ACING DATA I� 4 DIA. PINE, 2" DIA.
SPACING
OAK, OR 1.33 LB/LF
TES: STEEL
. INSTALL
ST LL TREE PROTECTION FENCE AND SIGNAGE PRIOR TO CALLING FOR THE INITIAL
FLOW FLOW ON SITE INSPECTION. SUBGRADE
2. WARNING SIGNS TO BE MADE OF DURABLE, WEATHERPROOF MATERIAL.
INV OUT: 55.1' 3. LETTERS ARE TO BE 3' HIGH MINIMUM, CLEARLY LEGIBLE AND SPACED AS DETAILED.
4. SIGNS ARE TO BE PLACED NO GREATER THAN 200' ON CENTER.
5. PLACE A SIGN AT EACH END OF LINEAR TREE PROTECTION AREAS AND 200' ON CENTER THEREAFTER.
6. FOR TREE PROTECTION AREAS LESS THAN 200' IN PERIMETER, PROVIDE NO LESS THAN ONE SIGN PER PROTECTED AREA.
TF-1 TIDEFLE% 7. ATTACH SIGNS SECURELY TO FENCE POSTS AND FABRIC.
CHECK VALVE B. MAINTAIN TREE PROTECTION FENCE THROUGHOUT DURATION OF PROJECT.
TREE PROTECTION FENCE DETAIL
N.T.S.
48"X48" PRECAST
WAFFLE BOX W/ 8" RISER
AND PRECAST TOP
(NCDOT APPROVED)
FORCE MAIN OUTLET DETAIL
PROPOSED FAIRCLOTH
FLOATING SKIMMER
W/ 4" HEAD AND
3.65' OPENING
4.875' •' 9. Io' 15.75'-
3.76'
6 � ...15'
14' OF ARMORLOC BLOCKW510),
4" THICK OVER GEOTEXIILE
SECTION A —A
NOT TO SCALE
41 SCHEDULE 40
INVERT INTO BANK: 58.0'
INVERT INTO SWALE L-1: 57.75'
OUT
BY
FLOATING SKIMMER DETAIL
N.T.S.
ACCESS DOOR
FILLED
PIPE FLOAT
i
G•
N.WD: KSL
oiuwrv:
DFW
CHECKED:
KSL
scuE:

Artesia
STORM WATER IMPROVEMENTS
TASK 3
BUTTON PLACE WETLAND AND DITCHES
TO SERVE THE
TOWN OF LAKE WACCAMAW
SITE
LAKE WACCAMAW
COLUMBUS COUNTY, NORTH CAROLINA
MAYOR
COMMISSIONER
COMMISSIONER
COMMISSIONER
TOWN CLERK
VICINTY MAP
Lake Waccamaw — Columbus County, North Carolina
- D.B. GOLDSTEN, JR.
- HUBERT EARL HARRIS
- BOBBY R. TEDDER, JR.
- IVAN WILSON
- LINDA NOBLE
PLAN SHEET INDEX
1. COVER SHEET
2 EROSION CONTROL PLAN
3. STORMWATER WETLAND AND
SWALE 3B PLAN AND PROFILE
4. SWALE 3B CROSS SECTIONS
5. PROPOSED SUTTON PLACE POND DETAILS
SF
0275
11_ t¢-0$
® HOBBS, UPCHURCH & ASSOCIATES, P.A.
CONSULTING ENGINEERS
SOUTHERN PINES, NORTH CAROLINA 28387

IR g 9
sz i ', 9 IMI lh-1I I --- -�-- i
% I N+fl fl+KI
/I I I I I 99 IP41 IWI I
----
EXISTING 10' WIDE
MAINTENANCE ROAD
Construction Schedule
w
i
u
i
'• - ._. .,-'---. _, ...-._._..
II
I. Obtain copy of approved plan and applicable pemmits
2. Flag the linos ofconstmction.
3. Construct tenporary construction entrances/exits.
i
x
PARK POND /
11 ' •= :, PROPOSED
ROCK SILT
SCREEN
•` _ _ - 1
�• i I
I �sg� — _ PROPOSED ,�il�
I SILT FENCE
u/s,/PROPOSED '
// i 40' X 25' WIDE
a a V j PRIMARY
�� / CONSTRUCTION
ENTRANCE W/ I
32LF 24•0 RCP
EXISTING SOIL ROAD -� I
.� /-- W FLARED ENDS
V I I I
�I I PROPOSE I I
II I 20' WIDE SOIL
PROPOSED it ACCES ROAD
SILT FENCEf /
/
/ I
AI
/
1
:
t
4. Rer ove trees from site and access road as necessary to place silt fencing -obtain
permission from engirxcr prior to removing anytrea greater than 6-inches in diameter.
5. Cons
Constructsilt fence
6. Complete clearing and grubbing and stockpiletopsoil.
7. Coordinate with Owner for burning of trees and bush or haul away.
S. Construct pond anlet struchae.
9. Construct pond, seed and mulch, and place erosion control blanket on pond slopes.
10. Construct Swale 3B and lace rock silt scccs.
p
11. Seed Swale 3B and place erosion control blanket on pond slopes.
IL Complete grading seeding, and mulching ofall disturbed areas to include access
road.
13. All disturbed areas must be planned or provided with protective cover within 15 days.
14. Maintain erosion central devices throughout project and after all runoff -producing
rairs.
15. Ifsalimmt is fowl to leaving constructionsite, take ieliatenneasoes toconact
situation and notify project engineer
16. After construction is complete and all anal stabilized, call fa an onsite inspection
by sediment and erosion control officer./
17. Once site is approved, remove silt fence, rock silt sans, and anyother terporary,
measuresardscedtesmgdishrfiadareas.
Maintenance Plan
1.All erosion end sediment control practice will be checked for stability and operation
following every runoff -producing minfall but in no case less than once every wok, Any
needed rejoins will be mad, immediately to maimsin all practices ss designed.
2, The sediment basin will be cleaned our when the level of sediment reaches 3 It below the top
y... .•:'-,t�'+�
w <R i� t
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to
tL s
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Q.O as
QjW ' 1 UI -
O V N 2
t z r
—
o
m ;;
O N a
n
OI
®
/ / / I
of the weir spillway. Gravel will be cleaned or replaced when the sediment pool no longer
drains properly.
20
1
PROPOSED I 1
40' X 25' WIDE I
PROPOSED 1
SECONDARY SILT FENCE 1 ❑
CONSTRUCTION \I 1
o ENTRANCE FOR ❑
_ -- LI: BT VEHICLES 20• ••.,- E
PROPOSED
I L-� LIMITS OF
PROPOSED POND CONSTRUCTION
SILT \ PROPOSED
FENCE \ 20' WIDE SOIL \.
w N ACCESS ROAD 0' c
y',�
r+
3. Sediment will be removed from behind the sediment fence when it becomes about 0.5 0 deep
don e fence. The sediment fence will will be repaired as necessary to maintain a barrier.
4. Al l seeded areas will et feveplan reseeded ss necessary, and mulched according to
spceifiwtions in the vegetative planmmaintain avigorous,dense v<gemtiv<wver.
5. Gravel for rock check dams will be clemed or ¢placed when the water no longer drains
properly. Sediment will be removed from behind the dams whet it becomes approximately 0.5
ftd
deep.
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Y
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ujuc
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Z
0
Z
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W
END SL/\WALE 38 1 i EXISTING SOIL ROAD . •
O
N
(} L-\___ III .--._.- - -._-
PROPOSED
SWALE 36
/ 60; m ��- �1
SILT � `�� START SWALE 316
�\ \\ \ w L�
II FENCE I CONSTPROPRSEDUCTION
1 t I LIMITS OF PROPOSED \'�� If
1 ROCK SILT ��
/ l SCREENS x •, _ t.- --------
1 ,I ISEO \ `� •-
" 'SILT PENCE S S
I
I
I �_
L_
0 50 100 150 200
l
II
n.
N ER 2005
swxrn:
oc"on.,
XSL
°x"""'
DFV!
cncc.ro:
KSL
�
s
k�
AS INDICATED
o.
PROPOSED SUTTON WET POND EROSION CONTROL PLAN
BAR SCALE
2
or: 5

+yj
It
11
PROPOSED 20D LF
/
\\
I
18" PVC SOR 21
/
\
h
' • __- - -
FORCE MAIN
__WI
TE OAK ROAD
'l
,�
;�
W/ MIN. 3• COVER
AT FINAL ELEVATION FUTURE WHITE
------
.. -� ------
AK ROAD
--
— -- -
-
PROPOSED
_ ___________________
\ \
PROPOSED 48 LF OF
48' RCP FLARED
CONSTRUCTION ENTRANCE
\/
\\ �1\
ION
END SECTIONS
II
52
/
FUTURE PAVED ROAD
\
INVERT IN: 51.1'
I
\ 50
/I
///�\//J
\
INVERT OUT: 50.9'
III
\
PROPOSED SUTTON PLACE V
\ \
NG
II
\
STORMWATER WETLAND
(6324 CY CUT)
\ \
RIPRAP
\\
\\
DISSIPATOR #2
1
Iljl
11
50
49
EXISTING
O\
FUTURE PAVED
PROPOSED
CONTOURS
Z\\
II
V
6
CONTOURS
\ 1
Ili
ii
\\rnI
1
II
Ij
PROPOSED
1 O 11
I,I
ROCK SILT
IZ11
SCREEN
I
\CLASS 'B• \
RAP
PROPOSED SPILLWAY
ELEV: 52.0'
37-X14' (ARMORLOC -
BLOCK 13510 OR EQUAL)
SEE DETAIL ON THIS SHEET
I I
I
' I
I II
I
II �I
REPLACE EXISTING 24'X36'
CULVERT W/ 40 LF
48'0 RCP
W/ FLARED END SECTIONS
INVERT IN:1
INVERT OUT:: �/\ 47. 47.8' i�
I ,
PROPOSED RIPRAP
DISSIP/AT/OR g3//Ir /
I / 1
6 '
b =F1
ED 50 LF
MAIN
EXISTING SAN. SEWER
FORCE MAIN a
BEGIN
SWALE 3B
PROPOSED
ROCK SILT
SCREEN
PROPOSED RIPRAP I 2-PROPOSED 48 IE
L
DISSIPATOR JI I 1 30"RCPS WITH FLARED
3+00 4,
I 11 END SECTIONS AT BOTH ENDS
ao /
( ` \166 �\
EXISTING \ $
DRAINAGE REMOVE EXISTING 48 LF 18' RCP \`�����
DITCH AND CONCRETE HEADWALLS �` \
SWALE 3B
3EC
3B
PROPOSED
ROCK SILT
SCREEN V
e,$
65
60
EXISTING
GRADE
FILL IN EXISTING
ADJACENT DITCH, TYP.
55
PROPOSED--___-
SUTTON PUCE
STORMWATER
WETUND
`
19%
0.11
53.25
50
ELEV: 52.0'
CENTERLINE
OF PROPOSED
2- PROPOSED 48 LF
30' RCPS WITH FLARED
END SECTIONS AT BOTH ENDS
INVERT IN: 53.0'
INVERT OUT: 52.8'
45
SWALE 3B
(SEE DETAIL)
40
35
30
25 0 50
21—
25
HORIZONTAL
VERTICAL
SCALE IN
FEET
F F 7
GROVE CIR
o e
EXISTING DITCH
TO REMAIN
� 1
L— J
END SWALE 39
TIE TO EXISTING DITCH
II \
ARMORLOC BLOC
#3510 OR EOUA
- CUSS B
RIPRAP
PLAN
ELEV: 54.0• 66'' - —
25- SPILLWAY —y- '' y
ELEV: II .0'
1
ELEV: 52.0 13
ARMORLOC BLOCK
SECTION
VIEW A —A
13510 OR EOUAL
CUSS BJ
RIPRAP
ARMORLOC BLOCK
83510 OR EQUAL
PROPOSED FAIRCLOTH FLOATING
W/ 4- HEM AND 3.65 OPENING
10' -t 110 --r 20c-1-v'
SECTION VIEW B-B
SPILLWAY DETAIL
MS
CUSS B '\- INVERT: 50.0'
RIPRAP
48 LF 4'0
SCHEDULE 40
INVERT IN: 50.0•
INVERT OUT: 49.5'
I
I
1
1
1
1
r4
Y
Q
H
aN
NOVEMBER, 2005
oEscNEn:
KSL
Dv ,
DFW
CNECMED:
KSL
ut:
AS INDICATED
SMH NO.
3
7+00 8+00

PERMANENT SEEDING SCHEDULE
PERMANENT SEEDING MIXTURE WITH NURSE CROP
SPECIES RATE (LB./ACRE) DATE
TALL FESCUE & 80 FEB 15 - APR 30
ANNUAL RYE (GRAIN) & 25 OR
PENSACOLA BAHIAGRASS & 50 SEPT. 1 - OCT 31
KOBE LESPEDEZA 40
TEMPORARY SEEDING MIXTURE
SPECIES RATE (LB./ACRE) DATE
ANNUAL RYE (GRAIN) & 120
KOBE LESPEDEZA 50 DEC 1 -APR 15
GERMAN MILLET 40 APR. 15 - AUG. 15
ANNUAL RYE (GRAIN) 120 AUG 15 - DEC 30
NOTE:
TEMPORARY SEED MIX SHALL BE USED FOR ALL AREAS EXPOSED GREATER THAN ONE WEEK
AND SUBJECT TO FURTHER DISTURBANCE. PERMANENT SEED MIX SHALL BE CHECKED FOR
ADEQUACY ON JULY 15.
SOIL AMENDMENTS (TILLED TO 6" DEPTH PRIOR TO SEEDIN
APPLY AGRICULTURAL LIMESTONE - 2 TONS/ACRE
APPLY FERTILIZER AT A RATE OF 1,000 LB/ACRE (10-10-10).
MULCH
MULCH - 2 TO 2 1/2 TONS/ACRE - SMALL GRAIN STRAW OR EQUIVALENT COVER.
ANCHOR - ASPHALT EMULSION ON SLOPES. 0 430 GAL./ACRE (TYPE R.S.)
MULCH ANCHORING TOOL SHALL BE USED ON ALL OTHER AREAS.
MAINTENANCE
REFERTILIZE IN THE SECOND YEAR UNLESS GROWTH IS FULLY
ADEQUATE. MOW TO 3" HT. WHEN AVERAGE HT. OF GRASS BECOMES 5".
RESEED, APPLY SOIL AMENDMENTS AND MULCH DAMAGED OR DEAD AREAS
IMMEDIATELY.
SWALE DESIGN DETAIL
c�
Z Z SWALE B Z S L LINNING
3-8 1 6• 1 3' 1 VAR. 1 678' ECB
B = WIDTH OF SWALE BOTTOM
Z = SLOPE OF SWALE SIDES
S = SLOPE OF SWALE BOTTOM ALONG LENGTH
L = LENGTH OF SWALE
ROP AT 1.5%
3I
RIP —RAP DISSIPATOR
N.T.S.
DISSIPATOR
L
I WI
I W21
TFICKNESSI
RIPRAP CUSS
p
10'
8•
12•
18'
8
6•
12'
18'
8
/3
10•
6•
12•
18
B
RIPRAP
ISOMETRIC VIEW
■71�T1�[--AS REQUIRED
�
•
T K71_IIK1IeSIf: .�� I/.I'S
FLARED36"J SECTION A —A FILTER BLANKET
RCP PIPE END OUTLET DETAIL
sloE
BOTTOM WIDTH
SLOPE
(MAX-3
SWALE
DEPTH
SEED AND
MULCH SHOULDER
AND SWALE
SEED & MULCH GRASS SWALE
BOTTOM WIDTH
SIDE
SLOPE
(MAX.3)
FUTERRA F4 NETLESS �1 •=. UNING
BLANKET OR -... DEPTH
APPROVED EQUAL-
OVERLAP AT SEAMS
"""'•' ••"""' WRIOR TO INSTALLING BLANKET.
EROSION CONTROL BLANKET (ECB)
NOTE: PREPARE. SEED AND INSTALL TEMPORARY UNING
ON DISTURBED AREA OF DITCH.
SWALE LINING DETAILS
NOT TO SCALE
STANDARD STRENGTH FABRIC
SUPPORTED WITH WIRE
MESH WITH POSTS B' O.C.
-OR-
EXTRA STRENGTH FABRIC
WITH POSTS 6' O.C. pOSTS OF EITHER
4'0 PINE.
2*0 OAK. OR
COMPACTED BACKFlLL 1.33 //FT STEEL
OR GRAVEL
FLOW
EXTEND FABRIC AND
PARE INTO TRENCH
SILT FENCE DETAII
N.T.S.
NOTES:
I. REMOVE ANY SEDIMENT GREATER
THAN 12" DEEP. REPAIR ANY
UNDERMINING IMMEDIATELY.
0
KSL
puma:
acam: DFW
0
W
V1
O
D-
0
of
D_
SWALE DETAIL
N.T.S.
5

M is
STORM WATER IMPROVEMENTS
TASK 4
PARK POND DITCH
TO SERVE THE
TOWN OF LAKE WACCAMAW
COLUMBUS COUNTY, NORTH CAROLINA
MAYOR
COMMISSIONER
COMMISSIONER
COMMISSIONER
TOWN CLERK
JOB SITE
LAKE WACCAMAW
VICINTY MAP
Lake Waccamaw — Columbus County, North Carolina
— D.B. GOLDSTEN, JR.
— HUBERT EARL HARRIS
— BOBBY R. TEDDER, JR.
— IVAN WILSON
— LINDA NOBLE
PLAN SHEET INDEX
1. COVER SHEET
2 EROSION CONTROL PLAN
3. PLAN AND PROFILE
4. DETAILS
5. DETAILS
a Es5(y
°P 5E W
onxz
It-10-w
® HOBBS, UPCHURCH & ASSOCIATES, P.A.
CONSULTING ENGINEERS
SOUTHERN PINES, NORTH CAROLINA 28387

LEGEND
t �
\e-'�Ikh
PROPOSED PROSIILTTPFENCOE PROPOSED
K SILT ROCK SILT
�'SREEN--AND LIMITS OF SCREEN� v f CONSTRUCTION I n� II
j PROPOSED PRO
I SILT FENCE DRAT
AND UMITS OF SEE
I CONSTRUCTION
EXISTING
DITCH
PERMANENT SEEDING SCHEDULE
UPLAND PERMANENT SEEDING MIXTURE WITH NURSE CROP
SPECIES RATE (IB./ACRE) DATE
TA"- FESCUE k a0 AUG 20 - OCT 25
SERICEA LESPEOEZA 25 OR
NDBE LESPEDEU w oa I -APR IS
TEMPORARY SEEDING MIXTURE
SPECIES RATE (IB./ACRE) DATE
ANNUAL mE (GUN) k 120 OEC I - ON 1S
NOW I£SPEDEu 50
GERMAN MILLET w OR. 15 - AUG. 15
µNUI1 RYE (GRAN) 120 AUG 15 -DEC b
NOTE:
ODOG IFY SEED MIX SHALL BE USED FOR AIL µEAS EXPOSED GREATER THAN WE WEEK
µ0 WWECT TO FIRMER 05NRBWCE. PERLLWENT SEED NIX SI BE CHECKED µO
RE -SEEDED AS NECESSARY WRWC I YEAR WARRANW.
SOIL AMENDMENTS (TILLED TO 6" DEPTH PRIOR TO SEEDING)
APPLY XCRICULTUM. UMESTONE - 2 rONS/ACRE
MPLY FEROUZER AT A RATE OF 1.000 IB/ACRE (10-10-10).
WUH
MULCH - 2 TO 2 I/2 mNS/ACRE - SMNL OUR STRXW OR EWNµFNT COVER.
ANCHOR - ASPHALT EMULSION ON SLOPES. O 130 W /ACRE (TYPE R.S.)
MULCH ANCHORING TWL SHAIL BE USED ON A OTHER AREXS.
WETLAND / POND BANK SEED MIX
FOX SEDGE
SOFT CUSH
SWITCH CRASS
OR MPROVED NATIVE SPECIES EQUAL
MIXES XND RATES AS PER wWUFALNREN'S / MIXERS INSm"ONS.
=3Ab A11HOS
I I
TREE
- —
-EXISTING SEWER FORCE MAIN
I
UTIUTY POLE
---O--EXISTING
GRAVITY SEWER
—x—
FENCING
O
UGHT POST
O
WATER METER
T,E
HYDRANT
m
TELEPHONE PEDESTAL
WATER VALVE
O
MAILBOX
IW
STORM WATER FLOW DIRECTION
II I
I
II
I 6S
i to I I I
C I PROPOSED
PROPOSED\ m SILT FENCE
ROCK SILT _�/ $ r _
SCREEN
r-rr m I I I • _•.. X i
PROPOSED 20 LF
24"0 RCP R-15)
1
II II
W/ FLARED END III
SECTIONS
I
;I IIL
INVERT IN: 54.5'
INVERT OUT: 54.4'
I/I
!III
PARK POND DITCH EROSION CONTROL PLAN
Maintenance Plan
PROPOSED
PARK POND
CONTRACT
6S� _
IfN=�S�J)F-===_________-----====gs----------_-__ --__--
_ o __
— —��
8S I-------------------6S--- _
PROPOSED --� �6S—��— — — — — — — —
2— 120 LF 48"0 RCPS
W/ FLARED END SECTIONS
INVERT IN: 53.0'
INVERT OUT: 52.7'
6S! ra
1. All erosion and sediment control practices will be checked for stability and operation
following every mnoff-producing rainfall but in no case less than once every week. Any
needed repairs will be made immediately to maintain all practices as designed.
2. Sediment Will he removed from behind the sediment fence when it becomes about 0.5 0 deep
at the fence. The sediment fence will be repaired as necessary to maintain a barrier.
3. All seeded ..as will be fcrilized, reseeded as necessary, and mulched according to
specifications in the vegetative plan to maintain a vigorous, dense vegetative cover.
4. Gravel for rock check dams will be cleaned or replaced when the water no longer drains
properly. Sediment will be removed from behind the dams when it becomes approximately 0.5
0 deep.
Constnrction Schedule
1. Obtain copy of approved plan and applicable permits.
2. Flag the limits of construction and tree protection areas.
3. Construct temporary Construction entrances/exits.
4. Install erosion control silt fencing.
5. Clear and grub project site.
6. Install double culvert and repave road.
7. Construct ditch east of Columbia Ave. and install rock silt screens.
G
0
8. Seed side slopes and overlay with erosion control blanket (EC I). W 4
Q
9. Construct outlet riser and spillway and tie into existing pond. �i I
a
10. Graded slopes and fills am to be planted or provided with protective cover under Qfy
vegetative stabilization as noted in the plans and specifications. All areas upon which ov
F9no further land disturbing activities will be undertaken are to be planted or provided V)
with a protective cover within 15 working days.
11. When the average height of turf in the area becomes greater than 5 inches, mow to
a 3-inch height.
12. Maintain erosion Control devices periodically and after all runoff -producing rains.
13. When construction is complete and all areas stabilized, call for an onsite
inspection by the sediment and erosion control officer.
14. Once the site is approved, remove temporary measures and seed remaining
disturbed areas.
D.HOVE
orscxr0:
Do.
cHECKEo.
ac.LE:
AS
SHEET NO,
15. When vegetation is established, call for final site inspection
2
C z
og
oa
z J
aBE
rE
Y
Z
Q O
d O
0 z
W O
aOf
K W
a

s
o_
e
NOTES:
i.) THE CONTRACTOR SMALL CONTACT THE POWER CO., GAS
SEWER (INCLUDING FORCE MAINS) AND WATER MAINS, AND 3.) THE
RIGHT-OF-WAY OR SHOWN TEMPORARY CONSTRUCTION
LEGEND
CO., AND TELEPHONE CO. FOR THE EXACT LOCATION OF
10 FEET HORIZONTAL SEPARATION BETWEEN SANITARY SEWER EASEMENT SHALL DICTATE THE LIMITS OF CONSTRUCTION.
ALL UNDERGROUND MAINS, CABLES, OR LINES BEFORE
(INCLUDING FORCE MAINS) AND WATER MAINS. IF THESE p) THE
CONTRACTOR
TREEMAIN
E — — —EXISTING SEWER FORCE
TY POLE --O--EXISTING GRANTY FORCE
CONSTRUCTION BEGINS.
.
SEPARATIONS CANNOT BE MAINTAINED, DUCTILE IRON PIPE
SHALL BE
RESPONSIBLE FOR THE
—
w
x— FENCING LIGHT POST
g
G
WILL BE USED 10 FEET EITHER SIDE OF CROSSING AND COORDINATION OF THE ADJUSTMENT OF EXISTING UTILITIES, m WATER METER U HYDRANT
2. PIPE SEPARATION: THE FOLLOWING MINIMUM PIPE SEPARATION
INCLUDING
ALONG ENTIRE LENGTH OF LINE LESS THAN 10 HORIZONTAL
POWER POLES.
m TELEPHONE PEDESTAL WATER VALVE
0
z
4
WILL BE MAINTAINED: 12 INCHES VERTICAL SEPARATION
FEET FROM WATER MAINS. THE CONTRACTOR SHALL RECEIVE 5.) THE
CONTRACTOR SHALL REMOVE AND REPLACE ANY EXISTING
© MAILBOX
a
n
BETWEEN CROSSING OF SANITARY SEWER AND STORM SEWERS APPROVAL FROM THE ENGINEER IN THE FIELD BEFORE PAYMENT
HEADWALLS, AS REQUIRED FOR THE CONSTRUCTION OF THE
a STORM WATER FLOW DIRECTION
18 INCHES VERTICAL SEPARATION BETWEEN CROSSING OF
WILL BE MADE AT DUCTILE IRON PRICES. PROJECT.
I
I V
I
I
I I
I I
1
6s
3
-
'�_--
I'
I OPEN CUT AND
C.,ASPHALQ
I
PATCH 1
PAVEMENT I O
I1
36" CMP RISER
W TRASH RACK
/
I v & 6- 4" HOLES
I
.," ..... ......... ..
..... ..�-��
f•:,
bpi �n
\111 O
PROPOSEDRIPRAP---TIE
TO EXISTING
� m
J D
"
DITCH ® ELEV: 52.0' j
I PROPOSED
I
_ — —•
•
1 RIPRAP
_
a
4) 2 a ^
MA NTESNCE
oAN
�\\� •—.—•—•—•—. .—.—•—.—.—.—.—.— —.—
PROPOSED PARK POND �F �—'—'—'—'—'—•—•—• •— —
F NOT IN THIS
CONTRACT 6S
0.f U
I
- "-� c*>Fr'.`g=":UuTi. _
?; o
DRAINAGE DITCH CENTERLINE
II
_..._.
II II
?: .rA.; ,?5 ;.xgrm..;.;,,F-.q.1, ,L r• T,JyR, .+-R,:+.u:;w'x 1.:':�1
w c
SEE DETAIL SHEET II
III I
I II rFF -- ---
--
HS— --- _ -
Q _
REUSE EXISTING 24"0
-- __
-- -----�_"-
e
�w I I d4
\U
—�
CORRUGATED ALUMINUM PIPE
I TO LENGTH
_ - - - 69- - - — --___
\6�'' _---_
e
EXISTING
DITCH 1\\11
III
11� %)
I� I� _—CUT
III PROPOSED AS REQUIRED
\p\ 1
II I
I
2— 120 LF 48"0 RCPS
1\U 1
\\\UI
)I
I I/I
III W/ FLARED END SECTIONS
III
C fi
li
INVERT IN: 53.0'
INVERT OUT: 52.7'
13
PARK
POND DITCH
69
S m o
o
c Na
2 0
70
70
65
65
EXISTING
GRADE
EXISTING
36" CMP RISER
60
DITCH
W/ TRASH RACK
& 6— 4" HOLES
60
— _
—
—
— —
ZI_ Q
t
55
55
wo
>Z O
O J
as 3
0. w
a
50
INVERT:
50
—y Y
�Q g
YQ_' O
Q Z
CENTERLINE AT BOTTOM
INVERT:
INVERT:
53.1'
OF PROPOSED
TIE TO EXISTING
PARK POND DITCH
52.7'
53.0'
INVERT:
Wa
Q 1,_
I
a Q
a 2
4rJ
DITCH ® ELEV: 52.0'
PROPOSED
RCPS
53.0'
REUSE
CORRUGATED
EXISTING 24"0
ALUMINUM PIPE
45
3 O
md' Z
0 g
O a
-2-48`0
W/ FLARED
-CUT
TO LENGTH
�Y 3
p
END SECTIONS
AS
REQUIRED
40
oQ Or
Q'~
d
40
SWALE DESIGN DETAIL
CX CX
35
z a
m N c
35
�NOVEMBER, 2005
ors1cxm:
V 41'
Z �Z SWALE B Z
d PARK POND
DITCH 8 3'
S L
.001 702'
KS
30
30
worm:
DEW
0 50
cnEcxeo:
KSL
B = WIDTH OF SWALE BOTTOM
Z = SLOPE OF SWALE SIDES
3
ERTICAL
scue.
AS INDICATED
HORIZONTAL
serer No.
3
25
S = SLOPE OF SWALE BOTTOM ALONG LENGTH
L = LENGTH OF SWALE
25
SCALE IN FE
T
0+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00
8+00 9+00 10+00
11+00
12+00 13+00
or 5

14' WIDE X 70• X 4" THICK
PARK PON I i I\ // ' ' ARMORLOC BLOC SPILLWAY
DITCH I I ��/ I � RIPRAP .., 57
77777
1 FUTURE
PAVED ROAD
I f 1 X PROPOSED I
�— \ \II 1 i I 1 48'0 RCPS ' /
INVER
52.7•
PROPOSE0. X
10' WIDE X
MAINTENANCE
ROAD
PROPOSED
TEMPORARY
CONSTRUCTION
ENTRANCE
W/ FLARED
END SECTIONS
NA�NEIr%/l/%/
�■■II
Fill ROPO .
Poll
I � MAINItNANCt KOAU-
1 I I X OT IN THIS CONTRACT 53.0 :
jI zs�t4 av�°,- °�• � n'e`:.j..,x`5w � s _ � V
4
:• t�„�1,; d'�AND CUT TO LENGTH
71/E/XISpTloNG
° 4'1E.
X CONSRUCTION /
% I I II II I�,II ENTRANCE
EXISTING I �I /
PAVED ROAD— / I
COLUMBIA AVE. 1 I
PLAN VIEW
POND
/r INVERT 53.1•
052
36"o CMP RISER
\W/ TRASH RACK
k 6— 4'0 HOLES
EXISTING PAVED ROAD—
REUSE EXISTING 24'0
COLUMBIA AVE.
14' WIDE X 70• X 4" THICK
CORRUGATED ALUMINUM PIPE
ELEV AT CENTER: 58.5'
301 ARMORLOC BLOC SPILLWAY
f AND CUT TO LENGTH
PROPOSED PROPOSED
SLOPE
AS REQUIRED
PROPOSED PARK POND DITCH
48"0 RC PS GRADE
36"m CMP RISER
W/ TRASH RACK
TYP. OF 2
9' 10• t 9.
�& 6— 4"0 HOLES
� I
PARK
�— 10• --I _
• -.: nelrlN 1 IWiBMMWJ®Bi NF NOIm
.•�"m• . ,� BOTTOM
BOTTOM
INVERT: 31
4' X 5' X 1/4"
INVERT;
53.0• SLOPE 31
STEEL PLATE
52.7•
PROPOSED CONCRETE SLOPE
WELDED TO BOTTOM
ANTI —SEEP COLLARS
EDGE OF RISER
RISER TO BE SET IN
4•x5•x12" THICK
CONCRETE SLAB
SECTION VIEW
OUTLET RISER AND PARK POND DITCH DETAIL
25 O 50
SCALE IN FEET
Z
v r NO.
4
W
0
O
a
O
CL
a

WIDTH
NOTES:
TYPIC
LA FRRII
SECO
ISOMETRIC VIEW
RIPRAP
.�
➢'�TFII'`I�RIICR'.I��\\
11=11-II=71�T:::>:: �S>i:.:::::5: •.:=fr=51�71=
AS NE R
CTI
-SEX.
a IX;
RCP PIPE FLARED END OUTLET DETAIL
N.T.S.
NOTE
USE CLASS B STONE FOR
STRUCTURAL STONE AND
PAY FOR AT THE CONTRACT
UNIT PRICE PER TON STONE
FOR EROSION CONTROL,
CLASS B.
USE NO. 5 OR NO. 57 STONE
FOR SEDIMENT CONTROL AND
PAY FOR AT THE CONTRACT
UNIT PRICE PER TON SEDIMENT
CONTROL STONE.
CONSTRUCT DAM A
MAXIMUM OF 1 FT. ABOVE
NORMAL FLOW DEPTH.
TOP OF wu J j
I
NOTES: APPLICABLE AT ALL POINTS OF
INGRESS h EGRESS UNTIL SITE IS
STABIUZED, FREQUENT CHECKS OF
THE DEVICE AND TIMELY
_ MAINTENANCE MUST BE PROVIDED.
CONSTRUCTION ENTRANCE NOTES
a. GRAVEL PAD TO BE 15'. 50' AND 6' THICK MINIMUM
5. TURNING RADIUS SUFFICIENT TO
ACCOMMODATE LARGE TRUCKS IS TO BE
PROVIDED.
c. ENTRANCE(S) SHOULD BE LOCATED i0
PROVIDE FOR MAKIMUM UTIUTY BY ALL
CONSTRUCTION VEHICLES.
E. MUST BE MAINTAINED IN A CONDITION
WHICH WILL PREVENT TRACKING OR
DIRECT FLOW OF MUD ONTO STREETS.
PERIODIC TOPDRESSING WITH STONE
WILL BE NECESSARY. KEEP SOME HANDY.
e. ANY MATERIAL WHICH STILL MAKES N
ONTO THE ROAD MUST BE CLEANED UP
IMMEDIATELY.
TEMPORARY CONSTRUCTION ENTRANCE
NOT TO SCALE 3 REQUIRED
I
I XAse or aTAMM Ji
TOP VIEW
TOF OF wrt
11-6. MIN. 1rp
I lr
S•YPII.
HEOIYEXi IXMRd rt.E / aiPFIY lEO ��
.N.. XTONE V-6" MIN.
CROSS SECTION
ROCK SILT SCREEN DETAIL
N.T.S.
FRONT VIEW
4" NATIVE TOPSOIL RESTORED
TO ORIGINAL GRADE AND SEEDED
WITH WETLAND SEED MIXTURE.
IN UNDEVELOPED AREAS BACKFILL
REMAINING PORTION OF
TRENCH IN MAX 12' LIFTS
TO 95% MAX DENSITY.
1. EXISTING TOPSOIL SHALL BE REMOVED
STOCKPILED AND PROTECTED FROM
CONTAMINATION AND SHALL BE
REPLACED AS TOPSOIL AFTER UTILITY
INSTALLATION.
2.
I BACKFILL TO 18" ABOVE PIPE
li FOR A LENGTH OF 12" WITH
18" MI III I I B LOW OR WITH WITSS 8 NSPIAPERMEABLE CIFIED 3.
Ih: / CLAY HAVING A SPECIFIC DISCHARGE OF
UNDISTURBED ��� 4 II 1 X 105 CM/SEC OR LESS.
SOIL /
ANTI SEEP COLLAR SHALL EXTEND
/ MIN. TU ABOVE THE PIPE, 6"
12" MIN 7, -.: r: INTO UNDISTURBED TRENCH WALLS
_ _ EACH UNDISTURBED
AND 12' INTO UNDISRBED
=� ,j �=I�I �� I( TRENCH BOTTOM.
SHALL NOT BE INSTALLED
COLLAR IS LOCATED.
CLASS B CONCRETE SPECIFICATIONS
A
MINIMUM CEMENT CONTENT, SACKS PER
CUBIC YARD WITH ROUNDED COURSE AGGREGATE
5.0
R
MINIMUM CEMENT CONTENT, SACKS PER
CUBIC YARD WITH ANGULAR COURSE AGGREGATE
5.5
C)
MAXIMUM WATER -CEMENT RATIO GALLONS
PER SACK
6.8
D)
SLUMP RANGE
2" TO 4"
E)
MINIMUM STRENGTH - 28 DAY PSI
2.500
TRENCH NOT IN ROAD
FOR DOUBLE PIPE
SECTIONS MAINTAIN
12' MIN, SEPARATON
BETWEEN 0.0. OF
PIPE (TYP.)
SELECT BACKFILL
COMPACTED TO 98%
DENSITY PLACED IN
6 LIFTS UNDER
ROADS AND 12' UFTS
COMPACTED TO 90%
DENSITY ELSEWHERE
ANTi—SEEP COLLAR DETAIL
N.T.S.
TRENCH IN ROAD
DOT APPROVED BITUMINOUS
CONCRETE SURFACE COURSE
WHERE REWIRED TO MATCH
EMSRNG
Iz•
10" AGGREGATE BASE
COURSE COMPACTED
TO 98% DENSITY IN
ALL ROADS
SELECT COMPACTED
GRANULAR BACKFILL
PLACED IN 6" LIFTS
OEP
1+
MAX.MA%.
3/4".0.
<- ':
1
> 1�:
1/3 PIPE O.D.
1/2 PIPE DO.
GRANULAR BEDDING
MATERIAL
DEPTH:
' :
..
<- 14':
1/4 PIPE O.D.
4'
> 14':
O.
1/2 PIPE D.
Llr
12'
0.POFF
OmOI
12"
MIN.
PPE
PIPE BEDDING, OPEN
CUT AND
PATCH
N.T.S.
ANTI -SEEP COLLAR SHALL BE PLACED AT THE
DOWNSTREAM WETLAND BOUNDARY AND A
MIN. SPACING OF 150' UP THE GRADIENT UNTIL
THE UTIUTY EXITS THE WETLAND BOUNDARY
UNLESS INDICATED OTHERWISE ON THE DRAWINGS
ANTI -SEEP COLLARS MAY BE CONSTRUCTED WITH
COMPACTED CLAY, CLASS B CONCRETE, PVC
OR METAL COLLARS. WETLAND CROSSINGS THAT
ARE DIRECTIONALLY DRILLED AND PERPENDICULAR
WETLAND CROSSINGS THAT ARE OPEN CUT AND
LESS THAN 150' IN LENGTH DO NOT REWIRE
ANTI -SEEP COLLARS.
4. CONTRACTOR SHALL PROVIDE SUITABLE
FORMING (TO BE REMOVED) TO CONTAIN
CONCRETE FOR PROPER SHAPE AND
DIMENSIONS.
5. ANTI -SEEP COLLAR MATERIAL AND
INSTALLATION SHALL BE APPROVED BY
THE ENGINEER PRIOR TO PLACING AND
PRIOR TO BACKFIWNG.
6. CONSTRUCTION AND SEEDING IN WETLAND
AREAS SHALL BE IN ACCORDANCE WITH
STATE AND FEDERAL REGULATIONS AND
THE OWNER'S PERMIT REQUIREMENTS.
SIDE BOTTOM WIDTH
SLOPE r,N+%'Wi1iI'k-
(MA% 1
BWALE DEPTH SEED AND
MULCH SHOULDER
AND SWALE
LINING WIDTH
SEED & MULCH GRASS SWALE
BOTTOM WIDTH
SIDE
ROPEFUTERRA A rMAnNAWI_
BLANKET F4 NETLESS 1 DNING
BLANKET OR
OVERLAP
EQUAL- DEPTH
SEED AND
OVFPLAP AT SEAMS -� .��-- �' MULCH SHWLOER
STAPLES 2' O.C. SEED DISTURBED AREA AS PER
BOTH 01RECTIONS UNINC WIDTH PLANS ANO SPEOFlCATIONS
PRIOR i0 INSTAWNC BLANKET.
EROSION CONTROL BLANKET (ECB)
NOTE: PREPARE, SEED AND INSTALL TEMPORARY UNINC
ON DISTURBED AREA OF DITCH.
SWALE LINING DETAILS
NOT TO SCALE
0
Z
O
o_ rn
Y Q
a0AT
0
OE9GiED.
KS
Oflnvm;
DEW
CNECXTR
KSL
scut:
AS
INDICATED
sHaT NO.
5
IE
5 —

EROSION CONTROL PLAN
STORMWATER IMPROVEMENTS
A CONTRACT 2-TASKS 2, 3, 8 4
FOR THE
TOWN OF LAKE WACCAMAW
COLUMBUS COUNTY, NORTH CAROLINA
DECEMBER 2005
RECEIVED
JAN 17 2006
DWQ
Prepared By: -ROJ #
Hobbs, Upchurch & Associates, P.A.
1qj Consulting Engineers, Land Surveyors & Planners
300 SW Broad Street, Southern Pines, NC 28387

r
FINANCIAL RESPONSIBILITY/OWNERSHIP FORM
SEDIMENTATION POLLUTION CONTROL ACT
EXPRESS PERMITTING OPTION
No person may initiate any land -disturbing activity on one or more acres as covered by the Act before this
form and an acceptable erosion and sedimentation control plan have been completed and approved by the
Land Quality Section, N.C. Department of Environment and Natural Resources. (Please type or print and, if
the question is not applicable or the e-mail and/or fax information unavailable, place N/A in the blank.)
Part A.
1. Project Name Town of Lake Waccamaw Drainage Improvements Tasks 2 3 and 4
2. Location of land -disturbing activity: County Columbus City or Township Lake Waccamaw
Highway/Street SR 1757 & NC 214 Latitude 034 deg 19' 04.5" NLongitude 078dep30'47.0" W
3. Approximate date land -disturbing activity will commence: February 1 2006
4. Purpose of development (residential, commercial, industrial, institutional, etc.): Improve water quality
5. Total acreage disturbed or uncovered (including off -site borrow and waste areas): 9.6 AC
6. Amount of fee enclosed: $ $2 480 The Express Permitting application fee is a dual
charge. The normal fee of $50.00 per acre (rounded up to the next acre) is assessed without a ceiling
amount. In addition, the Express Permitting supplement is $250.00 per acre up to eight acres, after
M which the Express Permitting supplemental fee is a fixed $2,000.00 (Example: 9 acres total is $2,450).
7. Has an erosion and sediment control plan been filed? Yes No Enclosed X
8. Person to contact should erosion and sediment control issues arise during land -disturbing activity:
Name_ Kevin Lindsay E-mail Address klindsav@hobbsupchurch com
Telephone [phone] Cell If [phone] Fax # _(910) 692-4795
9. Landowner(s) of Record (attach accompanied page to list additional owners):
Town of Lake Waccamaw [phone] _(910) 646-3860
Name Telephone Fax Number
PO Box 145 NA
Current Mailing Address Current Street Address
Lake Waccamaw NC 28450
City State Zip
City
State
Zip
10. Deed Book No. NA Page No. NA Provide a copy of the most current deed.
Part B.
1. Person(s) or firm(s) who are financially responsible for the land -disturbing activity (Provide a
comprehensive list of all responsible parties on an attached sheet):
The Town of Lake Waccamaw lakewaccamawl @ncez.net
Name -Address
PO Box 145 NA
Current Mailing Address Current Street Address
Lake Waccamaw NC 28450
City State Zip City
State
Zip

Telephone [phone] Fax Number—[phone]
2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address
of the designated North Carolina Agent:
Name E-mail Address
Current Mailing Address Current Street Address
City State Zip City State Zip
Telephone Fax Number
(b) If the Financially Responsible Party is a Partnership or other person engaging in business under an
assumed name, attach a copy of the Certificate of Assumed Name. If the Financially Responsible
Party is a Corporation, give name and street address of the Registered Agent:
Name of Registered Agent E-mail Address
Current Mailing Address Current Street Address
City State Zip City State Zip
Telephone Fax
(c) In order to facilitate Express Permitting, it is necessary to be abletocontact the Engineer or other
consultant who can assist in providing any necessary information regarding the plan and its preparation:
Hobbs. Upchurch & Associates [e-mail]
Engineering Firm or other consultant E-mail Address
Kevin Lindsay [phone] [phone]
Individual contact person (type or print) Telephone Fax Number
The above information is true and correct to the best of my knowledge and belief and was provided by me
under oath (This form must be signed by the Financially Responsible Person if an individual or his attorney -in -
fact, or if not an individual, by an officer, director, partner, or registered agent with the authority to execute
instruments for the Financially Responsible Person). I agree to provide corrected information should there by
any change in the information provided herein.
0.rre✓\ L. • (,.,�.rr' t? � fJr,J.1 %�%qn�y c v
T o rint nam Title or Authority
Signature Date
a Notary Public of the County of
J
State of North Carolina, hereby certify that appeared personally
before me this day and being duly sworn acknowledged that the above form was executed by him.
Witness my hand and notarial seal, this day of c O �t L 20U 5
Notary
Seal
My commission expires

L
Erosion Control Plan, General
HUA No. LW0301, Stormwater Improvements, Contract 2-Tasks 2, 3, & 4
Town of Lake Waccamaw, Columbus County, NC
OBJECTIVE:
Design erosion control plan for Stormwater Quality Improvements for the Town of
Lake Waccamaw
General: The Town of Lake Waccamaw is making several improvements to existing stormwater
ditches and drainage areas in order to improve the quality of runoff into Lake Waccamaw.
Task 1--A stormwater pond was constructed as part of the Elizabeth Brinkley Park Project.
This contract includes the following tasks:
Task 2: Lane Pond--3.5 acres disturbed
This 1.5 acre pond (normal pool) will receive water from an existing ditch that drains 40 ac.,
store a maximum of 143,976 cubic feet of runoff, and then release this runoff back to
the existing ditch. The pond shall include a forebay and wetland plants along its banks .
The pond has an irregular shape with a flow length to average width of 5:1
The normal pool pond volume is 236,000 cubic feet.
The maximum storage above normal pool is 144,000 cubic feet.
Erosion shall be controlled as per the plans and specifications.
-Erection of tree projection and silt fences.
-Temporary construction entrances.
-Two rock silt screens shall control all runoff from the site as its exits
the site via a ditch on the south side (swale L-1).
-After the site is cleared and grubbed, the pond outlet structure will be constructed.
-The pond shall then be excavated and all excess material hauled and properly disposed of.
-The pond shall serve as a sediment basin storing over three times the required 72,000 cf
-As a sediment pond it will have almost four times the required 0.4 acres surface area.
-Upland grasses shall be planted on exposed areas above 60 feet in elevation.
-Wetland grasses and trees shall be planted in areas between elevation 58 and 60.

Task 3: Sutton Place Wetland and Ditches-4.63 acres disturbed
This .36 acre wetland will receive water from two existing ditches that drain 30 acres,
store a maximum of 55,400 cubic feet of runoff, and then release this runoff back to an
r existing ditch. The wetland shall include a 2,830 sf pool from 1-3 ' deep, a small upland
area, and a mix of wetland grasses and shrubs.
The wetland has a 1.7:1 length to width ratio due to flow coming in from two ditches
Erosion shall be controlled as per the plans and specifications.
-Erection of tree projection and silt fences.
-Temporary construction entrances.
-Clearance of a 20' wide access road w/silt fence along its entire down hill, western length
-After the site is cleared and grubbed, the pond outlet structure will be constructed.
-The pond shall then be excavated and all excess material hauled and properly disposed of.
-Futera F4 Netless blanket (or approved equal) shall be placed on the pond slopes to
elevation 55.
-The pond shall serve as a sediment basin that exceeds the 54,000 cf storage required
-As a sediment pond it will also exceed the required 0.3 acres surface area.
-Upland grasses shall be planted on exposed areas above 53 feet in elevation.
-Wetland grasses and trees shall be planted in areas between elevation 50 and 53.
To further reduce contaminated runoff from the area, the deep narrow ditch coming into
the proposed pond from the west shall be regraded as a grassy swale after the pond is
completed.
Three rock silt screens will be constructed in the ditch and erosion control blankets
placed on the ditch shoulders--Futera F4 Netless blanket (or approved equal) .

Task 4: Park Pond Ditch--1.43 Acres Disturbed
This grassy swale will replace an existing ditch to carry the flow from the Park Pond to
an existing ditch.
Erosion shall be controlled as per the plans and specifications.
-Project limits marked.
-Temporary construction entrance.
-Silt fencing on along entire north, east, and south end of project.
-Site will be cleared and grubbed.
-Double culvert constructed & road repaved.
-Ditch section east of Columbia avenue constructed --with 3 rock silt screens.
-New ditch seeded and erosion control blanket placed.
-New pond outlet structure constructed and stabilized with Class B rip rap.
-Once ground cover is established, proposed ditch connected to pond.
Note, ditch on west side of pond currently serves as pond outlet and will continue
to do so until ground cover is established in new ditch.
u

II
SECTION 1600 EROSION CONTROL - GENERAL PROVISIONS
1600-1 GENERAL
A. The Contractor shall be responsible for conducting his site grading and drainage
operations in such manner as to prevent or lessen excessive soil erosion of the
construction site work areas. He shall at all times provide satisfactory means to .
prevent or minimize the movement and washing of large quantities of soil. The
Contractor is expected to review his site grading and drainage operations periodically
to determine the areas most susceptible to erosion by excessive rainfall and
periodically maintain all installed measures for the project duration. The Contractor
shall correct any deficiencies or problem areas as directed by the Engineer or
NCDENR inspector within 48 hours.
1600-2 CONSTRUCTION
A. The Contractor's attention is directed to the fact that unless exposed earth areas are
properly cared for during construction, they may result in substantial sedimentation
damage downstream from the construction area. He shall at all times provide
satisfactory means to prevent or minimize the movement and washing of quantities of
soil onto pavements or into adjacent ditches, swales, inlets, and drainage pipes, to
avoid the possibility of these structures becoming clogged with soil. If this happen as
a result of erosion at the site of this construction, the Contractor will be required to
immediately provide means for removal of the soil and/or debris from the structures
to restore the proper functioning of these structures. The Contractor shall assume all
responsibilities to the affected property owners for correction of all damages. The
Contractor is expected to review his site grading and drainage operations periodically
with the Engineer with the view in mind of determining the areas most susceptible to
erosion by excessive rainfall and shall take necessary temporary measures in
sufficient time to minimize the washing away of the site soils that would likely occur
before the areas are finished graded, top soiled and planted. The temporary measures
to be provided by the Contractor at the critical areas may consist of, but not limited
to, any one or a combination of the following, or by other approved means selected
by the Contractor.
Interceptor or diversion swales and ditches.
Sowing oats, rye, etc. (for quick temporary cover).
Disking in straw mulch
Ditch checks.
B. If any earthwork is to be suspended for any reason whatsoever for longer than 15
days, the disturbed areas shall be seeded with temporary vegetative cover or
otherwise protected against excessive erosion during the suspended period.
Suspension of work in any area of operation does not relieve the Contractor of the
responsibility for the erosion control and temporary measures will not be considered
cause for a change in the price bid.
C. The Engineer has prepared an "Erosion and Sediment Control Plan Narrative" which
is a part of the approval. The Contractor may not vary from the this plan without
® Town of Lake Waccamaw Stormwater Improvements 1 of 3
Section 1600

Lprior approval of the Engineer. Additional measures may be required to facilitate
particular construction techniques and methods. The Contractor shall not have cause
for additional compensation for additional measures required.
1600-3 MAINTENANCE
A. The Contractor shall inspect and maintain each erosion control measure until the
project is stabilized and accepted. After each significant rainfall, the Contractor shall
remove and dispose of silt accumulation from each individual measure. The
following maintenance may be required to each specific erosion and sediment control
measure:
Silt Fence: Fabric shall be removed and replaced
whenever deteriorated to such an extent the
effectiveness is reduced. The toe of the
fabric shall be buried a minimum of 6
inches.
Gravel
Construction
Entrance/Exit: Periodic top -dressing with two inch (2") of
graded stone. Remove all objectionable
materials spilled, washed or tracked onto public
roadways.
Sediment
Basin: Remove sediment and restore Basin to
original dimensions when silt reaches
Elevation 51.5. Ensure a marker is placed at
that elvation to easily determine if basin
needs to be cleaned.
Check
Dams: Remove sediment when it reaches half of
dam height and restore original grades.
® Replace contaminated gravel facing if
required.
Rip -Rap: Make repairs to dislodged stone and/or
supplement as required if erosion occurs
during heavy rainfalls.
1600-4 REMOVAL
A. After the area has been stabilized and the project accepted, the Contractor shall
remove all temporary erosion and sediment control measures. Silt fences shall be
removed, sediment traps/pits and/or basins filled with suitable soil, compacted and
seeded. The materials removed shall remain the property of the Contractor and shall
Town of Lake Waccamaw Stormwater Improvements 2 of 3
Section 1600

be disposed of off -site, or may be reused in other locations if approved by the
Engineer.
1600-5 MEASUREMENT AND PAYMENT
® A. Measurement and payment for the following
items will be based upon actual
quantities installed. All other erosion
control work will be included in the lump sum
bid for earthwork.
Sediment Basin Riser Structure
Each
Gravel Check Dams
Each
Gravel Construction Entrances
Each
Tree Protection Fencing
Linear Feet
Silt Fencing
Linear Feet
Excelsior Matting
Square Yard
I■
® Town of Lake Waccamaw Stormwater Improvements 3 of 3
Section 1600

SECTION 1660 SEEDING AND MULCHING
1660-1 DESCRIPTION
The work shall consist of seeding and mulching. All disturbed areas.
1660-2 GRADING
Rough grading shall be done as soon as all excavation required in the area has been
backfilled. The necessary earthwork shall be accomplished to bring the existing ground to
the desired finish elevations shown on the Contract Drawings or otherwise directed.
Fine grading shall consist of shaping the final contours for drainage and removing all
clumps of earth and waste construction material. It shall also include thorough loosening of
the soil to a depth of 6 inches by plowing, discing, harrowing or other approved methods
until the area is acceptable for subsequent seeding operations.
1660-3 TOPSOIL
After the subgrade has been fine graded to the satisfaction of the Engineer, previously
stodkpiled topsoil shall be spread over the area to a uniform depth and density. The soil
shall be uniformly compacted by a light roller to a depth not less than 4 inches, unless other
depths are shown on the plans. When finished, the surface shall conform to the finished
grade shown or required and shall have a smooth pulverized surface at the time of seeding.
Any irregularities shall be corrected before the fertilizer or seed is placed. Any settlement
or displacement of the topsoil shall be restored to the established lines and grades at the
Contractor's own expense.
1660-4 FERTILIZER
The quality of fertilizer and all operations in connection with the furnishing of this material
shall comply with the requirements of the North Carolina Fertilizer Law and regulations
adopted by the North Carolina Board of Agriculture.
Fertilizer shall be 8-8-8 grade (8 parts nitrogen, 8 parts phosphoric acid, 8 parts potash).
Upon written approval of the Engineers, a different grade of fertilizer may be used, provided
the rate of application is adjusted to provide the same amounts of plant food.
1660-5 LIME
The quality of lime and all operations in connection with the furnishing of this material
shall comply with the requirements of the North Carolina Lime Law and regulations
adopted by the North Carolina Board of Agriculture. During the handling and storing, the
lime shall be cared for in such a manner that it will be protected against hardening and
caking. Any hardened or caked lime shall be pulverized to its original condition before
being used.
Town of Lake Waccamaw Stormwater Improvements 1 of 2
Section 1660

Lime shall be agriculture grade ground dolomitic limestone. It shall not contain less than
85% of the calcium and magnesium carbonates and shall be of such fineness that at least
[� 90% will pass a No. 10 sieve and at least 50% will pass a No. 100 sieve.
1660-6 APPLICATION RATES
The rates of application of seed, fertilizer and limestone shall be as stated below. All rates
are in pounds per acre.
1660-7 SEEDING
Immediately following preparation of the seed bed, the seed, as outlined, shall be uniformly
applied by a mechanical spreader. The seed shall be raked lightly into the surface and rolled
with a light hand roller weighing not more than 100 lbs. per foot of width. Seeded areas
shall be sprinkled with a fine spray in such a manner as not to wash out the seed. Seeding
shall be done on a still day and only with the approval of the Engineer.
The Contractor shall be responsible for establishing a good lawn over the entire area
seeded and shall maintain these areas in an approved condition until final acceptance of the
contract.
1660-8 MULCHING
Straw mulch shall be threshed straw of oats, rye or wheat free from matured seed of
obnoxious weeds or other species which would grow and be detrimental to the specified
grass. It shall be spread uniformly at a rate of two tons per acre in a continuous blanket over
the areas specified. Thickness of the covering shall be adequate to hold the soil but
sufficiently loose and open to favor the development of grass.
Pine straw mulch shall consist of fresh longleaf pine straw free from matured seed of
obnoxious weeds or other species which would grow and be detrimental to the surrounding
area. Area shall be mulched at a rate of 400 bales per acre with a maximum payment width
not to exceed the clearing limits.
1660-9 PAYMENT
Payment for seeding and mulching will be made at the unit price bid for seeding, and
mulching as described above. Payment shall be full compensation for materials, labor,
equipment, tools, maintenance, and other incidentals necessary to complete the work.
Town of Lake Waccamaw Stormwater Improvements 2 of 2
Section 1660

SECTION 1660 SEEDING AND MULCHING
1660-1 DESCRIPTION
The work shall consist of seeding and mulching. All disturbed areas.
1660-2 GRADING
Rough grading shall be done as soon as all excavation required in the area has been
backfilled. The necessary earthwork shall be accomplished to bring the existing ground to
the desired finish elevations shown on the Contract Drawings or otherwise directed.
Fine grading shall consist of shaping the final contours for drainage and removing all
clumps of earth and waste construction material. It shall also include thorough loosening of
the soil to a depth of 6 inches by plowing, discing, harrowing or other approved methods
until the area is acceptable for subsequent seeding operations.
1660-3 TOPSOIL
After the subgrade has been fine graded to the satisfaction of the Engineer, previously
stodkpiled topsoil shall be spread over the area to a uniform depth and density. The soil
shall be uniformly compacted by a light roller to a depth not less than 4 inches, unless other
depths are shown on the plans. When finished, the surface shall conform to the finished
grade shown or required and shall have a smooth pulverized surface at the time of seeding.
Any irregularities shall be corrected before the fertilizer or seed is placed. Any settlement
or displacement of the topsoil shall be restored to the established lines and grades at the
Contractor's own expense.
_ 1660-4 FERTILIZER
The quality of fertilizer and all operations in connection with the furnishing of this material
shall comply with the requirements of the North Carolina Fertilizer Law and regulations
adopted by the North Carolina Board of Agriculture.
Fertilizer shall be 8-8-8 grade (8 parts nitrogen, 8 parts phosphoric acid, 8 parts potash).
Upon written approval of the Engineers, a different grade of fertilizer may be used, provided
the rate of application is adjusted to provide the same amounts of plant food.
1660-5 LIME
The quality of lime and all operations in connection with the furnishing of this material
shall comply with the requirements of the North Carolina Lime Law and regulations
adopted by the North Carolina Board of Agriculture. During the handling and storing, the
lime shall be cared for in such a manner that it will be protected against hardening and
caking. Any hardened or caked lime shall be pulverized to its original condition before
being used.
a Town of Lake Waccamaw Stormwater Improvements 1 of 2
Section 1660

7
Lime shall be agriculture grade ground dolomitic limestone. It shall not contain less than
85% of the calcium and magnesium carbonates and shall be of such fineness that at least
90% will pass a No. 10 sieve and at least 50% will pass a No. 100 sieve.
1660-6 APPLICATION RATES
The rates of application of seed, fertilizer and limestone shall be as stated below. All rates
are in pounds per acre.
1660-7 SEEDING
Immediately following preparation of the seed bed, the seed, as outlined, shall be uniformly
applied by a mechanical spreader. The seed shall be raked lightly into the surface and rolled
with a light hand roller weighing not more than 100 lbs. per foot of width. Seeded areas
shall be sprinkled with a fine spray in such a manner as not to wash out the seed. Seeding
shall be done on a still day and only with the approval of the Engineer.
The Contractor shall be responsible for establishing a good lawn over the entire area
seeded and shall maintain these areas in an approved condition until final acceptance of the
contract.
1660-8 MULCHING
Straw mulch shall be threshed straw of oats, rye or wheat free from matured seed of
obnoxious weeds or other species which would grow and be detrimental to the specified
grass. It shall be spread uniformly at a rate of two tons per acre in a continuous blanket over
the areas specified. Thickness of the covering shall be adequate to hold the soil but
sufficiently loose and open to favor the development of grass.
Pine straw mulch shall consist of fresh longleaf pine straw free from matured seed of
obnoxious weeds or other species which would grow and be detrimental to the surrounding
area. Area shall be mulched at a rate of 400 bales per acre with a maximum payment width
not to exceed the clearing limits.
1660-9 PAYMENT
Payment for seeding and mulching will be made at the unit price bid for seeding, and
mulching as described above. Payment shall be full compensation for materials, labor,
equipment, tools, maintenance, and other incidentals necessary to complete the work.
Town of Lake Waccamaw Stormwater Improvements 2 of 2
Section 1660

SECTION 876 RIP RAP
876-1 DESCRIPTION
Construct concrete rip rap or plain rip rap in accordance with the requirements of the
plans and specifications and at the locations designated on the plans or as directed.
Work includes but is not limited to all excavation, embankment preparation, and
backfilling; and furnishing and placing concrete, reinforcement, stone or broken concrete
rip rap, filter fabric, and other materials.
876-2 MATERIALS
Plain rip rap consist of quarry run stone, or field stone, or broken concrete, and is
classified by size into either Class 1 or Class 2. Plain rip rap when classified as either
Class A or Class B must consist of quarry run stone or field stone. Use the class and
thickness called for on the plans. Place filter fabric under plain rip rap where indicated in
the plans.
876-3 PLAIN RIP RAP
Unless otherwise directed, place the stone where indicated in the plans. Grade the stone
so that the smaller stones are uniformly distributed throughout the mass.
Place the stone by mechanical methods, augmented by hand placing where necessary.
Complete the rip rap to form a properly graded, dense, neat layer of stone.
Install the rip rap to at least the thickness indicated on the plans. Construct toe walls and
other construction details as indicated in the plans.
Any additional excavation required for the placement of rip rap will be considered
incidental to the cost of the rip rap.
At locations where rip rap is required for channel changes and drainage ditches, place the
rip rap prior to diverting the water into the channel changes and drainage ditches.
At locations where rip rap is required at the outlets of pipe culverts, place the rip rap
immediately after completion of the pipe culvert installation.
Unless otherwise directed, grade the surfaces which receive filter fabric to the lines and
grades shown on the plans. Provide a surface free of obstructions, debris, and pockets of
soft or low density material.
The fabric will be rejected at the time of installation if it has defects, rips, holes, flaws,
deterioration, or damage incurred during manufacture, transportation, or storage.
Lay the fabric smooth and free from tension, stress, folds, wrinkles, or creases. Make
horizontal overlaps a minimum of 12 inches (300 mm) with the upper fabric overlapping
the lower fabric. Make vertical overlaps a minimum of 18 inches (450 mm) with the
upstream fabric overlapping the downstream fabric. In the event that the fabric is
displaced or damaged during rip rap placement, remove the rip rap and reposition or
Town of Lake Waccamaw Stormwater Improvements 1 of 3
Section 876

replace the fabric prior to replacement of the rip rap, all at no additional cost to the
Owner.
Place the fabric and rip rap in a continuous manner. Protect the fabric from damage while
placing rip rap or other materials.
Do not allow more than 72 hours to elapse from the time the filter fabric is unwrapped to
the time the fabric is covered with rip -rap or sand.
876-5 METHOD OF MEASUREMENT AND PAYMENT
(A)
Ton:
The quantity of rip rap measured will be the actual number of tons of each class of
rip rap which has been incorporated into the completed and accepted work.
The rip rap will be measured by being weighed in trucks on certified platform
scales or other certified weighing devices.
(B)
Filter Fabric:
The quantity of filter fabric measured will be the area in square yards (square
meters), measured along the surface of the ground, over which fabric has been
acceptably placed.
876-6 BASIS
OF PAYMENT.
(A)
Concrete Rip Rap:
The quantity of concrete rip rap, measured as provided in Subarticle 876-5(A), will
be paid for at the contract unit price per square yard (square meter) for "Concrete
Rip Rap".
(B)
Plain Rip Rap:
The quantity of plain rip rap, measured as provided in Subarticles 876-5(A) or 876-
5(B), will be paid for at the contract unit price per square yard (square meter) or per
ton (metric ton) for 'Plain Rip Rap, Class B". The unit of measurement to be used
will be that called for in the contract.
(C) Filter Fabric:
The quantity of filter fabric, measured as provided in Subarticle 876-5(C), will be
paid for at the contract unit price per square yard (square meter) for "Filter Fabric
for Drainage."
(D) Compensation:
The above prices and payments will be full compensation for all work covered by
this section.
Town of Lake Waccamaw Slormwater Improvements 2 of 3
Section 876

(E) Basis of Payment:
Payment will be made under:
Plain Rip Rap, Class B Ton
IN Filter Fabric for Drainage Square Yard
Town of Lake Waccamaw Stormwater Improvements 3 of 3
Section 876

SECTION 1606
GRAVEL CONSTRUCTION ENTRANCE/EXIT
1606.1 GENERAL
A. The work covered by this section consists of furnishing, installing, maintaining
and removing temporary gravel construction entrance/exits. The entrance/exit
shall be located at points where vehicles enter and exit the project and as indicated
on the plans to limit sediment "tracked" off the site.
1606.2 STONE
The stone shall be two inch (2") to three inch (3") washed stone.
1606.3 INSTALLATION
A. The area to receive the stone shall be cleared of all vegetation, roots and other
objectionable materials. The subgrade shall be graded and properly compacted.
Areas yielding shall be covered with engineering fabric or undercut as directed by
the Engineer. The stone shall be placed, graded and compacted to a minimum
depth of six inches (6") and as shown on the plans. The minimum construction
entrance dimensions shall be 50 feet in length and 12 feet in width. The
construction entrance/exit shall be maintained and the stone supplemented
throughout the life of the project and shall be removed upon stabilization and
disposed of off -site at the Contractor's expense.
Town of Lake Waccamaw Stormwater Improvements 1 of 1
Section 1606

SECTION 1042 RIP RAP MATERIALS
1042-1 PLAIN RIP RAP
® Stone for plain rip rap consists of field stone or rough unhewn quarry stone. The stone
a must be sound, tough, dense, resistant to the action of air and water, and suitable in all
other respects for the purpose intended. Where broken concrete from demolished
structures or pavement is available, it may beused in place of stone provided that such
use meets with the approval of the Engineer. However, the use of broken concrete which
contains reinforcing steel will not be permitted.
All stone must meet the approval to the Engineer. While no specific gradation is required,
equally distribute the various sizes of the stone within the required size range. The size of
an individual stone particle will be determined by measuring its long dimension.
Stone or broken concrete for Rip Rap must meet the requirements of Table 1042-1 for the
class and size distribution.
TABLE 1042-1
ACCEPTANCE CRITERIA FOR RIP RAP
AND STONE FOR EROSION CONTROL
REQUIRED STONE SIZES — INCHES (mm)
CLASS
MINIMUM
MIDRANGE
MAXIMUM
A
2(51)
4(102)
6(152)
B
5 (127)
8 (203)
12 (305)
I
5 (127)
10 (254)
17 (432)
2
9 (229)
14 (356)
23 (584)
No more than 5.0% of the material fumished can be less than the minimum size specified
nor no more than 10.0% of the material can exceed the maximum size specified.
1042-2 FILTER FABRIC
The filter fabric must meet the requirements for Type 2 fabric.
1042-3 TESTING
Test Rip Rap materials in accordance with the requirements of this section. Satisfactory
resistance to abrasion will be considered to be a percentage of wear of not greater than 55
percent. Satisfactory soundness will be considered to be a loss in weight of not greater
than 15 percent when subjected to 5 alterations of the soundness test.
Town of Lake Waccamaw Stormwater Improvements. I of 1
Section 1042

SECTION 1605 TEMPORARY SILT FENCE
1605-1
GENERAL
A.
The work covered by this section consists of furnishing, installing, maintaining
and removing a water permeable filter type silt fence for the purpose of removing
—
suspended particles from the water passing through it.
B.
The quantity of temporary silt fence to be installed will be affected by the actual
conditions, which occur during the construction of the project. The quantity of
temporary silt fence may be increased, decreased, or eliminated entirely at the
direction of the Project Engineer. Such variations in quantity will not be
considered as alterations in the details of construction or a change in the character
of the work.
1605-2
MATERIALS
_ A.
Either wood posts or steel posts may be used. Wood posts shall be a minimum of
6 feet long, at least 3 inches in diameter, and straight enough to provide a fence
without noticeable misalignment. Steel posts shall be 5 feet long, 1 3/4 inches
wide and have projections for fastening the wire to the fence.
B.
Wire fence fabric shall be at least 32 inches high, and shall have at least 6
horizontal wires. Vertical wires shall be spaced 12 inches apart. The top and
bottom wires shall be at least 10 gages. All other wires shall be at least 12'/2
gages.
C.
Burlap shall be at least 36 inches wide and shall weigh at least 6.7 ounces per
square yard. Other materials may be used in lieu of burlap, provided the Project
Engineer has approved these materials.
D.
Wire staples shall be No. 9 staple and shall be at least 1'/2 inches long.
1605-3
INSTALLATION
A.
The Contractor shall install temporary silt fence as shown on the plans. The silt
fence shall be constructed at the locations shown on the plans and at other
locations directed by the Project Engineer.
B.
Posts shall be installed so that no more than 3 feet of the post shall protrude above
the ground and at 18 inches are driven into the ground. Filter fabric shall be
attached to the wire fence fabric by wire or other acceptable means. The fabric
shall be continual in length. The fabric shall extend into a 6"x 6" trench along the
uphill side of the fence. The trench shall be backfilled and compacted. Place 6
inches of No. 57 stone along the toe of the fence to secure the fabric in place. The
e
single stripe located approximately 6 inches form the silt fence outer edge should
not be visible if the fabric and fencing are installed properly.
Town of Lake Waccamaw Stormwater Improvements 1 of 1
Section 1605

a
SECTION 200 — EARTHWORK - CLEARING AND GRUBBING
a200-1 DESCRIPTION
Perform the work of clearing and grubbing in all wooded areas between the construction
limits and in all non -wooded areas between the construction limits and the limits of the
project right of way or in easements shown on the project plans where seeding and
mulching, sprigging, sodding, or other work indicated in the plans is to be performed.
• Clearing is defined as the cutting, removal, and satisfactory disposal of all wooded
vegetation and debris.
• Grubbing is defined as the complete removal and satisfactory disposal of all grassy
vegetative matter, root mat, ball and root, soil material high in organic content, and
surface debris.
Perform the following as part of the work of clearing and grubbing:
1. Remove and dispose of crops, weeds, and other annual growth.
2. Remove and dispose of surface debris such as fences, steps, walls, chimneys,
column footings, other footings, foundation slabs, basements, other foundation
components, signs, junked vehicles, and other rubble and debris.
3. Fill holes and depressions.
4. Cut off and plug at the right of way or construction limit any private water or sewer
line intercepted during the construction of the project.
5. Cut off and remove from the right of way or construction area any septic tank or
portion thereof intercepted within the right of way or construction area during the
construction of the project.
6. Remove materials in wetland areas to a depth of F (0.3 m) below existing ground
to be measured in accordance with Section 225.
Perform clearing and grubbing operations sufficiently in advance of grading operations to
prevent any of the debris from the clearing and grubbing operations from interfering with
the excavation or embankment operations.
In environmentally sensitive areas shown on the original plans, perform grubbing
operations no more than seven (7) calendar days prior to beginning continuous grading
operations.
Perform all work under this section in a manner which will cause a minimum of soil
erosion and which will meet the requirements of Article 107-13. Coordinate the work
with other operations such that no more than 17 acres (7 hectares) of exposed, erodible
surface area will be accumulated at any one given time by the clearing and grubbing
operation until erosion control measures are provided unless otherwise increased or
decreased by the Engineer. Begin the installation of temporary or permanent erosion
control measures as soon as clearing and grubbing or land disturbing activities begin.
Perform such erosion control work, temporary or permanent, as may be necessary to
satisfactorily minimize erosion resulting from clearing and grubbing operations.
er Town of Lake Waccamaw Stormwater Improvements 1 of 3
Section 200

The Contractor may request an increase in the number of accumulated acres exposed by
'I clearing and grubbing. If approved, provide and maintain such erosion control measures
including temporary seeding and mulching as may be directed at no cost to the Owner.
Failure on the part of the Contractor to perform the required erosion control measures
will be just cause for the Engineer to direct the suspension of clearing and grubbing
operations in accordance with Article 108-7. The suspension will be in effect until such
time as the Contractor has satisfactorily performed the required erosion control work. In
the event the Contractor fails to perform the directed work within a reasonable length of
time, the Engineer may have the work performed in accordance with Article 105-16.
200-2 MATERIALS
Refer to Division 10.
200-3 CLEARING
Perform clearing within the limits established by the clearing method required by the
plans and as directed.
The Engineer will designate all areas of growth or individual trees which are to be
preserved due to their desirability for landscape or erosion control purposes. When the
trees to be preserved are located within the construction limits, they will be so shown on
the plans or designated by the Engineer.
In embankment areas where the depth of the embankment exceeds 6 feet (1.8 m) in
height, cut sound trees at a height of not more than 6 inches (150 mm) above natural
ground. When trees are to be cut outside the construction limits and the Engineer has
designated that the area is not to be grubbed, cut the trees off reasonably close to the
natural ground surface. Cut trees off to approximately 6 inches (150 mm) above low
water level in swamp areas.
Prevent limb, bark, or root injuries to trees, shrubs, or other types of vegetation that are to
remain growing and also prevent damage to adjacent property. Repair scarred areas in
accordance with generally accepted horticultural practice. Where plants are damaged by
any construction operations to such an extent as to destroy their value for shade or other
landscape purposes cut and dispose of same without extra compensation.
200-4 GRUBBING
Perform grubbing on all areas cleared, with the following exceptions:
1. In embankment areas, when the depth of embankment measured under the project
exceeds 6 feet (1.8 m) in height, cut off sound stumps not more than 6 inches (150
mm) above the existing ground level and do not grub. Remove unsound or decayed
stumps to a depth of approximately 2 feet (0.6 m) below the natural ground surface.
j` 2. When authorized, leave stumps in place which are outside of construction limits.
Cut such stumps off reasonably close to the natural ground surface.
3. Cut off stumps in swamp areas to approximately 6 inches (150 mm) above low
water level and do not grub.
® Town of Lake Waccamaw Stormwater Improvements 2 of 3
Section 200

IL
4. Do not grub in areas where waste or unsuitable material is to be deposited unless
such areas are to become a part of a future project.
Grub all areas where piles are to be driven regardless of fill height.
Fill all holes and other depressions within the areas between the construction limits and
the limits of clearing and grubbing. Bring all areas where later mowing operations will
take place to a uniform contour.
200-5 DISPOSITION OF TIMBER, STUMPS, AND DEBRIS
All timber, in clearing limits, becomes the property of the contractor after the date of
availability.
Do not cut any timber beyond the clearing limits established nor any timber which is to
be preserved for landscape or erosion control purposes except at the direction of the
Engineer.
Remove from the project and properly dispose of all vegetation, roots, stumps, tree laps,
and timber remaining on the project by a satisfactory method.
When vegetation is disposed of by burning, bum in such a manner as to prevent injury to
property within or outside of the right of way. Comply with all local, state, and federal
laws, ordinances, and regulations when burning. Secure all necessary burning permits.
Perform all burning under the constant care of a competent watchman. Do not allow
smoldering or dense smoke to occur during burning.
When the timber and debris is disposed of in locations off the right of way and out of
sight of the project, furnish the Engineer verification that the site is permitted if required,
an approved reclamation plan is filed and furnish a written release from the property
owner, or his authorized agent, granting the servitude of his lands before disposal begins.
If it is not burned, dispose of all debris including vegetation in accordance with Section
Q 802. (Disposal of Waste & Debris).
200-6 SELECT TREE REMOVAL
When the contract includes the item of "Select Tree Removal", and the work of clearing
and grubbing has been completed to the original clearing limits, the engineer may elect to
have select trees removed from the project. Trees removed in this manner must have an
average cross section diameter of at least 4 inches (100 mm) at a point 2 feet (0.6m)
above the ground level.
Completely remove the select trees including the root ball, and properly backfill unless
otherwise directed.
200-7 METHOD OF MEASUREMENT
Clearing and grubbing for Project will be on a lump sum Basis.
200-8 BASIS OF PAYMENT
Payment for the work covered by this section will be made on a lump -sum basis.
Town of Lake Waccamaw Stormwater Improvements 3 of 3
Section 200

re
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Name: LAKE WACCAMAW WEST Location: 034° 19' 04.5" N 078° 30' 47.0" W
Date: 12/12/2005 Caption: Lake Waccamaw Stormwater Improvements —Tasks 2,3, _4
Scale: 1 inch equals 1000 feet
Coppght(C) 1997, Maptech, Inc.

t,. f
Hydrologic Calculations
Lake Waccamaw Pond 2Cl
PORQ
i 1 t U.F
,., in 's 47 ,Jai H4lA' iii i' I
zi Hvdroaraph formulation ,
1,60
Drainage Subarea:
4
Jeff Lanes Property
',tin,
Runoff Volume Estimate (SCS Curve Number Method)+=. m
Drainage Area (ac) 40.1 F acres n
CN - 80 SCS,Curve Number
C= 0.4 Rail Coeff: (0 02'CN-1)
S 1000 10 S 2 50
CN
R O (in) _
(R,„+A 8"S)
t
1-yr
10-yr
1 00-r
R.O. (in) = 0.97
R.O. (in) = 2.72
R.O. (in) = 4.79,
R.O. (cf) = 140,577
R.O. (cf) = 395,803
R.O. (cf) = 696,783
�r,.,Runoff,;from 1" Precipitation,.
2 R.O. (in) 0.08�'''
R.O. from 1" of Rainfall (cf) = 12130
Time of Concentration and Intensity Derivations. ,
Kirpich s Equation ,t
K' (L^3/H)A0.385
'Tc
128
�fr!�, It ..........Ilrl
L = 1650 Hydraulic Length of watershed (ft)
FI = 6
Elevation cliff along L2'= (ft)
K = 1
Multiplier.for..flow path conditions ,,,
(see HRM suPP,t,p? 4)
Tc'= 20.39 min.'
g & h"are Yegressiori coeff
I = ' (from HRM p: 2 6)
,;listed in HRM ,
h + T'
supplement p. 5 3 '
T = Tc
f ..4.,'.
1-yr
10-yr
100-yr
In
(2.61
g _
-
P (in) 4.8
g 252
in) =- 7P
P(.1
g 376134
2
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(in/hr) 3.02
,I (i.0
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..,,. =:Peak Flow (RatIona f Ma hod)
t,
Q (cfs),= CIA;
Q (cfs) _ 48 Q (cfs) 80 Q (cfs) - 111
Tp (min) 34.8 Tp (min) 59.2 Tp (min) 75.3
Prepared byjthompson 12/16/2005 Page 1

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Prepared by jthompson 12/16/2005 Page 1

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1,11
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0
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Max. Water Surf. Ele.
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9M0RM
a M-OMM
WIN-090-1
goo"
NWOMM
M
Oj?R;-?T7vwi7,,T
MoWil
M T50 dR,,A,`.
Mffr,*VNTR,
M!14'C;r`,:.`
16AMNOMMUM
§554., OM,l
M7,3&". ;ln!
gUr7,!654
&T.'62A
MW46M
Ck
67PT597623M
In
W4JM
OVA
IMOMA
D.
11
13 d
-
7,
[_
4350993EYa
MUT60144
N;V60M
W37AN
WAS
UWAN
KMOMM
ig
=3V
6-2
.
W .,q349275M
M59!58tMM
0758W
RIT�56n
9A34M
P23190
MOM
WORMS
MWORM
MWONW,
MMOMM
swa."M
MWOMW
wM09"
AMOM
'W'Y O& MUMMINu
M1934"% il
�459-56MML
174
M-3
WOOMS
80 Z;:
2ZTW,,%t
i222YAL't'a
M93447824701
=591524IRR
T& T52NN"
OW, 25 t
MROMIN
MWOROM
UMORM
WOOMM
MPPIOMA
FXRTV1251iv!d
WgO—iOIWu,
%WORM'
01000,
2U.M6,
TTIMA192e,
-�-1'204
U859.,4711*
%lZf47A'3
il 9rm
WF�OYM
CMOs"
fiRSOMM
M KNOWN
91 M-09FIN�d
­,�IJIZ777
Z�
4A`34006%kA,
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Mgm
Prepared by jthompson 12/16/2005 Page 2

® so
® ■ iRouwlot i
120
100
NN
.e
20
0
0
Lake Waccamaw Pond 2 LPK Po NO
Pond Routing
50 100 150 200 250
Time (min)
Prepared by jthompson 12/16/2005
Page 1

® ® © IMI
Hydrologic Calculations
Lake Waccamaw Pond 3a
,'Hydrograp`h;formtlatfon ' ir i
ti Nam[
e Draina w
an° 9.._Subareat�
+
i x'i
'� Gtht�` �. } Y'9 t
Sutton Place Pond
«'i i5 4 t J ' J e J`4i�ril �{ >7 �14i., .14
c . >' ab .$
i�fi,N ky�*. t - y f 1' ri` i S b� i1 al Ya k✓ is I A�
tY •� .in....4..n i..z".
"" "'Runoff Volume- Estimate,:(SCS?Curve Number. Method
Drainage�Area;(ac)� �. 18.96 `acres c P
]'SO
Tt 80C0.4 Rat Coeff
I (0 02 CN 1)�� 0
1 �(.
i3viM14t
dj�'y f i is 5 1 �.tf.,ryy p t ti,l. ��r�l i,L' tli
1000 010 x� r 5 2 5ry0 ', ay
S r
YG
v •� +:' R .n
1-yr
107yr
100-. r .:
R.O. (in) = 0.97 -
R O (in) '=, 2.72 `
R'O.,(in) 4:79
R.O:-(cf) = 66,483' _
R.O. (cf),=. ��:187,186
R.O �(cf) 329,528'
p , ,Runoff from 1" Precipitation C '• '
�IDA (ac)J'y18'964417t
S (i_n)f 2'50 " R O (in) O 08a z
R.O. from 1" of Rainfall (cf)_= , -5737 _
Storage of Pond (2')=36,750 cf
y?t t Peak Flow (Rational Method)
Q (cfs) 22 Q (cfs) �-37:,; Q (cfs) 51
2 ,w „Tp (min).
Prepared by jthompson 12/16/2005
Page 1

Stage -Storage Data
Lomputation,�of thbfStag"e Storage'Fu ctfon t
NContour greaIncVo Accul Stag _ In S InrZ Z est
ft) ft 2)t�ft 3) !ft^3)
50 15 659lfkfl0
a0
�0 00000�.0,�y�0y0yp 0 00
50 5� tt16 970 " 8�15T�815.7,,�0;5
9 007ra-0 693 WWI
51 18;282 8;813
O16;970
,= 1 9 739 0 98"
a
51 5 20 2691 9 638 ;
26 608
a ;.
�1.5 E 10 189 �0 40�
�52 t3 22 256 e"10 631
37,239
q6«
2 6931
10 525� `0 96
£S
�7.7,R57Y
y,w-1121
05.0".
k,8.14'a6.F.S'�,ct'
.
i4.4
2,r!:?5=*'s "�£,10
a24iY34'R.
C6"Ya 3":?01
91'.:
7-9.
9`5*
$-22`:45$
-s: '.^.i
850E, e,45
b.ra4��*8-•
r„6
ym10T
17,333
1.14
rOUTT
rs
Total 474 - - 220 164280,,2.393939
Prepared by jthompson 12/16/2005 Page 1

L - - I
akeVa'db P'
51
To (r�iir)
77(1 00-yr data)
.8
A -v I" X., I
4;b�A8'o,'IP, "So ggested,,Time, I ncrem6ht (TOY1 0) NA'
S-
efectedTime'ln GMOKR11�slj!lf
1,7332i69 - gr ssgon,Gg Q nfs',l
b;: A Ai,�14-v, . 1 "' � .,82rag P0,
50
Results:
Max.Total Outflow
51
cfs�
'Max. Barrel Flow
0
cfs
Max. Water Surf. Ele.
52.77
ft
Max. Stage:
2.77
ft
-Max. Storm Storage:
,55218'
c
0
(in),11
0
3.0
ff,6piEle:,(ft
51.00
—3,30
r Invert"(ft)
50-00
Elea, ft
52.00
Cw,-7Z-f
Iccl-,W-
0.59
'Length (ft)?
25
oRn
NAWeir'Equatlo'n:!q<
Orlfte'Equation :V;,
tW
CwF t"L, I
.,_fRisericofisideratioh--
Aqelqy,�r 0
0
f t 7 vFmn
-Inflow from offsite. oUfiiping:-,
z 'add Q V 1 0.0
adcl'02,��j 0.0
-#�,,Routlng-.,T bi
,,Total Inflow
Wtr:Surf .;Ele,,
StageA
T,JFW%
R, .9 a "gControl
ett)
1
WMbeEN
gf(drin,u.
SIR
mloimm
0
r,Eine(C,
t Spillway:
,N--i
(cfs),?TX
0
50.00
0.0&
an.",#
0
-T 0',
je,L 2IT
50'02'.l"
0.02:''"
77,77Oru-1,;
0
�Umn
MOW %
071o"?
il,,FVXC-0
IMORFM
AWOOW5
Wt4Omw
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w, �Ic. 8; "i tZ,
v 21K-.` A Li 8 TO
2 12 6
k1"! 5 0 : 1 62' �,a
0 16 ,
zi 0
�p 0 F 9-� il�
;"r 0=
"*'o
5,
n-a4481-
1�1
N-,tL50:30
g
F"''.060
E�MO.Ql*
M. 0i4
gw,4Mni,
Ako=
40-,
" L `
0 4,
IA 7�
—i.,'_,12998!,CV
�i 0.1�§-
0'
:-.1,0VQ
WiFamw
5*-Aomm
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—,77"'o
1. ?i,, , 4",
2
K"A,19432 -�,,V
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y
mgm.-* 09"
ff"ON
-94NO
kw-0
$VVIOT0
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IRTr,,,ItoeIL
AK*50,140
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Z,,
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t".."109"I
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0
Mgom-v�
lmIRm02WYJ
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A
Q -4
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�,,,;'549231%`�-�
-
-,Ili
�521763,�"U�
� "' 0 'AI2,'
S
11449',
e'�"I
Prepared by jthompson 12/16/2005 Page 1

I = --ItinglY
r- = =
t."i'llbi 00 il4
Vllvti4 TIRF c,-rA
7,41387
-,LR"Sf45N2
4P VNII�"P
CJ�0!-M� MI A,;
N
�k41
W'953700)K�'�
9i'm
0528545rN
WT352�70,%`-m
iMM52f
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274
W,,2!mlrm!
NZ67,4111
47
—%W4490,
4SW 4,1
Uo
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WO,
WHOW,
ftwo
MMOMW
3MOWM
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CAM0580111
15130E%
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YW5260Fit--g
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—VZ—W'W--35
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43 520,,
wWO—w
MROMM
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�
&al7l25�;$119PitA,:2N
7W,[W4'MM
27M
WOMmoFno
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MORN
�X,a
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ANif49289,LWIM
rW48122"l%M
.758MrM15233WI
M"RIL4708UMM
5„N52151
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M W41MM
WM5Z39W'---2WW1
T,5lrR.
-
9''Z243ZM21MQTuW
0441,w
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8
AMRMMNMWOMoWwomwo
moo
a,0"
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o
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MMOMT4
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R—AiRo—za
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64521i,,'4
—me-si -uiwi
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9346602MA
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LQ�1W9W
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m0
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'Zr�gl,4531 ' 0
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Prepared by ithompson 12/16/2005
Page 2

I ® 1
Re]
50
O
U)
w
30
a
20
10
0
0
Lake Waccamaw Pond 3a
Pond Routing
20 40 60 80 100 120 140 160 180
Time (min)
Prepared by jthompson 12/16/2005
Page 1

High
Low
End CL
CL-sw
I
AREA
Length
Point
Point
Ht
I Ht
HT
Tc
10 VR
Swale
(SQ FT)
(AC)
(FT)
(FT)
(FT)
(FT)
(Ft)
(FT)
(min)
(IN/HR)
C
36}�
975,523
22.39
1,825
62.40
52.00
10.4
56.30
4.30
19
5.2
0.40 '
Tot
3,477,534
80
For 10 year storm in Wilmington
1= g/(h+Tc)
g=
252
h=
30
P=
4.8
IN
LININ(
EM
S&M
-SEED & MULCH -
Shear Stress:
EM
EXCELSIOR MAT
0.00 Lb/SF
SM
SYNTHETIC MAT
RR
RIPRAP
(A,B,7,2)
RM
REVETMENT
TERMINOLOGY:
Input:
Q=
Peak Discharge (CFS)
d =
max depth water (FT)
n =
Manning's "N" Coef.
B =
Bottom Width (Ft)
Z =
Side Slope Channel (Z:1)
S =
Slope of Channel (FT/FT)
Y=
Wt of Water (62.4 Ib/cf)
D=
Depth Of Flow
n
Calculated Output
A = Cross -Sectional Area of Flow,
P = Wetted Perimeter of the Flow, (FT)
R = Hydraulic Radius, (FT)
Q = Trial Discharge, (CFS)
W = Top Width of Water in Channel,
T= Shear Stress (LB/SF), <0.4 Soil, > 0.4 Grass, >.9 EM, >2 Rip Rap
B I Z Start (FT) End (FT)
T) (FT) Rd I Ditch I Diff I RD I Ditch I DR
Rd CL I (FT/FT)
0.0018
Ff/S

L
W T
(Fr) (LeisF) Qa-Qr Notes
31.80 0.201 1.45 EM

Hydrologic Calculations
Lake Waccamaw Pond 3
5 ,I , .; "rRF of �t �'u j '� ''`r ,tdt•�
Hvdroaraohaformula'iinn
The
79
0.4
1-yr I »-yr 100
O. (in) = 0:91 R:O. (in),: '2:63. R.O.•(in)' ".
O. (cf) = 317,799 R.O.,(cf) : 916,600 ; R.O:(df).= I.
r yiRungff from.l"fPreapltationr
m), 2266 fir" FirO (in).� 07 ,
R.O. from.1 ".of Rainfall:(cf).=,; 24449
750
7
1
134
24
50534
41850
53851
49285
67432
102484
Prepared by jthompson 12/27/2005
171
24
A.
1.16010101
0.9607438
1.23624885
1.13142792
1.54802571
2.35270891
8.3892562
252
30
1
9rf
376
34
Page 1

Stage -Storage Data
r` a e accamaw:� ton CPA2K P � " t sr,Nv)
-
. "3,; 5
MAMA R' U,IrementS
Preliminary Data flora rectangular. design
Drama9e Area: 163
' ' =
acres
Side Slope 6
"m r6"-G. -s,:
Imp 40
Fr YF® C�-v'ry-'*`he. t-
faL-:Wx�
axzq
Area
acres'f„
3' 1*SolvedLF5837923
`:.'�' •i .ad ':z z5 Y^
F ` 25%£
%alm
� Lf 3TM= .iy.-_
�'m-.ta:: -".-
"
dx
.. -=r
=-'-•s
=24£'a. ... a _M1 a��
iu'Y.,ti y'�•
`&- S��,R •, 4E#S` 1
,..� ±icf
ervwus
TSS=Remova185%
/ar-
=ele L W,n
«� xs :o € _
Area ft2,
° . ()Acres
_ 3 Srde Sloe -
,>�_���..__ p
30
.1
._y M,
Srde':Slo e t
"- P .,_.
6?e
1
•'� ,..,e-. r sue..
4.0
i __ r� Y , .r 5 .r
ft -, • _�_.:_.',
W4:
-:,;:
. ,
_, 3
., ar.
pr :^�c;,x
,„,�r'd sx
rci
+` :::. -..
., >k�s -
�..;�.ya;.. , 1,:,-'"_.•'�.*':5�
'_<,(NormalFool,Dep;h) ar4..;i
N.P. 600 200 ,.
120000
� 2.75:
ele"Lr,
L i
a-. FWw ;;Area;(ft^2)
9cres°.
_ _,eleL
": 7,W
Area-(ft^2)
;Ades f
;Req'dSA1DA:
1.6%
'�� a",+c. ...a..:Y-�.+,.
.
_ (Refe%toTable 1 '1;NCDENBBMF?s) 1
.... ... -. ,. -.
_ t - .
reference from -bottom to to ;•- , .. _4i=-€,
$ hr
h ''$1`�
'r *'^•, x?` �-..,ae 4
_600 ,_
fin ",
. ,200
�:
�r120;000
� }'.i�c''w'rw ^Si
T
r ^2:75r
$
>�.=5_f t„
-•
a
_,,,660,
f.=26017z1.600il,
f3 94
Req d SA, : 2.608- acres- _ ' 113 604
¢s f
-
'`552
g
;152t
_, -s
;83.904.
�1u93:;
t&: 5,a
_ _=.'660-�
�
�260�
,:1:71;600
394. �
,; s
3�x6� �,"
-,I
=
f -272 _;
a182,784
}`�"-x• "3-�;.»1 .'e4 .;:' y �,.' ':=_ ` 'ate -r"'`f ! _ .; T'
't .,r! {f
"_ `�`' -
_Lam'- +a
s • ;,a,
r�} ''r'•.as,-.
tt.w:- `
-7 "-, '-
's �vs-s f
`� 'V '
-� �-`a
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f•w.:wtP' r
rt296.
i;::. v-r,�;.R
a
- _F.2
nF 576
_`' 176'„
101376
t 2:33'"_u696_
_
-
'206t016°rx4.73
.: : .. < _..» .,kx''
. _, - ., _ ,a .' .•v...,
Design SA..., .2.75 acres = 120,000' s f
z �"R £E
0.
w
•'x'.:-. 5y
... �. 3 "=*r�°,
�..a,
f }:
.-..'h{
'{'' �j�,Y}{E
t'Iw' •�` Sa"5:..
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y'r'`@%3
IVW-,.!4 1
4., s,�k^°4vr,T1
t
A'€'3.we_
L`:� ff
• ;.
F
`2.75,,,
i,.
'vr s',
S--'
r. -:✓.: . .. ,m .',,.:- . *:. . .-;. .. _...f�,,v_,
-+a
: r.,. ,.
600.<t-,'
. ,. -, '6 .��
...200 ,_
..,
r 120,000:c:
A
,0 00
_.,10,,
, ,720,_.:
230,400
.-':z`
.„,5.29 i
S ,.yl�. .. ( ..: Vie° ..> �y 4.. <s �..: _.. .. .}.., .«. y, ,Mt '. "
-.., 'rx^,
-r._. r_.. b--µv
y... - m. ...:• .m^+� .5.:.. �^ •rte
Ndrmal:Poot Volume ,
�?'.', a' ..-:..}*.-.a
vui."y'3i .•^^
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s
v. _,
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-.(volumernthe:normatde the rt..:.- ,,.=405504••.�-. C:f.-=
.,_• > p 5t�„r . { r _
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r i.... }i:-.
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:N«.
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_ 4y t
_
'344
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55.936
_ 85'
n
5" 5.88_.
..., .... s ....... •g� :,. ,..a...,. ... �'_-aa..;y..: x. :.> .. :sr
.,..,.-. __., _._„ ,. ,_.<- rs..•=-: >t'r...--a .� -.:
-a,..:..,. a:.i.,.
__m,-.-» .�..^�t.
-_:
__;_. __
i. .�.•
..-.,.-...
,.€r
u. -..
,.r-m'+.�,:
-�€i;,�
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2�u CF,
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Lis.:
--.-.
"'�"'`�
3 =-t
•:-„
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",
.i„
:1 c��
t�,€:0,•
�000_
'_`._w,u.:�•
-
t,�
u}
`: ,'z?
',�°s x,,t
olume for 1 R.O... er _ �t��, 24449 c f.
e F�
ta,�
x
'ifs
v
r•
[
r 9x
i a.^:..-.;�. v :..:: $`#e x5. ✓•: ".x ..9rr'..:k.•:. «. .:vsrJ-.-PP,k .„T::..�ucN'
=v_Xf..:n. =i_':
ar ri
:y e'`q k.rirayx'r
r���
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'i;6
1-`tsdi�x`T'.c. k,.�
�_.
WS.tk a
d�
„Q;00�
1l 0
ma x.l ...
708
308
218,064,;
<<.5 01
'=Computaton,of the Stage5torage
Fcinctron
ter:;-`
Contour
Area
,"lncr Vol y
Accum Vol
Stage ,
* e 1n S�
In Z r
FZ est f
=<r(ft)
=(ft^2)
_ ft^3)•.=3.
.. (ft�3)
F_ :(tt) r_`
.. -WA
50
82 640
0'wgt
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Prepared by jthompson 12/27/2005 Page 1

100-yr Routing
Lake Waccamaw Pond 3
Routing Table (using HRM's "Chainsaw" method)
Structure Data
Circular
Rectangular
Weirs
Riser:
Barrel:
Riser:
Barrel:
Separate
Weir:
1 st Stage:
2nd Stage
Width (ft)
4
Width (ft)
2
Dia. (in)
36
Dia. (in)
24
Hei ht ft)
4
Height (ft)
2
Cw =
3
Cw =
3
Cw =
3
Qp (cfs) = 265
T min = 74 100-yr
o Ele. ft)'
55.1,
Invert (ft)
53.1
o Ele. (ft)
1000
Invert (ft)
53
Ele. (ft)
1000
Ele. (ft)
56
Ele. (ft) ,
57
Cw
3.3
Cd
0.59.
Cw
3:3
Cd
0.6
Length(ft)
18
Length(ft)
50
Length (ft)
40
(min) = 7 Suggested Time Increment (Tp/10)
T (min) = 4 Selected Time Increment
Cd
0.6
Cd
0.6
Weir Equation: Orifice Equation: Cd = Cw =
Q = Cw*L*H^(3/2) Q = Cd'A'(2*g'h)^(1/2) rifice Coef Neir Coeff.
Ks = 80268:82 Regression Coefficients from
b = 1.21 Sta a-Stora a Plot
ef. Ele. = 50 .(Bottom of pond). .
Results`_
Max. Total Outflow 256. .. cfs
Max.Riser Outflow ' 27 '-cfs
;Max. Weir Outflow 230 , ;' cfs
Max:Water.Surf.'Ele.- 5735;,.:_ft„'
Max. Stage:' 7 35 - It
Max. Storage: =889489,
Routing Table:
Computed Outflow Data:
Time;:
(min)::
nL
AmbPumpEjStt
(cfs)
Pump
(cfs).
:R.O. Inflow
(cfs)
Total:
Inflow:
(cfs)
Storage
(cf) „`;
tr Surf. EI
(ft);..
Stage
-(ft)
Outflow
(cfs).
Circular
Rectangular
Riser".;
``,(weir)
Of -7
;_(onfice)
'� z �
Barrel
.5 , ,:
Control
Riser.' .
(weir}` ,"(orifice,,
� Riser �
, a �- .s' �
Barrel.
.
Control
1st Stage:
Separate
Weir.
2nd Stage'
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Outflow.
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Prepared byjthompson 12/27/2005 Page 1

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Prepared by jthompson 12/27/2005
Page 2

C
1 o0-yr Routing
Prepared by jthompson 12/27/2005 Page 3

120
100
80
N
V
c
Routing Plot
Lake Waccamaw Pond 3 CPARY- por+o
50 100 150
Time (min)
Prepared by jthompson 12/27/2005
200
250
300
Page 1

y Mkrt to- yCL wTFcaJ
D(t00 Yr)
Swale Design Input Park Pond Swales Swale Calculated Output
(CIA)
d
B
Z
Start (FT)
End (FT)
Ln th S
A
P
R
Q
V
Ww
Wd
T
Swale
(CFS)
(IN)
n
(FT)
(FT)
grnd
Ditch
Diff
Grnd
Ditch
Diff
(FT) (FT/FT)
(FT^2)
(FT)
(CFS)
FT/S
(FT)
(FT)
(LB/SF)
Qa-Qr
Notes
15
256.o
4.3
0.03
8
3
60
52.7
7.3
58.00
52
6.00
700 0.0010
89.87
35.20
2.55
263.69
2.93
33.801
44.001
0.271
7.69
EM
"PARK Po.jn Ottui "
L-
n
Q