SW8041122_APPROVED PLANS_20041208

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW�(XO8
DOC TYPE
❑ CURRENT PERMIT
APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
�?604/AOS�
YYYYMMDD

STORMWATER MANAGEMENT PLAN
1 REVISIONS MADE BASED ON COMMENTS FROM NCDENR IN A LETTER DATED NOVEMBER 29, 2004.
REFER TO CATLIN'S DECEMBER 6,2004 RESPONSE LETTER.
NO. DESCRIPTION
R E V I S 1 0 N S
FOR
APAC ATLANTIC, INC.
DEPPE ASPHALT PLANT
DESIGNED BY- JF 13
DRAWN BY: WHW
CHECKED BY MEM
APPROVED BY: MEM
DATE: DECEMBER 2004
JKB
12/06/04
BY
DATE
DEPPE, N.C.
14
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UAYSYN.LE
yf1-
BELGWE
DEPPE
a
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a
SITE
5LAL
027952
2K.
-
SITE LOCATION MAP
NOT TO SCALE
P..£ DJ3
m 1917
WILMINGTON, NORTH CAROLINA
PROJECT
STORMWATER MANAGEMENT PLAN
FOR
APAC—ATLANTIC, INC. DEPPE ASPHALT PLANT
DEPPE, N.C.
TITLE
U�
APPROVED
N0 ?7H CAROLINA E HRONNUINTAL
MANAGEMENT COMMISSION
DIVISION OF WATER QUALITY
) I?- oc- C- Zcx%�-
COVER SHEET
SCALE: NO SCALE I `OB NO.
two 2Z
204064-01-01
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OCT 04 SWP-204064-01-01

GENERAL NOTES
R/W -
ENTRANCE TO BE REMOVED
DURING ROAD CONSTRUCTION
CA OF ASPHALT uC N7-- - - - - EXISTING ENTRANCE-I,,
n
DRAINAGE
AREA A
• s
f w.
r Q
s
1
S
I
� 1 1
A
4
SEDIMENT BASIN A
BOTTOM ELEV. 33.0'
PERMANENT
'S I� POOL ELEV- 38.0'
►� L (SEE DETAIL SHEET
PROPOSED INLET ELEVATION =
1 REVISIONS MADE BASED ON COMMENTS FROM NCDENR IN A LETTER DATED NOVEMBER 29, 2004.
REFER TO CATLIN'S DECEMBER 6,2004 RESPONSE LETTER.
NO. DESCRIPTION
R E V I S I O N S
- - - _ CA OF ASPHALT - - - -
6.5'
bdLi
N LINK FEN
FELD
•�■■r�wl�
�wa■ff�w•�la�.aia,. w.r,Y.�ww}{■l�Tia�
•
a!�■■
P
SEDIMENT BASIN B
■
.o
BOTTOM ELEV. 31.0'
'�
PERMANANT
POOL ELEV. 36.0'
a
�.........,
(SEE DETAIL SHEET 4
i
.��
mm :
.q,DR.ems .A raw• •'+ � Q � � /
. �.. ;.,- ~.. '• n AREA B
. 41
• � a x 'z
PROP S INLET ELEVATION = 4DNIL
F
Qp
Vk
OF PAVEMENT
"PROPOSED PRINCIPAL SPILLWAY OUTFALL ELEVATION = 37.0'
PROPOSED PRINCIPAL SPILLWAY ELEVATION = 39.0'
EMERGENCY SPILLWAY ELEVATION = 41.5'
DESIGNED BY: JKB
DRAWN BY: WHW
CHECKED BY: MEM
APPROVED BY: MEM
DATE: DECEMBER 2004
JKB
12/06/04
BY
DATE
027���
. •PA
K.
L •
BRIDGE
W
<01
BOTTOM OF RAIL ROAD BED 0 }
a
yti30TTOM bp L ftAD 1 "
W `Y
4 I
,I,, PROVSED P INCIPA SPILLWAY `OUTFALL
1 PROPOSED PRINCIPAL SPILLWAY ELEVATION = 37.0'
_N ELEVATION 39.75!
As
�F-W�
L 1� 3T 10 C
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1. BOUNDARY SURVEY AND FLOOD ZONE LOCATION PROVIDED BY WILLIE MILLER LAND SURVEYING.
2. TOPOGRAPHIC SURVEY PROVIDED BY CHARLES F. RIGGS & ASSOCIATES, INC.
3. ELEVATIONS ARE FROM MEAN SEA LEVEL.
4. A 25 FEET WIDE MINIMUM VEGETATIVE BUFFER IS PROPOSED TO REMAIN IN -PLACE AROUND THE
NORTHWEST AND SOUTHWEST PROPERTY LINES. THE VEGETATION WILL BE MAINTAINED AS NEEDED.
5. ALL AREAS WITHIN THE VEGETATIVE BUFFER IS AND WILL BE AN IMPERVIOUS MATERIAL.
6. TOTAL PROPERTY ACREAGE IS 14.4 ACRES.
7. TOTAL ACREAGE FOR DRAINAGE AREA 'A' IS APPROXIMATELY 5-62 ACRES.
8. TOTAL ACREAGE FOR DRAINAGE AREA 'B' IS APPROXIMATELY 5.39 ACRES.
9. EXISTING OUTFALL LOCATION HAS NOT BEEN SURVEYED.
10- EXISTING SITE DRAINAGE IS TO THE EXISTING DITCHES WHICH DRAIN TO THE EXISTING OUTLET
LOCATION. IT IS OUR UNDERSTANDING THIS IS AN APPROVED NPDES PERMITTED OUTFALL.
11. IT IS ASSUMED THAT THE PROPOSED CONSTRUCTION WILL NOT INCREASE OUTFALL VOLUME
SINCE IMPERVIOUS AREA IS NOT INCREASING.
12. OWNERS ARE APAC-ATLANTIC, INC.
CONSTRUCTION NOTES
1. ACTIVITIES ARE PROPOSED TO BE COMPLETED IN TWO PHASES,
THE FIRST PHASE IS THE CONSTRUCTION OF THE NEW PLANT AND DRAINAGE AREA 'A' FEATURES.
THE SECOND PHASE IS THE DEMOLITION OF THE EXISTING PLANT AND CONSTRUCTION OF DRAINAGE AREA 'S' FEATURES.
2. THE EXISTING SITE ENTRANCE WILL BE UTILIZED AS CONSTRUCTION ENTRANCE.
3. TEMPORARY SEDIMENT BASIN TO BE CLEANED OUT AT END OF CONSTRUCTION AND
CONVERTED TO PERMANENT SEDIMENT BASIN.
4. EXISTING UNDERGROUND UTILITIES HAVE NOT BEEN LOCATED.
UNDERGROUND UTILITIES ARE TO BE LOCATED BY THE CONTRACTOR PRIOR TO EXCAVATION ACTIVITIES.
5. EMBANKMENT - TAKE FILL MATERIAL FROM THE AREAS APPROVED BY OWNER. IT SHOULD BE
CLEAN MINERAL SOIL, FREE OF ROOTS, WOODY VEGETATION, ROCKS AND OTHER OBJECTIONABLE
MATERIAL. SCARIFY AREAS ON WHICH FILL IS TO BE PLACED BEFORE PLACING FILL. THE FILL
MATERIAL MUST CONTAIN SUFFICIENT MOISTURE SO IT CAN BE FORMED BY HAND INTO A BALL
WITHOUT CRUMBLING. IF WATER CAN BE SQUEEZED OUT OF THE BALL, IT IS TOO WET FOR PROPER
COMPACTION. PLACE FILL MATERIAL IN 6 TO 8-INCH CONTINUOUS LAYERS OVER THE ENTIRE
LENGTH OF THE FILL AREA AND THEN COMPACT IT. COMPACTION MAY BE OBTAINED BY ROUTING
THE CONSTRUCTION HAULING EQUIPMENT OVER THE FILL SO THAT THE ENTIRE SURFACE OF EACH
LAYER IS TRAVERSED BY AT LEAST ONE WHEEL OR TREAD TRACK OF THE HEAVY EQUIPMENT, OR A
COMPACTOR MAY BE USED. CONSTRUCT THE EMBANKMENT TO AN ELEVATION 10% HIGHER THAN THE
DESIGN HEIGHT TO ALLOW FOR SETTLING.
6. SAFETY - SEDIMENT BASINS MAY ATTRACT CHILDREN AND CAN BE DANGEROUS- AVOID STEEP
SIDE SLOPES, AND FENCE AND MARK BASINS WITH WARNING SIGNS IF TRESPASSING IS LIKELY.
FOLLOW ALL STATE AND LOCAL REQUIREMENTS.
7, FOREBAY DEPTH IS 5.0 FEET IN BOTH SEDIMENT BASINS.
8. DITCH ALONG EASTERN EDGE OF PROPERTY MAY NEED TO BE REGRADED TO ALLOW
POSITIVE SLOPE IN PRINCIPLE SPILLWAY BARREL FROM SEDIMENT BASIN B.
LEGEND
SYMBOL
DESCRIPIM
:............. .
STRUCTURE (EXISTING)
STRUCTURE (UNDER CONSTRUCTION)
PROPOSED ADDITIONAL SILT FENCE
EXISTING SILT FENCE
DRAINAGE AREA DIVISION LINE
PROPOSED 25 FOOT WIDE MINIMUM VEGETATIVE BUFFER
DELINEATED WETLANDS
41
d•
J- W ro
FLOW ARROWS CONTRACTOR TO DRAMs TO
SEDIMENT BASIN AT 19 SLOPE
- m X
EDGE OF PAVEMENT (PROPOSED)
FENCE
PROPERTY LINE
-------
DITCH LINE (VEGETATED)
PPo-_ P
POWER LINE WITH POWER POLE
EIR
EXISTING IRON ROD
UP
EXSTNG IRON PIPE
EXISTING CONTOUR
60 30 0 60
SCALE IN FEET
L®
PRMCT
STORMWATER MANAGEMENT PLAN
FOR
TITLE
CONSTRUCTION SITE PLAN
��'"dscmimis
APAC-ATLANTIC, INC. DEPPE ASPHALT PLANT
2
WILMINGTON, NORTH CAROLINA
DEPPE, N.C.
SCALE: SCALE: 1 "=fi0'
RM- N0.
204064-01-02
OCT 04 204064-SWP-01-02
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NO.
DETENTION POND INLET
VEGETATED PERIMETER
SHELF
in
N _ ZEMERGENCY SPILLWAY ELEVATION_ _ _ _
--- ----- - --
Z PRINCIPAL SPILLWAY TEMPORARY POOL
- - WATER QUALITY ORIFICE ELEVATION
o - (PERMANENT POOL ELEVATION) o
ni VEGETATED o VEGETATED 04
SHELF vi T FOREBAY SHELF ,
SEDIMENT REMOVAL ELEVATION �G\;
FOREBAY SPILLWAY
(VEGETATED)
EVATION - -
EMERGENCY SPILLWAY
N 18" CMP RISER (RIP --RAP PROTECTION)
F-------------- - --- - --- _...--.----
- A- - - - `\
c \� \
VEGETATED b VEGETATED 6 VEGETATED PERIMETER
SHELF to SHELF `/j���' SHELF
SEDIMENT REMOVAL ELEVATION N�
WET DETENTION POND SECTION
NOT TO SCALE
(SEDIMENT BASINS TO BE CLEANED OUT AFTER CONSTRUCTION
AND USED AS PERMANENT WET DETENTION PONDS)
VEGETATION SPECIFICATION FOR SUBMERGED PERIMETER SHELF
(SWITCHGRASS, OR APPROVED EQUIVALENT)
TCuollo AMV 1 IAIC0 C-MAW LAI II r•U LJCI n
ROLL OUT STRIPS OF NETTING PAR,
TO THE DIRECTION OF FLOW.
JOIN STRIPS BY
AND OVERLAPPIN
GRASS LINED CHANNELS
NOT TO SCALE
VEGETATION SPECIFICATION FOR GRASS LINED CHANNEL
(TALL FESCUE, BAHAIGRASS, OR APPROVED EQUIVALENT)
REVISIONS MADE BASED ON COMMENTS FROM NCDENR IN A LETTER DATED NOVEMBER 29, 2004.
REFER TO CATLIN'S DECEMBER 6,2004 RESPONSE LETTER.
DESCRIPTION
12" CMP
SEDIMENT BASIN /WET DETENTION POND DIMENSION
DESCRIPTION
BASIN A
BASIN B
PEAKFLOW
REFER TO CALCULATION SHEETS
BASIN VOLUME
38,265 FT
31 937 FT
PERMANENT POOL SURFACE AREA
205 x68 MIN.
205 x65 MIN.
A —ELEVATION
39.0 FT
37.0 FT
B—ELEVATION
33.0 FT
31.0 FT
C—LENGTH
70.0 FT MIN.
70.0 FT MIN,
D—LENGTH
8 FT
8 FT
£—ELEVATION
42.0 FT
40.0 FT
F-•-ELEVATION
41.5 FT
39.5 FT
G—ELEVATION
37.0 FT
31.0 FT
EMERGENCY SPILLWAY
SLOPE
4�
4�
H—WIDTH
10 FT
10 FT
I —WIDTH
20 FT
20 FT
J —ELEVATION
38 FT
36 FT
DESIGNED BY: JKB
DRAWN BY: WHW
CHECKED BY: MEM
APPROVED BY: MEM
DATE: DECEMBER 2004
JKB
12/06/04
BY
1 DATE
SEEPAGE HOLES
TO CONTROL RUNOFF FROM 1" STORM
(3 - 1" DIA. HOLES -- -- ---
3d o do = 18- FLOW
SEDIMENT BASIN/WET DETENTION POND CONSTRUCTION NOTES
1_ CUT-OFF TRENCH
EXCAVATE A CUT-OFF TRENCH ALONG THE CENTERLINE OF THE EARTH FILL EMBANKMENT.
CUT THE TRENCH TO STABLE SOIL MATERIAL, BUT IN NO CASE MAKE IT LESS THAN
2 FEET DEEP. THE CUT-OFF TRENCH MUST EXTEND INTO BOTH ABUTMENTS TO AT LEAST THE
ELEVATION OF THE RISER CREST. MAKE THE MINIMUM BOTTOM WIDTH WIDE ENOUGH TO PERMIT
OPERATION OF EXCAVATION AND COMPACTION EQUIPMENT BUT IN NO CASE LESS THAN 2 FEET_
MAKE SIDE SLOPES OF THE TRENCH NO STEEPER THAN 1:1. COMPACTION REQUIREMENTS ARE THE
SAME AS THOSE FOR THE EMBANKMENT. KEEP THE TRENCH DRY DURING BACKFILLING AND
COMPACTION OPERATIONS.
2. CONDUIT SPILLWAYS
SECURELY ATTACH THE RISER TO THE BARREL OR BARREL STUB TO MAKE A WATERTIGHT
STRUCTURAL CONNECTION. SECURE ALL CONNECTIONS BETWEEN BARREL SECTIONS BY
APPROVED WATERTIGHT ASSEMBLIES. PLACE THE BARREL AND RISER ON A FIRM, SMOOTH
FOUNDATION OF IMPERVIOUS SOIL. DO NOT USE PERVIOUS MATERIAL SUCH AS SAND, GRAVEL, OR
CRUSHED STONE AS BACKFILL AROUND THE PIPE OR ANTI -SEEP COLLARS. PLACE THE FILL MATERIAL
AROUND THE PIPE SPILLWAY IN 4-INCH LAYERS AND COMPACT IT UNDER AND AROUND THE PIPE TO
AT LEAST THE SAME DENSITY AS THE ADJACENT EMBANKMENT. CARE MUST BE TAKEN NOT TO
RAISE THE PIPE FROM FIRM CONTACT WITH ITS FOUNDATION WHEN COMPACTING UNDER THE PIPE
HAUNCHES.
3. FOR SEDIMENT BASIN/WET DETENTION POND MAINTENANCE REQUIREMENTS, REFER TO WET DETENTION BASIN
SUPPLEMENT FORM SWU-102.
K.
i C SUAL
n
ANCH R O BAR SECTION A --A
ANCHOR TO BARREL
NOT TO SCALE
I , C DAM (GRASSED) —
I — RIPRAP TO EXTEND FROM SPILLWAY CREST TO OUTFALL
SEDIMENT BASIN PLAN WET DETENTION POND PLAN AND OUTLET PROTECTION
NOT TO SCALE
PIPE OUTLET TO FLAT AREA — NO WELL DEFINED CHANNEL
NOTES:
1. La IS THE LENGTH OF THE RIPRAP APRON.
2. d=1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT LESS THAN 6".
3. IN A WELL—DEFINED CHANNEL, EXTEND THE APRON UP THE CHANNEL BANKS
TO AN ELEVATION OF 6" ABOVE THE MAXIMUM TAILWATER DEPTH OR TO
THE TOP OF THE BANK, WHICHEVER IS LESS.
4. A FILTER BLANKET OR FILTER FABRIC SHOULD BE INSATALLED BETWEEN THE
RIPRAP AND SOIL FOUNDATION.
5. W=Do + La.
AVERAGE (DESIGN) WDTH
RIPRAP SECTION
TYPICAL SPILLWAY SECTION
NOT TO SCALE
PROJECT
STORMWATER MANAGEMENT PLAN
TITLE
DETAILS
LS
SHEET
APAC-ATLANTIC, INC DEPPE ASPHALT PLANT
4
WMINGTON, NORTH CAROL.INA
DEPPE, N.C.
SCALE:
JOB NO.
NO SCALE
204064-01-04
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OCT 04 SWP-204064-01-04