NCG020977_Site Plan or Diagram_20211013

TARA GROUP MINE
MINE PERMIT
TARHEEL ROAD
BLADEN COUNTY, NORTH CAROLINA
ROBESON COUNTY
SHEET INDEX
Cl COVER SHEET
Al
SITE
LOCATION MAP
SCALE: NTS
L4N
SITE DEVELOPER/OWNER
TARA GROUP
2700 NC HWY 72 WEST
LUMBERTON, NC 28358
CONTACT: CHARLES DAVID ANDREWS
C2 MINE SITE LAYOUT PLAN PHONE: [phone]
C3 DRAINAGE AREA MAP
C4 MINE MAP MARCH 2O21
C5 RECLAMATION PLAN
C6 EROSION CONTROL NOTES
RAFTING AND DESIGN
C7-11 EROSION CONTROL DETAILS0 SERVICES, INC.
C12-13 EROSION CONTROL CALCULATIONS REVISIONS
6728 Carbonton Road
Sanford, North Carolina 27330
[phone] phone
draftinganddesignCymail.com
8-5-2021 - ADI JUNE 11,2021
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
N
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project no. 2021-10

SITE DATA TABLE
OWNER: CHARLES DAVID ANDREWS
2700 NC HWY 72 WEST
LUMBERTON, NC 28358
PIN:035500316187
DEED BOOK: 0696
PAGE #: 061
TOTAL PARCEL AREA: 48.0 AC +/-
EXISTING ZONING: RA
PROPOSED USE: BORROW SOURCE
PROPOSED MINING AREAS
INTIAL PIT 7.2 AC
PIT EXPANSIONS 11.3 AC
PLANT SITE 3.3 AC
UNDISTURBED BUFFER 11.7 AC
OTHER MISC. AREA 9.3 AC
(BERMS, TEMP. DIVERSIONS, ETC.)
TOTAL PROJECT AREA 42.8 AC
150
LEGEND
CONDITIONAL USE
PERMIT BOUNDARY
WETLAND
PROPOSED PIT
BUFFER
PLANT SITE `♦ `
AFFECTED AREA
CREEK
BERM +++++++++
++++++++
EXISTING SITE ACCESS (TYP)-
EDGE MARY BETH W/GATE
PIN#:035500227319 /
ZONING: RA
O u� -y
Zsso P�
SINGLETARY MAVIS H L/E Fty oQ�
PIN#: 035500334579 CCUPIED RESIDENCE
ZONING: RA `�\� \\�' O�\� / 652 FT+/- FROM PERMIT BOUNDARY
e ti
CCUPIED RESIDENCE
\� 398 FT+/- FROM PERMIT BOUNDARY
Ry oo326P9 Ry AO00
OCCUPIED RESIDENCE
5 FT +/- FROM PERMIT BOUNDARY
++ 0' ACCESS ROAD (TYP)
+
++ + + +++++++++
+
+ +
++++++ + I I + +++ ++` 0' VEGETATIVE BERM (TYP)
+ + + I 1 + H=6.25 FT
+++++++ I I I I I I I I+++ ` SIDE SLOPE= 4:1
\ / ` +++ ++++ +++ ` ++++`+ I+ ++ + I ++IIiII++
I1IIII++
+1IIII++ `II
`
II
+ +
`
++
` 0+
' MIN` UNDISTURBED VEGE
TATIVE BUFFER (TYP)
+ I++++++++++( +I I I I I I I I I I++++25' VEGETATIVE BERM (TYP +++++ +
H=6.0 FT ++ ++
SINGLE
TARY
KODEY L. ++++++° SIDE SLOPE= 2:1 ++ PIN#035500424055
+ + + + + + ++ +ZONINGRA
+ ++FUTURE ++ ++++`+ONSTRUCTION DEBRIS BINS
COMMERCIAL DEVELOPMENT ++++++ RECYCLE AREA (TYP)++
CCUPIED RESIDENCE SIT
Yi 5.2 AC +/- PLANT++++ I I I ++++
877 ENDARY + + FUTURE I I I +
++++++
O 6-� + PIT EXPANSION +
+++ ++++0 ++ .+++++ 0'WIDE0j'. ++++
OCCUPIED RES\IDENC `p, + ++ ++ PIT ACCESS/HAUL ROAD (TYP)
'+++ ++++470FT+FROM PERMIT BOUNDARy ++
++ ++
++ ++
CCUPIED RESIDENC +++++++20
995 FT +/- FROM PERMIT BOUNDARY ++++ + ++
+++ ++ ++Oo0 ++ +++
2S-OAFFECTED AREA (TYP + + + + + + ++ + ++ + +++++ ROPOSED31.8 AC+ ++ + +++
9Q+ ++ + ++++ MINE PERMIT BOUNDARY (TYP)
C + PER BLADEN COUNTY GIS
++ + + + + +O0050L
3C+++++++ +++ +++ 42.8 AC +/-
+++++ ++ I I
++++++ +++ + + + +
++ + +++ +
+ ++++ + + + + +CCUPIED RESIDENCE `
y O� 10 + + + + + + + + + + + WETLANDS (TYP)
2�soo�'9p 2�Oo� A� 610 FT+/- FROM PERMIT
XBOUNDARY \\5211A ++++++ + +++++++ ++++ PER WETLAND SOLUTIONS, LLC.
CCUPIED RESIDENCE ��� \ ,P 0\\�G �'++++++++ + ++++ `` L OF STREAM (TYP)
�p 700 FT +/- FROM PERMIT B06NDARY ++++++++ +++++ PER WETLANDS SOLUTIONS, LLC.
CCUPIED RESIDENCE \\/ ++++++ + ++++++
2 -C' N ( 0' MIN STREAM BUFFER (TYP)
�*O 9< \ 875 FT +/- FROM PERMIT BOU RY2 +++++ ++++ FROM TOP OF BANK
02 as °�0 1 0 +++++ +
OCCUPIED RESIDENC ++++ 161 IAL T r X.30"CULVERT
0�\\�°171 TO REMAIN
FT+/ FROM PERMIT BOUNDARY ,01-1 90� `+++++++ 7.2 AC +/ +++++ + ` / FOR RECLAMATION MAINTENANCE
SOP- '0 :� ` ++++ ++++++++++ TEMPORARY BRIDGE
/ \ E�61p9 Q\�i°�\\� `+++++ +++++ NO STREAM IMPACT
CCUPIED RESIDENCE / °0 02�P ++++++ ++++
1180FT+/- FRO PER BOUNDARY OFF 60 E-' .O' \�\° `++++ +++++
°�G°h 0 21� \ e e\��°� / ++++++ 000 +++++
P' ++ +++
i \�° + + + + + N 0' MIN WETLAND BUFFER (TYP)
\� ° OCCUPIED RESIDENC / / +++ + ++++++++++ + + +
477 FT +/- FROM PERMIT BOUN ARY + + + + + + + + + + + +
pq ++ ++++++ + ++
yP°\ OgS° OCCUPIED RESIDENC / o �\� g50 F� + + + + + / �� + + + +++
+ +
\�\ 710 FT +/- FROM PERMIT BOUNDARY n �J 03 \�°' + + + /+++++++ ++-0\�\+ + + +++++ + +++0-++ / / + + + + + + +
0 Fl + + + + + + + + + + + +
y 0 O� °G� s EXISTING EXCAVATION (TYP ` + + + + + + , + + + + + + `
�\ 6 () O�, + + + + + + + + + + +
\C�\ 500 FLP PC�P0391 P o�92 �N ` ++++ ++++++ / ++++++++ +++++`
/ s p `+ + + ` 0' VEGETATIVE BERM (TYP)
+ + + + + + �+ + + + + +
e I + + + + + + H=6.25 FT
eR�g° e\� ti°�\ 440 FT+/- FROM PERMIT BOUNNDARY / �� / `UPIED RESIDENC + + + + + + + + + +
\ ` SIDE SLOPE= 4:1
+ + + + + + + + + + + +
CCUPIED RESIDENCE ;+++++/ / / ++++++++ ++++
1140 FT+/- FROM PERMIT BOUNDARY /\�O \°\�� +++ ++++ ++++
C�� od�g0 q�R 164 FT F OM PERMICCUPIETT BOUNDAACY CAEL'---o°3� 906 `� +++++ +++++
t�P�02 11yd �c`'°°Og550° PP 2�*�n \ Pv\� 5�° �P ++++ ++++
1?11
++ ++
GA0�192 ZGQ 50' MIN WETLAND BUFFER (TYP ++++ +++++
lop0
C�Fye5o6 A.� GPOp O ++++++ +++++
�\v0 55�° /?y \ �� CCUPIED RESIDENCE / ++\ . . . + +
++++ ++++
Q /\ + + + T ANSION + +
460 FT +/- FROM PERMIT BOUNDARY + + + + +
++11.3 AC
O°'O 0, s0 ! AO�y ++++++ ++++++
CCUPIED RESIDENCE ss p o0a 290 ++++ ++++++
1160 FT +/- FROM PERMIT BOUNDARY\ 9�ty�0225 �,s ++++++ +++++++, /
i 000 J
° o PO + ++ + + + + +
+
+ +�
F� + + + +
° `� +++++ ++++++,
+ 22CS0OO�'� \ `++++
+ +++,
2
e e\� 'I'dd �9 OG90 q ++++
OCCUPIED RESIDEN /y CCUPIED RESIDENCE 9�j / ;+++ ++++++/
796 FT +/- FROM PERMIT BOUNDARY q91� 703 FT+/- FROM PERMIT BOUNDARY q ✓ ++++ ++++++
�E0
20�8�9 "0Gf c'0 0�, Sy ++++
65
CCUPIED RES
1051 FT+/- FROM PERMIT BOUNDARY
0 150 300 450
Scale: 1 " = 150'
s
CCUPIED RESIDENCE \ 2G. Ouo � `++++ ++++ +
850 FT +/- FROM PERMIT BOUNDARY �y �'u� qy + + + +
\ OCCUPIED RESIDENC ` + + + +
c' o O 113 FT+/- FROM PERMIT BOUNDARY +++++ +++++
++++ + +++/
2, s
G1�`� �Fj�0,°Oip
S$�O pA. '3AW \ `++++++++
%Asti \ c�p92°0� � 2p�lNc0� 9004 `+++
" 50
rn�
U�'oV�
o
2�
Q
OCCUPIED RESIDENC
915 FT+/- FROM PERMIT BOUNDARY
OCCUPIED RESIDENC
'0 330 FT +/- FROM PERMIT BOUNDARY
c'0 �0� 1 yO �c�o
22 0 0 �0 / C Rq S9j3 9
c. a°s)C, Amoy
290
e �O -
,16
y�i
2v S'J
'G�, °o" Oq
o�GG q2 Tk �9°sue°s�A
�0 0� L�0\\\CCUPIED RESIDENCE
r,O o02 2� Frc'Ai 225 FT +/- FROM PERMIT BOUNDARY
2 0
w \ U
pO-O
> 'y Z-P GO
Lu co
Lu� \ 0Lu
\
FLu
- 0 \ \ \
u�* CCUPIED RES(DENCE
J d \ 630 FT+/- FR PERMIT BOUNDARY
w /Lu
%-OCCUPIED RESIDENCE
803 FT 4/- FROM PERMIT B061KDARY
\ BLADEN COUNTY
\ ZONING: RA
ROBESON,LACY, JR.
PIN#:035409989500
ZONING: RA
EAST HOWELLSVILLE HUNTING
PIN#:035400492663
ZONING: RA
GENERAL NOTES-
1 . EXISTING TOPO IS STATE LIDAR FROM BLADEN COUNTY GIS DATA.
2. BOUNDARY PER BLADEN COUNTY GIS.
3. STREAM LOCATION BASED ON USGS MAPPING AND AERIAL VERIFICATION.
5. SITE TO BE RECLAMATED TO MEET THE NCDEQ MINE PERMIT RECLAMATION BOND REQUIREMENTS.
SEE PHASE RECLAMATION PLANS.
6. AS PART OF THE NCDEQ MINE PERMIT THE OWNER IS REQUIRED TO BOND THE RECLAMATION OF
THE AFFECTED AREA OF PROJECT BASED ON THE STATE MINING PROGRAM REQUIRED AMOUNTS.
7. THE TEMPORARY ERECTION AND OPERATION OF PLANTS AND EQUIPMENT SHALL COMPLY WITH THE
DISTRICT DIMENSIONAL REQUIREMENTS OF THE RA ZONING DISTRICT.
8. DUST SUPPRESSION ON ACCESS ROADS AND PLANT SITE SHALL MEET THE STANDARDS SET FORTH
IN THE NCDEQ MINE PERMIT.
9. A PROPOSED 50 FOOT WIDE MINIMUM UNDISTURBED BUFFER WITH AN ADDITIONAL 50 FT WIDE x 6.25
FT HIGH VEGETATED BERM FOR A TOTAL OF 100 FOOT MINIMUM BUFFER WILL BE MAINTAINED
BETWEEN THE EXCAVATION AND ANY ADJOINING PROPERTY BOUNDARY.
10. WETLAND AND STREAM LOCATIONS PER WETLAND SOLUTIONS, LLC.
OCCUPIED RESIDEN
1101 FT+/- FROM PERMIT BOUNDAI
/ ROMERO HEIDI / \
PIN#:035500511868 /\ V
ZONING: RA
OCCUPIED RESIDENC
916 FT+/- FROM PERMIT BOUNDARY
CCUPIED RESIDENCE
974 FT+/- FROM PERMIT BOUNDARY
OCCUPIED RESIDENC
851 FT+/- FROM PERMIT BOUNDARY
N LISHOUS
PIN# 03
PIN#:035500514444
ZONING: RA
i
\06­
55 p51O��
PAN iON�NG F�`
OCCUPIED RESIDENC /
745 FT+/- FROM PERMIT BOUNDARY /
LESANE MILDRED
PIN#:035500501772
ZONING: RA g /
JOHNSON TERESSA LESA / J
PIN#:035500500925 = \^
ZONING: RA J
ESTERS ALTON LEE
p PIN#:035500507951
o� =U ZONING: RA
v �
cOCCUPIED RESIDENC
780 FT+/- FROM PERMIT BOUNDARY
MIN UNDISTURBED VEGETATIVE BUFFER (TYP)
\ OCCUPIED RESIDENC
X
860 FT +/- FROM PERMIT BOUNDARY
LUVEE FARMS LLC
PIN#:035400494592
ZONING: RA
LUVEE FARMS LLC
PIN#:035400591950
ZONING: RA
WHITE MAGAILL D
PIN#.035500600621
ZONING: RA
WRAY HERBERT
PIN#:035500505346
ZONING: RA
VIA
LKINS BARBARA MONROE
PIN#-035400498257
/
ZONING: RA
/
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina
27330
[phone] phone
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
Drawn by:
1"=150'
MTB
Sheet:
Designed by:
MTB
C2
of 13
Reviewed by:
MTB
Project Number:
Date:
DDS JOB #: 2021-10
MAR 2021
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120
0 120 240 360
Scale: 1" = 120'
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3.7 AC
DA #101
\ \� 21.8 AC
\ \ -DA #2
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\ / \ 5.5 AC +l -
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— -124 / / W / / -
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122 W WW W I \
720NW W W % l J DA #102
5.6 AC
-199
-1245 / \
,128-129
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1.2 A2 +/-
/ 130 /
132
131�
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DA #6
3.6 AC +/-
DA #103
6.2 AC j
DA #7
1.9 AC +/-
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RAFTING AND DESIGN o
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina
27330
[phone] phone
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
Drawn by:
1"=120'
MTB
Sheet:
Designed by:
MTB
C3
of 13
Reviewed by:
MTB
Project Number:
Date:
DDS JOB #: 2021-10
MAR 2021
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CONSTRUCTION SEQUENCE MINING ACTIVITY
PHASE 1 - INITIAL PIT
1. PRIOR TO COMMENCEMENT OF CONSTRUCTION ACTIVITIES CONTACT NCDEQ LAND QUALITY SECTION [phone].
2. INSTALL CONSTRUCTION ENTRANCE ON TARHEEL ROAD.
3. INSTALL SILT FENCE PER PLAN BELOW ALL BERMS, PERMANENT/TEMPORARY DIVERSIONS, AND BASIN/TRAPS W/ SILT FENCE OUTLETS IN LOW
AREAS PER PLAN.
4. INSTALL SEDIMENT BASIN #1. STABILIZE AND SEED ALL SLOPES IMMEDIATELY. ONLY CLEAR AS NECESSARY TO INSTALL BASINS. MAINTAIN SILT
FENCE AND SILT FENCE OUTLETS DOWN STREAM UNTIL GOOD GROUND COVER IS ESTABLISHED.
5. INSTALL TEMPORARY DIVERSIONS. STABILIZE AND SEED ALL SLOPES IMMEDIATELY. ONLY CLEAR AS NECESSARY TO INSTALL DIVERSIONS. MAINTAIN
SILT FENCE AND SILT FENCE OUTLETS DOWN STREAM UNTIL TEMPORARY/PERMANENT LINING, AND GOOD GROUND COVER ON FILL SLOPES IS
ESTABLISHED.
6. INSTALL PLANT SITE W/ BERMS AND BEGIN REMOVAL OF OVERBURDEN FROM PIT.
7. NO CONSTRUCTION DEBRIS WILL BE BROUGHT ONTO THE SITE FOR RECYCLING AND SALE UNTIL FIRST APPROVED BY BOTH DEMLR AND DWM.
DEBRIS BINS WILL BE INSTALLED IN COMFORMANCE WITH SUCH APPROVALS. SUCH DEBRIS WILL BE PROCESSED AND STORED ON TOP OF THE
GROUND UNTIL SOLD. ANY UNSOLD DEBRIS WILL BE REMOVED AND PROPERLY DISPOSED OFFSITE. NO DEBRIS WILL BE DISPOSED IN THE MINE
EXCAVATIONS NOR BURIED WITHIN THE MINING PERMIT BOUNDARY.
8. INSTALL PERMANENT AND TEMPORARY BERMS AROUND PIT.
9. MAINTAIN SILT FENCE UNTIL BERMS ARE STABILIZED AND SEEDED AROUND PLANT SITE AND EXCAVATION AREA. REMOVE TEMPORARY DIVERSIONS
AND TEMPORARY SKIMMER BASINS ONCE POSITIVE DRAINAGE IS ACHIEVED TO THE PIT. MAINTAIN ALL DOWNSTREAM DIVERSIONS AND SILT FENCE
UNTIL GOOD GROUND COVER IS ESTABLISHED.
10. ONCE GOOD GROUND COVER IS ESTABLISHED AND NO RUTTING OF SLOPES IS OCCURRING REMOVE ALL EROSION CONTROL MEASURES WHILE
MAINTAINING SILT FENCE ON DOWNSTREAM SIDE.
11. BEGIN MINING ACTIVITIES.
PHASE 2 - PIT EXPANSION
1. THE EXISTING STREAM CROSSING WITH 30" CULVERT TO REMAIN FOR RECLAMATION MAINTENANCE.
2. INSTALL TEMPORARY BRIDGE ACROSS STREAM WITH APPROPRIATE EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN ON SHEET C11.
3. INSTALL SILT FENCE PER PLAN BELOW ALL BERMS, PERMANENT/TEMPORARY DIVERSIONS, AND BASIN/TRAPS W/ SILT FENCE OUTLETS IN LOW
AREAS PER PLAN.
4. INSTALL SKIMMER BASIN #2&3. STABILIZE AND SEED ALL SLOPES IMMEDIATELY. ONLY CLEAR AS NECESSARY TO INSTALL BASINS. MAINTAIN SILT
FENCE AND SILT FENCE OUTLETS DOWN STREAM UNTIL GOOD GROUND COVER IS ESTABLISHED.
5. INSTALL TEMPORARY DIVERSIONS. STABILIZE AND SEED ALL SLOPES IMMEDIATELY. ONLY CLEAR AS NECESSARY TO INSTALL DIVERSIONS. MAINTAIN
SILT FENCE AND SILT FENCE OUTLETS DOWN STREAM UNTIL TEMPORARY/PERMANENT LINING, AND GOOD GROUND COVER ON FILL SLOPES IS
ESTABLISHED.
6. INSTALL PERMANENT AND TEMPORARY BERMS AROUND PIT.
7. MAINTAIN SILT FENCE UNTIL BERMS ARE STABILIZED AND SEEDED AROUND EXCAVATION AREA. REMOVE TEMPORARY DIVERSIONS AND
TEMPORARY SKIMMER BASINS ONCE POSITIVE DRAINAGE IS ACHIEVED TO THE PIT. MAINTAIN ALL DOWNSTREAM DIVERSIONS AND SILT FENCE UNTIL
GOOD GROUND COVER IS ESTABLISHED.
8. ONCE GOOD GROUND COVER IS ESTABLISHED AND NO RUTTING OF SLOPES IS OCCURRING REMOVE ALL EROSION CONTROL MEASURES WHILE
MAINTAINING SILT FENCE ON DOWNSTREAM SIDE.
9. BEGIN MINING ACTIVITIES.
PHASE 3 - MINING PLANT SITE
1. ALL DEBRIS AND DEBRIS BINS WILL BE REMOVED AND PROPERLY DISPOSED OFFSITE PRIOR TO MINING THE PLANT AREA. NO DEBRIS WILL BE
PLACED IN THE MINE EXCAVATION. IF THE PLANT AREA IS NOT MINED, THE DEBRIS AND DEBRIS BINS WILL BE REMOVED FROM THE SITE AND ALL
AFFECTED AREAS IN AND AROUND THE PLANT SITE WILL BE PROPERLY GRADED AND PERMANENTLY STABILIZED WITH GROUNDCOVER.
2. ALL MATERIAL WILL BE EXCAVATED AND REMOVED WITH MINIMUM STOCKPILE AREAS.
ALL PHASES
1. AS EXCAVATION AREA IS EXPANDED POSITIVE DRAINAGE TO BE MAINTAINED TO EXCAVATION PIT.
2. TEMPORARY SEED STOCKPILE AREAS THAT WILL BE DENUDED FOR 30 DAYS OR MORE.
3. MAINTAIN SILT FENCE AFTER MAJOR RAIN EVENTS.
4. STABILIZE AND SEED ALL DENUDED AREAS IN WHICH WORK WILL NOT RECOMMENCE WITHIN 7 WORKING DAYS OR 14 CALENDAR DAYS.
5. MAINTAIN ALL EROSION CONTROL DEVICES WEEKLY AND AFTER MAJOR STORM EVENTS.
6. DEWATER ALL SEDIMENT BASINS AND SKIMMER BASINS FOR MAINTANANCE AND REMOVAL WITH SILT BAG
PER DETAIL, IF NEEDED.
7. CALL NCDEQ LAND QUALITY SECTION FOR INSPECTION [phone].
DISTURBED AREAS
TAILINGS/SEDIMENT PONDS 1.4 AC
STOCKPILES 0.9 AC
PROCESSING AREA/HAUL ROADS 1.0 AC
MINE EXCAVATION 19.2 AC
OTHER MISC EXCAVATION 9.3 AC
(BERMS, DIVERSIONS, ETC.)
TOTAL AFFECTED AREA 31.8 AC
INTERNAL DRAINAGE = 26.2 AC
EXTERNAL DRAINAGE= 5.6 AC
LEGEND
PERMIT BOUNDARY
EXISTING CONTOUR
WETLAND W W W W
W W W W W
BUFFER
AFFECTED AREA
CREEK
BERM •••••
POND
SILTFENCE (TYP)
SF SF
=IS =IS =IS =IS =IS AS
30'x100' CONSTRUCTION ENT
OPPi
FUTURE
COMMERCIAL DEVELOPMENT
5.2 AC +/-
/-'SILT FENCE (TYP
i -13 \ /
2:1 MAX SIDE SLOPES (TYP) i
\ +
NOTES:
STABLIZE AND SEED ALL SLOPES PER NCDEQ STANDARDS
FOR TIME FRAMES FOR DENUDED SLOPES
INSTALL SILT FENCE PER SILT FENCE DETAIL
TOPSOIL SHALL BE PLACED WITH 3:1 MAX SLOPES
ALL SLOPES SHALL BE STABILIZED AND PERMANENTLY SEEDED AT 10 FT HEIGHT
EROSION CONTROL LEGEND
TOP OF BERM
SEDIMENT BASIN
WIER ti�RAFFLFS
ROCK CHECK DAMS -
SILT FENCE SF
TEMPORARY DIVERSION DITCH
OUTLET PROTECTION
J-HOOK W/ SILT FENCE OUTLET
SILT FENCE OUTLET
STOCKPILE AREA (TYP1
PROPOSED BASIN TABLE
BASIN ID TOP WEIR BOTTOM POOL
TOP
WEIR BOTTOM
VOLUME VOLUME WEIR WEIR WIER RISER
BARREL
RISER
SKIMMER SKIMMER BAFFLES
DIM DIM DIM DEPTH
EL.
EL.
EL.
REQUIRED PROPOSED LENGTH DEPTH LINING SIZE
SIZE
BASE
ORFICE SIZE
SB#1 189x366 177X354 147x324 5
130.0
128.0
125.0
79920 CIF 275715 CIF NO OUTLET - NO DISCHARGE
/ SK#2 67x122 55X110 37x92 3
129.0
127.0
125.0
10080 CIF 14181 CIF 10.0 2.0 CLASS A NA
NA
NA
4" 1.4" 3
SK#3 70x128 58X116 40x98 3
132.0
130.0
129.0
11160 CIF 15972 CIF 10.0 2.0 CLASS A NA
NA
NA
4" 1.51. 3
SB - SEDIMENT BASIN
SKB - SKIMMER BASIN
STABILIZE AND SEED ALL SLOPES IMMEDIATELY
EMERGENCY SPILLWAY TO BE CONSTRUCTED IN CUT
ONLY
PROPOSED DIVERSION TABLE
\ CHANNEL ID CHANNEL SLOPE
SIDE SLOPES
CHANNEL DEPTH BOTTOM WIDTH TEMPORARY LINING
PERMANENT LINING
LINING DEPTH
/ nv + + +
In + + +
`+ + +\\
+++
++
++
+++
+++
s \+++
+
++
130 ` +
129
-128
/ -127 -
/ -126_
-124
/-123 -
/ 122
� T ENCE/MTLET (TYP)-Z
\ \ CO� TERM/T/SKIMME OUTLET
/ \ O_ ICE 4 IME IS DECOMMI SIGNED
SPIT D IN V ITHIN NO TLET / IP
\ \ \ 1 1 J "O T PKICIT
\ 1 \/
I ON 0 LA A
/ / l
ISPI
� / I
1 U42
1.0 %
i:I
TD#3
0.5 %
3:1
TD#4
0.5 %
3:1
TD#5
0.5 %
3:1
TD#6
0.3 %
3:1
TD#7
0.5 %
3:1
50' VEGETATIVE BERM (TYP)
H=6.25 FT
SIDE SLOPE= 4:1
MIN UNDISTURBED VEGETATIVE BUFFER (TYP)
AFFECTED AREA (TYP)
31.8 AC +/-
CONSTRUCTION DEBRIS BINS
RECYCLE AREA (TYP)
30' HAUL ROAD (TYP)
TO REMAIN UNTIL
PIT EXPANSION RECLAMATION
51 KAVV VV/ NE I I INU
bIzKIVIUUAUKA55
STRAW W/ NETTING
BERMUDAGRASS
STRAW W/ NETTING
BERMUDAGRASS
STRAW W/ NETTING
BERMUDAGRASS
STRAW W/ NETTING
BERMUDAGRASS
STRAW W/ NETTING
BERMUDAGRASS
\TE PORARY B DGE
' 1�' S N
--28 S�0" E .F'�SSING
28 L 30"
TO RTX\
\
__-1127-
-j'
128-
\
7
+
+
+
\
++++
+++
ILT FENCE (TYP)
\
+ +
++++
0' VEGETATIVE BERM (TYP)
1+1+�
H=6.25 FT
SIDE SLOPE=
4:1
MIN UNDISTURBED VEGETATIVE BUFFER (TYP)
SKIMMER
`OUTLEXPRO;�ECTION \
La=7.5'
W=3.0' \�
d=12"
STONE 0= CLASS A RIP R/7/
OMPLETE B�ERI�I AT SKIMMER OUTLET
ONCE SISFP R IS DECOMMISSIONED
PIT TO DRAIN WITHIN NO OUTLETS
\ it
\I 11CP
Scale: 1" = 120'
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina 27330
[phone] phone
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
Drawn by:
MTB
1"=120'
Sheet:
Designed by:
MTB
C4
of 13
Reviewed by:
MTB
Project Number:
Date:
DDS JOB #: 2021-10
MAR 2021
L
0

NOTES:
1. EXISTING TOPO IS STATE LIDAR FROM CUMBERLAND COUNTY GIS DATA.
2. STREAM AND WETLAND LOCATIONS BASED ON SITE DETERMINATION BY WETLANDS SOLUTIONS, LLC.
3. SITE TO BE RECLAMATED TO MEET CUMBERLAND COUNTY SECTION 919 QUARRY AND THE NCDEQ MINE PERMIT
RECLAMATION BOND REQUIREMENTS.
4. AS PART OF THE NCDEQ MINE PERMIT THE OWNER IS REQUIRED TO BOND THE RECLAMATION OF THE TOTAL
PROJECT BASED ON THE STATE MINING PROGRAM REQUIRED AMOUNTS.
5. TOPSOIL STOCKPILE MATERIAL SHALL BE USED TO PROVIDE FERTILE SOIL DURING RECLAMATION TO AID IN THE
ESTABLISHMENT OF PERMANENT GROUND COVER. UNUSED TOPSOIL MATERIAL IN THE STOCKPILE AREAS SHALL
BE REGRADED PER DETAIL TO PROVIDE STABLE SLOPES. ALL SLOPES SHALL BE PERMANENTLY STABILIZED AND
SEEDED.
6. ANY DEBRIS AND DEBRIS BINS WILL BE REMOVED AND PROPERLY DISPOSED OFFSITE PRIOR TO MINING PLANT
AREA. IF THE PLANT AREA IS NOT MINED, THE DEBRIS AND DEBRIS BINS WILL BE REMOVED FROM THE SITE AND
ALL AFFECTED AREAS IN AND AROUND THE PLANT SITE WILL BE PROPERLY GRADED AND PERMANENTLY
STABILIZED WITH GROUNDCOVER. NO DEBRIS WILL BE DISPOSED IN THE THE MINE EXCAVATIONS NOR BURIED
WITHIN THE MINING PERMIT BOUNDARY.
4 BERM 4
SLOPE ABOVE WATER LINE
SLOPE BELOW WATER LINE AT MIN 20'
.ND 10' VERTICAL DISTANCE
JUDED AREAS ABOVE WATER LINE TO
=TATED
PIT SIDE WALL RECLAMATION (TYP)
PROPOSED MINING AREAS
INTIAL PIT 7.2 AC
PIT EXPANSIONS 11.3 AC
PLANT SITE 3.3 AC
UNDISTURBED BUFFER 11.7 AC
OTHER MISC. AREA 9.3 AC
(BERMS. TEMP. DIVERSIONS, ETC.)
TOTAL PROJECT AREA 42.8 AC
DISTURBED AREAS
TAILINGS/SEDIMENT PONDS 1.4 AC
STOCKPILES 0.9 AC
PROCESSING AREA/HAUL ROADS 1.0 AC
MINE EXCAVATION 19.2 AC
OTHER MISC EXCAVATION 9.3 AC
(BERMS, DIVERSIONS, ETC.)
TOTAL AFFECTED AREA 31.8 AC
LEGEND
PERMIT BOUNDARY
EXISTING CONTOUR
PROPOSED BUFFER W W W W
W W W W W
AFFECTED AREA
CREEK
BERM """"'
POND
NTS
120 0 120
Scale: 1" = 120'
\ / / RAFTING AND DESIGN
SERVICES, INC.
SITE ENTRANCE / / / / \
W/GATE 6728 Carbonton Road
W/ REMAIN / / Sanford, North Carolina 27330
/ [phone] phone
draftinganddesignCymail.com
+ + I J
+ +
++ _ ++++ ++
+++ + + +
/ ++ +++ +++++
+++ , ++
+ + ` 12' WIDE ACCESS ROAD ALONG PIT \
` +++++ +++ + + ++++ ++ +++++ ` TO PIT EXPANSION AREA /
/ + + + + + FOR RECLAMATION MAINTENANCE.
+ r ` + + ` IF PLANT SITE AREA IS MINED
/ + + + +
/ + + ` + +
/ FUTURE+++++ ` +++++ /
\/ \ COMMERCIAL DEVELOPMENT +++++++ ` PLANT SITE `++++++ ` 3.1 MAX SLOPE
1 NIN
5.2 AC +/- ` + + + + ABOVE WATER LINE l
++++ FUTURE ` ++ ++ ` TO BE VEGETATED
++ ++ PIT EXPANSION ++ ++ \
+ +
\ �+ +` ++
+ + + /
+ +
12' WIDE ACCESS ROAD ALONG PIT I
\ \ ♦ ? +++ +++ ++++++ +++ TO PIT EXPANSION AREA-13 /
\ + + + + + ` + + + + + ` FOR RECLAMATION MAINTENANCE Q
\ + + + + + + + + + ASSUMED WATER LINE
\ + + + + + + + + + + + ^^ O
\ / ♦ + + + + / + LLI
+ + + + + + �j
\��� ♦ + + + + / + + + + 1
\ 33 ♦+ ++ ++ + LAKE ACREAGE= 9.5 AC ++4 \ z
+ + TEMPORARY DIVERSION - + + O \
-\ \ TOP OF WATER EL-124 (APPRX.} /
/ +++ ++ + / REMOVED DURING ++ ++ `�O 00 I J
MINING ACTIVITIES (TYP) STABILIZE AND SEED ALL SLOPES ` +
++ �jtl PIT SEEDED AREA=1.1 AC + + Y, \
/ ++ ++ r! _�12� o' CULVE O
/ ++++ INITIAL PIT t �,126 T REMAIN / z
/ ,y F R I�EC AMRTION TENANCE ' O
7.2 AC++ ++ ++++ + +'W TEMP RY RIDGE / \ z
++ ++ ++++ TO BE REM V D \ O L LU
�+ + + + 126 - _ ::: ' Q
rl / + + � ,l � 127 � CC
SEDIMENT BASIN +++++ / x G
128,
TO BE REMOVED DURING / + + ' W/ �/ 4 STRAND BARBED WIRE FENCE (TYP) Q
\ / \ coLU
`++ ++` MINING OPERATION �/ ++++ / 7 \ WARNING SIGNS ALONG FEN E z J
/ + + / + + + + + + + + \ \ O
LLJ
+ + + + +
- ++ ++++++ + / �+ + + + + \ \ \
a
+ + + + + W + ++++++ + ++++ z
♦ ++ + +++ \ \ W
\04 +++ + + ++++ +++
/ + + + + y W + + + + + + \ I
+ ++
+
/ \ 130 ` + + +
\ + + + + + +� / + + + + + + + \ \
\ 2 ++++++ + + + + + +
+++ \
_128 + + l ++++ ++ 1 \ \
\ ++ +++
/ +++++ SKIMMER BASIN +++++ \
\ \ — 1123 W W W / ++++ TO BE REMOVED DURING
++++ `
122 W W W W W +++++ MINING OPERATION ++++++� \ \ \
+ + + + / \
++ �
7,90 + + + + + \ SKIMMER BASI ++++++� \
+++ TO BE REMOVED DURING ++++
MINING OPERATION ++++ REVISIONS
�r \ /
,112,E ++++++ +++ /
-1245 ++++++ + \ I
26 _ ++++ PIT EXPANSION ++++ + /
+ + +� w
++++ LAKE ACREAGE= 10.2 AC ++++++ \
++++ TOP OF WATER EL=124' (APPRX.) TEMPORARY DIVERSION +++++ ��9
++++++ STABILIZE AND SEED ALL SLOPES REMOVED DURING ++++++
++++ PIT SEEDED AREA=1 .2 AC MINING ACTIVITIES (TYP) ++++++' 7�'O
+++ +++,
++ + + + +
/ 1 I ++ +++
`++ +++,
+++++ ++++++�
+ +
++ +++/
++ +++
++++ +++++++ \�3 ASSUMED WATER LINE
—132-
/ + + + + APPRX. EL-124' \
++++++ ++++ 3:1 MAX SLOPE AGENCY REVIEW ONLY
-131� ` ++++ ++++ ABOVE WATER LINE /
+ + + + � TO BE VEGETATED \ NOT FOR CONSTRUCTION
++ ++
++ ++
+ + + + +
�/ / /� I _ ++ ++ /
+ +, �� Scale: Drawn by: MTB
�_ Sheet: Designed by:
�\ 7u'O \ / MTB
Reviewed by:
240 360 \ \ / I I \ / C5 of 13 MTB
Project Number: Date:
DDS JOB #: 2021-10
MAR 2021

MAINTENANCE PLAN
THE OPERATOR IS RESPONSIBLE FOR MAINTAINING EROSION CONTROL DEVICES THROUGHOUT THE PROJECT DURATION.
ALL EROSION AND SEDIMENT CONTROL DEVICES SHALL BE CHECKED FOR STABILITY AND OPERATION FOLLOWING EVERY RUNOFF -PRODUCING
RAINFALL BUT IN NO CASE LESS THAN ONCE EVERY WEEK. ANY NEEDED REPAIRS SHALL BE MADE IMMEDIATELY TO MAINTAIN ALL DEVICES AS
DESIGNED.
SKIMMER BASINS:
1. BASINS ARE TO BE CLEANED OF SEDIMENT WHEN ITS STORAGE CAPACITY IS REDUCED BY 50%. PLACE SEDIMENT REMOVED FROM THE
BASIN IN A STOCKPILE AREA AS SHOWN ON THE PLAN OR AN AREA THAT HAS ADEQUATE EROSION CONTROL MEASURES.
2. CHECK BERM STRUCTURE, SPILLWAYS, AND SKIMMER PIPE EVERY WEEK FOR EROSION AND PIPING.
3. MAINTAIN BAFFLES AS DIRECTED BELOW.
4. ANY RIP RAP DISPLACED FROM SPILLWAY MUST BE REPLACED IMMEDIATELY.
5. AFTER ALL AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE BASIN (PHASE 2 OF CONSTRUCTION SEQUENCE) AND ALL UNSTABLE
SEDIMENT. GRADE ACCORDING TO GRADING PLAN OR BLEND IN WITH ADJACENT GRADES - ADDITIONAL COMPACTION EFFORTS MAY BE
REQUIRED IF STRUCTURE IS PROPOSED FOR THAT AREA. STABILIZE AREA.
BAFFLES:
1. MAINTAIN ACCESS TO BAFFLES. SHOULD THE FABRIC COLLAPSE, DECOMPOSE, TEAR, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY.
2. REMOVE BUILDUP SEDIMENT WHEN IT REACHES ONE-HALF FULL. TAKE CARE NOT TO DISTURB BAFFLES DURING CLEANOUT.
SILT FENCE:
1. SEDIMENT SHALL BE REMOVED FROM BEHIND THE SEDIMENT FENCE WHEN IT BECOMES ABOUT 0.5 FT DEEP AT THE FENCE. THE FENCE
SHALL BE REPAIRED AS REQUIRED TO MAINTAIN A SUFFICIENT BARRIER.
2. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, DECOMPOSE, TEAR, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY.
3. AFTER ALL AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENT. GRADE AREA
TO GRADING PLAN OR BLEND WITH ADJACENT GRADES. STABILIZE AREA.
TEMPORARY DIVERSIONS:
1. IMMEDIATELY REMOVE EXCESS SEDIMENT FROM FLOW AREA AND REPAIR DIVERSION RIDGE.
2. CAREFULLY CHECK OUTLETS AND MAKE TIMELY REPAIRS AS NEEDED.
3. AFTER ALL AREAS HAVE BEEN STABILIZED REMOVE THE RIDGE AND THE CHANNEL AND GRADE ACCORDING TO GRADING PLAN OR
BLEND WITH ADJACENT GRADES. STABILIZE AREA.
RIP RAP LINED DITCHES/CHANNELS/OUTLETS:
1. PAY CLOSE ATTENTION TO INLET AND OUTLET SECTIONS WHERE CONCENTRATED FLOW ENTERS.
2. INSPECT FOR INDICATIONS OF PIPING, SCOUR HOLES, OR BANK FAILURES. MAKE REPAIRS IMMEDIATELY.
3. MAINTAIN VEGETATION ADJACENT TO THE ROCK LINING IN A HEALTHY, VIGOROUS CONDITION TO PROTECT THE AREA FROM EROSION
AND SCOUR.
GRASS LINED DITCHES/CHANNELS/SWALES:
1. DURING GRASS ESTABLISHMENT PERIOD, INSPECT AFTER EVERY RAINFALL.
2. AFTER GRASS HAS ESTABLISHED, INSPECT PERIODICALLY AND AFTER HEAVY RAINFALL. IMMEDIATELY MAKE REPAIRS.
3. PAY CLOSE ATTENTION TO INLET AND OUTLET SECTIONS WHERE CONCENTRATED FLOW ENTERS.
4. GRASS SHOULD BE MAINTAINED IN A HEALTHY VIGOROUS CONDITION AT ALL TIMES, SINCE IT IS THE PRIMARY EROSION PROTECTION.
TEMPORARY SEEDING SCHEDULE
WINTER & EARLY SPRING
Seeding mixture
Species Rate (lb/acre)
Rye (grain) 120
Annual lespedeza (Kobe in
Piedmont and Coastal Plain,
Korean in Mountains) 50
Omit annual lespedeza when duration of temporary cover is not to
extend beyond June.
Seeding dates
Mountains —Above 2500 feet: Feb. 15 - May 15
Below 2500 feet: Feb. 1- May 1
Piedmont —Jan. 1 - May 1
Coastal Plain —Dec. 1 -Apr. 15
Soil amendments
Follow recommendations of soil tests or apply 2,000 lb/acre ground
agricultural limestone and 750 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Refertilize if growth is not fully adequate. Reseed, refertilize and mulch
immediately following erosion or other damage.
PERMANENT SEEDING SCHEDULE
SOURCE: NCDEQ EROSION CONTROL MANUAL 6.1lb
TEMPORARY SEEDING SCHEDULE
FALL
Seeding mixture
Species Rate (Ib/acre)
Rye (grain) 120
Seeding dates
Mountains —Aug. 15 - Dec. 15
Coastal Plain and Piedmont —Aug. 15 - Dec. 30
Soil amendments
Follow soil tests or apply 2,000 lb/acre ground agricultural limestone
and 1,000 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Repair and refertilize damaged areas immediately. Topdress with 50
lb/acre of nitrogen in March. If it is necessary to extent temporary
cover beyond June 15, overseed with 50 lb/acre Kobe (Piedmont and
Coastal Plain) or Korean (Mountains) lespedeza in late February or
early March.
HERBACEOUS PLANTS -Seeding recommendations for primary stabilization
Successful development depends on planting date (effectiveness goal: 6 mo. - 3 yrs. without an ongoing maintenance program) Table 6.11.b
unu Mwr!Vc Tteer•ree
—
Optimal Plantin 3 Dates
Common Name
Botanical Name !
Cultivar
Native /
introduced
Broadcast
Seeding
Rates
Ibs/acm
Fartilization/
limestone
Ibslacre
Mountains
Piedmont
Coastal
Plains
SunlShade
tolerant
Wetlands
Riparian
Buffers
Invasive
Yesorho
Installation / Maintenance
Considerations
Other information, commentary
Sericea Lespedeza
Lespedeze cuneata
1
15 lbs
By soil test
911 - 6/1
9/1 -511
10/1-4/1
Sun
NR
NR
Yes
Responds wall to controlled
burns
Severe Threat
Invasive species
-
-----LHightycompatitive,-------
-- --
- --- ---
Crown Vetch
--------
Secu ' era varia
- ---
I
-- -
15 Ibs
- --
B soil Pest
-_—.
3l15-4/30
-._-...---
NR
NR
--
Sun
--
NR
NR
Yes
neutral so
Prefers neutral soNs
------"-"--
----
---
-
-
-
--Ian
ecommended
acceptable aflematfve
is not available.
Centie�de Grass
Eremoch/oa ophiuroi.I
5 Ibs
Boil test
NR_
Eastern
9/1 .511
Sun
_ NR
NR -_
No
Si nifim nt maintenance -
Dces not tolerate high ttafriic___
10 Ibs. for road shoulders
onl
mayberequirecitu obtain
Acceptable for sodding
desired cover
KY 31 Tall Fescue
Schedonorus phoeni
I
100 Ibs
8 soil test
8/15-6l1
9/1-4/15
9/30-3/15
Sun!
NR
NR
Yes
If utilized, it is imperative
Acceptable for soddin
Festuca arundmacea
mod. Shade
that maintenance includes
a containment pim
I
15lbs
Bsod-est
8h55/1
-utlized,it
-
-------
Blue Grass
Poa ratensis
sim eratve
Prefersneutralne—utral s-oi-s,-highlyKY
that maintenance indudes
corn etitive, not recommended
a containment plan
unless an acceptable alternative
-
-------
is not available.
--
--
---- --
Acce table for sodding
Hard Fescue
Festuca kTvipfla -
I
15 Ibs
Bay soil test
311 - 6/1
NR
NR
Shade
NR
NR _
_- No _
Not recommended for
Low" growing, bunchgrass -
frestuca to ifolia
-
slopes greater than 5%
Bermuda Grass
C rrodon dac on
I
25lbs
B soil test
NR
4115 fi(30
4/15 6/30
Sun
NR
NR
Yes
If utilized, a Is imperative
Extreme aggressive, sh, not
that maintenance includes
recommended and should be
a comain-Lp an -
avoided unless an acc�!ptable
alternative Is not available.
May be sodded or spr__gged
TEMPORARY SEEDING
PROVIDE TEMPORARY SEEDING TO ALL DENUDED AREAS THAT WILL NOT BE BROUGHT TO FINAL GRADE WITHIN THE FOLLOWING SCHEDULE:
PERMANENT DITCHES --> IMMEDIATELY (ROCK LINED)
SLOPES 4:1 OR STEEPER --> 7 DAYS
ALL OTHER AREAS --> 14 DAYS
IF SOILS BECOME COMPACTED DURING GRADING, LOOSEN THEM TO A DEPTH OF 6-8 INCHES.
SEEDBED PREPARATION:
LIME: APPLY LIME ACCORDING TO SOIL TEST RECOMMENDATIONS. IF THE SOIL PH IS NOT KNOWN, APPLY AT A RATE OF 1 TO 1 %2 TONS PER
ACRE ON COARSE -TEXTURED SOILS AND 2-3 TONS PER ACRE OF FINE -TEXTURED SOILS. APPLY LIME UNIFORMLY AND INCORPORATE INTO
THE TOP 4-6 INCHES OF SOIL. SOILS WITH PH HIGHER THAN 6 DO NOT NEED LIME.
FERTILIZER: FERTILIZE ACCORDING TO SOIL TEST RECOMMENDATIONS. WHERE SOIL TESTS ARE NOT AVAILABLE, APPLY A 10-10-10 GRADE
FERTILIZER AT 700-1,000 LB/ACRE. INCORPORATE FERTILIZER INTO THE TOP 4-6 INCHES OF SOIL. IF A HYDRAULIC SEEDER IS USED, DO NOT
MIX SEED AND FERTILIZER MORE THAN 30 MINUTES BEFORE APPLICATION.
SURFACE ROUGHENING: IF AREAS TO BE SEEDED BECOME HARDENED, SEALED, OR CRUSTED, LOOSEN IT JUST PRIOR TO SEEDING BY
DISKING, RAKING, HARROWING OR OTHER SUITABLE METHODS. GROOVE OR FURROW SLOPES STEEPER THAN 3:1 ON THE CONTOUR
BEFORE SEEDING.
PLANT SELECTION:
SELECT THE APPROPRIATE SPECIES BASED ON THE PLANTING SEASON.
SEEDING:
APPLY SEED WITH A BROADCAST SEEDER, DRILL, CULTIPACKER SEEDER, OR HYDROSEEDER. USE SEEDING RATES GIVEN IN TABLES.
BROADCAST SEEDING AND HYDROSEEDING IS ACCEPTABLE ON STEEP SLOPES WHERE EQUIPMENT CANNOT BE DRIVEN. HAND
BROADCASTING IS NOT RECOMMENDED.
SMALL GRAINS SHOULD BE PLANTED NO MORE THAN ONE INCH DEEP AND GRASSES AND LEGUMES ON MORE THAN Y INCH. BROADCAST
SEED MUST BE COVERED BY RAKING OR CHAIN DRAGGING, AND THEN LIGHTLY FIRMED WITH A ROLLER OR CULTIPACKER. HYDROSEEDED
MIXTURES SHOULD NOT INCLUDE A WOOD FIBER MULCH.
MULCHING:
MULCHING IS REQUIRED FOR ALL TEMPORARY SEEDING AT A MIN RATE OF 2 TONS/ACRE WITH ASPHALT TACK.
MAINTENANCE:
CONTRACTOR TO MONITOR GRASS ESTABLISHMENT. PROMPTLY RESEEED AREAS WHERE A HEALTHY, DENSE GROWTH DOES NOT
ESTABLISH. CONTRACTOR MAY NEED TO PROVIDE NETTING OR TEMPORARY LINERS TO AREAS WHERE GRASS CANNOT BE ESTABLISHED
DUE TO EROSION.
TEMPORARY SEEDING SCHEDULE
SUMMER
Seeding mixture
Species Rate (lb/acre)
German millet 40
In the Piedmont and Mountains, a small -stemmed Sudangrass may be
substituted at a rate of 50 lb/acre.
Seeding dates
Mountains —May 15 - Aug. 15
Piedmont —May 1 -Aug. 15
Coastal Plain —Apr. 15 -Aug. 15
Soil amendments
Follow recommendations of soil tests or apply 2,000 lb/acre ground
agricultural limestone and 750 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Refertilize if growth is not fully adequate. Reseed, refertilize and mulch
immediately following erosion or other damage.
a
a
HERBACEOUS PLANTS -Seeding recommendations for primary stabilization
Successfull development depends on planting date (effectiveness goal: 6 mo. -3yrs. without an ongoing maintenance program) Table 6.11.c
n1ATl\/G CDGr"IGC
PERMANENT SEEDING
SEE SEEDING SCHEDULE FOR SEED TYPE AND RATE.
PROVIDE PERMANENT SEEDING TO ALL DENUDED AREAS THAT WILL NOT BE COVERED BY PAVING, BUILDINGS, OR OTHER LANDSCAPING. AREAS
RECEIVING PERMANENT VEGETATION MUST BE STABILIZED WITHIN THE FOLLOWING TIMEFRAMES AFTER FINAL GRADE IS REACHED, UNLESS
TEMPORARY STABILIZATION IS APPLIED.
PERMANENT DITCHES --> IMMEDIATELY (ROCK LINED)
SLOPES 4:1 OR STEEPER --> 7 DAYS
ALL OTHER AREAS --> 14 DAYS
COMPLETE GRADING BEFORE PREPARING SEEDBEDS. IF SOILS BECOME COMPACTED DURING GRADING, LOOSEN THEM TO A DEPTH OF 6-8
INCHES.
SEEDBED REQUIREMENTS:
THE SOIL SHOULD MEET THE FOLLOWING MINIMUM CRITERIA FOR VEGETATION ESTABLISHMENT:
• ENOUGH FINE-GRAINED (SILT AND CLAY) MATERIAL TO MAINTAIN ADEQUATE MOISTURE AND NUTRIENT SUPPLY (AVAILABLE WATER
CAPACITY OF AT LEAST 0.05 INCHES OF WATER TO 1 INCH OF SOIL
• SUFFICIENT PORE SPACE TO PERMIT ROOT PENETRATION.
• SUFFICIENT DEPTH OF SOIL TO PROVIDE AN ADEQUATE ROOT ZONE. THE DEPTH OF ROCK OR IMPERMEABLE LAYERS SUCH AS
HARDPANS SHOULD BE 12 INCHES OR MORE, EXCEPT ON SLOPES STEEPER THAN 2:1 WHERE THE ADDITION OF SOIL IS NOT FEASIBLE.
• A FAVORABLE PH RANGE FOR PLANT GROWTH, USUALLY 6.0-6.5.
• NO LARGE ROOTS, BRANCHES, STONES, LARGE CLODS OF EARTH, AND TRASH. CLODS AND STONES MAY BE LEFT ON SLOPES
STEEPER THAN 3:1 IF THEY ARE TO BE HYDROSEEDED.
IF THE ABOVE CRITERIA CANNOT BE MET, SPECIAL SOIL CONDITIONERS OR TOPSOIL MAY BE APPLIED.
SEEDBED PREPARATION:
LIME: APPLY LIME ACCORDING TO SOIL TEST RECOMMENDATIONS. IF THE SOIL PH IS NOT KNOWN, FOLLOW RATES ON THE SEEDING SPEC
TABLE.
FERTILIZER: FERTILIZE ACCORDING TO SOIL TEST RECOMMENDATIONS. WHERE SOIL TESTS ARE NOT AVAILABLE, FOLLOW RATES ON THE
SEEDING SPEC TABLE.
SURFACE ROUGHENING: IF AREAS TO BE SEEDED BECOME HARDENED, SEALED, OR CRUSTED, LOOSEN IT JUST PRIOR TO SEEDING BY
DISKING, RAKING, HARROWING OR OTHER SUITABLE METHODS. GROOVE OR FURROW SLOPES STEEPER THAN 3:1 ON THE CONTOUR
BEFORE SEEDING.
PLANT SELECTION:
SELECT THE APPROPRIATE SPECIES BASED ON THE PLANTING SEASON, SOIL TYPE, SLOPES, AND LAND USES. SEE SEEDING SPEC TABLES
IN PLANS FOR RECOMMENDED PERMANENT SEEDING MIXTURE.
SEEDING:
USE CERTIFIED SEED (INSPECTED BY THE NORTH CAROLINA CROP IMPROVEMENT ASSOCIATION).
APPLY SEED WITH A BROADCAST SEEDER, DRILL, CULTIPACKER SEEDER, OR HYDROSEEDER ON A FIRM, FRIABLE SEEDBED. USE SEEDING
RATES GIVEN IN TABLES.
WHEN USING A DRILL OR CULTIPACKER SEEDER, SMALL GRAINS SHOULD BE PLANTED NO MORE THAN ONE INCH DEEP AND GRASSES AND
LEGUMES ON MORE THAN %2 INCH.
WHEN BROADCAST SEEDING, SUBDIVIDE AREA INTO WORKABLE SECTIONS AND DETERMINE THE AMOUNT OF SEED NEEDED FOR EACH
SECTION. APPLY ONE-HALF THE SEED WHILE MOVING BACK AND FORTH ACROSS THE AREA AND APPLY THE REMAINING SEED IN THE SAME
MANNER BUT AT RIGHT ANGLES TO THE FIRST PASS. COVER SEED BY RAKING OR CHAIN DRAGGING, AND THEN LIGHTLY FIRM WITH A
ROLLER OR CULTIPACKER.
MULCH AREAS IMMEDIATELY AFTER SEEDING IN ACCORDANCE WITH RATES GIVEN IN TABLES. ANCHOR MULCH WITH NETTING OR LIQUID
ASPHALT AT A RATE OF 0.10 GALLON PER SQUARE YARD (10 GAL / 1000 SQ FT).
HYDROSEEDING:
SURFACE ROUGHENING IS REQUIRED. FINE SEEDBED PREPARATION IS NOT NECESSARY.
RATE OF WOOD FIBER APPLICATION SHOULD BE AT LEAST 4,000-6,000 LB/ACRE.
APPLY LEGUME INOCULANTS AT FOUR TIMES THE RECOMMENDED RATE WHEN ADDING INOCULANT TO HYDROSEEDER SLURRY.
APPLY LIME IN DRY FORM.
APPLICATION
STEP 1 -1/3 MULCH RATE, ALL SEEDING AND ALL INOCULANT SPREAD IN ONE DIRECTION
STEP 2 - 2/3 MULCH RATE APPLIED IN OPPOSING DIRECTION
MAINTENANCE:
IF STAND IS INADEQUATE, RE-EVALUATE PLANT CHOICE AND QUANTITIES OF LIME AND FERTILIZER. REESTABLISH THE STAND AFTER
SEEDBED PREPARATION OR OVER -SEED THE STAND. CONSIDER SEEDING TEMPORARY, ANNUAL SPECIES IF THE TIME OF YEAR IS NOT
APPROPRIATE FOR PERMANENT SEEDING.
RAFTING AND DESIGN O
SERVICES, INC_
6728 Carbonton Road
Sanford, North Carolina
[phone] phone
27330
[e-mail]
14
Z
W
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O
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
NTS
Drawn by:
M
TB
Sheet:
Designed by:
MTB
C6
of 13
Reviewed by:
MTB
Project Number:
DDS JOB #: 2021-10
Date:
MAR 2021
U

NOTE:
NCGO1 PERMIT PROVISIONS HAVE BEEN PROVIDED AS GENERAL GUIDE
WITH MINING OPERATIONS DURING THE CONSTRUCTION PORTION OF
THE PROJECT AS A BEST MANAGEMENT PRACTICE.
HOWEVER, MINING OPERATIONS ARE CURRENTLY EXEMPT FROM THESE
REQUIREMENTS UNDER THE NCG02 PERMIT.
GROUND STABILIZATION AND MATERIALS HANDLING PRACTICES FOR COMPLIANCE WITH
THE NCGO1 CONSTRUCTION GENERAL PERMIT
Implementing the details and specifications on this plan sheet will result in the construction
activity being considered compliant with the Ground Stabilization and Materials Handling
sections of the NCG01 Construction General Permit (Sections E and F, respectively). The
permittee shall comply with the Erosion and Sediment Control plan approved by the
delegated authority having jurisdiction. All details and specifications shown on this sheet
may not apply depending on site conditions and the delegated authority having jurisdiction.
SECTION E: GROUND STABILIZATION
Required Ground Stabilization Timeframes
Stabilize within this
Site Area Description
many calendar
Timeframe variations
days after ceasing
land disturbance
(a) Perimeter dikes,
swales, ditches, and
7
None
perimeter slopes
(b) High Quality Water
7
None
(HQW) Zones
(c) Slopes steeper than
If slopes are 10' or less in length and are
3:1
7
not steeper than 2:1, 14 days are
allowed
-7 days for slopes greater than 50' in
length and with slopes steeper than 4:1
-7 days for perimeter dikes, swales,
(d) Slopes 3:1 to 4:1
14
ditches, perimeter slopes and HOW
Zones
-10 days for Falls Lake Watershed
-7 days for perimeter dikes, swales,
(e) Areas with slopes
ditches, perimeter slopes and HOW Zones
flatter than 4:1
14
-10 days for Falls Lake Watershed unless
there is zero slope
Note: After the permanent cessation of construction activities, any areas with temporary
ground stabilization shall be converted to permanent ground stabilization as soon as
practicable but in no case longer than 90 calendar days after the last land disturbing
activity. Temporary ground stabilization shall be maintained in a manner to render the
surface stable against accelerated erosion until permanent ground stabilization is achieved.
GROUND STABILIZATION SPECIFICATION
Stabilize the ground sufficiently so that rain will not dislodge the soil. Use one of the
techniques in the table below:
Temporary Stabilization
Permanent Stabilization
• Temporary grass seed covered with straw or
• Permanent grass seed covered with straw or
other mulches and tackifiers
other mulches and tackifiers
• Hydroseeding
• Gectextile fabrics such as permanent soil
• Rolled erosion control products with or
reinforcement matting
without temporary grass seed
• Hydroseeding
• Appropriately applied straw or other mulch
• Shrubs or other permanent plantings covered
• Plastic sheeting
with mulch
• Uniform and evenly distributed ground cover
sufficient to restrain erosion
• Structural methods such as concrete, asphalt or
retaining walls
• Rolled erosion control products with grass seed
POLYACRYLAMIDES (PAMS) AND FLOCCULANTS
1. Select flocculants that are appropriate for the soils being exposed during
construction, selecting from the NC DWR List of Approved PAMS/Flocculants.
2. Apply flocculants at or before the inlets to Erosion and Sediment Control Measures
3. Apply flocculants at the concentrations specified in the NC DWR List of Approved
PAMS/Flocculants and in accordance with the manufacturer's instructions.
4. Provide ponding area for containment of treated Stormwater before discharging
offsite.
5. Store flocculants in leak -proof containers that are kept under storm -resistant cover
or surrounded by secondary containment structures.
EQUIPMENT AND VEHICLE MAINTENANCE
1. Maintain vehicles and equipment to prevent discharge of fluids.
2. Provide drip pans under any stored equipment.
3. Identify leaks and repair as soon as feasible, or remove leaking equipment from the
project.
4. Collect all spent fluids, store in separate containers and properly dispose as
hazardous waste (recycle when possible).
5. Remove leaking vehicles and construction equipment from service until the problem
has been corrected.
6. Bring used fuels, lubricants, coolants, hydraulic fluids and other petroleum products
to a recycling or disposal center that handles these materials.
LITTER, BUILDING MATERIAL AND LAND CLEARING WASTE
1. Never bury or burn waste. Place litter and debris in approved waste containers.
2. Provide a sufficient number and size of waste containers it dumpster, trash
receptacle) on site to contain construction and domestic wastes.
3. Locate waste containers at least 50 feet away from storm drain inlets and surface
waters unless no other alternatives are reasonably available.
4. Locate waste containers on areas that do not receive substantial amounts of runoff
from upland areas and does not drain directly to a storm drain, stream or wetland.
5. Cover waste containers at the end of each workday and before storm events or
provide secondary containment. Repair or replace damaged waste containers.
6. Anchor all lightweight items in waste containers during times of high winds.
7. Empty waste containers as needed to prevent overflow. Clean up immediately if
containers overflow.
8. Dispose waste off -site at an approved disposal facility.
9. On business days, clean up and dispose of waste in designated waste containers.
PAINT AND OTHER LIQUID WASTE
1. Do not dump paint and other liquid waste into storm drains, streams or wetlands.
2. Locate paint washouts at least 50 feet away from storm drain inlets and surface
waters unless no other alternatives are reasonably available.
3. Contain liquid wastes in a controlled area.
4. Containment must be labeled, sized and placed appropriately for the needs of site
5. Prevent the discharge of soaps, solvents, detergents and other liquid wastes from
construction sites.
PORTABLE TOILETS
1. Install portable toilets on level ground, at least 50 feet away from storm drains,
streams or wetlands unless there is no alternative reasonably available. If 50 foot
offset is not attainable, provide relocation of portable toilet behind silt fence or place
on a gravel pad and surround with sand bags.
2. Provide staking or anchoring of portable toilets during periods of high winds or in high
foot traffic areas.
3. Monitor portable toilets for leaking and properly dispose of any leaked material.
Utilize a licensed sanitary waste hauler to remove leaking portable toilets and replace
with properly operating unit.
EARTHEN STOCKPILE MANAGEMENT
1. Show stockpile locations on plans. Locate earthen -material stockpile areas at least
50 feet away from storm drain inlets, sediment basins, perimeter sediment controls
and surface waters unless it can be shown no other alternatives are reasonably
available.
2. Protect stockpile with silt fence installed along toe of slope with a minimum offset of
five feet from the toe of stockpile.
3. Provide stable stone access point when feasible.
4. Stabilize stockpile within the timeframes provided on this sheet and in accordance
with the approved plan and any additional requirements. Soil stabilization is defined
as vegetative, physical or chemical coverage techniques that will restrain accelerated
erosion on disturbed soils for temporary or permanent control needs.
ONSITE CONCRETE WASHOUT
STRUCTURE WITH LINER
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BELOW GRADE WASHOUT STRUCTURE
ABOVE GRADE WASHOUT STRUCTURE
CONCRETE WASHOUTS
1. Do not discharge concrete or cement slurry from the site.
2. Dispose of, or recycle settled, hardened concrete residue in accordance with local
and state solid waste regulations and at an approved facility.
3. Manage washout from mortar mixers in accordance with the above item and in
addition place the mixer and associated materials on impervious barrier and within
lot perimeter silt fence.
4. Install temporary concrete washouts per local requirements, where applicable. If an
alternate method or product is to be used, contact your approval authority for
review and approval. If local standard details are not available, use one of the two
types of temporary concrete washouts provided on this detail.
5. Do not use concrete washouts for dewatering or storing defective curb or sidewalk
sections. Stormwater accumulated within the washout may not be pumped into or
discharged to the storm drain system or receiving surface waters. Liquid waste must
be pumped out and removed from project.
6. Locate washouts at least 50 feet from storm drain inlets and surface waters unless it
can be shown that no other alternatives are reasonably available. At a minimum,
install protection of storm drain inlet(s) closest to the washout which could receive
spills or overflow.
7. Locate washouts in an easily accessible area, on level ground and install a stone
entrance pad in front of the washout. Additional controls may be required by the
approving authority.
8. Install at least one sign directing concrete trucks to the washout within the project
limits. Post signage on the washout itself to identify this location.
9. Remove leavings from the washout when at approximately 75% capacity to limit
overflow events. Replace the tarp, sand bags or other temporary structural
components when no longer functional. When utilizing alternative or proprietary
products, follow manufacturer's instructions.
10. At the completion of the concrete work, remove remaining leavings and dispose of
in an approved disposal facility. Fill pit, if applicable, and stabilize any disturbance
caused by removal of washout.
HERBICIDES, PESTICIDES AND RODENTICIDES
1. Store and apply herbicides, pesticides and rodenticides in accordance with label
restrictions.
2. Store herbicides, pesticides and rodenticides in their original containers with the
label, which lists directions for use, ingredients and first aid steps in case of
accidental poisoning.
3. Do not store herbicides, pesticides and rodenticides in areas where flooding is
possible or where they may spill or leak into wells, stormwater drains, ground water
or surface water. If a spill occurs, clean area immediately.
4. Do not stockpile these materials onsite.
HAZARDOUS AND TOXIC WASTE
1. Create designated hazardous waste collection areas on -site.
2. Place hazardous waste containers under cover or in secondary containment.
3. Do not store hazardous chemicals, drums or bagged materials directly on the ground.
NCGOI GROUND STABILIZATION AND MATERIALS HANDLING
PART III
SELF -INSPECTION, RECORDKEEPING AND REPORTING
SECTION A: SELF -INSPECTION
Self -inspections are required during normal business hours in accordance with the table
below. When adverse weather or site conditions would cause the safety of the inspection
personnel to be in jeopardy, the inspection may be delayed until the next business day on
which it is safe to perform the inspection. In addition, when a storm event of equal to or
greater than 1.0 inch occurs outside of normal business hours, the self -inspection shall be
performed upon the commencement of the next business day. Any time when inspections
were delayed shall be noted in the Inspection Record.
Frequency
Inspect
(during normal
Inspection records must include:
business hours)
(1) Rain gauge
Daily
Daily rainfall amounts.
maintained in
If no daily rain gauge observations are made during weekend or
good working
holiday periods, and no individual -day rainfall information is
order
available, record the cumulative rain measurement for those un-
attended days (and this will determine if a site inspection is
needed). Days on which no rainfall occurred shall be recorded as
"zero." The permittee may use another rain -monitoring device
approved by the Division.
(2) E&SC
At least once per
1. Identification of the measures inspected,
Measures
7 calendar days
2. Date and time of the inspection,
and within 24
3. Name of the person performing the inspection,
hours ofarain
4. Indication ofwhetherthe measures were operating
event> 1.0 inch in
properly,
24 hours
5. Description of maintenance needs forthe measure,
6. Description, evidence, and date of corrective actions taken.
(3) Stormwater
At least once per
1. Identification of the discharge outfalls inspected,
discharge
7 calendar days
2. Date and time of the inspection,
outfalls (SDOs)
and within 24
3. Name of the person performing the inspection,
hours of a rain
4. Evidence of indicators of stormwater pollution such as oil
event> 1.0 inch in
sheen, floating or suspended solids or discoloration,
24 hours
5. Indication of visible sediment leaving the site,
6. Description, evidence, and date of corrective actions taken.
(4) Perimeter of
At least once per
If visible sedimentation is found outside site limits, then a record
site
7 calendar days
of the following shall be made:
and within 24
1. Actions taken to clean up or stabilize the sediment that has left
hours of a rain
the site limits,
event> 1.0 Inch in
2. Description, evidence, and date of corrective actions taken, and
24 hours
3. An explanation as to the actions taken to control future
releases.
(5) Streams or
At least once per
Ifthe stream or wetland has increased visible sedimentation or a
wetlands onsite
7 calendar days
stream has visible increased turbidity from the construction
or offsite
and within 24
activity, then a record of the following shall be made:
(where
hours of a rain
1. Description, evidence and date of corrective actions taken, and
accessible)
everI 1.0 inch in
2. Records of the required reports to the appropriate Division
24 hours
Regional Office per Part III, Section C, Item (2)(a) of this permit
of this permit.
(6) Ground
After each phase
1. The phase of grading (installation of perimeter E&SC
stabilization
of grading
measures, clearing and grubbing, installation of storm
measures
drainage facilities, completion of all land -disturbing
activity, construction or redevelopment, permanent
ground cover).
2. Documentation that the required ground stabilization
measures have been provided within the required
timeframe or an assurance that they will be provided as
soon as possible.
NOTE: The rain inspection resets the required 7 calendar day inspection requirement
PART III
SELF -INSPECTION, RECORDKEEPING AND REPORTING
SECTION B: RECORDKEEPING
1. E&SC Plan Documentation
The approved E&SC plan as well as any approved deviation shall be kept on the site. The
approved E&SC plan must be kept up-to-date throughout the coverage under this permit.
The following items pertaining to the E&SC plan shall be documented in the manner
described:
Item to Document
Documentation Requirements
(a) Each E&SC Measure has been installed
Initial and date each E&SC Measure on a copy
and does not significantly deviate from the
of the approved E&SC Plan or complete, date
locations, dimensions and relative elevations
and sign an inspection report that lists each
shown on the approved E&SC Plan.
E&SC Measure shown on the approved E&SC
Plan. This documentation is required upon the
initial installation of the E&SC Measures or if
the E&SC Measures are modified after initial
installation.
(b) A phase of grading has been completed.
Initial and date a copy of the approved E&SC
Plan or complete, date and sign an inspection
report to indicate completion of the
construction phase.
(c) Ground cover is located and installed
Initial and date a copy of the approved E&SC
in accordance with the approved E&SC
Plan or complete, date and sign an inspection
Plan.
report to indicate compliance with approved
ground cover specifications.
(d) The maintenance and repair
Complete, date and sign an inspection report.
requirements for all E&SC Measures
have been performed.
(e) Corrective actions have been taken
Initial and date a copy of the approved E&SC
to E&SC Measures.
Plan or complete, date and sign an inspection
report to indicate the completion of the
corrective action.
2. Additional Documentation
In addition to the E&SC Plan documents above, the following items shall be kept on the
site
and available for agency inspectors at all times during normal business hours, unless the
Division provides a site -specific exemption based on unique site conditions that make this
requirement not practical:
(a) This general permit as well as the certificate of coverage, after it is received.
(b) Records of inspections made during the previous 30 days. The permittee shall record
the required observations on the Inspection Record Form provided by the Division or
a similar inspection form that includes all the required elements. Use of
electronically -available records in lieu of the required paper copies will be allowed if
shown to provide equal access and utility as the hard -copy records.
(c) All data used to complete the Notice of Intent and older inspection records shall be
maintained for a period of three years after project completion and made available
upon request. [40 CFR 122.411
EFFECTIVE: 04/01/19
SELF -INSPECTION, RECORDKEEPING AND REPORTING
SECTION C: REPORTING
1. Occurrences that must be reported
Permittees shall report the following occurrences:
(a) Visible sediment deposition in a stream or wetland.
(b) Oil spills if:
• They are 25 gallons or more,
• They are less than 25 gallons but cannot be cleaned up within 24 hours,
• They cause sheen on surface waters (regardless of volume), or
• They are within 100 feet of surface waters (regardless of volume).
(a) Releases of hazardous substances in excess of reportable quantities under Section 311
of the Clean Water Act (Ref: 40 CFR 110.3 and 40 CFR 117.3) or Section 102 of CERCLA
(Ref: 40 CFR 302.4) or G.S. 143-215.85.
(b) Anticipated bypasses and unanticipated bypasses.
(c) Noncompliance with the conditions of this permit that may endanger health or the
environment.
2. Reporting Timeframes and Other Requirements
After a permittee becomes aware of an occurrence that must be reported, he shall contact
the appropriate Division regional office within the timeframes and in accordance with the
other requirements listed below. Occurrences outside normal business hours may also be
reported to the Division's Emergency Response personnel at [phone], (800)
858-0368 or [phone].
Occurrence
Reporting Timeframes (After Discovery) and Other Requirements
(a) Visible sediment
a Within 24 hours, an oral or electronic notification.
deposition in a
• Within 7 calendar days, a report that contains a description of the
stream or wetland
sediment and actions taken to address the cause of the deposition_
Division staff may waive the requirement for a written report on a
case -by -case basis.
• If the stream is named on the NC 303(d) list as impaired for sediment -
related causes, the permittee may be required to perform additional
monitoring, inspections or apply more stringent practices if staff
determine that additional requirements are needed to assure compliance
with the federal or state impaired -waters conditions.
(b) Oil spills and
Within 24 hours, an oral or electronic notification. The notification
release of
shall include information about the date, time, nature, volume and
hazardous
location of the spill or release.
substances per Item
1(b)-(c) above
(c) Anticipated
• A report at least ten days before the date of the bypass, if possible.
bypasses [40 CFR
The report shall include an evaluation of the anticipated quality and
122.41(m)(3)]
effect of the bypass.
(d) Unanticipated
• Within 24 hours, an oral or electronic notification.
bypasses [40 CFR
• Within 7 calendar days, a report that includes an evaluation of the
122.41(m)(3)]
quality and effect of the bypass.
(e) Noncompliance
• Within 24 hours, an oral or electronic notification.
with the conditions
• Within 7 calendar days, a report that contains a description of the
of this permit that
noncompliance, and its causes; the period of noncompliance,
may endanger
including exact dates and times, and if the noncompliance has not
health or the
been corrected, the anticipated time noncompliance is expected to
environment[40
continue; and steps taken or planned to reduce, eliminate, and
CFR 122.41(I)(7)]
prevent reoccurrence of the noncompliance. [40 CFR 122.41(I)(6).
• Division staff may waive the requirement for a written report on a
case -by -case basis.
I NCGO1 SELF -INSPECTION, RECORDKEEPING AND REPORTING I EFFECTIVE: 04/01/19 1
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina 27330
[phone] phone
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
NTS
Drawn by:
MTB
Sheet:
Designed by:
MTB
C7
of 13
Reviewed by:
MTB
Project Number:
DDS JOB #: 2021-10
Date:
MAR 2021
L
0

13
Construction 1. Clear, grub, and strip the area under the embankment of all vegetation and
root mat. Remove all surface soil containing high amounts of organic matter
Specifications and stockpile or dispose of it properly. Haul all objectionable material to the
designated disposal area. Place temporary sediment control measures below
basin as needed
2. Ensure that fill material for the embankment is free of roots, woody
vegetation, organic matter, and other objectionable material. Place the fill in
lifts not to exceed 9 inches, and machine compact it. Over fill the embankment
6 inches to allow for settlement.
3. Shape the basin to the specified dimensions. Prevent the skimming device
from settling into the mud by excavating a shallow pit under the skimmer or
providing a low support under the skimmer of stone or timber.
4. Place the barrel (typically 4-inch Schedule 40 PVC pipe) 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. 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 the firm contact with its foundation when
compacting under the pipe haunches.
Place a minimum depth of 2 feet of compacted backfill over the pipe spillway
before crossing it with construction equipment. In no case should the pipe
conduit be installed by cutting a trench through the dam after the embankment
is complete.
5. Assemble the skimmer following the manufacturers instructions, or as
designed.
6. Lay the assembled skimmer on the bottom of the basin with the flexible
joint at the inlet of the barrel pipe. Attach the flexible joint to the barrel pipe
and position the skimmer over the excavated pit or support. Be sure to attach
a rope to the skimmer and anchor it to the side of the basin. This will be used
to pull the skimmer to the side for maintenance.
7. Earthen spillways -Install the spillway in undisturbed soil to the greatest
extent possible. The achievement of planned elevations, grade, design width,
and entrance and exit channel slopes are critical to the successful operation
of the spillway. The spillway should be lined with laminated plastic or
impermeable geotextile fabric. The fabric must be wide and long enough to
cover the bottom and sides and extend onto the top of the dam for anchoring
in a trench. The edges may be secured with 8-inch staples or pins. The fabric
must be long enough to extend down the slope and exit onto stable ground.
The width of the fabric must be one piece, not joined or spliced; otherwise
water can get under the fabric. If the length of the fabric is insufficient for the
entire length of the spillway, multiple sections, spanning the complete width,
may be used. The upper section(s) should overlap the lower section(s) so
that water cannot flow under the fabric. Secure the upper edge and sides
of the fabric in a trench with staples or pins. (Adapted from "A Manual for
Designing, Installing and Maintaining Skimmer Sediment Basins." February,
1999. J. W. Faircloth & Son.).
8. Inlets -Discharge water into the basin in a manner to prevent erosion. Use
temporary slope drains or diversions with outlet protection to divert sediment -
laden water to the upper end of the pool area to improve basin trap efficiency
(References: Runoff Control Measures and Outlet Protection).
6.64.8 Re, 6/06
DIMENSIONED AND
NOTED ON PLANS
W/ STONE LINING
Practice Standards and Specifications
9. Erosion control -Construct the structure so that the disturbed area is
minimized. Divert surface water away from bare areas. Complete the
embankment before the area is cleared. Stabilize the emergency spillway
embankment and all other disturbed areas above the crest of the principal
spillway immediately after construction (References: Surface Stabilization).
10. Install porous baffles as specified in Practice 6.65, Porous Bpjjles.
11. After all the sediment -producing areas have been permanently stabilized,
remove the structure and all the unstable sediment. Smooth the area to
blend with the adjoining areas and stabilize properly (References: Surface
Stabilization).
Maintenance Inspect skimmer sediment basins at least weekly and after each significant
(one-half inch or greater) rainfall event and repair immediately. Remove
sediment and restore the basin to its original dimensions when sediment
accumulates to one-half the height of the first baffle. Pull the skimmer to
one side so that the sediment underneath it can be excavated. Excavate the
sediment from the entire basin, not just around the skimmer or the first cell.
Make sure vegetation growing in the bottom of the basin does not hold down
the skimmer.
Repair the baffles if they are damaged. Re -anchor the baffles if water is
flowing underneath or around them.
If the skimmer is clogged with trash and there is water in the basin, usually
jerking on the rope will make the skimmer bob up and down and dislodge
the debris and restore flow. If this does not work, pull the skimmer over to
the side of the basin and remove the debris. Also check the orifice inside the
skimmer to see if it is clogged; if so remove the debris.
If the skimmer arm or barrel pipe is clogged, the orifice can be removed and
the obstruction cleared with a plumber's snake or by flushing with water. Be
sure and replace the orifice before repositioning the skimmer.
Check the fabric lined spillway for damage and make any required repairs
with fabric that spans the full width of the spillway. Check the embankment,
spillways, and outlet for erosion damage, and inspect the embankment for
piping and settlement. Make all necessary repairs immediately. Remove all
trash and other debris from the skimmer and pool areas.
Freezing weather can result in ice forming in the basin. Some special
precautions should be taken in the winter to prevent the skimmer from
plugging with ice.
Rev. 6106 6.64.9
SKIMMER/SEDIMENT BASIN
CONSTRUCTION AND MAINTAINCE PROCEDURES
PERSPECTIVE VIEW
3:1
NOTES: SLC
1. NO SILT FENCE ALLOWED. POROUS COIR FIBER BAFFLE REQUIRED.
2. DRIVE STEEL FENCE POST AT LEAST 18" INTO SOLID GROUND
3. WOOD POSTS ARE NOT ACCEPTABLE
SEDIMENT PIT
4. BAFFLES SPACED A MAXIMUM OF 8' IN FRONT
TWO-THIRDS OF SEDIMENT TRAP (CLOSEST TO RIP -RAP WEIR).
BOTTOM OF BAFFLE IN
6" X 6" TRENCH AND
FILLED WITH SOIL AND
COMPACTED
/ @ 44ATTACH COIR FIBER BAFFLE
7 A T�F TO HOG WIRE USING WIRE
OST FN
TOP OF BAFFLE SHOULD BE 6"
HIGHER THAN THE BOTTOM OF
\I l� THE SPILLWAY
HOG WIRE ATTACHED J
TO POSTS WITH LENGTHS
OF WIRE
BAFFLE INSTALLATION
Construction MATERIALS 7. Extend 9 gauge minimum high tension wire strand to side of basin or install
fiber (coir) twine woven into high steel T-posts to anchor baffle to side of basin and secure to vertical end posts as
Specifications 1. Use matting made of 100% coconut
strength matrix with the properties shown in Table 6.65a. shown in Figure 6.65b.
2. Staples should be made of 0.15 inch diameter new steel wire formed into a 8. Drape the coir fiber mat over the wire strand mounted at a height of 6 inches
` shape not less than 12 inches 2 length with a throat of 1 inch in width. The above the spillway elevation. Secure the coir fiber mat to the wire strand with
staples anchor the porous baffles into the sides and bottom the basin. plastic ties or wire fasteners. Anchor the matting to the sides and floor of the
basin with 12 inch wire staples, approximately 1 ft apart, along the bottom and
3. Ensure that steel posts for porous baffles are of a sufficient height to support side slopes of the basin.
baffles at desired height. Posts should be approximately 1-3/8" wide measured 9. Do not splice the fabric, but use a continuous piece across the basin
parallel to the fence, and have a minimum weight of 1.25 lb/linear ft. The posts
must be equipped with an anchor plate having a minimum area of 14.0 square 10. Adjustments may be required in the stapling requirements to fit individual
inches and be of the self -fastener angle steel type to have a means of retaining site conditions.
wire and coir fiber mat in the desired position without displacement.
4. Use 9-gauge high tension wire for support wire. Maintenance Inspect baffles at least once a week and after each rainfall. Make any required
Table 6.65a Specifications repairs immediately.
for Porous Baffle Material
Coir Fiber Baffle Material Property Requirements
Thickness
0.30 in. minimum
Tensile Strength (Wet)
900 x 680 lb/ft minimum
Elongation et
69% x 34% maximum
Flow Velocity
10-12 ft/sec
Weight
20 oz/SY 680 /m minimum
Minimum Width
6.5 feet
Open Area
50% maximum
Be sure to maintain access to the baffles. Should the fabric of a baffle collapse,
tear, decompose, or become ineffective, replace it promptly.
Remove sediment deposits when it reaches half full, to provide adequate
storage volume for the next rain and to reduce pressure on the baffles.
Take care to avoid damaging the baffles during cleanout and replace if damaged
during cleanout operations. Sediment depth should never exceed half the
designed storage depth.
After the contributing drainage area has been properly stabilized, remove all
CONSTRUCTION
baffle materials and unstable sediment deposits, bring the area to grade, and
1. Grade the basin so that the bottom is level front to back and side to side.
stahili7e it
2. Install the coir fiber baffles immediately upon excavation of the basins.
3. Install posts across the width of the sediment trap (Practice 6.62, Sediment
Fence).
4. Steel posts should be driven to a depth of 24 inches and spaced a maximum of
4 feet apart. The top of the fabric should be a minimum of 6 inches higher than
the invert of the spillway. Tops of baffles should be a minimum of 2 inches lower
than the top of the earthen embankment
5. Install at least three rows of baffles between the inlet and outlet discharge
point. Basins less than 20 feet in length may use 2 baffles.
6. Attach a 9 gauge high tension wire strand to the steel posts at a height of 6
inches above the spillway elevation with plastic ties or wire fasteners to prevent
sagging. If the temporary sediment basin will be converted to a permanent
stormwater basin of a greater depth, the baffle height should be based on the pool
depth during use as a temporary sediment basin.
TEMPORARY BASIN
BAFFLES
NTS
PVC END CAP
F
Practise Standards and Specifications
DewatennV-Allow the maximum reasonable detention period before the
basin is completely dewatered (at least 48 hours).
Inflow rate -Reduce the inflow velocity and divert all sediment -free
runoff.
Plan View
t
Inflow 1'
i
structure c
a
w
1.C_'1.1
TL .. . � j
1 III _ .
1
Skimmer
dewatering
device Emergency
Average _ Am*
Width W L
* Area of basin water surface at
top of principal spillway elevation
Inflow
structure
Baffles
Baffles 1' Freeboard
/ I \
Embankment
1
Sediment Cross -Section
storage zone View
Figure 6.64e Example of a sediment basin with a skimmer outlet and emergency spillway. From Pennsylvania
Erosion and Sediment Pollution Control Manual, March, 2000.
Rev. 5/13
SKIMMER BASIN
NTS
SEDIMENT BASIN #1 NO OUTLET
NTS
I VI-' VICVV
pvr ELBOW
0
END CAP
"C" ENCLOSURE
TER ENTRY UNIT
PVC VENT PIPE
\ SCHEDULE 40 PVC PIPE
(SEE PLAN FOR DIA.)
S IN SCHEDULE 40 PVC PIPE
E (SEE PLAN FOR DIA.)
FLEXIBLE HOSE
FRONT VIEW
ORIFICE PLATE
(SEE PLAN FOR DIA.)
TEE
SKIMMER DEWATERING DEVICE
NTS
1 MAX
LOPES
6.64.7
APPROACH LEVEL PORTION
CHANNEL i
FREEBOARD (1' MIN) -
SPILLWAY INVERT ELEV -
EXTEND LINER 1' BELOW
BOTTOM ELEV.
Pipe Outlet to Flat Area -
No Well-defined Channel
MINA
APPROACH
CHANNEL
CONTROL SECTION
SECTION HAS TO COINCIDE
PLAN WITH THE CENTERLINE OF THE
DAM.
WATER
SURFACE
BERM
CONTROL SECTION
EXIT SECTOR
SEE PLANS FOR LINER LENGTH
�I 20' Ir S L
LEVEL OR
GREATER 100'
PROFILE ALONG CENTERLINE
CROSS SECTION AT CONTROL SECTION
TYPICAL EXCAVATED EARTH SPILLWAY
NTS
N otes
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 ex-
tend 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 installed between
the riprap and soil foundation.
Plan Construction 1. Ensure that the subgrade for the filter and riprap follows the required lines
and grades shown in the plan. Compact any fill required in the subgrade to the
La
7 Specifications density of the surrounding undisturbed m aterial. Low areas in the subgrade on
undisturbed soil may also be filled by increasing the riprap thickness.
I=1I
2. The riprap and gravel filter must conform to the specified grading limits
Illy till shown on the plans.
Filter 3. Filter cloth, when used, must meet design requirements and be properly
Section AA blanket g q p p y
protected from punching or tearing during installation. Repair any damage by
removing the riprap and placing another piece of filter cloth over the damaged
Pipe Outlet to Well-defined area. All connecting joints should overlap so the top layer is above the
Channel downstream layer a minimum of 1 foot. If the damage is extensive, replace
the entire filter cloth.
4. Riprap maybe placed by equipment, but take care to avoid damaging the
filter.
A A 5. The minimum thickness of the riprap should be 1.5 times the maximum
Lill"
stone diameter.
6. Riprap may be field stone or rough quarry stone. It should be hard,
angular, highly weather -resistant and well graded.
7. Construct the apron on zero grade with no overfill at the end. Make the
Platop of the riprap at the downstream end level with the receiving area or slightly
below it.
8. Ensure that the apron is properly aligned with the receiving stream
and preferably straight throughout its length. I£ a curve is needed to fit site
a La conditions, place it in the upper section of the apron.
9. Imm ediately after construction, stabilize all disturbed areas with v egetation
(Practices 6. 10, Temporary Seeding, and 6.11, Permanent Seeding).
q°. III Ad-p1=
II I
Iil��:I IL1-�11� Section AA
ificant (1/2inchorgrester)Maintenance Inspectriprp outlet structuresweeklyand afersi Filter rainfall events to see if any erosion around or below the riprap has taken place,
blanket or if stones have been dislodged. Immediately make all needed repairs to
Figure 6.41c Riprap outlet protection (modified From Va Swccf. prevent further damage.
References Surface Stabilization
6.10, Temporary Seeding
6.41.4 6.11, Permanent Seeding
6.15, Riprap
Appendix
8.06, Design of Riprap Outlet Protection
Rice, C.E., Kadavy, K.0 "Riprap Design for Pipe Spillways at
-1 <TW/D <0.7" Presented at the December 13, 1994International Winter
Meeting, American Society of Agricultural Engineers, Paper Number
942541.
Rice, C.E. and K.C. Kadavy. 1994, Plunge Pool Design at Submerged Pipe
Spillway Outlets. Transactions of the ASAE 37(4):1167-1173.
FHWA. 1983. Hydralic Design of Energy Dissipaters for Culverts and
Channels. Hydraulic Engineering Circular Number 14.
OUTLET PROTECTION
NTS
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina
[phone] phone
27330
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
NTS
Drawn by:
MTB
Sheet:
Designed by:
MTB
C8
of 13
Reviewed by:
MTB
Project Number:
DDS JOB #: 2021-10
Date:
MAR 2021
L
0

Construction
1. Clear the foundation area of trees, sttnnps, roots, loose rock, and other
o bjectionable material.
Specifications
2. Excavate the cross section to the lines and grades of the foundation of the
liner as shown on the plans. Bring over -excavated areas to grade by increasing
the thickness of the liner or by backfilling with moist soil compacted to the
density of the surrounding material.
3. Concrete linings:
• Place concrete linings to the thickness shown on the plans and finish them
in a workmanlike manner.
• Take adequate precautions to protect freshly placed concrete from extreme
temperatures to ensure proper curing.
• Ensure that subgrade is moist when concrete is poured.
• Install foundation drains or weep holes where needed to protect against
uplift and piping.
• Provide transverse (contraction)jointstocontrol cracking atapproximately
20-feet intervals. These joints may be formed by using a 1/2-inch thick
removable template or by sawing to a depth of at least 1 inch.
• Install expansion joints at intervals not to exceed 100 feet.
4° Rock riprap linings: Practice 6.15, Riprap.
5. Place filters, beddings, and foundation drains to line and grade in the
manner specified. Place filter and bedding materials immediately after slope
preparation. For synthetic filter fabrics, overlap the downstream edge 1)), at
least 12 inches with the upstream edge which is buried a minimum 12 inches
in a trench. See figure 6.14a, page 6.14.6. Space anchor pins every 3 feet
along the overlap. Spread granular materials in a uniform layer. when more
than one gradation is required, spread the layers so there is minimal mixing.
Filter material should consist of at least 3 inches of material on all sides of
the drain pipe. The drain pipe conduit should be a minimum of 4 inches in
diameter. Acceptable materials include perforated, continuous, closed joint
conduits of clay, concrete, metal, plastic, or other suitable material (Practice
6.81, Subsurface Drain).
6. Perform all channel construction to keep erosion and water pollution
to a minimum. Immediately upon completion of the channel, vegetate all
disturbed areas or otherwise protect them against soil erosion. Where channel
construction will take longer than 30 days, stabilize channels by reaches.
Maintenance
Inspect channels at regular intervals as well as after major rains, and make
repairs promptly. Give special attention to the outlet and inlet sections and
other points where concentrated flow enters. Carefully check stability at road
crossings, and look for indications of piping, scour holes, or bank failures.
Make repairs immediately. Maintain all vegetation adjacent to the channel in
a healthy, vigorous condition to protect the area from erosion and scour during
out -of -bank How.
W
1 2/3 W
FILTER FABRIC OR
GRAVEL BEDDING
PARABOLIC -SHAPED WATERWAY WITH STONE CENTER DRAIN
(SHAPED BY BULLDOZER)
W
—IIIII-IIIII . 11�11 d —1I 4" to 12"
18
6" —_-III°11r=_ FILTER FABRIC OR
—II�t=11� GRAVEL BEDDING
V-SHAPED WATERWAY WITH STONE CENTER DRAIN
RIP RAP LINED TEMPORARY/PERMANENT
DIVERSION DITCH
NTS
Figure 6.17e Channel Installation and Slope Installation; Washington State Ecology Department
Longitudinal anchor
trench
Stake at 3'-5'
intervals
i
slot at 25'
intervals
Terminal slope and
channel anchor trench
(SHAPED BY MOTOR GRADER)
%
.f�f/f
FILTER FAB •-
GRAVEL BE 5ftG
TRAPEZOIDAL
Construction 1. Remove all trees, brush, stumps, and other objectionable material from the
foundation area, and dispose of properly.
Specifications
2. Excavate the channel, and shape it to neat lines and dimensions shown on
the plans plus a 0.2-foot overcut around the channel perimeter to allow for
bulking during seedbed preparations and sod buildup.
3. Remove and properly dispose of all excess soil so that surface water may
enter the channel freely.
4. The procedure used to establish grass in the channel will depend upon the
severity of the conditions and selection of species. Protect the channel with
mulch or a temporary liner sufficient to withstand anticipated velocities during
the establishment period (Appendix 8.05).
Maintenance Duringthe establishment period, check grass -lined channels afterevery rainfall.
After grass is established, periodically check the channel; check it after every
heavy rainfall event. Immediately make repairs. It is particularly important to
check the channel outlet and all road crossings for bank stability and evidence
of piping or scour holes. Remove all significant sediment accumulations to
maintain the designed carrying capacity. Keep the grass in a healthy, vigorous
condition at all times, since it is the primary erosion protection for the channel
(Practice 6.11, Permanent Seeding).
GRASS LINED TEMPORARY/PERMANENT
DIVERSION DITCH
NTS
Figure 6.97d Temporary Channel Liners; Washington State Department of Ecology
Overlap 6" min.
,fJ
•�P'r
< 4
Overcut channel 2" to allow bullring
during seedbed preparation
Intermittent check slot
Pv Shingle -lap spliced ends or begin new
Initial channel Intermittent roll in an intermittent check slot
anchor trench check slot
NOTE:
1. Check slots to be constructed per manufacturers specifications.
2. 5taking or stapling layout per manufacturers specifications.
Slope surface shall be smooth before
placement for proper soil contact.
Stapling pattern as Min. 2" -'
overla
per manufacturers
recommendations. '
r
Do not stretch blankets/matting tight -allow
the rolls to conform to any irregularities.
For slopes less than 3H:1V, rolls
may be placed in horizontal strips.
r,
If there is a berm at the top of
slope, anchor upslope of the berm.
i
- Anchor in 6"x6" min. Trench
and staple at 12" intervals.
Min. 6" overlap.
1Staple overlaps
77,"`i�. max. 5" spacing.
Bring material down to a level area,
turn the end under 4" and staple at 12"
intervals.
Lime, fertilize, and seed before installation. Planting
of shrubs, trees, etc. should occur after installation.
Prepare soil and apply seed bef
installing blankets, mats or otl'
temporary channel liner syste
Excavate channel to design
grade and cross-section
Design depth
l..+il,l'
Typical installation
with erosion control
blankets or turf
reinforcement mats
Longitudinal
anchor trench
Longitudinal anchor trench
NOTE5:
1. Design velocities exceeding 2 ft/sec require temporary blankets, mats or similar liners to protect
seed and soil until vegetation becomes established.
2. Grass -lined channels with design velocities exceeding 6 ft/sec should include turf reinforcement
mats
TEMPORARY LINING FOR
TEMPORARY/PERMANENT DIVERSION DITCH
NTS
Construction Construction
Specifications Even if properly designed, if not properly installed, RECP's will probably
not function as desired. Proper installation is imperative. Even if properly
installed, if not properly timed and nourished, vegetation will probably not
grow as desired. Proper seed/vegetation selection is also imperative.
Grade the surface of installation areas so that the ground is smooth and loose.
When seeding prior to installation, follow the steps for seed bed preparation,
soil amendments, and seeding in Surface Stabilization, 6.1. All gullies, rills,
and any other disturbed areas must be fine graded prior to installation. Spread
seed before RECP installation. (Important: Remove all large rocks, dirt clods,
stumps, roots, grass clumps, trash, and other obstructions from the soil surface
to allow for direct contact between the soil surface and the RECP.)
Terminal anchor trenches are required at RECP ends and intermittent trenches
must be constructed across channels at 25-foot intervals. Terminal anchor
trenches should be a minimum of 12 inches in depth and 6 inches in width,
while intermittent trenches need be only 6 inches deep and 6 inches wide.
Installation for Slopes— Place the RECP 2-3 feet over the top of the slope
and into an excavated end trench measuring approximately 121 inches deep
by 6 inches wide. Pin the RECP at 1 foot intervals along the bottom of the
trench, backfill, and compact. Unroll the RECP down (or along) the slope
maintaining direct contact between the soil and the RECP. Overlap adjacent
rolls a minimum of 3 inches. Pin the RECP to the ground using staples or
pins in a 3 foot center -to -center pattern. Less frequent stapling/pinning is
acceptable on moderate slopes.
Installation in Channels— Excavate terminal trenches (12 inches deep and 6
inches wide) across the channel at the upper and lower end of the lined channel
sections. At 25-foot intervals along the channel, anchor the RECP across the
channel either in 6 inch by 6 inch trenches or by installing two closely spaced
rows of anchors. Excavate longitudinal trenches 6 inches deep and wide along
channel edges (above water line) in which to bury the outside RECP edges.
Place the first RECP at the downstream end of the channel. Place the end of
the first RECP in the terminal trench and pin it at I foot intervals along the
bottom of the trench.
Note: The RECP should be placed upside down in the trench with the roll on
the downstream side of the bench.
Once pinned and back -filled, the RECP is deplo)�ed by wrapping over the
top of the trench and unrolling upstream. If the channel is wider than the
provided rolls, place ends of adjacent rolls in the terminal trench, overlapping
the adjacent rolls a minimum of 3 inches. Pin at I foot intervals, backfill, and
compact. Unroll the RECP in the upstream direction until reaching the first
intermittent trench. Fold the RECP back over itself, positioning the roll on
the downstream side of the trench, and allowing the mat to conform to the
trench.
Then pin the RECP (two layers) to the bottom of the trench, backfill, and
compact. Continue up the channel (wrapping over the top of the intermittent
trench) repeating this step at other intermittent trenches, until reaching the
upper terminal trench.
At the upper terminal trench, allow the RECP to conform to the trench,
secure with pins or staples, backfill, compact and then bring the mat back
over the top of the trench and onto the existing mat (2 to 3 feet overlap in the
downstream direction), and pin. at 1 foot intervals across the RECP. When
starting installation of a new roll, begin in a trench or shingle -lap ends of rolls
a minimum of I foot with upstream RECP on top to prevent uplifting. Place
the outside edges of the RECP(s) in longitudinal trenches, pin, back -fill, and
compact,
Anchoring Devices —I 1 gauge, at least 6 inches length by 1 inch width staples
or 12 inch minimum length wooden stakes are recommended for anchoring the
RECP to the ground.
Drive staples or pins so that the top of the staple or pin is flush with the ground
surface. Anchor each RECP every 3 feet along its center. Longitudinal
overlaps must be sufficient to accommodate a row of anchors and uniform
along the entire length of overlap and anchored every- 3 feet along the overlap
length. Roll ends may be spliced by overlapping 1 foot (in the direction of
water flow), `with the upstream/upslope mat placed on top of the downstream/
downslope RECP. This overlap should be anchored at i foot spacing across
the RECP. When installing multiple width mats heat seamed in the factory, all
factory seams and field overlaps should be similarly anchored.
PERMANENT DIVERSION BERM
NTS
TEMPORARY/PERMANENT DIVERSION DITCH
NTS
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina 27330
[phone] phone
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
Drawn by:
NTS
MTB
Sheet:
Designed by:
MTB
C9
of 13
Reviewed by:
MTB
Project Number:
Date:
DDS JOB #: 2021-10
MAR 2021
i
0

DISCHARGE LINE
FROM PUMP
SEDIMENT FILTER BAG
(BAG SIZE BASED ON MANUFACTURER'S RECOMMENDATIONS)
LAY ON 6-12" THICK BED OF 2"-3" DIA. STONE
STONE BE[,
1.3.3 Dewatering Bag Selection
Use the following steps to select an appropriately sized Dewatering Bag. Consult with the RCE to select
Dewatering Bag size if insufficient information is known about the site conditions.
1. Determine the peak flow rate generated from the dewatering pump in gallons per minute.
2. Determine the peak flow rate through the Dewatering Bag in gallons per minute based on the
Dewatering Bag peak flow rate and the total surface area provided by the manufacturer.
3. Select a Dewatering Bag that passes a minimum of two times the peak flow rate generated from the
dewatering pump as determined in Step 1 to account for a 50% clogging factor.
1.3.4 Installation
Install the Dewatering Bag on a mild slope to ensure incoming water flows downhill through the
Dewatering Bag. Secure the hose to bag connection using a heavy duty pipe clamp, rope, or other suitable
means to prevent leakage. When using a rope to attach the pump hose to the Dewatering Bag, make a
minimum of 6 wraps around the hose over a 6-inch width of the bag and fasten with a secure rope knot.
The bottom area of Dewatering Bags will not allow flow to pass through when the bag is placed on a low -
permeable or impermeable surface. Place the Dewatering Bag on an aggregate, hay bales, or other highly
permeable surface to maximize water flow through the entire surface area of the bag. Monitor the
Dewatering Bag at all times while the pump is running. While monitoring, ensure the hose to bag
connection is secure with only minimal leaking. Check for flow permeating from the bottom surface of the
Dewatering Bag. If flow appears restricted, move bag to a surface with higher permeability.
#57 STON
E,
Use the following guidelines and any specific guidelines provided by the manufacturer for Dewatering Bag
installations.
• Transport and place Dewatering Bags with care to prevent ripping or tearing the fabric.
• Avoid installing on steep slopes as the bag may roll, causing failure.
• Insert the discharge hose a minimum of 1-foot inside the Dewatering Bag.
• Do not insert more than one discharge hose into the Dewatering Bag.
• Avoid use of excessive flow rates or overfilling the Dewatering Bag. This may cause the bag to rupture
or cause failure to the hose to bag connection.
1.3.5 Removal
Dispose of the Dewatering Bag as directed by the RCE. If allowed, the Dewatering Bag may be cut open
and the contents seeded after removing the fabric. Securely tie off the pump hose connection sleeve when
transporting full Dewatering Bags for disposal . Do not clean and reuse a Dewatering Bag after the voids
are clogged with trapped sediment.
1.3.6 Inspection and Maintenance
Follow all manufacturer recommendations for inspection and maintenance guidelines. Replace Dewatering
Bags when trapped sediment has accumulated to 50% of the bag capacity or in accordance with the
manufacturer's recommendations.
Dewatering Bags are full when they no longer efficiently filter sediment or pass water at a reasonable rate.
Incoming flow rates will vary depending on the size of the Dewatering Bag, the type and amount of
sediment discharged into the Dewatering Bag, the permeability of the underlying aggregate, and the degree
of slope on which the bag lies.
SEDIMENT FILTER BAG
NTS
OVN� S`O?e
�X�gS\PIG GR
S�QQ�
MPS G GR0
2.0% MIN SLOPE
4.0% MAX SLOPE
cR
00
Opp
TEMPORARY INTERNAL SITE ROAD
NTS
INSTALLATION
1. REMOVE ALL
4 BERM 4 TREES,BRUSH
EXISTING GROUND 1 �1 EXISTING GROUND
NOTE
1. SEE PLAN SHEET C-2 FOR WIDTH
HEIGHT DETERMINED BY SIDE SLOPES.
2. WIDTH INDICATED ON PLAN IS BOTTOM
WIDTH.
3. SEED PER TEMPORARY/PERMANENT
SEEDING SCHEDULE ON SHEET C-7.
4. NATURAL VOLUNTEER VEGETATION
SHALL REMAIN.
5. BERM ENDS SHALL BE 4:1 SLOPES LIKE
SIDE SLOPES.
MAINTENANCE PLAN:
1. PUSH TOPSOIL AND UNSUITABLE MATERIAL TO
CREATE BERMS. CAP BERMS WITH TOPSOIL.
2. TRACK IN SLOPES TO ENSURE COMPACTION TO
PREVENT EROSION. STABLIZE AND SEED IMMEDIATELY.
3. STRAW AND NET OR HYDROSEED SLOPES TO
ENSURE SEED CONTACT WITH GROUND AND
GERMINATION.
4. DURING GRASS ESTABLISHMENT PERIOD, INSPECT
AFTER EVERY RAINFALL.
5. AFTER GRASS HAS ESTABLISHED, INSPECT
PERIODICALLY AND AFTER HEAVY RAINFALL.
IMMEDIATELY
MAKE REPAIRS.
6. PAY CLOSE ATTENTION TO STEEP SLOPE AREAS
BERM ENDS AND BERMS WITH DOWNHILL SLOPES
BELOW BERM.
7. GRASS SHOULD BE MAINTAINED IN A HEALTHY
VIGOROUS CONDITION AT ALL TIMES, SINCE INI'VSHE
PRIMARY EROSION PROTECTION.
VEGETATIVE BERM (TYP)
TYPICAL CORNER/BEND
FILTER FABRIC
rlLItrc
FABRIC
iartir��
A) MINIMUM WIDTH OF CONSTRUCTION ENTRANCE PAD SHALL BE 20 FT
B) STONE SHALL BE 2-3" WASHED STONE, 12" THICK.
C) THE ENTRANCE SHALL BE MAINTAINED TO PREVENT TRACKING OR FLOW-
ING OF SEDIMENT ONTO PUBLIC RIGHTS -OF -WAY. THIS MAY REQUIRE
PERIODIC TOP DRESSING WITH ADDITIONAL STONE AND REPAIR AND/OR
CLEANOUT OF ANY MEASURES USED TO TRAP SEDIMENT.
D) INSTALL PADS WHERE SHOWN ON PLANS OR OTHERWISE DIRECTED
BY ENGINEER.
CONSTRUCTION ENTRANCE PAD
NTS
CLASS "B" RIP RAP
12" NCDOT #5 or
#57 WASHED
STONE
FILTER FABRIC
24" MAX
AT CENTER
Construction 1. Place stone to the lines and dimensions shown in the plan on a filter fabric �
foundation.
Specifications L = THE DISTANCE SUCH THAT POINTS
2. Keep the center stone section at least 9 inches below natural ground level A AND BARE OF EQUAL ELEVATION
where the dam abuts the channel banks. Maintenance Inspect check dam and channels atleast weekly and after each sig fieant(1/2
3. Extend stone at least 1.5 feet beyond the ditch hank (Figure 6.$3h) to keep inch or greater) rainfall event and repair immediately. Clean out sediment,
straw, limbs, or other debris that could clog the channel when needed.
water from cutting around the ends of the check dam.
4, Set spacing between darns to assure That the elevation at the top of the Anticipate submergence and deposition above the check dam and erosion from
high flows around the edges of the dam. Correct all damage immediately. If
lower dam is the same as the toe elevation of the upper dam. significant erosion occurs between dams, additional measures can be taken
5. Protect the channel after the lowest check dam from heavy flow that could such as, installing a protective riprap liner in that portion of the channel
cause erosion. (PTactice 6.31, Riprap-line and Paved Channels).
6. Make sure that the channel reach above the most upstream dam is stable. Remove sediment accumulated behind the dams as needed to prevent damage
to channel vegetation, allow the channel to drain through the stone check dawn,
7. Ensure that other areas of the channel, such as culvert entrances below the and prevent large flows from carrying, sediment over the dam. Add stones to
check dams, are not subject to damage or blockave from displaced stones. dams as needed to maintain design height and cross section.
CHECK DAM
NTS
0
FILTER OF 1 INCH DIAMETER # 57 0
WASHED STONE
� T
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O �
NOTE:
SILT FENCE FABRIC TO OVERLAP
HARDWARE CLOTH BY 12 INCHES
STEEL FENCE POST
WIRE FENCE
HARDWARE CLOTH -
FILTER OF 1 INCH DIAMETER #
57 WASHED STONE
FLOW DIRECTION
"=111�J1=ll1�J1���111�� �-Ip I
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Ln a
II
SIDE VIEW I I
II
Li
Installation: Refer to the approved erosion control plan for location,
specifications. If silt fence is not installed correctly the first time, it v
be reconstructed. Determine the exact location of the outlet before w...L.L.LNiuLLur,
installation of the silt fence, taking into consideration:
18"
SILT FENCE FABRIC HARDWARE CLOTH
ON WIRE FENCE ON WIRE FENCE
PLAN VIEW
GRADE I STEEL FENCE POST SET
1. Installation at the lowest point(s) in the fence where water will pond.
2. Maximum allowable drainage area restriction for silt fence.
3. Installation where the outlet is accessible for installation, maintenance and
removal.
4. Placement of the outlet so that water flowing through it will not create an
erosion hazard below - avoid steep slopes below the outlet and areas
without protective vegetation. Use slope drains if necessary.
The silt fence outlet shall be installed in accordance with the standard detail, and
the approved erosion control plan.
SEDIMENT FENCE INSTALLATION USING THE SLICING METHOD
Instead of excavating a trench, placing fabric and then backfilling trench,
sediment fence may be installed using specially designed equipment that
inserts the fabric into a cut sliced in the ground with a disc (Figure 6.62b).
STEEL FENCE POST
NOTE:
USE SILT FENCE OUTLETS ONLY WHEN
DRAINAGE AREA DOES NOT EXCEED 1/4 ACRE
AND THERE IS A LOW AREA. USE AS A REPAIR
OF SILT FENCE FAILURES.
BURY WIRE FENCE, HARDWARE CLOTH, AND
FRONT VIEW SILT FENCE FABRIC 6 INCHES INTO THE
TRENCH
Maintenance Inspect sediment fences at least once a week and after each rainfall. Make any
required repairs immediately.
Should the fabric of a sediment fence collapse, tear, decompose or become
ineffective, replace it promptly.
Remove sediment deposits as necessary to provide adequate storage volume
for the next rain and to reduce pressure on the fence. Take care to avoid
undermining the fence during cleanout.
Remove all fencing materials and unstable sediment deposits and bring the
area to grade and stabilize it after the contributing drainage area has been
properly stabilized.
SILT FENCE OUTLET
NTS
Installation L The base of both end posts should be at least one foot higher than the
rriiMe of the fence. Check with a level if necessary.
Specifications
2. Install posts 4 feet apart in critical areas and 6 feet apart on standard
applications.
3. Install posts 2 feet deep on the downstream side of the silt fence, and
as close as possible to the fabric, enabling posts to support the fabric from MIN. 10 GA.
upstream water pressure. LINE WIRES
4. Install posts with the nipples facing away from the silt fabric.
5. Attach the fabric to each post with three ties, all spaced within the top S
inches of the fabric. Attach each tie diagonally 45 degrees through the fabric,
with each puncture at least 1 inch vertically apart. Also, each tie should be
positioned to hang on a post nipple when tightened to prevent sagging.
6. Wrap approximately 6 inches of fabric around the end posts and secure
with 3 ties.
7. No more than 24 inches of a 36 inch fabric is allowed above ground
level.
8. The installation should be checked and corrected for any deviations before
compaction.
9. Compaction is vitally important for effective results. Compact the soil
immediately next to the silt fence fabric with the front wheel of the tractor,
slid steer, or roller exerting at least 60 pounds per square inch. Compact the
upstream side first, and then each side twice for a total of 4 trips.
maintenance Inspect sediment fences at least once a week and after each rainfall. Make any
required repairs immediately.
Should the fabric of a sediment fence collapse, tear, decompose or become
ineffective, replace it promptly.
Remove sediment deposits as necessary to provide adequate storage volume
for the next rain and to reduce pressure on the fence. Take care to avoid
undermining the fence during cleanout.
Remove all fencing materials and unstable sediment deposits and bring the
area to grade and stabilize it after the contributing drainage area has been
properly stabilized.
8' MAX.
I I I-
ii =
lll� II FRONT VIEW" Foil
N OTE:
DOES NOT EXCEED 1/4 ACRE AND NEVER IN
AREAS OF CONCENTRATED FLOW
-USE SILT FENCE ONLY WHEN DRAINAGE AREA
-END OF SILT FENCE NEEDS TO BE TURNED UPHILL.
SILT FENCE
NTS
SECTION VIEW
ve"
TEEL POST
WOVEN WIRE FABRIC
SILT FENCE GEOTEXTILE FABRIC SLOPE
BACKFILL TRENCH
I SILT FENCE
2-1/2 GA.
MEDIATE
GRADE
" FOR REPAIR OF SILT
FENCE FAILURES, USE
No. 57 WASHED STONE.
FOR ANCHOR WHEN SIL'
FENCE IS PROTECTING
CATCH BASIN.
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina
27330
[phone] phone
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
Drawn by:
NTS
MTB
Sheet:
Designed by:
MTB
C 10 of 13
Reviewed by:
MTB
Project Number:
Date:
DDS JOB #: 2021-10
MAR 2021
L
0

D$
VEL ACCESS ROAD (TYP)
Chford R(iinr Mn[
Bracing Frame
Trursom Base PrOIQ -1
au
a '
° a: n e u d d
PERENNIAL STREAM BANK (TYP)
TOP VIEW
nd
NOTES:
DETAIL FOR ILLUSTRATION ONLY. ACTUAL DESIGN IS REQUIRED
BY BRIDGE MANUFACTURE. TO BE CONDUCTED PRIOR TO
SITE CONSTRUCTION START.
RAVEL ACCESS ROAD (TYP)
BASE PLATE FOOTING
DESIGN BY OTHERS
a
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Brai—,mg &p!t
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TYPICAL BAILEY STYLE BRIDGE DETAIL
NTS
ABUTMENT W/ WING WALLS
4.0' MIN SETBACK FROM STREAM BANK EACH SIDE (TYP)
IDGE TO SLOPE TO ONE END (TYP)
BAILEY BRIDGE OR EQUIVALENT (TYP)
DESIGN BY OTHERS
GRAVEL ACCESS ROAD (TYP)
= BASE PLATE FOOTING —III—III—III—III—I I I —III —,
DESIGN BY OTHERS III -III -III -III -III -III -I I-
I-I1I-
BRIDGE ABUTMENT W/ WING WALLS (TYP) d - — — — — — —�
DESIGN BY OTHERS d 1=III—I—I I —III —I I-
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I —III —III —III —III —I —I � III—�
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I I I=1 I—
—I 11=1 I I- 11=1 11=1 11=1 11=1 11=1 11=1 11=1 11=1 11=1 11=1 11-1 11=1 I I=
I=1 11=1 11=1 11=1 11=1 11=1 I I-1 11=i i I=1 � I —"'—
''-I I II i I II I
TYPICAL SECTION VIEW
.r.11r:10
DETAIL FOR ILLUSTRATION ON
BY BRIDGE MANUFACTURE.
BRIDGE ABUTMENTS MAY BE C
SLOPE TIES MAYBE REQUIREC
ABUTMENTS SHALL NOT BEAR
FINAL BRIDGE DESIGN TO MEE
TYPICAL BRIDGE ABUTMENT LOCATION DETAIL
NTS
F
ISOMETRIC VIEW
'P)
WENT TO DRAIN INTO PIT
RAFTING AND DESIGN O
SERVICES, INC_
6728 Carbonton Road
Sanford, North Carolina
[phone] phone
27330
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
NTS
Drawn by:
MTB
Sheet:
Designed by:
MTB
C 11 of 13
Reviewed by:
MTB
Project Number:
DDS JOB #: 2021-10
Date:
MAR 2021

Sediment Basin # 1
Skimmer Basin # 2
DA ## 2
Calculate Flow- Rational Method
Calculate Flow- Rational Method
10-Yr Storm
25-Yr Storm
10-Yr Storm
25-Yr Storm
Q10 = CIA
C=
0.30
Q25 = CIA
C= 0.30
Q10 = CIA
C= 0.3
Q25 = CIA
1=
9.54
1= 10.80
1= 9.54
Q10 = 127.07
A=
44.40
Q25 =
143.86 A= 44.40
Qi0 = 16.0272
A= 5.6
Q25 =
18.144
2-Yr Storm
Calculate Required Surface Area
Q2 = CIA
C=
0.30
1=
6.18
SA=Q25 x 325 sf/cfs
Q25 =
18.144 cfs
Q2 = 82.32
A=
44.40
SA= 5896.8
Calculate Required Surface Area
Side Slopes = 3 :1
Pond Depth= 3 ft
SA=Q25 x 435 sf/cfs
Q25 =
143.86
Basin Dims
SA- 62577.36 ft2
Weir=
55 x
110 =
6050 sf
Top =
67 x
122 =
8174 ft2
Side Slopes = 3.00 :1
Bottom =
37 x
92 =
3404 sf
Pond Depth= 5.00 ft
Volume Required
Basin Dims (Per SA)
Weir=
177.00
x
354.00
=
62658 ft2
VR=Ax1800cf/ac
A=
5.6
Top =
189
x
366
=
69174 ft2
Bottom =
147
x
324
=
47628 ft2
VR= 10080
Volume Required
Volume Proposed
VR=Ax1800 cf/ac
A=
44.40
ac
Vp=((Top Area + Bottom Area)/2)xD
Top=
6050
Bottom=
3404
VR= 79920.00 ft3
Vp= 14181
D=
3
Volume Proposed
OK
Vp=((Top Area + Bottom Area)/2)xD
Top=
62658.00
sf
Weir Sizing
Bottom=
47628.00
sf
Vp= 275715.00 ft3
D=
5.00
ft
Per AutoCad Hydraflow Software
Basin has no outlet - to be permanent pond dug
out with excavation
L=
10 ft
D=
2 ft
dwater
0.64 ft
Q25= 18.144 cfs
C= 0.3
1= 10.8
A= 5.6
Velocity= 2.37 ft/s
Weir Lining
Shear Calculation
T=yds
T= 0.399361bs/ft2
Use Class A Rip Rap
Skimmer Sizing
Calculate Dewater Time
Qd=V/Td V=
Td=
Qd= 3360
Calculate Orifice Diameter
D=sgrt((Qd/(2310sgrt(h)))
D= 1.387149
y= 62.4 lbs
dwater 0.64 ft
s= 0.01 ft/ft
10080
3 2-5 days typ
Qd= 3360
h= 1.75
Use 4 " Skimmer
Skimmer Outlet Protection
New York Method 8.06.5 Manual
Diameter of Barrel = 4.00 "
Velocity= 2.36 ft/s
Zone= 1
Skimmer Basin# 3
DA##
3
Velocity= 2.46 ft/s
Permanent Diversion/Berm#
1 =FDA# 1
Weir Lining
Calculate Flow - Rational Method
- YrStorm
Calculate Flow- Rational Method
Q,=CIA
C= 0.30
10-Yr Storm
25-Yr Storm
Shear Calculation
k 10.80 in/hr
Q10 = CIA
C=
0.3
Q25 = CIA
C= 0.3
=
Q� 11.99
A= 3.70 ac
I=
9.54
I= 10.8
T=yds
y=
62.4 lbs
Channel Slope= 0.50
Q10 = 17.7444
A=
6.2
Q25 =
20.088 A= 6.2
dwater
0.68 ft
Channel Depth= 1.50
Bottom width= 2.00
T= 0.42432 Ibs/ft2
S=
0.01 ft/ft
Side Slopes= 3.
Velociiy= 3.10
0
Calculate Required Surface Area
SoilType@ sandy loam
Slopes= 0-1096
Use Class A Rip Rap
Channel Lining
SA=Q x 325 sf/cfs
zs
Q zs =
20.088 cfs
Skimmer Sizing
Shear Calculation
SA- 6528.6
Calculate Dewater Time
T-yds
y- 62.4 lbs
dwater 0.85 ft
T= 0.2652
Ibs/ft2 s= 0.005 ft/ft
Side Slopes = 3 :1
Qd=V/Td V=
11160
Pond Depth= 3 ft
Td=
3 2-5 days typ
Temporary=
Straww/netting
Permanent=
Bermudagrass
Qd= 3720
Temporary Diversion/Berm #
2 DA # 2
Basin Dims
Weir=
58
x
116 =
6728 sf
Calculate Orifice Diameter
Calculate Flow - Rational Method
Top =
70
x
128 =
8960 ft2
25-yrstorm
D=sgrt((Qd/(2310sgrt(h)))
Qd=
3720
Q25-CIA
C= 0.30
Bottom =
40
x
98 =
3920 sf
h=
1.75
1- 10.80 in/hr
D= 1.45957
Q25 9.40
A= 2.90 ac
Volume Required
Channel Slope= 1.00
Use 4 " Skimmer
1.5 Orifice
Channel Depth= 2.00
VR=Ax1800 cf/ac
A=
6.2
Bottom width= 0.00
Side Slopes= 3.00
Outlet Protection
3.80
VelocitySkimmer
VR= 11160
lType@sandy loam
SoilTyp=
Slopes=0-10%
New York Method 8.06.5 Manual
Channel Lining
Volume Proposed
Shear Calculation
Diameter of Barrel = 4.00 "
La= 1.32 Use 7.5 ft
T-yds
y- 62.4 lbs
Vp=((Top Area + Bottom Area)/2)xD
Top=
6728
Velocity= 2.36 ft/s
W= 1 Use 3.0 ft
d water 0.89 ft
Bottom=
3920
Zone= 1
Stone Diameter= Class A
T= 0.55536
Ibs/ft2 s= 0.01ft/ft
Vp= 15972
D=
3
Temporary=
Straww/netting
Permanent=
Bermudagrass
OK
Weir Sizing
Per AutoCad Hydraflow Software
L= 10 ft
D= 2 ft
dwater 0.68 ft
Q25= 20.088 cfs
1.4 Orifice
La= 1.32 Use 7.5 ft
W= 1 Use 3.0 ft
Stone Diameter= Class A
RAFTING AND DESIGN O
SERVICES, INC_
6728 Carbonton Road
Sanford, North Carolina
[phone] phone
27330
[e-mail]
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
NTS
Drawn by:
MTB
Sheet:
Designed by:
MTB
C 12 of 13
Reviewed by:
MTB
Project Number:
DDS JOB #: 2021-10
Date:
MAR 2021
u

Temporary Diversion/Berm #
3 DA # 3
Temporary Diversion/Berm #
5 DA # 5
Calculate Flow - Rational Method
Calculate Flow - Rational Method
25-Yr Sto rm
25 -vr Sto rm
Qm = CIA
C= 0.30
Q25 = CIA
C= 0.30
k 10.80 in/hr
k 10.80 in/hr
Qa = 17.82
A= 5.50 ac
Q , = 3.89
A= 1.20 ac
Channel Slope= 0.50
Channel Slope= 0.50
Channel Depth= 1.50
Channel Depth= 1.50
Bottom width= 3.00
Bottom width= 0.00
Side Slopes= 3.00
Side Slopes= 3.00
Velocity= 3.36
Velocity= 2.30
Soil Type@ sandy loam
Slopes= 0-10%
Soil Type@ sandyloam
Slopes= 0-10%
Channel Lining
Channel Lining
Shear Calculation
Shear Calculation
T=yds
y= 62.4 Ibs
T=yds
y= 62.4 Ibs
dwater 0.92 ft
dwater 0:73 ft
T= 0.28704
Ibs/ft2 s= 0.005 ft/ft
T= 0.22776
lb,/ft' s= 0.005 ft/ft
Temporary-
Straww/netting
Temporary-
Straww/netting
Permanent-
Bermudagrass
Permanent-
Bermudagrass
Temporary Diversion/Berm #
4 DA # 4
Temporary Diversion/Berm #
6 DA # 6
Calculate Flow -Rational Method
Calculate Flow - Rational Method
25-Yr Sto rm
25 -vr Sto rm
Q25=CIA
C= 0.30
Qz,=CIA
C= 0.30
1- 10.80 in/hr
1- 10.80 in/hr
Qa = 12.64
A- 3.90 ac
Q , = 11.66
A- 3.60 ac
Channel Slope= 0.50
Channel Slope= 0.30
Channel Depth= 1.50
Channel Depth= 1.50
Bottom width= 2.00
Bottom width= 3.00
Side Slopes= 3.00
Side Slopes= 3.00
Veloci = 3.14
Veloci = 2.50
Soil Type@ sandy loam
Slopes= 0-10%
Soil Type sandyloam
Slopes= 0-10%
Channel Lining
Channel Lining
Shear Calculation
Shear Calculation
T=yds
y= 62.4 Ibs
T=yds
y= 62.4 Ibs
cl-te 0.87 ft
cl_te 0.84 ft
T= 0.27144
Ibs/ft' s= 0.005 ft/ft
T= 0.157248
Ibs/ft' s= 0.003 ft/ft
Temporary=
Straww/netting
Temporary=
Straww/netting
Permanent=
Bermudagrass
Permanent=
Bermudagrass
Temporary Diversion/Berm #
7 DA # 7
Calculate Flow - Rational Method
25-vrstorm
Qm = CIA
C= 0.30
k 10.80 in/hr
Q2 =
6.16
A- 1.90 ac
Channel Slope=
0.50
Channel Depth=
1.50
Bottom width=
0.00
Side Slopes=
3.00
Velocity=
2.61
Soil Type @
sandy loam
Slopes= 0-109/.
Channel Lining
Shear Calculation
T-yds
y- 62.4 Ibs
dwater 0.87 ft
T=
0.27144 Ibs/ft2
s= 0.005 ft/ft
Temporary- Straww/netting
Permanent- Bermudagrass
RAFTING AND DESIGN O
SERVICES, INC.
6728 Carbonton Road
Sanford, North Carolina
[phone] phone
27330
[e-mail]
4
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REVISIONS
AGENCY REVIEW ONLY
NOT FOR CONSTRUCTION
Scale:
NTS
Drawn by:
MTB
Sheet:
Designed by:
MTB
C 13 of 13
Reviewed by:
MTB
Project Number:
DDS JOB #: 2021-10
Date:
MAR 2021
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