C301B EC Plan

STONE OUTLET (TYP.) SKIMMER BASIN #10
SEE DETAIL 7/C502 BOTTOM ELEVATION: 588.50
WATER LEVEL ELEVATION: 592.00
TOP DAM ELEVATION: 593.50
PERIMETER SECURITY 4WIDE -- TOP OF DAM WIDTH: 5' CLASS I RIP RAP SKIMMER BASIN 22
-� -� FENCE TO CLEAR SPAN SPILLWAY WEIR LENGTH: 4' 2'W x 6'L x 2'W S.D.O. #22 # / SKIMMER BASIN #22 C /, 50' UNDISTURBED I / r "
E
JURISDICTIONAL AREA MIN SURFACE AREA: 1,311 SQFT - - 21" THICK BOTTOM ELEVATION: 603.75
3 7L �' t BUFFER
' +. � WATER LEVEL ELEVATION: 606.75
MIN VOLUME: 2,857 CUFT ^y+. ®' ' t /
ORIFICE DIA: 1.00" ,- `--_ ,� POROUS BAFFLES TOP DAM ELEVATION: 608.25 _ _ l � � I �y�
(TYP) TOP OF DAM WIDTH: 5' / ` TEMP. SEDIMENT!
SKIMMER SIZE: 1.50" I
I¢ FLOATING SKIMMER - _ WEIR LENGTH: 1 l FENCE (TYP.) /
DEVICE h R MIN SURFACE AREA: 1,568 SQFT t _`' , ! " /
+.. MIN VOLUME: 3,336 CUFT a _ i
CLASS I RIP RAP -"" -"� "" \ :� � am SEE DETAIL 2 C501�
2'W x 6'L x 2'W �� LIMITS OF U r -
CLASS I RIP RAP A \ ORIFICE DIA: 1.00" m
21" THICK / DISTURBANCE
" I f ' { 2'W x 6'L x 2'W SKIMMER SIZE: 1.50 r 9 f
t N A T f A \ .v""..\ `�..I �' I . ' __ y STONE OUTLET (TYP )J"
POROUS BAFFLES / /� 21" THICK j`jj I / SEE DETAIL 7/C502j ,
, E I _ ®. _ ._ Q) 5' WIDE SPILLWAY -- I \
TYP �J _
( ) DITCH TA - SEE T/q �' -,- " "i LIMITS OF I'�.
\ ,€� t � DETAILS FOR � _
Qom' FLOATING SKIMMER - DISTURBANCE I J ti,
SKIMMER BASIN #10 STABILIZATION H.P. c - LIMITS
1 '�� DEVICE 1.' DISTURBANCE
-- n
\ STONE OUTLET (TYP.) ( FES 10 W
SEE DETAIL 7/C502 ( �'►�� �`� - 610� �� / \: o
1
`� 1 65.00 LF INi.,608.DD Q \ 'j,/
TEMP. SEDIMENT OF 15 RCP �uK j
FENCE (TYP.) l \ �.i / 1 •i
SEE DETAIL 2 C501 600 10 _ _ - -' CLASS I RIPRAP
t�� -I �J
STONE INLET \
FROM SKIMMER BASIN # 8 TO STREAM BUFFER PROTECTION 3.75'Wx9'Lx12.75W 27" _ 0
�- �' .T 1
soa.t5 THICK WITH NCDOT TYPE
NTS
J - 2 FABRIC UNDERNEATH TEMPORARY DIVERSION
6 so2.Do 13' WIDE 61
8' WIDTH OF CURLEX III - __„_ .- DITCH (TYP.)
EXCELSIOR MATTING OR ` ` l SPILLWAY SEE DETAIL Q j/
APPROVED EQUIVALENT I 7D T _ ' ! _J / �✓ `' i' ' . N
FLOATING (� STONE OUTLET (TYP.)' �' \ 1 I
\ FFE s0s,00 DEVICEER _ r SKIMMER BASIN #8 { I SEE DETAIL 7/C5021 >- ` \� i
\, BOTTOM ELEVATION: 609.50 { I
so4.00 60 WATER LEVEL ELEVATION: 613.00
z X DITCH #5 -SEE - r TOP DAM ELEVATION: 614.50
z m DETAILS FOR
l \ POROUS BAFFLES FES 9 TOP OF DAM WIDTH: 5' ( _ TEMP. SEDIMENTS y , - r
o STABILIZATION - O
5' WIDE (TYP) INV.=611.00 WEIR LENGTH: 13' FENCE (TYP)
MIN SURFACE AREA: 4,500 SQFT / u' SEE DETAIL 2 C501 i
_ SPILLWAY I o END OF PAVEMENT /
- ` 0 -- MIN VOLUME: 12,426 CUFT \ - . - -.- -,,, •- ..
SKIMMER BASIN #5#5 \ F ` so4.t5 / j 0 UNDISTURBED F _
\ o \ SKIMMER BASIN #6/ DITCH #9 -SEE ORIFICE DIA: 1.75" �IBUFFER
BOITOM ELEVATION: 604.00 POROUS BAFFLES °' S.D.O. #6 I DETAILS FOR SKIMMER BASIN #8/ SKIMMER SIZE: 2.00" 1 - \
WATER LEVEL ELEVATION: 607.50 F9 (TYP) soon v { / STABILIZATION S.D.O. #8 \ ` \ sp ( SKIMMER BASIN #13/
;r °` FLOATING ���\ 6
TOP DAM ELEVATION: 609.00 ` CLASS I RIP RAP SKIMMER / /F _-- 1 / S.D.O. #13 J/
ACCESS ROAD (EAST SIDE) _-1�
TOP OF DAM WIDTH: 5' 2'W x 6'L x 2'W ` DEVICE -"`� FROM SK 7 TO STA.20+00 ;�.--
WEIR LENGTH: 6' ` - 21" THICK \ u, SKIMMER BASIN #6 } _ _
MIN SURFACE AREA: 1,872 SQFT ` r STONE \ ` ` �f BOTTOM
ER LEVEVATION: ION: 597.00 O NTS { �� - \ 15 TEMP.
SLOPE `I �
MIN VOLUME: 4,380 CUFT CLASS I RIP RAP OUTLET TYP. 7 \ _- - -
ORIFICE DIA: 1.25" (TYP-) A. 2 +00 TOP DAM ELEVATION: 601.50 1 8' WIDTH OF CURLEX I ` N S� } �
2'W x 6'L x 2'W SEE DETAIL o TOP OF DAM WIDTH: 5'
SKIMMER SIZE: 1.50" EXCELSIOR MATTING OR
21" THICK 7/C502 ' // WEIR LENGTH: 5'
s r; ,. APPROVED EQUIVALENT � -� rn t� 1? � ✓ , -
\ \ ', t MIN SURFACE AREA: 1,485 SOFT a �) RETAINING WALL
•`
\ s MIN VOLUME: 3,123 CUF7
1 6 WIDE \ I TEMP. CULVERT ' / \ = PROTECTION (TYP) �_
SPILLWAY \ EQUIPMENT It ORIFICE DIA: 1.00" z z 1 _, a
\\ \\ CROSSING { / SKIMMER SIZE: 1.50" _.. y
FLOATING o (TYP.)
SKIMMER STONE / / LIMITS OF i ; SSEE EDETAIL E7/ 502 ` \ c
( DEVICE \ OUTLET V o� • z DISTURBANCE ._ -„� _ __
E DITCH #10 - SEE j V - _ V A -
MATCHLINE-SHEET C301 E
POROUS BAFFLES-` "- , � DETAILS FOR \
(TYP) \ \ ( TEMPORARY DIVERSION
SKIMMER p TEMP. CHECK DAM STABILIZATION ( )
`\ -`'� DITCH TYP. "
BASIN #5/ \ ` ` \ { ( SEE DETAIL 4/C501 \ \ SEE DETAIL 3/C502
S.D.O. #5 TEMP. ICHECK DAM ACCESS ROAD (WEST SIDE)
BRIDGE
AREA TTMP FROM SK 6 TO STA. 20+00 y \
{" \ BRIDGE CULVERT (TYP.) 8 NTS
l \ '• a DOT STEEL a SEE DETAIL 4/C501 \ O \ ~ \
BEAM GUARDRAIL POROUS BAFFLES \ \ 50' UNDISTURBEDBUFER \
/225 LF (FACE AT E.P.) (TYP) 8' WIDTH OF CURLEX I ~ \
I
l , J✓ l \ �oA\ SKIMMER BASIN #7 EXCELSIOR
STON\ APPROVED EQUIVALENT
~ \ \ \ \ \
E OUTLET ` ,, �.
o CLASS I RIP RAP _ \ BOTTOM ELEVATION: 600.50 FLOATING \
\ \ 2'W x 6'L x 2'W WATER LEVEL ELEVATION: 604.00
SKIMMER TOP DAM ELEVATION: 605.00 1 z
O \ 21" THICK z a 6 l I DEVICE TOP OF DAM WIDTH: 5'
WEIR LENGTH: 6'
LIMITS %', \ \ \ \ \
6' WIDE SKIMMER BASIN #7/' MIN SURFACE AREA: 1,914 SQFT \
op ` D STURBANCE SPILLWAY S.D.O. ## ` MIN VOLUME: 4,600 CUFT z
I' ORIFICE D SKIMMER BASIN #4 I SKIMMER SIZE: 1.50"
$ { CONTRACTOR TO PROVIDE CURLEX I \ 20
BOTTOM ELEVATION: 604.50 ` \ ~ ` EXCELSIOR MATTING ACROSS ENTIRE
\ I WATER LEVEL ELEVATION: 608.50 ~\ l \
�8' WIDE I � { ` \ \ LENGTH OF ALL SLOPES 3H:1\' AND ` \
TOP DAM ELEVATION: 609.50 UN \ STEEPER ( 1 \ \ ~
SPILLWAY TOP OF DAM WIDTH: 5' � UNDISTURBED � \
POROUS BAFFLES FLOATING ` WEIR LENGTH: 8' / BUFFER % \
SKIMMER MIN SURFACE AREA: 2,652 SQFT I
(TYP)' DEVICE \ MIN VOLUME: 6,767 CUFT
SKIMMER BASIN #4/ j ORIFICE DIA: 1.25"
Q S.D.O. #4 SKIMMER SIZE: 2.00" _.•�/ /� _ �- % / ��
W O --._-TEMP. SEDIMENT
`1 \ ACCESS ROAD (WEST SID FROM STA. 18+50 TO SK -- FENCE (TYP.) \ \ Q
Z NTS/ SEE DETAIL 2 C501 MINING LIMITS 1 Q Q
8' WIDTH OF CURLEX III ` `al 41 QO
LW ( EXCELSIOR MATTING OR
Q
APPROVED EQUIVALENT it V"O \ \ ~
BRIDGE CULVERT NEAR STA. 16+50 (NTS)
I TW TEMPORARY DIVERSION
TW
s DITCH (TYP.)
/ SKIMMER BASIN #27/ 1 SEE DETAIL 3/0502 f
a Q Q S.D.O. #27 BW (TOP OF
`
/ iz' ' Q Q v DRAINAGE ` STRUCTURE \ \ 30 30 60 90 �120 f U ) '\
TEMP. SCALE: 1'=20' 40.50 LF STRUCTURAL PLATE
SILT TEMP. TEMPORARY CULVERT
` ARCH METAL 24' SPAN x
FENCE STONE / EQUIPMENT CROSSING
(TYP)
10 -4 RISE
✓ BY CONTECH
BRIDGE CULVERT
CONSTRUCTION
/
Bw 598.09
x
TOP CONCRETE
(TYP)
(TYP)"'
(PRODUCTS
FOUNDATION
` I
STREAM INV. /
590•97 !/
�
TW 600.01
=
BW 591.00
LOWER STREAM
INVERT
=
BW 591.00
BW
597.15
Bw (TOP
TEMP. STONE
�
OF STRUCTURE) / BW 593.18
OUTLET (TYP)
BW 595.35.
°
21' 10"•
1.601.33 BW
BW 593.81
SIN
BW(606.50
BW 591.00
591.00'
Bw 593.11
TW
604.47
24'-0"ARCH SPAN
BW 600 .57
BW 60CH
TW 604.68
{/
/
/'
/
I
,
605.04 604.76
605.06
TW 607.50
CONSTRUCTION SEQUENCE FOR ARCH SPAN
CULVERT AND
Tw so .7z
4.85
LEGEND
PROPOSED RETAINING WALLS
TIN 606.77
805.86
"
EOP 804.88
IEOP
EOP
EOP
v,
1
EOP
607.20
605.46
`EOP
605.ti
so5.1
/
605.38
/
EXISTING PROPERTY LINE
_ -
1.
PLACE SEDIMENT FENCE ALONG THE TOP OF STREAM
BANKS.
605.16
sos.to
!
NCDOT STEEL BEAM GUARDRAIL
d
!
KEYSTONE RETAINING WALL TO
r
(
225 LF (FACE AT E.P.)
PROPOSED PROPERTY LINE
2.
CONSTRUCT THE TEMPORARY CULVERT EQUIPMENT
BE STANDARD III UNITS
I
NCDOT STEEL
1
BEAM
so5.st
o
TEMP. SILT
FENCE (TYP)
)
EXISTING BUILDING
f - I
L_J
CROSSING.
(W18"xD21"x48" - 95LBS)
GUARDRAIL AT
E.O.P.
16+81.60
n
NEAR VERTICAL SETBACK TO'
TEMP. SILT
I
LOW POINT
605.41
I
/
PROPOSED BUILDING
3.
ALSO, PLACE SEDIMENT FENCE AT THE LIMITS OF
a
BE UTILIZED
FENCE (TYP)
EOP
DISTURBANCE DOWN -SLOPE OF THE LOCATION OF THE
/
Isos.zs
�05.46
t
EDP
605.18
EOP
605.t sos.3�
TW soa.9s
MINE PERIMETER
PROPOSED WALLS.
o
/
TW 605.86
l
605.11
\
/
I
( Tw sos.z7
Tw
PROPOSED SECURITY FENCE
-x-x-x-x-
4.
CONSTRUCT THE LEVEL CONCRETE FOUNDATIONS FOR THE
TW 606.67
4.72
5.07
PROPOSED ARCH SPAN CULVERT.
o
TW
TW
804.7
TW
ny
\
TEMPORARY DIVERSION DITCH
TD�
5
ASSEMBLE THE ALUMINUM STRUCTURAL PLATE ARCH
a 605.04, 604.88 604.76 BW 604.68 TW
BW 596.87 502.98 CULVERT AND CONNECT THE STRUCTURE TO THE
A > TW 607. I I , BW 59 t9 802.80 TEMPORARY SILT FENCE ADJACENT CONCRETE FOUNDATIONS.
m W 600.55 BW BW (TOP 1591.00 BW
BW 604.83 BW 603.35 Ilw 597.00' STRUCTURE) •� 59 59B 2y TW PROPOSED ENERGY DISSIPATOR
TW 6m.33 STRUC BW 598.37 soz.00 ® 6. BUILD THE PROPOSED SEGMENTAL BLOCK RETAINING
o 594.s4 WALLS ON THE WESTERN AND EASTERN ENDS OF THE
\� TEMPORARY CHECK DAM v
� � BW sos I• STREAM IM'• TEMP. STONE I j ARCH CULVERT. PLACE GEO-GRID FABRIC AND CLEAN
% 592.001 OUTLET (TYP) I ! / MINE HAUL ROAD WASHED STONE AS THE WALLS PROGRESS VERTICALLY.
E I WASHED STONE TO BE USED NCDOT ST```EEL ` / aw 100.0 DISTURBED AREA I 7. MAINTAIN THE SEDIMENT FENCE &STONE OUTLETS
o FOR THE RETAINING WALL AND BEAM GUARDRAIL I / NOTE: F J THROUGHOUT THE CULVERT AND WALL CONSTRUCTION
ROADWAY BACKFILL FOR THE / CONTRACTOR TO INSPECT THE SEDIMENT FENCE STONE OUTLET PROCESS.
o / ENTIRE LENGTH OF THE WALLS RETAINING WALL SHOP DRAWING COMPLETED BY A NORTH & STONE OUTLETS IN THE ROAD CROSSING
o CAROLINA PROFESSIONAL ENGINEER TO BE SUBMITTED FOR REVIEW AREA DAILY. MAINTENANCE MUST BE I
8. PLACE THE SEDIMENT FENCE AT THE TOP OF THE
AND APPROVAL PERFORMED FOR THESE MEASURES AS NOTED TEMP. SLOPE DRAIN
WLLS/ AT THE LOW
ON SHEETS C501 & C502
STONE INLET PROTECTION POINT RETAINING
AONS WnTHET�ERTICALLCURVE TO AL ETS OW
rn
E CLEAN RUNOFF TO DISCHARGE.
r S.D.O. STORM DRAINAGE OUTLET 9• SEED AND MULCH ALL DENUDED AREAS ADJACENT TO THE
o a RETAINING WALLS.
PLAN VIEW
TEMPORARY CULVERT EQUIPMENT CROSSING
NTS
�D
x
l
Y
*
r
"3
L LL a
iatsu
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© 2019 L9Bella Associates
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a1 Threatt,
■
Snow Camp Mine
2
3/31/20 NCDEMLR COMMENTS
1
1/20/20
ADDITIONAL STREAM INFO - ALAM. AGG.
& LAND QUALITY COMMENTS
NO.
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC/BWS
REVIEWED BY: PAS
ISSUED FOR:
CONSTRUCTION
DATE:
4/8/20
I]:1:1h91Ne11►:1�19
111=60'
EROSION
'' CONTROL
■
LAV
DRAWING NUMBER