C301B EC Plan_20200408

STONE OUTLET (TYP.) SKIMMER BASIN #10
LL a
SEE DETAIL 7/C502 BOTTOM ELEVATION: 588.50 L ts
WATER LEVEL ELEVATION: 592.00
TOP DAM ELEVATION: 593.50 erect y partnership.
PERIMETER SECURITY 4' WIDE -- TOP OF DAM WIDTH: 5' CLASS I RIP RAP SKIMMER BASIN #22/ ll. 0�11/
-� -� FENCE TO CLEAR SPAN SPILLWAY WEIR LENGTH: 4' 2'W x 6'L x 2'W S.D.O. #22 SKIMMER BASIN #22 Q \ r" •��, 50' UNDISTURBED t /
JURISDICTIONAL AREA f m "' _.__ BOTTOM ELEVATION: 603.75 _
4,7 - T MIN SURFACE AREA: 1,311 SOFT 21' THICK BUFFER V
7 - MIN VOLUME: 2,857 CUFT I WATER LEVEL ELEVATION: 606.75 ®' �; / f 615 St. George Square
ORIFICE DIA: 1.00" POROUS BAFFLES TOP DAM ELEVATION: 608.25 / _ / Suite 300
' SKIMMER SIZE: 1.50" ,.
TYP) TOP OF DAM WIDTH: 5' ` TEMP. SEDIMENT! \ / NC 27103
�\ FLOATING SKIMMER WEIR LENGTH: 5'
/ / FENCE (TYP.) / WIr1StOr1 Salem,
S DEVICE -' `' MIN SURFACE AREA: 1,568 SOFT f
I � _� I "� � ' � . � d 336-842-4065
_ - �"®`�+.. MIN VOLUME: 3,336 CUFT --
CLASS I RIP RAP /\ ; SEE DETAIL 2/C501 { ! Cf0430
2 W x 6'L x 2'W LIMITS OF r CLASS I RIP RAP \ / f
ORIFICE DIA: 1.00" ` c r
21" THICK / DISTURBANCE w\ s 4
D 2'W x 6'L x 2'W SKIMMER SIZE: 1.50" STONE OUTLET (TYPJ(" I labella C.Com
^ t N A T ' \,�/�/�I 21" THICK \ v--� -- f p
POROUS BAFFLES P ' ` L� (- ^ �_ - - ' SEE DETAIL
I L_ ( _ ®._ .-- - QL 5' WIDE SPILLWAY \ LIMITS OF
(TYP) DITCH 6 - SEE VVV
� I ' # E �� T - �/ Ti LIMITS OF + ___ DISTURBANCE
\ DETAILS FOR n \ I _„_.
SKIMMER BASIN #10 STABILIZATION P H•p, FLOATING SKIMMER 1 DISTURBANCE LIMITS OF 1. J I tttttli
- i.. 1 9 DEVICE _ DISTURBANCE i( �.
I STONE OUTLET TYP. ( R I -- .._
( ) r V FES 10 LLJ
\ t \ \ . O.oFE p'
SEE DETAIL 7/C502 ( �'�.. .610 I ( \: / 4- y`
\\ INV.=608.00 _ ( _ 1
11,11'� OF 15"
TEMP. SEDIMENT 65.00 LF
22052
- -FENCE (TYP.) �• '
V 10 -'CLASS I RIPRAP U - i
STONE INLET F v � A •. GINE .•'
SEE DETAIL 2 C501 600 --....�►'a^� �/ . A _ yii� q� '.•......•
FROM SKIMMER BASIN # 8 TO STREAM BUFFER PROTECTION 3.75'Wx9'Lx12.75'W 27"
NTS 604.15 THICK WITH NCDOT TYPE _ f- / r ��� ! ii4 A.STIMQ
- 2 FABRIC UNDERNEATH TEMPORARY DIVERSION U SPILLWAY( y { " /Attu 11Nt�
602.00
_
V I 13' WIDE W \ ' - r \ V
EXCELSIOR MATTING OR I ` I SPILLWAY `_-_ „ -_ SEE DETAIL)3/C502 {! Q ' t / J/ \
APPROVED EQUIVALENT FLOATING _ ' i STONE OUTLET (TYPJ / \
\ s0s,00SKIMMER _ r SKIMMER BASIN #8 { I SEE DETAIL 7/C502
{` I�
` ' \ 6060 DEVICE WATER LEVEL ELEVATION:
0 C / BOTTOM ELEVATION: 609.50 (J ./. ` ` " I T
soa.00 613.00
DETAILS OR
DITCH #5 - SEE r TOP DAM ELEVATION: 614.50 /" 6O
z
F
l \ POROUS BAFFLES FES 9 TOP OF DAM WIDTH: 5' ( _ TEMP. SEDIMENTS y ,'
o STABILIZATION
5' WIDE (TYP) INV.=611.00 WEIR LENGTH: 13' FENCE (TYP)
SPILLWAY o END OF PAVEMENT - _ MIN SURFACE AREA: 4,500 SQFT / u> / "
- ` m MIN VOLUME: 12,426 CUFT - I SEE DETAIL 2 C501
s04.15 / / 0' UNDISTURBED E mm_ , ., �• �,.
SKIMMER�BASIN #5#5 ,o SKIMMER BASIN #6/ DITCH #9 - SEE ORIFICE DIA: 1.75" ��BUFFER \\
BOTTOM ELEVATION: 604.00 POROUS BAFFLES °' S.D.O. #6 DETAILS FOR SKIMMER BASIN #8/ SKIMMER SIZE: 2.00" } -,I-- ---
WATERLEVEL ELEVATION: 607.50 F9 (TYP) 600.77 I STABILIZATION S.D.O. #8 V ` � " sp ( SKIMMER BASIN #13/
;r °` FLOATING ��� 6
TOP DAM ELEVATION: 609.00 CLASS I RIP RAP l SKIMMER / ACCESS ROAD (EAST SIDE) f} 1 -•� - _ --- �� S.D.O. #13
TOP OF DAM WIDTH: 5' \ 2'W x 6'L x 2'W DEVICE SKIMMER BASIN #6 g FROM SK 7 NTS STA. 20+00 k j! �� f 1 /2,
WEIR LENGTH: 6' 21' THICK \ BOTTOM ELEVATION: 597.00 O 15" TEMP. SLOPE _
MIN SURFACE AREA: 1,872 SQFT r � ( STONE \ (j WATER LEVEL ELEVATION: 600.00 y; DRAIN
MIN VOLUME: 4,380 CUFT \ ¢r J
ORIFICE DIA: 1.25" CLASS I RIP RAP OUT (TYP.) A. 2 +00 ATOP DAM ELEVATION: 601.50
' 8' WIDTH OF CURLER I
SKIMMER SIZE: 1.50" 2'W x 6'L x 2'W SEE DETAIL o / TOP OF DAM WIDTH: 5' l EXCELSIOR MATTING OR \ I ©2019 L'aBella Associates
21" THICK 7/( WEIR LENGTH: 5'
\ t ) _ \� APPROVED EQUIVALENT
�a / RETAINING WALL MIN SURFACE AREA: 1,485 SQF7
6 WIDE I: TEMP. CULVERT s MIN VOLUME: 3,123 CUF STONE
7 ``� / ,�w �v, PROTECTIONITYP
\ ORIFICE DIA: 1.00"
SPILLWAY ' EQUIPMENT z z
e
\� CROSSING / SKIMMER SIZE: 1.50"
FLOATING O I l ' \_ STONE ( )
SKIMMER STONE / / I LIMDISTURBANCE
A i ; \ SEEDEA E7/C502 ` c
OUTLET ! oi' / ( ��• z DISTURBANCE `
DEVICE \ ( ( DITCH #10 - SEE r ` __.. \ ` - ALAMANCE
POROUS BAFFLES-` \ DETAILS FOR \
(TYP) \ \ ( TEMPORARY DIVERSION
\ __ MATCHLINE- SHEET C301 E AGGREGATES, LL
TEMP. CHECK DAM STABILIZATION
\ O - (TYPJ \ ` -DITCH (TYP.)
SKIMMER o 5)v� F + �., '. - `
I SEE DETAIL 3/C502 '� �V!... - _
BASIN #5/ \ I SEE DETAIL 4/C501
S.D.O. #5 \ ` l ACCESS ROAD (WEST SIDE) Mr. Chad Threatt VP
I` \a 24'x10'-4" AREA TEMP. CHECK DAM y f
BRIDGE CULVERT (TYP.) \ \ ® FROM SK 6 NO STA. 20+00 y I
l \ '• a NCDOT STEEL r a SEE DETAIL 4/C501\
BEAM GUARDRAIL POROUS BAFFLES TS 50' U NDI BUFFER \ "
( ` �225 LF (FACE AT E.P.) (TYP) 8' WIDTH OF CURLEX I
/ \ SKIMMER BASIN #7 \ EXCELSIOR MATTING OR
STONE OUTLET 1 J / \ BOA I �- \ APPROVED EQUIVALENT
t �. BOTTOM ELEVATION: 600.50 \ \
\ o \ CLASS I RIP RAP_ FLOATING WATER LEVEL ELEVATION: 604.00
\ 2'W x 6'L x 2'W \ SKIMMER TOP DAM ELEVATION: 605.00
21" THICK
•I DEVICE TOP OF DAM WIDTH: 5' z z
B MIN SURFACE AREA: 1,914 SQFT
� WEIR LENGTH: 6' \ /
6' WIDE SKIMMER BASIN #7/' \
00 ` LIMITS
DISTURBANCE SPILLWAY S.D.O. #7 MIN VOLUME: 4,600 CUFT z -
- -
ORIFICE DIA:
SKIMMER SIZE: 1.50"I 1.25"
SKIMMER BASIN #4
a i
CONTRACTOR TO PROVIDE CURLER I
\ I BOTTOM ELEVATION: 604.50 WATER LEVEL ELEVATION: r! ` EXCELSIOR MATTING ACROSS ENTIRE
I 608.00 ~\ \ \
' t8' WIDE I ! TOP DAM ELEVATION: 609.50 I 50' ` \ LENGTH
STEEPEROF ALL SLOPES 3H:1\' AND
SPILLWAY TOP OF DAM WIDTH: 5' UNDISTURBED
POROUS BAFFLES FLOATING ` WEIR LENGTH: 8' / BUFFER ✓ \ \ ` O \
' SKIMMER MIN SURFACE AREA: 2,652 SQFT
(TYP)
DEVICE MIN VOLUME: 6,767 CUFT r' \
ORIFICE DIA: 1.2
s \ SKIMMER 4BASIN #4/ 5"
Q � SKIMMER SIZE: 2.00"
W O i ---TEMP. SEDIMENT j. � \ � \\ � � a Snow Camp Mine
• ACCESS ROAD (WEST SID FROM STA. 18+50 TO SK 6 ! -FENCE (TYP.)
Z NTS / _. SEE DETAIL 2 C501 MINING LIMITS S Q Q
8' WIDTH OF CURLEX III
LW EXCELSIOR MATTING OR
APPROVED EQUIVALENT
f Q BRIDGE CULVERT NEAR STA. 16+50 (NTS) `�.,, '`� \ �"' �\ �'" � • -
U) TW TW {,
I TW TEMPORARY DIVERSION
/ / 1 3 s t n 1- _ A DITCH (TYP.)
SKIMMER BASIN #27/ ���� SEE DETAIL 3/0502' f' / Q S.D.O. #27 BW (TOP OF \ �\
z' Q � v DRAINAGE �, 2 3131J20 NCDEMLR COMMENTS
Q l ' 30 30 60 90 120
�/ STRUCTURE ) I 1 1/20/2' ADDITIONAL STREAM INFO-ALAM.AGG.
TEMP.
SCALE 1'=20' , &LAND QUALITY COMMENTS
I / 40.50 LF STRUCTURAL PLATE /` TEMP. TEMPORARY CULVERT / r \ \ N0: DATE: DESCRIPTION:
{ SILT ` ARCH METAL BRIDGE
SPAN x \ \ �'.
FENCE STONE / EQUIPMENT CROSSING
10'-4" RISE BRIDGE CULVERT 7 x REVISIONS
(TYP) OUTLET ✓ BY CONTECH CONSTRUCTION BW'598.0s TOP CONCRETE
{ (TYP) PRODUCTS PouNDnnoN R. ACCORD-,,WIOTH�'IN 2190335
TYP r ¢ ° PROJECT NUMBER:
SRiEAM V.
590.17 / BW LOWER STREAM Fr�.I
sszts rn 600.01 BW = 591.00 INVERT BW = 591.00 � CONSTRU6TION ACCESS ROAD .`t ' SECTION 10050E '" I
Bw (TOP TEMP. STONE SPECIFICATION RD DRAWN BY: KCG/ATC/BWS
OF STRUCTURE) / BW 593.18 OUTLET (TYP) Bw sss.3s.' REVIEWED BY.
�� 601.33 BW BW 593.81 BW / <
BW 591.00 595.95 rn oil CROSS PI,PE(S}:SIZE'
ew1so6.5o 1 Soo"57 591.00" TW
BW 583.11 / �.' 6/a•ai 24'-0"ARCH SPAN DETERMINED BY CONTRACTOR / W C�� PAS
BW 604.36 rn TW 604.68 / : ' � a+x'° / z I
I 605.04 soa.7s `` _ ISSUED FOR.
TW 607.50 ..
Tw so az a,�sos.os CONSTRUCTION SEQUENCE FOR ARCH SPAN CULVERT AND ���-+'• � r / J U CONSTRUCTION
LEGEND PROPOSED RETAINING WALLS -'s µ '
rn sos.n Ty STREAM CHANNEL
r
805.86 EOP.46 804.88 E05 EOP 4 � .38 ( 1. PLACE SEDIMENT FENCE ALONG THE TOP OF STREAM o. r {- DATE:
v, EOP 805.48 EOP so5.11 soma sos.3s ( / � EXISTING PROPERTY LINE - - �.� "� � �" � . '. U f
3 f 607.20 sOs.1s EOP / NCDOT STEEL BEAM GUARDRAIL BANKS. CLA5585TONE . CLASSBS70NE•, ' L.- L1J 4/8/20
( 6os.to / 225 LF (FACE AT E.P.) PROPOSED PROPERTY LINE A LLB
KEYSTONE RETAINING WALL TO ( II 2. CONSTRUCT THE TEMPORARY CULVERT EQUIPMENT I Q
605.61 o TEMP. SILT = DRAWING NAME:
BE STANDARD III UNITS NC DOT STEEL BEAM f-� CROSSING.
W18"021"x48" - 95LBS I 16+81.60 n ( ) EXISTING BUILDING L_J f
( ) GUARDRAIL AT E.O.P. FENCE TYP
NEAR VERTICAL SETBACK TO, TEMP. SILT I LOW POINT 3. ALSO, PLACE SEDIMENT FENCE AT THE LIMITS OF f
a BE UTILIZED FENCE (TYP)
605.41 I / PROPOSED BUILDING EJ DISTURBANCE DOWN-SLOPE OF THE LOCATION OF THE /
E / /r EOP 1 EDP EOP 60538 PLANVIEW 11� 1
1 f I s06.28 605.48 r 605.10 EOP sosn4 o Tw soass� MINE PERIMETER PROPOSED WALLS. ®�o
o TW 605.86 ( rn sos.z7 / sos.tt \ rn PROPOSED SECURITY FENCE -x-x-x-x- 4• CONSTRUCT THE LEVEL CONCRETE FOUNDATIONS FOR THE j
7YV 606.67 / 4.72 5.07 PROPOSED ARCH SPAN CULVERT. " l SEDIMENTATION &
so4.7 / #5 OR#57 STONE,,
o TW rn TW BW rn \ TEMPORARY DIVERSION DITCH TD � 5. ASSEMBLE THE ALUMINUM STRUCTURAL PLATE ARCH NATURAL 12'MIN; 6"OE NATURAL f
BW 596.87 s0zso ".GROUND , • :' - GROI)ND�
804.88 604.76 604.68 rn pTH(MIN)
so5.oa. 5s2.9s ( CULVERT AND CONNECT THE STRUCTURE TO THE EROSION CONTROL
>_ rn !07. I I , BW ss 1s ( TEMPORARY SILT FENCE ADJACENT CONCRETE FOUNDATIONS. T0;1' 1
m` v / W 600.35 BW (TOP 591.00 ra e�a`ie a�sa 0`1 �, p
- BW 604.83 BW 603.35 591.00' STRUCTURE)( ® BY 598P9 TW PROPOSED ENERGY DISSIPATOR ® ;A 09° I FLAN
'_ rn 607.33 \ 601.33 Bw 596.37 602.00 6. BUILD THE PROPOSED SEGMENTAL BLOCK RETAINING ,
a i �� 594.64 TEMPORARY CHECK DAM v WALLS ON THE WESTERN AND EASTERN ENDS OF THE CLASSBSTONE
ew so6 STREAM €Nv. I ARCH CULVERT. PLACE GEO-GRID FABRIC AND CLEAN \ CRms,PIPE(S)" . r
" 592.00 TEMP. STONE WASHED STONE AS THE WALLS PROGRESS VERTICALLY. FILTRATION ,
MINE HAUL ROAD r OUTLET (TYP) VAR.
� � I `rl F � Bw soo.o GEOTEXTILE f
E I WASHED STONE TO BE USED NCDOT STEEL ` DISTURBED AREA I 7. MAINTAIN THE SEDIMENT FENCE & STONE OUTLETS _ DRAWING NUMBER:
o FOR THE RETAINING WALL AND BEAM GUARDRAIL I / NOTE: J THROUGHOUT THE CULVERT AND WALL CONSTRUCTION ','
'./ ROADWAY BACKFILL FOR THE / CONTRACTOR TO INSPECT THE SEDIMENT FENCE o PROCESS. '
0 3 RETAINING WALL SHOP DRAWING COMPLETED BY A NORTH & STONE OUTLETS IN THE ROAD CROSSING STONE OUTLET .` •, " (
/ ENTIRE LENGTH OF THE WALLS CROSS SECTION-,PLAN VIEW REFERENCEA(NOTTOSCALE) ,o CAROLINA PROFESSIONAL ENGINEER TO BE SUBMITTED FOR REVIEW AREA DAILY. MAINTENANCE MUST BE I
8.
AND APPROVAL PERFORMED FOR THESE MEASURES AS NOTED TEMP. SLOPE DRAIN PLACE THE SEDIMENT FENCE AT THE TOP OF THE
r
RETAIN
NG
LLS
NE
ETS AT THE LOW
d " / ON SHEETS C501 & C502 POINT ILOCATAONS WnTHET�ERTICALLCURVE TO ALLOW /
rn STONE INLET PROTECTION i-'
E CLEAN RUNOFF TO DISCHARGE.
S.D.O. STORM DRAINAGE OUTLET TEMPORARY CULVERT EQUIPMENT CROSSING
z , Arm
9. SEED AND MULCH ALL DENUDED AREAS ADJACENT TO THE Nis
C3016
o n RETAINING WALLS.