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LaBeLLa
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January 24, 2020
Re: Proposed Alamance Quarry and Contruction Materials Quarry -
Comment Responses to the NC DEQ letter dated 1/9/2020
1. Provide proof that your company has obtained buffer authorization from the Division of Water
Resources for impacts to the buffer from the access road and fencing
Paul Stimpson coordinated with Sue Homewood, DWR on 1/22/20; the perimeter security
fencing will be exempt because trees will not be cut in the areas of the stream buffer. The
perimeter security fencing will be meandered as needed. A note has been added on sheet C301E
that no trees will be cut where the perimeter security fencing is within a stream buffer area
2 . Provide details on the installation of the arch culvert installation and the work across the stream
to prevent sedimentation during installation and construction.
Paul Stimpson coordinated with Tamara Eplin on 1/21/20. The construction sequence for the
Arch span culvert has been updated, on sheet C301B, to include the temporary culvert
equipment crossing on the west side of the proposed arch culvert. Also, a detail for the
temporary culvert equipment crossing has been added to sheet C301B
3. Show the sediment baffle placement on the plans indicative of field conditions. Proper baffle
placement in the basins affects the desired volume between baffles and allows access for
maintenance
Paul Stimpson coordinated with Tamara Eplin on 1/21/20. The skimmer basin detail has been
modified on sheet C502 to adjust the baffle spacing for 25% increments. The baffle placement
for each skimmer basin has been modified on plan sheet C302. Also, construction specifications
and maintenance information for the porous baffles has been added to sheet C502
The following sheets were revised to incorporate orate comments from the 1 9 20 letter: C201 C202
C203,001,00113,001E,002,003 and C502.
Respectfully submitted,
LABELLA ASSOCIATES, P.C,
Paul A. Stimpson, PE
Civil Group Leader
615 St. George Square Court, Suite 300 Winston-SaLem, NC 27103 1 P 336-842-4o65 f 704-332-6177
wnww.LabeLLapc.com

COVER SHEET
C101 EXISTING CONDITIONS
C201 MINE MAP
C202 PLANT AND STOCKPI
LE PLAN
C204 RECLAMATION PLAN
C301 OVERALL SEDIMENTATION 8c EROSION CONTRO
C301A - C301F I"_60' EROSION CONTROL PLANS
C302 SKIMMER BASIN GRADING
C303 ENTRANCE ROAD PLAN AND PROFILE
C304 DRAINAGE AREAS
C305 PARKING AND ENTRANCE ROAD DETAILS
C401
C402
C403
C501
SITE DETAILS
SITE DETAILS
SITE DETAILS
EROSION AND
SEDIMENT CON TRO
C502 EROSION AND SEDIMENT CONTR
DETAILS
DETAILS
342 CLARK
ROAD
SNOW CAMP NC 27349
ALAMANCE COUNTY, NC
ROSELLE RD
WORKMAN RD 0
r.
QUAKENBUSH RD
SITE
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OLD DAM RD
LOCATION MAP
SCALE: NTS
L PLAN
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SITE DEVELOPER/OWNER
ALAMANCE AGGREGATES, LLC
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LaBeL
Powered by pa
615 St. George Square
Suite 300
Winston-Salem, NC 27106
336-842-4065
C#0430
labellape.com
PROJECT NO: 2190335
rtnership.

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_ / Ij ` \ / / / / %/ % �� o�\ ' �1/ / 566— �DF , z5 f / A G _® \ }vYii_- ART 1�1 I f GENERAL NOTES
— —> -- 1. EXISTING SITE FEATURES, TOPOGRAPHY, AND PROPERTY DATA FROM INFORMATION PROVIDED BY COE FORESTRY AND
fj/ %R/ SURVEYING. ALSO, SITE PLAN INFORMATION OBTAINED FROM DRAWING SEALED BY CHRISTOPHER FAULK, PLS DATED
j N r 1/10/1 B. STREAM SURVEY FROM NEIL PRESLAR DATED 2/19/19.
RY I ( i \ \ \ Z 4� ° } 1 ` (`f II� t / / / , 5 \ 2. OBTAIN ALL APPLICABLE PERMITS AND PLAN APPROVALS PRIOR TO BEGINNING WORK
/f✓ % J� t / �` ��� ( I ( �I f �( \` f \ c \ f 3. CONTRACTOR IS RESPONSIBLE FOR VERIFYING ALL EXISTING FEATURES PRIOR TO START OF CONSTRUCTION. CALL 811.
t i /
`� ANY DISCREPANCY IN LOCATION, SIZE, OR DESCRIPTION OF EXISTING FEATURES SHOWN ON THE PLANS SHALL BE
l u) it /'" ''�``,.�\ \' '"°~,.�..�..^ ._., ""%` _' :.�° 1�T �`'N`�", „a'.`�'.'. II r �,, ` •y, f / -•,,,, \ \ W IMMEDIATELY.
�` f f®�RM�j N� f f / ` t BROUGHT TO THE ATTENTION OF THE ENGINEER
I / ✓ // /' r\f f J /[ 1 f (� ti i = f �A , (_ \ f d !� ( I L I / n. THE CONTRACTOR WILL BE REQUIRED TO DO ALL WOIiIC NECESSARY TO PROVIDE SUITABLE CONNECTIONS WITH ALL
/ l f✓ / / // P r p // / ff f ROADS, STORM DRAINS, AND UTILITIES ENTERING THIS PROJECT.
Plb`/10 7oh ' I ( \ r ` l / / % f r \ \� l l \ ,i/ 5. NU SUBSURFACE INVESTIGATIONS OF DETERMINATION HAS BEEN MADE BY THE ENGINEER. I
�� / f f I 4\( I G NEER. THE CONTRACTOR SHOULD
/ I N a P A�n APp r f
/ AR // ;t> MAKE HIS OWN INVESTIGATION AS TO THE SUBSURFACE CONDITIONS.
} _ ANT TRA�1 `MI`�
_�g1° . ! iGT ION �INE _%"" 0 AND FEATURES ON SITE, RESPONSIBLE FOR LOCATING, RELOCATING, AVOIDING, AND PROTEGI'ING ALL EXISTING UTILITIES
PO ITNlof �\ \ / { — f _, 7, PRIOR 10 FINAL ACCEPTANCE THE CONTRACT013 SHALL ULTIMATELY BE RESPONSIBLE FOR ENSURING THE SATISFACTORY
PID 1o27Ts�s0 �\ / ' l / COMPLETION OF THE TOTAL PROJECT.
\ ` \ \O
l �� PAMELA a CAusEY-RE RC (RUST ` g L BE RESPONSIBLE FOR THE COORDINATION OF THE REMOVAL AND/OR RELOCATION OF ANY EXISTING
/ / \ ` \ CONTRACTORSHAL
` UTILITY POLES, GUY WIRES, AND/OR ANY OTHER EXISTING FEATURES AS REQUIRED.
� �,� _ - _ r„ �% f/ � %/ / ( - _ - !!I (�, ,.��� ._ •� � / ��� r-v � v `� � � � � t ,,,.r ��° t / � 9. CONTRACTOR MUST CONSTRUCT ALL WORK UNDER THE SUPERVISION OF A QUALIFIED GEOTECHNICAL FIRM.
F ( I • , `~ h,-� 1.ocACO / r1 10. ALL WORKMANSHIP AND MATERIALS TO CONFORM WITH NCD01' SP[CIFICATIONS AND DRAWINGS UNLESS OTHERWISE
i r'"ti NOTED.
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CHRIS KINSEY
AMANDA IVEY OOD
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615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
4. STIMp�'��`�
© 2019 LaBelle Associates
ALAMANCE
AGGREGATES, ILL.
Mr. Chad Threatt, VP
N0: WE DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
DATE:
DRAWING NAME:
CONSTRUCTION
7/18/19
me.-µ
1.
w _
125 0 125 250 375 500,
1" = 250'

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PLANT
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C s51 c R A'( PHASE 4 ROCK \
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rimer � PHASE ROCK I �'
t" -4 R 66 / EXCAVATION
/ NDISi0R6E[Y % ORs�INI�1G` y`
LIMITS I
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/%/� PHASE 2 RC
/ C j) EXCAVATION
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WERAND I
5
�`\♦I '♦� \ \ fJ ie ! UNDISN�BED,. �---
NOTES FROM SITE PLAN SEALED♦,,
BY CHRISTOPHER FAULK, PLS ON 1/10/18: � e RE�oa /� (/ WETLAND
WERXpD Q D
- PROPOSED IMPERVIOUS AREA = 5.0
- PONDS TO BE FILLED ONLY WITH NCDEQ APPROVAL
PER 401 / 404 PERMITTING/-
- AREA OF OPERATIONS IS BUFFERED A MINIMUM OF_x�
_ ( =1
125' FROM PROPERTY LINES �♦� �`� _`nU`s
- TEMPORARY LIGHTING WILL BE USED FOR ANY REQUIRED
NIGHT OPERATIONS i V
- FINAL DESIGN AND PLACEMENT OF STORMWATER CONTROL �`° ` f
DEVICES TO BE CONFIRMED BY APPROVED SEDIMENT AND �— f0 -3 - / \
EROSION CONTROL PLAN / NA
- BERMS TO BE CONSTRUCTED 8' +/- HIGH AND PLANTEDyT°16
WITH LOBLOLLY PINE `rs9� z RR By , yNy��
- LOBLOLLY PINES TO BE "DOUBLE -STAGGER" PLANTED PER JAB I �( SCW APR
SCREENING GUIDLINES DESCRIBED IN ALAMANCE COUNTY ` Fj
ORDINANCE t
`♦ �1 j I /� / } 1} �\
- ALL VEGETATIVE SCREENING MUST BE VERIFIED BY VISUAL / ` �0
INSPECTION PRIOR TO ISSUANCE OF AN OPERATIONS PERMIT 1 I v / / t OFFICE
FOR THE FACILITY. PLEASE CALL 336-570-5053 TO t / 4 i }�\ 0 PLE plp=to272e
SCHEDULE AN INSPECTION. \ \ w 11 CG a /JJ v PROPOSED
- INTENT -TO -CONSTRUCT PERMITS ARE VALID FOR (1) YEAR I / r ° ROPOSED ' EPTIC
FROM THE DATE OF ISSUANCE. �\ w a m // / %' -PARKING. _
- TWO (2) COPIES OF A POST DEVELOPMENT/ASBUILT PLAN \ \\
ARE REQUIRED TO BE FILED WITH THE ALAMANCE COUNTY \14 m
PLANNING DEPARTMENT AT THE COMPLLZION OF CONSTRUCTION \ �I'I o / ' (
AND PRIOR TO ISSUANCE OF AN OPERATIONS PERMIT. ` H0 p \ E f`E- ERM (1 A BUFF �
- AN OPERATIONS PERMIT WILL BE REQUIRED PRIOR TO BEGINNING -H \ _/
OPERATION OF THE FACILITY. PLEASE CALL 336-570-4053
FOR ADDITIONAL INFORMATION.
- OPERATIONS PERMITS ARE VALID FOR THREE (3) YEARS.
PLEASE CONTACT THE ALAMANCE COUNTY PLANNING
DEPARTMENT AT 336-570-4053 TO RENEW THIS PERMIT
PRIOR TO EXPIRATION.
- LIGHTING TO BE INSTALLED PER LIGHTING PLAN DETAIL 1 \ - a \
`� ``. \ PID: 1625'9a
SUBMITTED WITH SITE PLAN
- ACCESS WAYS, WALKWAYS AND PARKING AREAS SHALL I Ir �/ �J' } j `
BE LIGHTED ADEQUATELY BY LIGHTING FIXTURES WHICH 1 ID: 'Uo'
„gA 9 OiWtC
SHALL BE SO INSTALLED AS TO PROTECT THE STREET <\� p \ l
\\\ U
AND NEIGHBORING PROPERTIES FROM DIRECT GLARE OR `•,, ���'♦ �; �� �_ , • a k v _•e � \ `\ -• �
HAZARDOUS INTERFERENCE OF ANY KIND. APPLICANTS v /
ARE ENCOURAGED TO USE LIGHT SHIELDING AND FIXTURES \ } I ✓ �i _ g,o, Al b y 9jN 630 y ter^
THAT ARE APPROVED BY THE INTERNATIONAL DARK SKY\��(// -.R, A OE
k�SFC\ Nq SN ASSOCIATION (IDA) AS THESE FIXTURES CONSERVE ENERGY, \ l "r N
REDUCE MONTHLY COSTS, AND MINIMIZE THE IMPACT OF (/
LIGHT POLLUTION ON SURROUNDING PROPERTIES. s V {\ \� ` \ ! k cT E%qO
(HIDO SECTION 4, ITEM 1) \ ��
125' OPERATIONAL SETBACK TO INCLUDE 50' SCREENING \\ k oR
BUFFER REQUIRED BY HIDO SECTION 4 ITEM G. NATURAL ♦` �� �� \ �\ �x s
VEGETATION TO BE SUPPLEMENTED AS DESCRIBED IN HIDO
APPENDIX "A" PER SUBMITTED SCREENING PLAN SUBJECT TO \ k
APPROVAL OF PLANNING DIRECTOR ~~ ~ ~ \ \
3 - STRUCTURES NOT TO EXCEED 40' IN HEIGHT ABOVE NATURAL
y3 ELEVATION GRADE PER HIDO SECTION 4 ITEM B
- BUILDING ON PID #102726 TO BE REMOVED SUBJECT TO
PROPER DEMOLITION PERMITS
E-FINAL APPROVAL AND OPERATION PERMITS WILL BE\\t
a CONTIGENT UPON RECIEPT OF FINAL STATE AND FEDERAL �
1 (< t - APPROVALS I / f / Aa IS aNSEY /
a - HISTORIC PROPERTIES TO REMAIN OR MADE AVAILABLE \ \ / / AMANDA IVEYtlOD
FOR RELOCATION UPON CONSULTATION WITH HISTORICAL
� PROPERTIES COMMISSION
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_71 77' mm� \�-- / I THE INITIAL CRUSHING PLANT WILL BE A MOBILE PLANT THAT
OUNOARY j1 �\' (( t WILL BE ABLE TO MOVE THROUGH THE PHASES OF THE QUARRY.
- pip, 1Q2h 1)""`� I t� PHASES 1 THROUGH 4 OF THE MINE ARE SHOWN. ---.
DURING PLANT t MAYIIINITIALLY BE G THE R INUTHE GENERAL LOCATIONP OF THE QUARRY, S FR PHRASE 2 AS
�— .6♦� ' 1 (�I{) SHOWN IN ORDER TO SERVE THE PHASE 1 EXCAVATION SITE.
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LEGEND
PROPERTY LINE
EXISTING BUILDING
L_J
PROPOSED BUILDING
0
MINE PERIMETER
PROPOSED SECURITY FENCE
—x x x x-
50' UNDISTURBED BUFFER -"-
-""'- -"- -
100' STRUCTURE SETBACK BUFFER -
- - - -
125' OPERATIONS SETBACK BUFFER
PROPOSED SKIMMER BASIN
6t
DISTURBED AREA
F J
I�IImII,Te7�1�11
OVERBURDEN SLOPE 2:1 MINING LIMITS
20' SAFETY BENCH EXISTING GROUND _-
APPROXIMATE WATER LEVEL AFTER RECLAMATION
MAX)
VARIES
270'-332'
— r HAUL ROAD
/ j H 1 V SLOPE
�15' BENCH
M
1 PR FLOOR
(VARIES IN WI[
MINING AREA SECTION "A -A"
SCALE: 1 "=100'
THE INITIAL & ULTIMATE CLEARING LIMITS
ARE THE SAME. THE OVERBURDEN SOIL
WILL BE REMOVED OVER ALL THE PHASES
1 THROUGH 4 AT ONE TIME. THE PHASES
HAVE BEEN SHOWN FOR ROCK EXCAVATION
DELINEATIONS.
UNNAMED TRIBUTARIES TO REEDY BRANCH
AND UNNAMED TRIBUTARIES TO CANE CREEK
FLOW THROUGH THE SITE. REEDY AND CANE
CREEKS ARE IN THE CAPE FEAR RIVER BASIN
ARE CLASSIFIED AS WS V AND NUTRIENT
SENSITIVE WATERS BY NCDWR
8'H x 50'W BERM
SEE BERM DETAIL 2
18'
�BERM� F
BERM SLOPE 2H:1V
8' TALL
50' WIDE
AT BASE
SEE DETAIL 2/403 FOR ADDITIONAL
INFORMATION
BERM 1 DETAIL
NOT TO SCALE
'8' /— BERM SLOPE 2H:1V
ERM
OVERBURDEN I
SLOPE 2H:1V -\ 'TALL
50' WIDE
SEE DETAIL 2/403 FOR ADDITIONAL
INFORMATION
MINE BERM DETAIL
NOT TO SCALE
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
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© 2019 LaBella Associates
ALAMANCE
AGGREGATES,
Mr. Chad Threatt, VP
1
1/20/20
ADDITIONAL STREAM INFO - ALAM. AGE.
& LAND QUALITY COMMENTS
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
11:T-1Td1@[HILITAI
DRAWING NUMBER:

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605
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SKIMMER ®�\
BASIN #5/- �\
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610 55U
640
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600
— - 620
610
590 600
590
580
570
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_{= 630 615 St. George Square
Suite300
Winston-Salem, NC 27103
— 620 336-842-4065
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OVERBURDEN XS 1 L 1,1111111V""
HORZ: 1 •=40' / 19
VERT: i •=20' N
SKIMMER BASIN #22/. � 11 + S.D.O. #22 ` [ I / �/ \� �i -n / 0 \ \ ,\ \ \ \ % \
� NCDOT STEEL
/ \ BEAM GUARDRAIL
/ \ 225 LF (FACE AT E.P.),
/ SKIMMER BASIN #4/ ' / ( \pG ��� O O
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Mr. Chad Threatt, VP
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WATER ELEVATION (WE) - 594' /- \
I x o ti BOTTOM - 579' (DETAIL 4/C401)
INING ` °cam S MSIN #13/ l,
SKIMMER BASIN 26 S.D.O. I
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r 1 ADDITIONAL STREAM INFO - ALAM. AGG.
1 1/20/20 &LAND QUALITY COMMENTS
F N0: DATE: DESCRIPTION:
BASIN SKIMMER BASIN #29/' �� REVISIONS
S.D.O. #29 /
����' PROJECT NUMBER:
` SKIMMER BASIN #11/ ! / / //� r i\\ ` 2190335
S.D.O. #11
\ \ r r s / -- l� DRAWN BY: KCG/ATC
\\\ r.
REVIEWED BY: PAS
ISSUED FOR
Mai
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640 CONSTRUCTION
DATE:
1 /23/20
DRAWING NAME:
630
PLANT1 1 '
1
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✓ \ \ \ I �d I I I WR� t aSa LEGEND l / I 3gS� \ \ \ THE INITIAL CRUSHING PLANT WILL BE A MOBILE `PLANT THAT
l
I I I / O �/ o /_ _ -\ �' / s \ WILL BE ABLE TO MOVE THROUGH THE PHASES OF THE QUARRY.
Z (� \ — / `0o PHASES 1 THROUGH 4 OF THE MINE ARE SHOWN.SHO / PROPERTY LINE
EXISTING BUILDING DURING THE START UP OF THE QUARRY, THE CRUSHING PLANT I MAY INITIALLY BE IN THE GENERAL LOCATION OF PHASE 2 AS
PROPOSED BUILDING SHOWN IN ORDER TO SERVE THE PHASE 1 EXCAVATION SITE.
o\--�i -,.- \\co,ote\lC�fr.�,\//�, �'�-.`� v_�\ /\ `,f✓ \ \\.���\�~�'\Atef I \_% ,�'\°Qm, r���� I`'\, \ �\l%_'� �(\�~v/ l A�` \�� y l" \ \\l\ \ vm\\ ] I �1,�,�rv\'�/T 1�\•i,���f`,\-'� � r`/ �-Jf -�\ � .I e �\ -. ,.—V l '` 1 �? 1-n �,"i�1 1�. ��`�)_`,_:/:�:/ % , 1'\� � /'�.i�E , \iI I \�I 1VVV �l /_l\/\ ��- / (rI /-\!/ / i ` \�\ I/lI
0, 1
"��l�I A �'1`I �/ �A`I Il"/ I\ �� \I/�I � � -�\l�, .-� w;°I ` � ifIf � \ c��\ /�I \ ./ .�\I /I- \I :\��f_...-( \"_/�_G..�_V> .T_ / A- .\ \//.P...., O.:�,-,y,�0_\ _0/ i_1fI� �f/� -'J � ' -'-\ \�l/_I • >_—a\/—� , f-/_—�-/ �,"\\ ."-....��"\ /.��. ---�\--`\ " `s--\!`�- l \,\\ \\J�` ;\ , \ �/ /,.M,'./��- I -NE. / .PERI I� M— fETE/RX
rn PROPOSED SECURITY ,I —�\ -�7 ,1 r...FrE—r-\NC� E X\—�X \\—\X\v --''--X—
CJ 50' UNDISTURBED BUFFER _.._ ._.._._.._..- II I i \ ��'j�. _�x"� a \%y �_-� �_�_\_ � ,\,`-�te-— \a (- _/ � . ✓1 ' if', _ i ,\�i~/�'..`-"-�'--a�''�'./" -._/� —_.f_`.- '_~,- -`,,.�--,l:Y- —~/zf ,��-n,_—'��f --_ _ (`/ ,/ ��_�--� I .( /f1-._..'_/� / o I / `,l ���l / -f'.\ ,0.'-,J
100 STRUCTURE SETBACK BUFFER -- - - - - --
125' OPERATIONS SETBACK BUFFERyPROPOSED SKIMMER BASIN
FJ
DISTURBED AREA IN�LIMITS
NLGO TRE, TENING
LA NEddESSgAREG MSCD 7-
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LaBeLLa
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615 St. George Square
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Winston-Salem, NC 27103
336-842-4065
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labellapc.com
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ADDITIONAL STREAM INFO - ALAM. AGG.
& LAND QUALITY COMMENTS
NO.
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
DRAWING NAME:
DRAWING NUMBER:
1 /23/20
IM1,1l:1»:1 1

PID: 1027DO
SNOW CAMP W71ST CH
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CHARLES J BYRD
RECLAMATION PLAN
HALF OF OVERBURDEN SOIL TO BE SOLD DURING MINE OPERATION. OTHER HALF OF OVERBURDEN TO BE
USED TO FILL THE TAILING PONDS, ALL SKIMMER BASINS, AND THEN EQUALLY SPREAD AND COMPACT
REMAINING SOIL OVER GRAVEL PLANT AND STOCKPILE AREAS.
Hamm
Lim
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61.5 St. George
Suite i
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ROY J. AND TANYA B. VE AZQUEZ
no Mr. Chad Threatt, V
N0: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
CONSTRUCTION
DATE:
7/18/19
DRAWING NAME:
7
J
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1
1I �
\ f�� PERIMETER SECURITY
FENCE TO CLEAR SPAN r \ \
JURISDICTIONAL AREA 1
EET C302 FOR
/ \
`^-- ---. STONE OUTLET TYP.)KIMMER BASIN BAFFLES
SEE DETAIL 7/C502 ND GRADING, (TYP.)_
SKIMMER BASIN "SKIMMER BASIN 1 6?
�r ---- -_,_- --. #
-#16/S.D.o. #16 /S.D.o #1
/!///',�=- ✓ LIMITS OF
0
0 DISTURBANCE'
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DISTURBANCE
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SEE DETAIL 2/C501 U / \ I
SKIMMER BASIN
` \ t \ OF
SKIMMER
#22/S.D.O6ASIN.#22 e DISITUR ANCE
\
// r / / / SKIMMER BASIN #10/S.D.O. � � \ 65.00 LF �l
e/ ff (STORM DRAINAGE OUTLET) #10 of 15" RCP ^,JC = \ 50' UNDISTURE
SKIMMER BASIN a BUFFER
SKIMMER BASIN AC' #13/S.D.O #13, e f
�U LIMITS OF\ / f �✓ #8/S.D.O
DISTURBANCE
V o
9f� LIMITS OF T 3
_z �C�/ / /! ! // SKIMMER BASIN A^
#15/\.D.0 #15) hSTP�LIOeS �\ / �2
TEMP. SEDIMENT--
TOTAL DISTURBED AREA = 86.37 ACRES
EROSION CI
1. OBTAIN GRADING/EROSION CONTROL PLAN APPROVAL AND PERMIT.
2. CONTACT EROSION CONTROL INSPECTOR TO ESTABLISH A PRE CONSTRUCTION CONFERENCE AND INSPECTION
SCHEDULE.
SELF INSPECTION ----- EFFECTIVE OCTOBER 1, 2010, PERSONS CONDUCTING LAND -DISTURBING ACTIVITIES,
LARGER THAN ONE (1) ACRE MUST INSPECT THEIR PROJECT AFTER EACH PHASE OF THE PROJECT, AND DOCUMENT
THE INSPECTION IN WRITING ON APPROVED FORMS,
THE PHASES ARE AS FOLLOWS:
1. INSTALLATION OF PERIMETER EROSION AND SEDIMENT CONTROL MEASURES.
2. CLEARING AND GRUBBING OF EXISTING GROUND COVER.
3. COMPLETION OF ANY PHASE OF GRADING OF SLOPES OR FILLS,
4. INSTALLATION OF STORM DRAINAGE FACILITIES.
5. COMPLETION OF CONSTRUCTION OF DEVELOPMENT,
6, ESTABLISHMENT OF PERMANENT GROUND COVER SUFFICIENT TO RESTRAIN EROSION,
3. CLEAR SITE ONLY AS NECESSARYTO INSTALL INITIAL EROSION CONTROL MEASURES AS FOLLOWS:
A. TEMPORARY CONSTRUCTION ENTRANCE/EXIT AT CLARK ROAD.
B. THIS SITE HAS TEMPORARY SKIMMER BASINS AND SEDIMENT BASINS AS SHOWN.
C. TEMPORARY DIVERSION BERMS
D. TEMPORARY SILT FENCING AND STONE OUTLETS
E. SEED EMBANKMENTS AND DISTURBED AREAS OF DEVICES (INCLUDING "CLEAN" WATER DIVERSION) UPON
COMPLETION OF CONSTRUCTION. SEE GROUND STABILIZATION CRITERIA BELOW FOR MORE INFORMATION.
4. BEGIN CLEARING, GRUBBING, AND STRIPPING OF SITE AS REQUIRED.
EARTHEN -MATERIAL STOCKPILES ON -SITE FOR LATER DISTRIBUTION AND/OR REMOVAL. AREAS DEDICATED FOR
MANAGEMENT OF LAND CLEARING AND DEMOLITION DEBRIS, CONSTRUCTION AND DOMESTIC WASTE, AND
HAZARDOUS OR TOXIC WASTE SHALL BE LOCATED AT LEAST 50 FEET AWAY FROM STORM DRAIN INLETS AND
SURFACE WATERS (UNLESS IT CAN BE SHOWN THAT NO OTHER ALTERNATIVES ARE REASONABLY AVAILABLE), AND
WITHIN AREAS PROTECTED BY EROSION CONTROL MEASURES.
5. BEGIN SITE GRADING. MAINTAIN EROSION CONTROL DEVICES IN ACCORDANCE WITH THE MAINTENANCE PLAN.
INSTALL ADDITIONAL EROSION CONTROL MEASURES AS REQUIRED.
6. INSTALL STORM DRAINAGE SYSTEM AND UTILITIES. STORM PIPING MUST BE INSTALLED TO THE POINT WHERE IT
ENTERS EACH DEVICE, COMPLETION OF PIPING WILL ONLY BE ALLOWED ONCE THE SITE HAS BEEN DEEMED STABLE BY
THE EROSION CONTROL INSPECTOR. INSTALL PROTECTION AROUND ALL INLETS AS STORM DRAIN SYSTEM IS
INSTALLED.
1 ` \
tFENCE (TYP.)
/ SEE DETAIL 2/C501 t �� FR `� I I ' V I / ✓� `` {/ // ' Y��
SKIMMER
F' BASINt
DESCRIPTION
STABILIZATION
STABILIZATION
TIMEFRAME
TIMEFRAME
EXCEPTIONS
PERMANENT DIKES
SWALES DITCHES &
7 DAYS
NONE
SLOPES
SLOPES STEEPER THAN
7DAYS
IF SLOPES ARE 10OR LESS IN
3:1
LENGTH B ARE NOT STEEPER
THAN 2.1, 14 DAYS ALLOB O
SLOPES 3:1 OR
14 DAYS
7 DAYS FOR SLOPES, 50,
FLATTER
IN LENGTH
ALL OTHER AREAS
WITH SLOPES
14 DAYS.
NONE
FLATTER THAN 4:1
/ I F� ~ TEMPORARY DIVERSION - / r / \
/A STONE OUTLET (TYP.) 1 µ SKIMMER ^#6/S.D.O` f / / //�� S
F£!� SEE DETAIL 7/C502 BASIN^ #6 t ~.." DITCH (TYP.) / / T / ��
YYY»> \ / 50' UNDISTURBED o
�# / 6 a 1 I SEE DETAIL 3/C502 /� J / / / �� BUFFER
'\ Y � Q 5 S.D.O. ``-� e �/ ! � /
/ � �,/-f-/ /
DISTURBANCE #5 T� I / SKIMMER BASIN / ` / �j� / / "•, ' (� I �/`" SKIMMER BASIN l ( "� 7. PRIOR TO THE CONTRACTOR DEMOBILIZING FROM THE SITE (AT APPROXIMATELY 45 DAYS PRIOR TO
// / ) #21/S.D,O. 21.
/� f'"",! ,p' `l,, SKIMMER BASIN #7/ #27/S.D.O #27�//' /`�^ --''� / r # '"�. DEMOBILIZATION), THE FINANCIAL RESPONSIBLE PARTY (OR THEIR DESIGNEE) WILL NOTIFY THE ENGINEER AND THE
°•� f / -^'`" 70.00 LF ..,\ - \` S.D.O R / / / �'"• e �.''/ / -..-/� / /// ter' �,. -- � DESIGNATED EROSION CONTROL INSPECTOR OF THEIR ANTICIPATED DATE TO LEAVE THE SITE. AN ON -SITE
SKIMMER BASIN '� OF 15" RCP �'` /"- -� �?)� ! � / /�/` `----=-j Of� / / ' I / `e / � %-'/ / / / ,.�''., /�/ � I ) I / ' 'INSPECTION WILL BE CONDUCTED PRIOR TO THE LEAVE DATE BYTHE ENGINEER AND/OR B THE DESIGNATED EROSION
CONTROL INSPECTOR TO MAKE CERTAIN ALL ACTIONS ITEMS HAVE BEEN ADDRESSED BYTHE CONTRACTOR.
#14/S.D.0 #14r / PROP. ✓/ % / I ! t Ire /
/ _ KEYSTONE STREAM CROSSING SKIMMER BASIN 50' UNDISTURBED /` / \
\ STRUCTURAL PLATE ARCH / / BUFFER / F ) / J ` / 8. CONTINUE TO MAINTAIN EROSION CONTROL MEASURES.UNTILREM VEGETATIVE COVER HAS BEEN ESTABLISHED
DISTURBANCE---� \TWALL "V' 1 I I METAL' 24' SPAN x 10'-4" `, ✓.#24/S. D.O. #24 ( �^ ._.- 7 / J OVER ALL DISTURBED AREAS AND SITE HAS BEEN STABILIZED. REMOVE EROSION CONTROL MEASURES ONLY
SKIMMER BASIN AFTER FINAL INSPECTION AND APPROVAL BY ENGINEER.
f / U SKIMMER \` RISE BRIDGE CULVERT BY %/
CONTECH CONSTRUCTION •�'� / T' -/ / J / 4 EROSION CONTROL MAINTENANCE PLAN (CONTRACTOR MUST INCLUDE MAINTENANCE IN BASE BID)
400 r 6LF PRODUCTS % a ' \ #20/S.D.O. #20, �/ / 1. INSPECT ALL SEDIMENTATION AND EROSION CONTROL DEVICES FOR STABILITY AND FUNCTION EACH WEEK
�/�~ OF 15" RCP '.`.� c' _'--- ` t �.. 1 % �/" T `�I ',.� \ )I\,. ,/` / 1 /'- LIMITS OF --='� w / MINING LIMITS X } `' j`�� e / '�..,, / AND FOLLOWING EACH RAINFALL EVENT.
9y DISTURBANCE V_ / / %/ f / // // / � / 2. REMOVE SILT/SEDIMENT FROM TEMPORARY DEVICES WHEN ACCUMULATED VOLUME HAS REACHED 50%�� ` SKIMMER BASIN / / e /// / /' /// / / CAPACITY.
P 26 S.D.O 26 / / /
LIMITS OF r TEMP. CHECK DAM �`^ \ # / # �'-- / / �/ ! -�.;/ / / r y4. / �/ 3. REMOVED ACCUMULATED SILT/SEDIMENT FROM BEHIND TEMPORARY SEDIMENT FENCE WHEN DEPTH
/ -- DISTURBANCE TYP. \ / ` 139.73 LF l e /' �%
SEE DETAIL 4/C501" -T~��' / h° \ \ \ ........... ROXIMATELY 0.5'. REPAIR AND REPLACE SILT FENCE AS NECESSARY.
\ / ✓ f // - LIMITS OF \' \a .s OF 18" RCP Z e L. / ° _ Q
-""- 48.03 LF ""�, TEMP. SEDIMENT \ 4. SEED AND STABILIZE TEMPORARY DIVERSION BERMS IMMEDIATELY AFTER CONSTRUCTION
'" ` \.. DISTURBANCE } ''/ LIMITS OF '� FENCE (T 'P.) INCLUDING 'CLEAN'WATER DIVERSION BERMS. RE-GRADE/REPAIR BERMS AS REQUIRED.
OF 15" RCP \; \` I e� DISTURBANCE rj SEE DETAIL 2S/C501\ \ \ \ ` \� T`'
>� \ E ^� 5. CONTRACTOR SHALL APPOINT AN ON -SITE INSPECTOR AND MAINTAIN RECORDS OF INSPECTIONS IN
ACC1 P r I \ / j /' D / � \ 26.90 LF \ '\\\ \ \ , �' ��\ / / / / I `-,---- ,.--'' ���--•.��'^ Jp \ \\� �'p\ ` ` I , \�O " �-O\ CONSTRUCTION ACRDANCE WITH TIVITIES.
SKIMMER OF THE GENERAL NPDES STORMWATER DISCHARGE PERMIT FOR
SKIMMER BASIN ` \ / OF 15" RCP { 1 ` /
#18/S.D.O #18 \ \ ��\� \ 1 I I / r /� \ % ~ y
\ i \ \` I I TEMP. SEDIMENT �/% ~ \l ( f \\\
FEES 2 , \ \ ` P� I `\, � � � 70.005LFRCP FENCE (TYP.) \ � �, �.� DETAILED CONSTRUCTION SEQUENCE
LIMITS OF� \ SE` DETAIL 2/C501s0
DISTURBANCE I PROP. SEPTIC / "- -- e / \ t` ? D �`- 1. CONSTRUCT THE TEMPORARYSURGE STONE CONSTRUCTION ENTRANCE{EXIT OFF CLARK ROAD.
7 / do / e SKIMMER BASIN \ �'
80' OF ( / \ \ FIELD / W -' V #19/S.D.O. #19 2. INSTALL SILT FENCE AND STONE OUTLETS FROM CLARK ROAD TO THE SOUTH SIDE OF THE STREAM
24" RCP/ ` ! �/ ( �- \� �\ \tom / \ \
r �`�., -,,.- `"'\ • ���.� L,30 9 LOCATED AT 16+87, SILT FENCE TO BE LOCATED ON BOTH SIDES OF THE ROAD AND SOUTH BANKS OF
(� TEMPORARY % ! TEMP. SEDIMENT \ E H -
FES 1 CONSTRUCTION / / I t FENCE (TYP) ( \\ ` A SKIMMER BASIN BAFFLES _ % \ \ J ( THE STREAM.
ENTRANCE/EXIT o ` AND GRADING, (TYP.)
a / / \\
�1 f SEE DETAIL 2/C501 ) , SKIMMER BASIN \ SO' (/ \ ""` -�.. / - :� ` \\ ` \ 3. INSTALL SKIMMER BASIN 6 AND SKIMMER BASIN 7 AND THEIR ASSOCIATED TEMPORARY DIVERSION
SKIMMER BASIN �� \ , #25/MINE STR N�IST I -- ✓ �` AO \ DITCHES AND SLOPE DRAIN (IF CALLED FOR).
#17/S.D.0 (STORM \ \ ` \ / ` DEWATERING J �M
DRAINAGE OUTLET \\ /\�.. / �NFF TEMP. SEDIMENT
STONE PIPE INLET ,% S.D.O #25 7��" R ._...- r-- 4. INSTALL IMPERVIOUS CLEAN WATER DIKE AND BYPASS PUMPING SYSTEM AS SHOWN ON SHEET C402,
FENCE TYP. �'�• �A �, \ INSTALL THE PERMANENT 54" PIPE AND ENDWALLS AT STATION 16+67.
PROTECTION #17 ` (TYP.) 6 8 14
m / -.. 1 --. `\ / ��` �'`• ~• � � - � �__', � �,„._.-gJ� SEE DETAIL 2/C501 _. '`.`. %r/ / � � y� s�z.�� \ \ \
n/ n \ SEE SHEET C302 FOR� \
O r �1 \ f LIMITS OF 5. APPLY 10" STONE BASE LAYER TO ENTRANCE ROAD AND COMPACT.
CH SKIMMER BASIN BAFFLES \ !/ ,/ �-�-.. .DISTURBANCE �.. ` /
-1-1 'F Z \ AND GRADING, (TYP.) \ '`� •� / '^----- .�` \ ` ` �. ^" - -`"" ,,r` ! ���. �' s70 � 6. BACKFILL, PREPARE SLOPES AND OTHER DISTURBED AREAS AND STABILIZE.
O / �_ ~� �`\ , % `""-"""•� �\ C 7, INSTALL SILT FENCE AND STONE OUTLETS ALONG NORTH SIDE OF THE STREAM.
/ = D �\ \-.,�} j �,,,. l ____.� \ ~' \ , ` 7 e,.---\\ ;oo�---.--•--' �_ 8. INSTALL SILT FENCE AND STONE OUTLETS AROUND THE EXISTING STREAM BUFFER AND PROPERTY
'r \\ �'�-: •� �" --"`\ - --------.$J' CIDF-- - - BOUNDARY (WHERE DENOTED ON PLANS). INSTALL SKIMMER BASINS 4, 5, 13, 11, 3, 2, 1, 12, 8, AND
\ \ C 10 AND THEIR ASSOCIATED TEMPORARY DIVERSION DITCHES AND SLOPE DRAINS (IF CALLED FOR).
furl' �j o ` I �"" - �\ =.�"� ��`. \. \ ~ \� \ l ` \ \ \\ �\ ` ✓ 1`e"` _ / ,. 9. PLACE ALL SILT FENCE AND STONE OUTLETS DOWN SLOPE OF ALL PROPOSED BERMS.
D `� sS J _ \ \ \ \ \ % \ , 00, \ a / � \ / yam¢ /
/ 0 o _ �\- ) X \ 1 ' \ �S R� \� / 9c�?�p�, 10. BEGIN GRADING THE INITIAL MINE AREA, MOVE AND PLACE MATERIAL FOR BERMS. PLACE AND
/ \\ J 1 fr7 ,� ,�/ COMPACT MATERIAL FOR PLANT AND STOCKPILE AREA. ALL BERMS SHALL BE CONSTRUCTED AND
-P ` \ �- ~`"� I ( ' / /( 6 "-"-- \ \� '•^\ ��'\, \ , �"'`-•.� '"�' �� J f / ' ` 1 �TBC1 �1 ~y - -_ `-�\ �� �� c'/ STABILIZED WITHIN 1 YEAR OF STARTING MINING ACTIVITIES.
Fri
11. CONSTRUCT TAILINGS PONDS BEFORE MINING OPERATION BEINGS.
STORMWATER SEWER CALCULATIONS AND DESIGN TABLE
00 ~� ��% -""` \ ^�\'�r `} �`� INLETQ BASED ON 4"/HOUR 12.SEED AND MULCH ALL AREAS THAT ARE NOT COVERED WITH ASPHALT OR STONE.
STORM RETURN PERIOD: 10 Yr for OC 5 Minutes
C: FT1
640
a
LEGEND
EXISTING PROPERTY LINE
- -
PROPOSED PROPERTY LINE
--
EXISTING BUILDING
L_J
PROPOSED BUILDING
MINE PERIMETER
PROPOSED SECURITY FENCE
-X-x-x-x-
TEMPORARY DIVERSION DITCH
TD->
TEMPORARY SILT FENCE
PROPOSED ENERGY DISSIPATOR
TEMPORARY CHECK DAM
v
MINE HAUL ROAD
DISTURBED AREA
STONE OUTLET
p
TEMP. SLOPE DRAIN
STONE INLET PROTECTION
S.D.O.
STORM DRAINAGE OUTLET
�
SKIMMER BASIN
#2/S.D.0 #2
I
( If
SKIMMER BASIN r ��
#3/S.D.0 #3 c, J
I ' J SEA S ET 302 FOR
e SKIMMER BASIN BAFFLES
NO GRADING, CLEARING, OR OTHER
CONSTRUCTION ACTIVITIES TO OCCUR
WITHIN THE 50' UNDISTURBED STREAM
BUFFER UNLESS PRIOR WRITTEN
APPROVAL IS GIVEN.
t
/ ( I AND I GRADING, (TYP.) 60
CONTRACTOR TO PROVIDE CURLEX I \
EXCELSIOR MATTING ACROSS THE \\
ENTIRE LENGTH & WIDTH OF ALL \I\
SLOPES 3H:1V AND STEEPER
STONE OUTLET (TYP.) \ \�
SKIMMER BASIN` �\�\ SEE DETAIL 7/C502
#29/S.D.D. #29 \ PERIMETER SECURITY
\ O
!, \ FENCE TO CLEAR
JURISDICTIONAL AREAS \
LIMITS OF
DISTURBANCE U
TAILINGS POND #2
I17A.1,1uy r ~ `?TEMP. SEDIMENT\
SKIMMER BASIN
FENCE \
#11/S.D.O, #11 SEE DETAIL
2/C501
1\`'\
50' UNNSTUR ED '% I
- BUFFER
a �\LIMITS OF
I DISTURBANCE _..-Ny r�
a
o�
BASIN.
p\�`3
13. STABILIZE ALL CHANNELS AND SLOPES WITH MATTING AS NOTED ON THE PLANS.
SEEDING NOTE:
--.. �^------- SEED MIXTURE, SEEDING RATE, AND SOIL AMENDMENTS TO
BE APPROVED BY AN ENVIRONMENTAL PROFESSIONAL AND
-- -.� SUBMITTED TO OWNER AND ENGINEER PRIORTO
APPLICATION, SEED MIXTURE TO BE A MIXTURE OF RED
CLOVER, CREEPING RED FESCUE, AND A GRAIN, SUCH AS,
y OAT, WHEAT, OR RYE.
/ RUNTORCEDCONCRETE PIPE(RCP)TOBECLASSM,PIPEJOINTSPER ASTMC443;TYPE2PIPE INSTALLATION ASTMC1479
/100 I00 200 3000 i / " 7 n� _ DROP INLETS I & 2 TO BENCDOT STANDARD 840.14 WITH 840.16 FRAME& GRATES
r7 FLARED END SECTION (FES)
l \ CONTRACTOR NOTE:
I/ REFER
FOR SKIMMER BASIN
2
X 1 I / \ S���Fr_dn\\ „ten\Y r / \ \ `1
BAFFLES AND GRADING
TYPE
GRATE
RIM
FROM
TO
INLET
AREA
(Ac.)
INLET
Q
CFS
TOTAL
AREA
(Ac.)
I
(in41r)
C
Q
CFS
GRATE/
RIM/
THROAT
FROM
INV.
(ft)
TO
INV.
111)
APPROX.
LENGTH
(ft)
SLOPE
%
N
D(THEO.)
(inches)
PIPE
SIZE
(inches)
PIPE
MATERIAL
N/A
FES 1
FES 2
7.91
9.49
7.910
7.04
0.30
16.71
N/A
612.59
611.79
80.00
1.00
0.013
21.40
24
RCP
840.16
DI
DI2
0.45
0.90
0.450
7.04
0.50
1.58
632.50
630.25
626.95
126.90
2.60
0.013
7.39
15
RCP
840.16
D12
FES 13
0.19
0.61
0.64
7.04
0.80
3.60
629.20
626.95
624.48
48.03
5.14
0.013
8.86
15
RCP
N/A
FES 3
FES 4
4.24
5.09
4.240
7.04
0.30
8.95
N/A
600.24
597.31
64.00
4.58
0.013
12.73
15
RCP
N/A
FES 5
FES 6
2.51
3.01
2.510
7.04
0.30
5.30
FN/A
630.50
628.00
70.00
3.57
0.013
10.9G
1.4
RCP
N/A
FES 7
FES 8
5.52
6.62
5.520
7.04
0.30
11.66
N/A
617.75
61G.00
139.73
1.25
0.013
17.93
18
RCP
N/A
FES 9
FES 10
0.31
0.37
0.308
7.04
0.30
0.G5
N/A
6t 1.00
607.00
65.00
6.15
0.013
4.51
15
RCP
N/A
FES 11
FES 12
3.24
3.89
3.240
7.04
0.30
6.84
N{A
609.60
606.92
- G4.00
4.19
0.013
11.71
t5
RCP
0.3 LaBeRa
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Suite 300
Winston-Salem NC 27103
336-842-4065
C#0430
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F`k%%%IIIIIII// T
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i•
A- _
22052 ;
© 2019 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Mr. Chad Threatt, VP
Snow Camp Mine
1
1/20/20
ADDITIONAL STREAM INFO -ALAM. AGG.
& LAND QUALITY COMMENTS
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
DRAWING NAME:
DRAWING NUMBER:
OVERALL
.N, U111NIU1119JI11
PLAN
&I

STONE OUTLET {
f 1 / l Q j t fi SKIMMER BA S.D.O. #15/#15,SEE DE(AIL� ii a.
_._ LEGEND � / f � r/ f� / f ®�.." � ` -- .. �7/C502 � �`
EXISTING PROPERTY LINE r - '" ,. / C ®""
PROPOSED PROPERTY LINE" / f 1 LIMITS OF r
1 - DISTURBAN E
EXISTING BUILDING lr
E_J -p / O; Jl % ®® SPILLWAY (SEE SHEET
TEMP. SEDIMENT % PI ® C302 FOR SKIMMER
PROPOSED BUILDING
FENCE (TYP.) -" ® BASIN DETAILS),
MINE PERIMETER VJ T — ---' SEE DETAIL 2/C501 0® s�
FES 4
PROPOSED SECURITY FENCE—x—x—x—x— / _ SKIMMER BASIN #14/ f� 1 O INV.=597.31
S D 0 14 f ,✓`�f 64 00 LF
TEMPORARY DIVERSION DITCH TDB— O - " -' • • # t - \ 1, . , /
H STONE OUTLET (TYP.) f 1
SPILLWAY SEE SHEET OF 15" RCP I
TEMPORARY SILT FENCE ( SEE DETAIL 7/C502 6
C302 FOR SKIMMER LIMITS OF / „ 600 \ n ,\
PROPOSED ENERGY DISSIPATOR ® BASIN DETAILS) \ / _
f / DISTURBANCE
TEMPORARY CHECK DAM o C� (_0 -�
MINE HAUL ROAD f 610 --- -� 608
610
FES 12 /
DISTURBED AREA ( f �\ �C INV.=606 / 616
. ; . .. CLASS I RIPRAP
STONE OUTLET p - STONE INLET f� 3.75'Wx10.5104.25'W 27"
}
�J PROTECTION v V
620 _ THICK WITH NCDOT TYPE 2 FABRIC UNDERNEATH v A
TEMP. SLOPE DRAIN ( / j —_ -' \
_ 622 ---- ,
STONE INLET PROTECTION
n O .,. FES 3 �
A,� ryp __.. INV.=600.24
S.D.O STORM DRAINAGE OUTLET ` CLASS I RIPRAP
' '
C '" 3.75Wx9Lx10.25W 27r
\ THICK WITH NCDOT TYPE",, __.
2 FABRIC UNDERNEATH \ \
w
\ / STONE INLET\ 64.00 LF
PROTECTION OF 15' RCP
FES 11 _.
/' ``.,, � f f � .,,• INV.=609.60 � �... __.._..-....,,�... ` , �,rr' �;, �'-.__-_.__.,.._ ^.*....a � ...,, � 4 ,,.,, � ~\ k��? \ \ •ti
LIMITS OF \ o \ L J
ka~ 1 1 LIMITS OF DISTURBANCE 7
/ DISTURBANCE
CHANNEL FROM EAsn18" RCP TO FES 2NTS I g,4 ,r
O
Z
4
590
__ _._ SKIMMER
__- BASIN #5/
IS.D.O.#5' �
8' WIDTH OF CURLEX Ia��� \ i i
EXCELSIOR MATTING OR H 11 EDW 1
APPROVED EQUIVALENT I ` 1 _
r +
01 FF$ 2 TO STA. a+50 AND ACCESS ROPD (WEST SIDE) FROM STA 7+00 TO 14+00
NTS
:3-1DITCH #3 - SEE r r
DETAILS FOR nv
8' WIDTH OF CURLEX I -. ___.. STABILIZATION _ ..___. I 'rn I o `
i
Ra
LrE=13 LaBe
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
T I
�s��Rt11CARp'�i,, I
0,//�Z A. ST1vR N' `�`
'��� Illll,t�� �1
L %
T
I
© 2019 LaBella Associates
1 l 1
I,
Chad M
EXCELSIOR MATTING OR \ "
C) EXIST. 12" RCP APPROVED EQUIVALENT
(� BOTH ENDS BURIED
\ \ '-----.-INV. = 610.89 / a�
/ \ (BURIED) � _--- --`"
/ 3 3 6$0 PROP. LOCATION OF
�� >• j SEPTIC TANKS I %
11 1 1 EXIST. 18" RCP h I 2'
Y
/ INV. = 610.89 r' •/ o
= _. f #5R WASHED STONE &
INV. 610.49 \ N
1 DITCH #8 - SEE (BURIED) ' ' f, WIRE INLET PROTECTION
DETAILS FOR '^ ` STONE OUTLET
CLASS I RIPRAP
STABILIZATION (TYP. ( /r 3.75'Wx9'Lx10.25'W 27" ` kk;
CLASS I RIPRAP SEE DETAIL / PROP. LOCATION OF THICK WITH NCDOT TYPE
1 _
/ 6'Wx14'Lx20'W 27" THICK / I 7/C502 l WELL AREA 2 FABRIC UNDERNEATH
t o
WITH NCDOT TYPE 2 / a s SKIMMER BASIN #18/ ` } a
FABRIC UNDERNEATH S.D.O. #18
/ FES 2
INV. 611.79 SPILLWAY (SEE SHEET FES 13
/ f 0 1 t
_ _ \ `
= � `�� o r ,
N C302 FOR SKIMMER ` DITCH #1 - SEE r / \ INV.=624.48
BASIN DETAILS) i} DETAILS FOR
STABILIZATION 48.03 LF I ,p Snow Camp Mine
15" RCP
EX. EOP / DI 2 $
( \\`
ELEV. = 616.09 i � f I I _ '�' � � ` GRATE=629.20 � y.
_ - o0 633.46 INV.=626.95
#57 WASHED STONE &
10' X 70' o ( _ - o E WIRE INLET PROTECTION
633.08
O / \ f }
SIGHT TRIANGLE /, z X .•� 0 63A
STONE OUTLET (TYP.) f
SEE DETAIL 7/C502
X } DI 1
ROCK PIPE GRATE=632.50
f INTLET 80' OF 24" RCP X o NV.=630.25 FENCE SEDIMENT
)
PROTECTION 01.0% r1 f 126.90 LF ti
620 OF 15" RCP \ r� SEE DETAIL 2/C501
FES 1 _. f % ._, .�._ 40 �LIMITS
NOT O� .r \ _� DA
INV. = 612.59 _ // DISTURBANCET DESCRIPTION:
REVISIONS
PROJECT NUMBER:
DISTURIBANCE 2190335
DITCH #4 - SEE 1 0 \ �'
// J � `J� DETAILS FOR �" � � �'. DRAWN BY:
/ SKIMMER BASIN #17 / / - f STABILIZATION `f STONE OUTLET (TYP.) e d, ti \ KCG�ATC
SPILLWAY (SEE SHEET /S.D.O #17 / DITCH #2 -SEE / f
C302 FOR SKIMMER / DETAILS FOR r ( r I I SEE DETAIL 7/C502 - FENCE (TYP) SEDIMENT `4
BASIN DETAILS) / STABILIZATION / { I REVIEWED BY: PAS
/ % / I I 4" �� SEE DETAIL 2/C501
�^ t \ ISSUED FOR: I
v J CONSTRUCTION j
r ! / TEMP. SEDIMENT f
Channel Side Slope Bottom Width Discharge Bottom Stabilization Side Stabilization % / , FENCE (TYP.) ti DATE:
Description Max. Bed Slope r , / / / SEE DETAIL 2/C501 r 20' l I ' \t 7/22/19
s Number o (H:V) (ft) Ids) Method Method
o FES 1 TO STA. 6+50 AND ACCESS ROAD (F SIDE)FROM STA. 8+50 TO 14+00
1 FES 2 to STA. 6+ 50 2.90% 3:1 2 7.05 Curlex I Curlex I H s , DRAWING NAME:
2 FES 1to Sta. 6+50 2.96% 3:1 2 12.66 Curlex I Curlex 1 (2)AND ®
m 3 West Side Access Road Sta. 7+00to 14+00 4,10% 3:1 2 3.5 Curlex I Curlex I f/ �j \
a 4 East Side Access Road Sta. 8+50to 14+00 3.63% 3:1 2 5.12 Curlex I Curlex 1 f i
0 8' WIDTH OF CURLEX I g
0 5 Access Road (West Side) Sta. 18+50toSK6 11.25% 3:1 2 4.55 Curlex III Curlex III r'' / PROPOSED SEPTIO FIELD 611= ®i
g "' EXCELSIOR MATTING ORI'
ti 6 SK 8to Stream Buffer 6.93% 2:1 3 13.64 Curlex III Curlex III APPROVED EQUIVALENT
7 Exist. 18" RCP to FES 2 1.00% 2:1 1 20.59 Curlex I Curlex I f; E I NT TI
ON
5;18 SK6 o Sta. 20+00 3.25% 2:1 2 4.55 Curlex I Curlex I / ` J EROSION CONTROL
Y 9 SK Ito Sta. 20+00 3.50% 2:1 2 5.81 Curlex I Curlex I 3 3 / f \ \ M AT C H L I H E— LAN
_�_ / 1 / T ,
U
SHEET C301 D 20' l
N E , / DRAWING NUMBER:
/-
vJ s
,.
CHANNEL STABILIZATION SCHEDULE f \ \� \ 30 0 30 6o so 120 '/ l%C30 1A
I

STONE OUTLET (TYP.)
SEE DETAIL 7/C502
PERIMETER SECURITY -- --- // SKIMMER BASIN #22/
FENCE TO CLEAR SPAN SKIMMER BASIN #10 / - j S.D.O. 22
JURISDICTIONAL AREA / \ # / 50' UNDISTURBED /
® ®_� BUFFER
I _ -
(�.
TEMP. SEDIMENT
\ ✓� / T l FENCE (TYP.)
SEE DETAIL 2/C501
/ LIMITS OF .�.►""' \� s __ "�,,...� e; , /'
y DISTURBANCEELL
SPILLWAY \ - � I � .�_ u
, ../,� STONE OUTLET (TYP.))
SEE DETAIL 7/C502 i
.. .. f�. SPILLWAY LIMITS OF
E /�A I I DISTURBAN
DITCH6 -SEE
CE y
iLIMITS OF .,)
DETAILS FOR f/n DISTURBANCE / J r�`
/ STABILIZATION / / _ H.P. �..�„� ` _ , ._,__C \
t 1 TD tZ
R LIMITS OF
y� ' DISTURBANCE
STONE OUTLET (TYP.) t\ J_ FES 10 Sf - r
EE DETAIL 7/C502 �..,g10 I \
INV.=608.00 - W 1
OF 6 5" RCP "`�-.. �
TEMP. SEDIMENT �� W Q �'
FENCE (TYP.)
I
\ SEE DETAIL 2/C501 600 10 STONE INLET _ CLASS I RIPRAP --�� x- z
PROTECTION 3.75Wx9'Lx12.75'W 27` J U , •./ ' % / `' \ , _
r
h,
FROM SKIMMER BASIN 8 TO STREAM BUFFER so4n5 - THICK WITH NCDOT TYPE'
NT 6oz.o0 610 2 FABRIC UNDERNEATH _ / / SPILLWAY; \ \
(�
© 8' WIDTH OF CURLEX III I / SPILLWAY �� -_ r a [ U W
APPROVIED EQUIVALENT T Q W + STONE OUTLET\
\\ r
FFE 605.00 SEE DETAIL 7/C502
606.00
vv
604.00 ` X DITCH #5 - SEE TEMPORARY ,IVERSI N o
DETAILS- FOR -ES 9 M�-DITCH (TYP.) TEMP.
2 ' \ o STABILIZATION INV.=611.00 `"� SEE DETAIL /502 ~' .� d SEDIMENTS _ ,_;- �o o ._--•
FENCEP
.)
soa.ls iO END OF PAVEMENT - /' UN ISTURBEDI \ .. SEE DETAIL 2 C501
co
4 \ w SKIMMER BASIN 6 l ' DITCH 9 -SEE / ` / s
S.D.O. #6 # / S SKIMMER BASIN #8/ BUER
1 I DETAILFOR - /-IFFt
S `t 600.`77 STABILIZATION S.D.O. #8 1 - - B SKIMMER BASIN #13
\AY V ` o / FROM SK 6 TO WEST SIDE) ACCESS ROAD (EAST SIDE) S.D.O. #13 s
SPILLWAY X ACCESS ROAD ( -
8 TO STA. 20+00 g FROM SK 7 NTO TS STA. 20+00
\ oa v STONE o i15" TEMP. SLOPE
\ o \ OUTLET (TYP.) ` e \ ` ( I ` DRAIN r
SEE DETAIL \ g1A. 2 +00 \ s� ' , R
8' WIDTH OF CURLEX 1 8' WIDTH OF CURLEX I \ O I
if\ .'i• �z 7/C502 ( / EXCELSIOR MATTING OR EXCELSIOR MATTING OR
APPROVED EQUIVALENT APPROVED EQUIVALENT
o \ \ RETAINING WALL STONE INLET[_/U
TEMP. CULVERT ! ' 1 / PROTECTION (TYP,)'14
EQUIPMENT
STONE OUTLET(TYP.),M j\�
' LIMITS OF I\ - SEE DETAIL 7 C502 0 • ' ATC H L I � '+ E- -
'/ It Z 2 __.DISTURBANCE } _ / \ L' C (�
SKIMMER DITCH #10 - SEE' �-- ` \ �. _ �.,_, , _ \ SHEET l E LT C 3 0 1 L ~
B v \ ( DETAILS FOR TEMPORARY DIVERSION \ \
v TE P. CHECK DAM STABILIZATION
S I Q 10 I \ DITCH (TYP.) \ Ma
SEE DETAIL 3/C502
W i SE DETAIL 4/C501 TEMP. CHECK DAM\. \
Z n• ` rn 24'xto'-4" AREA ,
BRIDGE CULVERT ` w \ SEE ` Y \
� U \� , , . I o SEE DETAIL 4/C501 A
\ \
NCDOT STEEL a ° \ U \ U \ 50' UNDISTURBED\ k
\ BEAM GUARDRAIL _ l BUFFER ~�
U I /225 LF (FACE AT E P) \ \ \
�- W I ®) SPILLWAY
Q OUTLET f CSKIMMER BASIN #7/
o STONE D.O. #7
\ =TEMP. SEDIMENT
FENCE (TYP.) \ \ U \
OMITS OF f\ ~\ SEE DErAIL 2/C501
o „"- : \ DISTURBANCE � �
_- \ \ CONTRACTOR TO PROVIDE 1
--- - \ \ ` U -`i ye U \ EXCELSIOR MATTING ACROSS ENTIRE
/ I 50, U LENGTH OF ALL SLOPES 3H,1V AND \ \
I SPILLWAY, J , J UNDISTURBED U \ STEEPER �-
�� / BUFFER
SKIMMER BASIN 4 o
S.D.O. #4 # /
i\ � �. � �� -- ;�' � � ter- _�� _...- __ �__ U�U j � i � � � � \ � � ��• � --
U,
\ ACCESS ROAD CffEST SIDE) FROM ST'A, 18+50 TO SK 6
\ Nts ' \ ' MINING LIMITS
l Q
` V \ 8' WIDTH OF CURLEX III / / / � '"� �41 a� � ' •*'° U
` EXCELSIOR MATTING OR Ul
1 APPROVED EQUIVALENT // 5 O W
BRIDGE CULVERT NEAR STA. 16+50 (NISITW
z
` ✓s:. I 1 1 / I 'L TW TW TEMPORARYDIVERSION~ -I
t ( 3 3 ' I ^ T� / / DITCH (TYP.)
ff SKIMMER BASIN #27/ SEE DETAIL 3/C502 (� i-
/ Q S.D.O. #27 BW (TOP OF
/ 2
U
Q Q DRAINAGE 30 36 so 90 120 C( I i
}1 r STRUCTURE) I I I I I
TEMP. 1 scALE: t'=zo' 40.50 LF STRUCTURAL PLATE 1° so'
��'y
' TEMP. TEMPORARY CULVERT
SILT ARCH METAL 24SPAN x \
FENCE STONE EQUIPMENT CROSSING 10'-4" RISE BRIDGE CULVERT ! _
(TYP) OUTLET / BW 598.09 \
BY CONTECH CONSTRUCTION c TOP CONCRETE
(TYP) I PRODUCTS ¢ FOUNDATION
Y
Imo• / BW LOWER STREAM
97.15 TW 600.01 BW = 591.00 INVERT BW = 591.00
1 BW (TO; % BW 593.18
( OF STRUCTURE ( / /. BW 595.36.• / 'i 21,-10"• ...< �-.- .--._._ :_,,.
tl 6o1.331 BW 593.81
BW 606.50 1 00 �'.." j 591.00 BW 593 11 595.95 60a 41 �, 24'-0" ARCH SPAN
1 BW 800.57 N /
BW 604.36 I ' ` TW ' � � 04.78 TW 604.88
so5.o4 eos.os CONSTRUCTION SEQUENCE FOR ARCH SPAN CULVERT AND
TW fi07.50
� t TW so .7z 4.85 LEGEND PROPOSED RETAINING WALLS
Tw so6.nTW
805.88 60
EOP 604.88 EOP - EOP EOP
.38 ----- -- -- -..... _..._..
EOP 605.46 605.11 605.14 / so5.3e / EXISTING PROPERTY LINE _ _ 1. PLACE SEDIMENT FENCE ALONG THE TOP OF STREAM
3 sozzo sosn EOP I BANKS.
NCDOT STEEL BEAM GUARDRAIL
STONE RETAINING WALL TO / 225 LF (FACE AT E.P.) PROPOSED PROPERTY LINE
l 6I sos.to - 2. CONSTRUCT THE TEMPORARY CULVERT EQUIPMENT
BE STANDARD III UNITS I NCDOT (STEEL BEAM soy. i o f = 1 CROSSING.
(W18"xD21"x48" - 95LBS)' GUARDRAIL AT E.O.P. 16+6t.60 h EXISTING BUILDING
I -
NEAR VERTICAL SETBACK TO I m 605.4� DINT EOP / PROPOSED BUILDING 3. ALSO, PLACE SEDIMENT FENCE AT THE LIMITS OF
608.28 EDP I1 -..__ .._-.-.._. _ _-_-
DISTURBANCE DOWN -SLOPE OF THE LOCATION OF THE
= BE UTILIZED
EOP 6os.46 ' 605.18 EOP / 805.14 605.3'8 7W 604.98 � MINE PERIMETER -- PROPOSED WALLS.
3 ( 605.11
/ / m sos.'s i m sos�z7 \ TW / PROPOSED SECURITY FENCE-x-x-x-x- 4• CONSTRUCT THE LEVEL CONCRETE FOUNDATIONS FOR THE
TW 606.67 � 604J04.72 5.07 f PROPOSED ARCH SPAN CULVERT.
ny \ TEMPORARY DIVERSION DITCH TD�-
o TW Tw 1W 5. ASSEMBLE THE ALUMINUM STRUCTURAL PLATE ARCH
a I 605.04 ¢ 8 804.76� ,9B so4.66 TW CULVERT AND CONNECT THE STRUCTURE TO THE
= M �I ti B sozso / TEMPORARY SILT FENCE ADJACENT CONCRETE FOUNDATIONS.
Y / TW 80Z I W 600. 5 BW 59 .e7 BW (TOP 1 591.00 5 .19 BW
{ BW 604.83 BW 603.35 591.00' STRUCNRE) BW Tw PROPOSED ENERGY DISSIPATOR
STRUC ` BW 598.37 598.29 602.00 / 6. BUILD THE PROPOSED SEGMENTAL BLOCK RETAINING
o TW 607.33 I 594.64 I WALLS ON THE WESTERN AND EASTERN ENDS OF THE
, / TEMPORARY CHECK DAM e
a� Bw eos I STTIEAM INV, I ARCH CULVERT. PLACE GEO-GRID FABRIC AND CLEAN
--- 592.00 MINE HAUL ROAD
/ / WASHED STONE AS THE WALLS PROGRESS VERTICALLY.
_ f I /
E I WASHED STONE TO BE USED NCDOT'STEEL ` II ` e ew soo.o DISTURBED AREA El 7. MAINTAIN THE SEDIMENT FENCE &'STONE OUTLETS
? A FOR THE RETAINING WALL AND BEAM GUARDRAIL / THROUGHOUT THE CULVERT AND WALL CONSTRUCTION
ROADWAY BACKFILL FOR THE RETAINING WALL SHOP DRAWING COMPLETED BY A NORTH / / STONE OUTLET o PROCESS.
ENTIRE LENGTH OF THE WALLS
N / CAROLINA PROFESSIONAL ENGINEER TO BE SUBMITTED FOR REVIEW TEMP. SLOPE BRAIN 8. PLACE THE SEDIMENT FENCE AT THE TOP OF THE
m I I AND APPROVAL /
/ - 1 RETAINING WALLS WITH STONE OUTLETS AT THE LOW
STONE INLET PROTECTION POINT LOCATIONS IN THE VERTICAL CURVE TO ALLOW f
_...._._ 1-..___._ ___.__ 1 _..__... ...- ----- _ :..--- ---- -0LEAN RUNOFF TO DISCHARGE. /T1-1-rnnnnn Anv nl a trrnT rnl nnnnrnrr nnnnninin
H
> S.D.O. STORM DRAINAGE OUTLET
9. SEED AND MULCH ALL DENUDED AREAS ADJACENT TO THE
o a RETAINING WALLS.
/ NTS
LjE3 LaBeRa
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. p
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
U
U
U U U
© 2019 LaBella Associates
ALAMANCE
AGGREGATES, LL
Mr. Chad Threatt, VP
1
1/20/20
ADDITIONAL STREAM INFO -ALAM. AGG.
& LAND QUALITY COMMENTS
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
�J:L11i91�[Hdlili•@
111=60'
SEDIMENTATION
..1' &
EROSION CONTROL
. ( ■,
DRAWING NUMBER
ML

LEGEND
EXISTING PROPERTY LINE
— —
PROPOSED PROPERTY LINE
EXISTING BUILDING
L_J
PROPOSED BUILDING
ED
MINE PERIMETER
PROPOSED SECURITY FENCE
—X—X—X—x—
TEMPORARY DIVERSION DITCH
TD>--
TEMPORARY SILT FENCE
PROPOSED ENERGY DISSIPATOR
Dif
TEMPORARY CHECK DAM
e
MINE HAUL ROAD
DISTURBED AREA
F
STONE OUTLET
p
TEMP. SLOPE DRAIN
STONE INLET PROTECTION
S.D.O.
STONE DRAINAGE OUTLET
G
t
� �•-., , �u
\, c %� "„ �� '- `� O STONE OUTLET (TYP.)a
V ` f• NQ AR
\ / SEE DETAIL 7/C502
/ \ / l / f e \
SPILLWAY
f'�,. 12 00
,
P'ROM4E TE'R,F SE
CUR/I T'
1 r t
Cot
SKIMMER
BASIN #21/
S.D.O. #21
/ \
{ 7 I / / j y A LIMITS OF v �`'�• TEMPORARY DIVERSION
/ ( \ \ \ \ DITCH (TYP.)
` f LIMITS OF GTIt DISTURBANCE SEE DETAIL 3/C502
DISTURBANCE
20' WIDE EMERGENCY ACCESS ROAD
CONTRACTOR TO INSTALL 8 INCHES
ABC STONE AND KEEP ALL \4
CONTOURS THE SAME 4 00
00
50' UNDISTURBED
TEMP. SEDIMENT BUFFER
�5B6 FENCE (TYP.)� / I /. A \
SEE DETAIL 2/C507 � � � 1 1 j \ ` LIMITS OF
\,DISTURBANC6 00
�;
I�
STONE OUTLET
SEE DETAIL 7/C502
SKIMMER BASIN #11/ w
S.D.O. #11 \ ` \ \ \ \ \ \ \ 7 00
p \ STONE OUTLET TYP. { _.
SEED 2 DETAIL 7/ 0 E
584
CONTRACTOR TO PROVIDE CURLEX I!
EXCELSIOR MATTING ACROSS THE
I 8 ,00
ENTIRE LENGTH & WIDTH 0 F ALL
' SLOPES 3H:1V AND STEEPERt � ! � f i /`; / /' _� \, ��\. �`\ ,,� ,� \ � °\� ` � �, �•, � � � `� � ,,�, A � � � ' �
Lij
/ /' per" ✓ = r r f DIISTURBANCE MITS OF\ \\ ~ \ y \\ \ f / �f / ( ` TEMP. SEDIMENT \,
FENCE SEE DETAIL 2/C501
9 Do
CONTRACTOR TO PROVIDE CURLEX I
( f SPILLWAY i
TAILING POND #2 ti EXCELSIOR MATTING ACROSS THE j
WE - 564' ,ENTIRE LENGTH & WIDTH OF ALL t ( \
{ ` \ BOTTOM 569' D STEEPER
l SLOPES 3H:1V AN
l
/ / 50' UNDISTURBED ( \ \ \
BUFFER
-
- 10 `00
to
110
TEMPORARY DIVERSION' \\ ""� ` \ \ ` �'"'�• ~�"� `� ` t
~• / 1 � l � DITCH (TYP.)
I SEE DETAIL 3/C502
SPILLWAY
SKIMMER BASIN #23/ �1. ` L
S.D.O. 2330�#110` 0
\ STONE OUTLET (TYP.) \ 0 30 490 120
\ l
SEE DETAIL 7/C502 1 \
0 19�� , I /
/ �.' CLASS 1RIPRAP
25'Lxl
s 4.5'Wx10.25'Lx14.75'W 27"
JJ TEMPORARY DIVERSION THICK WITH NCDOT TYPE
DITCH (TYP.) I -- \ \ \ ( SKIMMER BASIN #20/! f 2 FABRIC UNDERNEATH
S.D.O. #_20
I SEE DETAIL 3/C502
,
o I o \
Q
- I I , 139.73 LF
i1ER BASIN #9/"-,-._ i . � . __ °.:'.� ;'' .., r,, „r �� . ,r. ' ..r � \ n (� I� `
# \ \OF 1B" RCP
S.D.G. 9 _, 1�� � , .. �. �
- \
C301 B // � � \ O ITI � !w'N, / ' TEMP. SEDIMENT
F, FENCE C501
IMATCHUNE-SHEET_ �` '\ ` 1 -SHEET C301 D
SEE DETAIL 2/C501 \ M AT C H L I N E
'\ r FES 8 s •_��.,�
,
TONE INLET'
� j
J p \ PROTECTION
LIMITS OF � j , 1 :� , ,•. � '� : \ ;
DISTURBANCE R j
t
MINE HAUL ROAD ............... r,... r�._.....,._.7 , .., ..
0.3 LaBe
Powered by pars
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
I Z A. STIMQS�
F
T
I
© 2019 LaBella Associates
1 ►1
1; o 1
r1 Threatt,
DESCRIPTION:
I
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
7/22/19
DRAWING NAME
111=60'
SEDIMENTATION r.
EROSION 1 ' t
Pf
DRAWING NUMBER:

�f
50' UNDISTURBED
BUFFER
` ( I
\ j
\ `. �\
\I �
1 \
STONE OUTLET (TYP.)
SEE DETAIL 7/C502
\ \
\
50' UNDISTURBED
ED
BUFFER I
TEMPORARY DIVERSION
DITCH (TYP.)
SEE DETAIL 3/C502 f
/ FES 6
~
LIMITS OF
'
J INV.=628.00
DISTURBANCE
/
TEMPORARY DIVERSIOTypj
/
SEE
DITCH (C502
DETAIL 3/C502
I
SKIMMER
/
1 BASIN
!
^�
S.D.O. #19 $19f
f STONE OUTLET (TYP.)
SEE DETAIL 7/C502
i
I
1 I
3�
SPILLWAY (SEE
SHEET C302 FOR
7
SKIMMER DETAILS)
�
1`t
x
F
%A CARQ�-,,,,,
22052 =
T
I
© 2019 LaBella Associates
ALAMANCE
AGGREGATES, LU
Mr. Chad Threatt, VP
�=
NO: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
CONSTRUCTION
DATE:
7/18/19
1]aljyt allmr.
SEDIMENTATION &
EROSION CONTR°r
DRAWING NUMBER:

CONTRACTOR TO EXTEND TEMPORARY 64-~✓ ' --' r
SLOPE DRAINS AND RE -WORK - -
T TEMPORARY DIVERSIONS AND STONE f
INLET PROTECTION AS THE SKIMMER BASIN #2/ f TONE OUTLET
7/C502 )�
\ \ / - / J 9 \ { OVERBURDEN SOIL FILL HEIGHT S>Q S.D.O. 2
/ , / SKIMMER BASIN #16/ ' \ / __
-S.D.O. #16 ' INCREASES. 18" TEMP. SLOPE —
1\ e
1 DRAIN -- - TEMP. SEDIMENT
...........
.,. " �s� RAP SW_ / FENCE (TYP.) _
(50m Ynmfl�$�i Sx 9S5' ILRxP3' W 27" SEE DETAIL 2/C501
Y LEA l} R I /
STONE OUTLET NP.) IC.7-yP/cqL �' `-+�`I\�� T � `�., THICK WITH-NCDOTI � -- SPILLWAY
SEE DETAIL 7/C502 / / y\-' I - TYPE 2 NON WOVEN
570 572 �`. \ GEOTEXTILE FABRIC=
\ 562 #SKIMMER BASIN #1/ UNDERNEATH- er r
SPILLWAY /
CLASS I RIP RAP 3'W ` / f / 880 X
_X X-_x - x DRAIN
X �r'18" TEMP. SLOPE r ..,.,.
LEGEND
EXISTING PROPERTY LINE
-
PROPOSED PROPERTY LINE
--
EXISTING BUILDING
- -- --- -- —
,_1
PROPOSED BUILDING
MINE PERIMETER
PROPOSED SECURITY FENCE
—x—x—x—x—
TEMPORARY DIVERSION DITCH
TD >
TEMPORARY SILT FENCE
PROPOSED ENERGY DISSIPATOR
TEMPORARY CHECK DAM
s
MINE HAUL ROAD
DISTURBED AREA
IF
J
STONE OUTLET
p
TEMP. SLOPE DRAIN
STONE INLET PROTECTION
S.D.O.
STORM DRAINAGE OUTLET
Ilk o SPILLWAY s } % - x--___x- u _
1b "' �``. THICK WITH NCDOT
\ ' � TYPE 2 NON -WOVEN
GEOTEXTILE FABRIC
x�_ �-X �.'' ��. �.� �,,.. ` UNDERNEATH,..-- / 18" TEMP. SLOPE..
�x X / ( ! l I l l
/ TEMPORARY DIVERSION
DITCH (TYP.)
- I \ / r \ ' SEE DETAIL 3/C502
l
PROTECTION (TYP.) _ } 7 /
i DTS OF
IST RLIMIBANCE O �� 1
MENT
LIMITS OF
/ a DISTURBANCE
FENCE E
TEMP,
NCED(TYP) \
SEE DETAIL 2/C501 /
/ ,o'� fh ! � / � / I`
TEMPORARY DIVERSION LIMITS OF / / / r ✓ / / / / / /// / f' —
/ / ! DITCH (TYP.) 1 DISTURBANCE , / / S DI O ER#12ASIN #12/ ` / CLASS I RIP RAP
SEE DETAIL 3/C502 ' a f /
x9,5' Lx3'W27"
THICK WITH
/TYPE 2 NON -WOVEN
UNDERNEATH
FABRIC
\ UNDERNEATH
/-'`'F'/ / ./� 1 I �// / /' SPILLWAY / / / r ,,.- � / � STON
- ' l INLET
TEMP. SEDIMENT l l l / PROTECTION (TYP.)
FENCE (TYP.) ' / / \
/ �0r- SEE DETAIL 2/C501 `\_ \ STONE OUTLET (TYP.)
\ x 1 ' 18" TEMP. SLOPE SEE DETAIL 7/C502 _ `: �
DRAIN % SPILLWAY i
�� j / WELEVATION#1 (WE) - 594 610 �KDIMOME 3 ASIN #3/�
50' UNDISTURBED �/, FAILING
POND
f col BUFFER (� /' BOTTOM - 579' (DETAIL 4/C401)
` SKIMMER BASIN 28
' cs ;; / S.D.O. #28 �r \ 590 1
CONTRACTOR TO PLACE CURLEX I
EXCELSIOR MATTING ACROSS THE \ ` ., ' 50' UNDISTURBED
1 ENTIRE LENGTH AND WIDTH OF ALL - \
Yt� /� I \ / , SLOPES 3H:1V AND STEEPER. TEMPORARY DIVE ISR ON� BUFFER m
�: i / / / / / DITCH (TYP,)
�11SPILLWAY s / SEE DETAIL 3/C502
;_ � cg f .• , �.." \" \ y"'
90
�SyR IS
BE- ryyEENEAILING PO-ULATEDTEMP. SEDIMENT
6 \ I \ \ I r NDS 1&2. \ \ SKIMMER BASIN #29/ 1
\ FENCE (TYP.)
~ SEE DETAIL 2/C501
_ "to
�\
X V `�
/y
( I X 50 UNDISTURBED
BUFFER SKIMMER BASIN #9/ \ / /� / ✓ / _PERIM \
S.D.O. #9 � /'
7� `�/ / PERIMETER SECURITY
FENCE. CONTRACTOR
'SHALL NOT CUT TREES
WITHIN THE TOTAL 100
FOOT BUFFER WIDTH
AND MEANDER THE
SECURITY FENCE AS
1 I ! DISTURBANCE NEEDED.CyOjeGPL1' U
)94
3 15" TEMP. SLOPE SPILLWAY / /
/ 1 SKIMMER BASIN #11/ / �/ 0
Y 1 DRAIN �' / �a S.D.O. #11 / / f ✓ ^ _ '
I ?§' SKIMMER BASIN #13/. TAILING POND #2 L �4-
\ S.D.O. #13 WE - 584' ` / / / 1 / r
BOTTOM - 569 \ ! /
600
SPILLWAY
.70.�,�-^
\ _ 6 612 STONE INLET \ / 602 t PROTECTION (TYP.)
MATCHLINE
-SHEET C301 B \60, MATCHLINE-SHEET C301 C
/ - -- 6QQ
., a <'
s _M
o i
d
N y
M
� 30 0 30 60 90 120
I I I I I I
E N
r > P 60'
r
Lja3 LaBeRa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
,
22052
�C A. STIMe�'�.`.
i
i�„ Iu1zz�
T T T
L T
© 2019 LaBella Associates
ALAMANCE
AGGREGATES,
.1 Threatt, VP
Snow Camp Mine
1
1/20/20
ADDITIONAL STREAM INFO -ALAM. AGG.
& LAND QUALITY COMMENTS
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
1T:T:149N1C1a►1�G
1'TTdVNiT4iWLIe��:TI
mu

LEGEND
EXISTING PROPERTY LINE
- -
PROPOSED PROPERTY LINE
EXISTING BUILDING
,
L_J
PROPOSED BUILDING
MINE PERIMETER
PROPOSED SECURITY FENCE
—x—x—x—x—
TEMPORARY DIVERSION DITCH
TD>
TEMPORARY SILT FENCE
PROPOSED ENERGY DISSIPATOR
TEMPORARY CHECK DAM
v
MINE HAUL ROAD
DISTURBED AREA
r
STONE OUTLET
p
TEMP. SLOPE DRAIN
STONE INLET PROTECTION
m
O
i
1
w
I
r
h s,
Y f
r r r'
G
0'
I
-SHEET C301 CMATCHLINE
r E^
_
0 i / � ` � 1 `�"' .s / %�� i` „e-.r-.a-�-^^e^^!�r„-i 7',i,-.i,} v a•;• '�4'- �4�, i2 � �:'=r��S` Ms'§�c+'.�.f .'
��,,.....»,,,..., ` y ' / r .✓ f ; a .'gip ,- r �' yd ry aY x ...�». `5y.1-...'iu, �., _
t 4
/ ` ` ` 4} ,m,.. ,�-- .._.-_, ..._�...» - , ..: - __ . �.......� a �tr%2' \t. •°.i m", }" �:'.xiues� �"f3F ' i-`. - ,e�
j / 1
1
I TEMPORARY DIVERSION�� �• �� i ,r rr„, .%'" ....A>.g) ,''." ✓ / '
/ 0 JJJ DITCH (TYP.) ` J
/ - - SEE DETAIL 3/C502 50' UNDISTURBED
BUFFER '
/ \ �) \ f %r'/ ✓ -..__ _ r' " LIMITS OF
DISTURBANCE
r'
_ f
-
\ TEMP. SEDIMENT \ `
FENCE (TYP.) \ m
15" RCP
rl � a / / STONE OUTLET (TYP.)
SPILLWAY
FES 5
/ ,SKIMMER BASIN #24/
/ S.D.O. #24 _ \
STONE INLET �I
41 — -- PROTECTION
�6,3av
„
SKIMMER
BASIN #19/
` S.D.O. #19
FES 6
INV.=628.00
CLASS I RIPRAP
3.75'Wx10.5'Lx14.25'W 27"
THICK WITH NCDOT TYPE
2 FABRIC UNDERNEATH
LIMITS OF
DISTURBANCE
J
LnI
_�
,'TEMP. SEDIMENT
FENCE two)
SKIMMER BASIN #25/
MINE DEWATERING
S.D.O. #25`
50' UNDISTURBED
SPILLWAY ;✓ i BUFFER
STONE OUTLET (TYP.) ' fi
l l
CONTRACTOR TO PROVIDE CURLEX I
EXCELSIOR MATTING ACROSS THE -
ENTIRE LENGTH & WIDTH OF ALL
SLOPES 3HAV AND STEEPER s
f /
SKIMMER BASIN #27/
S.lD.O. #27
/ TEMPORARY DIVERSION
DITCH (TYP.) r / / SEOENE OUTLET DET IL 7/ 502)
/ — \ SPILLWAY SEE DETAIL 3/C502 /' r r' L
/ STONE OUTLET (TYP.) i
/ 1 I I /.I % MINE HAUL ROAD
SKIMMER BASIN #26/
S.D.O. #26 y _ /D V� ,� TEMP. SEDIMENT
� -'-' �,--_��S""
FENCE (TYP.) /
`
/ / �; A I Q � -.l ..� �^•. �'�,.,.„,�,� ,_.. ;• 30 0 30 60 90 120
/lit 60'
SPILLWAY
77
TEMP. SEDIMENT
/ f FENCE (TYP.) __ _.. ` _ .`.
/ STONE OUTLET (TYP.) __-- ,✓ ,�/
_--_ PB}2--- � / ` _ — � `�`�. -. Imo" . �_..-- "_.- __ -'" ,,,, '``� , � ,� / _ "" j / �/:/ /� /' � � •
STONE OUTLET TYP. -
q! ( ) CONTRACTOR TO PROVIDE CURLEX I /
EXCELSIOR MATTING ACROSS THE
m �
ENTIRE LENGTH & WIDTH OF ALL
% \ -- .•-"� �` SLOPES 3H:1V AND STEEPER
6 SKIMMER BASIN #7/
„_�I\'�-meµ �. ��� .J/ ^� _ _ __ - --- - ..�»» v\ �. �`� f / ��r � �_ ..•�
(
LaBeda
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
© 2019 LaBella Associates
ALAMANCE
AGGREGATES,I
Mr. Chad Threatit, VP
IS-01iff fill"
PROJECT NUMBER:
2190335
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
CONSTRUCTION
DATE:
7/18/19
DRAWING NAME:
DRAWING NUMBER:
111-601
=

.. 0- ONE OUTLET_ 7-
BOTTOM BASIN ELEVATION: 570.50 ,/'•-•i - - \�_ ---- -i
- WATERS EVELIELEVATION: 574.00 ^^''' ?I� ^ �'`'� SKfK4M R USFMPED MENT �- ./ "� STONE OUTLET TEMP
.TOP DAM ELEVATION: 575.50 ` ^,•,CLASS I"RIPRAP\ i �__-- (TYF•)SEDIMENT� �,y
LZI3 LaBeLLa
Powered by aartnershia.
-MIN SURFACE AREA'. 4640 SOFT �/' % -' �."� �,,,,,..Y,11,1`
_ CLASS I RIPRAP �i\. T ( 615 St. George
MIN VOLUME: 12647 CUFF �cf- STONE OUTLET / 50' BUFFER - - g Square
2'Wx6lx2 W' 21."'-+ \% _ 9 ^..
\ SKIMMER BASIN #2/ ORIFICE DIA: 1.5" `.•, \ fv / SKIMMER BASIN #3/ ---_(TYPO 8' WEIR �. l A6 �' Suite 300
S.D.O. #2 _THICK SKIMMER ` \ / S.D.O, #3 �- os % /� _ 0Win2
POROUS ____STONE -1, I 15' WEIR-sos_ .. 610 % CLASS l RIPRAP so 336S842 4065' NC 27103
BAFFLES OUTLET 2'Wx6'Lx2'W 21" /
\ _ ,TYP•) (Ty I X X-�X�X--x-x x x-,� SKIMMER BASIN #4/ THICK _
\ t � 570 x-x x-U-x x X _ s.D.POROUS abellapc.com
FLOA LNG Sg �I CLASS I RIPRAP r/ f
SKIM ER"""" SKIMM R "� SKIMMER BASIN #29/J 2'Wx6'Lx2'W 21" \ BAFFLES (TYP) soa _
/� s / S.D.O. #29 ( THICK r l f ✓ RG S
/_ \ / _.,....... 5 IR '"�' 7 _, '-�.` � - - - SKIMMER BASIN #4 •/ �'' FFL S
SKIMMER BASIN #2 BOTTOM BASIN ELEVATION: 604.50 �'' / P• t I I I I I I I
(BOTTOM BASIN ELEVATION: 567.50 .- --''� BARD E3 - ( �'" p WATER LEVEL ELEVATION: 608.00 r / ( ) .- \�N GAR7j77�ii
WATER LEVEL ELEVATION: 571,00 ��. ,_,_. _____ ._ _ TOP DAM ELEVATION: 609.50 r ,i r '( O�
TOP DAM ELEVATION: 572.50 \ ;/' / (TYP') ""^� -TOP OF DAM WIDTH: 5' �� �F` '�E.S '• ! i
TOP OF DAM WIDTH: 5' X - ---- - WEIR LENGTH: 8' ! f,,6' W611(� / •$• '1'• 'J
WEIR LENGTH: 5' ^,. \X c j '�'p MIN SURFACE AREA: 2652 SOFT ,/ / �M1 L _
MIN VOLUME 6767 CUFT
MIN SURFACE AREA: 1352 SOFT X _ 0
..---- i ORIFICE DIA 1 25'
MIN VOLUME: 3050 CUFF X
`''� SKIMMER' SKIMMER BASIN #5 �. �, 22052
ORIFICE DIA: 1" ( II,\ 1 / "`^'" 1 50' �` ._...-. ._.._.- __._ __._ _ SKIMMER SIZE: 2.0' _,_ „_,_ BOTTOM BASIN ELEVATION: 604.00
,\X\X --_ .... ._-__ ..._/-....._ I vp ......SKIMMER BASIN#9 _...,.--, 0 I OPTER DAMEVEL ELEVATON?fi09.007.50 i�,,.9�.........•¢p�\�
SKIMMER SIZE:2 1"=50' � ., __ _- ___ __ __...... � ,._ ---- - -� POROUS - - - SKIMMERBOTTOM BASTASIN ELEVATION: I N .
- `\\ \ ?� SKIMMER A''•. GINS'
N 6 13' WEIR POROUS \ 6 BASIN #5/ TOP OF DAM WIDTH: 5' i�i7U� A. STIMe�'��`�
BAFFLES WATER LEVEL ELEVATION: 596.50 S• • #5 // l
If \� - TYP TOP DAM ELEVATION: 598.50 DO I MIN SURFACE AREA:7872 SOFT
/ ILIA, 1
.--' X sos.o ` e / I ( \ ( ) MIN VOLUME: AREA:1 7 \
-- \ - - POROUS
- BAFFLES
TOP WEIR L DAM WIDTH: 5'
FFE ` �- CLASS I RIPRAP soae5 SKIMMER BASIN 9
fios.00 POROUS (NP - (TYP.) \ # / WEIR LENGTH:ID 1 ORIFICE DIA :438
�- - 2'Wx6'Lx2'W 21" S.D.O. #9 MIN SURFACE AREA:5940SOFT / SKIMMER
BAFFLES THICK -- _.-
(TYP.) I "` / r/�.. 1 � MIN VOLUME: 16034 CUFF
1
SKIMMER BASIN #6/ 6 0 e / II 3' TRAPEZOIDAL ,
h �,,�- \ /, f FLOATING ORIFICE DIA: 1.50" t"=50' ~~ \
S.D.O. #6 5� - "� _ 0 111 CHANNEL SKIMMER SIZE: 2.0" .i
87 SKIMMER��\ CLASS I RIPRAP - FLOATING
SKIMMER BASIN #7/ // / 0 \ ~ ~ 2'Wx6'Lx2'W 21"
SKIMMER
FLOATING #7 , s05.0o / \ 2'WxRIPRAP
Ix2CLASS1'W THICKPOROUS
60o,n - FLOATING ! SKIMMER _ g02 \
0� SKIMMER , X / 21" THICK ` h (TYP.)
- - -- WEIR
SEDIMENT /
- 5' WEIR -� .- _ TEMP I� / d- SKIMMER - Y \ \S9s % FENCE /
r
3KIMMER BASIN #6 STONE \ SKIMMER BASIN LE I FENS ( SKIMMER BASIN #8 1
30TTOM BASIN ELEVATION: 597.00 . OUTLET ,.•-� i BOTTOM BASIN ELEVATION. 600.50 /' " � % BOTTOM BASIN ELEVATION: 809.50 /
NATER LEVEL ELEVATION: 600,00 �--•� 1 ( WATER LEVEL ELEVATION: 6109 I / 6' SKIMMER BASIN 15 (TYP.) 1' 4- WATER LEVEL ELEVATIDN:604.00 5 STONE OUT ET ! STONE \ \ WEIR / S.D.O. #15
FOP DAM ELEVATION: 601.50 •.�- TOP DAM ELEVATION: 605.50 ..TOP DAM ELEVATION: 614.50 \ \
OP OF DAM WIDTH:5' CLASS I RIPR1 ITOPOFDAM WIDTH, .5' CLASS I RIPRAP (TYP.) ' - OUTLET /
NEIR LENGTH: 5' 2'Wx6'Lx2'W 21 _� TOP OF DAM WIDTH: 5' (//
I WEIR LENGTH:6' pC 2'Wx6'Lx2'W 21" / WEIR LENGTH: 13' / '�'\.. ! --'r (NP') SEDIMENT ' ( f' l ©2019 LaBella Associates
AN SURFACE AREA: 1460 SOPF .- THICK (MIN SURFACE AREA: 1914 SOFT THICK !!! ` \ '
�,,.-..,,x,,, MIN SURFACE AREA:450050FT f /" FENCE /
dIN VOLUME: 3123 CUFF r' i�'yII \ MIN VOLUME: 4600 CUFF ""^ `'�- f MIN VOLUME: 12426 CUFF _f-„_ „__„_,
)RIFICE DIA: 1.00 %/' - ."'-S, IBfE T `---.. `- \ ORIFICE DIA: i.75'Y --'." gSKIMMER BASIN #8/ --- - - - - -- ._.....----- ---........ _--r...:---- '
i ORIFICE DIA: 1,25" -^
3KIMMEfl SIZE:.1.5' l .a?9 !"_._._....... FENCE \_.._.-......--.._ SKIMMER SIZE: 1 5" f .._._ _____ _._.'._ SKIMMER SIZE: 2.0" S.D.O. #8 \
.-
SKIMMER BASIN POROUS I \ FLOATING v SKIMMER BASIN#72 \ STONE OUTLET �\
SKIMMER STONE \ CLASS I BOTTOM BASIN ELEVATION: CLASS I RIPRAP
#10/S.D.O. #10 \ BAFFLES (SKIMMER BASIN #17/ OUTLET RIPRAP 2'Wx6'lx2'W 21" (TYP.) \ 8 _ J
\, WATER LEVEL ELEVATION: 579.00 ALA ANC S.D.O. #11 ` (TYP.) 2'Wx6'Lx2'W ��
( \�' TOP DAM ELEVATION: 581.00 J THICK \ WEIR /
\ 4 0 CLASS I RIPRAP 21" THICK SKIMMER BASIN #12/ TOP OF DAM WIDTH: 5' % SKIMMER 13 SKIMMIRBRRIN 5 \ / 2'Wx6'Lx2'W 21" S.D.O. #12 WEIR LENGTH: 4' # / AGGREGATES, LLC
S.D.O. #13 BOTTOM BASIN ELEVATION 590.00
THICK \ \ MIN SURFACE 1712 AREA: SOFT \ % 60U' WATER LEVEL ELEVATION: 593.50
I --- MIN VOLUME: 1712 CUF7
ORIFICE DIA: 0.75 / \� / '� \ TOP DAM ELEVATION: 59550
SKIMMER SIZE:1.5" i"=50' FLOATING TOP WEIR LENAM GTH:
WIDTH:5' Mr. Chad Threatt VP
SKIMMER \ WEIR LENGTH 8:. �
�Op �"""'^- MIN SURFACE AREA: 7800 SOFT
90
MIN
`�.-----... ` \� \ \ Vll/lllf'�---� ORIFVOLD DIA:
CUFF
i 4' WEI 1 BAFFOLES /1__..
US
SKIMMER SIZE: 5.0"
SKIMMER BASIN #10
BOTTOM BASIN ELEVATION: 588.50 • ""'�
WATER LEVEL ELEVATION: 592.00 STONE •hOATING
TOP DAM ELEVATION:593.50 " SKIMMER SEDIMENT
TOP OF DAM WIDTH: 5' OUTLET I (.IYP FENCE
WEIR LENGTH: CLASS I RIPRAP /
MIN SURFACE AREA: CUFF
SOFT / : 2'Wx6'Lx2'W 21" --'
MIN VOLUME: CUFT I THICK
ORIFICE DIA: 1.00"
SKIMMER SIZE: 1.5"
POROUS BAFFLES
(TYP.) .
IASIN #20/L
S.D.O. #20 \
\ PCIRCUS / -SEDIMENTFENCE-7/
BAFFLES l ( CLASS I RIPRAP POROL
(nP) /� / BAFFLE
2'Wx6'Lx2'W 21 +
SKIMMER BASIN #16/ 1 % / / THICK / 8 8 (TYP,)
_ S.D.O./#16'
N WEIR / pp
WEIR /
�r I
CLASS I RIPRAP
2'Wx6'Lx2'W 21"
THICK /
I
o SKIMMER OAS
SKIMMER BASIN #16 n '+"
BOTTOM BASIN ELEVATION: 569.00 BOTTOM BASH
WATER LEVEL ELEVATION: 572.00 WATER LEVEL
TOP DAM ELEVATION: 574.00 /fjI TOP DAM ELE)
TOP Of DAM WIDTH: 5' -F` FLOATING TOP OF DAM V
WEIR LENGTH: 4' FLOATING / SKIMMER WEIR LENGTH
7 \.{( MIN SURFACE AREA: 4140 SOFT '-f•
MIN SURFACE 6405C CUFF STONE
SKIMMER 2'WX6'LX2'W 21 MIN SURFACE AREA: 2345 SOFT �\
MIN VOLUME: 6405 CUFT t STONE MIN ORIFICE
DIA:
CUFF THICK �" SKIMMER
1 , OUTLL-T /\ ORIFICE DIA: 1.50" MIN VOLUME: 4605 CUFT �..,`
ORIFICE E:2. `� - /\ SEDIMENT ` ORIFICE 1.25"
BASIN #19/
`0.Y_. AA`` 7Yp /`-' SKIMMER SIZE 3 0 _ - - 1 f=50' _I SKIMMER SIZE:20' t"=50'LN
~� #
SKIMMER SIZE: 2.0 1 50' / 1 -- -- ,- __ll ( ) __`- __ _ FENCE ------- ....__._.__ / S.D.O. 79
STONE SKIMMER BASIN #20 /'" SKIMMER BASIN #21 l /- / SKIMMER BASIN #22 ` _.`_-_...._._�.._..._�_.__.... ` _.._...__.._.._......_ ,^-_._.. _...�_., f CLASS I RIPRAP 1 SKIMMER BASIN #24
BOTTOM BASIN ELEVATION: 611.00 / .BOTTOM BASIN ELEVATION: 612.50 / SEDIMENT BOTTOM BASIN ELEVATION: 603.75 \ SEDIMENT \ \_ SKIMMER BASIN #23 �� SEDIMENT
OUTLET (TYP.)' - .} 5 FENCE \ BOTTOM BASIN ELEVATION: 602.00 1 2'Wx6'LX2'W BOTTOM BASIN ELEVATION: 620.00
WATER LEVEL ELEVATION: 614.00 WATER LEVEL ELEVATION: 615.50 FENCE WEIR WATER LEVEL ELEVATION: 606.75 t \\' \` / 21 " THICK FENCE WATER LEVEL ELEVATION: 624.00
/ TOP DAM ELEVATION: 615.50 / TOP DAM ELEVATION: 617.00 / TOP DAM ELEVATION: �8.25 31�!'�E OUTLL�' \ \ \ \ WATER LEVEL ELEVATION: 605.00 ` TOP DAM ELEVATION: 625.50
/ 1 / FLOATING \
T TOP DAM ELEVATION: 606.50 TOP OF DAM WIDTH: 5'
7 1, N. ,...-^ TOP Of DAM WIDTH: 5' • SKIMMER BASIN #22/ � TOP OF DAM WIDTH: 5' I (�`�-) ` \ \
TOP Of DAM WIDTH; 5' l`
WEIR LENGTH: 9' �I / i'" WEIR .WEIR LENGTH: 7' S.D.O. #22 WEIR LENGTH: 5' TOP OF DAM WIDTH: 5' �KIMMER l\ ` WEIR LENGTH: 18, ,
WEIR LENGTH: 1T
MIN SURFACE AREA: 3000 SOFT }�^ MIN SURFACE AREA: 2277 SOFT / MIN SURFACE AREA: 1568 SOFT J \� 1 MIN SURFACE AREA: 6100 SOFT
91 MIN VOLUME: 7074 CUFF MIN VOLUME: 5139 CUFF ` MIN VOLUME: 3336 CUFF / \ .MIN SURFACE AREA: 5616 SOFT. I MIN VOLUME: 15348 CUFF
WEIR ORIFICE DIA: 1.25' jii ORIFICE DIA: 1.25' � ORIFICE DIA: 1.00" slp MIN VOLUME: 14148 CUFF ORIFICE DIA: 1.75"
SKIMMER SIZE:20' 1"=50', SKIMMER SIZE: 2.0' 1"=50' I ST�OUTLE7 - SKIMMER SIZE: 15" 1"=50' � ORIFICE DIA: 1.50"
BAFFPOROLES j (TYP•) / 1T ~ SKIMMER SIZE: t \ `
\ SKIMMER SIZE: 3.0" t"=50'
CLASS I ' (TYP.) i spa WEIR' ! \ CLASS I RIPRAP \ /
�I
RIPRAP % r i CLASS I RIPRAP ` 2'Wx6'Lx2'W 21" \ \ \ -
2'Wx6'Lx2'W f 2'Wx6'LX2'w 21" / l
21" THICK / THICK / I THICK
f ` SKIMMER BASIN #24/
-FLO G S.D.O.s#24
Op
i
SKIMMER
/ I I SKIMFLOATING
ER
\ / I SEDIMENT \ \ -
1( POROUS
FENCE POROUS ` \ BAFFLES \\ e
BAFFLES / 6� _
FLOA N ' CLASS I - -L (TYP.) ` pt (TYP.) �T
3 \ SKIM ER FLOATING RIPRAP / l ` \ \ \ \ , POROUS otiA
o / f I SKIMMER BASIN \ STONE \
SEDIMENT ` SKIMMER #21/S.D.O. #21 2 Wz6 Lx2'W F OUTLET SKIMMER BASIN #23/� \ ` BAFFLES 18,
FENCE \ 21" THICK TYP:) - / r- \ S.D.O. #23 \ \ �. \ (TYP.) WEIR -
" SKIMMER BASIN #25 /� j �, __. ..... ...... _ _ ..--. r
a. / "`� 'SKIMMER BASIN #26 SKIMMER BASIN #27
o. BOTTOM BASIN ELEVATION: 630.30 / SKIMMER BASIN #26/� n
A WATER LEVEL ELEVATION: 633.30 / S.D.O. #26 BOTTOM BASIN ELEVATION: 614,00 SEDIMENT BOTTOM BASIN ELEVATION. 616.20 \ \ •X�,,,`/
WATER LEVEL ELEVATION: 617.00 I WATER' LEVEL ELEVATION: 619.20 \
3 TOP DAM ELEVATION: 634.80 / p`�(� - _ TOP DAM ELEVATION: 618.50 FENCE TOP DAM ELEVATION: 620.70
TOP OF DAM WIDTH: 5 /'r / 1 O STONE OUTLET ---_ "� TOP OF DAM WIDTH: 5' TOP OF DAM WIDTH. 5' , - ..SKIMMER BASIN #29/
WEIR LENGTH: 5' / \ S.D.O. #29 ^~' CLASS I RIPRAP
.�'( (n'P•) WEIR LENGTH: 18, / / WEIR LENGTH 8 SKIMMER BASIN #28/
a \a 2'Wxs'Lx2'W 21"
� MIN SURFACE AREA: 1475 SOFT ,,• �"�' � / '� �� _ .._. _�' ~� /1 / \ S.D.O. 28 '� "`--- .__; FLOATING THICK
MIN SURFACE AREA: 6201 SOFT MIN SURFACE AREA: 3060 SOFT #
MIN VOLUME: 3057 CUFF . % C� MIN VOLUME: 15687 CUFF / POROUS MIN VOLUME: 7092 CUFF \ h_. SKIMMER I i
m ORIFICE DIA: t' WEIR FLOATING ORIFICE DIA: 1,75' BAFFLES ORFICEDIA: 1.25'
Y SKIMMER SIZE: 1'=50' SKIMMER TYp• •�` f/
fSKIMMER SIZE: 3.0' 1"=50' ( ) / SKIMMER SIZE: 3.0 1"=50'
SKIMMER BASIN #25/ /! V`J / �� .,� POROUS I `'
�'� MINE DEWATERING ' rn / - FLOATING / / \ \ CLASS I RIPRAP POROUS BAFFLES
o S.D.O. #25 ? P SKIMMER \ \ OUTLET
A POROUS / 2'Wx6'Lx2'W 21" \ BAFFLES (TYP.) STONE
BAFFLES \ THICK FLOATING (TYP•) \
m si TYP• POROUS SKIMMER BASIN 27 / \ TYP.
# / - ( ) SKIMMER ( )
a �I --- - BAFFLES S.D.O. #27 \
n „�.-- WEIR .r /' i' �� -' \ (TYP.) ^. J SKIMMER BASIN #28 ` \\
�--"' / v / / \ \\ ` \ \ SKIMMER BASIN #29 '4 \
0 3 ���/ BOTTOM BASIN ELEVATION: 563.00 \ I BOTTOM BASIN ELEVATION: 579.50 4' WEIR \ I/� \
">D FLOATING \ \ \`
0 0 SKIMMER \ \ / WATER LEVEL ELEVATION: 586.00 ` \ WATER LEVEL ELEVATION: 583.00
M -•^' �..• 0� �'•I p / / TOP OELEVATION 587.50 STONE \ ` SEDIMENT TOP DAM ELEVATION: 584.50 \ \\ \
TOP OFF D DAM WIDTH: 5' OUTLET 5 WEIR FENCE 'TOP OF DAM WIDTH: 5' 586 \
f c WEIR LENGTH: 4' (TYp•) . _ .. _ WEIR LENGTH: 4' \
Eo, SEDIMENT
/ �^ '! CLASS IRIPRAP ""- \� U'. CLASS I RIPRAP MIN SURFACE AREA: 760 SOFT "��.,, `"-" MIN SURFACE AREA: 700 SOFT \ \ •.\ \
f= ,m, ! '� CLASS I RIPRAP \ SEDIMENT STONE 2'Wx6'Lx2'W 21" MIN VOLUME: 1380 CUFT "�' \ \ "``•: MIN. VOLUME: 1331 CUFF -
y r STONE OUTLET / 2'Wx6'Lx2'W
2t" 2'Wx6'Lx2'W 21"
FENCE' OUTLET r THICK ORIFICE DIA:1.25" �`�- \ \ \
- ( ) P. 8' WEIR ` SKIMMER SIZE: So" 1'=50' SKIMMER
DIA' E:2. SEDIMENT
THICK \` TY ) �.. 1.....� \ �`:... SKIMMERSIZE:2.0" FENCE
Snow Camp Mine
1 1/20/20 ADDITIONAL STREAM INFO - ALAM. AGG.
& LAND QUALITY COMMENTS
NO: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
DRAWING NAME:
SKIMMER BASIN
GRADING
DRAWING NUMBER:

3
0
c
�50 / 0 50 I50 �� 200 , / / ! / �~ "''^• �`
co
o
EXIST. RCP
/ p INV. (BURIED) 610.89 BOTH ENDS BURIED —
1 —7EXIST. 18" RCP
INV. 610.49 /
(BURIED) f, � INV. = 610.89
f / p SKIMMER BASIN #18/ �� I
f S.D.O. #18
i EX. EDP
ELEV. = 616.09
10' X 70'—
/ SIGHT TRIANGLE
ROCK PIPE
% INTLET ^— /
/ PROTECTION RCP
^ — —
..•-- � ' 80' OF 24
/ FES 1 62 0
INV. = 612.59
~� SKIMMER BASIN #17
/S.D.O #17 /
f h f
f
670
r-'r:3a]
650
630
620
610
590
580
570
"_. 6
12' WIN
10" ABC ONE
TYPICAL ENTRANCE ROAD SECTION
NIS
(TO BE HEAVY DUTY PAVEMENT
FROM CLARK RD. TO ST'A 18+94)
6' 30, 6' 6'
1.5" S 9.5 B
1• 1, FT ASPHALT Fr 1 /Fr
O RETAINING,
ifWALL
\ \\
o� 2 -4" AREA
BRIDGE CULVERT
1 TOP OF BANK
\ 606.00
KI MER BASIN #6,
,D.O. #6
I I d
10" ABC STONE 2.5' 1 19.0 B ASPHALT TMW e WAtiHED STONE TO BE USED
GRATE=63250 s ` �_ 1
/ INV.=630.25 \ 0 GRATE=629.20
INV.=627.00 � • / �
5' SIDEWALK WITH ADA
ACCESSIBLE RAMPS
126 90 LF } \ , ADA INS REQUIRED FOR
LaBeLLa
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Suite 300
Winston-Salem, NC 27103
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ALL HANDICAP SPOTS \
SKIMMER BASIN #27/
/ / I OF 15" RCP , \ 1 ` �\ \ \ I / S.D.O.
/
l
�
SKIMMER BASIN #26/
S.D.D. #26 /
(
—0+35+00 1+00 2+00 3+00 4+00 5+00 6+00 7+00 8+00 9+00 10+00
11+00 12+00
13+00 14+00 15+00 16+00 17+00
630
620
610'
600
590
580
18+00 18+94.45
50 0 50 100 150 200
HORIZONTAL 1" = 100'
VERTICAL 1" = 10'
LANC
AGGREGATES, LL
Mr. Chad Threatt, VP
Snow Camp Mine
1 1/20/20 ADDITIONAL STREAM INFO - ALAM. AGG.
& LAND QUALITY COMMENTS
N0: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
DRAWING NAME
DRAWING NUMBER:

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SK29 AREA ) �I \ I �`" 1 � J
SK2 f 0.73 .Ac �) I OR ON OF \ t
AREA pp { ! f//
SK3 AREA = PID: 102n�s \ • ` 60 _
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SK12 AREA
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P D: 102A j
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/ \ 1 \� r f //� -. f / (/ P ,02770
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3.45 Ac _-
'u'_ SF` %1,"ID:102'�67
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� = 1.69 Ac � � '� � � �i a� I � � � �
_ _ ._ _ - — ,� Z5&jD: 02766
SK 19 AREA i t - = ^ __ _- O r RO AND TI NYA B. VEtATZ iEY
SK8 AREA -_ SK27 AR = \ l \ = 4.34 �Ac f 1 yF ------
:A = /
4.86 AC 3.33 Ac PID ?oz ss� ., v ,- - •� ///� _ ," �-
II�v�vvA
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, 1 -$K7 AREA $K26 AREA = r'' / �� \ ` \ \// 10 r J/l r
\� \ \ ` \!Q u _ 6.79 Ac , 0 AC
SK25 AREA = /f/ \ OPF-- HO SE
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ON
SK10 AREA >� - ® _ - / \
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14 SK 5 AREA
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SK 15 AREA
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125 0 125 250 375 500,
V = 250'
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
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22052 •`
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© 2019 LaBelle Associates
a i
1 • � i
NO: DATE: DESCRIPTION:
(REVISIONS
PROJECT NUMBER:
DRAWN BY:
REVIEWED BY:
ISSUED FOR:
DATE:
DRAWING NAME
DRAWING NUMBER:
2190335
KCG/ATC
PAS
CONSTRUCTION
7/18/19
Ua
tnership,

k\ SKIMMER BASIN #18/_
\ k\ S.D.O. #18
� k
\ \ \X\ INV. = 610.89
EXIST.~12" RCP k\k
BOTH ENDS BUR\ ��— w ^\ \kY
\.
INV. = 610.89
(BURIED) \
FES 2
INV. = 611.79
EXIST. 18 RCP CLASS I RIPRAP
6'Wx14'Lx2O'W 27" THICK
WITH NCDOT TYPE 2
FABRIC UNDERNEATH -0
f INV. = 610.49
(BURIED)
/R20'
r-
r,.
EX. EDP
ELEV. 616.09
r
20 0 zo 40 60 so \
V=40' �\
630
i�
610
E>
Ali
IST.
S
ROD
6-1-6
A.
0-1
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P
4.2
—
--
RO
. R
AD
C/I.
TETA.
—0i
18.
4
--
tT9
4"
NV.
RC
=
11.
1
LEV.
=
61
3.26
O
Ob
M
to
I
IN
M
q
r
N
fD
d'
n
(0
0)
N
O
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Cq
t0
f0
t0
U)
c0
t0
U1
—0+35 0+00
20 0 20 40 60 BO
f I I I I I
1" = 40'
HORIZONTAL 1" = 40'
VERTICAL V = 4'
2
1
Lz13 LaBe
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615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
IBUSH RD labellapc.com
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80' OF 24" RCP/
�k\ i 'INV. 612.59�
\k
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10' X 70' PROTECTION O'
SIGHT TRIANGLE `
630
r_j;Z&wJ
610
. I •
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N
1+00 2+00
72' MIN
10' ABC STONE
TYPICAL ENTRANCE ROAD SECTION
NIS
(TO BE HEAVY DLTTY PAVEMENT
FROM CLARK RD. TO STA 18+94)
— 30' 66'
1.5" S 9.5 B
ASPHALT
1 %Fr
3
—10" ABC STONE 2.5" 1 19.0 C ASPHALT
FIELD SURVEY INFORMATION OBTAINED FROM ALAMANCE AGGREGATES ON JAN. 9 2018
EXISTING GROUND PROFILE AT CLARK ROAD AND WETLAND POINTS OBTAINED FROM
ALAMANCE AGGREGATE ON AUGUST 9, 2018
ALL OTHER TOPOGRAPHY' OBTAINED FROM GIS
�`1�111uiiirrrrr T
i A'�'VGINE.
�.qG�.i.•. STIS
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© 2019 LaBella Associates
ti 1' ,111
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1
7/19/19
OWNER/NCDEMLR COMMENTS
N0:
DATE:
DESCRIPTION:
REVISIONS
�
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE: 10/24/18
DRAWING NAME:
DRAWING NUMBER:

I
ti
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41
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FOUNDATION
y
.
BY OTHERS
4
.
Y
24'-0" ARCH SPAN
i
HEADWALL
BY OTHERS
BRIDGE PLAN
T/GRADE
3'-
CROSS SECTION A -A
PROTECT WEIR WITH FILTER
FABRIC AND RIPRAP
NOTES:
• MEASUREMENTS ARE TO THE INSIDE
CRESTS OF THE CORRUGATION
• DIMENSIONS ARE SUBJECT TO
MANUFACTURING TOLERANCES
*PRELIMINARY FOUNDATION DESIGN NOTES:
• PRELIMINARY SIZING BASED ON
ASSUMED 8000 PSF BEARING CAPACITY,
4'-1" OF COVER, AND CAT 773 LIVE
LOADING
• SCOUR NOT CONSIDERED IN THIS
PRELIMINARY DESIGN
• FINAL DESIGN MAY VARY
CONTECH METAL ARCH BRIDGE CULVERT
NTS
1 I
ROPE
12'
7f`FILTER FABRIC
ref
----------------
i �j.,y iiiES��iI llli 11 IL�311:1 Ftll'lI11�I1F"�II II IIiWll�,lf"`�I
c_
NOTES i
1. USE FOR DRAINAGE AREAS NOT EXCEEDIN FIVE
2. EARTH BERM SHALL HE STABIUZED Wq'SEEDING ACCORDING
TOWN SPECIFICATIONS.
DESIGN OF
SPILLWAYS
DRAINAGE AREA
WEIR LENGTH 1
(ACRES)
(FT)
1
4.0
2
6.0
3
8.0
4
10.0
5
12.0
1DIMENSIONS SHOWN ARE MINIMUM
FILTER FABRIC
BAFFLES WITH METAL T—POST,
WOVEN WIRE FABRIC BACKING
AND COIR FIBER NETTING
I
LENGTH
SKIMMER BASIN CROSS SECTION
i UNE WEIR WITH RIPRAP
WEIR CROSS SECTION
DITCH AND BURY
FILTER FABRIC EDGE
(MIN. 12' OF FABRIC)
MAINTENANCE
• INSPECT TEMPORARY SKIMMER BASIN AND EMPTY SKIMMER OF ALL DEBRIS AFTER EACH PERIOD OF SIGNIFICANT RAINFALL. REMOVE
SEDIMENT AND RESTORE BASIN TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN
DEPTH OF THE BASIN. PLACE THE SEDIMENT THAT IS REMOVED IN A DESIGNATED DISPOSAL AREA. REPAIR BAFFLES.
• CHECK THE STRUCTURE FOR DAMAGE FROM EROSION OR PIPING. PERIODICALLY CHECK THE DEPTH OF THE SPILLWAY TO ENSURE IT
IS A MINIMUM OF 1.5 FEET BELOW THE LOW POINT OF THE EMBANKMENT. IMMEDIATELY FILL ANY SETTLEMENT OF THE EMBANKMENT
TO SUGHTLY ABOVE DESIGN GRADE. ANY RIPRAP DISPLACED FROM THE SPILLWAY MUST BE REPLACED IMMEDIATELY.
• STABILIZE THE EMBANKMENT AND ALL DISTURBED AREAS ABOVE THE SEDIMENT POOL AND DOWNSTREAM FROM THE BASIN IMMEDIATELY
AFTER CONSTRUCTION WITH SEEDING AND MATTING, AS NEEDED.
z:) TEMPORARY SKIMMER BASIN (2 OF
IN J NTS
NOTE:
THE SETTLING PONDS WILL BE REMOVED WHEN THE
RECLAMATION PLAN IS COMPLETED IN THE FIELD.
1GO' WIDTH
1�
TOP OF BERM
WATER SURFACE ELEVATION m 595 FT
ELEVATION = 594 FT
TAILING POND F1
10 too' utDm
I I TOP OF BERM
ELE 01 591 FT
t- WATER SURFACE _n
2. ti T
BOTTOM
ELEVATION
TAIUNG POND J2
NME
EACH TATUNG POND SHALL HAVE A MINIMUM FREEBOARD OF
1.0 FEET AND SHALL HAVE DIMENSIONS AT THE SURFACE OF
500 FEET LONG BY 100 FEET WIDE.
THE SLOPES OF THE OUTER SIDES OF THE TAIUNG PONDS
WILL VARY DEPENDING ON THE SURROUNDING SURFACE.
TAILING POND DETAIL
MS
BAFFLES WITH METAL T-POST, WOVEN WIRE
FABRIC BACKING AND COIR FIBER NETTING -
SEE BAFFLE DETAIL
(THIS SHEET)
BOTTOM ANCHORED
WITH STAPLES
SKIMMER WITH RETRIEVAL ROPE
TOP OF
DAM 5'-0*,
STONE APRON
WITH FILTER FABRIC
PERSPECTIVE VIEW
1 ) TEMPORARY SKIMMER BASIN (1 OF
401j NTS
J TOTES
1. SKIMMER IS TO BE A SURFACE DEWATERING DEVICE
SUCH AS BMP SKIMMER OR APPROVED DEVICE.
2. SKIMMER SHOULD RISE TO LEVEL OF WEIR HEIGHT IN
TEMPORARY BASIN OR TO RISER INLET.
3. ROPE ATTACHED TO SKIMMER TO HELP KEEP CLEAN.
4. SIZING OF ORIFICE TO ALLOW FOR DEWATERING TIME
OF 24-72 HOURS.
SCHEDULE
RIGID FLEXIBLE JOINT
OUTLET END: CONNECTION
TO OUTLET PIPE OR RISER —
E
�O
)PE I L
NOT INCLUDED WITH SKIMMER SUPPLIED BY USER.
I
© 2019 LaBelia Associates
ALAMANCE
AGGREGATES, LU
SKIMMER DETAIL Mr. Chad Threatt, VP
NTS
N=.
1. DRIVE STEEL FENCE POST AT LEAST 18
INCHES INTO SOLID GROUND.
2. WOOD POST ARE NOT ACCEPTABLE,
3. DIRECT WATER TO TOP OF BASIN USING
STABILIZED DITCH, SLOPE DRAIN PIPE
OR OTHER APPROVED METHOD.
BAFFLE DETAIL
CORR FIBER MATTING.
SECURE WITH NYLON
ZIP TES.
36"
ZIP TIES -
FLOW DIRECTION STAPLES
WOVEN WIRE FABRIC.
SECURE WITH NYLON ZIP
T-POST
I
I
_
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
7/18/19
DRAWING NAME:

Channel
Description
Number
1
FES 2 to STA. 6+50
2
FES 1 to Sta. 6+50
3
West Side Access Road Sta, 7+00 to 14+00
4
East Side Access Road Sta. 8+50to 14+00
5
Access Road (West Side) Sta. 18+50to SK 6
6
SK 8to Stream Buffer
7
Exist. 18" RCP to FES 2
8 5(('
6 Ito Sta. 20+00
9
SK 7 to Sta. 20+00
r__
3 TIMES INNER
DIAMETER (I.D.)
Side Slope
Bottom Width
Discharge
Bottom Stabilization
Side Stabilization
Max. Bed Slope
(H:V)
(ft)
Ids)
Method
Method
2.90%
3:1
2
7.05
Curlex I
Curlex 1
2.96%
3:1
2
12.66
Curlex I
Curlex 1
4.10%
3:1
2
3.5
Curlex I
Curlex 1
3.63%
3:1
2
5.12
Curlex I
Curlex 1
11.25%
3:1
2
4.55
Curlex III
Curlex III
6.93%
2:1
3
13.64
Curlex III
Curlex III
1.00%
2:1
1
20.59
Curlex I
Curlex 1
3.25%
2:1
2
4.55
Curlex I
Curlex 1
3.50%
2:1
2
5.81
Curlex I
Curlex I
CHANNEL STABILIZATION SCHEDULE
NTS
117190=1011
NOTES:
1) Li = LENGTH OF THE RIPRAP APRON.
2) L2 = RIPRAP TO BE INSTALLED UNDERNEATH 1/3 THE LENGTH
OF FLARED END SECTION (FES).
3) d = 1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT LESS
THAN 18 INCHES.
4) A FILTER BLANKET OR FILTER FABRIC MUST BE INSTALLED
BETWEEN THE RIPRAP AND SOIL FOUNDATION (NCDOT TYPE 2).
PIPE OUTLET TO FLAT AREA NO WELL-DEFINED CHANNEL
117q.C•17i49I79:'
Lt
SECTION 'A -A'
PIPE OUTLET TO WELL-DEFINED CHANNEL
NTS C 402 NTS
TRENCH
GRADE WIDTH
I
1 ^ UTILITY
LINE
(DIAMETER
VARIES)
—ANTI—SEEP COLLAR
n a
a d
ANTI -SEEP COLLAR, 12^
CLASS B CONCRETE
SECTION A —A
ANTI -SEEP COLLAR
NTS
m
NOTES:
1) Lt = LENGTH OF THE RIPRAP APRON.
2) L2 = RIPRAP TO BE INSTALLED UNDERNEATH 1/3 THE LENGTH
OF FLARED END SECTION (FES).
3) d = 1.5 TIMES THE MAXIMUM STONE DIAMETER BUT NOT
LESS THAN 6 INCHES.
4) IN A WELL—DEFINED CHANNEL EXTEND THE APRON UP THE
CHANNEL BANKS TO AN ELEVATION OF 18 INCHES ABOVE THE
MAXIMUM TAILWATER DEPTH OR TO THE TOP OF THE BANK,
WHICHEVER IS LESS.
5) A FILTER BLANKET OR FILTER FABRIC MUST BE INSTALLED
BETWEEN THE RIPRAP AND SOIL FOUNDATION (NCDOT TYPE 2).
1112A 7CN
y LaBeLL;�
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© 2019 LaBeta Associates
AGGREGATES, LL
t Threatt, VP
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
7/18/19
DRAWING NAME:
DRAWING NUMBER:

M
HI -VISIBILITY CROSSWALK
STANDARD CROSSWALK
z
D H O'a
STOPBAR
Z~ Y U
H 7
HZ1 >
C,C x,
Z x000
SIDEWALK
4' MIN.
B' MIN.
B" WHITE
<
H x Z
0 0 iy
0 9
-DETECTABLE WARNING
TO
CROSSWALK
PEDESTRIAN
CROSSWALK
CROSSWALK LINES
W
0 W 0 -1
CC O<
x Z
' gyD
DOME$
z :Dig
9 DH
%
4' MIN. EDGE OF TRAVEL
N >
0 '
TO CROSSWALK LINE
W 0
z
_-CURB RAMP
o"oo"o
SIDEWALK
I �
ITT
4' % 4' 24" WHITE
CLEAR SPACE
Z
CROSSWALK LINE
CD
24" GAP
CURB RAMPS
LLLU) Y
ITT1-
7
M< x
H Z d
-M-I 3
oc N
m Z
Z
z
CLEAR SPACE
0 0
0
) D
U
cc
9
O> O
10' MIN. WIDTH
Z Z <
O<
IJU
z
1- THE MINIMUM WIDTH OF STANDARD CROSSWALKS IS 6 FEET, THE MINIMUM WIDTH OF HI -VISIBILITY CROSSWALKS IS 10 FEET.
LEGEND
H < W
G)
®" 0-
O
2- SET BACK DISTANCE FROM INSIDE CROSSWALK MARKING TO NEAREST EDGE OF TRAVEL IS 4' MIN.
•
DIRECTION OF
0
3- BEYOND THE CURB FACE, A CLEAR SPACE OF 4' X 4' FEET MINIMUM SHALL BE PROVIDED WITHIN THE WIDTH OF THE CROSSWALK.
•
TRAFFIC FLOW
CURB RAMP WITH
Z
W
,i
Y \
DETECTABLE
4- PLACE STOP BARS A MINIMUM OF 4 FEET FROM NEAREST CROSSWALK LINE. STOP BARS AT SIGNALIZED INTERSECTIONS SHOULD
WARNING DOMES
BE COORDINATED WITH THE SIGNAL DESIGN SECTION OR AS DIRECTED BY THE ENGINEER,
5- CURB RAMPS SHALL BE CONSTRUCTED IN ACCORDANCE TO THE LATEST NCDOT ROADWAY STANDARD DRAWINGS.
HEFT i OF 1
SHEET 1 OF 1
1205.07
1205.07
CROSSWALK DETAIL
NTS
16' WIDE 2:1 SLOPE - I 8 16 IDE 2:1Al SLOPE P 8' HIGH Al TOP
NTS
MINE SIDE
18' BERM TOP
ROAD/ADJACENT SIDE
GENERAL NOTES:
-; 1.
A GROOVE JOINT 1" DEEP WITH 1/8" RADII SHALL BE REQUIRED IN THE CONCRETE
SIDEWALK AT 5' INTERVALS. ONE 1/2" EXPANSION JOINT WILL BE REQUIRED AT
°
INTERVALS OF NOT MORE THAN 45' AND MATCHING EXPANSION/CONSTRUCTION JOINT IN
ADJACENT CURB. A SEALED 1/2" EXPANSION JOINT WILL BE REQUIRED WHERE THE
g` :.
SIDEWALK JOINS ANY RIGID STRUCTURE.
'4 •' :.A 1, 2.
SIDEWALK AT DRIVEWAY ENTRANCES TO BE 6" THICK.
3.
WIDTH OF SIDEWALK ON THOROUGHFARE STREETS SHALL BE A MINIMUM OF 6'. WIDTH
OF SIDEWALKS IN THE CENTRAL BUSINESS DISTRICT WILL BE DETERMINED BY THE CDOT.
p r •: 4 1 • ' 4.
WIDTH OF SIDEWALKS ON NON —THOROUGHFARE STREETS SHALL BE BASED ON TYPICAL
STREET SECTION, A MINIMUM OF 5'. SIDEWALK TO BE POURED TO END OF RADIUS AT
INTERSECTING STREETS.
GROOVE JOINT IN SIDEWALK 5.
CONCRETE COMPRESSIVE STRENGTH SHALL BE 3600 PSI. IN 28 DAYS.
6.
ZONING CONDITIONS MAY REQUIRE ADDITIONAL WIDTH SIDEWALKS WHICH SHALL
SUPERSEDE THESE STANDARD DIMENSIONS SHOWN.
7.
LIDS FOR JUNCTION BOXES AND UTILITY VAULTS SHALL BE NON—SKID AS SPECIFIED BY
ENGINEER.
8.
JOINT MATERIALS SHALL LIMIT SHRINK/SWELL SO POST CONSTRUCTION INSTALLATION
1/8" RADIUS -----�
RESULTS IN A MAXIMUM OF 1/4" FROM FLUSH.
\ \
�— JOINT FILLER
---- 1/2'
-----ffFF���•----
TRANSVERSE EXPANSION
JOINT IN SIDEWALK
-1/2" EXPANSION JOINT
1.50% (2.00% MAX.)
EXAMPLE SIDEWALK CONSTRUCTION DIMENSIONS:
WIDTH
EM
CROSS —SLOPE
1.56%
4'
1"
5'
1"
1,67%
6'
1-A"
1.56%
8'
1-4"
1.56%
' 1 CURB & GUTTER
PROPOSED 4" CONCRETE SIDEWALK
DETAILS SHOWING EXPANSION JOINTS
IN CONCRETE SIDEWALK
SIDEWALK DETAIL
NTS
NOTES:
LARGE TREES SHALL BE 2" CALIPER AND 12' HEIGHT H
AT PLANING, BALLED AND BURLAP. TREES SHALL BE DOUBLE -STAGGERED WITH 8-10' CENTERS
SEED THE ENTIRE BERM AFTER TREE AND SHRUB PLANING WITH PANICUM VIRGATUM, SWITCH
GRASS, AT A RATE OF 8 LBS/ACRE DO NOT MOW.
SEE TABLE BELOW FOR ALLOWABLE TREES AND SHRUBS.
LARGE TREE�
Scientific Name Common Name
Pinos Taeda LoBlolly Pine '..
2.5'
8
2.0
PARKING SPACE PAVEMENT MARKINGS
SIGNAGE-- -® (a) ® (B)
(MUST NOT OBSTRUCT
ACCESSIBLE ROUTE) ACCESSIBLE ROUTE
(SEE NOTE 2)
AS SHOWN
ON PLANS
J
c(
IF
0
104.0,0"
r
:
2% MAX. SLOPE IN ANY
DIRECTION ACROSS THE
PARKING/UNLOADING SPACES.
NOTE:
ONE OUT OF EVERY
SIX (6) ACCESSIBLE
SPACES, BUT NOT
- -
- -
- - - - - LESS THAN ONE, IS
REQUIRED TO BE VAN
ACCESSIBLE, PER
VAN
VAN
SECTION 1 OF
ACCESSIBLE
ACCESSIBLE
BUILD
NC STATE BUILDING
SPACE
(OPTION 1)
SPACE
(OPTION 2)
CODE
o
MUTCD
AN
[[AXESSIBLE
R7-8P
12"x6"
No
MUFCD
RESERVED
R7-1
PARKING
1z"xi8"
PARKING
RMUTCD
R7-8
7-8
RESERVED
12"x,8"
PARKING
MUTCD-ANY
®
TIME
12"x18•
OPTIONAL
MAXIMUM
ACCESIBLE
PENALTY
CLDSM 50.10C
LOADING
$250
12"x9"
ZONE SIGN
MAXIMUM
PENALTY
CLDSMLDSM 50.10C
$250
SEE STANDARD NO. 50.10C FOR
SUPPLEMETAL SIGN DETAIL
NOTES;
1. ALL 12"x18" ACCESSIBLE SIGNS SHALL BE MOUNTED AT 7 FEET FROM GRADE
TO BOTTOM EDGE OF SIGN FACE (MUTCD). MOUNTING HEIGHT CAN BE REDUCED
TO 5 FEET IF PLACED IN AN AREA BETWEEN SIDEWALK AND BUILDING FACE IN
WHICH PEDESTRIANS ARE NOT EXPECTED TO USE.
2. IF ACCESSIBLE ROUTE IS A RAISED SIDEWALK AREA, THEN RAMPS ARE REQUIRED
AT LOADING ZONE AREA, MAINTAIN MIN. 4' WIDE CONTINUOUS PASSAGE.
3. VERTICAL CLEARANCE FOR VANS MUST BE GREATER THAN 98-INCHES.
4. THIS DETAIL IS TO PROVIDE GENERAL GUIDANCE FOR PARKING LAYOUT AND
DESIGN; REFER TO MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (MUTCD)
U.S. DEPARTMENT OF TRANSPORTATION AND NORTH CAROLINADEPARTMENT OF
TRANSPORTATION SUPPLEMENT AND NO BUILDING CODE FOR ADDITIONAL
INFORMATION.
ACCESSIBLE PARKING AND SIGNAGE DETAILS
NTS
30.0'
12" CRUSHER RUN OR
CABC STONE
HAUL ROAD TYP. SECTION
NTS
In' - "T" P(15T
PULL POST
ASSEMBLY g" DIA.
1100' INCREMENT?
STABILIZE ROAD SIDE. DITCHES
WITH 8' WIDTH CURLEX III NIGH
VELOCITY MATTING OR
APPROVED EQUIVALENT.
FIXED KNOTTED WIRE FENCING PERIMETER FENCE DETAIL
NTS
SWALE
2'
4' MIN
F
SINGLE STRAND
/BARBED WIRE
,10' - "T" POST
LaBq1.._.
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S?nMTx`Ydt3i, Powered by part
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Winston-Salem,
• i •
labellapc.com
T
.�`0µ CARo,,,�� I
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22052
A. tcNGINEEC�,:C�
if if 11
C 2019 LaBeIIa Associates
i
ALAMANCE
AGGREGATES, LUI Threatt, VP
NO: DATE: DESCRIPTION:
REVISIONS __ _ _�
PROJECT NUMBER:
2190335
DRAWN BY:
RFVIFWFn BY.
KCG/ATC
ISSUED FOR:
CONSTRUCTION
DRAWING NAME:
DRAWING NUMBER:
//10/1`.9

s
Powered by pa,'
RIc,NAxOROF fl04MR5t R OF PROTX"CAMIILCH
pnCCfI0N 0l R�'NAxO WEfliN(I'POIICIM 1.tIncN
NWnuv
�awig—
RRT'rs avAxc0."",
ANO R'FFAF"C: A DRA"ORT'lilx
A 6INGHTIFERCH.
INSTALLATION OF NETTING AND MATTING:
PRODUCTS DESIGNED TO CONTROL EROSION SHOULD BE INSTALLED
IN ACCORDANCE WITH MANUFACTURER'S INSTRUCTIONS. ANY MAT
OF BLANKET -TYPE PRODUCT USED AS A PROTECTIVE MULCH SHDULD
PROVDE COVER OF AT LEAST 30%OF THE SURFACE WHERE IT IS APPLIED,
I. APPLY FIVE, FERTILIZER AND SEED BEFORE LAYING THE NET OR MAT.
IF OPEN -WEAVE NETTING IS USED, TIME MAY BE INCORPORATED BEFORE
INSTALLING THE NET AND FERTILIZER AND SEED SPRAYED ON AFTERWARD.
2, START LAYING THE NET FROM THE TOP OF THE CHANNEL OR SLOPE AND
UNROLL IT DOWN THE GRADE. ALLOW NETTING TO LAY LOOSELY ON THE
SOIL BUT WITHOUT WRINKLES-00 NOT STRETCH.
3, TO SECURE THE NET, BURY 111E RESULTED END IN A SLOT OR TRENCH NO LESS
THAN 6-INCHES DEEP COVER MEET SOIL AND TAMP FIRMLY AS SHOWN IN
THIS DETAIL, STAPLE TFIE NET EVERY I2.-INCHES ACROSS THE TOP END AND
AN EVERY 3 FEET AROUND THE EDGES AND BOTTOM. WHERE 2 STRIPS OF
NET ARE LAID SIDE BY SIDE, THE ADJACENT EDGES SHOULD BE OVERLAPPED
34NCIEM STAPLED TOGETHER. EACH STRIP OF NETTING SHOULD ALSO BE
STAPLED DOWN THE CENTER, EVERY 3 FT. DO NOT STRETCH THE NET WHEN
APPLYING STAPLES.
MAINTENANCE:
INSPECT ALL MULCHES PERIODICALLY, AND AFTER RAINSTORMS TO CHECK
FOR RILL EROSION, DISLOCATION, OR FAILURE. WHERE EROSION IS OBSERVED,
APPLY ADDITIONAL MULCH. IF WASHOUT OCCURS, REPAIR TFIE SLOPE GRADE,
RESEED, AND REINSTALL MULCH. CONTINUE INSPECTIONS UNTIL VEGETATION
IS FIRMLY ESTABLISHED.
B ,CHANNEL PROTECTION
C501 %
HOER
FABRIC
WASHED STONE
(iP TOP LAYER)
CLASS B EROSION
CONTROL STONE
SECTIONA-A
CONSTRUCTION SPECIFICATIONS:
1. PLACE STONE TO THE LINES AND DIMENSIONS SHOWN IN THE PLAN ON A FILTER
FABRIC FOUNDATION
2. KEEP THE CENTER STONE SECTION AT LEAST 9 INCHES BELOW NATURAL GROUND
LEVEL WHERE THE DATA ABUTS THE CHANNEL BANKS.
3, EXTEND STONE AT LEAST I,5-F BEYOND THE DITCH BANKS TO KEEP OVERFLOW
WATER FROM UNDERCUTTING THE MM AS IT RE-ENTERS THE CHANNEL.
4, SET SPACING BETWEEN DAMS TO ASSURE THAT THE ELEVATION A7 THE TOP OF THE
LOWER DAM IS THE SAME AS THE TOE ELEVATION OF 711E UPPER DAM.
5, PROTECT THE CHANNEL DOWNSTREAM FROM THE LOWEST CHECK DAM,
CONSIDERING THAT WATER WILL FLOW OVER AND AROUND THE DAM.
6, MAKE SURE THAT THE CHANNEL REACT{ ABOVE THE MOST UPSTREAM DAM
IS STABLE.
7, ENSURE THAT CHANNEL APPURTERANCES, SUCH AS CULVERT ENTRANCES BELOW
CHECK DAMS, ARE NOT SUBJECT TO DAMAGE OR BLOCKAGE FROM DISPLACED
STONES,
MAINTENANCE:
1. INSPECT CHECK DAMS AND CHANNELS FOR DAMAGE AFTER EACH RUNOFF
EVENT.
2. ANTICIPATE SUBMERGENCE AND DEPOSITION ABOVE THE CHECK DAM AND
EROSION FROM FLOWS AROUND THE EDGES OF THE DAM. CORRECT ALL
DAMAGE IMMEDIATELY, IF SIGNIFICANT EROSION OCCURS BETWEEN DANIS,
DEAL A PROTECTIVE RIPRAP LINER IN THAT PORTION OF THE CHANNEL.
3, REMOVE SEDIMENT ACCUMULATED BEHIND THE DAMS AS NEEDED TO PREVENT
DAMAGE TO CHANNEL VEGETATION, ALLOW THE CHANNEL TO DRAIN THROUGH
THE STONE CHECK DAM AND PREVENT LARGE FLOWS FROM CARVING SEDIMENT
OVER THE DATA. ADD STONES 70 DAMS AS NEEDED TO MAINTAIN DESIGN WEIGHT
AND CROSS SECTION,
TEMPORARY GRAVEL CHECK DAM
PSSYJGPO/PO /
I
WHIN J 1 `14
Z°-T COARSE
AGGREGATE
(SURGE STONE) h5
REQUIRED-/
CONSTRUCTION SPECIFICATIONS
1, CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, BOOTS, AND OTHER OBJECTIONABLE
MATERIAL AND PROPERLY GRADE M
2, PLACE THE GRAVEL TO THE SPECIFIC GRADE AND DIMENSIONS SHOWN ON THE PLANS AND
SMOOTHii,
3. PROVIDE DRAINAGE 70 CARRY WATER TO A SEDIMENT TRAP OR OU IER SUITABLE OUTLET.
4, USE NONWOVEN GEOTEXTILE FABRICS BECAUSE THEY IMPROVE STABILITY OF THE: FOUNDATION IN LOCATIONS
SUBJECT TO SEEPAGE OR HIGH WATER TABLE
MAINTENANCE:
MAINTAIN THE GRAVEL PA IN A CONDITION TO PREVE14T MUD OR SEDIMENT FROM LEAV III THE
CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2 INCH STONE, AFTEREACH
RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY,
IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIAL SPILLED, WASHED OR TRACKED DOLE PUBLIC
ROADWAYS.
TEMPORARY CONSTRUCTION ENTRANCE
I �
A — AFs
oa
=W
PLAN
a
APRON LENGTH NONWOVEN EXTRA STRENGTH PER US
FABRICS (US 205 N1')NCDOT TYPE 2"
OR APPROVED EQUIVALENT
L APRON
THICKNESS
SECTION A -A
CONSTRUCTION SPECIFICATIONS
L ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE REQUIRED LINES AND GRADES
SHOWN IN THE PLAN, COMPACT ANY FILL REQUIRED III THE SUBGRADE TO THE DENSITY OF THE
SURROUNDING UNDISTURBED MATERIAL. LOWAREAS III THE SUBGRADE ON UNDISTURBED SOIL MAY
ALSO RE IIIE,D BY INCREASING THE RIPRAP THICKNESS.
2 TIIE RIPRAP AND GRAVEL FILTER MUST CONFORNI TO THE SPECIFIED GRADING UNITS SHOVIN UN THE
PLANS.
3. FILTER CLOTH{ WHEN USED MUST MEET DESIGN REQUIREMENTS AND BE PROPERLY PROTECTED FROM
PUNCH LNG OR TEARING DURINGINSTALLATION.ITUER CLOT. REPAIRANYDDAMAGEAMAGED
R REMOVING THE RIPRAP
ANDPLACINGSHAG ANOTHER PIA FA OF O I FO IF VERTHE DAMAGE
EO AREA. ALL LACE T!ITNG
JOINTS SHOULD OVERLAP A MINIMUfd OF 1 F. IF THE DAMAGE IS IXIENSIVE, REPLACE TTiE ENTIRE
FILTER CLOTH.
4, RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DANIAGING THE FILTER
5, THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE IS TIMES THE MAXIMUM STONE DIAMETER.
6, RIPRAP 41AY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD, ANGULAR, HIGHLY
WEATHER -RESISTANT AND WELL GRADED.
7. CONSTRUCT THE APRON ON HBO GRADE VAT14 NO OVERFALLAT THE END. MAKE THE TOP BETTIE
RIPMP AT THE DOWNSTREAM END LEVEL VIITH THE RECEIVING AREA 08 SLIGHTLY BELOW H.
B. ENSURE 711AT THE APRON IS PROPERLY ALIGNED WITH THE RECEDING STREAM AND PREFERABLE
STRAIGHT THROUGHOUT ITS LENGTH{. IF A CURVE IS NEEDED TO FIT SITE CONDITIONS, PLACE. IT IN THE
UPPER SECTION OF THE APRON,
9, IMMEDIATELY AFTER CONSTRUCTION, STABILIZE ALL DISTURBED AREAS WITH VEGETATION.
MAINTENANCE:
INSPECT RIPRAP OUTLET STRUCTURES AFTER HEAVY GAINS TO SEE IF ANY EROSION AROUND OR BELOW
THE RIPRAP HAS TAKEN PLACE OR IF STONES HAVE BEEN DISLODGED. IMMEDIATELY MAKE ALL NEEDED
REPAIRS TO PREVENT FURTHER DAMAGE.
RIP RAP OUTLET PROTECTION
NEWRIPRAPM EXISTING
EXTEND TO TOP GRADE
OFEMSTING BOTTOM WIDTH
CHANNEL BANKS
• Q1 1�
O O
PBIPRA
BURY ENDS OF THICKNESS
FILTER FABRIC
12' MINIMUM
TYPICAL MINIMUM'G5O'STONE
SIZE AS INDICATED
FILTER FABRIC TYPICAL
SUBGRADE PREPARATION - PREPARE THE SUBGRADE FOR RIPRAP AND FILTER TO THE REQUIRED LINES
AND GRADES INDICATED ON THE PLANS. COMPACT ANY FlLL REQUIRED IN THE SUBGRADE TO A
DENSITY APPROXIMATING THAT OF THE SURROUNDING UNDISTURBED MATERIAL OR OVERFILL
DEPRESSIONS WILL RIPRAP. REMOVE BRUSH, TREES. STUMPS AND OTHER OBJECTIONABLE MATERIAL.
CUD THE SUBGRADE SUFFICIENTLY DEEP THAT THE EXISTED GRADE OF THE RIPRAP WILL BE AT THE
ELEVATION OF ME SURROUNDING AREA. CHANNELS SHOULD BE EXCAVATED SUFFICIENTLY TO ALLOW
PLACEMENT OF THE RIPRAP IN A MANNER SUCH THAT THE FINISHED INSIDE DIMENSIONS AND GRADE
OF THE RIPRAP MEET DESIGN SPECIFICATIONS.
SYNTHETIC FILTER FABRIC- PLACE THE FILTER FABRIC DIREGILYON THE PREPARED SURGRADE. OVERLAP
THE EDGES BYAT IEAST 12-INCIIES AND SPACE ANCHOR PINS EVERY 3-FEET ALONG THE OVERLAP. BURY
THE UPPER AND LOWER ENDS OF THE CLOTH A MINIMUM OF 12-INCHES BELOW GROUND. TAKE CARE
NOT TO DAMAGE THE CLOTH WHEN PLACING RIPMP, IF DANIAGE OCCURS, REMOVE THE RIPMP AND
REPAIR THE SHEET BY ADDING ANOTHER LAYER OF FILTER MATERIAL WITH A MINIMUM OVER AP OF
124NCHES AROUND THE DAMAGED AREA. IF EXIENSWE DAMAGE IS SUSPECTED, REMOVE AND REPLACE
THE ENTIRE SHEET
WHERE LARGE STONES ARE USED OR MACHINE PLACEMENT IS DIFFICULY, A 4INCH LAYER OF FINE
GRAVEL OR SAND MAY BE NEEDED TO PROTECT THE FILTER CLOTH-
STONE PLACEMENT - PLACEMENT OF RIPRAP SHOULD FOLLOW IMMEDIATELY AFTER PLACEMENT OF THE
FlLTER FABRIC. PLACE RIPRAP SO THAT IT FORMS A DENSE WELL GRADED MASS OF STONE WITH
MINIMUM VOIDS, THE DESIRED USTRIBUFION OF STONES THROUGHOUT THE MASS MAY BE OBTAINED
BY SELECTIVE LOADING AT THE QUARRY AND CONTROLLED DUMPING DURING FINAL PLACEMENT.
PLACE RIPRAP TO ITS FULL THICKNESS IN ONE OPERATION. DO NOT PLACE RIPRAP BY DUMPING
THROUGH CROPS OR OTHER METHODS THAT CAUSE SEGREGATION OF STONE SIZES. TAKE CARE NOT
TO DISLODGE THE UNDERLYING BASE OF FILTER FABRIC WHEN PLACING THE STONES.
THE FINISHED SLOPE SHOULD BE FREE OF POCKETS OF SMALL STONE OR CLUSTERS OF LARGE STORES,
HAND PLACING MAY BE NECESSARY TO ACHIEVE THE PROPER DISTRIBUTION OF STONE SIZES TO
PRODUCE A RELATIVELY SHROTH, UNIFORM SURFACE. THE FINISHED GRADE OF THE RIPMP SHOULD
BLEND (MATCH GRADE) WITH THE SURROUNDING AREA. NO OVERFALL OR PROTRUSION OF SPEND
SHOULD BE APPARENT WHICH WOULD IMPAIR STREAM FLOWS
3 RIP RAP CHANNEL PROTECTION
SEEDING
SOIL AND VEGETATION
PER INC WILDLIFE REQUEST, OVER SEED DISTURBED AREA WITH A MIXTURE OF RED CLOVER,
CREEPING RED FESCUE, AND A GRAIN SUCH AS RYE, OAT OR WHEAT. THE SEEDING MIXTURE,
SEEDING RATE, AND SOIL PREPARATION IS TO BE DETERMINED BY AN ENVIRONMENTAL
PROFESSIONAL AND SUBMITTED PRIOR TO APPLICATION.
DEWATERING
¢C �� c
/ BLOCK
0
°
°Oro
'^ `°-2:1 SLOPE,
GRAVEL FILTER
TEMPORARY WASRED ///'''""" WIRE SCREEN
POOLSEGMENT STONE /
/ �-WRE SUE
1 MIN. T
2 MAX,., -� � �iG
SEDIMENT
DROP INLET
WHO GRATE
SECTION
CONSTRUCTION SPECIFICATIONS:
L LAY ONE BLOCK ON EACH SIDE OF THE STRUCTURE 0141TS SIDE III THE BDTTOM HOW TO ALLOW POOR.
DRAINAGE. THE FOUNDATION SHOULD BE EXCAVATED AT LEAST 2-INCHES BELOW THE CREST OF THE
STORM GRAIN. PLACE THE BOTTOM ROW OF BLOCKS AGAINST THE EDGE OF THE STORM DRAIN FOR
LATERAL SUPPORT AND TO AVOID WASHOUTS WHEN OVERFLOW OCCURS. IF NEEDED, GIVE LATERAL
SUPPORT TO SUBSEQUENT ROWS BY PLACING 2" x 4• WOOO STUDSTHROUGH BLOCK OPENINGS.
2, CAREFULLY FIT HARDWARE CLOTH{ OR COMPARABLE WIRE MESA WHO y-INCHOPENINGSOVEBALL
BLOCK OPENINGS TO HOLD GRAVELE. IN PLACE
3, USE CLEAN GRAVEL, I
- TOY -RICH IN DIAMETER, PLACED 2 INCHES BELOW THE TOP OF THE BLOCK
ON A 2:1 SLOPE OR FLATTER AND SMOOTH IT TO AN EVEN GRADE. DDT 057 WASHED STONE IS
RECOMMENDED,
MAINTENANCE:
1, INSPECT THE BARRIER AFTER EACH MIN AND MAKE REPAIRS AS NEEDED.
2. REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR SUBSEQUENT
RAINS.
3, WILED THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABILIZED, REMOVE ALL
MATERIALS AND ANY UNSTABLE SOIL AND EITHER SALVAGE OR DISPOSE OF IT PROPERLY. BRING
THE DISTURBED AREA TO PROPER GRADE, THEN SMOOTH AND COMPACT IT. APPROPRIATELY
STABILIZE ALL BARE AREAS AROUND THE INLET.
TEMPORARY BLOCK
B ' AND GRAVEL DROP INLET PROTECTION
0501 /
WIREMESH
SUPPORT FENCE
STEEL POST TYP.
FILEFT FABRIC
MATERIAL SPECIFICATIONS:
1, USE A SYNTHETIC FILTER FABRIC OF AT LEAST 95% BYWEIGHT OF POLYOLMITS OR POLYESTER, WHICH
IS CERTIRED BY THE MANUFACTURER OR SUPPLIER AS CONFORMING TO THE REQUIREMENTS IN ASTM
D6461,
2. SYNTHETIC FILTER FABRIC SHOULD CONTAIN ULTRAVIOLET RAY INHIBITORS AND STABILIZERS.
3, ENSURE THAT POSTS FOR SEDIMENT FENCES ARE133 LB/LINEAR FEET STEEL WITH A MINIMUM LENGTH
OF 5-FEET. MAKE SURE THAT STEEL POSTS HAVE PROJECTIONS TO FACILITATE FASTENING THE FABRIC.
4. FOR REINFORCEMENT OF STANDARD STRENGTH{ FILTER FABRIC, USE WIRE FENCE WALL A MINIMUM 14-
GLASS AND A MAXIMUM MESH SPACING OF 6 INCHES,
CONSTRUCTION SPECIFICATIONS:
1, CONSTRUCT THE SEDIMENT BARRIER OF STANDARD STRENGTH OR EXTRA STRENGTH SYNTHETIC FlLTER
FABRICS.
2, ENSURE THAT THE HEIGHT OF THE SEDIMENT FENCE DOES NOT EXCEED 18 INCHES ABOVE THE GROUND
SURFACE (NIGHER FENCES MAY IMPOUND VOLUMES OF WATER SUFFICIENT TO CAUSE FAILURE OF 711E
STRUCTURE).
3. CONSTRUCT THE FILTER FABRIC FROM A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO
AVOID JOINTS, WHEN JOINTS ARE NECESSARY, SECURELY FASTEN THE FILTER CLOTH ONLY AT
SUPPORT POST VALE OVERLAP TO THE NEXT POST.
4, SUPPORT STANDARD STRENGTH RUTH FABRIC BY WIRE MESH FASTENED SECURLY TO THE UPSLOPE SIDE
OF THE POSTS USING HEAVY DUTY TIE WIRES. EXTEND THE WIRE MESH SUPPORT TO THE BOTTOM OF THE
TRENCH
5. WHEN A WIDE MESH SUPPORT FENCE IS USED, SPACE POSTS A MAXIMUM OF B FEET APART. STEEL
SUPPORT POSTS SHOULD BE DRIVEN SECURELY INTO THE GROUND TO A MINIMUM OF 1B-INCHES,
WIRE MESH SUPPORT FENCE MATERIAL SHALT. BE AGRICULTURAL. QUALITY 14 GAGE ANNEALED
STEEL WIRE WITH A D x 5' MAX. SPACING PATTERN.
6. EXTRA STRENGTH FILTER FABRIC WITH OFT POST SPACING DOES NOT REQUIRE WERE MESH SUPPORT
FENCE, TIE WIRE THE FILTER FABRIC DIRECTLY 7O PON 15,
T EXCAVATE A TRENCH APPROXIMATELY 4-INCITES WIDE AND UNCLES DEEP ALONG THE PROPOSED
LINE OF POSTS AND UPGLDPE FROMTHE BARRIER,
8, BACKFILL THE TRENCH WITH COMPACTED SOIL PLACED OVER TIIF FILTER FABRIC.
9, DO NOT ATTACH FILTER FABRIC TO EXISTING TREES
MAINTENANCE:
i. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE AIRY REQUIRED
REPAIRS IMMEDIATELY. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR
BECOME INNEFECTIVE, REPLACE IT PROMPTLY. REPLACE BURLAP EVERY BO DAYS,
2, 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 UNSTABILIZED SEDIMENT DEPOSITS.
BRING THE AREA 70 GRACE AND STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN
PROPERLY STABILIZED.
2 I,,TEMPORARY SEDIMENT FENCE
C501/ ._-.. ._._.. ..._ -..-._ ...._..- ......_...
PI ATV LMATCHWIDIROF
SEDIMENT TRAP
OUTLETWEIR
TIE INTO SEDIMENT
TRAP OUTLET WEIR L
6" DIA.RICRAC
11 O'
SFCTIDNAA
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
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ALAMANCE
AGGREGATES, LL.
Mr. Chad • ):
i
CONSTRUCTION SPECIFICATIONS
I. ENSURE THAT THE SUIGRADE FOR THE RIPRAP FOLLOWS THE REDUCED LINESAND
GRADES SHOWN IN THE PLAN COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO
IIIEDFUJSITYOFPiESURROUNDINGUNOISTUITBE➢MATERIAL. LOWARFASINiHE
SUNSHADE ON UNDISTURBED SOIL MAY ALSO BE THEN BY INCREASING THE RIPRAP
THICKNESS.
2. RIPRAP MAY BE PLACED BY EQUIPMENT.
3- THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE IS TIMES THE MAXIMUM STONE
DIAMETER.
4, RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD,
ANGULAR HIGHLY WEATHER RESISTANT AND WELL GRADED,
B. HE
TOP OF THE
THEAPRONTHE DOWNSTRERO GRADEEAM
WITH NO LEVELWFALLAT TFIETRIPIVIN MAKE OR
TOP OF Y 13 RIPMP A7 THE W WNSTREAIM END tEVEL'NITII THE RECEIVING AREA OR I
SLSUTGI RLY THATELOW
IT.
c
F. ENSURE THAT TFL. APRON IS PROPERLY ALIGNED WITH THE RECEIVING 6 TREAPI AID
PREFERABLE STRAIGHT TIINOL'GHOLR ITS LEDGTH. IF A GVRVE IS NPEDEO TO FI7 GI if
CONDITIONS. PLACE IT IN THE UPPER SECTION OF THEAPR!IN.
7, PANIEDIATELYhFi Eft CONS7RINCTION, STFlOIL 11E ALC DIGIlI.RBED ANF.hS VVITii VEGETh71pN.
Snow Camp dine j
MAINTENANCE
INSPECT RIPRAP OUTLET STRUCTURES AFTER HFAVY MINSTO SEE IFANZ MCSION
AROUND OR BELOW THE RIPRAP HAS TAKEN PLACE Oil IF STONES HAVE BEEN
DISLODGED. IMMEDIATELY MAKEALL NEEDED REPAIRS TO PREVENT FURTHER
DAMAGE,
TEMPORARY SEDIMENT
5 TRAP RIP RAP OUTLET PROTECTION
-0501 ...... ....._ _._ -.-_ _.-.. _._
i
UKF� 41M1M1IN.
}
HELD DOWN STAKES 3:1 GMII4. _
`` III- ®REVISIONS
DATE: DESCRIPTION:
PLASTIC 1pyQP 1 uu IF -Lf-
CUMUGATED , �
FILL PIPE (PER PLAN} PROJECT NUMBER:
CUTLEf,E 1��TE INLET I FLAW 2190335
DRAWN BY:
- o
STONE INLET KCG/ATC
w PROTECTION REVIEWED BY: PAS,
4'M111N (TYP•)
LEVEL - -
SECTION ISSUED FOR:
'J CONSTRUCTION
PLAN VEW
STANDARD T-SECTION -
CCNSiRUC!Oil SEE CIFICAT7ONS DATE:
7/18/19
A COMMON FAILURE OF SLOPE DRMHMI9 I5 CAUSED BY WATER SATURATING THE SOIL
AND SEEPING ALOIR THE PIPE IBIS CREATES VOIDS FROM CONSOLIDATION AND
PIPINGANOCAUSESWASHOUT6. PROPERBACKFILLINGAROUNDANOO4DERTIIE DRAWING NAME:
PIPE `HAUNCHES"VBTH STABLE SOIL hMTERIAL AND (LAND COMPACTION IN 6-INCH
i
J EC A ACHIEVE POLL FAIR UCT BETWEEN THE PIPE ADD THE SOIL AT ALL F'OIN1S WILL
ELIMINATE THIS IYPP Of PAIWR@ I
I, PLACE SLOPE DRAINS ON UNDISTURBED S08. ORWELLCONIVETED FILL AT LOCATIONS
AND ELEVATIDNG GIIGV4N ON TFIE FLANS.
2 SUGARY SLOPE TFIE SECTION OF PIPE UNDER THE OFF TOWARD ITS CUTLET
3. WOO TAWIRIFSO!L RUDER AND AROUND THE ENRIANOr SECTION IN LIFTS LET 10
EXCEED 6 INCHES.
4. ENSURE THAT FILL OVER HEDRAINATTHETO70fTIESLOPEHASMINIMUNI EROSION ��
DI6".FNSIONS OF iTH, AM ,5 FT. DEP4 U. TOP N711 AND 3:1 SIDE SLOPES,
5. ENSURE II OFF ALL St OFEOM@t CORRECTIONS ARE WAL TIGHT
6. I'l THAT AL L. FlLL MATERIAL IS Af IL -CO. PAJIED. SECURELY FAST EN RIF SEDIMENT
EXPOSED SECTION OF 1)N DRAIN ATIII GROMMETS OR STAKES SPACED 140 MORE CONTROLI'
HEAR 10 FEET APART.
7. EXTEND THE DRAIN BEYOND THE TOE OF THE SLOPE AND ADEQUATELY PROTECT THE
OUTLET FROM EROSION
ETAIL
8, OF THE
THE SUIT ATVE COMPACTED DIKE RIDGE NO LEGS THAN i-FEET ABOVE 711E TOP
OF 71{F PIPE Al' EVERY POIhNi. '
9- IMMEDIATELY STABILIZE ALI. (DISTURBED AREAS 101 TOWNS CONSTRUCTION.
MAIHENANCE'. DRAWING NUMBER:
INSPECT THE SLOPE CRAW AND SUPPORTING DIVERSION AFTER EVERY RAINFALL
AND PROMPTLY MAKE NECESSARY REPAIRS- WHI'Ll THE PROTECTED AREA HAS BEEN
PERMANENTLY STABII IZEI), TEMPORARY MEASURES LMAY BB RELIOVED, IMA7ERIALS
DISPOSED OF PROPERLY, AND ALL DISTURBED AREAS STABILIZED APPROPRIATELY
TEMPORARY SLOPE DRAIN
C501 r'

Definition
Planting rapid -growing annual grasses, small grains, or legumes to provide
initial, temporary cover for erosion control on disturbed areas.
Purpose
To temporarily stabilize denuded areas that will not be brought to final grade
for a period of more than 21 calendar days.
Temporary seeding controls runoffand erosion until permanent vegetation or
other erosion control measures can be established. In addition, it provides
residue for soil protection and seedbed preparation, and reduces problems of
road and dust production from bare soil surfaces during construction,
Conditions Where
On any cleared, unvegetated, or sparsely vegetated soil surface where
Applies
vegetative etahve cover is needed for less than I year. Applications of this practice
include diversions, dams, temporary sediment basins, temporary road banks.
and topsoil stockpiles.
Planning
Annual plants, which sprout and grow rapidly and survive for only one season.
Considerations
are suitable for establishing initial or temporary vegetative cover. Temporary
seeding preserves the integrityof earthen sediment control structures such
as dikes, diversions, and the banks of dams and sediment basins. It can also
reduce the amount of maintenanceassociated with these devices. For example,
the frequency of sediment basin cleanouts will be reduced if watershed areas,
outside the active construction zone, are stabilized.
Proper seedbed preparation, selection of appropriate species, and use of quality
seed are as important in this Practice as in Practice 6.1 I , Permanent Seeding.
Failure to follow established guidelines and recommendations care£lly may
result in an inadequate or short-lived stand of vegetation that will not control
erosion.
Temporary seeding provides protection for no more than i year, during which
time permanent stabilization should be initiated.
Specifications
Complete grading before preparing seedbeds, and install all necessary erosion
control practices such as, dikes, waterways, and basins. Minimize steep slopes
because they make seedbed preparation difficult and increase the erosion
hazard. if soils become compacted during grading, loosen them to a depth of
6-8 inches using a ripper, harrow, or chisel plow.
SEEDBED PREPARATION
Good seedbed preparation is essential to successful plant establishment. A
good seedbed is welt -pulverized, loose, and unif'onn. Where hydroseeding
methods are used, the surface may be left with amore irregular surface of
large clods and stones.
Liming -Apply lime according to soil test recommendations. Ifthe pH (acidity)
of the soil is not known, an application of ground agricultural limestone at the
rate of I to 1 1/2 tons/acre on coarse -textured soils and 2-3 tons/acre on fine -
textured soils is usually sufficient. Apply limestone uniformly and incorporate
into the top 4-6 inches of soil. Soils with a pH of 6 or higher need not be
limed.
Fertilizer -Base application rates on soil tests. When these are not possible,
apply a 10-10-10 grade fertilizer at 700-1,000 lb/acre. Both fertilizer and time
should be incorporated 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 recent tillage operations have resulted in a loose
surface, additional roughening may not be required, except to break up large
clods. if rainfall causes the surface to become 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
(Practice 6.03, Surface Roughening).
PLANT SELECTION
Select an appropriate species or species mixture from Table 6.1 Oa for seeding
in late winter and early spring, Table 6.1 Ob for summer, and Table 6.1 Oc for
fall.
In fine Mountains, December and January secdings have pool- chances of
success. When it is necessary to plant at these times, use recommendations
for fall and a securely tacked mulch.
SEEDING
Evenly apply seed using a cyclone seeder (broadcast), drill, cultipacker seeder,
or hydrosceder. Use seeding rates given in Tables 6.1Oa-6.IOc, Broadcast
seeding and hydrosceding are appropriate for steep slopes where equipment
cannot be driven, Hand broadcasting is not recommended because of the
difficulty in achieving a uniform distribution.
Small grains should be planted no more than 1 inch deep, and grasses and
legumes no more than 1/2 inch. Broadcast seed must be covered by raking
or chain dragging, and then lightly firmed with a roller or cultipacker,
Hydroseeded mixtures should include a wood fiber (cellulose) mulch.
MULCHING
The use of all appropriate mulch will help ensure establishment under normal
conditions, and is essential to seeding success under harsh site conditions
(Practice 6.14, Mulching). Harsh site conditions include:
• seeding in fall for winter cover (wood fiber mulches are not considered
adequate for this use),
• slopes steeper than 3: 1,
• excessively hot or dry weather,
• adverse soils (shallow, rocky, or high in clay or sand), and
• areas receiving concentrated flow.
If the area to be mulched is subject to concentrated waterflow, as in channels,
anchor mulch with netting (Practice 6.14, Mulching).
Maintenance
Reseed and mulch areas where seedling emergence is poor, or where erosion
occurs, as soon as possible. Do not mow. Protect from traffic as much as
possible.
References
Site Preparation
6.03, Surface Roughening
6.04, Topsoiling
Su7f ice Stabilization
6.11, Permanent Seeding
6.14, Mulching
Appendix
8.02, Vegetation Tables
TEMPORARY SEEDING DETAIL
Table 6.10a
Temporary Seeding
p ry 9
Recommendations for Late
Winter and Early Spring
Table 6.10b
Temporary Seeding
Recommendations for
Summer
Table 6.10c
Temporary Seeding
Recommendations for Fail
Seeding mixture
Rate Species (lb/acre)
p
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.
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 Ib/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.
Seeding mixture
Species Rate (lb/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 4,00o lb/acre straw. Anchorstraw 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.
NOTES
1. STRUCTURAL STONE SHALL BE
CLASS B STDBR
2. SEDIMENT CONTROL STONE
SHALL BE NO, 6 OR NO, 57
STONE.
3, DIMENSIONS ARE MINIMUM
ACCEPTABLE UNLESS OTHERWISE
SPECIFIED BY THE ENGINEER,
STRUCTURAL STONE
FLOOD STORAGE ZONE
SEDIMENT STORAGE ZON
NATURAL GROUND
E OW
PIPE MAX
SEDIMENT CONTROL STONE_/ SECTION A -A
ANDARD ROCK PIPE INLET PROTECTION
CONSTRUCTIDN SPECIFICATIONS:
1. REMOVE AND PROPERLY DISPOSE OF ALL TREES, BRUSH, STUMPS AND OTHER OBJECTIONABLE
MATERIAL
2. ENSURE THAT THE MINIMUM CONSTRUCTED CROSS SECTION MEETS ALL DESIGN REQUIREMENT
3, ENSURE THAT THE TOP OF THE DIKE IS NOT LOWER AT ANY POINT THAN THE DESIGN ELEVATION
PLUS THE SPECIFIED SETTLEMENT.
4, PROVIDE SUFFICIENT BOOM AROUND DIVERSIONS IO PERMIT MACHINE REGRADING AND
CLEANOUT.
5, VEGETATE THE RIDGE IMMEDIATELY AFTER CONSTRUCTION, UNLESS IT WILL REMAIN IN PLACE
LESS THEN 30 WORKING DAYS.
MAINTENANCE
INSPECT TEMPORARY DIVERSIONS ONCE A WEEK AND AFTER EVERY RAINFALL, IMMEDIATELY
REMOVE SEDIMENT FROM THE FLOW AREA AND REPAIR 714E DIVERS1014 RIDGE. CAREFULLY
CHECK OUTLETS AND MAKE TIMELY REPAIRS AS NEEDED, WHEN THE AREA PROTECTED IS
PERMANENTLY STABILIZED, REMOVE THE RIDGE AND THE CHANNEL TO TURN WITH THE NATURAL
GROUND LEVEL AND APPROPRIATELY STABILIZE IT.
TEMPORARY DIVERSION DITCH
DEFINFRON: POROUS BARRIERS INSTALLED INSIDE A TEMPORARY SEDIMENT TRAP, SKIMMER BASIN, OR SEDIMENT BASIN TO REDUCE
THE VELOCITY AND TURBULENCE OF THE WATER FLOWING THROUGH THE MEASURE, AND TO FACILITATE THE SETTLING OF SEDIMENT
FROM THE WATER BEFORE DISCHARGE.
SEDIMENT TRAPS AND BASINS ARE DESIGNED TO TEMPORARILY POOL RUNOFF WATER TO ALLOW SEDIMENT TO SETTLE
BE�FORE THE WATER IS DISCHARGED. UNFORTUNATELY, THEY ARE USUALLY NOT VERY EFFICIENT DUE TO HIGH TURBULENCE AND
"SHORT-CIRCUITING" FLOWS WHICH TAKE RUNOFF QUICKLY TO THE OUTLET WITH LITTLE INTERACTION WITH MOST OF THE BASIN.
POROUS BAFFLES IMPROVE THE RATE OF SEDIMENT RETENTION BY DISTRIBUTING THE FLOW AND REDUCING TURBULENCE. THIS
PROCESS CAN IMPROVE SEDIMENT RETENTION.
CONDITIONS WHERE PRACTICE APPLIES THIS PRACTICE SHOULD BE USED IN ANY TEMPORARY SEDIMENT TRAP, SKIMMER BASIN, OR
TEMPORARY SEDIMENT BASIN.
PLANNING CONSIDERATIONS: POROUS BAFFLES EFFECTIVELY SPREAD THE FLOW ACROSS THE ENTIRE WIDTH OF A SEDIMENT BASIN OR
TRAP. WATER FLOWS THROUGH THE BAFFLE MATERIAL, BUT IS SLOWED SUFFICIENTLY TO BACK UP THE FLOW, CAUSING IT TO SPREAD
ACROSS THE ENTIRE WIDTH OF THE BAFFLE. SPREADING THE FLOW IN THIS MANNER UTILIZES THE FULL CROSS SECTION OF THE
BASIN, WHICH IN TURN REDUCES FLOW RATES OR VELOCITY AS MUCH AS POSSIBLE. IN ADDITION, THE TURBULENCE IS ALSO
GREATLY REDUCED. THIS COMBINATION INCREASES SEDIMENT DEPOSITION AND RETENTION AND ALSO DECREASES THE PARTICLE SIZE
OF SEDIMENT CAPTURED. THE INSTALLATION SHOULD BE SIMILAR TO A SEDIMENT FENCE. THE FABRIC SHOULD BE 700 G/M2 COIR
EROSION BLANKET OR EQUAL A SUPPORT WIRE ACROSS THE TOP WILL HELP PREVENT EXCESSIVE SAGGING IF THE MATERIAL IS
ATTACHED TO IT WITH APPROPRIATE TIES.
DESIGN CRITERIA: THE TEMPORARY SEDIMENT TRAP OR TEMPORARY SEDIMENT BASIN SHOULD BE SIZED USING THE APPROPRIATE
DESIGN CRITERIA. THE PERCENT OF SURFACE AREA FOR. EACH SECTION OF THE BAFFLE IS AS FOLLOWS:
• INLET ZONE - 25%
• FIRST CELL - 25%
• SECOND CELL - 25%
• OUTI-ET ZONE - 25%
BAFFLE SPACING IN FUTURE PERMANENT STORMWATER BASINS IS BEYOND FOREBAY. BE SURE TO CONSTRUCT BAFFLES UP THE
SIDES OF THE TRAP OR BASIN BANKS SO WATER DOES NOT FLOW AROUND THE STRUCTURES. MOST OF THE SEDIMENT WILL BE
CAPTURED IN THE INLET ZONE. SMALLER PARTICLE SIZE SEDIMENTS ARE CAPTURED IN THE LATTER CELLS, BE SURE TO MAINTAIN
ACCESS TO THE TRAP FCR MAINTENANCE AND SEDIMENT REMOVAL THE DESIGN UFE OF THE FABRIC IS 6-12 MONTHS, BUT MAY
NEED TO BE REPLACED MORE OFTEN IF DAMAGED OR CLOGGED.
CONSTRUCTION SPECIFICATIONS:
MATERALS
1. USE MATTING MADE OF 100% COCONUT FIBER (COIR) TWINE WOVEN INTO HIGH STRENGTH MATRIX WITH THE PROPERTIES SHOWN
IN THE TABLE BELOW.
2. STAPLES SHOULD BE MADE OF 0.125 INCH DIAMETER NEW STEEL WIRE FORMED INTO A •U' SHAPE NOT LESS THAN 12 INCHES
IN LENGTH WITH A THROAT OF 1 INCH IN WIDTH. :THE STAPLES ANCHOR THE POROUS BAFFLES INTO THE SIDES AND BOTTOM
OF THE BASIN.
3. ENSURE THAT STEEL POSTS FOR POROUS BAFFLES ARE OF A SUFFICIENT HEIGHT TO SUPPORT BAFFLES AT DESIRED HEIGHT.
POSTS SHOULD BE APPROXIMATELY 1-3/8' WIDE MEASURED 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 INCHES AND
BE OF THE SELF -FASTENER ANGLE STEEL TYPE TO HAVE A MEANS OF RETAINING WIRE AND COIR FIBER MAT IN THE DESIRED
POSITION WITHOUT EMPLACEMENT.
4. USE 9-GAUGE HIGH TENSION WIRE FOR SUPPORT WIRE.
COIR FIBER BAFFLE MATERIAL PROPERTY REQUIREMENTS
THICKNESS
0.30 IN. MINIMUM
TENSILE STRENGTH (WET)
90OX680 LB/FT MINIMUM
ELONGATION (WET)
69% X 34% MAXIMUM
LOW VELOCITY
10-12 FT/SEC
WEIGHT
20 OZ/SY (680 G/M� MINIMUM
MINIMUM WIDTH
6.5 FEET
OPEN AREA
50% MAXIMUM
CONSTRUCTION
1. GRADE THE BASIN SO THAT THE BOTTOM IS LEVEL FROM TO BACK AND SIDE TO SIDE.
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 POLL
DEPTH DURING USE A TEMPORARY SEDIMENT BASIN.
7. EXTEND 9 GAUGE MNIMUM HIGH TENSION WIRE STRAND 0 SIDE OF BASIN OR INSTALL STEEL T-POSTS TO ANCHOR BAFFLE TO
SIDE OF BASIN AND SECURE TO VERTICAL END POSTS.
B. DRAPE THE COIR FIBER MAT OVER THE WIRE STRAND MOUNTED AT A HEIGHT OF 6 INCHES ABOVE THE SPILLWAY ELEVATION.
SECURE THE COIR FIBER MAT TO THE WIRE STRAND WITH PLASTIC TIES OR WIRE FASTENERS. ANCHOR THE MATTING TO THE
SIDES AND FLOOR OF THE BASIN WITH 12 INCHES WIRE STAPLES, APPROXIMATELY 1 FT APART, ALONG THE BOTTOM AND SIDE
SLOPES OF THE BASIN.
9. DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN
10. ADJUSTMENTS MAY BE REQUIRED IN THE STAPLING REQUIREMENTS TO FIT INDIVIDUAL SITE CONDITIONS.
MAINTENANCE: INSPECT RIFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL MAKE ANY REQUIRED REPAIRS IMMEDIATELY. BE
SURE TO MAINTAIN ACCESS 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 BAFFLE
MATERIALS AND UNSTABLE SEDIMENT DEPOSITS, BRING THE AREA TO GRADE, AND STABILIZE IT.
/ B `POROUS BAFFLES
G502
CONSTRUCTION 3PECRICATIONS
12°MIN. WASHED
--'TOP OF DAM
1.CLEAR, GRUB AND STRIP THE AREA UNDER THE EMBANKMENT OF ALL VEGETATION
STONE FILTER
5'MIN, 70POFWEIR
AND ROOT MOT. REMOVE. ALL SURFACE SOIL CONTAINING HIGH AMOUNTS OF
NWOT STD.#57
ORGANIC AWTER AND STOCKPILE OR DISPOSE OF IT PROPERLY. PAUL ALL
3600 CU. FT./ACRE
.5'
T
OBJECTIONABLE MATERIAL TO THE DESIGNATED DISPOSAL AREA.
5'FMA%.
2, ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE OF ROOTS, WOODY
SEDIMENTTRAP R1 I
Z, FILL
VGULINIIUIV JItUN\YIL LMIICII ftL1UUlULIt UUJ[LIIULIftULL ,nNiCI11flL. Y1J\LL
��..��pp��
THE FILL III THIS NOT TO EXCEED 9-INCHES AND MACHINE COMPACT IT. OVERALL
THE EMBANKMENT 6-INCHES TO ALLOW FOR SETTLEMENT.
COARSEST ONE FILL
3, CONSTRUCTME OUTLET SECTION In THE EMBANKMENT. PROTECT THE CONNECTION
CRASS R EROSION
ROSIOSIONE
HLTEfl FABRIC
SETANEEN TFHF RIPRAP AND THE SOIL FROM PIPING DY USING FILTER FABRIC OR A
CLASSA
KEYWAY CUTMFF TRENCH BETWEEN THE RIPRAP STRUCTURE AND THE SOIL
CROSS SECTION
a. PLACE THi FILTER FABRIC BETWEEN THE RIPRAP AND SOIL EXTEND THE FABRIC
ACROSS THE SPILLWAY FOUNDATION AND SIDES TO THE TOP OF THE DAM;
OR
OVERFILL 6. FOR EMERGENCY BY-PASS 6'
b, EXCAVATE A KEYWAY TRENCH ALONG THECENTERLINE OFTHE SPILLWAY
DESIGN
SETTLEMENT BELOW SETTLED TOP
FOUNDATON EXTENDING UP THE SIDES TO THE HEIGHT OF THE DAM. THE WENCH
SETTLED
211N
OFDAM
SHOULD BE AT LEAST&FEET DEEP AND&FEET WIDE WITH I:I SIDE SLOPES.
TOP
5'
1.51-
4, CLEAR THE NBC AREA BELOW THE ELEVATION OF THE CREST OF THE EMBANKMENT.
I
5. ALL CUT ANDFILL SLOPES SHOULD BE 21 OR FLATTER.
SM
6, ENSURE THAT THE STONE (DRAINAGE) SECTION OF THE EMBANKMENT FURS A MINIMUM
Fl L
NATURAL
BOTTOM WIDTH OF 3-FEET AND MAXIMUM SIDE SLOPES OF 1:1 THAT EXTEND TO THE
_
GROUND
BOTTOM OF TIE SPILLWAY SECTION,
3'
7. CONSTRUCT -HE MINIMUM FINISHED STONE SPILLWAY BOTTOM WIDTH, AS SHOWN ON
21 SIDE
IN.
THEPLANSWITH2A SIDE SLOPES EXTENDING TO THE TOP OF THE OVERFILLED
ALTER
SLOPE MAX.
EMBANKMER. KEEP THE THICKNESS OF THE SIDES OF THE SPILLWAY OUTLET STRUCTURE
FABRIC
is SLOE
AT A MIMMUM OF 21 INCHES THE WEIR MUST BE LEVEL AND CONSTRUCTED TO GRADE
SLOPE MAX.
TO ASSURE DESIGN CAPACITY. STONE SECTION
B. MATERIAL UDEO IN THE STONE SECTION SHOULD BE WELL -GRADED MIXTURE OF STONE
WAR A d50 SZE OF 9- INCHES (CLASS B EROSION CONTROL STONE IS RECOMMENDED) MAINTENANCE
AND A FMAtlhUM STONE SIZE OF 14-INCHES. THE STONE MAY BE MACHINE PLACED
ADD THE SMILLER STONES WORKED INTO THE VOIDS OF THE LARGER STONES. THE 1. INSPECT TEMPORARY SEDIMENT TRAPS AFTER EACH PERIOD OF SIGNIFICANT
STONE SHOUD BE HARD, ANGULAR, AND HIGHLY WEATHER -RESISTANT' RAINFALL, REMOVE SEDIMENT AND RESTORE THE TRAP TO ITS ORIGINAL DIMENSIONS
9, ENSURE THAI THE STONE SPILLWAY OUTLET SECTION EXTENDS DOWNSTREAM PAST THE WHEN THE SEDIMENT HAS ACCUMULATED TO THE -HALF THE DESIGN DEPTH OF THE
TOE OF THE EMBANKMENT UNTIL STABLE CONDITIONS ARE REACHED AND OUTLET TRAP PLACE THE SEDIMENT THAT 13 REMOVED IN THE DESIGNATED DISPOSAL AREA
VELOCITY IS N3CEPTABLE FOR THE RECEIVING STREAM. KEEP THE EDGES OF THE STONE AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FACING.
OUTLET SECTON FLUSH WITH THE SURROUNDING GROUND AND SHAPE THE CENTER TO 2 CHECK THE STRUCTURE FOR DAMAGE FROM EROSION OR PIPING. PERIODICALLY
CONFINE THEOUTFLOW STREAM (REFERENCES: OUTLET PROTECTION). CHECK THE DEPTH OF THE SPILLWAY TO ENSURE IT IS A MINIMUM OF 1.5 r. BELOW
10, DIRECT EMERGENCY BYPASS TO NATURAL, STABLE AREAS. LOCATE BYPASS OUTLETS THE LOW POINT OF THE EMBANKMENT. IMMEDIATELY ALL ANY SETTLEMENT OF THE
SO THAT nW WILL NOT DAMAGE THE EMBANKMENT. EMBANKMENT TO SLIGHTLY ABOVE DESIGN GRADE. ANY RIPRAP DISPLACED FROM
11. STABILIZE TIE EMBANKMENT AND ALL DISTURBED AREAS ABOVE. 711E SEDIMENT POOL THE SPILLWAYtMUST BE REPLACED IMMEDIATELY.
AND DOWNSTREAM FROM THE TRAP IMMEDIATELY AFTER CONSTRUCTION 3. AFTER ALI.SEDIMENT-PRODUCING AREAS HAVE BEEN PERMANENTLY STABILIZED.
(REFERENCE: SURFACE STABILIZATION). REMOVE 711E STRUCTURE AND ALL UNSTABLE SEDIMENT, SMOOTH THE AREA TO
12. SHOW THE DSTANCE FROM THE TOP OF THE SPILLWAY TO THE SEDIMENT CLEANOUT BLEND WITH THE ADJOINING AREAS AND STABILIZE PROPERLY (REFERENCES!
LEVEL(ONE-4ALF THE DESIGN DEPTH) ON THE PLANS AND MARK IT IN THE FIELD. SURFACE STABILIZATION.
TEMPORARY SEDIMENT TRAP
WOVE]
GENERAL NOTES
MNNTENANCENOTES:
1. SEDIMENT FILTER OUTLET SHALL BE 16 INCHES HIGH BUT NO
1, FILTER OUTLETS SHALL BE INSPECTED BY THE FINANCIALLY
TALLER THAN 18 INCHES
RESPONSIBLE PARTY OR HIS AGENT IMMEDIATELY AFTER
EACH RAINFALL AND AT LEAST DALY DURING PROLONGED
2, CRASS I OR 2 RIP -RAP SHALL BE USED AND COVERED WITH
RAINFALL. ANY REPAIRS NEEDED SHALL BE MADE
61NCHES OF NOBOT 05 OR*57 WASHED STONE ON THE
IMMEDIATELY,
UPSLOPE SIDE
2. THE STONE SHALL BE REPLACED PROMPTYARTER ANY
3. POSTS SHALL BE NO MORE THAN 4 FEET APART.
EVENT THAT RAS CLOGGED OR REMOVED T.
4. SITE OUTLETS AT ANY POINT SMALL CONCENTRATED FLOWS
3. SEDIMENT DEPOSITS SHOULD BE REMOVED WHEN
ARE ANTICIPATED AND AT THE DIRECTION OF THE
DEPOSITS REACH HALF THE HEIGHT OF THE BARRIER ANY
INSPECTOR,
SEDIMENT DEPOSITS REMANDING IN PLACE AFTER THE SILT
FENCE OUTLET IS REMOVED SHALL BE DRESSED TO
5, ONE ACRE tMM14UM DRAINAGE AREA PER OUTLET.
CONFORM TONE DUSTING GRACE, PREPARED AND
SEEDED,
ILT FENCE STONE OUTLET
SECTION
STEEL POST
CLASSIOR2 I'MIN WASHEDSTONE
RIP -RAP (NCDOT 05 OR N57)
ow
M1RR a xAlawx aom un w®
DRAG A DRNWBD AD1M M
R110lYt CGC1� „N,o„oo„<x,nn.
PLAN
#57 WASHED STONE & WIRE INLET PROTECTION
NOTE;
BASIN DESIGN
. SEE PROJECT EROSION CONTROL PLAN FOR SPECIFIC BASIN DIMENSIONS AND ORIENTATION
WATER LEVEL ELEV Z
5-9
m
m
TYPICAL BASIN PLAN
FLOATING SURFACE
MIN.
TOP OF DAM
SKIMMER SEE DETAIL
§
E
ELEVATION
2
-`EMERGENCY
Iv
SUPPORT ROPE OR SUPPORT POST STAKE TO
BAFFLE 2 1
SPILLWAY WIRE TO PREVENT 2V INTO BOTTOM SUPPORTWIRE
ELEVATION SAGGING 08810E
BASIN BOTTOM ELEVATION
COMPACTEDEARTH
_
EMBANKMENT STABILIZED
CHILE.
' PARTIAL BASIN SECTION PROTECTION
CONSTRUCTION SPECIFICATIONS
Coln SIMILAR
STAPLED T
TRENCHED
BAFFLE ELEVATION STAPLEDDORENCHER
i. CLEAR, GRUB, AND STRIP THE AREA UNDER THE EMBANKMENT OFALL VEGETATION AND
INTO BOTTOM OR SIDE
HOOT MAT. REMOVE ALL SURFACE SOIL CONTAINING HIGH AMOUNTS OF ORGANIC
CONSTRUCTION SPECIFICATION
MATTER AND STOCKPILE OR DISPOSE OF IT PROPERLY. HAUL ALL OBJECTIONABLE MATERIAL
TO THE DESIGNATED DISPOSAL AREA, PLACE TEMPORARY SEDIMENT CONTROL MEASURES
1. GRADE THE BASIN SO THE BOTTOM IS LEVEL FRONT TO BACK AND SIDE TO SIDE.
BELOW BASIN AS NEEDED.
2. INSTALL POST ACROSS THE WIDTH OF THE SEDIMENT TRAP (PRACTICE 662, SEDIMENT FENCE)
3, STEEL POST SHOULD BE DRIVEN TO A DEPTH OF 24 INCHEGSPACED A MAXIMUM OF 4 FEET
2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE OF ROOTS, WOODY VEGETATION,
APART, AND INSTALLED UP THE SIDES OF THE BASIN AS WELL THE TOP OF THE FABRIC SHOULD
ORGANIC MATTER, AND OTHER OBJECTIONABLE MATERIAL. PLACE THE FILL IN LIFTS NOT TO
BE 6 INCHES HIGHER THAN THE INVERT OF THE SPILLWAY. TOPS OF BAFFLES SHOULD BE 2 INCHES
EXCEED 9INCHES, AND MACHINE COMPACT IT. OVER FILL THE EMBANKMENT 6 INCHES TO
LOWER THAN THE TOP OF THE BERMS.
ALLOW FOR SETTLEMENT.
4, INSTALL AT LEAST THREE ROWS OF BAFFLES BETWEEN THE AND THE OUTLET POINT. BASINS
LESS THAN 20 FEET IN LENGTH MAY USE 2 BAFFLER. `
3. SHAPE THE BASIN TO THE SPECIFIED DIMENSIONS. PREVENT THE SKIMMING DEVICE FROM
5, WHEN USING POST, ADD A SUPPORT WIRE OR ROPE ACROSS THE TOP OF THE MEASURE TO
SETTLING INTO THE MUD BY EXCAVATING A SHALLOW PIT UNDER THE SKIMMER OR
PREVENT SAGGING,
OR PROVIDING A LOW SUPPORT UNDER THE SKIMMER OF STONE OR BLOCK.
6, WRAP POROUS MATERIAL, LIKE JUTE BACKED BY COIN MATERIAL, OVER THE TOP WIRE. 711E FABRIC
SHOULD HAVE FIVE TO TEN PERCENT OPENINGS IN THE WEAVE. ATTACH FABRIC TO A ROPE AND
4. PLACE THE BARREL (TYPICALLY 4-INCH SCHEDULE 40 PVC PIPE) ON A ANN, SMOOTH
SUPPORT STRUCTURE WITH ZIP TIES, WIRE, OR STAPLES.
FOUNDATION OF IMPERVIOUS SOIL DO NOT USE PERVIOUS MATERIAL SUCH AS SAND,
7. THE BOTTOM AND SIDES OF THE FABRIC SHOULD BE ANCHORED IN A TRENCH OR PINNED WITH
GRAVEL, OR CRUSIIED STONE AS BACKFILL AROUND THE PIPE. PLACE THE FILL MATERIAL
8 INCH EROSION CONTROL MATTING STAPLES.
AROUND THE PIPE SPILLWAY IN 4-INCH LAYERS AND COMPACT IT UNDER AND AROUND
8, DO NOT SPLICE THE FABRIC, BUT USE A CONTINUOUS PIECE ACROSS THE BASIN.
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
MAINTENANCE
COMPACTING UNDER THE PIPE HAUNCHES.
PLACE A MINIMUM DEPTH OF 2 FEET OF COMPACTED BACKFILL OVER THE PIPE SPILLWAY
INSPECT BAFFLES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL, MAKE ANY REQUIRED REPAIRS
BEFORE CROSSING IT WITH CONSTRUCTION EQUIPMENT. IN NO CASE SHOULD THE PIPE
IMMEDIATELY.
CONDUIT BE INSTALLED BY CUTTING A TRENCH THROUGH THE DAM AFTER THE EMBANKMENT
IS COMPLETE.
BE SURE TO MAINTAIN ACCESS TO THE BAFFLES. SHOULD THE FABRIC OF A BAFFLE COLLAPSE, TEAR,
DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT PROMPTLY.
5. ASSEMBLE THE SKIMMER FOLLOWING THE MANUFACTURERS INSTRUCTIONS, OR AS DESIGNED.
REMOVE SEDIMENT DEPOSITS WHEN IT REACHES HALF FULL TO PROVIDE ADEQUATE STORAGE
6, LAY THE ASSEMBLED SKIMMER ON THE BOTTOM OF THE BASIN WITH THE FLEXIBLE JOINT AT THE
VOLUME FOR THE NEXT RAIN AND TO REDUCE PRESSURE ON THE BAFFLES.
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
AFT ER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY STABILIZED, REMOVE ALL BAFFLE
AND ANCHOR IT TO THE SIDE OF THE BASIN. THIS WILL BE USED TO PULL THE SKIMMER TO THE
MATERIALS AND UNSTABLE SEDIMENT DEPOSITS, BRING THE AREA TO GRADE, AND STABILIZE IT.
SIDE FOR MAINTENANCE.
Sediment Basin Baffle
7, EARTH EN 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
G' IDSCIH.OAT 40 SKIMMER
THE SPILLWAY. THE PILLWAY SHOULD BE LINED WITH LAMINATED PLASTIC OR IMPERMEABLE
PVC PIPE FL
INFLUENT
GEOTWILE FABRIC. THE FABRIC MUST BE WIDE AND LONG ENOUGH TO COVER THE BOTTOM
6• PVC By
AND SIDES AND EXTEND ONTO TIE TOP OF THE DAM FOR ANCHORING IN A TRENCH. THE
BEND TYP.
EDGES MAY BE SECURED WITH B-INCH STAPLES OR PINS. 711E FABRIC MUST BE LONG ENOUGH
TO EXTEND DOWN THE SLOPE AND EXIT ONTO STABLE GROUND. THE WIDTH OF THE FABRIC
MUST BE ONE PIECE HOT 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,
SHOULD OVERLAPTHELOWER SECHON(S) SO THAT WATER CANNOT FLOW UNDER THE FABRIC.
4' PVC VENT 4°x4°TEE
SECURE THE UPPER EDGE AND SIDES OF THE FABRIC IN A TRENCH WITH STAPLES OR PINS.
8. INLETS - DISCHARGE WATER INTO THE BASIN IN A MANNER TO PREVENT EROSION. USE
TEMPORARY SLOPE DRAINS OR DIVERSIONS WITH OUTLET PR07ECTION TO DIVERT SEDIMENT
`q
LADEN WATER TO THE UPPER END OF THE POOL AREA TO IMPROVE BASIN TRAP EFFICIENCY.
9. EROSION CONTROL- CONSTRUCT THE STRUCTURE SO THAT THE DISTURBED AREA IS MINIMIZED,
DIVERT SURFACE WATER AWAY FROM BARE AREAS. COMPLETE THE EMBANKMENT BEFORE
FLOWCONTROL
GALVANIZED STL
THE AREA IS CLEARED. STABILIZE THE EMERGENCY SPILLWAY EMBANKMENT AND ALL OTHER
ORIFICE
STRAP TYPICAL
DISTURBED AREAS ABOVE THE CREST OF THE PRINCIPAL SPILLWAY IMMEDIATELY AFTER
CONSTRUCTION.
4-
° D. SCR. 4O
10. INSTALL POROUS BAFFLES AS INDICATED IN SEDIMENT BASIN BAFFLE DETAIL.
11. PRODUCING AREAS HAVE BEEN STABILIZED, REMOVE
THE STRUCTUREANDAN THE
THE AREA
THE AREA TO BLEND WITH THE
OTH THE
WING STABILUNSTAOLESEDIMEM.SMOOTH
ADJOINING AREAS AND STABILIZE PROPERLY,
SKIMMER
W PVC CAP
INFLUENT
-6
MAINTENANCE1
5-U'
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
SKIMMER PLAN
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
6° LD. SCH, 40
IT CAN BE EXCAVATED. EXCAVATE THE SEDIMENT FROM THE ENTIRE BASIN, HOT JUST AROUND THE
4°PVCVENT PVC PIPE FLOAT
SKIMMER OR THE FIRST CELL. MAKE SURE VEGETATION GROWING IN THE BOTTOM THE BASIN
DOES NOT HOLD DOWN THE SKIMMER.
REPAIR THE BAFFLES IF THEY ARE DAMAGED. RE -ANCHOR THE BAFFLES IF WATER IS FUNDS
UNDERNEATH OR AROUND THEM.
IF THE SKIMMER IS CLOGGED WITH TRASH AND THERE IS WATER IN THE BASIN, USUALLY JERKING
4° 22P BEND
ON THE ROPE WILL MAKE THE SKIMMER BOB UP AND DOWN AND DISLODGE THE DEBRIS AND
SP x HUB
RESTORE FLOW. IF THIS DOES NOT WORK, PULL THE SKIMMER OVER TO THE SIDE OF THE BASIN
4°PVC TEE
AND REMOVE THE DEBRIS. ALSO CHECK THE ORIFICE INSIDE THE SKIMMER TO SEE IF IT IS
HOSE
STNSTL. HOSE 4°xA-PVC TEE
STN.STLCLAMPS
CLOGGED; IF SO REMOVE THE DEBRIS,
4° PVC FLANGE
IF THE SKIMMER ARM OR BARREL PIPE IS CLOGGED, THE ORIFICE CAN BE REMOVED AND THE
4°FLEXIBLE
OBSTRUCTION CLEARED WITH A PLUMBERS SNAKE OR BY FLUSHING WIN WATER BE SURE AND
HOSE
REPLACE THE ORIFICE BEFORE REPOSITIONING THE SKIMMER,
3°LD.SC11. 40 nOWCOOTH ORIFICE
PVC PIPE CUT CI
CHECK THE FABRIC LINED SPILLWAY FOR DAMAGE AND MAKE ANY REQUIRED REPAIRS WITH
OPENING TO DIMENSION
INGTOHC DIMENSION
FABRIC THAT SPANS THE HULL WIDTH OF THE SPILLWAY. CHECK THE EMBANKMENT, SPILLWAYS,
INDICATED ON BASIN SITE
AND OUTLET FOR EROSION DAMAGE, AND INSPECT THE EMBANKMENT FOR PIPING AND
BASIN BOTTOM PLAN
SETTLEMENT. MAKE ALL NECESSARY REPAIRS IMMEDIATELY. REMOVE ALL TRASH AND OTHER
DEBRIS FROM THE SKIMMER AND POOL AREAS.
SKIMMER ELEVATION
FREEZING WEATHER CAN RESULT IN ICE FORMING IN THE BASIN. SOME SPECIAL PRECAUTIONS
SHOULD BE TAKEN IN THE WINTER TO PREVENT THE SKIMMER FRONT PLUGG114G WITH ICE,
Floating Surface Skimmer
1 'SEDIMENT BASIN AND SKIMMER
LaBeRa
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© 2019 LaBelle Associates
ALAMANCE
AGGREGATES,
rf Threatt, r
Snow Camp Mine
1
1/20/20
ADDITIONAL STREAM INFO - ALAM. AGE.
& LAND QUALITY COMMENTS
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2190335
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
CONSTRUCTION
DATE:
1 /23/20
DRAWING NAME:
WIM 1Wf
DETAILS
DRAWING NUMBER: