9-24-18_Alamance Mine Plans (2)

ALAP4ANCE
SHEETINDEX
COVER SHEET
C101 EXISTING CONDITIONS
C201 WNE MAP
C202 PLANT AND STOCKPILE
C203 WNE PLAN
C204 RECLAMATION PLAN
PLAN
QUARRY
& CONSTRUCTION
MATERIALS
342 CLARK ROAD
SNOW CAMP, NC 27349
ALAMANCE COUNTY, NC
ROSELLE RD
WORKMAN RD
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QUAKENBUSH RD
SITE
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OLD DAM RD
LOCATION MAP
SCALE: NTS
C301 OVERALL SEDWENTATION & EROSION CONTROL PLAN
C302 SKWMER BASIN GRADING
C303 ENTRANCE ROAD PLAN AND PROFILE
C304 DRAINAGE AREAS
COGS PARKING, STREAM CROSSING, ENTRANCE ROAD DETAJLS
C401 SITE DETAILS
C402 SITE DETAJLS
C403 SITE DETAILS
C501 EROSION AND
C502 EROSION AND
SITE DEVELOPER/OWNER
ALAMANCE AGGREGATES, LLC
PRELIMINARY NOT FOR
CONSTRUCTION
LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27106
SEDIMENT CONTROL DETAILS 336-842-4065
C#0430
SEDIMENT CONTROL DETAILS labellapc.com
PROJECT N0: 2180544

PID: 102700
SNOW CAMP BAPTIST CH
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PID: 102699
ROBERT L RUMLEY
PROPERTY L OFONEc EEK
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HOUSE
LOCATED 20V
FROM CENTER OF
OPERATION
PID: 102715
MICHAEL T FAIN
RO�.DY CL ENE/ F
OpFRT` �
PID: 10698
STEPHEN D MILLS
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PID: 102733
DANNY R STUART
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ERTY LINE/ PERMIT BOUNDARY
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PID: 102733
DANNY R STUART
J APPARENT/
TRA
/ EASEMEN
SION LINE
PID: 102799
PAMELA A CAUSEY REVOC TRUST
I �
PID:102748
i
HOUSE
LOCATED 2288'
/,EPROM CENTER OF
/ OPERATION
PID:102769
BRIAN J LEE
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PID: 102765
PID: 102768
PID:102767
PID:102772
HEATHER RATCLIFFE
r' �� OP r---HOUSE
I I LOCATED 2387'
BOO L---OPCENTER
RA O � C1
PID:102764
TIMOTHY J MULROONEY
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PID:102697 I \ /PID. 102747 m
NORMAN F JACKSON, Jf� C V POND
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PID: 102726 J PID:102762
L I DEBORAH A SANDERS
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\ HOUSE rvjl \
\ LOCATED 217S
FROM CENTER OF O n
OPERATION Of I
/ PID: 102771
OBERT A SAGETT
PID: 102770
WANDA W RAY
PID: 10,
HA SNOI
PID:102608
CHARLES J BYRD
GENERAL NOTES
1. EXISTING SITE FEATURES, TOPOGRAPHY, AND PROPERTY DATA FROM INFORMATION PROVIDED BY COE FORESTRY AND
SURVEYING. ALSO, SITE PLAN INFORMATION OBTAINED FROM DRAWING SEALED BY CHRISTOPHER FAULK, PLS DATED
1 /10/18.
2. OBTAIN ALL APPLICABLE PERMITS AND PLAN APPROVALS PRIOR TO BEGINNING WORK
3. CONTRACTOR IS RESPONSIBLE FOR VERIFYING ALL EXISTING FEATURES PRIOR TO START OF CONSTRUCTION. CALL 811.
ANY DISCREPANCY IN LOCATION, SIZE, OR DESCRIPTION OF EXISTING FEATURES SHOWN ON THE PLANS SHALL BE
BROUGHT TO THE ATTENTION OF THE ENGINEER IMMEDIATELY.
4. THE CONTRACTOR WILL BE REQUIRED TO DO ALL WORK NECESSARY TO PROVIDE SUITABLE CONNECTIONS WITH ALL
ROADS, STORM DRAINS, AND UTILITIES ENTERING THIS PROJECT.
5. NO SUBSURFACE INVESTIGATIONS OF DETERMINATION HAS BEEN MADE BY THE ENGINEER. THE CONTRACTOR SHOULD
MAKE HIS OWN INVESTIGATION AS TO THE SUBSURFACE CONDITIONS.
6. CONTRACTOR SHALL BE RESPONSIBLE FOR LOCATING, RELOCATING, AVOIDING, AND PROTECTING ALL EXISTING UTILITIES
AND FEATURES ON SITE.
7. PRIOR TO FINAL ACCEPTANCE THE CONTRACTOR SHALL ULTIMATELY BE RESPONSIBLE FOR CORRECTING OR SEEING TO
THE CORRECTION OF ALL PROBLEMS ASSOCIATED WITH THE PROJECT. INCLUDING THOSE ITEMS NOT NECESSARILY
COVERED BY THE PLANS, TO ENSURE THE SATISFACTORY COMPLETION OF THE TOTAL PROJECT.
8. CONTRACTOR SHALL BE RESPONSIBLE FOR THE COORDINATION OF THE REMOVAL AND/OR RELOCATION OF ANY EXISTING
UTILITY POLES, GUY WIRES, AND/OR ANY OTHER EXISTING FEATURES AS REQUIRED.
9. CONTRACTOR MUST CONSTRUCT ALL WORK UNDER THE SUPERVISION OF A QUALIFIED GEOTECHNICAL FIRM.
10. ALL WORKMANSHIP AND MATERIALS TO CONFORM WITH NCDOT SPECIFICATIONS AND DRAWINGS UNLESS OTHERWISE
NOTED.
LLI �
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ORALPH W BLAND
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LEGEND
PROPERTY LINE
— —
EXISTING BUILDING
r-1
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PROPOSED BUILDING
ED
EXISTING MAJOR CONTOURS
EXISTING MINOR CONTOURS
125 0 125 250 375 500'
V = 250'
UZILaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F
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© 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
EXISTING CONDITIONS
DRAWING NUMBER:
C101

LaBeLLa
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'�u I \ \ / I� \ X �� PROPERTY LINE
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WPAA�sExti��zus EXISTING BUILDING
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PROPOSED BUILDING
D / I \ \\ \ ERM OPERATIONOF
/ / \ /— / MINE PERIMETER
PID:102769 / ' / \ / / > ) J 1 / —J
BRIAN J LEE I / / 102712 PROPOSED SECURITY FENCE x— x— x— x
P(J (\ 1 HEATHER RATCLIFFE/—
��� P ERT L lTMLE \e0�, 50' UNDISTURBED BUFFER
/ �\� 100 STRUCTURE SETBACK BUFFER
FFER � I / / ' -i' 'S' J /
U \ I NL� 1 \ L- / I \ �� // ( /
� PID:�ia I \ �/ / 125' OPERATIONS SETBACK BUFFER
I I u BED�TOCKPI PL N eu �� \ R� � / � 1 J �
I / PT74N4�C �I o,PID: 102 71 \ \ PROPOSED SKIMMER BASIN e
ROBERT A SAG —�
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DISiUR8�1 \ LIMITS � � / ��� / G �
1 LIMIT
IT I OOR / POND /
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/ ID. 698 I 1 I i /�
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STEP
D iwlL I ( 1 \\� /j-�j ,� 1 I W ��1 �Z� C CATEGORY APPROXIMATE IMPACT
'XI
L, �\ - - a a Q ACRES
X//( d I / p W \ aAL�w�Aral� \ ` TAILING/SEDIMENT PONDS 3.60
y �/ \ (ISOLATED— —t:'�l 027s STOCKPILE 23.26
LAND I �I 1 r ) \-\�-
II 5._0 / ) )\\ WASTEPILES 20.51
/ UN SSTUVI R D I I L_/ \ J "/ ^' —� \� �\\\ \ _i \ I
I ( \ \ \ \ \ \ / �BUF r \ \ / / PROCESSING/HAUL ROAD 6.18
� \ Q - - / � /
I EfC�ND,K� 8 7 // ��
NOTES FROM SITE PLAN SEALED � � I 2 NoUILD G\„T _ W \ / ERM 2 I \ Q J \ // / MINE EXCAVATION 29.40
BY CHRISTOPHER FAULK, EL ON 1 /10/18. Q e G Ego -�� Q / �� xX O r- HOUSE \ /
- PROPOSED IMPERVIOUS AREA = 5.0 % \c;\ I WETLAt��A �\ \ / / I %�� I LOCATED
z
r� \ OTHER (ACCESS ROAD) 0
L--J Q,,, TER OF
PONDS TO BE FILLED ONLY WITH NCDEQ APPROVAL �� _ ) 1 / \ ` `O f p10N /I�\ TOTAL IMPACT 82.95
PER 401 / 404 PERMITTING / f /
- AREA OF OPERATIONS IS BUFFERED A MINIMUM OF
125' FROM PROPERTY LINES �� I �'�� � / / \ \l PID:102�s4I
- TEMPORARY LIGHTING WILL BE USED FOR ANY REQUIRED - \ \ Ff€�� \ \ EXiSTIN l50' / �- / / ��y nMOTHY J Mu o
_\` \\ \ _\ UNDISTURBED �� �
NIGHT OPERATIONS 1 D' B S �, STR M BUFFS % ��` / \ / MINING LIMITS
- FINAL DESIGN AND PLACEMENT OF STORMWATER CONTROL I / 50 I NG I C ✓ \ /� Q- ��j, '� 1 \ \ \ \ \\\ \
UNDI �BED LI ITS
DEVICES TO BE CONFIRMED BY APPROVED SEDIMENT AND -� //� g ��= \ BUFFER
EROSION CONTROL PLAN /� \\ //�/uNIJAj WNfl BB \ / / — = \ / I I I 1 OVERBURDEN SLOPE 2:1
- BERMS TO BE CONSTRUCTED 8' +/- HIGH AND PLANTED \ j / B \ / ^ I �_ MINING LIMITS 8 H x 50 W BERM
WITH LOBLOLLY PINE g2ss7 z I B PID: 102747 ` / I �� / / / / — EXISTING GROUND_ SEE BERM DETAIL 2
f� V / 0 0 ` _\ '� \ / / 20' SAFETY BENCH _
LOBLOLLY PINES TO BE "DOUBLE -STAGGER" PLANTED PER A F ACK RC�PO E / /1NEfLf�N ?` ~ �- \\ �_
SCREENING GUIDLINES DESCRIBED IN ALAMANCE COUNTY
ORDINANCE SSIN \ / ��C / �\ ✓ - \\ APPROXIMATE WATER LEVEL AFTER RECLAMATION
- ALL VEGETATIVE SCREENING MUST BE VERIFIED BY VISUAL -� \\ / \ VARIES
/ l I I / / PROPOD 1\ �i� �"z-�\ \1� \ \ / / / ` i ���� / (50' MAX)
INSPECTION PRIOR TO ISSUANCE OF AN OPERATIONS PERMIT I OFF ROAD ���� /\` / BUDIST REED
FOR THE FACILITY. PLEASE CALL 336zp
-570-5053 TO / \\ PI�27 / /��- \ I LU Jam\ \ I I /
1 VARIES
SCHEDULE AN INSPECTION. 1\ ( i� J ROE PL�EX % 1 r \ \ ✓ / I) II III PI o n 62 sAn16ERs / ��- �J /
\ g / / / I ��'// l I I ��— (50' MAX)
INTENT -TO -CONSTRUCT PERMITS ARE VALID FOR (1) YEAR w N / eTi °' EEo" OPOSED / c �_ J HAUL ROAD
FROM THE DATE OF ISSUANCE. \ \ I ° z / K14G, `_��/ ��j ` / // �/
- TWO (2) COPIES OF A POST DEVELOPMENT/ASBUILT PLAN \ \ F w / I� \ j /� / / / ���, �j/ I I \i `/ / �j (50 )
ARE REQUIRED TO BE FILED WITH THE ALAMANCE COUNTY \\ \ / I \\ \ / �� L
PLANNING DEPARTMENT AT THE COMPLETION OF CONSTRUCTION \ 1 o J / / \ 9 A� I _� \ ��/
AND PRIOR TO ISSUANCE OF AN OPERATIONS PERMIT. HOUS� R 1 / I �c UrTfiR / 0 1 \ // i VARIES H 1 V SLOPE
AN OPERATIONS PERMIT WILL BE REQUIRED PRIOR TO BEGINNING +I ( \� / / \ / /y p \\\\ / �� 270'-332' �15' BENCH
00 I \ / / 1 f / / \ TYP.
OPERATION OF THE FACILITY. PLEASE CALL 336 570 4053 \ I /\ I/ O //�� \ �- / I G )
FOR ADDITIONAL INFORMATION.
- OPERATIONS PERMITS ARE VALID FOR THREE (3) YEARS. � � ( \���((
PLEASE CONTACT THE ALAMANCE COUNTY PLANNING ( J \ \ �� J I I, I 1
DEPARTMENT AT 336-570-4053 TO RENEW THIS PERMIT`L�,��o
PRIOR TO EXPIRATION. \ ( l \\ ✓ '��
- LIGHTING TO BE INSTALLED PER LIGHTING PLAN DETAIL I \ \ -- PID: ,625 PIT FLOOR
SUBMITTED WITH SITE PLAN ( I 1 II ( / / / % I I �� I / / / // (VARIES IN WIDTH)
- ACCESS WAYS, WALKWAYS AND PARKING AREAS SHALL
BE LIGHTED ADEQUATELY BY LIGHTING FIXTURES WHICH 1 IDI I (/ �/
SHALL BE SO INSTALLED AS TO PROTECT THE STREET 1 \I HA s 17CAM�, L \ P IN RE \ \ �� / � \ �� ID 1 s\ \ I I MINING AREA SECTION "A -A"
�� \ I I I
AND NEIGHBORING PROPERTIES FROM DIRECT GLARE OR \\` \� T" END
"V"A B SCALE. 1 "-100'
HAZARDOUS INTERFERENCE OF ANY KIND. APPLICANTS\\� \�
\ 18" RCP
ARE ENCOURAGED TO USE LIGHT SHIELDING AND FIXTURES `\�) > >�� , FRj Allq �THAT ARE /
ASSOCIATIONP(IIDA) ASY THE THESE FIXTURESNAL ENERGY, �( �� K SKY� �> TI�A E sFo tiq�oN �� ��� // /�c /Q oo/S
( ) \ \ / "Ri �'q� Sc� // ACK 18
REDUCE MONTHLY COSTS, AND MINIMIZE THE IMPACT OF _ J I ( ��qc� / // 2 o J / � I I �J I ( ) I BERM
LIGHT POLLUTION ON SURROUNDING PROPERTIES. \ I I 1 C ( \ Now TqT/ J / / Qj� J l/ / / / / / \ I I / /�— �� ) ` 1 / (/ BERM SLOPE 2H:1 V
(HIDO SECTION 4, ITEM 1) \ \ i °N �o / // / / / / ✓ I / \
125' OPERATIONAL SETBACK TO INCLUDE 50' SCREENING
R 81
BUFFER REQUIRED BY HIDO SECTION 4 ITEM G. NATURAL PID: 102 /
VEGETATION TO BE SUPPLEMENTED AS DESCRIBED IN HIDO \\ �� \ \ oJ` I / / �IeMAs�MR oTT �� \ \ \ �/ / / / 50 WIDE
~ \\ a �' k �u // /�i I 1 / \\\ ���� AT BASE
APPENDIX "A" PER SUBMITTED SCREENING PLAN SUBJECT TO o 4l ? / O /
- APPROVAL OF PLANNING DIRECTOR \ \ �/ I �` / \ \y JI J / / / f I // �/ % % J I I f I / ��/� j SEE DETAIL 2/403 FOR ADDITIONAL
STRUCTURES NOT TO EXCEED 40' IN HEIGHT ABOVE NATURAL \ \ J I �� \ �`\ / / I \ / / I / ��// INFORMATION
ELEVATION GRADE PER HIDO SECTION 4 ITEM B \ J �d �� / / \� /� BERM 1 DETAIL
- BUILDING ON PID #102726 TO BE REMOVED SUBJECT TO \ / \\ \ \ J / \ / / / \ �- � NOT TO SCALE
PROPER DEMOLITION PERMITS \ \ \
h
- FINAL APPROVAL AND OPERATION PERMITS WILL BE / \
CONTIGENT UPON RECIEPT OF FINAL STATE AND FEDERAL - 1
- APPROVALS I 1 \ \ \ / /IS KINSEY
HISTORIC PROPERTIES TO REMAIN OR MADE AVAILABLE AMANDA IVEYvooD/ �, s / I -� �// / I
� � � ) / / / R oN'�' e � � / 1 0 �O�Y ��50 600 �
FOR RELOCATION UPON CONSULTATION WITH HISTORICAL J I 1 Sry Rq�tiy \ \ J / I \ \ \ \ I I Z
PROPERTIES COMMISSION
BERM SLOPE 2H.1 V
N BERM
OVERBURDEN
SLOPE 2H:1 V 8' TALL
50' WIDE
SEE DETAIL 2/403 FOR ADDITIONAL
INFORMATION
MINE BERM DETAIL 2
NOT TO SCALE
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F T
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© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NUMBER:
MINE MAP
201

LaBeLLa
Powered by partnership.
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/I SKIMMER BASIN #8 �"" ♦\ \ \\ / \ \ \ \ \ \
( BASIN #�y \ ♦ + \ \ \ � / \— —� \♦\ \\1 � I / \ \ \ � \ \ \
\ \ \ \ \ \ \ _
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NCDOT STEEL / NN ♦ \ \ \�\ C\� �%� \ \
BEAM GUARDRAIL I / '`
160 LF (5' OFF E.P.) ♦ / \ \ \ \ \ \ X—X—� ♦ \ \\ ` \ \
\ \\ ♦ \ , �^ / / / / / / �/+ / +♦ iO SKIMMER BASIN #1\ \ \
.SKIMMER BASIN #4 \ ♦ \ \ � , ��\ \ / / / �/ / � ` \ \ \\ � \ \ \
00,
\ i \ �� I" / / �\ I I Ir I 1 / / ♦ �I ,I / //�j �/ / ' / SKIMMER BASIN #12 \ \ \ \\ \ \ \
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— \ / / I �\Y V— \ \\,' !� SKIMMER SIN #2 \
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too 10
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WATER ELEVATION (WE) — 594 / I \
BOTTOM — 579'
\ \
INING
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50 0 50 100 150 200
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615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
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© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
N0: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
PLANT AND
STOCKPILE PLAN
DRAWING NUMBER:
202

PROPOSED
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PROPERTY LINE
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EXISTING BUILDING
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MINE PERIMETER
PROPOSED SECURITY FENCE x—x—x—x
50' UNDISTURBED BUFFER — — — —
— — — — — — — — — — —
100' STRUCTURE SETBACK BUFFER - - - -
- - - - - - - - - - - -
125' OPERATIONS SETBACK BUFFER
PROPOSED SKIMMER BASIN
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LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
� T
0� F��GoN
� T -1
© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
N0:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE.
9/24/18
DRAWING NAME
DRAWING NUMBER:
MINE PLAN
203

LaBeLLa
Powered by partnership.
PID: 102715
MICHAEL T FAIN
PROPERTY L NE�F REEK
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5
APPq
PID: 102733 ENT GAS LINE
DANNY R STUART EASEMENT '
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I 125' OPE I N
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XPID: 102700 X_ MI NARY
SNOW CAMP BAPTIST CH I —`=50� / �/ X PERIME URITy
TER SEC
Y
OVERBURDERN SOIL 3
STOCKPILE AREAS
GRADED AND -
SEEDED Q /
PID: 102699
ROBERT L RUMLEY
PROPERTY NEB FE EEK -
MIT 8
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HOUSE L_J
LOCATED 20V
FROM CENTER OF
OPERATION
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PID: 102579 \ \
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EEDED
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PID: 102733
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LOCATED 2268'
HERON CENTER OF
Q / �oPERATIaR
PID:102769
BRIAN J LEE
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so,G�,��
PID:102748 \ + 401
\ PID: 102747
C pOND
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PID: 102726
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VEGETATIVE BUFFER
PID: 102598
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PID: 102768
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PID:102772
HEATHER RATCLIFFE
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ROBERT A SAGETT
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TIMOTHY J MULROONEY
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THOMAS MCDERMOTT
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DEBORAH A SANDERS
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CHARLES J BYRD
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a O RALPH W BLAND
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150 0 150 300 450 600
1" = 300'
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
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© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
DATE:
DESCRIPTION:
LV'
ISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
RECLAMATION PLAN
DRAWING NUMBER:
204

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LEGEND
EXISTING PROPERTY LINE
- -
EXISTING PROPERTY LINE
- -
PROPOSED BUILDING
r
L_J
PROPOSED BUILDING
E]
MINE PERIMETER
PROPOSED SECURITY FENCE x-
x x x
TEMPORARY DIVERSION DITCH
TD>-
TEMPORARY SILT FENCE
PROPOSED ENERGY DISSIPATOR
TEMPORARY CHECK DAM
•
SKIMMER BASIN #2
/­7 \ DISTURBANCE / / 1 �\
PERIMETER SECURITY l ' �/
\\ FENCE TO CLEAR SPAN SKIMMER BASIN #3
JURISDICTIONAL AREA SKIMMER BASIN #1 `
STONE OUTLET (TYP.)
SEE DETAIL 7/C502 �\ 1
LIMITS OF \
SKIMMER BASIN #12//" \ DISTURBANCE
CONTRACTOR TO PROVIDE CURLEX I \\ TEMP. SEDIMENT I I
STONE OUTLET I TYP.) / / / / EXCELSIOR MATTING ACROSS THE \\\ , FENCE (TYP.) f
SEE DETAIL 7/C502 ENTIRE LENGTH & WIDTH OF ALL \\\\ SEE DETAIL 2/C501 \\��
/ f SLOPES 3H:1V AND STEEPER
STONE OUTLET (TYP.)
SEE DETAIL 7/C502
DISTURBANCE 1 / PERIMETER SECURITY -
\ FENCE TO CLEAR SPAN
C17 / � JURISDICTIONAL AREA
\ 9 ` LIMITS OF
rn o "1 I DISTURBANCE I I \
TAILINGS POND 1 -�, I \^ \
�rn �-► ►\� �m _ # I `gyp
TEMP. SEDIMENT \� �\ /� 0 \\o / 500'x100
FENCE (TYP.) LIMITS OFF'` -
SEE DETAIL 2/C501 2
I. TAILINGS POND
DISTURBANCE (n i\ LO o #
LIMITS OF \ SKIMMER BASIN #8 \ LIMITS OF
DISTURBANCE �/_ �� DISTURBANCE
Ott 0
SKIMMER BASIN
BUFF UNDISTURBED
< <
�1G
/x ��� - ��\ LIMITS OF �\
LIMITS OF
I / E LIMITS OF, \ /
I DISTURBANCE _
1)� / TEMP. SEDIMENT90 ) r NPIJ`T' /DISTURBANCE ^ _ \� / / 2� j 1 / / 1 1 1 v` _ \\
l lj/ FENCE (TYP.) I I R / / / SKIMMER BASIN #13
SEE DETAIL 2/C501
ROO N\ \ ` ///
17, / / / \
_ � SKIMMER BASIN #5 / N ^ ` SKIMMER BASIN #1
TEMP. SEDIMENT
/ \ FENCE (TYP.)
r \\ \ \ /
I / / SEE DETAIL 2/C501 \ `� �� �.lj \ I \ \ �"
\
SKIMMER BASIN #4 TEMPORARY DIVERSION
TOTAL DISTURBED AREA = 83.52 ACRES
EROSION CONTROL SEQUENCE NOTES
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 NECESSARY TO 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.
DESCRIPTION
STABILIZATION
STABILIZATION
TIMEFRAME
TIMEFRAME
EXCEPTIONS
PERMANENT DIKES,
SWALES, DITCHES, &
7 DAYS
NONE
SLOPES
SLOPES STEEPER THAN
7 DAYS
IF SLOPESARE 10' OR LESS IN
31
LENGTH & ARE NOT STEEPER
THAN 2:1, 14 DAYS ALLOWED
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
STONE OUTLET (TYP.) ( /� -�\ \ \ \ DITCH (TYP.)
0 SEE DETAIL 7 C502 SEE DETAIL 3/C502 50 UNDISTURBED J6� r
/ BUFF
/ / EW 2 ♦ / / / / // / / /// ` I / -\ J 7. PRIOR TO THE CONTRACTOR DEMOBILIZING FROM THE SITE (AT APPROXIMATELY 45 DAYS PRIOR TO
STREAM CROSSING , / / / / / / / / �� I / / / / -, \
/ / / / / I I ` / / - \ DEMOBILIZATION), THE FINANCIAL RESPONSIBLE PARTY (OR THEIR DESIGNEE) WILL NOTIFY THE ENGINEER AND THE
/ // 1 AN ON -SITE
INSPECTION WILL
DESIGNATED EROSION ECONDUCTED PRIOR 0 HECONTROL INSPECTOR OF T LEAVE DATEHEIR BYTTHE ENGINEER AND/OR THE ED DATE TO LEAVE THE EDESIGNATED EROSION
LIMITS OF. � \ \ � / / � / � / � -
/ \ .� / I CONTROL INSPECTOR TO MAKE CERTAIN ALL ACTIONS ITEMS HAVE BEEN ADDRESSED BY THE CONTRACTOR.
DISTURBANCE -� \ �// _ I /` // /� I I / / // / /� l
STONE OUTLET (TYP.) /
SEE DETAIL 7/C502 1, COTINUE TO VER HS BEEN ESTABLIS
OVER ALL DISTURBED AAR AREAS AND SMOTE HAS BEOEN STABILIZED. REMOVE EROSION CL MEASURES UNTIL VEGETATIVE OONTROL MEASURES ON YHED
SKIMMER BASIN #6 \ / _ \ I �j / \ \ ` \ \ / / ' / / / AFTER FINAL INSPECTION AND APPROVAL BY ENGINEER.
/ \ \ 50' UNDISTURBED
EW 1 J \ \ 1 \' d \ \ \ ♦ / EROSION CONTROL MAINTENANCE PLAN (CONTRACTOR MUST INCLUDE MAINTENANCE IN BASE BID)
` 1 LIMITS OF 4�- I V \ \ \ �\ / BUFF i ERM i \ _ / / / / 1. INSPECT ALL SEDIMENTATION AND EROSION CONTROL DEVICES FOR STABILITY AND FUNCTION EACH WEEK
_DISTURBANCE \� \\\ \ / _ -MINING \ IMITS \ \\ / A �/ / I \ \ // / AND FOLLOWING EACH RAINFALL EVENT.
2. REMOVE SILT/ SEDIMENT FROM TEMPORARY DEVICES WHEN ACCUMULATED VOLUME HAS REACHED 50%
SKIMMER BASIN #7\/TEMP. SEDIMENT / ;� / CAPACITY.
*_/ = FENCE (TYP.)
LIMITS OF ~- / \ I i , / / // / SEE DETAIL 2/C501 / / / \ / �i 3. REMOVED ACCUMULATED SILT/SEDIMENT FROM BEHIND TEMPORARY SEDIMENT FENCE WHEN DEPTH
\ / < o \ LIMITS OF
DISTURBANCE \ \ r I DISTURBANCE \ \\ / / j / EXCEEDS APPROXIMATELY 0.5'. REPAIR AND REPLACE SILT FENCE AS NECESSARY.
yc �� I 4. SEED AND STABILIZE TEMPORARY DIVERSION BERMS IMMEDIATELY AFTER CONSTRUCTION INCLUDING
\ ` f \ J J l LIMITS OF ,(� "CLEAN" WATER DIVERSION BERMS. RE-GRADE/REPAIR BERMS AS REQUIRED.
�/ \ \ \ \\ / / / I \ DISTURBANCE
�
5. CONTRACTOR SHALL APPOINT AN ON -SITE INSPECTOR AND MAINTAIN RECORDS OF INSPECTIONS IN
ACCORDANCE WITH THE PROVISION F THE GENERAL NPDE T RMWATER DISCHARGE PERMIT F R
\l CONSTRUCTION ACTIVITIES.
o j 0 G S S O0
DISTLIMITS URBANCE f ` S \ \ \ TEMP. CHECK DAM FENCE (TyP� ENT
\ , 1 (�P') I I I \� 1 SEE DETAIL 2 C501
\ \ f SEE DETAIL 4/C501 /
/
\ END 2\ ` ./'/ I � � �, � l � / / \ \ � � � \ A O \�, DETAILED CONSTRUCTION SEQUENCE
Ix / I LIMITS OF �/ / \ _� _� / / �- \ l ( / \ x ' 1 �y �� \� 1. CONSTRUCT THE TEMPORARY SURGE STONE CONSTRUCTION ENTRANCE/EXIT OFF CLARK ROAD.
- /' J J I DISTURBANCE \��\
2. INSTALL SILT FENCE AND STONE OUTLETS FROM CLARK ROAD TO THE SOUTH SIDE OF THE STREAM
f' TEMPORARY / / J / \ n % / \ ✓ 9 \ ( LOCATED AT 16+87. SILT FENCE TO BE LOCATED ON BOTH SIDES OF THE ROAD AND SOUTH BANKS OF
/ / / / \/ �' \ SO, \ / , P \ \ \ \ \L \ \ ( THE STREAM.
/ CONSTRUCTION ( f \ C' STR� ! �j 00,
\\ \ \ 1 \ \\
ENTRANCE/EXIT J ` ^� M 9(7F '�0000
STONE OUTLET TYP.
END 1 / / / �/ \ I FER �\ SEE DETAIL 7/C502 ) 3. INSTALL SKIMMER BASIN 6 AND SKIMMER BASIN 7 AND THEIR ASSOCIATED TEMPORARY DIVERSION
M STONE PIPE INLET ( \ >/ �- 1 ' LIMITS OF 1 I - -� / \ j DITCHES AND SLOPE DRAIN (IF CALLED FOR).
m PROTECTION / / I \ �J \ \ \ \ \ /\_ i / \ DISTURBANCE \ ,� - / - /��-- �� \ \ G�
4 INSTALL IMPERVIOUS CLEAN WATER DIKE AND BYPASS PUMPING SYSTEM AS SHOWN ON SHEET C402
� )
I
x (l \ r \ \� \ \) _ - . TEMP. SEDIMENT / �/ i" �� / x r <°o 3\ \\ INSTALL THE PERMANENT 54" PIPE AND ENDWALLS AT STATION 16+87.
W \ \ \ \ \ // / FENCE (TYP.) \ i °� y O \ \
M /n / I \ \ �� �\ L - 1- - - ��� SEE DETAIL 2/C501°q G \
r �I \ \ I \ -/ / \ / / y L-- J Fp �� 5. APPLY 10" STONE BASE LAYER TO ENTRANCE ROAD AND COMPACT.
x A9�0 O \\
6. BACKFILL, PREPARE SLOPES AND OTHER DISTURBED AREAS AND STABILIZE.
I I D \ \ \ ( \ �° 7. INSTALL SILT FENCE AND STONE OUTLETS ALONG NORTH SIDE OF THE STREAM.
\ \ \ \ 1 I
8. INSTALL SILT FENCE AND STONE OUTLETS AROUND THE EXISTING STREAM BUFFER AND PROPERTY
BOUNDARY (WHERE DENOTED ON PLANS). INSTALL SKIMMER BASINS 4, 5, 13, 11, 3, 2, 1, 12, 8, AND
O �S /C x CO
p G 1 \ O. \ \ \ \ \ \ \ \ \ \ RF \ \ J �(/� 1 C 10 AND THEIR ASSOCIATED TEMPORARY DIVERSION DITCHES AND SLOPE DRAINS (IF CALLED FOR).
1 \
I fTl r' \ \ \ \ \ \ \ \ \ 00, x 9. PLACE ALL SILT FENCE AND STONE OUTLETS DOWN SLOPE OF ALL PROPOSED BERMS.
�-5]x 0 10. BEGIN GRADING THE INITIAL MINE AREA, MOVE AND PLACE MATERIAL FOR BERMS. PLACE AND
x p / COMPACT MATERIAL FOR PLANT AND STOCKPILE AREA. ALL BERMS SHALL BE CONSTRUCTED AND
I I \\ \\ \ \ �'4 \ J / / / J 1�F \ _ f ���\ 9� / STABILIZED WITHIN 1 YEAR OF STARTING MINING ACTIVITIES.
I -1 ,j�j \\ -� (/1 \ _ ��� 11. CONSTRUCT TAILINGS PONDS BEFORE MINING OPERATION BEINGS.
Cn
G) 1 /� \ \\ l \\\\\ \ / / / / / _-� �\ \ \ 12. SEED AND MULCH ALL AREAS THAT ARE NOT COVERED WITH ASPHALT OR STONE.
�� 13. STABILIZE ALL CHANNELS AND SLOPES WITH MATTING AS NOTED ON THE PLANS.
i STORM DESIGN IS BASED ON I = 6.37 INCHES/HOUR FOR TIME OF CONCENTRATION (TOC) =9.19 Minutes for 54" Culvert \ ss \ \ j
�x STORMWATER SEWER CALCULATIONS AND DESIGN TABLE
ISTORM RETURN PERIOD: 25 YR.for 54" Culvert, 10 Yr for entrance pipe at Clark Road i TOC=5 Minutes \ \ \ \ \ \\ OAF
x
\ 9
I I� /
REINFORCED CONCRETE PIPE (RCP) TO BE CLASS III, O-RING JOINTS (WATERTIGHT) ASTM C443; PIPE INSTALLATION ASTM C1479 \ � �<
ENDWALLS (EW) TO BE NCDOT STD. 838.21 ��°y °yy
/ FLARED END SECTION (FES) \ °F°°�,C's %\ / \ / / / \ / �\ \ )00
OA
I
11 F: Ac - - I
TYPE
INLET
INLET
TOTAL
GRATE/
FROM
TO
APPROY_
PIPE
GRATE
AREA
Q
AREA
I
C
Q
RIM/
INV.
INV.
LENGTH
SLOPE
N
D(THEO.)
SIZE
PIPE
RIM
FROM
TO
(Ac.)
CFS
(Ac.)
(in/hr)
CFS
THROAT
(ft)
(ft)
00
%
(inches)
(inches)
MATERIAL
N/A
EW I
EW 2
61.07
80.61
61.070
6.37
0.33
128.38
N/A
595.52
593.57
80.00
2.44
0.013
38.90
54
RCP
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
LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
� T -1
© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
N0: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
OVERALL
SEDIMENTATION &
EROSION CONTROL
PLAN
DRAWING NUMBER:
C301

/ J SKIM ER BASIN #1 I /
TEMP /
ISEDIMENT k /
I I FENCE
I I
k
POROUS /
BAFFLES
\ (TYP.)
FLOATING u�
SKIMMER BASIN #1 SKIMMER
30TTOM BASIN ELEVATION: 564.00
WATER LEVEL ELEVATION: 567.50 k
TOP DAM ELEVATION: 569.00
TOP DAM WIDTH: 5' `
WEIR LENGTH: 10'
MIN SURFACE AREA: 3114 FT2
MIN VOLUME: 7002 FT3 \ \
3RIFICE DIA.: 1.5"
SKIMMER SIZE: 2"
� 1
1
I
I
I
I
I
10 WEI \ \
STO E 0 TLET
\\
I STONE OUTLET- - - _ _ _,L_ _
(TYP.�
\ SKIM Eg_
x-SKIMMER BASIN #3_
14'x X-x-
cn I alb
o
/
\ \ k\k / I /
\ \A' i
SKIMMER BASIN #2 \ / SKIMMER BASIN #3 /
BOTTOM BASIN ELEVATION: 571.00 -� BOTTOM BASIN ELEVATION: 572.00
WATER LEVEL ELEVATION: 574.50 WATER LEVEL ELEVATION: 575.50 /
TOP DAM ELEVATION: 576.00 \ x TOP DAM ELEVATION: 577.0
TOP DAM WIDTH: 5' I / TOP DAM WIDTH: 5' /
WEIR LENGTH: 10' WEIR LENGTH: 14'
MIN SURFACE AREA: 2779 FT2 -_ x MIN SURFACE AREA: 4622 FT2 /
MIN VOLUME: 6246 FT3 MIN VOLUME: 10386 FT3
ORIFICE DIA.: 1.5" 1"=50' ORIFICE DIA.: 1.75"
SKIMMER SIZE: 2" SKIMMER SIZE: 3"
KIMME BASIN #2
ATING
KIMMER
i
574 ,
\ 575 /
10' WEIR
POROUS
BAFFtEZ,
\ (TYP.)
POR019
BALES
I I
I
SKIMMER BASIN #4 _ / / /
POROUS
BAFFLES / �IP
\ (n� SERIMEIyT-'
\ FE�PE
FL
S OMMINC / STOP ) OUTLET
Y
SKIMMER BASIN #4 - �)
BOTTOM BASIN ELEVATION: 609.00
WATER LEVEL ELEVATION: 612.50 N ,
TOP DAM ELEVATION: 614.00
TOP DAM WIDTH: 5'
WEIR LENGTH: 14' /
MIN SURFACE AREA: 4140 FT / , 14' EIR I
MIN VOLUME: 10953 FT3
SKIMMERISIZE:4"
1 =50' 1 "=50'
\
/ 1> _ _ _ _l - -/ TEMP / STONE OUTLET
STO UTLET / SEDIMENT - _ _ _ / (TYP.) \k
\ SKIMMER BASIN #8
FENCE � � / T MP STONE OUTLET k _
EDIMENT (TYP.) \ \
n,
SKIMMER BASIN #5 - - / / / o ENCE k\k`
-,� SKIMMER BASIN #6 / _
8' WEIR
ORO \�
AFFLES 610. FLOATING \k\�
8 SKIMMER SEDIMENT
8' WEIR - 611 '0 - FEE
/ FLOATING / / / / / - \
SKIMMER F DICE T / / / FLOATING - 610 \
SKIMMER BASIN #6 / FLOATING SKIMMER BASIN #7 SKIMMER SKIMMER BASIN #8
SKIMMER BASIN #5 / SKIMMER - -BOTTOM BASIN ELEVATION: 607.00
BOTTOM BASIN ELEVATION: 604.00 BOTTOM BASIN ELEVATION: 604.00
BOTTOM BASIN ELEVATION: 597.00 WATER LEVEL ELEVATION: 607.50 / WATER LEVEL ELEVATION: 607.50 WATER LEVEL ELEVATION: 610.50
WATER LEVEL ELEVATION: 600.50 x / $ \ TOP DAM ELEVATION: 611.00
TOP DAM ELEVATION: 602.00 I TOP DAM ELEVATION: 609.00 TOP DAM ELEVATION: 609.00
TOP DAM WIDTH: 5' �TOi l�E OUTLET TOP DAM WIDTH: 5' TOP DAM WIDTH: 5' - TOP DAM WIDTH: 5'
I POROUS POjQlJS WEIR LENGTH: 8'
WEIR LENGTH: 6' (TYP.) � WEIR LENGTH: 6' WEIR LENGTH: 8' �
�) 2 BAFFLES 2 BAFFLES '� MIN SURFACE AREA: 2298 FT2
MIN SURFACE AREA: 1690 FT2 _ _ - _ _ _ � MIN SURFACE AREA: 1800 FT MIN SURFACE AREA: 2275 FT
MINSURFAC SURFACE
: 3667 / _ \ - _BN MIN VOLUME: 4079 FT' (TYP.) MIN VOLUME: 5461Fr' (n'P) SKIMMER BAS MIN VOLUME: 5166 FT'
ORIFICE D
ORIFICE DIA.: 1.25" - - ORIFICE DIA.: 1.25" ORIFICE DIA.: 1.25"
SKIMMER SIZE: 1.5" SKIMMER SIZE: 1.5" 1"=50' SKIMMER SIZE: 3" 1 SKIMMER ISIZE: 25
BASIN #10
(SKIMMER
\
x
I x
\
x
4' WEIR
��
x STD
-
\
P OUP -
BAFFLES
Faso
TYP.) �
�
x
FLOATING _
SKIM
\
x
,
STONE i
0 LET
i \SEDIMENT
x (.)
i FENCE
\
x
/-
SKIMMER BASIN #10
BOTTOM BASIN ELEVATION: 590.00
WATER LEVEL ELEVATION: 593.50
TOP DAM ELEVATION: 595.00
TOP DAM WIDTH: 5'
WEIR LENGTH: 4'
MIN SURFACE AREA: 761 FT2
MIN VOLUME: 1710 FT3
ORIFICE DIA.: 0.75"
SKIMMER SIZE: 2"
C0
Cz
Cl)
/
A /-
STONE
_
OUTLET
MID.)
I /
159
\ /
POROUS
BALES
TYP.)
I
\
I
/
SEDIMENT
iENCEI
\
\
III
SKIMMER BASIN #13
BOTTOM BASIN ELEVATION: 592.00
WATER LEVEL ELEVATION: 595.50
TOP DAM ELEVATION: 597.00
TOP DAM WIDTH: 12'
WEIR LENGTH: 12'
MIN SURFACE AREA: 3735 FT2
MIN VOLUME: 9787 FT3
ORIFICE DIA.: 1.5"
SKIMMER SIZE: 2"
- � I
\ I
12' WEIR FLOATING
SKIMMER
6� \
SKIMMER BASIN #12TD FLOATING
/ \
� / SKIMMER \
V V C Tp
7D
�OROU'S \ \
BAFFLES /
\(TYP.)\ \ \
� I
SEDIMENT
FENCE \
SKIMMER BASIN #12
1"=50' BOTTOM BASIN ELEVATION: 574.00
WATER LEVEL ELEVATION: 577.50
TOP DAM ELEVATION: 579.00
TOP DAM WIDTH: 5'
WEIR LENGTH: 8'
MIN SURFACE AREA: 2079 FT2
MIN VOLUME: 4887 FT3
ORIFICE DIA.: 1.25"
SKIMMER SIZE: 1.5"
SKIMMER BASIN #11
1"=50' BOTTOM BASIN ELEVATION: 588.50
WATER LEVEL ELEVATION: 592.00
TOP DAM ELEVATION: 604.00
TOP DAM WIDTH: 5'
WEIR LENGTH: 8'
MIN SURFACE AREA: 7500 FT2
MIN VOLUME: 21116 FT3
ORIFICE DIA.: 2"
SKIMMER SIZE: 5"
1 "=50'
LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F T
0� F��GoN
T T T
C 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
NO: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME:
SKIMMER BASIN
GRADING
DRAWING NUMBER:
302

50 0 50 100,--- 150 \200
/ z — 7u
\ I D 03 mm � II z .�
(7�INV. (BURIED9 BOTH E
/ EXIST. 18" RCP ) A-
-7
NV. = 610.49-----------
J I(BURIED) / IN
z oz �� �<
C) m
/ EX. EOP NV. = 61 '
ELEV. = 616.09 �k = on
IO SIGHT TRIANGLE ,
ROCK PIPE \ k.
/
INTLET; PROTECTION
l 80' OF 2 F;CP
I }
I 0
/ \V FES 11.0%
INV. = 612.59
/ i/
X
ROP. ROAD
ELEV.=6'
kT STA. 0+:
—2.
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0+00 1 +00 2+00 3+00 4+00
TABLE 1 — CHANNEL DETAILS
DESCRIPTION
CHANNEL DETAIL
REFERENCE
CURLEX TYPE
END 1 TO STA. 7+50
CHANNEL DETAIL 1
CURLEX TYPE I
END 2 TO STA. 8+25
CHANNEL DETAIL 1
CURLEX TYPE I
(WEST OF ROAD) FROM STA. 15+00 TO 11+50
CHANNEL DETAIL 1
CURLEX TYPE I
FROM STA. 15+50 TO STA 8+00 AT EDGE OF
EASTERN —MOST PAVEMENT
CHANNEL DETAIL 1
CURLEX TYPE I
FROM ENDWALL #2 TO STA 15+00
CHANNEL DETAIL 2
CURLEX TYPE III
FROM ENDWALL #1 TO STA 15+50
CHANNEL DETAIL 2
CURLEX TYPE III
FROM ENDWALL #2 TO STA. 20+00
CHANNEL DETAIL 2
CURLEX TYPE I
FROM ENDWALL #1 TO STA. 20+00
CHANNEL DETAIL 2
CURLEX TYPE III
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 18+00 19+00
20+00
670
650
v
630
620
610
590
580
570
21 +00
i
3ASIN #4
0, LaBeLLa
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Winston-Salem, NC 27103
336-842-4065
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F T
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© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
ENTRANCE ROAD
PLAN AND PROFILE
DRAWING NUMBER:
C303

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/
LEGEND
77
DRAINAGE AREA T/130tTtDARY
PID: 213�
Dr T\
PROPOSED SKIMMER BASIN SK
(i
—b
/ / AP BA 11 T)INC7{
\POR ON OF
102 3
PID: 2739
AREA = r �' l \� \\1 \�
PAMELA A CSC-RE�L�UST
5.768 Ac
LOCATED 2266'
/` OM CENTER OF
OPERATION
_<�� 7 BRIAN 2J LEE / 1
SKI AREA - g \ ( \ / I I I — �\ —I — W*102 2
3.89 Ac \\ \ \ \\ \ \ \ \ J P(� HEATHER RATCL FE
PIER 26 RUAFLE
SKI I AREA y
A /i I
- 9.34 Ac �� ��_ \ I \ 1 \ / / I PID:1 74
�2.1�3Ac /fir / \\�� \ , I II // I i I I ( -
ROBERT A AG
Pao— - /
/ \
N
207T `
FROM CENTER OF / %�
oPERAnaIr
102768
�j� // -�\� ( / / / -_- �� 9�I ♦ - / / \ I / / / / \ \ `/ / / ( /� �i PID: 770
WAN9A W R
�I1�►
04 i1/SB1 AREA
.57 Pic
STEP06 HEN AIIL
-� �.02786 /
\ \� 1 ,l-RAt?H W BLAiQD _ \
11 l l l — ,� w \ \ I \ 1
SKBI AREA'- c m : 1 o27s5 /
2.87 Ac / / a
P
/
—_-�
K 5 I/ I \ \ / / / �- i I I ��P F---� HOUSE
AREA J I j LOCATE1�23>�—
\ L — — FROM CENTER 01
OPERATION/
_ J ) l _ l
SKI AftEA
)-pn'
:102 64OTHI� J U OON \ / \ \ \ \ \ // /
�� / , // • / , / // / / , Pf1% / I / , ID. 102747 pLU
�14�K 7F 4A SON,
1 I / / \ ✓ ///� �- \\\\ ?� V D \
CE
x
I 1027 \ \ / / / /� \ J�� ZY62
f / / J /� / I I OAH /{ SA ER
11\ III11 I \�
\ \
1 I 1 I \ \ L A 73
��
77
/
PID: 1�25-98\ `�
\
HID
0 CAM LLC
INV URIEDif�\PI 1�26a8
\\ ✓ \ \\ \ \ \ \� Nv�2LE JIBYR�
-BOTH ENDBURII
CP
610.47' 1_j
PID: 102§A2
—'FM M R TT
Z'
�� \\ \ � ��� � �, � � •� � �� \ �) )> I // / / l � /ice / —. ,, I I I I � � I
170595
KINSEY
\\ AMANDA IVEY POOD
125 0 125 250 375 500'
I" = 250'
LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F T 71
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© 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE.
9/24/18
�7:7:�n1n�[el►r:�uC
DRAINAGE AREAS
DRAWING NUMBER:
C304

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2.4'
/ / R62'
I
I
I
I
I
R20,
I
I
15 0 15 \ 30 45 60 \
1" = 30' \
1
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R 40'
32'
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R�
/
/
,9 6'
R59
9'
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00 ' I • ' �
NCDOT STEEL
BEAM GUARDRAIL
160 LF (5' OFF E.P.) \
ENDWALL #1
_ INV. = 595.52
ENDWALL #2
INV. = 593.97
1 0 15 30 45 60
1" = 30' \
SKIMMER BASIN #6 Z
/ \ \ x
�x
♦\ k�k\ INV. = 610.89 }
EXIST. 12" RCP ♦ X�k ,�
\ BOTH ENDS BURIED
X
♦ INV. = 611.79,E
Ac
— k
CR
X k
INV. = 610.891 —
(BURIED) \ k
� X
EXIST. 18" RCP \
\ \ 61
8
a \ �
IINV. = 610.49
J (BURIED)
/ R20
/
/
20 0 20 40 60 80
1" = 40'
630
2.00%--\
EXIST. ROAD EP 620
ELEV.=616.09
AT STA. 0+09.72
—1.72%�
610
0 0J
LO
N
CD
EX. EOP
/ ELEV. = 616.09
I
I I \ \
OF 24 RCP
01 \ \ \
FES 1 \ \
INV. = 612.59C)
\
41
♦ ♦ k\k
`\k�k
4 \k\k
0
ROCK PIPE \
INTLET \
10' X 70' PROTECTION
SIGHT TRIANGLE \ \
1-4
PROP. ROAD C/L
ELEV.=615.82
AT STA. 0+23.10
1
1
32
2
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P
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00 00
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ao rn
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0+00
1 +00
630
620
610
600
ro
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N
CD
2+00
20 0 20 40 60 80
V. = 40'
HORIZONTAL 1" = 40'
VERTICAL 1" = 4'
Uzi LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F T
0� F�RGoN
� T �
© 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
DATE: DESCRIPTION:
PREISKIONS
PROJECT NUMBER:
2180544
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME:
PARKING, STREAM
CROSSING, AND
ENTRANCE ROAD DETAILS
DRAWING NUMBER:
305

LaBeLLa
Powered by partnership.
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�—{ 100' WIDTH
10,
I I
TOP OF BERM
WATER SURFACE ELEVATION = 595 FT
ELEVATION = 594 FT
2 5 11 BOTTOM 3� 12 5
ELEVATION
TAILING POND #1
10, 100' WIDTH
i�' � TOP OF BERM
WATER SURFACE ELEVATION = 591 FT
ELEVATION = 590 FT
2.5 1 BOTTOM 1
ELEVATION
TAILING POND #2
NOTE:
EACH TAILING 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 TAILING PONDS
WILL VARY DEPENDING ON THE SURROUNDING SURFACE.
TAILING POND DETAIL
NTS
TOP "
nF nnu
18"
PROTECT WEIR WITH FILTER
FABRIC AND RIPRAP
FILTER FABRIC
4" OR 6" PVC
5'x3'x18"
6" STONE APRON
WITH FILTER FABRIC
NOTES:
1. USE FOR DRAINAGE AREAS NOT EXCEEDING FIVE ACRES.
2. EARTH BERM SHALL BE STABILIZED w/SEEDING ACCORDING TO
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
RETRIEVAL ROPE SKIMMER
NOTES:
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.
RIGID FLEXIBLE JOINT
OUTLET END: CONNECTIO
TO OUTLET PIPE OR RIS
SKIMMER DETAIL
NTS
BAFFLES WITH METAL T-POST,
WOVEN WIRE FABRIC BACKING
AND COIR FIBER NETTING
Uf�l\I\LL I II L LVIVVLI\ II If11V JI IV YYIV.
NOT INCLUDED WITH SKIMMER SUPPLIED BY USER.
� � N ,` IIIIIIIIIIIIII
o d
M �Il llll 1 1
IL - SKIMMER WITH RE
LENGTH
SKIMMER BASIN CROSS SECTION
WEIR CROSS SECTION
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 SLIGHTLY 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.
TEMPORARY SKIMMER BASIN (2 OF 2
NTS
RY
EDGE
FABRIC)
TOP
DAM
STONE
WITH F
)PE
TEMPORARY SKIMMER BASIN (1 OF
NTS
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
0� F�RGoN
LN 1 �
� T �
© 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
DRAWING NUMBER:
SITE DETAILS
C401

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ENERGY DISSIPATION
(RIP -RAP OR
SANDBAGS)
IMPERVIOUS
SEDIMENT
DIKE
DEWATERING
DEVICE
DISCHARGE HOSE
SUCTION HOSE
SUMP
Flow
Ff— HOLE
A
PROJECT
a IMPERVIOUS TOP OF
CLEAN BANK
WATER
DIKE.
WORK z
AREA
N �
NOTES:
1. ANCHOR ALL PUMPS AND PIPES SECURLEY.
2. WORK AREA SHALL NOT EXCEED THE AREA
THAT CAN BE COMPLETED IN ONE DAY.
BYPASS PUMPING DETAIL
NTS
3 TIMES INNER I.D.
DIAMETER (I.D.)
SECTION OF DIKE
L1
PIPE \ < FES �a
d
°
r0c am
_III= I1 I I1 I I1 I L- � 11 111 111 111 I I` I'
-i'
FILTER
L2 FABRIC
SECTION 'A -A'
BASE FLOW +1'
RAP APRON
NOTES:
1) = 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.
PIPE OUTLET TO FLAT AREA NO WELL-DEFINED CHANNEL
NTS
HIGH TENSILE IMPERVIOUS
GEOTEXTILE FABRIC
EXISTING STREAM
CHANNEL (DO NOT
EXCAVATE EXISTING
CHANNEL OR
BANKS)
EXISTING STREAM
CHANNEL
NOTES:
1.PREPARE THE CHANNEL AND BANKS FOR INSTALLATION.
A. REMOVE ALL DEBRIS FROM STONE DIKE LOCATION.
B. REMOVE ALL SHARP ROCKS AND ROOTS TO AVOID
PUNCTURES.
C. DO NOT EXCAVATE THE EXISTING CHANNEL OR BANKS.
2. PLACE HIGH TENSILE IMPERIOUS FABRIC CENTERED OVER
THE PROPOSED DIKE. USE ENOUGH FABRIC OVER THE DIKE
TO MAKE IT IMPERVIOUS.
3. ROLL FABRIC OVER THE STONE TO FORM THE DIKE. THE
TOP LAYER IS ROLLED FROM THE UPSTREAM TO DOWNSTREAM
DIRECTION.
4. INSPECT FOR LEAKS REGULARLY AND REMOVE DEBRIS.
IMPERVIOUS DIKE - STONE AND IMPERVIOUS FABRIC
NTS
TRENCH WIDTH
w -
z
— J
J
- � I
O
6"
d
d ° 11
°O d °° d° 12
d d d d °
° ° d
ANTI -SEEP COLLAR
w
z
J
J_
H
PLAN VIEW
L1
SECTION 'A -A'
PIPE OUTLET TO WELL-DEFINED CHANNEL
NTS
TRENCH
GRADE
= II Z� IIIIIII
�Ed
18 III
�0
III d ° Q
11
° 114 II
III dll
° JIIIII
° Q° d°Q
UTILI° °LINE I
L
dQ 6-
d 1I1I �d °° (DIAMETER
VARIES)
dQd d °
�—
I1I1y1I1
° d d ° d °d° A,
d da
d
ANTI -SEEP COLLAR. 12"
CLASS B CONCRETE
SECTION A —A
ANTI -SEEP COLLAR
NTS
NOTES:
1) L1 = 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.
I ILI LI\
FABRIC
LaBeLLa
Powered by partnership.
615 St. George Square
Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
labellapc.com
F
0� F�RGoN
� T �
© 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
DRAWING NUMBER:
SITE DETAILS
C402

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OVERBURI
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v�
0 O O STOPBAR
r0�I�N
rmiZ—I=D
=C)DDm
z
=OmOO SIDEWALK 4' MIN. 6' MIN.
r- TO PEDESTRIAN
O DETECTABLE WARNING
n zD DOMES CROSSWALK CROSSWALK
� i
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O j
_ CURB RAMP
I I
SIDEWALK
L____I
4' X 4' 24" WHITE
Ill CLEAR SPACE CROSSWALK LINE
z
'O r 24" GAP CURB RAMPS
m C =
� RC
M M >
> Z o
z—ID
y3 0 10' MIN. WIDTco
co m
D ~
r G) Z 1- THE MINIMUM WIDTH OF STANDARD CROSSWALKS IS 6 FEET. THE MINIMUM WIDTH OF HI -VISIBILITY CROSSWALKS IS 10 FEET.
-n 2- SET BACK DISTANCE FROM INSIDE CROSSWALK MARKING TO NEAREST EDGE OF TRAVEL IS 4' MIN.
O
:)o 3- BEYOND THE CURB FACE, A CLEAR SPACE OF 4' X 4' FEET MINIMUM SHALL BE PROVIDED WITHIN THE WIDTH OF THE CROSSWALK.
4- PLACE STOP BARS A MINIMUM OF 4 FEET FROM NEAREST CROSSWALK LINE. STOP BARS AT SIGNALIZED INTERSECTIONS SHOULD
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.
HEET 1 OF 1
1205.0'
0
u7
CROSSWALK DETAIL
NTS
z
o C„
Q a
—
Hp~C�U
LL J !i
O O O =
w cc Q z W 3
ell WHITE
HU=O(ry
Q F-1
CROSSWALK LINES
U) 0 W
0OOCnQ
m
MIN.
z �
4'
.I{
I EOGE OF TRAVEL
TO CROSSWALK LINE
N
1
H
EL
W O
O
Cr
O
LL
CD N Y
J
I \ z o-i ZIll
Q
4' x 4' Qhe co
CLEAR SPACE Cr M O
o `�gi =
2 U
z ZZ
<LU"
Q
U) N F_
W W
LEGEND
CO Q w
J CL d
«
DIRECTION OF
CS
♦
TRAFFIC FLOW
z
w
CURB RAMP WITH
DETECTABLE
WARNING DOMES
16' WIDE 2:1 SLOPE - 16' WIDE 2:1 SLOPE -
8' HIGH AT TOP 18' BERM TOP 8' HIGH AT TOP
MINE SIDE
BARRIER BERM
NTS
ROAD/ADJACENT SIDE
SHEET 1 OF 1
1205.07
a•
4" e°
° O° A ° t °
• ° P• °
GROOVE JOINT IN SIDEWALK
1/8" RADIUS
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
SIDEWALK JOINS ANY RIGID STRUCTURE.
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.
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.
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
RESULTS IN A MAXIMUM OF 1/4" FROM FLUSH.
1/8" TO 1/4"
` JOINT FILLER
1/2"
TRANSVERSE EXPANSION
JOINT IN SIDEWALK
1/2" EXPANSION JOINT
w
H
o 1.50% (2.00% MAX.)
c' Of i
Fr U)
PROPOSED CURB & GUTTER
PROPOSED 4" CONCRETE SIDEWALK
DETAILS SHOWING EXPANSION JOINTS
SIDEWALK DETAIL
NTS
NOTES:
LARGE TREES SHALL BE 2" CALIPER AND 12' HEIGHT H
AT PLANTING, BALLED AND BURLAP. TREES SHALL BE DOUBLE -STAGGERED WITH 8-10' CENTERS
SMALL TREES SHALL BE 2" CALIPER AND 10' H
AT PLANTING, BALLED AND BURLAP
LARGE SHRUBS SHALL BE 3 GALLON, 36" H AT PLANTING
SEED THE ENTIRE BERM AFTER TREE AND SHRUB PLANTING 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
Small Tree
Large Shrub
Scientific Name
Common Name
Scientific Name
Common Name
Scientific Name
Common Name
Pinus Taeda
Loblolly Pine
Cercis Canadensis
Redbud
Ilex Vomitoria
Yaupon Holly
Chionanthus Virgincus
Fringetree
Leucothoe Populifolia
Florida Leucothoe
Ilex Opaca
American Holly
Myrica Cerifera
Wax Myrtle
IN CONCRETE SIDEWALK
2.5'
EXAMPLE SIDEWALK CONSTRUCTION DIMENSIONS:
WIDTH
RISE
CROSS —SLOPE
1.56%
4'
i"
5'
ill
1.67%
6'
1
1.56%
8'
1—"
1.56%
PARKING SPACE PAVEMENT MARKINGS
SIGNAGE—�
(MUST NOT OBSTRUCT
ACCESSIBLE ROUTE) ACCESSIBLE ROUTE
(SEE NOTE 2)
2% MAX. SLOPE IN ANY
DIRECTION ACROSS THE
AS SHOWN ® ® ® ® ® PARKING/UNLOADING SPACES.
ON PLANS
NOTE:
ONE OUT OF EVERY
SIX (6) ACCESSIBLE
11' 1 5' 1 8' 8' 8' 1 8' 1 5' 8' SPACES, BUT NOT
LESS THAN ONE, IS
REQUIRED TO BE VAN
VAN VAN ACCESSIBLE, PER
ACCESSIBLE ACCESSIBLE SECTION 1106.5 OF
SPACE SPACE NC STATE BUILDING
(OPTION 1) (OPTION 2) CODE
O
MUTCD
VAN R7-8P NO MUTCD RESERVED
ACCESSIBLE 12"x6" R7-1
12 x18 PARKING MurcO
PARKING
R7-8
RESERVED 12"x16"
PARKING R7-8 ANY
12"x,8" TIME
OPTIONAL MAXIMUM
ACCESIBLE PENALTY CLDSM 50.10C
LOADING oaso-$250 12"x9"
ZONE SIGN
MAXIMUM
PENALTY CLDSM 50.10C
$2s0 12"x9"
oazo-a�.s SEE STANDARD NO. 50.10C FOR
SUPPLEMETAL SIGN DETAIL
NOTES:
1. ALL 12"08" 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 CAROLINA DEPARTMENT OF
TRANSPORTATION SUPPLEMENT AND NC BUILDING CODE FOR ADDITIONAL
INFORMATION.
A nnr'00InI r MA nLnnLn A nm nLnNl A nr nr-rA ll n
NTS
30.0'
12" CRUSHER RUN OR
CABC STONE
HAUL ROAD TYP. SECTION
NTS
PULL POST
STABILIZE ROAD SIDE DITCHES
WITH 8' WIDTH CURLEX III HIGH
VELOCITY MATTING OR
APPROVED EQUIVALENT.
FIXED KNOTTED WIRE FENCING PERIMETER FENCE DETAIL
NITS
SWALE
2'
4' _MIN_
SINGLE STRAND
...RE
"T" POST
LaBeLLa
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Suite 300
Winston-Salem, NC 27103
336-842-4065
C#0430
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0� F�RGoN
F T
L— J
© 2016 LaBella Associates
ALAMAN C E
AGGREGATES, LLC
Alamance County Mine
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
DRAWING NUMBER:
SITE DETAILS
C403

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OVERLAP
JOIN STRIPS BY ANCHORING
AND OVERLAPPING
ANCHOR METTING IN
A 6INCH TRENCH.
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 SHOULD
PROVIDE COVER OF AT LEAST 30% OF THE SURFACE WHERE IT IS APPLIED.
1. APPLY LIME, FERTILIZER AND SEED BEFORE LAYING THE NET OR MAT.
IF OPEN -WEAVE NETTING IS USED, LIME 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 -DO NOT STRETCH.
3. TO SECURE THE NET, BURY THE UPSLOPE END IN A SLOT OR TRENCH NO LESS
THAN 6-INCHES DEEP, COVER WITH SOIL, AND TAMP FIRMLY AS SHOWN IN
THIS DETAIL. STAPLE THE NET EVERY 12-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
3-INCHES 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 THE SLOPE GRADE,
RESEED, AND REINSTALL MULCH. CONTINUE INSPECTIONS UNTIL VEGETATION
IS FIRMLY ESTABLISHED.
CHANNEL PROTECTION
SEEDING
SOIL AND VEGETATION
PREPARE SEEDBED BY RIPPING, CHISELING, HARROWING OR PLOWING TO DEPTH OF SIX INCHES SO AS TO PRODUCE A LOSE, FRIABLE SURFACE. REMOVE
ALL STONES, BOULDERS, STUMPS OR DEBRIS FROM THE SURFACE WHICH WOULD PROHIBIT GERMINATION OR PLANT GROWTH.
INCORPORATE INTO THE SOIL 800 TO 1,000 POUNDS OF 10-10-10 FERTILIZER PLUS 500 POUNDS OF TWENTY PERCENT (20%) SUPERPHOSPHATE PER ACRE
AND TWO TONS OF DOLOMITIC LIME PER ACRE UNLESS SOIL TESTS INDICATE THAT A LOWER RATE OF LIME CAN BE USED.
MULCH AFTER SEEDING WITH 1.5 TONS OF GRAIN STRAW PER ACRE.
PQ
PERMANENT SEEDINGS
/2N�\CY cPo
/
PLANTS MIXTURE PLANTING RATE/ACRE
PLANTING DATES
o° o 1001
TALL FESCUE 100-150 LBS.
AUG. 15-OCT. 15
(LOW MAINTENANCE)
FEB.15 -MAY 1
°
TALL FESCUE 200-250 LBS.
AUG. 15-OCT. 15
WATERWAYS AND LAWNS (HIGH MAINT.)
FEB. 15 - MAY 1
8" MIN
g g
O
BLEND OF TWO TURFTYPE 200-250 LBS.
AUG. 15-OCT. 15
o�
TALL RESCUES (90%) AND TWO OF MORE
FEB. 15 - MAY 1
o
o
IMPROVED KENTUCKY BLUEGRASS
2"-3" COARSE
VARIETIES (10%) (HIGH MAINTENANCE)
AGGREGATE
(SURGE STE) 12' MIN
ON
TALL FESCUE 100 LBS.
AUG. 15-OCT. 15
AS
AND KOBE OR KOREAN LESPEDEZA 20-25 LBS.
FEB.15 -MAY 1
REQUIRED
(SEE NOTE 1 BELOW)
TALL FESCUE 50 LBS.
NOV. 1-FEB.1
SERICEA LESPEDEZA 60 LBS./ACRE
(UNSCARIFIED)
CONSTRUCTION SPECIFICATIONS:
TALL FESCUE AND 60 LBS.
JULY AND AUGUST
1. CLEAR THE ENTRANCE AND EXIT AREA OF ALL VEGETATION, ROOTS, AND OTHER OBJECTIONABLE
GERMAN MILLET OR SUDANGRASS AND 30 LBS.
MATERIAL AND PROPERLY GRADE IT.
(SEE NOTE 2 BELOW)
2. PLACE THE GRAVEL TO THE SPECIFIC GRADE AND DIMENSIONS SHOWN ON THE PLANS AND
SMOOTH IT.
TALL FESCUE 70 LBS.
NOV. 1-JAN.30
3. PROVIDE DRAINAGE TO CARRY WATER TO A SEDIMENT TRAP OR OTHER SUTIABLE OUTLET.
AND RYEGRAIN AND 25 LBS.
4. USE NONWOVEN GEOTEXTILE FABRICS BECAUSE THEY IMPROVE STABILITY OF THE FOUNDATION IN LOCATIONS
(SEE NOTE 2 BELOW)
SUBJECT TO SEEPAGE OR HIGH WATER TABLE.
COMMON BERMUDAGRASS 8 LBS. (HULLED)
APR. 15-JUNE 30
AND KOBE OR KOREAN LESPEDEZA 15-2 LBS. (UNHULLED)
FEB.1 - MAY 30
MAINTENANCE:
(SEE NOTE 1 BELOW)
MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LEAVING THE
CONSTRUCTION SITE. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2-INCH STONE. AFTER EACH
(1) FOR SPRING SEEDINGS, USE SCARIFIED LESPEDEZA SEED. FOR LATE FALL AND WINTER SEEDINGS, USE UNSCARIFIED SEEDS.
RAINFALL, INSPECT ANY STRUCTURE USED TO TRAP SEDIMENT AND CLEAN IT OUT AS NECESSARY.
(2) ANNUALS SUCH AS MILLET, SUNDANGRASS AND RYEGRAIN MUST BE KEPT AT 10-12" MAXIMUM HEIGHT.
IMMEDIATELY REMOVE ALL OBJECTIONABLE MATERIAL SPILLED, WASHED OR TRACKED ONTO PUBLIC
ROADWAYS.
TEMPORARY CONSTRUCTION ENTRANCE
PLAN
La
APRON LENGTH NONWOVEN EXTRA STRENGTH PER US FABRICS OR APPROVED EQUIVALENT (US 205 NW)
7�1 1 Z(
APRON
THICKNESS
SECTION A -A
CONSTRUCTION SPECIFICATIONS:
1. ENSURE THAT THE SUBGRADE FOR THE FILTER AND RIPRAP FOLLOWS THE REQUIRED LINES AND GRADES
SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO THE DENSITY OF THE
SURROUNDING UNDISTURBED MATERIAL. LOW AREAS IN THE SUBGRADE ON UNDISTURBED SOIL MAY
ALSO BE FILLED BY INCREASING THE RIPRAP THICKNESS.
2. THE RIPRAP AND GRAVEL FILTER MUST CONFORM TO THE SPECIFIED GRADING LIMITS SHOWN ON THE
PLANS.
3. FILTER CLOTH, WHEN USED, MUST MEET DESIGN REQUIREMENTS AND BE PROPERLY PROTECTED FROM
PUNCHING OR TEARING DURING INSTALLATION. REPAIR ANY DAMAGE BY REMOVING THE RIPRAP
AND PLACING ANOTHER PIECE OF FILTER CLOTH OVER THE DAMAGED AREA. ALL CONNECTING
JOINTS SHOULD OVERLAP A MINIMUM OF 1 FT. IF THE DAMAGE IS EXTENSIVE, REPLACE THE ENTIRE
FILTER CLOTH.
4. RIPRAP MAY BE PLACED BY EQUIPMENT, BUT TAKE CARE TO AVOID DAMAGING THE FILTER.
5. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 TIMES THE MAXIMUM STONE DIAMETER.
6. RIPRAP MAY BE FIELD STONE OR ROUGH QUARRY STONE. IT SHOULD BE HARD, ANGULAR, HIGHLY
WEATHER -RESISTANT AND WELL GRADED.
7. CONSTRUCT THE APRON ON ZERO GRADE WITH NO OVERFALL AT THE END. MAKE THE TOP OF THE
RIPRAP AT THE DOWNSTREAM END LEVEL WITH THE RECEIVING AREA OR SLIGHTLY BELOW IT.
8. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING STREAM AND 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 RAINS 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
SEEDING SCHEDULE
DEWATERING
CONCRETE
BLOCK
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1 .s' NEW RIPRAP TO
EXTEND TO TOP "B" MIN.
OF EXISTING BOTTOM WI[
CHANNEL BANKS
A CLASS B EROSION
CONTROLSTONE
WASHED STONE
(8" TOP LAYER)
�Oo ¢
O° 2'
FILTER O �Qo /O O �Q
FABRIC O 00 00���00 _ �@
SECTION A -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 DAM ABUTS THE CHANNEL BANKS.
3. EXTEND STONE AT LEAST 1.5-FT BEYOND THE DITCH BANKS TO KEEP OVERFLOW
WATER FROM UNDERCUTTING THE DAM AS IT RE-ENTERS THE CHANNEL.
4. SET SPACING BETWEEN DAMS TO ASSURE THAT THE ELEVATION AT THE TOP OF THE
LOWER DAM IS THE SAME AS THE TOE ELEVATION OF THE 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 REACH ABOVE THE MOST UPSTREAM DAM
IS STABLE.
7. ENSURE THAT CHANNEL APPURTENANCES, 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 DAMS,
INSALL 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 CARRYING SEDIMENT
OVER THE DAM. ADD STONES TO DAMS AS NEEDED TO MAINTAIN DESIGN WEIGHT
AND CROSS SECTION.
TEMPORARY GRAVEL CHECK DAM
1�r
I
"T" RIPRAP
BURY ENDS OF
THICKNESS
FILTER FABRIC
12" MINIMUM
TYPICAL
MINIMUM t50" 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 FILL REQUIRED IN THE SUBGRADE TO A
DENSITY APPROXIMATING THAT OF THE SURROUNDING UNDISTURBED MATERIAL OR OVERFILL
DEPRESSIONS WITH RIPRAP. REMOVE BRUSH, TREES, STUMPS AND OTHER OBJECTIONABLE MATERIAL.
CUT THE SUBGRADE SUFFICIENTLY DEEP THAT THE FINISHED GRADE OF THE RIPRAP WILL BE AT THE
ELEVATION OF THE 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 DIRECTLY ON THE PREPARED SUBGRADE. OVERLAP
THE EDGES BY AT LEAST 12-INCHES 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 RIPRAP. IF DAMAGE OCCURS, REMOVE THE RIPRAP AND
REPAIR THE SHEET BY ADDING ANOTHER LAYER OF FILTER MATERIAL WITH A MINIMUM OVERLAP OF
12-INCHES AROUND THE DAMAGED AREA. IF EXTENSIVE DAMAGE IS SUSPECTED, REMOVE AND REPLACE
THE ENTIRE SHEET.
WHERE LARGE STONES ARE USED OR MACHINE PLACEMENT IS DIFFICULY, A 4-INCH 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
FILTER FABRIC. PLACE RIPRAP SO THAT IT FORMS A DENSE, WELL -GRADED MASS OF STONE WITH A
MINIMUM OF VOIDS. THE DESIRED DISTRIBUTION 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 CHUTES 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 STONES.
HAND PLACING MAY BE NECESSARY TO ACHIEVE THE PROPER DISTRIBUTION OF STONE SIZES TO
PRODUCE A RELATIVELY SHOOTH, UNIFORM SURFACE. THE FINISHED GRADE OF THE RIPRAP SHOULD
BLEND (MATCH GRADE) WITH THE SURROUNDING AREA. NO OVERFALL OR PROTRUSION OF RIPRAP
SHOULD BE APPARENT WHICH WOULD IMPAIR STREAM FLOWS.
RIP RAP CHANNEL PROTECTION
EXISTING
GRADE
2:1 SLOPE,
GRAVEL FILTER
TEMPORARY WASHED WIRE SCREEN
SEDIMENT STONE
POOL WIRE SCREEN
V MIN.
2' MAX. O• - - 16"
SEDIMENT
DROP INLET
WITH GRATE
717
SECTION
CONSTRUCTION SPECIFICATIONS:
1. LAY ONE BLOCK ON EACH SIDE OF THE STRUCTURE ON ITS SIDE IN THE BOTTOM ROW TO ALLOW POOL
DRAINAGE. THE FOUNDATION SHOULD BE EXCAVATED AT LEAST 2-INCHES BELOW THE CREST OF THE
STORM DRAIN. 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" WOOD STUDSTHROUGH BLOCK OPENINGS.
2. CAREFULLY FIT HARDWARE CLOTH OR COMPARABLE WIRE MESH WITH /2-INCH OPENINGS OVER ALL
BLOCK OPENINGS TO HOLD GRAVEL IN PLACE.
3. USE CLEAN GRAVEL, Y4- TO'2-INCH 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. DOT #57 WASHED STONE IS
RECOMMENDED.
MAINTENANCE:
1. INSPECT THE BARRIER AFTER EACH RAIN AND MAKE REPAIRS AS NEEDED.
2. REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR SUBSEQUENT
RAINS.
3. WHEN 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
s AND GRAVEL DROP INLET PROTECTION
C501
WIRE MESH
SUPPORTFENCE a
STEEL POST TYP.
\ FILTER FABRIC
co \
4"
MATERIAL SPECIFICATIONS:
1. USE A SYNTHETIC FILTER FABRIC OF AT LEAST 95% BY WEIGHT OF POLYOLEFINS OR POLYESTER, WHICH
IS CERTIFIED 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 ARE 1.33 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 WITH A MINIMUM 14-
GUAGE AND A MAXIMUM MESH SPACING OF 6-INCHES.
CONSTRUCTION SPECIFICATIONS:
1. CONSTRUCT THE SEDIMENT BARRIER OF STANDARD STRENGTH OR EXTRA STRENGTH SYNTHETIC FILTER
FABRICS.
2. ENSURE THAT THE HEIGHT OF THE SEDIMENT FENCE DOES NOT EXCEED 18-INCHES ABOVE THE GROUND
SURFACE (HIGHER FENCES MAY IMPOUND VOLUMES OF WATER SUFFICIENT TO CAUSE FAILURE OF THE
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 A
SUPPORT POST WITH OVERLAP TO THE NEXT POST.
4. SUPPORT STANDARD STRENGTH FILTER FABRIC BY WIRE MESH FASTENED SECURLYTO 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 WIRE MESH SUPPORT FENCE IS USED, SPACE POSTS A MAXIMUM OF 8-FEET APART. STEEL
SUPPORT POSTS SHOULD BE DRIVEN SECURELY INTO THE GROUND TO A MINIMUM OF 18-INCHES.
WIRE MESH SUPPORT FENCE MATERIAL SHALL BE AGRICULTURAL QUALITY 14-GAGE ANNEALED
STEEL WIRE WITH A 4" x 5" MAX. SPACING PATTERN.
6. EXTRA STRENGTH FILTER FABRIC WITH 6-FT POST SPACING DOES NOT REQUIRE WIRE MESH SUPPORT
FENCE. TIE WIRE THE FILTER FABRIC DIRECTLY TO POSTS.
7. EXCAVATE A TRENCH APPROXIMATELY 4-INCHES WIDE AND 8-INCHES DEEP ALONG THE PROPOSED
LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
8. BACKFILL THE TRENCH WITH COMPACTED SOIL PLACED OVER THE FILTER FABRIC.
9. DO NOT ATTACH FILTER FABRIC TO EXISTING TREES.
MAINTENANCE:
1. INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL. MAKE ANY REQUIRED
REPAIRS IMMEDIATELY. SHOULD THE FABRIC OF A SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE OR
BECOME INNEFECTIVE, REPLACE IT PROMPTLY. REPLACE BURLAP EVERY 60 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 TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN
PROPERLY STABILIZED.
TEMPORARY SEDIMENT FENCE
TCH WIDTH OF
AMENT TRAP
FLET WEIR
SECTION A -A
1. ENSURE THAT THE SUBGRADE FOR THE RIPRAP FOLLOWS THE REQUIRED LINES AND
GRADES SHOWN IN THE PLAN. COMPACT ANY FILL REQUIRED IN THE SUBGRADE TO
THE DENSITY OF THE SURROUNDING UNDISTURBED MATERIAL. LOW AREAS IN THE
SUBGRADE ON UNDISTURBED SOIL MAY ALSO BE FILLED BY INCREASING THE RIPRAP
THICKNESS.
2. RIPRAP MAY BE PLACED BY EQUIPMENT.
3. THE MINIMUM THICKNESS OF THE RIPRAP SHOULD BE 1.5 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.
5. CONSTRUCT THE APRON ON ZERO GRADE WITH NO OVERFALL AT THE END. MAKE THE
TOP OF THE RIPRAP AT THE DOWNSTREAM END LEVEL WITH THE RECEIVING AREA OR
SLIGHTLY BELOW IT.
6. ENSURE THAT THE APRON IS PROPERLY ALIGNED WITH THE RECEIVING 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.
7. IMMEDIATELY AFTER CONSTRUCTION, STABILIZE ALL DISTURBED AREAS WITH VEGETATION.
MAINTENANCE
INSPECT RIPRAP OUTLET STRUCTURES AFTER HEAVY RAINS 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.
TEMPORARY SEDIMENT
TRAP RIP RAP OUTLET PROTECTION
DIKE
HOLD-DOWN STAKES g ° $ 3:1 1.5' MIN.
PLASTIC
CORRUGATED I I I -I -III I I -I I -I I -I 1I-
PIPE (PER PLAN) I -1 11-1 11-1 I I
COMPACTED FILL PIPE -
-III INLET
STABILIZE -L FLOW
OUTLET II=111-
�• STONE INLET
[]- �MIN C
O 0 9� PROTECTION
LEVEL
SECTION
PLAN VIEW FLOW
STANDARD T-SECTION
CONSTRUCTION SPECIFICATIONS
A COMMON FAILURE OF SLOPE DRAINS IS CAUSED BY WATER SATURATING THE SOIL
AND SEEPING ALONG THE PIPE. THIS CREATES VOIDS FROM CONSOLIDATION AND
PIPING AND CAUSES WASHOUTS. PROPER BACKFILLING AROUND AND UNDER THE
PIPE "HAUNCHES" WITH STABLE SOIL MATERIAL AND HAND COMPACTION IN 6-INCH
LIFTS TO ACHIEVE FIRM CONTACT BETWEEN THE PIPE AND THE SOIL AT ALL POINTS WILL
ELIMINATE THIS TYPE OF FAILURE.
1. PLACE SLOPE DRAINS ON UNDISTURBED SOIL OR WELL -COMPACTED FILL AT LOCATIONS
AND ELEVATIONS SHOWN ON THE PLANS.
2. SLIGHTLY SLOPE THE SECTION OF PIPE UNDER THE DIKE TOWARD ITS OUTLET.
3. HAND TAMP THE SOIL UNDER AND AROUND THE ENTRANCE SECTION IN LIFTS NOT TO
EXCEED 6-INCHES.
4. ENSURE THAT FILL OVER THE DRAIN AT THE TOP OF THE SLOPE HAS MINIMUM
DIMENSIONS OF 1.5 FT. DEPTH, 4 FT. TOP WIDTH, AND 3:1 SIDE SLOPES.
5. ENSURE THAT ALL SLOPE DRAIN CONNECTIONS ARE WATERTIGHT.
6. ENSURE THAT ALL FILL MATERIAL IS WELL -COMPACTED. SECURELY FASTEN THE
EXPOSED SECTION OF THE DRAIN WITH GROMMETS OR STAKES SPACED NO MORE
THAN 10-FEET APART.
7. EXTEND THE DRAIN BEYOND THE TOE OF THE SLOPE AND ADEQUATELY PROTECT THE
OUTLET FROM EROSION.
8. MAKE THE SETTLED, COMPACTED DIKE RIDGE NO LESS THAN 1-FEET ABOVE THE TOP
OF THE PIPE AT EVERY POINT.
9. IMMEDIATELY STABILIZE ALL DISTURBED AREAS FOLLOWING CONSTRUCTION.
MAINTENANCE:
INSPECT THE SLOPE DRAIN AND SUPPORTING DIVERSION AFTER EVERY RAINFALL
AND PROMPTLY MAKE NECESSARY REPAIRS. WHEN THE PROTECTED AREA HAS BEEN
PERMANENTLY STABILIZED. TEMPORARY MEASURES MAY BE REMOVED, MATERIALS
DISPOSED OF PROPERLY, AND ALL DISTURBED AREAS STABILIZED APPROPRIATELY.
TEMPORARY SLOPE DRAIN
LaBeLLa
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T T T
L_ T -1
© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
NO:
DATE:
DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY:
KCG/ATC
REVIEWED BY:
PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
EROSION AND
SEDIMENT CONTROL
DETAILS
DRAWING NUMBER:
C501

6.10
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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 runoff and 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
mud and dust production from bare soil surfaces during construction.
Conditions Where On any cleared, unvegetated, or sparsely vegetated soil surface where
vegetative cover is needed for less than 1 year. Applications of this practice
Practice Applies 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,
are suitable for establishing initial or temporary vegetative cover. Temporary
Considerations seeding preserves the integrity of earthen sediment control structures such
as dikes, diversions, and the banks of dams and sediment basins. It can also
reduce the amount of maintenance associated 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 6.11, Permanent Seeding.
Failure to follow established guidelines and recommendations carefully may
result in an inadequate or short-lived stand of vegetation that will not control
erosion.
Temporary seeding provides protection for no more than 1 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 well -pulverized, loose, and uniform. Where hydroseeding
methods are used, the surface may be left with a more irregular surface of
large clods and stones.
Liming -Apply lime according to soil testrecommendations. IfthepH (acidity)
of the soil is not known, an application of ground agricultural limestone at the
rate of 1 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 lime
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 6.10a for seeding
in late winter and early spring, Table 6.10b for summer, and Table 6.10c for
fall.
In the Mountains, December and January seedings have poor 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 hydroseeder. Use seeding rates given in Tables 6.10a-6.10c. Broadcast
seeding and hydroseeding 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 an 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
Surface Stabilization
6.11, Permanent Seeding
6.14, Mulching
Appendix
8.02, Vegetation Tables
TEMPORARY SEEDING DETAIL
Table 6.10a
Temporary Seeding
Recommendations for Late
Winter and Early Spring
Table 6.10b
Temporary Seeding
Recommendations for
Summer
Table 6.10c
Temporary Seeding
Recommendations for Fall
Seeding mixture
Species Rate (lb/acre)
Rye (grain) 120
Annual lespedeza (Kobe in
Piedmont and Coastal Plain,
Korean in Mountains) 50
Omit annual lespedeza when duration of temporary cover is not to
extend beyond June.
Seeding dates
Mountains -Above 2500 feet: Feb. 15 - May 15
Below 2500 feet: Feb. 1- May 1
Piedmont -Jan. 1 - May 1
Coastal Plain -Dec. 1 -Apr. 15
Soil amendments
Follow recommendations of soil tests or apply 2,000 lb/acre ground
agricultural limestone and 750 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 Ib/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
German millet
Rate (lb/acre)
40
In the Piedmont and Mountains, a small -stemmed Sudangrass may be
substituted at a rate of 50 lb/acre.
Seeding dates
Mountains -May 15 -Aug. 15
Piedmont -May 1 -Aug. 15
Coastal Plain -Apr. 15 -Aug. 15
Soil amendments
Follow recommendations of soil tests or apply 2,000 lb/acre ground
agricultural limestone and 750 lb/acre 10-10-10 fertilizer.
Mulch
Apply 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Refertilize if growth is not fully adequate. Reseed, refertilize and mulch
immediately following erosion or other damage.
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 4,000 lb/acre straw. Anchor straw by tacking with asphalt, netting,
or a mulch anchoring tool. A disk with blades set nearly straight can be
used as a mulch anchoring tool.
Maintenance
Repair and refertilize damaged areas immediately. Topdress with 50
lb/acre of nitrogen in March. If it is necessary to extent temporary
cover beyond June 15, overseed with 50 lb/acre Kobe (Piedmont and
Coastal Plain) or Korean (Mountains) lespedeza in late February or
early March.
NOTES:
1. STRUCTURAL STONE SHALL BE
CLASS B STONE.
2. SEDIMENT CONTROL STONE
SHALL BE NO.5 OR NO.57
3. DIMENSIONS ARE MINIMUM
ACCEPTABLE UNLESS OTHERWISE
SPECIFIED BY THE ENGINEER.
F
PIPE
FLOW
A
STRUCTURALSTONE
FLOOD STORAGE ZONE MI
1�
SEDIMENT STORAGE ZONE
V R
��CJ O 'INVERT PIPE FLOW
NATURAL GROUND
36" PIPE MAX.
SEDIMENT CONTROL STONE SECTION A -A
STANDARD ROCK PIPE INLET PROTECTION
9' MIN. 10'
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 REQUIREMENTS
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 ROOM AROUND DIVERSIONS TO 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 THE DIVERSION RIDGE. CAREFULLY
CHECK OUTLETS AND MAKE TIMELY REPAIRS AS NEEDED. WHEN THE AREA PROTECTED IS
PERMANENTLY STABILIZED, REMOVE THE RIDGE AND THE CHANNEL TO BLEND WITH THE NATURAL
GROUND LEVEL AND APPROPRIATELY STABILIZE IT.
JEMPORARY DIVERSION DITCH
STEEL POST
WIRE FENCING
(IF APPLICABLE)
WOVEN FILTER
FABRIC
STEEL POST
CLASS 1 OR 2 1' MIN WASHED STONE
RIP -RAP (NCDOT #5 OR #57)
F OW
4' MAX
CLASS 1 OR 2 RIP -RAP WITH 6
INCHES OF WASHED STONE ON
UPSTREAM FACE
GENERAL NOTES:
1. SEDIMENT FILTER OUTLET SHALL BE 16INCHES HIGH BUT NO
TALLER THAN 18 INCHES
2. CLASS 1 OR 2 RIP -RAP SHALL BE USED AND COVERED WITH
6 INCHES OF NCDOT #5 OR #57 WASHED STONE ON THE
UPSLOPE SIDE.
3. POSTS SHALL BE NO MORE THAN 4 FEET APART.
4. SITE OUTLETS AT ANY POINT SMALL CONCENTRATED FLOWS
ARE ANTICIPATED AND AT THE DIRECTION OF THE
INSPECTOR.
5. ONE ACRE MAXIMUM DRAINAGE AREA PER OUTLET.
#57 WASHED STONE PILED
AGAINST AND ON TOP
OF HARDWARE CLOTH
16" MINIMUM
STONE HEIGHT
MAINTENANCE NOTES:
1. FILTER OUTLETS SHALL BE INSPECTED BY THE FINANCIALLY
RESPONSIBLE PARTY OR HIS AGENT IMMEDIATELY AFTER
EACH RAINFALL AND AT LEAST DAILY DURING PROLONGED STAKES MUST BE
NO MORE THAN
RAINFALL. ANY REPAIRS NEEDED SHALL BE MADE APART
IMMEDIATELY.
2. THE STONE SHALL BE REPLACED PROMPTLY AFTER ANY
EVENT THAT HAS CLOGGED OR REMOVED IT.
3. SEDIMENT DEPOSITS SHOULD BE REMOVED WHEN
DEPOSITS REACH HALF THE HEIGHT OF THE BARRIER. ANY
SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT
FENCE OUTLET IS REMOVED SHALL BE DRESSED TO
CONFORM TO THE EXISTING GRADE, PREPARED AND
SEEDED.
SILT FENCE STONE OUTLET
iCLASS
SHED TOP OF DAM
R 5' MIN. TOP OF WEIR
#57
. FT. / ACRE .5'
SEDIMENT TRAP , A 000� p FILMS
oCCCCQQ����6 o �7
o 506
E STONE FILL
B EROSION FILTER FABRIC
CONTROLSTONE
CROSS SECTION
OVERFILL 6" FOR EMERGENCY BY-PASS 6"
DESIGN 21" SETTLEMENT BELOW SETTLED TOP
SETTLED MIN. OF DAM
TOP
5"
II1=1 Ii1.5'- _1 I 1 III
_
S M L OQQ D = NATURAL
GROUND
3' 2:1 SIDE
FILTER IN. SLOPE MAX.
FABRIC 1:1 SIDE
SLOPE MAX.
STONE SECTION
CONSTRUCTION SPECIFICATIONS
1. CLEAR, GRUB, AND STRIP THE AREA UNDER THE EMBANKMENT OF ALL VEGETATION
AND ROOT MAT. REMOVE ALL SURFACE SOIL CONTAINING HIGH AMOUNTS OF
ORGANIC MATTER AND STOCKPILE OR DISPOSE OF IT PROPERLY. HAUL ALL
OBJECTIONABLE MATERIAL TO THE DESIGNATED DISPOSAL AREA.
2. ENSURE THAT FILL MATERIAL FOR THE EMBANKMENT IS FREE OF ROOTS, WOODY
O EXCEED 9-INCHES AND MACHINE COMPACT IT. OVERcFILL
THE FILL IN LIFTS NOT T
THE EMBANKMENT 6-INCHES TO ALLOW FOR SETTLEMENT.
3. CONSTRUCT THE OUTLET SECTION IN THE EMBANKMENT. PROTECT THE CONNECTION
BETWEEN THE RIPRAP AND THE SOIL FROM PIPING BY USING FILTER FABRIC OR A
KEYWAY CUTOFF TRENCH BETWEEN THE RIPRAP STRUCTURE AND THE SOIL.
a. PLACE THE FILTER FABRIC BETWEEN THE RIPRAP AND SOIL. EXTEND THE FABRIC
ACROSS THE SPILLWAY FOUNDATION AND SIDES TO THE TOP OF THE DAM;
OR
b. EXCAVATE A KEYWAY TRENCH ALONG THE CENTERLINE OF THE SPILLWAY
FOUNDATION EXTENDING UP THE SIDES TO THE HEIGHT OF THE DAM. THE TRENCH
SHOULD BE AT LEAST 2-FEET DEEP AND 2-FEET WIDE WITH 1:1 SIDE SLOPES.
4. CLEAR THE POND AREA BELOW THE ELEVATION OF THE CREST OF THE EMBANKMENT.
5. ALL CUT AND FILL SLOPES SHOULD BE 2:1 OR FLATTER.
6. ENSURE THAT THE STONE (DRAINAGE) SECTION OF THE EMBANKMENT HAS A MINIMUM
BOTTOM WIDTH OF 3-FEET AND MAXIMUM SIDE SLOPES OF 1:1 THAT EXTEND TO THE
BOTTOM OF THE SPILLWAY SECTION.
7. CONSTRUCT THE MINIMUM FINISHED STONE SPILLWAY BOTTOM WIDTH, AS SHOWN ON
THE PLANS, WITH 2:1 SIDE SLOPES EXTENDING TO THE TOP OF THE OVER FILLED
EMBANKMENT. KEEP THE THICKNESS OF THE SIDES OF THE SPILLWAY OUTLET STRUCTURE
AT A MINIMUM OF 21-INCHES. THE WEIR MUST BE LEVEL AND CONSTRUCTED TO GRADE
TO ASSURE DESIGN CAPACITY.
8. MATERIAL USED IN THE STONE SECTION SHOULD BE WELL -GRADED MIXTURE OF STONE
WITH A d50 SIZE OF 9-INCHES (CLASS B EROSION CONTROL STONE IS RECOMMENDED)
AND A MAXIMUM STONE SIZE OF 14-INCHES. THE STONE MAY BE MACHINE PLACED
AND THE SMALLER STONES WORKED INTO THE VOIDS OF THE LARGER STONES. THE
STONE SHOULD BE HARD, ANGULAR, AND HIGHLY WEATHER -RESISTANT.
9. ENSURE THAT THE STONE SPILLWAY OUTLET SECTION EXTENDS DOWNSTREAM PAST THE
TOE OF THE EMBANKMENT UNTIL STABLE CONDITIONS ARE REACHED AND OUTLET
VELOCITY IS ACCEPTABLE FOR THE RECEIVING STREAM. KEEP THE EDGES OF THE STONE
OUTLET SECTION FLUSH WITH THE SURROUNDING GROUND AND SHAPE THE CENTER TO
CONFINE THE OUTFLOW STREAM (REFERENCES: OUTLET PROTECTION).
10. DIRECT EMERGENCY BYPASS TO NATURAL, STABLE AREAS. LOCATE BYPASS OUTLETS
SO THAT FLOW WILL NOT DAMAGE THE EMBANKMENT.
11. STABILIZE THE EMBANKMENT AND ALL DISTURBED AREAS ABOVE THE SEDIMENT POOL
AND DOWNSTREAM FROM THE TRAP IMMEDIATELY AFTER CONSTRUCTION
(REFERENCES: SURFACE STABILIZATION).
12. SHOW THE DISTANCE FROM THE TOP OF THE SPILLWAY TO THE SEDIMENT CLEANOUT
LEVEL (ONE-HALF THE DESIGN DEPTH) ON THE PLANS AND MARK IT IN THE FIELD,
MAINTENANCE
1. INSPECT TEMPORARY SEDIMENT TRAPS AFTER EACH PERIOD OF SIGNIFICANT
RAINFALL. REMOVE SEDIMENT AND RESTORE THE TRAP TO ITS ORIGINAL DIMENSIONS
WHEN THE SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH OF THE
TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN THE DESIGNATED DISPOSAL AREA
AND REPLACE THE CONTAMINATED PART OF THE GRAVEL FACING.
2. 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 FT. BELOW
THE LOW POINT OF THE EMBANKMENT. IMMEDIATELY FILL ANY SETTLEMENT OF THE
EMBANKMENT TO SLIGHTLY ABOVE DESIGN GRADE. ANY RIPRAP DISPLACED FROM
THE SPILLWAY MUST BE REPLACED IMMEDIATELY.
3. AFTER ALL SEDIMENT -PRODUCING AREAS HAVE BEEN PERMANENTLY STABILIZED.
REMOVE THE STRUCTURE AND ALL UNSTABLE SEDIMENT. SMOOTH THE AREA TO
BLEND WITH THE ADJOINING AREAS AND STABILIZE PROPERLY (REFERENCES:
SURFACE STABILIZATION).
TEMPORARY SEDIMENT TRAP
HARDWARE CLOTH UP
THE SIDES OF THE
STAKES AND LAID ON
THE GROUND
SECTION
FILTER OF HARDWARE CLOTH AND #57 WASHED
STONE IS WRAPPED AROUND THE INLET
PLAN
#57 WASHED STONE
#57 WASHED STONE & WIRE INLET PROTECTION
NOTE:
BASIN DESIGN o SEE PROJECT EROSION CONTROL PLAN FOR SPECIFIC BASIN DIMENSIONS AND ORIENTATION
WATER LEVEL ELEV a
5-0" :F W TYPICAL BASIN PLAN
FLOATING SURFACE TOP OF DAM
SKIMMER. SEE DETAIL 'o MIN. Q LL ELEVATION
2
EMERGENCY SUPPORT ROPE OR SUPPORT POST STAKE TO
BAFFLE 2 1
SPILLWAY WIRE TO PREVENT 24" INTO BOTTOM SUPPORT WIRE
ELEVATION SAGGING OR SIDE
BASIN BOTTOM ELEVATION
COMPACTED EARTH
EMBANKMENT STABILIZED OUTLET
PARTIAL BASIN SECTION PROTECTION
CONSTRUCTION SPECIFICATIONS
COIR MESH OR SIMILAR
BAFFLE ELEVATION STAPLED OR TRENCHED
1. CLEAR, GRUB, AND STRIP THE AREA UNDER THE EMBANKMENT OF ALL VEGETATION AND
INTO BOTTOM OR SIDE
ROOT 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 6.62, SEDIMENT FENCE)
3. STEEL POST SHOULD BE DRIVEN TO A DEPTH OF 24 INCHES,SPACED 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 9 INCHES, 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 BAFFLES.
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 COIR MATERIAL, OVER THE TOP WIRE. THE FABRIC
SHOULD HAVE FIVE TO TEN PERCENT OPENINGS IN THE WEAVE. ATTACH FABRIC TO A ROPE AND A
4. PLACE THE BARREL (TYPICALLY 4-INCH SCHEDULE 40 PVC PIPE) ON A FIRM, 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 CRUSHED 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
AFTER 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. EARTHEN SPILLWAYS - INSTALL THE SPILLWAY IN UNDISTURBED SOIL TO THE GREATEST EXTENT
POSSIBLE. THE ACHIEVEMENT OF PLANNED ELEVATIONS, GRADE, DESIGN WIDTH, AND
ENTRANCE AND EXIT CHANNEL SLOPES ARE CRITICAL TO THE SUCCESSFUL OPERATION OF
6.11 * D '
"I.D. SCH. 40 SKIMMER
THE SPILLWAY. THE PILLWAY SHOULD BE LINED WITH LAMINATED PLASTIC OR IMPERMEABLE
PVC PIPE FLOAT
INFLUENT
GEOTEXTILE FABRIC. THE FABRIC MUST BE WIDE AND LONG ENOUGH TO COVER THE BOTTOM
6" PVC 90°
AND SIDES AND EXTEND ONTO THE TOP OF THE DAM FOR ANCHORING IN A TRENCH. THE
4--
BEND TYP.
EDGES MAY BE SECURED WITH 8-INCH STAPLES OR PINS. THE FABRIC MUST BE LONG ENOUGH
-
TO EXTEND DOWN THE SLOPE AND EXIT ONTO STABLE GROUND. THE WIDTH OF THE FABRIC
MUST BE ONE PIECE, NOT JOINED OR SPLICED; OTHERWISE WATER CAN GET UNDER THE FABRIC.
IF THE LENGTH OF THE FABRIC IS INSUFFICIENT FOR THE ENTIRE LENGTH OF THE SPILLWAY,
MULTIPLE SECTIONS, SPANNING THE COMPLETE WIDTH, MAY BE USED. THE UPPER SECTION(S)
SHOULD OVERLAP THE LOWER SECTION(S) SO THAT WATER CANNOT FLOW UNDER THE FABRIC.
4" PVC VENT 4" x 4" 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 PROTECTION TO DIVERT SEDIMENT
o
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
FLOW CONTROL
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" I.D. SCH. 40
10. INSTALL POROUS BAFFLES AS INDICATED IN SEDIMENT BASIN BAFFLE DETAIL.
11. AFTER ALL THE SEDIMENT -PRODUCING AREAS HAVE BEEN PERMANENTLY STABILIZED, REMOVE
.�PVPIPE
THE STRUCTURE AND ALL THE UNSTABLE SEDIMENT. SMOOTH THE AREA TO BLEND WITH THE
ADJOINING AREAS AND STABILIZE PROPERLY.
SKIMMER
6" PVC CAP INFLUENT
MAINTENANCE
1 6
5'-0"
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 ACCUMMULATES TO ONE-HALF THE
HEIGHT OF THE FIRST BAFFLE. PULL THE SKIMMER TO ONE SIDE SO THAT THE SEDIMENT UNDERNEATH
6" I.D. SCH. 40
IT CAN BE EXCAVATED. EXCAVATE THE SEDIMENT FROM THE ENTIRE BASIN, NOT JUST AROUND THE
4" PVC VENT [PVC.PIPE FLOAT
SKIMMER OR THE FIRST CELL. MAKE SURE VEGETATION GROWING IN THE BOTTOM OF THE BASIN
3'-6" V-6'
DOES NOT HOLD DOWN THE SKIMMER.
REPAIR THE BAFFLES IF THEY ARE DAMAGED. RE -ANCHOR THE BAFFLES IF WATER IS FLOWING
UNDERNEATH OR AROUND THEM.
4" 22.5° BEND
IF THE SKIMMER IS CLOGGED WITH TRASH AND THERE IS WATER IN THE BASIN, USUALLY JERKING
SP x HUB
ON THE ROPE WILL MAKE THE SKIMMER BOB UP AND DOWN AND DISLODGE THE DEBRIS AND
RESTORE FLOW. IF THIS DOES NOT WORK PULL THE SKIMMER OVER TO THE SIDE OF THE BASIN
4" PVC TEE
AND REMOVE THE DEBRIS. ALSO CHECK THE ORIFICE INSIDE THE SKIMMER TO SEE IF IT IS
STN.STL. HOSE 4" x 4" PVC TEE
CLOGGED; IF SO REMOVE THE DEBRIS.
CLAMPS TYP.
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 PLUMBER'S SNAKE OR BY FLUSHING WITH WATER. BE SURE AND
HOSE
REPLACE THE ORIFICE BEFORE REPOSITIONING THE SKIMMER.
3" I.D. SCH. 40 FLOW CONTROL ORIFICE
PVC PIPE CUT SMOOTH CIRCULAR
CHECK THE FABRIC LINED SPILLWAY FOR DAMAGE AND MAKE ANY REQUIRED REPAIRS WITH
OPENING TO DIMENSION
FABRIC THAT SPANS THE FULL 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
Floating Surface Skimmer
SHOULD BE TAKEN IN THE WINTER TO PREVENT THE SKIMMER FROM PLUGGING WITH ICE.
SEDIMENT BASIN AND SKIMMER
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© 2016 LaBella Associates
ALAMANCE
AGGREGATES, LLC
Alamance County Mine
NO: DATE: DESCRIPTION:
REVISIONS
PROJECT NUMBER:
2180544
DRAWN BY: KCG/ATC
REVIEWED BY: PAS
ISSUED FOR:
REVIEW
DATE:
9/24/18
DRAWING NAME
EROSION AND
SEDIMENT CONTROL
DETAILS
DRAWING NUMBER:
C502