20210506 Charah Colon Mine Drawing Set - Sealed

Owner/Permittee: Green Meadow, LLC
Operator: Charah, Inc.
Engineer of Record: HDR Engineering, Inc. of the Carolinas
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Sanford
Municipal
Golf Course
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=CT LOCATION
10
Riddle Rd
Sources: Esri, DeLorme, NAVTEQ, USGS, NRCAN, METI, PC, TomTom
Permit Drawings For
Colon Mine Site
Mine Permit
Modification
Lee County, North Carolina
Permit No. 53-05
Civil
HDR Project No.
10021146
Sanford, North Carolina
March 2021
Revised May 2021
Submitted to NCDEQ - DEMLR
INDEX OF DRAWINGS
GENERAL
OOG-01 COVER
OOG-02 MINE MAP (EXISTING CONDITIONS)
SITE WORK
OOC-01
MINE DEVELOPMENT PLAN (1 OF 2)
OOC-02
MINE DEVELOPMENT PLAN (2 OF 2)
OOC-03
MINE RECLAMATION PLAN
OOC-04
SITE CROSS SECTIONS
OOC-05
MISCELLANEOUS DETAILS
OOC-06
SEDIMENT BASIN DETAILS
A CA/� •
�4-�oF%ssr. ���•.
SEAL
Vr a`
N •�`�� J�i
°'••.S"M. VAN •'
HDR Engineering, Inc. of the Carolinas
440 S. Church St.
Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. F-0116

1 I 2
0 0
E m I m I
I w�
T y�
/�.,Colgotrawley 53 /4'
Db. 12 , Pg. 788
D
Thomas W. L
Bk. 1021, Pg. 80 m
0 5-6
el e�
Chn5topher Ro55 Chenco I
PC 5 PG 170 ' c
Bk. I 1 15, Pg. 59
I
I
I
I
I
I
300' RESIDENCE/GROUNDWATER
WELL BUFFER (TYP.) _
I
r
J % -
1
Wdham T Reaves, Jr.
PC 9 Pg 238
� I0 POND
Kenneth M. Alexander
Tract I
PC8PG IGC
Dr. 530, Pg. 56
AdJoiner Fence
Encroaches
5y I G.7'
5
o
Marlyn rry Be
Bk 707 Pg 119
Bk. 415, Pg, 335
EXISTING MINE PERMIT AB
BOUNDARY (TYP)
FUTURE
l�
MINE AREA
�((
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�� �� unerai wg�ub]fV�;/Bk� q 28 5"rrT9;
0 �inei 5Not5 J'c'c
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HDR Engineering, Inc
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, INC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
a
0
3
i ADDITIONAL 5
PERMIT BOUNDARY
INFORMATION (TYP) OOC-05
Kenneth M. Alexander
i
Tract 3
PC 8 PG I GC
c /
Pro/ edlbw follows the Centerline /
0f5m911bra7chOfAtchkop
w /
0
v
5 1 6 1 7 1 8
N SCOPE:
THE PURPOSE OF THESE DRAWINGS IS TO TRANSFER THE OWNERSHIP OF THE MINE AND
UPDATE BOTH THE EXCAVATION PLAN AND RECLAMATION PLAN.
Kathy Lynn Holland
\ 3k. 703, Pg. 553
\ NOTES: QB
\
\ 1. TOPOGRAPHIC SURVEY PROVIDED BY AVIO IMAGE MAPPING SERVICES, INC. ALTA
\ ProPerty[me follows the Cente�ae SURVEY COMPLETED BY LAWRENCE ASSOCIATES DATED AUGUST 14, 2014.
\
John L.ijgg5 \ of5mallbranchorditch, CLEARWATER ENVIRONMENTAL PROVIDED WETLAND LOCATIONS TO LAWRENCE
Bk, 1213, C5?j L
16D g.558
PCBPg ASSOCIATES FOR INCLUSION INTO THEIR SURVEY. ALL SURVEYS ARE
\ \ 3_ [�9 / REFERENCED TO THE NORTH CAROLINA STATE PLANE COORDINATE SYSTEM.
2. PROPERTY BOUNDARY PROVIDED BY LAWRENCE ASSOCIATES DATED
B � SEPTEMBER 5, 2014.
EXISTING MINE PERMIT .00000, �
BOUNDARY TYP 3. GROUNDWATER WELL LOCATIONS PROVIDED BY LAWRENCE ASSOCIATES DATED
SEPTEMBER 5, 2014.
Pro ertyLme follows the Centerine U10 ��\ 4. FLOODPLAIN LOCATION IS FROM LAWRENCE ASSOCIATES AS IDENTIFIED ON
ofsarbrancho tch. °9 i FLOOD INSURANCE RATE MAP FOR LEE COUNTY NORTH CAROLINA, COMMUNITY
a / PANEL NUMBER 3710965400J, DATED SEPTEMBER 6, 2006. LAWRENCE
P,L 107
" _ ASSOCIATES CERTIFIES THAT A PORTION OF THIS PROPERTY IS LOCATED IN A
79 lRn 'r,r SPECIAL FLOOD HAZARD AREA AS DETERMINED BY THE FEDERAL EMERGENCY
MANAGEMENT AGENCY.
5. WETLANDS DELINEATED BY CLEARWATER ENVIRONMENTAL ON AUGUST 8, 2014.
f
j 6. THE WETLANDS AND STREAMS THAT ARE IMPACTED BY THIS PROJECT WILL BE
�,�00 1 PERMITTED THROUGH NC DIVISION OF WATER QUALITY AND MITIGATED AS
26x0 REQUIRED PRIOR TO LAND DISTURBANCE. ESTIMATED IMPACTS INCLUDE:
o t
�8x00 „ arkfr _
2,040 30*F STREAMS
O0 3a • 27,,106 SQ. R FEET 0 (0 62ACRES) OF WETLANDS
ACCORDING TO LAWRENCE ASSOCIATES SURVEY, LEE COUNTY PUBLIC
00 WORKS PROVIDED THE ADDRESSES FOR DRINKING WATER WELL
36x00 \ LOCATIONS AND WATER SERVICES TO ADJOINING PARCELS WITHIN 500
FEET OF THE PROPERTY LINE. LEE COUNTY PUBLIC WORKS PROVIDED
4x00 L-�t Bk.58 , CO ,1�/ 00 g PARCELS SERVED BY COUNTY WATER. PUBLIC WATER SUPPLY
k_�M '6x �40�00 00 (WATERLINE) IS LOCATED ALONG COLON ROAD.
Op o a � 42�0 C.04
8'`O0 0 44+ 7. THE PRIMARY SITE ENTRANCE IS FROM COLON ROAD.
00
70x00 AB 8. SOIL STOCKPILE AREAS TO BE DESIGNED AND PERMITTED AS NEEDED FOR
�2�00 co Q/ri OPERATIONS. AB
Kenneth M. Alexander
Bk. 530, Pg. 5G
PC 8 PG I GC
vsPERMIT BOUNDARY
OOC-05 INFORMATION (TYP)
lk
o _ d
B
EXISTING MINE PERMIT GENERAL MINE INFORMATION
130,00 C \
Co r a� BOUNDARY (TYP) pOC 6 �. THE COLON MINE (PERMIT NO. 53.05) IS LOCATED ON COLON ROAD ABOUT 3
r r r r 32� 04 / C, MILES NORTH OF SANFORD, NC IN LEE COUNTY. CURRENTLY, 371 ACRES OF
00 3 , �\ 6 5 — — — — _ LLLJ
� Q) LAND ARE WITHIN THE MINE PERMIT LIMITS WITH 314 ACRES OF LAND ALLOWED
rr r r r 4�00 i/ U Well \ J TO BE DISTURBED.
APPROXIMATE LIMITS ,/ \ �\ , Q
Z
OF ACTIVE MINING AREA `% Q THE EXISTING BASINS HAVE BEEN FORMED BY MINE EXCAVATION AND THE
� ������ ♦ BASIN NO. / 1
o oo —BASIN NO. 11I c /oN. J � 1 _ — — \ DJ.. OUTLETS CONSIST OF BRICKBAT SECTIONS OR PIPE CULVERTS. HOWEVER,
\\ 4�'�.6c�r�T6ta l— G� 2 \/ WdliamH.Kottca F w SEVEN (7) BASINS HAVE NOT BEEN INSTALLED AT THIS TIME AND HAVE BEEN
r r r r r r r POND " whhamH. ttcamp /\KennethLMoore Bk4G5Pg7 I LJ REDESIGNED AS DRY DETENTION BASINS WITH SLOW DRAINAGE OUTLETS. AT
883,807 5f. / Bk4G5 77G Bk2G4P
r r r Q / _ _ THE MAJORITY OF THE DISTURBANCE AREAS, EXCAVATION EXTENDS BELOW
ooJ �� _ _ _ _ _ _ / �/ \ A ceP9a�5�, \ THE LOWEST LEVEL OF THE BRICKBAT OUTLET SECTION THAT IS PROVIDED FOR
N ` / ADDITIONAL — 4 °io' E 486. f Q THESE BASINS. THE WATER ACCUMULATED BELOW THE BASIN OUTLETS IS
Q rj 8. �,'39', 3 ,.93' "E 3 0.46'
r r PERMIT BOUNDARY aQ e �,:p-� Q DISCHARGED WITH AN IRRIGATION PUMP WITH A MAXIMUM CAPACITY OF 1500
INFORMATION (TYP) OOC-05 4G � ���1 P LU GPM. WATER IS DISCHARGED TO AN ADJACENT MINE / BASIN AREA.
\ ' 30
BASIN �O `�� o r gr Z
NO. 15 .o - , Gp o� (J�� r J UNDISTURBED BUFFERS ARE 50-FT AND ARE PROVIDED ALONG ALL CREEKS.
POWER LINE Q�` _ 2 ALSO, 50-FT UNDISTURBED BUFFERS ARE PROVIDED ALONG ROADWAY AND
o 'ir 9 4-,7 w r RAILROAD RIGHT-OF-WAYS. AT POWER LINES THE MINE EXCAVATION IS STOCKPILE �� ', T RIGHT-OF-WAY PO ^Pr° a U
5hk
;3 -
A
M�.
r /
BASIN NO. 12
BRICKBAT
OUTLET
w. �k. 84 0 BASIN I- MAINTAINED AT LEAST 50-FT FROM THE POWER LINE SUPPORTS.
EXISTING MINE PERMIT o - r NO. 11A Q
BOUNDARY (TYP) EXISTING MINE PERMIT / L r BASINS 17 THROUGH 23 HAVE NOT YET BEEN INSTALLED. THESE BASINS WILL
Q BOUNDARY (TYP) INACTI- INACTIVE
VE BE INSTALLED BEFORE MINING IS CONDUCTED IN THE AREA OF THESE BASINS.
BRICKBAT ff,be, opt MINING AREA MINING AREA THESE BASINS WERE ORIGINALLY DESIGNED TO DISCHARGE AT BRICKBAT
o r mu wena�a>
OUTLET Cab1e r-"1e o„e�,1 (REVEGETATED) s (REVEGETATED)^ OUTLET SECTIONS, BUT HAVE BEEN REDESIGNED AS DRY DETENTION BASINS. QB
!" FLOODPLAIN
(SEE NOTE 4)
BRICKBAT
OUTLET
/ BASIN NO. 13 POND J \
WATER RECHARGE BASIN
LEGEND
_PLC PROPERTY LINE
PLANIMETRICS BASIN NO. 10
— 50' PROPERTY LINE BUFFER
50' WETLANDS/STREAM BUFFER
300' RESIDENCE/GROUNDWATER
WELL BUFFER
OPEN WATER
290 EXISTING TOPOGRAPHY
r r r r r r r r r
r r r r r r r r r
STORMWATER BASIN FROM
EXISTING ROAD
r — r — r — r — r
PRIOR MINING ACTIVITIES
IMPACTED WETLANDS/STREAMS
FLOODPLAIN
APPROXIMATE LIMITS OF ACTIVE
ohe OVERHEAD ELECTRIC
MINING AREA
PARCEL BOUNDARIES
RAILROAD
PROJECT MANAGER M. PLUMMER, P.E.
B 05/2021 REVISED FOR NCDEMLR REVIEW COMMENTS
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
PROJECT NUMBER 10021146-014
♦ • P
:•oF rp�, �ti
SEAL
1888 =
ry q��'�, ,� I N ,,,, �r•/y� psi
• V • p ,A
M. Y AN,..•.
" POND I
S
o ,
ail Roa
Norfolk Southern
100' M
REMAINDER OF
Pin 9654-38-3247-00
21,15± ACRE5 (PER DEED)
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
UPON COMPLETION OF MINING, IT IS ANTICIPATED THAT LAKES WILL BE FORMED
' AT THE MINE EXCAVATIONS. THE BRICKBAT SECTIONS (WHEN PRESENT) WILL
' BE LEVELED WITH A BROAD OUTLET FORMED. THE BERMS WILL ALSO BE
REMOVED. FOR THE DRY DETENTION BASINS, THE OUTLET STRUCTURES AND
BERMS WILL BE REMOVED WHEN THE UPSTREAM DRAINAGE AREAS HAVE BEEN
STABILIZED WITH VEGETATION. ROADWAYS ARE FLUSH WITH THE GROUND OR
ARE ELEVATED ABOVE NATURAL GROUND BY EMBANKMENT FILL.
-------------------------------------
ACREAGE TABLE
CATEGORY
AFFECTED ACREAGE
TAILINGS / SEDIMENT PONDS
28.5
STOCKPILES
7.4
WASTEPILES
5.0
PROCESSING AREA / HAUL ROADS
17.5
MINE EXCAVATION
255.6
OTHER
0.0
TOTAL DISTURBED ACREAGE
314.0
MINE MAP
(EXISTING CONDITIONS)
0 1" 2" FILENAME OOG-02.dwg
SCALE 1" = 300'
A
SHEET
OOG-02
9
C
.1
a
0

1
7
n
Fiber Optic
Cable
�a
44
.Q
POND
POND
WATER RECHARGE BASIN
r..
2 I 3 4 5 16
MATCH LINE A -A - SEE SHEET OOC-02
------------------------------- 7 �—
William T Reaves, Jr.
PC 9 Pg 238
Michael M. Reaves
PC 9 Pg 238 r
5k 102 Pg 157 f
J
6 I Michael M. Reaves
PC 9 Pg 238 �
15k 119 Pg 664
_
Q Daisy D and Cullen R PA50e i
6K 3 12 Pg 875
\ / \ William H. Kottca I
state
William H. Kottcamp Kenneth L Moore 5k 465 Pg 77 I Life E
\ Emma C Reaves ichael M Reaves
Bk 465 Pg 776 // --�lG4 N -Ll7 I — — — — — Bk 1 19 P 66 PC 6 Pg 67
r Alvin M Reaves °7
PC 6 Pg 87
POND
z 7. li,,-tT
o --
INACTIVE
MINING AREA
(REVEGETATED)
/ 1
HDR Engineering, Inc
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
N
BASIN
NO. 11
M-3?47
r� BASIN
NO. 10
r — V PROPOSED LIMITS
OF MINING (TYP.) /
FUTURE i
MINE AREA
DIVERSION 1
BERM (TYP.)) OOC-06
SLOPE GROUND
° TOWARDS BASIN NO. 14
- V
kC855 Road
STOCKPILE
�:
STOCKPILE
i 50' UNDISTURBED
BUFFER (TYP.)
FA
74-- 0, 020 1"! d"', �,- '22.1,0014,
Ira
KIN
oil
14
ia P-
i
-
VMy��
M"i�w_
Norfolk Souther
100' RIW
REMAINDER OF
Pin 9654-36-3247-00
1.15± ACRES (PER DEED)
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
o a d n57 OG?) �o
LEGEND
�PL
PROPERTY LINE
—
50' PROPERTY LINE BUFFER
50' WETLANDS/STREAM BUFFER
LOD
LIMITS OF DISTURBANCE
300' RESIDENCE/GROUNDWATER
WELL BUFFER
EXISTING TOPOGRAPHY
EXISTING ROAD
OVERHEAD ELECTRIC
ohe
PARCEL BOUNDARIES
RAILROAD
— —
CELL BOUNDARIES
PROJECT MANAGER M. PLUMMER, P.E.
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
�N CAR0'�•
o�..•oF � s s io • tt;'•�.
SEAL
YPN��,`,,,.
PLANIMETRICS
OPEN WATER
r r r r r r r r r
r r r r r r r r r r STORMWATER BASIN FROM
r r r r r r r r
PRIOR MINING ACTIVITIES
FLOODPLAIN
PROPOSED SEDIMENT BASIN
— — > — — > — — > — PROPOSED DIVERSION BERM
BASIN DRAINAGE LIMITS
PROPOSED STORMWATER FLOW
DIRECTION DURING MINING
BASIN NO. 12
BRICKBAT
OUTLET
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
1 � o
o_
0
BASIN NO. 15 —
(SEE NOTE 1)—
INACTIVE
MINING AREA
l
N
4,10
e
POWER LINE
RIGHT-OF-WAY
❑C
C
L
1. EXISTING SEDIMENT BASINS 14, 15, AND 16 SHALL USE EXISTING
PONDED VOLUME TO TREAT STORMWATER FLOWS. I A
MAINTENANCE CONSIDERATIONS
1. ALL EROSION AND SEDIMENT CONTROL PRACTICES SHALL BE
CHECKED FOR STABILITY AND OPERATION FOLLOWING EVERY
RUNOFF -PRODUCING RAINFALL, BUT IN NO CASE SHOULD IT BE
DONE LESS THAN ONCE WEEKLY. ANY NEEDED REPAIRS WILL BE
MADE IMMEDIATELY TO MAINTAIN ALL PRACTICES AS DESIGNED.
2. SEDIMENT BASINS 14, 15, AND 16 WILL BE CLEANED OUT WHEN
DISCHARGE CRITERIA CANNOT BE MET.
MINE DEVELOPMENT PLAN
(1 OF 2)
0 1" 2" FILENAME 00C-01.dwg
SCALE 1" = 200'
SHEET
OOC-01
PROJECT NUMBER 110021146-014

�Ln
m
o �
cn �
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1
AdJoiner Fence
Encroaches
5y I G.7
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X X X X ,,- X L
Kenneth M. Alexander
Tract I
PC 8 PG I GC
Db. 530, Pg. 5G
Q
_ J
0
g
00
0
0
o
a
i
3
3
a
U
E
z°
i.�
ofM
E�
~ 50' UNDISTURBED BUFFER (TYP.)
N I
0
N
0
rim
WI
0
0
V
Oxpp<�r
Ox00
r�
Kenneth M. Alexander
Tract 3
PC 8 PG I GC /
I--- /
c
L /
S Property Line f011Ow5 the Centerline l l
Of small branch or ditch.
TOP OF BERM EL. 268.0 /
( /
DISCHARGE INV. EL.=258.0
BASIN NO. 23 /
MINIMUM BOTTOM /
DIMENSIONS /
p 125' X 250'
a
\.00
8*00
1�X� �
W N0
Road
3 I 4
Kenneth M. Alexander
bk. 530, Pg. 5G
PC 8 PG I GC
I
DISCHARGE INV. EL.=256.0
0
TOP OF BERM EL.=264.0 11
C) Md
BASIN NO. 22 DISCHARGE INV. EL.=252.0
MINIMUM BOTTOM
DIMENSIONS
TOP OF BERM EL.=262.0
100' X 200'
M� BASIN NO. 21
MINIMUM BOTTOM
4O DIMENSIONS
170' X 340'
00
M 1 DIVERSION
OOC-05 BERM (TYP.)
!•i
012
•-MIME!
>� ��+ �1i ii i•
HDR Engineering, Inc
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
N
18'`00
Y00
v
d �28'x0
5
John L. Riggs
l5k. 1213, Pg. 558
PC8Pg IGD
5 SEDIMENT BASIN
OOC-06 SCHEDULE
DISCHARGE INV. EL.=248.0
TOP OF BERM EL.=258.0
— BASIN NO. 20
MINIMUM BOTTOM
DIMENSIONS
124' X 248'
~ Property Line follows the Centerline
Of small branch or ditch.
O
32X00
3q
NINE,,••�•♦ ..
..�
PROJECT MANAGER M. PLUMMER, P.E.
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
Y.
0
32+00 00C,p4
2 EXCAVATION AT 34'`00
OOC-05 POWER POLE
TOWER (TYP.)
�N CA/?
ssi0"%t;'•�.
SEAL �7 _
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..............
N��,`,,,.
6 7 8
LAND DISTURBANCE SEQUENCE BASIN CONSTRUCTION NOTES
1. CONTINUE MINING UPSLOPE OF BASINS NO. 14, 15, 1. SITE PREPARATIONS - CLEAR, GRUB, AND STRIP
AND 16. TOPSOIL FROM AREAS UNDER THE EMBANKMENT
TO REMOVE TREES, VEGETATION, ROOTS, AND
2. INSTALL BASINS NO. 17 THROUGH 23 AS NEEDED. OTHER OBJECTIONABLE MATERIAL. DELAY
CLEARING THE POOL AREA UNTIL THE DAM IS
3. CONSTRUCT DIVERSION BERMS NEEDED TO COMPLETE AND THEN REMOVE BRUSH, TREES,
DIVERT STORMWATER TO BASINS NO. 17 AND 23. AND OTHER OBJECTIONABLE MATERIALS TO
REVEGETATE BERMS IMMEDIATELY OR NO LATER FACILITATE SEDIMENT CLEANOUT. STOCKPILE ALL
THAN 7 DAYS AFTER EACH BERM SECTION IS TOPSOIL OR SOIL CONTAINING ORGANIC MATTER
CONSTRUCTED. FOR USE ON THE OUTER SHELL OF THE
EMBANKMENT TO FACILITATE ESTABLISHMENT.
4. AT INACTIVE REVEGETATED AREAS, VERIFY PLACE TEMPORARY SEDIMENT CONTROL D
EROSION CONTROL STRUCTURES ARE IN -PLACE, MEASURES BELOW THE BASIN AS NEEDED.
AND REPAIR AS NEEDED PRIOR TO REDISTURBING
THESE AREAS. 2. CUT-OFF TRENCH - EXCAVATE A CUT-OFF TRENCH
ALONG THE CENTER LINE OF THE EARTH FILL
EMBANKMENT. CUT THE TRENCH TO STABLE SOIL
MATERIAL, BUT IN NO CASE MAKE IT LESS THAN 2
NFT DEEP. THE CUT-OFF TRENCH MUST EXTEND
Kathy Lynn INTO BOTH ABUTMENTS TO AT LEAST THE
Kann Holland
\ Ly P 853 ELEVATION OF THE RISER CREST. MAKE THE
\ g MINIMUM BOTTOM WIDTH WIDE ENOUGH TO
\ PERMIT OPERATION OF EXCAVATION AND
\ COMPACTION EQUIPMENT, BUT IN NO CASE LESS
\ DISCHARGE THAN 2 FT. MAKE SIDE SLOPES OF THE TRENCH NO
\ INV. EL.=230.0 STEEPER THAN 1 A. COMPACTION REQUIREMENTS
\ ARE THE SAME AS THOSE FOR THE EMBANKMENT.
\ TOP OF BERM KEEP THE TRENCH DRY DURING BACKFILLING AND
\
\ EL. 238.0 Pro Z117efollowsthe Centerdne COMPACTION OPERATIONS.
\ ofsm llbrdnchord b' BASIN NO. 18
\ MINIMUM BOTTOM 3. EMBANKMENT - FILL MATERIAL SHOULD BE CLEAN
\ DIMENSION MINERAL SOIL, FREE OF ROOTS, WOODY
\ \ 100' X 200' VEGETATION, ROCKS, AD OTHER OBJECTIONABLE
r r— _/ MATERIAL. SCARIFY AREAS ON WHICH FILL IS TO
- J BE PLACED BEFORE PLACING FILL. COMPACT
SOILS TO MINIMUM 95% STANDARD PROCTOR
MAXIMUM DRY DENSITY IN ACCORDANCE WITH
ASTM D698. PLACE FILL MATERIAL IN 6" TO 8"
TOP OF BERM EL.=256.0 CONTINUOUS LAYERS OVER THE ENTIRE LENGTH
O OF THE FILL AREA AND COMPACT IT. COMPACTION
BASIN NO. 19 MAY BE OBTAINED BY ROUTING THE
MINIMUM BOTTOM CONSTRUCTION HAULING EQUIPMENT OVER THE C
DIMENSIONS FILL SO THAT THE ENTIRE SURFACE OF EACH
160' X 320' LAYER IS TRAVERSED BY AT LEAST ONE WHEEL OR
DISCHARGE TREAD TRACK OF HEAVY EQUIPMENT, OR A
INV. EL.=246.0 J COMPACTOR MAY BE USED. CONSTRUCT THE
EMBANKMENT TO AN ELEVATION 10% HIGHER THAN
THE DESIGN HEIGHT TO ALLOW FOR SETTLING.
4. CONDUIT SPILLWAYS - EMBED RISER IN CONCRETE
AS SHOWN ON DETAIL. SECURELY ATTACH THE
RISER TO THE BARREL TO MAKE A WATERTIGHT
D STRUCTURAL CONNECTION. SECURE ALL
CONNECTIONS BETWEEN BARREL SECTIONS BY
APPROVED WATERTIGHT ASSEMBLIES. PLACE THE
BARREL ON A FIRM, SMOOTH FOUNDATION OF
IMPERVIOUS SOIL. DO NOT USE PERVIOUS
Q MATERIAL SUCH AS SAND, GRAVEL, OR CRUSHED
STONE AS BACKFILL AROUND THE PIPE OR
ANTI -SEEP COLLARS.
PLACE THE FILL MATERIAL AROUND THE PIPE
O i SPILLWAY IN 4 INCH LAYERS, AND COMPACT IT
UNDER AND AROUND THE PIPE TO AT LEAST THE
a SAME DENSITY AS THE ADJACENT EMBANKMENT.
CARE MUST BE TAKEN NOT TO RAISE THE PIPE
/ FROM FIRM CONTACT WITH ITS FOUNDATION WHEN
COMPACTING UNDER THE PIPE HAUNCHES.
PLACE A MINIMUM DEPTH OF 2 FT OF COMPACTED
LEGEND
+00 BACKFILL OVER THE PIPE SPILLWAY BEFORE
CROSSING IT WITH CONSTRUCTION EQUIPMENT.
38xp0 �PLPROPERTY LINE ANCHOR THE RISER IN PLACE WITH CONCRETE OR B
50' PROPERTY LINE BUFFER OTHER SATISFACTORY MEANS TO PREVENT
40, �/\ FLOTATION. IN NO CASE SHOULD THE PIPE
E 50' WETLANDS/STREAM BUFFER CONDUIT BE INSTALLED BY CUTTING A TRENCH
/ 42+00 00C,04 SOD LIMITS OF DISTURBANCE THROUGH THE DAM AFTER THE EMBANKMENT IS
44X00 300' RESIDENCE/GROUNDWATER
WELL BUFFER 5. INLETS -DISCHARGE WATER INTO THE BASIN IN A
MANNER TO PREVENT EROSION. USE DIVERSIONS
290 EXISTING TOPOGRAPHY WITH OUTLET PROTECTION TO DIVERT SEDIMENT
LADEN WATER TO THE UPPER END OF THE POOL
EXISTING ROAD AREA TO IMPROVE BASIN TRAP EFFICIENCY.
ohe OVERHEAD ELECTRIC 6. EROSION CONTROL - CONSTRUCT THE STRUCTURE
PARCEL BOUNDARIES
SO THAT THE DISTURBED AREA IS MINIMIZED.
DIVERT SURFACE WATER AWAY FROM BARE
AREAS. COMPLETE THE EMBANKMENT BEFORE
RAILROAD
THE AREA IS CLEARED. STABILIZE THE
EMERGENCY SPILLWAY EMBANKMENT AND ALL
— —
CELL BOUNDARIES
OTHER DISTURBED AREAS ABOVE THE CREST OF
THE PRINCIPAL SPILLWAY IMMEDIATELY AFTER
PLANIMETRICS
CONSTRUCTION.
MAINTENANCE CONSIDERATIONS
OPEN WATER
INSPECT THE SEDIMENT BASINS AT LEAST WEEKLY AND
AFTER EACH SIGNIFICANT (1/2 INCH OR GREATER)
RAINFALL EVENT AND REPAIR IMMEDIATELY. REMOVE
r — r r — r — r
r r r r r r r r r
STORMWATER BASIN FROM
SEDIMENT AND RESTORE THE BASIN TO ITS ORIGINAL
r r r r r r r r r
PRIOR MINING ACTIVITIES
DIMENSIONS WHEN IT ACCUMULATES TO ONE-HALF THE
DESIGN DEPTH. PLACE REMOVED SEDIMENT IN AN
,q
FLOODPLAIN
AREA WITH SEDIMENT CONTROLS.
CHECK EMBANKMENT, SPILLWAYS, AND OUTLET FOR
EROSION DAMAGE, AND INSPECT THE EMBANKMENT
PROPOSED SEDIMENT BASIN
FOR PIPING AND SETTLEMENT. MAKE ALL NECESSARY
REPAIRS IMMEDIATELY. REMOVE ALL TRASH AND
— — > — — > — — > —
PROPOSED DIVERSION BERM
OTHER DEBRIS FROM THE RISER AND POOL AREA.
BASIN DRAINAGE LIMITS
-------- 0—
PROPOSED STORMWATER FLOW
DIRECTION DURING MINING
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
MINE DEVELOPMENT PLAN
(2 OF 2)
0 1" 2" FILENAME OOC-02.dwg
SCALE 1" = 200'
SHEET
OOC-02
PROJECT NUMBER 110021146-014

HDR Engineering, Inc.
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
B 05/2021 REVISED FOR NCDEMLR REVIEW COMMENTS
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
PROJECT MANAGER M. PLUMMER, P.E.
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
PROJECT NUMBER 1 10021146-014
Ao N C q R
04-�oF
SEAL
8!8V87.
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M. Y AN,....
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
MINE RECLAMATION PLAN
0 1" 2" FILENAME OOC-03.dwg
SCALE 1 1" = 300'
SHEET
OOC-03

1
320
300
280
260
240
220
0
N
CD
N
0+00 2+00
SECTION
HORIZ: 1" = 150' VERT: 1" = 30'
., _
> 320
' 300
280
> 260
240
> 220
� N
0+00 2+00
' SECTION
HORIZ: 1" = 150' VERT: 1" = 30'
360
340
z 320
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300
'All
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0
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2 3
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4+00 6+00 8+00 10+00 12+00 14+00 16+00 18+00 20+00 22+00 24+00 26+00 28+00 30+00
rT*""`\
320
300
280
260
240
220
200
32+00
4+00 6+00 8+00 10+00 12+00 14+00 16+00 18+00 20+00 22+00 24+00 26+00 28+00 30+00 32+00 34+00 36+00 38+00
rB
4+00 6+00 8+00 10+00 12+00 14+00 16+00 18+00 20+00 22+00 24+00 26+00 28+00
r7"*N
HDR Engineering, Inc.
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
B 05/2021 REVISED FOR NCDEMLR REVIEW COMMENTS
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
PROJECT MANAGER M. PLUMMER, P.E.
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
CAR `��•
r'
SEAL 9r 7 Z
1888
•F
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Irrrr I.C1h N 'r•/y� � V •
a
M. Y AN,..•.
360
340
320
300
280
260
240
0108Zi
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
e
320
300
280
260
240
220
200
N
N
40+00
8
NOTES:
1. CONCEPTUAL POST -MINING SURFACE
REPRESENTS AN ASSUMED AVERAGE DEPTH OF
EXCAVATION OF 10'. VARIATIONS IN MINING DEPTH
B ARE ANTICIPATED.
SIZE AND DEPTHS OF PROPOSED
POST -RECLAMATION PONDS AND LAKES MAY
FROM THOSE SHOWN BASED ON MINING
CONDITIONS ENCOUNTERED.
SITE CROSS SECTIONS
0 1" 2" FILENAME OOC-04.dwg
SCALE H: 1 "=150' V: 1 "=30'
SHEET
OOC-04
C
L
V
PROJECT NUMBER 110021146-014

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HDR Engineering, Inc.
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
B 05/2021 REVISED FOR NCDEMLR REVIEW COMMENTS
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
PROJECT MANAGER M. PLUMMER, P.E.
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
PROJECT NUMBER 1 10021146-014
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
EROSION AND SEDIMENTATION
CONTROL DETAILS
0 1" 2" FILENAME OOC-05.dwg SHEET
SCALE AS NOTED 00 C -O 5

HDR Engineering, Inc.
of the Carolinas
440 S. Church St. Suite 1000
Charlotte, NC 28202-2075
704.338.6700
N.C.B.E.L.S. License Number F-0116
A 03/2021 ISSUED FOR APPROVAL
ISSUE DATE DESCRIPTION
PROJECT MANAGER M. PLUMMER, P.E.
DESIGNED BY T. YANOSCHAK, P.E.
DRAWN BY D. DIXON
CHECKED BY
PROJECT NUMBER 1 10021146-014
°voFEss;o°�; •,
2 Q4
SEAL p
COLON MINE SITE
MINE PERMIT MODIFICATION
SANFORD, NC
SEDIMENT BASIN DETAILS
0 1" 2° FILENAME OOC-06.dwg
SCALE AS NOTED
SHEET
OOC-06