19-08 Modification 2020 - Mine Maps

Legend
Intermittent Stream
------
50' Undisturbed Buffers for Intermittent Streams
��-•�
Ditch
Topographic Lines with Designated Elevation
— — — — — —=
Current Affected/Bonded Area
--------------
Proposed Addition To Affected/Bonded Area
— — — — — — -
Adjacent Property Lines
11omm�
Property Lines & Permit Limits
Soil Berm
GENERAL PROJECT DISCUSSION
The Brickhaven Mine #2 Tract B (Permit No. 19-08) located in Chatham County, North
Carolina, contains 348 acres of permitted land. Currently, the permitted allowable
affected acreage is 94 acres. It is proposed to add an additional 50 acres of affected
acreage, for a total of 144 acres of allowable affected acreage. This additional acreage is
located within the mining permit limits, and no change to the total permitted area is
proposed.
Mining will continue as permitted in the existing mine area, to the east of existing Basin
K. Erosion control for the proposed new mining area will consist of four (4) new
sediment basins (Basins L, M, N, and O). Earthen berms will be constructed to divert
stormwater runoff to these basins. No mining will occur north of the Progress Energy
Easement that runs through the property.
After mining activities are complete, the disturbed areas will be sloped for positive
drainage, re -vegetated with grasses, and the erosion control structures will be removed.
Some of the haul roads will remain in -place to include from SR-1924 to the current
stockpile areas. The ditches for these roadways (if present) are presently grassed and
stable. The buildings or sheds will be removed. The 5'x5' riser structure and outlet
pipe will remain at existing Basin K.
Note: Sediment basins and other erosion control devices
cannot be removed until permanent ground cover has
been established.
\
F
t r 1 3301ChathaBm Ridge ISM
3301 Benson R Suite 601
Property Line'.
/
Raleigh; NC27609
/
Mine Permit Limits
1
1
1 I
/
� 1 I
1
1
II
2%p
1 1
1 /
I
1
1 1
265
230�
-26p - -
NOTE: NO DISTURBANCE PROPOSED NORTH OF PROGRESS ENERGY EASEMENT
26
aS
y/ i 4SOv6
411
P isO t4
PROPOSED
BASIN O
SIDE
1
(Q
1
A 1
G r^
Au t
1`
.7
o�
t
re
a t
t t
lea'
A 1
r t
i
fa.
A
50' Undisturbed Buller \
\ 5
JI�PRWpSE PPrape
R.
SECpNppRV PMMER.ND SPILLWRV MRRV WiLEt
Sp
V20 Colon Russell Jr & Ola
781 Mo
ili scum, NC 27559
Drtchlin5< Do.
240
�� I� --- -PROPOSED ADDITIONe" 35-- r�Ev,. A
!J i
/`- _ Colon Russell Jr&OIaT to
-PRPROPOSED i 1781 Moncme Flatesood Rd
SILT FENCE I - TO AFFECTED/BONDED AREA YMmfgure,_NC 27559
SECONDARY (50 ACRES)
11s'6 �; I �+ A A
secoeoanv-' — iii I Y.r � 1.; A
/
SPILLWAY @AFF6F$_ { 85 I
Iw
/ PROPOSED II
_
BASIN L
1
50' Unexcavated Suffer
PiAND
' ARY D 1
PRIMMARY ON AND
�l _ . 51,
1.8
.0 [otkprle Am
I(
Chatham Ridge LLC I
3301 Benson Dr Suite 1
Raleigh, NC 27609
III
ICI
John & Rosie Smith
1751 Moncure Harwood Rd
Mnncum, NC 27559
ld Brown
c ap r //� 11775Moneure Hamood Rd
230 e nru�o�r
• \ Movcure, NC 27559
Stockpile Area
Existing Culvert 2 5 "Re,
` George Down _
Pum 2666 Corinth
Existing ,, , , f / Monroe, NC 275
Culvert,
z
/ 260 L — — — — — — — —
I 1 � � � � ,, / I — — -
i -
fo
I
2,55 ' �1� EXISTING
25Q---- ii' Netter classenipmp.... 3T Rep
]B Lhint20)sl crest EI. 214psli 'o140
a .240
P\ MINE AREA
(1E'Lx9'Wx22"Thick), 9 ,Bottom Width 10 er 213D0' L F}j
I
I< "e mwnx n�' _ ter/ Gate
t �BasiFn
P) i
Mn, 10 21e.00 f� del
ToP fin. 10' W Ne
owlet simafUre ' \�OjrCh / ;�
Topol ware. 212.00Conn,
Top of Riser=212.00
Ishro24"Rep - (6)5" Skimmers, 21100'
Colr Baffle— �- - -� t24' BOP L'85' 235- /
Foreds, Weir SPillue, - I''eri ou12�200' J /
Diversion Ditch 230 -
Netter ClassBAiprap - /
�
TOP=216.DD'
Grade Area to Flow in Direction of Arrows p '
_ �` / Shed \DAch Invert 221.00
I f
Otfi" /
i
See Sheet 2 For
�k\ •• Note: Area of former Bnsln 1. /
ti Basin K Details \ /
\ ' to be seeded as per vegetation plan.
py_ �•V �r .au Diversion Ditch
Exnling Road
---
- Gate2-15 Carolina Power & Light
! v 50' Unexcavat d Buffer % Raleigh NC 760 e A _
i
\ :" • Y
u
Scale: 1" = 300'
CONSTRUCTION SEQUENCE
1. Before mining begins, install the temporary diversion berms/silt fence, and construct
the proposed sediment basins.. Prior to constructionofthe basins, install silt fence and
stone outlets down -slope of the basins. Install the stone outlets at the outlet pipe locations
for the proposed basins. Remove silt fence after basins have been constructed and
vegetation has been established on berms. Clearly only as much land as necessary
to install the erosion control measures.
2. Begin clearing, grubbing, and soil excavation. Extend diversion berms as needed to
capture uplsope disturbance. Stabilize site areas as excavation is completed.
3. Revegetate as per the vegetation schedule. Diversion berms shall be stabilized
within 7 days of construction.
Note: Prior to land disturbance, locate and establish 50' stream buffers.
No disturbance shall occur within the 50' stream buffers.
Note: See Sheet 3 for Basin Details, Outlet Protection, and other
Erosion Control Details. Skimmers shall be Faircloth
manufactured. See Sheet 5 for skimmer information
including size, flow rates, and insiallallon)maintenance
specifications.
I) GroundStabilization-
Site Al
Stabilitv[ivn
Stabilization Time
Description
'fire Frame
Frame Hcce Lions
Perim t 1 il,.s,
sr l dish s
7 days
Note
n 1-1t
I ligh Qualm
Water(HQw)
7days
Now
Zones
nski are 10' or
• Slopes steeper
7 days
less in length and are
than 3:1
not steeper than 2:1,
14 does are allowed.
• Shopti I or
7-days for slopes
Outlet
14 days
greater than 50 feet
in length
All >th rarcas
None
wilt) slopes Flatter
l4 days
(except for
than 4:1
perimeters and
1iW Zones)
"Est u i ns or onto nay be approved by the permitting offid ly
based uin amber or emer 'itc,pe,dic conditions that make emnpbmme
impmciicable,"(Sall
lwrll Bl2)l nil
rr.� n n7n
is a

BASIN K DETAILS
Soil Berm Cross -Section
3' to 5'
2 2
1 � 1
Yto7'
L Note: Height of berm will increase at brickbat section. \
Collection Berm Specifications
1. Construct berm by placement of overburden.
2. Prior to placement of materials for berm formation, cut vegetation
nearly flush with ground (if applicable).
3. Compact materials in lft. lifts by construction traffic.
25-
- 2.
4' TA
Typical Roadway
Cross -Section
(NTS)
- - - 30
30'
SKIMMER BASIN DETAIL
storage zone Gross -Section
View
SEDIMENT BASIN SCHEDULE Design Elevations (ft. EL)
( ) Inflow Surface Area, square ft. Storage Volume, Cubic Ft.
Watershe� _ Skimmer tikimmer 36" RCP Top of Emergency
Precas[5'x5'
erm
- 70.13 126,23411-140,522 OinShca ii 21 O�t 212.00' 207.50' B6.0 Spillway
Basta Area lg, R urredl') Provided Dist, acre R tured2 Provided _ Invert
_ acres O efs Riser Invert ]ever[ Out
K 70.13E 203.45 66,121 81,634 t 1
216. W' 214.50'
(1) Required Surface Area for Skimmer Basins based on 325 sf per efs of Q10 peak inflow.
(2) Required Volume is based on 1800 cf/ac. of disturbed area
(3) Six (6) 5" Skimmers will be used.
1 �
PVC End
as,
SKIMMER DETAIL
Arm Assembly
'C' Endoiure
PERSPECTIVE VIEW Wdo,, Erne,
Ift
PVC Elbow PVC Venn
Pipe \
QrkerS%On D ��
/ o\
c .c \' .d
e
Precast Riser Outlet Structure
Six 5' Square
Top of Riser = 212.00'
(6) 5" Skimmer Attachment = 211.00'
36" RCP Invert 208.00
36" RCP
Invert Out = 207.50'
of Berm = 216.00'
2�6po --®' p01 (211 po1/
t q b0 ..t 5to0age
10' Wide Emergency Spillway
wl Erosion Control Fabric Liner
Crest El. = 214.50'
Scale: 1" = 60'
PVC Tea Pvc 's PVC PR V �.� _' / A/ _i .�
}" Holu N y PVC Tee orifice
UMwside rkxi0le Pkie
HPR
O Inv, Out- 212.00'
Bottum$_face
END VIEW FRONT VIEW ----- -- 24" RCP J
- -
48" RCP /
Top of Berm,= 276 on - -' Inv. Out = 211.50 -��
Skimmer Basin Construction Specifications
I. 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.
Place temporary sediment control measures below basin as needed.
2. Ensure that fill material for the embankment is free of roots, woody vegetation, organic
matter, and other objectionable material. Place the fell in lifts not to exceed 9 inches, and
machine compact it. Over fill the embankment 6 inches to allow for settlement.
3. Shape the basin m the specified dimensions. Prevent the skimming device from settling
into the mud by excavating a shallow pit under the skimmer or providing a low support
under the skimmer of stone or timber.
4. Place the barrel (4 -inch Sched. 40 PVC pipe) on a firm, smooth foundation of
impervious soil. Do not use pervious material such as sand, gravel, or crushed stone
around the pipe. Place the fill material around the pipe spillway in 4-inch layers and
compact it under and around 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 compacting under the pipe haunches.
5. Assemble the skimmer following the manufacturer's instructions.
6. Lay the assembled skimmer on the bottom of the basin with the flexiblejoint at the
ialato6 the harmidi pi Anti nhrt a dpm9t ball hit
skimmer over the excavated pit or support. Be sure to attach a rope w the skimmer and
anchor it to the side of the basin. This will be used to pull the skimmer to the side for
maintenance.
7 Earthen Spillways- Install the spillway in undisturbed soil to the greatest extent
possible. The spillway should be lined with laminated plastic or impermeable geotextile
fabric. The fabric must be wide and long enough to cover the bottom and sides and
extend onto the top of the dam for anchoring in a trench. The 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 seetiori should overlap the lower sections) so that water cannot flow
under the fabric. 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. Ensure that the
diversion berms will have positive drainage to the upper en d of the basin.
9. Erosion Control- Construct the structure so that the disturbed area is minimized. Divert
surface water away from bare areas. Complete the embankment before the area is cleared.
Stabilize the emergency spillway embankment and all other disturbed ar eas above the
Skimmer Basin Maintenance
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 the basin
m its original dimensions when sediment accumulates to one-half the height of the first
baffle. Pull the skimmer to one side so that the sediment underneath it can be excavated.
Excavate the sediment from the entire basin, not just around the skimmer or the first cell.
Make sure vegetation growing in the bottom of the basin 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.
If the skimmer is clogged with trash and there is water in the basin, usually jerking 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 t he basin and remove the debris.
Also check the orifice inside the skimmer to see if it is clogged; if so remove the debris.
If the skimmer arm or barrel pipe is clogged, the orifice can be removed and the
obstruction cleared with a plumbers snake or by flushing with water. Be sure and replace
the orifice before repositioning the skimmer.
Check the fabric lined spillway for damage and make any re quired repairs with fabric that
spans the full width of the spillway. Check the embank ment, spillways, and outlet for
erosion damage, and inspect the embankment for piping and settlement Make all
necessary repairs immediately. Remove all trash and other debris from the skimmer and
pool areas.
BAFFLE DETAILS FOR SEDIMENT BASIN (NTS)
PFRSEPECTIVE VIEW
CROSS-SECTION BAFFLE (NTS)
Support Post, 24' into Stake to
bottom or side
Support rope to wire iT �� IL
to prevent sagging 4
.it mesh or similar, stapled or
trenched into bottom or side
Porous Baffle Specifications
1. Grade the basin so that the bottomis at equal elevation.
2. Steel posts shall be driven to at least 24 inches below ground surface and spaced at 4 ft. centers.
3. Top of fabric shall be at least 6 inches above stone spillway elevation and 2 inches lower than
berm elevation.
4. Bottom and aides of fabric shall be anchored in a 6 inch trench of pinned with 8 inch long erosion
control matting staples.
5. The baffles shalt be composed of coir fiber mating with the following specifications.
Car Fiber Mat Specifications
100%cocount fiber (coin twine woven into high strength main
Thickness: 0,30 in. minimum
Tensile Suength: 1348s 6261f/ft minimum
Elongation: 34% x 38%maximum
Flexibility (mg -cm): 65030 x 29590
Flow yet ocity: Observed D ft/see
Weight: 20 oa/SY
Size: 6.6 x 164 ft (120 SY)
"C" Factor: 0.002
Open Area (measured): 50%
Note: Porous baffles am to be tied back into basin embankments
at botmm and sides of the weir.
OUTLET PROTECTION DETAILS
L!
t
-/
Velocity I3issipator 1
ss° RCP � �IVCD©T iClass 'EY- Ri ra g'
In: 18'L*�Wxa2" Thic
18'
RE CLE_ IVs-
OCT 2 6 2G?"
MINING PROGt Ai

SEDIMENT BASIN W/ SKIMMER DETAIL
TOP OF EMBANKMENT
RISER STRUCTURE
TRASH RACK a' n11nt ' �yt110,
Pipe Connections
raEeaoaaD- 11 mAtII�Iltf-lilt^ EMERGENCY SPILLWAY - Ensure that all conduit connections are watertight. Rod and
1'MIN- R11 i 1 11RIII U QII lug type connector bands with gaskets are referred for corrugated
SKIMMER -� . 04�`l`� pit�llll�`11N=`Afl��l�lt�&}i�1+9 , S'sl® g p gated
N`F 111I11�HH=ll�l1111� 11�^Ii�1 u1111it� �Fyr metal pipe to assure watertightness under maximum loading and internal
t`� 11i[� y ltll �1iJi�tl�1(�1fgvot-yji tC9f� 1f- Njt_1111;`l `Lt pressure. Do not use dimple universal connectors under an
qU�+li1�11� Iill iCii�111i�Fa�� I1 1191-1111�IlMlllkMIM p P (universal) y
r BARREL circumstances.
1j �j-PIPE
Trash guard
-It is important that a suitable trash guard be installed to prevent the riser
CLASS B STONE PAD and barrel pipes from becoming clogged. Install a trash guard on the
4' X 4' X 1' MIN. CUT-OFF
( ) ANTIFLO A ION BLOCK SECTIONAL VIEW � ANTI -SEEP top of the riser to prevent trash and other debris from clogging the conduit.
TRENCH STABILIZED
COLLAR OUTLET A combination anti -vortex device and trash guard improves the efficiency
2' DEEP of the principal spillway and protects against trash intake.
1.1
Protection against piping 11
NOTES - Install at least one watertight antiseep collar with a minimum projection
1. SEED AND PLACE MATTING FOR EROSION CONTROL ON INTERIOR AND EXTERIOR SIDESLOPES. of 1.5 feet around the barrel of principal spillway conduits, 8 inches or
2. INSTALL A MINIMUM OF 3 COIR FIBER BAFFLES IN ACCORDANCE WITH PRACTICE STANDARD 6.65. larger in diameter. Locate the anti -seep collar slightly downstream from
3. INSTALL SKIMMER AND COUPLING TO RISER STRUCTURE OR DIRECTLY INTO EMBANKMENT 1 Fr. FROM BOTTOM OF BASIN. the dam center line. A properly designed drainage diaphragm installed
4. THE ARM PIPE SHALL HAVE A MINIMUM LENGTH OF 6 FT. BETWEEN THE SKIMMER AND COUPLING. NOT TO SCALE around the barrel may be used instead of an anti -seep collar when it is
appropriate.
Proposed Sediment Basin Calculations
- - -Design Elevations (ft. EL)
ISurface Area at normal pool, - -- _ Skimmer - -� - - Inlet -OutletI-
T_-
Watershed Average
Inflow square ft. Storage Volume. Cubic Ft. Inlet & I Draw Down T s)Crest of
Area erage Te, t) Time, Riser Dia., Barrel Dia., Height of Invert of L Invert of Top of Top of 2-yr 24-hr 10-yr 24-hr 25-yr 24-hr
Basin Q cfs (a) Area q . (2) Orifice,
e, hours Secondary Storm Elev. Storm Elev. Storm Elev.
( ) q inches inches Berm, ft. Hie tat HoP pental Riser Berm -
I I- � 24.00 CN minutes 1°' R55,119 �'7,800d Dist., acre Re cored Provided I III Spillway
-
94 15.2 126.71 24.00 43,200 7 59,384 4 70.8 16" 12" 223.00 225.00 227.00 224.57 225.48 225.81
3 oxl7�_ 7.0 221.00 220.00
M T16.63 94 8-4 108-19 47,063 51,200 -
�xt, d6iG3 29,934 54,116 4 5. F '8" 12" t5.0 221.FX? 220.00 223.00 224.25 226.00 223.95 224.69 225.01
N 16.77 94 9.2 106.30 46,241 51,200 16.77 3Q186 - -
szo xl6a•) 54,116 4 64.6 18" 12" 6.0 228.00 227.00 230.00 '331.25 233.00 230.97 231.70 232.01
�O _ - - _-
�15.83 J 92 ]3.5 37,162 - -
85.43 sees Sheet �3.95 25,110 39,149 4 46.7 18" 12" � 6.25 216.00 215.00 218.00
219.50 221.25 219.17 219.97 220.25
(1) Required Surface Area is based on 435 sf per cfs of Q10 peak inflow
(2) Required Volume is based on 1800 cf/ac. of disturbed area NOTE: SEE SHEET 1 FOR BAFFLE SPACING
(3) From invert of horizontal pipe to top of berm
OUTLET PROTECTION DETAILS
9 ft.
8 ft.
Note:
Inspect outlet protection structures weekly and after significant (112" or greater)
rainfall events 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.
Basin Maintenance
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 the basin
to its original dimensions when sediment accumulates to one-half the height of the first
baffle. Pull the skimmer to one side so that the sediment underneath it can be excavated.
Excavate the sediment from the entire basin, not just around the skimmer or the first cell.
Make sure vegetation growing in the bottom of the basin 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.
If the skimmer is clogged with trash and there is water in the basin, usually jerking 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 and remove the debris.
Also check the orifice inside the skimmer to see if it is clogged; if so remove the debris.
Tf the skimmer arm or barrel pipe is clogged, the orifice can be removed and the
obstruction cleared with a plumber's snake or by flushing with water. Be sure and replace
the orifice before repositioning the skimmer.
Check the fabric lined spillway for damage and make any required repairs with fabric that
spans the full width of the spillway. Check the embank ment, spillways, and outlet for
erosion damage, and inspect the embankment for piping and settlement. Make all
necessary repairs immediately. Remove all trash and other debris from the skimmer and -
pool areas.
SECONDARY SPILL
3
_ 20'
Laminated Plastic Lining or -
Impermeable Geotextile Fabric
3
1�
AY
1.75' to 2.0'
4" FAIRCLOTH SKIMMER
Skimmer shown in
floating position
2" Vent
with Orange tip
4" Sch 40 4" pvc float
Coupling
Connection 1
3" Sch 40 SOLID pvc barrel
or "arm" f
SUPPLIED BY USER 3
J.
4" inlet
extension
3" hose, ss clamps
3" threaded male nipple
on outlet end
Aluminum straps
suspending
tforizzc,ntai Intake
3.3"
Patent a: 5,820,751
4" HEAD (distance from
center of onfice/inlet to
I eater surface
4" Orifice!
(1) Coupling can be removed and hose attached to outlet using the threaded nipple.
Attach directly to metal riser ensuring a water tight connection.
Note: SCH 40 solid PVC barrel/arm should be between 6' and 10' in length.
Note: Design Flow Rates For 4" Skimmer: 0.23 cfs
Note: Flow rates are from Faircloth product cut sheets.
TOP OF SILT FENCE
MUST BE AT LEAST f
ABOVE THE TOP OF
THE WASHED STONE
i
M
3'-0"
SILT FENCE DETAILS
26"
steel Post
_ W uvea Wirc Fabric
4" Min.
.,Grade
8" Minimum Cover over Skirt
4" Minimum horizontal turn
T-o"
Silt Fence Specifications
1. Steel posts shall be a minimum of 5 ft. long, weigh a minimum of 1.3 lb/ft, and
have projections to aid in fastening the wire or fabric. Steel posts shall also
have a metal plate welded near the bottom such that when the post is driven
to the proper depth, the plate will be below the ground level for added stability.
2. Woven Wire Fence shall conform to the requirements of ASTM A 116,
Class I zinc coating for wire. The fence shall be at least 32 in. high and shall
Ituv�etd✓$¢4t(filline(il) w•i�. 9lrsryv(ruetrdrnill�wmsMsBtdn Bcspueed
12 m. apart. The top and bottom wires shall be 10 gage. All other Wires shall
be 12 Vi gage.
3 Filter Fabric shall be composed of fibers consisting of long chain synthetic
polymers composed of at least 85% by weight of polyolefins, polyesters, or
polyamides. The fibers shall be formed into a network such that the filaments
or yams retain dimensional stability relative to each other. The filter fabric shall
befree of any treatment or coating which might adversely alter its physical
properties after installation. The fabric shall be free of defects or flaws which
significantly affect its physical and/or filtering proper ties. The fabric shall have
a minimum width of 36 inches.
The filter fabric shall be furnished with suitable wrapping for protection against
moisture and extended ultraviolet prior to placement.
The filter fabric shall meet the following minimum physical requirements:
PROPERTY
TEST METHOD
REQUHtED VALUE
_ Tensile Sirengtb_ _
ASTM D_4632
400 Newtons (901b)
Elongation
ASTM D 4632
600/b- fabric self supporting ;
> 50% - fabric requires woven I
wore backing
Apparent Opening Size (AOS)**
ASTM D 4751
0.84 millimeter (U.S. Steve #20)
Perminvity
ASTM D 4491
0 Ol Sec' _
70%
Ultraviolet Stabrhty (retained
_
ASTM_14355
strength after Slights of
ultraviolet exposure)
4. A 6 in. x 6 in. trench shall be dug on the upstream side of the silt fence.
The silt fence shall line the trench and extend up the posts for the remainder
of the fabric width. The trench shall then be backfdled and tamped. Silt fence
fabrics shall be spliced together only at supporting posts with a minimum of
6 in. of overlap and in such a manner to prevent silt from passing between
the two ends. At the time of installation, the fabric will be rejected if it has any
defects, deterioration, or other damage incurred during manufacture,
transportation, or storage.
Silt Fence Maintenance Considerations
I . Inspect silt fences at least once a week and after each rainfall. Make any required repairs immediately.
2. Should the fabric of a sediment fence collapse, tear, decompose or become ineffective, replace it promptly.
3. Remove the 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 eleanout.
4. Remove all fencing materials and unstable sediment deposits and bring the area to grade and stabilize it
after the contributing drainage area has been properly stabilized.
SILT FENCE STONE OUTLET
WASHED STONE
FRONT VIEW
Note:
Remove vegetation and topsoil from
stone filter section.
SILT FENCE
t
BURY WIRE FENCE.
�-FILTER FABRIC.
ANDHARDWARE
CLOTH IN TRENCH
STEEL FENCE POST
►. SET MAX T APART ►-
MIN. 18' INTO SOLID
GROUND
WIRE FENCE
HARDWARE CLOTH
FILTER OF #57
WASHED STONE
BURY WIRE FENCE AND HARDWARE CLOTH
T FILTER FABRIC
ON GROUND
BURY T OF UPPER EDGE OF
FILTER FABRIC IN TRENCH
IF% j SECTION VIEW

a a
i,egmd
Intermittent Stream
----------
50' Undisturbed Buffers for Intermittent Screams
- -'
Ditch
Top oB ra hie Lines with Desi ted Elefi
p g1von
— — — — — — - Current Affected/Bonded Area
•�`
-------------- Proposed Addition To Affected/Bonded Area
— — — - Adjacent Property Lines
Property Lines & Permit Limits
�J Soil Berm
Reclamation Considerations
1. Maintain undisturbed buffer of at least 50ft from mine permit limits, wetlands
and natural bodies of water.
2. Perimeter mine excavation slopes shall 2:1 (Horizontal to Vertical) or flatter.
3.Perimeter berms, haul roads, and stock pile areas shall be removed and the
ground smoothed and sloped to promote gravity drainage. The 5'x5' concrete riser and
outlet pipe will remain at Basin K.
,
4. Revegetation per the Schedule below.
Vegetation Plan
1.Spread topsoil over disturbed areas and leave surface reasonably smooth and uniform.
2.Scarify surface to prepare a seedbed four to six inches deep. Use such equipment as
tilling, discing, tracing, or the teeth on a front end loader.
3.Miz lime and fertilizer with the soil during seedbed preparation.
4.Seed on freshly prepared seedbed following the application rates for the appropriate season.
5.Mulch all seeded areas immediately.
6.Tack mulch on slopes 3:1 (Horizontal: Vertical) or steeper by spraying with emulsified asphalt.ilo
Use an anchoring tool such as a farming disc set in a vertical position on slopes less than 3:1. -
Mulch netting may also be used on slopes.
7.Inspect seeded areas and make repairs within the planting season. If vegetation is over 60%
damaged, repeat eat steps 2 throu h 5.
P P g
8.Permanent revegetation shall be accomplished at the specified times of the year. Temporary
vegetation shall be applied outside of the optimal times for establishment of permanent vegetation
TEMPORARY SEEDING SCHEDULE
Seeding Date: August 15 to December 15
Seed Type Rate
Rye (grain) 1201bs./acre
10-10-10 Fertilizer 1,000lbs./acre
Lime 2,000 lbs./acre
Mulch 4,000 lbs./acre
Seeding Date: January 1 to May 1
Seed Type Rate
Rye (grain) 120lbs./acre
Lime 2,000 lbs./acre
10-10-10 Fertilizer 750lbs./acre
Mulch 4,000 lbs./acre
Seeding Date: May 1 to August 15
Seed Type Rate
German Millet 401bs./acre
10-10-10 Fertilizer 750lbs./acre
Lime 2,000 lbs./acre
Mulch 4,000 lbs./acre
PERMANENT SEEDING SCHEDULE
Seeding Date: Best Possible
Fall: August 25- September 15 August 20- October 25
Late Winter: February 15- March 21 February 1- April 15
I
Seed Type Rate
I
Tall Fescue 100 lbs./acre
Sericea Lespedeza 30 lbs./acre
Kobe Lespedeza 10 lbs./acre
10-10-10 Fertilizer 1,0001bs./acre
Lime 3,000lbs./acre
Mulch 4,000lbs./acre
i
Note 1: Fertilizer and lime application rates may deviate from above if soils are analyzed t
for optimum rates.
I'
Note 2: Mulch shall be tacked with emulsified asphalt at rate of 14 to 28 gallons/1,000 sq. ft.
on slopes of 3:1(H:V) or steeper.
Note 3: After August 15, use Unscarified Sericea seed for permanent seeding period.
- - Chatham Ridge LL:C
3301 Benson or Suite 601 -
Property Line and Raleigh; NCz7609 I� I
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P. O. Box 1551 - PEB3A Scale: F' = 300'
Raleigh, NC 27602 _
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