20220228_Mine_Maps

ado
Pipe Outlet to Flat Area —
No Well-defined Channel
Plan--��
La
Section
.,
blanket
Pipe Outlet to Well-defined
Channel
Notes
1. La is the length of the riprap
apron.
2. d =1.5 times the maximum
stone diameter but not less
than 6".
3. In a well-defined channel ex-
tend the apron up the channel
banks to an elevation of 6"
above the maximum tailwater
depth or to the top of the bank,
whichever is less.
4, A filter blanket or filter fabric
should be installed between
the riprap and soil foundation.
Filter
blanket
Figure 6.41c Hiprap outlet protection (modified from Vo SWCCI.
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coarse aggregate
Figure 6.06a Gravel enttenceleait keeps sediment from leaving the construction site (modified trom va swccl.
C7@0,VEL CONS, 11vt,*004 E_IV'&ANCE �6lAt�
Steel
post
Wire
fence
24"
z4°
fabric with wire fence
max. extra
Filter
fabric
c or
ties
Wire
fence
Cross -Section
View
Filter
Steel fabric Backfill trench
Natural
Post / and compact
ground
)horoughly
. •lq.n , . •
Upst�
•
min
Figure 6.62a Installation detail of a sediment fence.
Natural
ground
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Development and Operation Plan
i+i c'a4" /^ L o sN t c �� Gravel Construction Entrances will be established as shown on mine plan.
C, ,' ° 8izo�' Grading will begin in "initial Mining Area" adjacent to the "Plant and
I '�, �r `►' I Process Area". This initial excavation will serve as sediment and erosion
control for establishment of the plant and processing area. All runoff from
the plant and processing area will be directed into this excavation and
i aI 5 retained without discharge. After the processing plant is established,
water from this excavation will be utilized as recycled wash water and for
i 'rot dust suppression. Mining will then progress to the mining area south of
11, k ; a the plant and processing area. These two mining areas will serve as
to \ C
afA z 2 t , sediment and erosion control for the plant and processing area for the life
It z � I t a of the mine. Mining will then progress to the other designated mining
t l tat tp `, areas as the need arises. In each area, the initial excavation will serve as
i 10 z i �_ M (A! 0lv t ` tv the sediment and erosion control structure. Since the topography is
16 r `,3 l osie generally flat -lying aloe the perimeter of the minis areas, silt fence will
I 4 AtZ`Z A 9 Y Y 9 9 p g
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t 1 t Z t be utilized to prevent sediment from leaving the mining area during initial
t ` o =z I clearing. Stormwater will be retained within the mining area, and either
i-sEiJ t k z
l � t tk' z zw used in processing I dust suppression or discharged at the designated
i \ � r
t>n 30'« re' Teter 1101bAA6ia J ti point.
ICKWfalli
I Mien
k py�To ` ti` to�� / Sediment and Erosion Control
i t•14p�4iPt=� t ��' �\4
The mining areas will serve as the primary sediment and erosion control feature. After the
Gravel Construction Entrances are established, excavation will begin in the initial mining
k areas just north and south of the Plant and Stockpile Area. Diversion berms will
iiNi. k t /
t tk.Ai3t�9 t // established just outside the 50-foot undisturbed buffer of the wetlands, and around the
? I
r WicA l✓avy� perimeter of the mining area. This will prevent any sediment from leaving the disturbed
( t / / area and entering the wetland area. The Visual Barrier Berms (as required by the County)
will be established outside of the 50-foot undisturbed buffer along the property line,
21 ` thereby preventing any sediment from leaving the permitted area. The Haul Roads and
Plant and Stockpile Area will then be cleared and graded to drain into the Mining Area
tit
tit t t 1 E ' excavations. The perimeter berms adjacent to the Haul Roads and Plant and Stockpile
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r t Area will be "notched" at approximately 200-foot intervals to allow runoff to pass from
\ �r `I `S these areas into the mining area. The openings will be backfilled with rip -rap and #57
/
t t / stone to prevent erosion. Runoff will be held within the Mining Areas until pumped out.'
r a , \
t r All Haul Roads will be graded to direct runoff back into the mining areas. Once the initial
r , Mining Areas and Plant and stockpile Areas are established, all future land disturbance
t will be a continuation of this process, with all runoff remaining within the mining area.
r tt i When moving into a new mining area, an initial area of excavation will be established with
' t i t A a perimeter berm or silt fence to prevent any sediment from leaving the disturbed area
r
it { �QQ' mining area. As mining progresses, all runoff will remain within the mining area.
''S t A
r a ! No discharge of any water will be necessary in the early stages of this operation. Any
rr t 1 tt t �t 1 r t water collected within the Mining Area will be utilized for dust suppression or in the
I washing process. After the Mining Area has expanded to a large enough size, some
7 i 2 I a „ I occasional discharge may be necessary. At that time, a temporary 30'x6o' basin will
i It t g ! I hg (� E I s constructed within the mining area. Any water pumped from active mining areas will pass
I +, tt tk through this basin before discharge. After mining is completed in the area of the
I ►1 } 3 / 3 / c t discharge point, then the mining area will fill with water, and any discharge form other
/� I NSW t mining areas will pass through the large pond before discharge.
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Si MItJING o t! � �ti /
Reclamation Plan
ATZ;a0.
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t_b �� y` I Fri 0_0g0 La v S WO All mining areas on this site will be left as a lake. As the excavation
�o� z Z r ti 2 i l t t r Oer4rvl5 f-t,urtzks reaches the final mining limits, the slopes will be graded to a 3:1 slope. All
r
f tt wEIT g i I� disturbed areas that remain above water will be graded si a . slope e r
�r (� I 1 Ex15K ` t l x z r a flatter and seeded according to schedule to prevent erosion. Perimeter
berms will be removed and graded. The plant and processing area will also
tor �� �� f Q wE7r,wt,5 be graded and seeded to prevent erosion. Any haul roads will be stabilized
r ;l� �.\ t
-70ii _ f 1! i I February 2022 Modification to prevent erosion and left for access to the property.
This minor modification adds 2.4 acres of Mining Area within a previously permitted area. No
t r ru r iti g t ( t ` Ej Ae"'ss RoAy new acreage is being added to the permitted area. Wetlands in this area were delineated by
! t% _ f a t r t Wyatt Brown, Brown Environmental Group, and subsequently approved by the US Army Corps RECEIVED
i r( ,' tt l k r /sr of Engineers. As elsewhere on this site, a 50 foot undisturbed buffer will be maintained
r / �•, 1 f t / F� between wetlands and any land disturbance. Silt fence will be established around the perimeter FEB 2 8 ZOZZ
l/rvbig�
too' r ,/ -t ?j ` t ` TttPeJei
-�--� of the new mining area prior to any land disturbance. All runoff will be directed into the
�vrs�t. tt vn pi rsb-tng in f t �i� S excavation, and there will be no discharge of stormwater. Any water collected within the new LAND QUALITY
t 149 r% r + , mining area will be pumped as needed to the existing mining area via pipe. The new mining WING PROGRAM
tarea is accessed by an existing farm path via Stokes Road. Reclamation of the site will be in
LlrVr ,MiT BDu accordance to existing reclamation plan and permit requirements American Materials Company, LLC
f yrzy ----- _ , . j Dupree Pit, Permit #74-90
1 1 Affected acreage: Pitt County, NC
�3SZN5 LAC Mining area: 85.78 acres Permit Modification Request
Wastepiles (berms): 4 acres
Processing areas/roads: 4 acres 1 200 February 5, 2022
Total permitted acreage: 290 acres