20230313_Mine_Maps_66-12

■ ■
Aerial Plan View
LEGEND ■ ■ ■
Existing Property Line and Permit Limits
i. : 4 _ . . _ . . _ ■ Limits of Disturbance Vicinit Ma
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Scale: l =2000'
F - ` Indicates Surface Water Flow Direction
i - -
Hydrology
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lipmi
�,,,, Per the USDA Soil Survey of Northampton County (Figure 2, Attachment A), on-site soils
AF primarily consist of disturbed ground (Udorthents) with a minor amount of Wehadkee soil. Off-
"` site stormwater enters the property from the east and north. A ditch was dredged along portions
P P Y 9 9
of the east and north property lines during the past mining activities (See Figures 1 and 2).
Some stormwater passes through the mine from east to west through a series of culverts located
General Sand Ridge Mine Modification Discussion at the existing roads. The on-site runoff and upslope runoff eventually discharge at the west
Scale: 1 " =300' property line.
The Sand Ridge Mine is located on 229.95 acres of land owned by Sand Ridge Development
Association, Inc. that is located about 1/4 mile north of Garysburg, NC in Northampton County
Access to the site is from HWY 46.
The existing permit allows 31 .5 acres disturbed with mining conducted by dredge. The proposed EXISTING ADDITIONAL PROPOSED TOTAL PROPOSED Sheet Legend
modification will include 25.27 acres of disturbance (56.27 total acres of disturbance). The new CATEGORY AFFECTED ACREAGE AFFECTED ACREAGE AFFECTED ACREAGE C-00: General Property Information
Applicant: Alton Jr.
Williams, disturbance will be at least 50 ft from jurisdictional wetlands as delineated by Brown's
Mine Manage: Ennis Williams Environmental Group, Inc. and approved by the U. S. Army Corp of Engineers. Tailings/Sediment Ponds 4.0 1 .47 5.47 C-1 : General Facility Layout
Phone Number: 252-539-6539 C-2: Mine Plan and Erosion Control (Previously Permitted)
A trackhoe will primarily be used to excavate the material at a maximum depth of 20 ft. below Stockpiles 3.0 1 .0 4.0 C-3: Erosion Control Details (Previously Permitted)
ground surface. Excavation will be below the groundwater table but no dewatering will be
necessary for the excavation. Wastepiles 0.0 0.0 0.0 C-4: Mine Plan And Erosion Control Details For Mine Modification
C-5: Reclamation Plan
Land Owner: Sand Ridge Development Association, Inc
Erosion control will be provided using diversion berms and one (1 ) sediment basin. As mining ProcessingArea/Haul Roads 6.7 0.65 7.35
P. O. Box 758 progresses the basin will be enlarged and likely will no longer have stormwater discharges from ENGINEERING & ENVIRONMENTAL DATE:
the disturbed area. An existing haul road will be used to access the mine area. No stone Mine Excavation 17.8 22.15 39.95 2 C SCIENCE COMPANY 11/21/18
Rich Square, NC 27869 surfaced entrance/exit section is provided for the mine since the haul distance between the plant 3008 Anderson Drive DRAWN:
Acreage: 229.95 acres and Hwy 46 is more than 1/2 mile. R(919)781-7798 9 TIPS
g Other (Explain) 0 0 0
REVISED:
PIN: 4928-08-3805 Upon completion of mining a pond will be formed by the mining, and the land above the water 01/15/20 General Properyt 01/15/20
Total Disturbed Acreage 31 .5 56.77 56.77 ++�����►,,,
level will be sloped to 3:1 (H:V) or flatter and will be revegetated. The existing hall roads will ,,,.�o�'cN o�;�.,,, SCALE:
_place. Outside mine area, the haul roads are stable. The roads are either flush with the Information
remain in = See Drawings
SEAL
adjacent ground or are elevated above the existing ground. = 15472 Pro osed Sand Ridge Mine sneec�r�,.
= �z = p g
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� 8287 Route Hwy 46 C-00
Garysburg, NC

Katherine Harris David and Debra Dunlow
1208 Drexel Ln PO Box 117
\ I I aston, NC 27832
Greenville, NC 27
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Robinson F ms LLC Garysburg, N 27831
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MapLegend -------
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I Property Line o\ 0 Existing Building
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—-— —-— — Stream � T
C Proposed Diversion Berm ENGINEERING & ENVIRONMENTAL DATE:
Existing Tree Line 2 C SCIENCE COMPANY 11/21/18
— — — — Plant and Initial Mine Disturbance 10-Year Dist. Proposed Temp. Silt Fence ales Anderson Drive DRA\\N.
( ) p p� � Raleigh, NC 27609 TPS
Existing Roadway / [phone]
10 ft. Topo Lines Bodies of Water Formed by REVISED:
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Past Mining Activities Q1/15/20 General Facility 01/15/20
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Layout 1 =200r
25' Buffer from Adjacent Property Line SEAL
Or 50' Undisturbed Buffer from Wetlands and Streams Scale. 1 tt = 200' = 15472 /f� Sand Ridge Mine (66-12) sheet No.
Wetlands ,
,,,,, �K•sH;`�;?.,,,, 8287 Route Hwy 46 _ 1
Garysburg, NC

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Map Legend
Existing LAND DISTURBANCE SEQUENCE
Property Line 0 g Building ENGINEERING & ENVIRONMENTAL DATE:
————————- Adjacent Property Line � Proposed Diversion Berm 1. Obtain Mining Permit and NCG20000 Stormwater or NCG520000 Discharge permits.
2 C SCIENCE COMPANY 11/21/18
p 3008 Anderson Drive
—.—'—.— — DRAWN:
Stream
Raleigh, NC 27609 TPS
Existing Tree Line Proposed Temp. Silt Fence 2. Install diversion berms/temporary silt fence, and proposed Sediment Basin. [phone]
Prior to construction of the basins, install silt fence down-slope of basins and berms. REVISED:
— — — — Plant and Initial Mine Disturbance Remove silt fence after basins have been constructed and vegetation has been 01/15/20 Mine Plan and 01/15/20
Existing Roadway r Bodies of Water Formed by established on embankment. ,, " ��,,
}Se 10 ft. To o Lines Past Mining Activities '
0CARo Erosion Control
Ott., ..�...�(j SCALE:
p r r 3. Clear only as much land as necessary to install the erosion control devices. ``' Q�° 0` �` (Previously Permitted) 1 =60
2 ft. Topo Lines SEAL
ios Proposed To o Lines 4. Begin clearing and grading plant area and install plant. �� = 15472 J': Sand Rid e Mine 66-12 Sheet No.
p p Scale: 1 = 60 _ 9
Wetlands �'�q "� �"' �' �` 8287 Route Hwy46 C-2
_________ 5. Revegetate per the vegetation schedule. •,,�,� K� `�,,•�
25' Buffer from Adjacent Property Line
Or 50' Undisturbed Buffer from Wetlands and Streams
Garysburg, NC

CULVERT DETAILS & OUTLET PROTECTION (NTS) CULVERT DETAILS & OUTLET PROTECTION (NTS) VEGETATION PLAN
SILT FENCE DETAILS
1. Spread topsoil over disturbed areas and leave surface reasonably smooth
2 Roadway Cross-Section(NTS) 2 and uniform.
2 Roadway Cross-Section(NTS) 2 Minimum
s'M`XD" 2. Scarify surface to prepare a seedbed 4 to 6 inches deep. Use such equipment
10 Gauge Line Wires
Upstream 1 1 Downstream 1 1 (variable as Minimum l2-1/2 Gauge lntermediateWires
H ------- ----- - _______ Upstream - Downstream Silt Fence Geotextile Fabric as tilling,discing,or tracing with the teeth on a front end loader.
---------------------------------
H �------- ix lime an fertilizer with the soilduring seedbed preparation.
I 3'-0" 4. Seed on freshly prepared seedbed following the application rates for the
Do
-------------DO---- --------------------
ilt enc Fa tic 26" appropriate season.
Invert Slope (So) ------------------------------------ -------- o e e
Wi er to Grade 5 Mulch all seeded areas immediately.
Invert Slope (So) o`;t000e:o;;apoe��°
T
-,IT- _ Grace 6. Tack mulch on slopes 3:1 (H:V)or steeper by spraying with emulsified
- -Filter Fabric - -
asphalt. Use an anchoring tool such as a farming disc set in a vertical
_ J
6"Minimum Cover over Skirt positing on slopes less than 3:1. Mulch netting may also be used on slopes.
s Note:The existing culverts shall maintained free flowing. L L r ¶ T-0" 7. Inspect seeded areas and make repairs within the planting season. If
IF
Any sediment accumulation shall be removed from the pipe. Note:The existing culverts shall be maintained free flowing. Note: I_ r _
Any sediment accumulation shall be removed from the pipe. Outlet protection will be minimal for the culverts.However,water will be inflowing = - _ vegetation is over 60%damaged,repeat steps 2 through 5.
from the diversion berms at the same locations as the culvert outlets.See Sheet C-2 __-_' - - 8. Permanent revegetation shall be accomplished at the specified times of
EXISTING CULVERT INFORMATION for plan dimensions of stone. - the year. Temporary vegetation shall be applied outside of the optimal times
for establishment of permanent vegetation.
Culvert Culvert Information
No. H,ft. L,ft Do,in. Material Proposed Culverts And Stone Outlet Schedule
1 2.5 32 18 Corrugated Metal t WaterShed Area TEMPORARY SEEDING SCHEDULE
Culver Acres C Flow Rate cfs Outlet Protection Silt Fence Specifications
2 5.0 2s 18 Corrugated HDPE (average) to(min) 010 025 Hw,ft H.ft L,ft So,ft/ft DO,ft Stone T The filter fabric shall meet the following minimum physical requirements: Seeding Date: Dec. 1 - Apr. 15
No. Total Disturbed Type T,in. 1.Steel posts shall be a minimum of 5 ft.long,weigh a minimum of 1.31b/ft,and g p Y q g p
3 11.0 48 60 corrugated Metal have projections to aid in fastening the wire or fabric. Steel posts shall also PROPERTY* TEST METHOD REQUIRED VALUE Seed Type Rate
0.51 0.51 0.5 5 1,g 2.1 0.78 2.0 40 0.01 1.0 Class B 22 P J g p Q y (grain) 120 lbs/acre
4 7.5 32 42 concrete 1 have a metal plate welded near the bottom such that when the post is driven Tensile Strength ASTM D 4632 400 Newtons(901b) Rye
2 1.55 1.55 0.5 5 5.6 6.q 1.3 2.5 44 0.02 2•0 Class B 22 Kobe lespedeza 50 lbs/acre
5 8.5 so a2 Concrete to the proper depth,the plate will be below the ground level for added stability. Elongation ASTM D 4632 <50%-fabric self supporting
6 8.5 40 72 Smooth Metal (1) Reinforced Concrete Culvert Shall be Class 11 or better per NCDOT requirments. -50% fabric requires woven 10-10-10 Fertilizer 750 lbs/acre
2 Rain fall intensity is 7.26 in/hr for 10 ear rain and 8.20 for 25 ear rain. 2.Woven Wire Fence shall conform to the requirements of ASTM A 116, -> Lime 2,000 lbs/acre
7 s.o ao 42 Concrete ( ) ens y y Y Class I zinc coating for wire. The fence shall be at least 32 in.high and shall wire backing Mulch 4,000 lbs/acre
Apparent Opening Size(AOS)** ASTM D 4751 0.84 millimeter(U.S.Sieve#20)
have at least 6 line(horizontal)wires. Stay(vertical)wires shall be spaced Seeding Date: Apr. 15 - Aug. 15
Permitivity ASTM D 4491 0.01 Sec:'
12 in.apart. The top and bottom wires shall be 10 gage. All other wires shall Seed Type Rate
be 12 1/2 gage. Ultraviolet Stability(retained ASTM D 4355 70% German Millet 40 lbs/acre
SKIMMER DETAIL SKIMMER BASIN DETAIL Strength after 500hrs of 10-10-10 Fertilizer 750lbs/acre
3.Filter Fabric shall be composed of fibers consisting of long chain synthetic ultraviolet exposure) Lime 2,000 lbs/acre
polymers composed of at least 85%by weight of polyolefins,polyesters,or Mulch 4,000 lbs/acre
Arm Assembly Baffles 1"Freeboard Embankment pY Embk of amides. The fibers shall be formed into a network such that the filaments
\
\,I / or yarns retain dimensional stability relative to each other. The filter fabric shall Seeding Date: Aug.15 to Dec. 1
.c Enclosure / \ I` be free of any treatment or coating which night adversely alter its physical Silt Fence Maintenance Considerations
Seed Type Rate
properties after installation. The fabric shall be free of defects or flaws which Rye(grain) 1201bs/acre
� 3'Fill 1. Inspect silt fences at least once a week and after each rainfall. Make an required repairs immediate) Y (� )
Water Entry Dewatering significantly affect its physical and/or filtering properties. The fabric shall have p Y q p Y'
PERSPECTIVE VIEW unit zone 6"min.invert elevation of gT11 Y P Y g P P 10-10-10 Fertilizer 1,000 lbs/acre
errrergenry spillway a minimum width of 36 inches. 2. Should the fabric of a sediment fence collapse,tear,decompose or become ineffective,replace it promptly. Lime 2,000 lbs/acre
PVC End PVC Vent Emergency 2'Cut
PVC Elbow pie Schedule 40 Filter fabric spillway 3. Remove the sediment deposits as necessary to provide adequate storage volume for the next rain and to Mulch 4,000 lbs/acre
Cap P PVC Pipe 4.The filter fabric shall be furnished with suitable wrapping for protection against reduce pressure on the fence. Take care to avoid undermining the fence during cleanout.
Water Surface Sediment Cross-Section moisture and extended ultraviolet prior to placement. 4. Remove all fencing materials and unstable sediment deposits and bringthe area to grade and stabilize it
PVC End storage zone View after the contributing drainage area has been properly stabilized.
Cap 5. A 6 in.x 6 in.trench Shall be dug on the upstream side of the silt fence. PERMANENT SEEDING SCHEDULE
Schedule 40Proposed Skimmer Basin Calculations The silt fence shall line the trench and extend up the posts for the remainder
PVC re PVC Pipe PVC Pipe p Seeding Date: Apr. 1 -Jul 15
°Holes in PVC Tee Orifice of the fabric width. The trench shall then be backfilled and tamped. Silt fence g p y
Underside Flexible Plate WaterShed Area,Acres Baffle Spacing,ft
Hose Surface Area,square ft. Basin Plan Storage Volume,Cubic Ft. Skimmer fabrics shall be spliced together only at supporting posts with a minimum of Seed Type Rate lb/ac
010,cfs Q25,cfs Dimensions Dam Orfice Dia. Draw Down P g Y pp g P ( )
o Basin Total Disturbed C Tc(min) Required Provided m n io Required Provided a b c d Height,ft Size,in. Draw
Days 6 in.of overlap and in such a manner to prevent silt from passing between Pensacola Bahiagrass 50
Bottom Surface 1 1.13 1.13 0.5 5 4.1 4.6 1,332.5 1,352 26 X52 2,034 3,210 18.2 13.0 13.0 7.8 5 1.5 1.8 the two ends. At the time of installation,the fabric will be rejected if it has any Sericea lespedeza 30
END VIEW FRONT VIEW 2 1.13 1.13 0.5 5 11.5 13.0 3,737.5 3,872 44 X 88 5,688 11,580 30.8 22.0 22.0 13.2 5 2.5 1.8 defects,deterioration,or other damage incurred during manufacture, Centipede grass 5
transportation,or storage. German millet 10
(1) Required Surface Area is based on 325 sf per cfs of Q10 peak inflow
(2) Required Volume is based on 1800 cf/ac. of disturbed area
(3) Rain fall intensity is 7.26 in/hr for 10-year rain and 8.20 for 25-year rain. Soil Ammendments:
Apply lime and fertilizer according to soil test,or apply
PERSEPECTIVE VIEW 10-100 lb/acre 0 10 fertilizernd agricultural limestone and 5001b/acre
SECONDARY SPILLWAY DETAIL
Basin Cross-Section(NTS) 5 ft.
Mulch:
Apply 4,000 lb/acre grain straw or equivalent cover of another
3 3 suitable mulch.Anchor by tacking with asphalt,roving,or netting
EL 109' or by crimping with a mulch anchoring tool.A disk with blades
1 1 1 .5 set nearly strarght can be used as a mulch anchoring tool.
ea � 1 5 � 1.10' 1.75' Pool Level During Plant and Dredge Operations(EL 107.90')
06.aver I.anllnated Plastic Lining or TRASH RACK Maintenance:
°`s 0. Impermeable Geotextile Fabric EL 107.2 ' Refert1 ize the following April with SO lb/acre nitrogen.Repeat as
Z171 7.75 Embankment Composed of Nature Ground and Fill growth requires.May be mowed only once a year.Where a neat
°Of
shaabel sa a Note: Place secondary spillway crest 1,5'below top of embankment. appearance is desired,omit sericea and mow as often as needed.
a
2sSo°O °aa�sa 36"Dia Rise Pipe(CMP)
of�aC b
s` ha0 S°
.0 ° aCa�,
1�� e CROSS-SECTION BAFFLE (NTS) Stone Outlet EL 103' 190'long-30"Dia CMP,Slope=0.0053 ft/ft 3 EL 104'Anti Float
o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1) Ground Stabilization*
ar o-o-o-o-o-o-o-o-o-o-o-o-o 0 0 0 0
a d 22�oo°o°o°o EL 102'
°°OOOOO°O°O°O°O°O°O°O°OOOOOOO°O°O Note:Q=15.6 CFS During Plant and Dredge Operations
Support Post,24'into Stake to support wire Site Area Stabilization Stabilization Time
bottom or side Filter Fabric
Description Time Frame Frame Exceptions
�
• Perimeter dikes,
swales,ditches 7 da)s Ntnic
Support rope to wire - and slo es
to prevent sagging 190'
Outlet Protection • High Quality
Plan View Coirmeshor similar,stapled or Water(HQW) 7days Nonr
trenched into bottom or side Zones
e4Pe e(apa If slopes are 10' or
°me800"`� BASIN CONSTRUCTION NOTES
'������` A����°``°`�� • Slopes steeper less in length P P gt are
wee voe4 �w°e: �e e
1.Site preparations-Clear,grub,and strip topsoil from areas under the embankment to remove Place the fill material around the pipe spillway in 4 inch layers,and compact it under and around
„. 7days
than 3.l not steeper than 2:°,,o�,e.ee.o.°°w.�,e.eo:.°°w.°,e.e.o e:°•w•°e°o�o
p tl,
trees,vegetation,roots,and other objectionable material.Delay clearing the pool area until the the pipe to at least the same density as the adjacent embankment.Care must be taken not to raise
14 days are allowed.
Porous Baffle I e Specifications e i f i e at i o n s dam is complete and then remove brush,trees,and other objectionable materials to facilitate the pipe from firm contact with its foundation when compacting under the pipe haunches.
�e
p OUTLET PROTECTION PLAN VIEW
sediment cleanout.Stockpile all topsoil or soil containing organic matter for use on the outer shell
7-days for slop
es
Place a minimum depth of 2ft.of compacted backfill over the pipe spillway before crossing it Y P
P P PP P Y •g
,I
Sl
opes eS 3: U f hembankmentf iliestablishment.Place temporary sediment control I r o the to facilitate vegetative ace to o sedl e t co tro
P
1. Grade the basin so that the bottom is at equal elevation.
gP a1Y
q1'4 days gr
eater }with construction equipment.meat.Anchor the riser in lace with concrete or other satisfactory means to than 5
q p p ry y b an 0 feet
•`ffd�p��e��:,r,1 0o measures below the basin as needed. flatter prevent flotation.In no case should the pipe conduit be installed b cutting a trench through the r
�°°•�° ��dff � 2. Steel posts shall be driven to at least 24 inches below ground surface and spaced at 4 ft.centers. o°g°g°° ° P P P Y g g Ilt length
6, 2.Cut-off trench-Excavate a cutoff trench along the center line of the earth fill embankment. dam after the embankment is complete.
3. Top of fabric shall be at least 6 inches above stone spillway elevation and 2 inches lower than o0000000000000°° ° Cut the trench to stable soil material,but in no case make it less than 2 ft.deep.The cut-off trench • All other areas None
Note:Use 12"thick Class A Erosion Control Stone o°o°o° must extend into both abutments to at least the elevation of the riser crest.Make the minimum (except for
berm elevation. ° ° ° ° ° ° 0,00000.00.0. 5.Inlets-Discharge water into the basin in a manner to prevent erosion.Use diversions with with slopes flatter 14 days
° ° ° ° ° ° ° ° ° bottom width wide enough to permit operation of excavation and compaction equipment,but in outlet protection to divert sediment laden water to the upper end of the pool area to improve basin perimeters and
o°o°o°° °°°°° ° o°o°0 7.5 ft. P PP P P
4. Bottom and sides of fabric shall be anchored in a 6 inch trench of pinned with 8 inch long erosion o°o°°° �°o°o°o°°°o no case less than 2 ft.Make side slopes of the trench no steeper than 1:1.Compaction than 4;1
4 °°° ° ° o o ° P P P trap efficiency. HQW ZUneS
control matting staples. 16 ft. o so"cnnP
requirements are the same as those for the embankment.Keep the trench dry during backfilling * „
0 0 0 0 0 0 0 0 0 0 0 0 o Extensions of time may be approved b the permitting authority
°o°o°o°o°o°o°o°o°o°o°o°o° and compaction operations. 6.Erosion control-Construct the structure so that the disturbed area is minimized.Divert surface P Y p b
5. The baffles shall be composed of coir fiber matting with the following specifications. ° ° ° ° ° ° ° ° ° ° ° ° Y P based on weather or other site-specific conditions that maize compliance
0000000000000000000°0° water away from bare areas.Complete the embankment before the area is cleared.Stabilize the
Skimmer Basin Construction Specifications o00000000000000°° 3.Embankment-Fill material should be clean mineral soil,free of roots,woody vegetation,rocks, emergency spillway embankment and all other disturbed areas above the crest of the principal impracticable."(Section I LB(2)(b))
o°o°o°o°o°°°° and other objectionable material.Scarify areas on which fill is to be placed before placing fill. spillway immediately after construction.
coir Fiber Mat Specifications °o °o
1.Clear,grub,and strip the area under the embankment of all vegetation and root mat. 100%cocount fiber(coir)twine woven into high strength matrix 0000°° The fill material must contain sufficient moisture so it can be formed by hand into a ball without
Remove all surface soil containing high amounts of organic matter and stockpile or Thickness:0.30 in.minimum crumbling.If water can be squeezed out of the ball,it is to wet for proper compaction.Place fill
dispose of it properly.Haul all objectionable material to the designated disposal area. Tensile Strength: 1348x 6261f/ft minimum 12 ft. - material in 6 to 8"continuous layers over the entire length of the fill area and compact it. MAINTENANCE CONSIDERATIONS
Place temporary sediment control measures below basin as needed. Elongation:34%x 38%maximum Compaction may be obtained by routing the construction hauling equipment over the fill so that Inspect the sediment basins at least weekly and after each significant(1/2 inch or greater
Flexibility(mg-cm):65030 x 29590 the entire surface of each layer is traversed by at least one wheel or tread track of heavy greater)rainfall event and repair immediately.Remove sediment and restore the basin to its
Flow velocity:Observed 11 f/sec Note: equipment,or a compactor may be used.Construct the embankment to an elevation 10%higher EARTHEN BERM DETAILS
2.Ensure that fill material for the embankment is free of roots,woody vegetation,organic Weight:20 oz/SY Inspect outlet protection structures weekly and after significant(1/2"or greater) original dimensions when it accumulates to one-half the design depth.Place removed sediment
than the design height to allow for settling. Cross-Section (NTS)
matter,and other objectionable material.Place the fill in lifts not to exceed 9 inches,and Size:6.6 x 164 ft(120 SY) rainfall events to see if any erosion around or below the riprap has taken place, in an area with sediment controls.
machine compact it.Over fill the embankment 6 inches to allow for settlement. "C"Factor:0.002 or if stones have been dislodged.Immediately make all needed repairs to illwa s
4.Conduit spillways-Securely attach the riser to the barrel to make a watertight structural Check embankment,s
Open Area(measured):50% prevent further damage. p• y ,and outlet for erosion damage,and inspect the embankment for
connection.Secure all connections between barrel sections by approved watertight assemblies. piping and settlement.Make all necessary repairs immediately.Remove all trash and other
3.Shape the basin to the specified dimensions.Prevent the skimming device from settling Note:Porous baffles are to be tied back into basin embankments Place the barrel and riser on a firm,smooth foundation of impervious soil.Do no use pervious 3' -�
P P debris from the riser and pool area.
into the mud by excavating a shallow pit under the skimmer or providing a low support at bottom and sides of the weir. material such as sand,gravel,or crushed stone as backfill around the pipe or anti-seep collars.
under the skimmer of stone or timber. 3
1
4.Place the barrel(4-inch Sched.40 PVC pipe)on a firm,smooth foundation of
BERM 2'
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 Skimmer Basin Maintenance
embankment.Care must be taken not to raise the pipe from the firm contact with its Inspect skimmer sediment basins at least weekly and after each significant(one half inch foundation when compacting under the pipe haunches.
or greater)rainfall event and repair immediately. Remove sediment and restore the basin FOREBAY CROSS-SECTION NTS
(NTS) PRIMARY SPILLWAY DETAILS BERM CONSTRUCTION SPECIFICATIONS
5.Assemble the skimmer following the manufacturer's instructions. to its original dimensions when sediment accumulates to one-half the height of the first Cross-Section (NTS) 1. Construct berm by placement of topsoil and overburden taken
ki P baf
fle.Pull the skimmer to one side so that the sediment underneath it can be excavated. EL 109' from initial) disturbed areas.
6.Lay the assembled skimmer on the bottom of the basin with the flexible joint at the Y
Excavate the sediment from the entire basin,not just around the skimmer or the first cell. 5 ft. 2. Prior t0 placement of materials for berm formation Cut
inlet of the barrel pipe.Attach the flexible joint to the barrel pipe and position the p ,
skimmer over the excavated pit or support.Be sure to attach a rope to the skimmer and Make sure vegetation growing in the bottom of the basin does not hold down the Top of Berm (EL. 109.00) vegetation nearly flush with ground.
anchor it to the side of the basin.This will be used to pull the skimmer to the side for 3 ° 0000° EL 107' 3. Compact materials in 1 ft. lifts b construction traffic.
P skimmer. ° o 0 0 Water Level During p Y
EL 106' 3 1.1 Plant and Dredge Operation
maintenance. g 5' 1 °°°00000°°°°
Repair the baffles if they are damaged.Re-anchor the baffles if water is flowing ° °°o°o°o°o°o°o ° °°o°o°o°°
7.Earthen Spillways-Install the spillway in undisturbed soil to the greatest extent 3 0°0°0°0°0°0°0°0°0°0°0 1 0°o°o°o° (E L. 107.9)
underneath or around them. 1 ° o ° ° ° ° ° o ° o ° ° ° o ° ° 30 Dia. CMP ENGINEERING & ENVIRONMENTAL DATE:
possible.The spillway should be lined with laminated plastic or impermeable geotextile ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° °
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 � c
° ° ° ° ° ° ° ° ° ° ° ° ° ° ° 0000 ° 11/21/18
° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° 0000
° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° SCIENCE COMPANY
fabric.The fabric must be wide and ion enough to cover the bottom and sides and ° o ° ° ° ° o o ° o ° o ° o
g g 0000 f3 � �o b 0000
If the skimmer is clogged with trash and there is water in the basin,usually jerking on the o 00000000000o twb�
extend onto the top of the dam for anchoring in a trench.The edges may be secured with EL 102' o°o°o ° ° ° ° ° ° ° ° ° ° ° ° ° „
3008 Anderson Drive
rope will make the skimmer bob up and down and dislodge the debris and restore flow.If o°o°°°o° 36 Dia CMP DRAWN:
8-inch staples or pins.The fabric must be long enough to extend down the slope and exit °°°°°°°° Raleigh, NC 27609
onto stable ground.The width of the fabric must be one piece,not joined or spliced; this does not work,pull the skimmer over to the side of the basin and remove the debris. 0000 ° Filter Fabric g TPS
otherwise water can get under the fabric.If the length of the fabric is insufficient for the Also check the orifice inside the skimmer to see if it is clogge d;if so remove the debris. [phone]
entire length of the spillway,multiple sections,spanning the complete width,may be REVISED:
used.The upper section(s)should overlap the lower section(s)so that water cannot flow If the skimmer arm or barrel pipe is clogged,the orifice can be removed and the 01/15/20
under the fabric.Secure the upper edge and sides of the fabric in a trench with staples or obstruction cleared with a plumber's snake or by flushing with water.Be sure and replace Embankment Erosion Control Details
1/15/2 0
pins. the orifice before re ositionin the skimmer. 1 ```��t�µnCrrrf►p������
P g E L 10 2' `OQ`�� ""�`�1��'q�' SCALE:
8.Inlets-Discharge water into the basin in a manner to prevent erosion.Ensure that the Check the fabric lined spillway for damage and make any re quired repairs with fabric that �`��rQ��F a +: '% (Previously Permitted) None
diversion berms will have positive drainage to the upper end of the basin. ° f SEAL f
spans the full width of the spillway.Check the embank meat,spillways,and outlet for
erosion damage,and inspect the embankment for piping and settlement.Make all = / Sheet No.
9.Erosion Control-Construct the structure so that the disturbed area is minimized.Divert 15472 Proposed Sand Ridge Mine necessary repairs immediately.Remove all trash and other debris from the skimmer and .,
surface water away from bare areas.Complete the embankment before the area is cleared. r`=
Stabilize the emergency spillway embankment and all other disturbed ar eas above the pool areas. NOTE: 0.8 CUBIC YARDS O F CONCRETE REQUIRED '%°9 ''FNci �''C,�.°� 8287 Route Hwy 46 C-3
SH11�� s,.�
Garysburg, NC

SEDIMENT BASIN W/ SKIMMER DETAIL (PROPOSED BASIN)
TOP OF EMBANKMENT
Pipe Connections
RISER STRUCTURE
Ensure that all conduit connections are watertight. Rod and
1'MIH- ��.•[.::",,�„tf .r. g
TRASH RACK - � �� EMERGENCY SPILLWAY lug type connector bands with gaskets are referred for corrugated
rrrrr
I g YP g P g rrrrr 1 FREEBQARQ ! -HIf-III+-{III-l+l+�
l l 111 l l l 111 l l l 111 l l l 11 I ,. \ rrrrr r MIN- �2 llEU1fE111 U1=I�=11I�- z metal pipe to assure watertightness under maximum loading and internal
\ r rrrrrr / erg - s PP g g
l l l l l l l l l l l l l l l l l l l l l l l ---- I r r rrrrrr SKIMMER 0 ��t+►r�r+l+ l+r+=l+tr ull�r+NCI+l+ uu t+lf isz\ rrrr rrrrr �o I111�111I�lilIEI�;20 RI MIIt2 IN sW IRE 1�� opB pressure. Do not use dimple(universal)connectors under any
l+A�i+IIW2E ult�ltil 111+ � circumstances.
rrrrrr rrrrrr
l u l l �, .� . r r r r r r r r r r r r r Ali �Hll�li�l�11R�1111�11R�g1i�111i�1111 �1111�1��1111�1i
I \ t 'r •- BARREL Trash guard
LAND DISTURBANCE SEQUENCE`
�g \ / _ ' PIPE -It is important that a suitable trash guard be installed to prevent the riser
and barrel pipes from becoming clogged. Install a trash guard on the
rrrrr
\ top of the riser to prevent trash and other debris from clogging the conduit.
rr�
b .�
� .
I y � ,� CLASS B STONE PAD
1.Obtain Mining Permit and NCG20000 Stormwater Discharge permit. ` I � �� ��`�� �� �' CUT-OFF ANTI-SEEP A combination anti-vortex device and trash guard improves the efficiency
(a x a x r MIN.) ANTIFLOTATION BLOCK 5 E CTI a N AL VIEW t STABILIZED of theprincipal s illwa and protects against trash intake.
TRENCH COLLAR spillway p g
2.Install diversion berms/temporary silt fence, and proposed Sediment Basin. l 111 l l l 111 l l l I \\ MIN. VOLUME 0.40 CY 2'DEEP OUTLET
Prior to construction of the basins,install silt fence down-slope of basins and berms. l 11111 l l 111111111110 l 11 l 11 ► \-__ _ / g piping
� 1.1 Protection against
Remove silt fence after basins have been constructed and vegetation has been l 111 l l l 111 l l l 111 l l l 111 l l l 111 l ------__/ / Install at least one watertight antiseep collar with a minimum projection
established on embankment. 11 1 1 1 111 1 1 1 111 l l l l l l l l l l l l l l I of 1.5 feet around the barrel of principal spillway conduits,8 inches or
l l 111 l l l 111 l 111 l l l 111 l l / ► NOTES larger in diameter. Locate the anti-seep collar slightly downstream from
3.Clear only as much land as necessary to install the erosion control devices. ` I 1.SEED AND PLACE MATTING FOR EROSION CONTROL ON INTERIOR AND EXTERIOR SIDESLOPES. the dam center line. A properly designed drainage diaphragm installed
l l l 111 l l l 111 l l l 111 l 1 2.INSTALL A MINIMUM OF 3 COIR FIBER BAFFLES IN ACCORDANCE WITH PRACTICE STANDARD 6.65. around the barrel may be used instead of an anti-seep collar when it is
4.Begin mining upslope areas and ensure disturbed areas drain to basin. l l 111 l l l 111 l l l 11 / t \ 3.INSTALL SKIMMER AND COUPLING TO RISER STRUCTURE OR DIRECTLY INTO EMBANKMENT 1 FT.FROM BOTTOM OF BASIN. appropriate.
l l l l l l l l l l l 4.THE ARM PIPE SHALL HAVE A MINIMUM LENGTH OF 6 FT.BETWEEN THE SKIMMER AND COUPLING. NOT TO SCALE
5.Revegetate per the vegetation schedule.
Proposed Basin Calculations
/ \
\ Design Elevations(ft. EL)
/ \ Surface Area at normal pool, Barrel Riser Inlet Outlet Crest of
/ \ Watershed Weighted Inflow s uare ft. Storage Volume,Cubic Ft.Skimmer Draw Down Invert of Invert of Top of Top of 10-yr 24-hr 25-yr 24-hr
Pipe Dia, Pipe Dia.,
/ Basin Area Average Tc, (t) (2) Area (z) Orifice, Time,hours Horizontal Horizontal Riser Secondary Berm Storm Elev. Storm Elev.
(acres) CN minutes Qt0,cfs Required Provided inches inches Dist.,acre Required Provided inches Pipe(') Pipe(3) Spillway
/ ea1d
I � � 1 25.27 86 21.6 95.63 41,600 64,000 18 24 25.27 45,486 61,750 4 73.7 92.00 91.50 95.00 96.00
97.50 96.01 96.50
(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
/ rr
Note:Baffle spacing is shown on Sheet 2.
/ VEGETATION PLAN
1. Spread topsoil over disturbed areas and leave surface reasonablysmooth
OUTLET PROTECTION DETAILS (PROPOSED BASIN) anduniform.
�� 2. Scarify surface to prepare a seedbed 4 to 6 inches deep. Use such equipment
"v ��
1 / I F„ \ e as tilling,discing,or tracing with the teeth on a front end loader.
NINE 3. Mix lime and fertilizer with the soil during seedbed preparation.
0
4. Seed on freshly prepared seedbed following the application rates for the
O d D Oo�� appropriate season.
4.5
o 5. Mulch all seeded areas immediately.
. o- 0.0 0.0 0.0
O qd-,6 Oo QO�o p 6. Tack mulch on slopes 3:1 (H:V)or steeper by spraying with emulsified
11.5' asphalt. Use an anchoring tool such as a farming disc set in a vertical
/ / I I CMP OUTLET oO_CU_V9 "O Sl*�0 positing on slopes less than 3:1. Mulch netting may also be used on slopes.
U "�?� 7. Inspect seeded areas and make repairs within the planting season. If
\ I O O o O o O C O 0 vegetation is over 60%damaged,repeat steps 2 through 5.
\ / \���• ohog-,��O ��Og-,o�p g g P P g
3Ja_caa O3Ja o Note: 8. Permanent revegetation shall be accomplished at the specified times of
o-O.(D' b Inspect outlet protection structures weekly and after significant(1/2"or greater) the year. Temporary vegetation shall be applied outside of the optimal times
or if stll events to see ones have beenfdislodged.Immediatelyerosion around or below make all needed repai has rs
place, for establishment of permanent vegetation.
prevent further damage.
/ r
/ 10, TEMPORARY SEEDING SCHEDULE
in D Dec. Apr. l
O /
Seed ate: ec. 5
g/ p
Seed Type Rate
/ • / / \, _ � �_ _ g\ Rye(grain) 120 lbs/acre
:: m _,_„��__;��,`��.ti� �� �������.g;.�:``� Kobe lespedeza. SOlbs/acre
VAeSECONDARY SPILLWAY (PROPOSED BAST 10Fertilizer
M� ,� ( )
/ � �",`,,, 10 10 7501bs/acre
/ � � .;�...����:�� Lime 2,0001bs/acre
Mulch 4,
�\ / // Seeding Date: Apr. 15 -Aug.� s/acre115
Seed Type Rate
5, 1 1 .5 3 German Millet 401bs/acre
1
2 10-10-10 Fertilizer 7501bs/acre
Lime 2,000 lbs/acre
•
Mulch 4,000 lbs/acre
Laminated Plastic Lining or
�0 1 p Imermeable Geotextile Fabric
\` � .....:.,..:.;.:.......,:;::.::....,., Seed' Aug. t 1 Seeding Date: Au .1 o Dec. 1
Seed Type Rate
Rye(grain) 1201bs/acre
\'\ �N, • 10-10-10 Fertilizer 1,000lbs/acre
\ \. �� �`• SILT FENCE STONE OUTLET Lime 4,000,000lbs/acre
Mulch lbs/acre
•\•\ �� \� MIN. SILT FENCE WIRE FENCE PERMANENT SEEDING SCHEDULE 7
\ HARDWARE CLOTH Seeding Date. Apr. I -July 15
WASHED STONE og� Seed Type. Rate(lb/ac)
o g � g
0 00 0�00 0o Pensacola Bahia rass 50
i ` \ e,, 000a'' O °OOO�° p000 0��j 3'FILTER FABRIC
\ °o o°�° goy$ ��`%, =o G ON GROUND p 30
\ \ FENCE �04 8448 bob ° w �e$gb8$ woow8�°o�g� Centipede grass 5
ABO ETOP FTHETT EAST _', o OpOQ`(Q,,�MUST BE AT LEAST I' 0 °oo YJ° O �o�°ObOo�s',gp�o o bDo�DOo O Og0•p0.a0o'00�p,Q}(,O
r r THE WASHED STONEo�D°0�80�8 °g °°O�°O K�o00MTS German millet 10
\\ `\ �aoQb°o�°6¢ off° �o�o`b° o�oM14?�ao%0o
BURYWIRE FENCEAND HARDWARE CLOTH BURY 5'OF UPPER EDGE OF
Soil Ammendments:
FILTER FABRIC IN TRENCH
FRONT VIEW Apply lime and fertilizer according to soil test or apply
BURY WIRE FENCE,
- r_ 1 Note: FILTER FABRIC, 3,0001b/acre ground agricultural limestone and 500 lb/acre
��-[[ AND HARDWARE
r Lk.� \\ SECTION VIEW 10-10-10 fertilizer.
r r r r4 r r 6 r Remove vegetation and topsoil from STEEL FENCE POST I
CLOTH IN TRENCH
•\ \\` r � r ' r r \ stone filter S2CIlOn. SET MA.'INTOS U I�
r r GROUND
'INTO SOLID Mulch:
\ r GROUND
\ Apply 4,000 lb/acre grain straw or equivalent cover of another
\\ suitable mulch.Anchor by tacking with asphalt,roving,or netting
or by crimping with a mulch anchoring tool.A disk with blades
\•\ \\ r r ��' r r r ' "1 set nearly straight can be used as a mulch anchoring tool.
Maintenance:
\ r r r Refertilize the following April with 50 lb/acre nitrogen.Repeat as
growth requires.May be mowed only once a year.Where a neat
rY OF "" OU�LE�P < Y appearance is desired,omit sericea and mow as often as needed.
\ \\� ��� 25,wIDE sES wAY EARTHEN BERM DETAILS
0 TEMPORARY
Cross-Section (NITS)
SILT FENCE
\ e STONE OUTLET NOTE:MINIMUM ELEVATION FOR TOP OF BERM SHALL BE 97.50'. 1) Ground Stabilization*
•\ \ ���;`
\ \ Ilk Site Area Stabilization Stabilization Time
\ TEMPORARY ` k Description Time Frame France Exceptions
\ Perimeter dikes,
S1"0.flE OUTLET SILT FENCE \� i 3 1 • swales,ditches 7 days None
\
BERM 2'MIN. and slopes
y
High
6 Quality
Zonesater(HQW1 7 days None
wton nd H BarhISIM St p henson BERM CONSTRUCTION SPECIFICATIONS If slopes are 10'or
/' • Slopes steeper 7 days less in length and are
463 S e p h e n s n Road 1. Construct berm by placement of topsoil and overburden taken than 3:1 not steeper than 2:1,
/ 1 from initiallydisturbed areas. 14 days are allowed,
OUTFALL NO . 1 2. Prior to placement of materials for berm formation, cut Slo es 3:1 or 7-days for slopes
rysburg, C 278 1vegetation near) flush with round. t 14 days greater than 50 feet
g y g flatter
3. Compact materials in 1 ft. lifts by construction traffic. in length
I • All other areas None
with slopes flatter 14 days (except for
perimeters and
than 4:I 13 W zones)
MLegend
"Extensions oftime may be approved by the permitting authority
abased on weather or other site-specific conditions that make compliance
p impracticable."(Section ILB(2)(b))
\
\ Property Line
\ Adjacent Property Line 0 Existing Building DATE:
•\ - - - - - Stream ENGINEERING & ENVIRONMENTAL Proposed Diversion Berm 2 C SCIENCE COMPANY 01/15/20
\ Existing Tree Line 3008 Anderson Drive DRAWN:
Raleigh, NC 27609 TPS
\ - - - - Plant and Initial Mine Disturbance (10-Year Dist.) Proposed Temp. Silt Fence [phone]
/ Existing Roadway REVISED:
/ 10 ft. Topo Lines Bodies of Water Formed by 01/15/20 Mine Plan And
Past Mining Activities �<<t4""""!'�►r
/ 2 ft. Topo Lines ��•�OQ't� 0���.,, Erosion Control Details SCALE:
/ 3 -------- Proposed Topo Lines � � ' For Mine Modification 1°=200r
, Property Scale: 1 " = 100' B SI�� �
25' Buffer from Adjacent Pro ert Line = 15472 _ Proposed Sand Ridge Mine Sheet No.
Or 50' Undisturbed Buffer from Wetlands and Streams °Y'
w�, Wetlands '�.�q•'• FNG1NE�sG'��?-
f�,,,, ;�KH„�, ,,. 8287 Route Hwy 46 C-4
Y ''ttttt"` Garysburg, NC

Katherine Harris David and Debra Dunlow
1208 Drexel Ln PO Box 117
I I NC
Greenville, NC 27 I aston, 27832
---------- `� I
25'Un_—r
\ / Town of G rysburg
\\ / 504 Old Hi way Road
Garysburg, N 27831
Robinson F ms LLC
CL
\ 1 i, r w Ridge Ln
Manakin- Sabot, VA 2 103
/
,wton and H arham tephens n
\ 6 e hen n Road /
\\ arysburg, NC 27831 1
\ 1 /
\ 1 drew E Fitzhugh \\ ^\
\ 1 167 NC 46 HWY \\ \\
Ste hens Bros \ A \ I G rysburg, NC 27831
p
465 phenson Road \
arysburg, NC 27831
ndisturbed Buffe_r_ —
1, Initial M'ne nd P s _------ - /
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rrrrrrrrrrrrrrrrr rr rrrrrrr rrrrr _
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aherin Br ok Mitch \rrrrrrrrrrrrrrrr rrrrrr rrr rrr rr rr rr Una�styrb \.. 82 1 C 6 W 1
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rrrrrrrrrrrrrr rrrrrrrr r r r r r r r r r r r r r r r r r r r r r r r r 25
Ga s ur I C 783 /
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\ Existin
` Culve P 1� ed0
Plant Stockpile
Storag
drew E Fitzh gh
TT
8167 NC 46 Y
rt No.2 .;:���°^'
` S r 50'Undist rb
Garysbur , NC 278 1 ,
\\ � � ���.. <� o• Z r r;lr ....- ruffer �
•J ` Cross - Section
Newt n and H Ba am to henson ► `� �� �::..,.:tip, �-r� ...;::�<„�,:,.,,>. ;,....,....`;. \
� � � �Y ;�, rrr r r
463 tephenson oad r r / N
ar G sbur NC 7831
g� 0r ♦ `�� `�Y`ems �,c��:a � y��.
72
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.ti.
;
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1. Maintain unexcavated and undisturbed buffers as show. No disturbance
\\\ ll-lJ-l-ll-1 - e_ `� �`� shall be within 50 ft. of the wetlands.
- �e eJ \`� `� 2. Perimeter mine excavation slopes above the groundwater table shall be
3:1 (Horizontal toVertical) or flatter.
Ne ton and H Bar am eph nso •\ \\���� roo \�\ � - 3. Leave all haul roads and culverts inplace.
Ir
463 tephens Roa
\ Garysburg, ns 278 �. 4. Remove plant and associated equipment from site. Grade plant area
-- for positive gravity drainage.
Map
1 Le�.aJend 5. Fill and remove Sedmiment Basins 1 and 2 and the Plant Basin. Remove berms.i
1 6. Revegetation per the Schedule below Sheet C-3.
1
1 moo
I -------- Property Line o
' Existing Building
Adjacent Property Line o
—.—.— Stream �
o _... C Proposed Diversion Berm ENGINEERING & ENVIRONMENTAL DATE:
Existing Tree Line 2 SCIENCE COMPANY 11/21/18
/ 3008 Anderson Drive DRAWN:
— — — - Plant and Initial Mine Disturbance Proposed Temp. Silt Fence Raleigh, NC 27609
Existing Roadway
[phone] TPS
10 ft. Topo Lines Bodies of Water Formed by REVISED:
Past Mining Activities 01/15/20 01/15/20
2ft. Topo Lines m � C`ARO,'',,, Reclamation Plan
130 Proposed Topo Lines ;0 SCALE:
Qof o" 'v�: 1"=200'
25' Buffer from Adjacent Property Line �� ► _ SEAL
Or 50 Undisturbed Buffer from Wetlands and Streams =k£ Wetlands Scale. 1 = 200 = 15472 I _ sheet No.
:: f=; Proposed Sand Ridge Mine
.INE
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""" Garysburg, NC