20101027_Mine_Maps

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0 MARNEZ O DUDAS, GLENN M. a .� Q" !W
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N 1 ' i 1 SWEENEY, JEREMY W. `
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\ j � (cn CHANNEL '� X AGGREGATE OF PROPERTY DEEDS, TAX MAPS AND
I �' '� /l i O BOUNDARY SURVEYS. ADJACENT PROPERTY LINES z
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O AND SHOWN FOR REFERENCE ONLY. PROPERTY _
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EllOMJ INC. I I
INJ �. �O I O \'� c, SHEET NUMBER
07 CID
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GARREN. RA EQT. V i R1. A5 CEtEEFC RO' -_.-__.._ 2 OD / / 0 '� CONTOUR
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e 0 MATINEz ' 1 \ °aUDrw I�a1N M. o� ' �/ .G ' v / �\ 4 i' ^�Q
PEARCE,. WD L t _— / 'R. �� /. ;. �•O // PAVED ROAD
UNPAVED ROAD
S
TREE i
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J ` DAND L E '[-' '+y...,_�_- \ MILLER, RuiN A.CE, a O` , RIP RAP
wIW H PER. AM L JR , / v ❑ I` �',.
~ a AR6ARA Y. ❑ - CARTER•R.DAMES L \ \
000a HYDE eom t \ �\ —/ /��' WETLANDS O
' \�% STREAMS/POOLS
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W_ICkTi T�NDs INC._
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OWNBEY, JOHN R. a CARROT I J.
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1. AFTER THE MINING OPERATION HAS CEASED, THESE LANDS WILL BE SLOPED FOR 't^� � O
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+ (� D \ DRAINAGE, CONTOURED, GRADED AND SEEDED PER THE APPROVED SEED MIX. / - C) J
1 1 �' I ; O t 2. THE HIGHWALL PERIMETER FENCE AND WARNING SIGNS WILL BE MAINTAINED. � ZLLI LAJ
�
1 ` ' 1 / 1 / J 1 3. THE MAIN ACCESS ROAD INTO THE PROPERTY WILL BE LEFT INTACT AND THE / z O
`•. '?�,` / , i" -- f DITCH LINES WILL BE RIP-RAPPED AND/OR SEEDED. j = �
w
tl o t 4. UPON RECLAMATION, THE EROSION AND SEDIMENT CONTROL STRUCTURES SHALL BE
IN GOOD WORKING ORDER. ALL PERMANENT CHANNELS WILL BE CLEANED AND / Z
1 I f STABILIZED PRIOR TO ABANDONMENT. �I =
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X k 0 5. ONCE THE SETTLING PONDS AND/OR SEDIMENT CONTROL BASINS HAVE SERVED THEIR
INTENDED PURPOSES AND CONTRIBUTARY DRAINAGE AREAS ARE STABILIZED, THEY WILL
nMJ INC, O / )p BE FILLED IN, CONTOURED AND VEGETATED PER THE APPROVED SPECIFICATIONS. O
%,O A , SHEET NUMBER
01
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Silt Fence Detail
Vegetated V-Ditch Cross Section at Spillway Profile Along Embankment at Spillway Z
N.C. E&SC PLANNING & DESIGN MANUAL (6.30) tU L
2. ATTACH WIRE FENCING TO THE POSTS. -) a °
Temporary Linin t 5 ft Class B Rip Rap e55 1. SET P TS AND EXCAVATE A 4" X 4" TRENCH 0 rn a
0 2 UPSLOPE ALONG THE LINE OF POSTS.
on
'�cv'o EXISTING GROUND 9SI C r ❑ ❑
NCDOT #57 TOP OF EMBANKMENT ELEV. om "�` I I(�I m a
CLEAN-OUT ELEV. �\N�� d'
'^ 1.5 fit SPILLWAY CREST ELEV
-I 1 1 Z 1800 cu ft/acre $ a • 5 ft `� ` / TIT -// Y o
d ;. • 27 max _..._ _.-- - --- - ------ ---- / ° w
9' , s , , , • • • • Structual Fill _ Structual Fill / i, a�i c+ 0
,� --�- 2 DEEP CUTOFF TRENCH _4' ,Q) cyl
aXi s
'',r -� ..•' ^ , • • LINED WITH FILTER FABRIC "'. c J v
LI FILLED WITH ROCK 4. BACKFILL AND COMPACT THE EXCAVATED w Li ❑
IT INTO THE
Filter fabric Class Rip Rap EXTENDING ENTIRE LENGTH 3. ATNCCHAND THEEFTENR FABRIC TO THEE WIRE FILL.
OF DAM fill a ; >
'14 o
Vegetated V-shaped Waterway with Stone Center Drain Stone (Drainage) Section at Spillway Section Through Embankment at Spillway i " "
9 P Y ( 9 ) P Y 9 P Y - Cd
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N.C. E&SC PLANNING & DESIGN MANUAL (6.31) Desi n �� / i
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...................-.....::
m d'
settled Overfill 6" �\\\ ❑
top
for settlement 5' SPILLWAY CREST ELEV.
Z Z / p 21" Class I Rip Rap Sediment Fence
1 1' IN 1' MIN tf- \ min 4 ft min ass B Rip Rap 8 FINE GRAVEL (NCDI)T #57 OR EQUIV.) •
\\\ Min. N.C. E&SC PLANNING & DESIGN MANUAL (6.62)
d
EXISTING GROUND Construction Specifications
\ \ \ �2:1 side 1 Materials
1.5 �
18" 4-12" 5 ft • t / slope max i \2' DEEP CUTOFF TRENCH
1 Use a synthetic filter fabric or a pervious sheet ofpolypropylene, n on, of ster or
/ \ f max fill , s '�'r, Emergency 1:1 (TYP.) u LINED WITH FILTER FABRIC Yn P YI polyester I
6" / /\/� /\/ \ Filter Fabric Filter/ s �1:1 side by-pass 6" 2' & FILLED WITH ROCK polyethylene yarn, which is certified by the manufacturer or supplier as conforming to
fabric ^�,"; sloe max below settled EXTENDING ENTIRE LENGTH the requirements shown in Table 6.62b.
No.57 Stone p top of dam OF DAM
Natural3ftground Table 6.62b
min Rock Dam Specifications For Sediment Fence Fabric
u
Trapezoidal Riprap Channel NCDOT TEMPORARY ROCK SEDIMENT DAM TYPE'A' Physical Property Requirements Temporary Sediment Trap Design N.C. E&SC PLANNING & DESIGN MANUAL (6.63) P y q
N.C. E&SC PLANNING & DESIGN MANUAL (6.31) Filtering Efficiency 85% (min) d
NCDOT TEMPORARY ROCK SEDIMENT DAM TYPE'B' Tensile Strength at 20% max. Elongation Standard Strength - 30 Ib tin in min a
N.C. E&SC PLANNING & DESIGN MANUAL (6.60) Construction Specifications 9 ( ) 9 Extra Strength 9 50 Ib/limn (min)
)
Slurry Flow Rate 0.3 al s ft min min
Z 1d 1rZ-• 1. Clear the areas under the embankment and strip of roots another objectionable Y 9 / q /
W Construction Specifications material. Delay clearing the reservoir area until the dam is in place.
Synthetic filter fabric should contain ultraviolet ray inhibitors and stabilizers to provide
j��i\ 1. Clear, grub, and strip the area under the embankment of all vegetation and 2. Cover the foundation area including the abutments with extra--strength filter fabric a minimum of 6 months of expected usable construction life at a temperature range of
�
Filter Fabric root mat. Remove all surface soil containing high amounts of organic before backfilling with rock. If a cutoff trench is required, excavate at center line 0 to 120' F.
of dam, extending all the way up the earth abutments. Apply filter fabric under the
matter and stockpile or dispose of it properly. e
rock fill embankment, from the upstream edge of the dam to the downstream edge 2 Ensure that posts for sediment fences are 1.33 lb/linear feet steel with a
2. Ensure that fill material for the embankment is fee of roots, woody of the apron, Overlap fill material a minimum of 1 foot at all joints, with the minimum length of 4 ft. Make sure that steel posts have projections to
Construction Specifications (Channels) vegetation, organic matter, and other objectionable material. Place the fill upstream strip laid over the downstream strip. facilitate fastening the fabric.
in lifts not to exceed nine inches and machine compact it. Over-fill the 3. Construct the embankment with well-graded rock and gravel to the size and
embankment six inches to allow for settlement. 3 For reinforcement of standard strength filter fabric, use wire fence with a minimum 14
Grass-Lined Channel (6.30) dimensions shown on the drawings. It is important that rock abutments be at least gouge and a maximum mesh spacing of 6 inches.
1. Remove all trees, brush, stumps, and other objectionable material from the 3. Construct the outlet section in the embankment. Protect the connection
2 feet higher than the spillway crest and at least 1 foot higher than the dam, all the c
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foundation area and dispose of properly. between the riprap and the soil from piping by using filter fabric or a way to the downstream toe, to prevent scour and erosion at the abutments.
Construction
keyway cutoff trench between the riprap structure and the soil. ac
4. Sediment-laden water from the construction site should be diverted into the basin
2. Excavate the channel and shape it to an even cross section as designed. reservoir at the furthest area from the dam.
When staking, indicate a 0.2 feet over cut around the channel perimeter for ' Place the filter fabric between the riprap and soil. Extend the fabric 1 Construct the sediment barrier of standard strength or extra strength synthetic filter N
silting and bulking. across the spillway foundation and sides to the top of the dam; or
5. Construct the rock dam before the basin area is cleared to minimize sediment yield fabrics. °
0
3. Grade soil away from channel so that surface water may enter freely. • Excavate a keyway trench along the centerline of the spillway from construction of the basin. Stabilize immediately all areas disturbed during the
foundation extending up the sides to the height of the dam. The
construction of the dam except the sediment pool (References: Surface 2 Ensure that the height of the sediment fence does not exceed 18 inches above the Z
4. Place temporary lining and apply lime, fertilizer, and seed the channel and trench should be at least two feet deep and two feet wide with 1:1 Stabilization). ground surface. (Higher fences may impound volumes of water sufficient to cause
failure of the structure.)
adjoining areas in accordance the vegetation plan. side slopes.
1 9 9 P 6. Safety - Sediment basins should be considered dangerous because they attract
4. Clear the pond area below the elevation of the crest of the spillway to children. Steep side slopes should be avoided. Fences with woming signs may be 3 Construct the filter fabric from a continuous roll cut to the length of the barrier to
Maintenance facilitate sediment clean-out. needed if trespassing is likely. All state and local requirements must be followed. avoid 'pints. When joints are necessary, securely fasten the filter cloth only at a
support post with overlap to the next post.
During the establishment period, check grass-lined channels after every 5. All cut and fill slopes should be 2:1 or flatter. Maintenance
4 Support standard strength filter fabric by wire mesh fastened securely to the up slope
rainfall. After grass is established, periodically check the channel; check it side of the posts using heavy duty tie wires. Extend the wire mesh support to the
after every heavy rainfall event. Immediately make repairs. It is particularly 6. Ensure that the stone (drainage) section of the embankment has a minimum Check sediment basins after each rainfall. Remove sediment and restore original h 9 Y Y PP
important to check the channel outlet and all road crossings for bank stability ( 9 )
bottom width of three feet and maximum side slopes of 1:1 that extend to volume when sediment accumulates to about one-half the design volume. bottom of the trench.
and evidence of piping or scour holes. Remove all significant sediment the bottom of the spillway section.
accumulations to maintain the designed carrying capacity. Keep the grass in Check the structure for erosion, piping, and rock replacement after each significant 5 When a wire mesh support fence is used, space posts a maximum of 8 fit. apart.
a healthy, vigorous condition at all times, since it is the primary erosion rainstorm and repair immediately. Support posts should be driven securely into the ground to a minimum of 18 inches.
protection for the channel (Practice 6.11, Permanent Seeding). 7. Construct the minimum finished stone spillway bottom width, as shown on
the plans, with 2:1 side slopes extending to the top of the over-filled
embankment. Keep the thickness of the sides of the spillway outlet Remove the structure and any unstable sediment immediately after the construction 6 Extra strength filter fabric with 6-ft. post spacing does not require wire mesh support
structure at a minimum of 21 inches. The weir must be level and
site has been permanently stabilized. Smooth the basin site to blond with the surrounding fence. Wire the filter fabric directly to posts. w w
area and stabilize. All water and sediment should be removed from the basin prior to dam 0 3
Riprap Channels (6.31) constructed to grade to assure design capacity- 7 Excavate a trench a roximatel 4 inches wide and 4 inches dee elan the proposed osed a a a o
removal. Sediment should be placed in designated disposal areas and not allowed to flow approximately P 9 P P m = m Uri
line of posts and upslope from the barrier. a a J
I. Clear the foundation area of trees, stumps, roots, loose rock, and other into streams or drainage ways during structure removal. ae N
p 8. Material used in the stone section should be a well-graded mixture of stone 7 a � � � r
objectionable material. with a d50 size of nine inches (Class B erosion control stone is
8 Backfill the trencn with compacted soil placed over the filter fabric. d M a Z a o
` recommended) and a maximum stone size of 14 inches. The stone may be
0
2. Excavate the cross section to the lines and grades of the foundation of the machine placed and the smaller stone worked into the voids of the larger 9 Do not attach filter fabric to existing trees. Z
liner as shown on the plans. Bring over-excavated areas to grade by increasing stones. The stone should be hard, angular, and highly weather resistant.
the thickness of the liner or by backfilling with moist soil compacted to the Outlet Stabilization Structure Maintenance Z 3 o w w z
density of the surrounding material. 9. Ensure that the stone spillway outlet section extends downstream past the N.C. E&SC PLANNING & DESIGN MANUAL (6.41) W of = ¢ v X �
toe of the embankment until stable conditions are reached and outlet velocity Pipe Outlet t0 0 0 0 o in a
3. Rock riprap linings: Practice 6.15, Riprap. Inspect sediment fences at least once a week and after each rainfall. Make any required
is acceptable for the receiving stream. Construction Specifications Well Defined Channel
repairs immediately.
Keep the edges of the stone outlet section flush with the surrounding ground
4. Place filters, beddings and foundation drains to line and grade in the manner and shape the center to confine the outflow stream. 1. Ensure that the subgrade for the filter and riprap follows the required lines and
specified. Place filter and bedding materials immediate) after sloe preparation. Should the fabric of sediment fence collapse, tear, decompose or become ineffective,
p g y p p p grades shown in the plan. Compact any fill required in the subgrade to the density o� (n
Fors synthetic filter fabrics, overlap the downstream edge b at least 12 inches o replace it promptly. Q
Yn P 9 Y 10. Direct emergency bypass to natural, stable areas. Locate bypass outlets so of the surrounding undisturbed material. Low areas in the subgrade on , n�° o Z J
with the upstream edge which is buried a minimum 12" in a trench. See figure,P 9 9 that flow will not a the embankment.damn undisturbed soil may also be filled by increasing the riprap thickness.
9 qo O(jd�"U Remove sediment deposits as necessary to provide adequate storage volume for the next J Q
6.14z, page 6.146. Space anchor pins every 3 ft. along the overlap. Spread 3da A_ v vp Q °Q" A
granular materials in a uniform layer. When more than one gradation is required, o Qo rain and to reduce pressure on the fence. Take care to avoid undermining the fence during O L.LJ
9 Ye • 9 q 11. Stabilize the embankment and all disturbed areas above the sediment pool 2. The riprap and gravel filter must conform to the specified grading limits shown on � o �" � cleanout. � � �
spread the layers so there is minimal mixing. Filter material should consist of at and downstream from the trap immediately after construction. the plans. - _ o �o�Q oa Q Z
least 3 inches of material on all sides of the drain pipe. d
�o o Remove all fencing materials and unstable sediment deposits and bring the area to grade ry_ U
12. Mark the distance from the top of the spillway to the sediment clean-out 3. Filter cloth, when used, must meet design requirements and be properly protected Q 0�
P P from punching or tearing during installation. Repair an damage b removing the o 0 and stabilize it after the contributing drainage area has been properly stabilized. 0
5. Perform all channel construction to keep erosion and water pollution to a o
level (one-half the design depth) in the field. P 9 9 9 P Y 9 Y 9 Qo0
minimum. Immediately upon completion of the channel, vegetate all disturbed oa o' o
areas or otherwise protect them against soil erosion. Where channel construction riprap and locin another Clap of filter cloth over the damn m area. All Q"QQ Q O
will take longer than 30 days, stabilize channels by reaches.
Maintenance connecting placing
s9should overlap a minimum of 1 fit. If the damage is extensive, ep REINFORCED STABILIZED OUTLET � �- z
replace the entire filter cloth. 0
UO
Inspect temporary sediment traps after each period of significant rainfall. Remove PLAN l U
Maintenance sediment and restore the trap to its original dimensions when the sediment has 4. Riprap may be placed by equipment, but take care to avoid damaging the filter. 1. Any outlet where storm flow bypass occurs must be stabilized LtJ Z J
against erosion. J accumulated to one-half the design depth of the trap. Place the sediment that is removed J � Q Z
Inspect channels at regular intervals as well as after major rains, and make repairs in the designated disposal area and replace the contaminated part of the gravel facing. 5. The minimum thickness of the riprap should be 1.5 times the maximum stone l W
promptly. Give special attention to the outlet and inlet sections and other points where diameter. 2. Set outlet elevation so that water depth cannot exceed 1.5 ft W
concentrated flow enters. Carefully check stability at road crossings and look for Check the structure for damage from erosion or piping. Periodically check the at the lowest point along the fenceline. Z Z _
indications of piping, scour holes, or bank failures. Make repairs immediately. Maintain depth of the spillway to ensure it is a minimum of 1.5 feet below the low point of the 6. Riprap may be field stone or rough quarry stone. It should be hard, angular, highly L 0 0 Q LJ
all vegetation adjacent to the channel in a healthy, vigorous condition to protect the area embankment. Immediately fill any settlement of the embankment slightly above design weather-resistant and well graded. ° LrJ
3. Set the fabric height at 1 ft. maximum between support posts 0 �
from erosion and scour during out-of-bank flow. grade. Any riprop displaced from the spillway must be replaced immediately. spaces no more than 4 ft. apart. Install a horizontal brace U
7. Construct the apron on zero grade with no overfall at the end. Make the top of Aga a X between the support posts to serve as an overflow weir and LtJ z Q
the ri ra at the downstream end level with the receiving area or slightly below it. 3vLJ7 o d to support top of fabric. Provide a riprap splash pad as shown. z
After all sediment-producing areas have been permanently stabilized, remove the p P 9 9 Y Q Z
structure and all unstable sediment. Smooth the area to blend with the adjoining areas and () Q
stabilize properly. B. Ensure that the apron is properly aligned with the receiving stream and preferably 4. Excavate foundation for the splash pad a minimum 5 ft. wide, LLI C/') J
straight throughout its length. If a curve is needed to fit site conditions, place it in Filter Cloth 1 ft. deep, and 5 ft. long on level grade. The finished surface = Z
the upper section of the apron. of the riprap should blend with surrounding area, allowing no O
SECTION AA overfall. The area around the pad must be stable. 0
9. Immediately after construction, stabilize ell disturbed areas with vegetation Z Q
(Practices 6.10, Temporary Seeding, and 6.11, Permanent Seeding). Place posts W
4 ' 8 Max - at low points = W
ax
Maintenance
Vulcan Inspect riprap outlet structures after heavy rains to see if any erosion around or Y - Max ` 1
below the riprap has taken place or if stones have been dislodged. Immediately make all SHEET NUMBER
llabrlals Compaml needed repairs to prevent further damage. V
5' Min. \3IP RAF- 6 of 6
yt SPLASH PAD