PERMFILE127317

• Permit No: M1989029
• IBM Index Class Name: Permit File
• Doc Date: 8/31/2000
• Doc Name: ECHIBIT F4
• Section_Exhibit Name: EXHIBIT F4
• Media Type: M
• Archive: No

e
i
SECTION D -D'
TYPICAL SPILLWAY TO ST. VRAIN CREEK
NOT TO SCALE
M
—4860'
fz
1 L_
3
INVERT
3 1 ENERGY---- -
3
M' DISSIPATOR
SECTION F - F'
TYPICAL GRASS LINED CHANNEL
NOT TO SCALE
GRASS
1
6-12" OF 4
TOPSOIL
5'
SECTION G - G'
1'FREEBOARD
OVERSURDENJ3
4
TYPICAL POND SHORE
NOT TO SCALE
6-12' OF TOPSOIL --
PLACED ABOVE WATER LEVEL
ORIGINAL
POST - MINING — GROUND —
LAKE LEVEL
(SEE NOTE)
BEDROCK
OVERBURDEN
BACKFILL
NOTE:
RECLAIMED SLOPES WILL BE 3H:1V ABOVE
THE WATER LEVER AND TO 10 FEET
BELOW POST -MINE WATER LEVEL.
ALTERNATIVE 1
ORIGINAL GROUND
4
6-12" TOPSOIL 1
LIMIT
OVERBURDEN
J1
2 SAND & GRAVEL
(SEE NOTE 1)
70'
OVERBURDEN BACKFILL
PIT LIMIT
10'
OVERBURDEN
1
SAND & GRAVEL
BEDROCK
20'
RIPRAP
t--9" min. (d5o =6 ")
EXISTING GROUND SURFACE
E
2.5' OUT
FLOW TO
CREEK
E'
SECTION H - H'
TYPICAL RECLAIMED PIT SLOPE
NOT TO SCALE
25'
(SEE NOTE
SECTION E - E'
RIPRAP PROTECTED OUTLET CHANNEL
NOT TO SCALE
SECTION L - L'
TYPICAL CHECK DAM SPILLWAY
NOT TO SCALE
V FREEBOARD M
0
J1
2
M'
SECTION M -M'
TYPICAL SPILLWAY
NOT TO SCALE
,111:1 SIC110
5�2 2
ORIGINAL GROUND
6 -12" TOPSOIL
NOTE:
1. OVERBURDEN WILL BE PLACED ON PIT FLOOR
AND THE AREA REGRADED TO CONSTRUCT UPLAND AREAS.
2. WHERE FEASIBLE PIT HIGHWALL WILL BE CUT BACK TO A 4:1 SLOPE.
WHERE HIGHWALL IS CUT BACK TO PROPERTY BOUNDARY (25 FT) CUT
VOLUME = 90 FTZPER LINEAR FOOT AND FILL VOLUME = 290 FT2 PER
LINEAR FOOT.
3. HIGHWALL FILL = 700 FT PER LINEAR FOOT
45'
ALTERNATIVE 2
11
3
RIPRAP
t- -9' (d ao =6")
RIPRAP
t=9' min. (d 5o =6")
3
RIPRAP
t=9" min. (dso =6')
3
GRASS LINED CHANNEL
5'
SECTION I -I'
GRASS
ACCESS ROAD
SECTION N -N'
ACCESS ROAD CREEK CROSSING
NOT TO SCALE
ROUND TRANSITIONS
20'
DETAI A
TYPICAL INFLOW CONTROL BOX
NOT TO SCALE
SLOTS 1 -112'
4" REINFORC
CONCRETE
REIINFORCED CONCRETE
APPROACH APRON
TYPICAL INFLOW CONTROL BOX
NOT TO SCALE
SLOT FOR BOARDS
FLOW CONTROL
BOARDS 1" X 6"X 2'
OUTLET
CHANNEL / RIPRAP
PIT LIMIT
_I
25'
i
(SEE NOTE 2)
OVERBURDEN
4
1(—
SAND & GRAVEL 20
'J 1
t0, I BEDROCK
OVERBURDEN BACKFILL
3"
��l 1�
q I 3'
REINFORCED CONCR
APPROACH APRON
NOTE:
BOARDS ARE REMOVED TO INCREASE
FLOW RATE OUT OF CONTROL BOX.
1
PREPARED SUBGRADE V RIPRAP
r
EL
SECTION J - X
- TYPICAL GRASS LINED IRRIGATION DITCH
K NOT TO SCALE
2' INFLOW
CHANNEL GRASS
1'
GRASS LINED J1 �3'
LDITCH 1
Permit Number / I
Class: ertoit
Section /Exhibit
Class ❑Revision ._._._. -----------------------------------------
'_ Type /Sea: --- - --- -- -- -- -- —
-- -- -- -- -- -- - -- -- -
I
Class: ep
O Rort O Hro yd OGeneral
Doc Type:
OApplication (Coal only) O Bond O Enforcement O Inspection
APPROVED
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