INSPEC42776

• Permit No: M1989029
• IBM Index Class Name: Inspection
• Doc Date: 9/14/2000
• Doc Name: DETAILS AND CONSTRUCTION INFORMATION LONGMONT DISTEL OPERATIONS EXHIBIT F4
• Media Type: M
• Archive: No

n
i
(SEE NOTE 1)
SECTION D -D'
TYPICAL SPILLWAY TO ST. VRAIN CREEK
NOT TO SCALE
M
20'
Q
INVERT
�1
3
M'
3
ENERGY -
DISSIPATOR
SECTION F - F'
TYPICAL GRASS LINED CHANNEL
NOT TO SCALE
V FREEBOARD
20'
RIPRAP
t=9" min. (d50 =6 ")
EXISTING GROUND SURFACE
E
2.5'
OUTFLOW TO
L E, CREEK
1' FREEBOAR L
GRASS
v
OVERBURDEN 3' <
6 -12" OF 4 _ .. 4
TOPSOIL 51 I1
2
6-12' OF TOPSOIL
PLACED ABOVE WATER LEVEL
ORIGINAL
POST - MINING GROUND
LAKE LEVEL
3
(SEE NOTE)
BEDROCK
SECTION G - G'
TYPICAL POND SHORE
NOT TO SCALE
PIT LIMIT
1i
I
%J 1
2 SAND & GRAVEL
OVERBURDEN
BACKFILL BEDROCK
NOTE:
RECLAIMED SLOPES WILL BE 3HA V ABOVE
THE WATER LEVER AND TO 10 FEET
BELOW POST -MINE WATER LEVEL.
ORIGINAL GROUND
6-12' TOPSOIL
ALTERNATIVE 1
4
1F_
\\
70'
OVERBURDEN BACKFILL
SECTION H - H'
TYPICAL RECLAIMED PIT SLOPE
NOT TO SCALE
19lQItivJII
5
SECTION E - E'
RIPRAP PROTECTED OUTLET CHANNEL
NOT TO SCALE
3
SECTION L - L'
TYPICAL CHECK DAM SPILLWAY
NOT TO SCALE
M
L M'
SECTION M -M'
TYPICAL SPILLWAY
NOT TO SCALE
2'
5' 1 � - 1
2 2
ORIGINAL GROUND
n1/2SAND BURDEN
6 -12" TOPSOIL
258 GRAVEL
(SEE NOTE 1)
� BEDROCK
45'
NOTE:
1. OVERBURDEN WILL BE PLACED ON PIT FLOOR
AND THE AREA REGRADED TtO 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 FT2PER LINEAR FOOT AND FILL VOLUME = 290 FT2 PER
LINEAR FOOT.
3. HIGHWALL FILL = 700 FT2 PER LINEAR FOOT
5'
ALTERNATIVE 2
PIT LIMIT
i
i
(SEE NOTE 2)
11
3
RIPRAP
t=9' min. (d 50 =6 ")
3
RIPRAP
t=9" min. (dso =6 ")
3 I
GRASS LINED CHANNEL
5'
GRASS
No
ACCESS ROAD
SECTION N -N'
ACCESS ROAD CREEK CROSSING
NOT TO SCALE
ROUND TRANSITIONS
20'
DETAIL( A
TYPICAL INFLOW CONTROL BOX
NOT TO SCALE
SLOTS 1 -1/2"
4" REINFORC
CONCRETE
RIPRAP
t=9" (d50 =6') REINFORCED CONCRETE
APPROACH APRON
SECTION I -I'
TYPICAL INFLOW CONTROL BOX
NOT TO SCALE
1
PREPARED SUBGRADE V RIPRAP
r
EL
SLOT FOR BOARDS 3" SECTION J - X
�I I� TYPICAL GRASS LINED IRRIGATION DITCH
FLOW CONTROL
BOARDS 1" X 6' X K NOT TO SCALE
2'
2,
I
OUTLET INFLOW
CHANNEL % RIPRAP CHANNEL GRASS
J"GP ASS LINED J1 f 3'
DITCH 1 1
4' I 3, I/ K I 2' i
REINFORCED CONCRETE
25 APPROACH APRON
rmit Number RECEIVED
NOTE: Pe Pe s Dumber 1 I
BOARDS ARE REMOVED TO INCREASE Section /Exblblt:
FLOW RATE OUT OF CONTROL BOX Type SO 4 200
OVERBURDEN Class: [] Report O Hydro MGenem- ----------- -------- - - - - -- J
Doc Type.
- - - ---- - -- ---- -- ------------- _.— _ -____ ______ Division of PAwerals and Geology
�Applma6on (Coal only) ❑ good Enforcement l�,lnspechon
SAND & GRAVEL 20
v vii ��i
III VIII VIII�IIVIIVIIIVIIIVIIII�IIIIII