PERMFILE62476

• Permit No: C1983058
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: 2.05 OPERATION AND RECLAMATION PLAN
• Media Type: D
• Archive: No

TWIN PINES NO. 2 MINE
REVISED 11/30/94
FILE WP51\LGW\TPRECLM
PAGE NO. 86
• 2.05.4 RECLAMATION PLAN
Reclamation of the mine site started with the initial construction
and preparation of the site for mining. Essentially the mass
reclamation work was completed before mining commenced. Vegetation
on slopes placed during the initial construction has matured to
achieve reclamation standards. With mining completed at the site,
a revised final reclamation plan has been developed in cooperation
with Giuliano & Sons Coal Company and to reflect the experience
with major storm events witnessed during the 8 year operation
period of the mine. The plan has been developed to provide for
"Best Management Practices" to protect the environment and to
provide for a land use consistent with the surrounding land. Of
major concern in developing the plan is the runoff from the steep
slopes excavated prior to the effective date of Reclamation
Standards. Runoff from these slopes is extremely rapid, producing
short duration peak flows with appreciable amounts of soil and rock
deposited at the base of the slope. This occurs on natural slopes
as well as on previously disturbed slopes. Ditches at the base of
these slopes are impossible to maintain during major storm events.
The plan has been developed to allow for the deposition of
materials from major storm events and control the velocity of
runoff from the slopes above routing the flow through sediment
traps and then to the sedimentation pond constructed for operation
of the mine. The plan will utilize all reasonably available
•_ material within the permit boundary.
In essence the outline of the plan is as follows:
1) Remove equipment from the mine and prepare for deposition.
2) Seal Mine Entries
a) Remove supplies and equipment from entries;
b) Backfill entries with soil, removing protruding liner
plate and structural steel at the face of the slope;
c) Dispose of concrete rubble in entries.
Approximately 1,200 cubic yards of material will be required for
backfill of the entries. Material for backfilling the entries will
come from Lewis Gulch.
3) North Spoil Area - (Earth work complete 6/94)
a) Divert runoff collected by a prelaw road constructed
for installation of a power line. This will be completed
by the In Active Mines Program of the Division of
Minerals and Geology;
b) Construct and earth berm at the base of the spoil to
divert runoff from the pile to the existing access road;
c) Grade the spoil to a slope of approximately 3
• horizontal to 1 vertical, leaving a bench with a minimum
width of 15 feet at the top sloping the bench to drain to