PERMFILE52290

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 6/5/2002
• Section_Exhibit Name: 4.05 Hydrologic Balance
• Media Type: D
• Archive: Yes

sampling program are presented in the Annual Reclamation and Hydrology Reports
beginning in 1983 to the present.
• As discussed in Section 2.05.x, Colowyo will use various surface manipulation
techniques on the topsoil after its redistribution as one method to prevent
excessive wind or water erosion.
No special treatment of coal processing waste is necessary since none will be
produced. See Section 4.10 and 4.11.
With a few exceptions, Colowyo plans to have all surface runoff from the
disturbed area pass through sedimentation ponds. Sedimentation ponds are
discussed in detail under Section x.05.6, and their location is shown graphically
on the Hydrology - South Map (Map 12) and the Hydrology - North Map (Map 11).
Exceptions include such areas as topsoil stockpiles located outside of the
Section 11 ditch (MR-15), topsoil stockpiles located along the paved haul road
(MR-18), East Taylor holding pond and pump station (TR approved on November 19,
198x), raw and potable water lines, and railroad loop. Erosion and sediment
control is achieved by protection with vegetation or rock. The demonstration
presented in MR- 1S provides a representative example of how vegetative cover
can provide for sediment control.
• The Administration and Security buildings have associated paved parking areas
which generate no sediment.
Colowyo employs various methods to manage water which periodically collects
internal to the mining operation and does not reach sedimentation ponds. Various
sumps, ditches, pumps, hoses and pipes, etc. will be employed to control water
within pits and/or route water between pits. The ultimate destination of such
water will be for operation's use (dust control, etc.), evaporation or seepage
into the backfilled spoil areas.
In addition to the mining, reclamation and treatment methods described and
referenced in this Section, further protection of the hydrologic balance will be
established by anon-going plan for monitoring potential changes in surface water
quality and quantity and groundwater quality. This monitoring plan is described
under Section 4.05.13 and the monitoring locations are graphically shown on water
Monitoring Sites for Permit No. CO-019-e1 (Map 37). Excess spoil valley fill
areas are located downdip of mining and reclamation areas and periodic monitoring
for seeps and springs and periodic monitoring of piezometer wells will detect the
formation of spoil springs.
•
RBVLSbn Submitted 6 ' ~ -0 ~
a n s _~ Revision ~• T R- s l