PERMFILE136705

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 4/18/2005
• Doc Name: old
• Section_Exhibit Name: 2.05.5 Postmining Land Uses
• Media Type: D
• Archive: Yes

flow will involve measwement of stream temperatwe, pH, specific conductance, and collection of the necessary
samples for chemical analysis.
It is anticipated that water percolating through the upgadient spoil, together with a small amount of runoff from the
adjacent azea, will enter into the Area I Pit, and the combined amount may, over time, be sufficient to cause
overflow from the pit to Pond D. In order to measwe the overflow, a cutthroat flume has been installed in the
channel which connects the pit and Pond D. The point between the pit and Pond D has been designated as Site 7
and is considered to be a spoil spring site. At the Fish Creek Tipple, the springs emanating from the upslope side of
Pond E aze measwed semiannually for flow and Feld pazameters. A full suite sample is collected for analysis at
that time as well. In addition to monitoring these particular spoil spring sites, the area surrounding the Fish Creek
Tipple is incorporated into the annual spring survey. This annual May survey was established in the hydrologic
monitoring program of Colorado Yampa Coal Company's Permit C-81-071. If additional springs aze discovered,
further monitoring requirements will be accomplished in accordance with the spoil spring monitoring plan.
Details regarding the sampling schedule and tested pazameters for both natwal and spoil springs are located in
Exhibit 14, Hydrologic Monitoring Plan.
Dischazge from the underground mine will be sampled at two locations: Site 109 and Site 115. Site 109 is located
near the main portals and the dischazge water is piped the pit south of Pond D and then enters Pond D via the
channel between the pit and the pond before entering Foidel Creek, or alternatively, it is piped to Site 114 where it
is eventually used for tmdergound dust suppression.
Site 115 is located northwest from the-main portal area. The water at this site is detained within a series of
impoundments before its dischazge to Fish Creek. Site 109 is sampled for a full suite analysis quarterly while Site
115 is sampled per the requirements of the NPDES Pemvt CO-0042161. At both sites, water dischazge meters
have been installed to monitor the quantity of mine discharge.
The Colorado Yampa Coal Company (CYCC) is presently responsible for meeting the effluent limitation standards
mandated by NPDES Permit CO-0027154. CYCC will maintain responsibility for the permit until effluent control
of the surface drainage entering the shared sedimentation pond from their property is no longer required. At that
time, the pemtit will be transferred to TCC, if necessary. TCC is directly responsible for NPDES Permit No. CO-
0036684 and CO-0042161. Pemtit No. CO-0036684 establishes the effluent limitations for the Fish Creek Tipple.
Permit No. CO-0042161 governs flow at the Fish Creek Dewatering Facility. The dewatering facility permit,
issued in July of 1989, establishes effluent limitations for mine dischazge only; surface flow does not enter the
impoundment structwes.
As with ground water monitoring, necessary surface water measwements and sample analysis will utilize standard
EPA measwement methods and ASTM test procedwes. A list of the surface water pazameters, which will be
analyzed, is presented as Table C of the Hydrologic Monitoring Plan (Exhibit 14). Effluent ]imitations for
dischazges from sedimentation control and mine discharge structwes are specified in one of three NPDES Permits:
CO-0027154, CO-0036684, or CO-0042161. The NPDES Permits are located in Exhibit 30 (Volume III), Exhibit
10 (Volume VIII), and Exhibit 44 (Volume IIIA), respectively.
In order to duectly monitor the effect of mining into the satwated overbwden writ, a mine water inflow swvey will
be conducted once per yeaz. The survey will consist of on-site measwement of water inflow where it occws in the
mine, using bucket-and-stopwatch, portable weirs or flumes, and estimates of flow in areas where direct
measwement is not possible. The results of the swvey will be plotted on a map of the mine and submitted as part
of the annual hydrologic monitoring reports
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TR 99-32 2.05-170 Revised -March 2005