PERMFILE107193

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 10/14/2007
• Section_Exhibit Name: 2.05.5 Postmining Land Uses
• Media Type: D
• Archive: Yes

flow will involve measurement of stream temperatwe, pH, specific conductance, and collection of the necessary
• samples for chemical analysis.
It is anticipated that water percolating through the upgradient spoil, together with a small amount of runoff from the
adjacent area, will enter into the Area 2 Pit and the combined amount will be sufficient to cause overflow from the
pit to Pond D. In order to measure 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 are measured
semiannually for flow and field parameters. 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 are discovered, further monitoring
requirements will be accomplished in accordance with the spoil spring monitoring plan.
Details regarding the sampling schedule and tested parameters for both natwal and spoil springs are located in
Exhibit 14, Hydrologic Monitoring Plan.
Discharge 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 discharge water is piped the pit south of Pond D and then enters Pond D »a 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 underground dust suppression. Dischazge of excess groundwater inflows (temporary -during
shaft excavation only) from the 6NM Shaft is sampled at Site 121.
Site 115 is located northwest from the main portal azea. The water at this site is detained within a series of
impoundments before its discharge to Fish Creek. Site 109 is sampled for a full suite analysis quarterly while Site
115 is sampled per the requirements of the NPDES Permit CO-0042161. At both sites, water discharge meters
• have been installed to monitor the quantity of mine discharge. A flume at Site 121 is used to measwe discharge of
excess groundwater inflows.
Responsible for meeting the effluent limitations mandated by NPDES Permit CO-0027154 transferred from the
Colorado Yampa Coal Company (CYCC) to TCC at the time of final bond release for the Eckman Park Mines.
TCC is directly responsible for NPDES Permit Nos. CO-0036684 and CO-0042]61. Permit No. CO-0036584
establishes the effluent limitations for the Fish Creek Tipple. Perrrrit 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 discharge only; surface flow does not enter the impoundment structures. A temporary Construction
Dewatering Discharge Pemut (Permit No. COG-0072272) was issued for discharge of excess groundwater inflows
to the 6NM Shaft during shaft excavation.
As with ground water monitoring, necessary surface water measurements and sample analysis will utilize standard
EPA measurement methods and ASTM test procedures. A list of the surface water parameters, which will be
analyzed, is presented as Table C of the Hydrologic Monitoring Plan (Exhibit 14). Effluent limitations for
discharges from sedimentation control and mine discharge structwes are specified in one of fow NPDES Pemrits:
CO-0027154, CO-0036684, CO-0042161, and COG-0072272. The NPDES Permits are located in Exhibit 30
(Volume III}, Exhibit IO (Volume VIII), and Exhibit 44 (Volume III?,), respectively.
In order to directly monitor the effect of mining into the saturated overbwden unit, a mine water inflow survey will
be conducted once per year. The survey will consist of on-site measurement 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
measurement is not possible. The results of the survey will be plotted on a map of the mine and submitted as part
of the annual hydrologic monitoring reports.
MR06-208 2.05-170 07/25/06