2009-04-29_PERMIT FILE - C1982056A ‎(8)‎

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 4/29/2009
• Doc Name: Pages 2.05-1 to 2.05-64
• Section_Exhibit Name: 2.05 Operation and Reclamation Plans
• Media Type: D
• Archive: Yes

Drill-rig will be used to complete and case the No. 2 Well. It is anticipated that air or water will be used as the
primary circulation medium, with use of drilling mud only if required to maintain the integrity of the drillhole and
adequately flush drill cuttings. Cuttings and any drilling fluids will be retained in a portable cuttings pit. The No. 2
Well will be cased with welded steel casing, which will extend to within 10 feet of the abandoned and flooded
EMD mine workings. The casing will be grouted in-place along its entire length, and a wellhead will be installed at
the surface from which the pump will hang. Alarge-diameter CMP culvert will be cemented in-place around the
well-head and fitted with a lockable cover. A multi-stage submersible pump will be installed in the well casing and
connected to a power controller in the existing well house. The new powerline from Substation 11 will replace the
existing powerline, bringing 12,470V power to the IORT Dewatering Installation Substation, where two
transformers will convert the incoming power to 2,400V and feed power to the l ORT Dewatering Wells 1 and 2.
The connecting pipeline tying to the lORT/FCM-2 Transfer Pipeline will be trenched and buried approximately 6
feet deep. The connecting pipeline will run from the new IORT Dewatering Well No. 2 to the lORT/FCM-2
Transfer Pipeline, and then parallel the pipeline for approximately 1,000 feet to the junction with the TORT/6MN
Transfer Pipeline. Flow in this pipeline section will be from the IORt Dewatering installation to the junction, and
then back to the Barricade ChamberlFCM-s location. At this junction, apre-fabricated CMP or concrete culvert
will be installed as a manhole to provide access for pipeline control valves and inspection. A second discharge line
will be extended approximately 3,900 feet from control valve manhole, to the south, extending under the 6MN
Access Road, and discharging through the existing railroad culvert to Foidel Creek. The IORT Discharge Pipeline
will be welded 12-inch HDPE pipe, buried approximately 5 feet deep, discharging through a riprapped discharge
basin and channel to the existing culvert. For all pipeline construction, soil material will be removed and
temporarily windrowed on one side of the trench, with trenched material placed to the other side. Once the pipeline
is placed, properly bedded, connected to thelORT/FCM-2 Transfer Pipeline, and leak tested, trenched material will
be backfilled and compacted, and soil material will be replaced over the excavation and reseeded. It is anticipated
that when the pipeline is no longer needed to support mining and related operations, it will be plugged below grade
and abandoned in-place. Reclamation of the wells, when no longer needed, will involve plugging and sealing the
well consistent with approved sealing practices, consistent with applicable State Engineer requirements.
lORT/FCM-2 Transfer Pipeline and lORT/6MN Transfer Pipeline (1V1R07-224, MR08-230)
A water line was installed from the TORT dewatering facility to FCM-2 to route water back into the mine for
underground operations. The location of this water line is shown on Figure 16I, 1996 Seismic Lines and Mine
Water Discharge Return Line, East Mine District. Approximately 6,740 feet of 8-inch HDPE pipe was buried at 5
to 6 feet below grade from the IORT dewatering facility to FCM-2. This pipe will be left in place when no longer
needed to support ongoing mining and related operations.
As part of the 6MN Facilities project, TCC established a new pipeline running approximately 6,040 feet from the
l ORT/FCM-2 Transfer Pipeline to the 6MN Mine Water Storage Reservoir and Million-Gallon Tank. The pipeline
is constructed of 10-inch HDPE pipe, buried to a depth of approximately six feet, with one sub-gra.de crossing
(bored under) of Fish Creek. Details of the Fish Creek pipeline crossing are presented in Exhibit 490, 6MN Mine
Water Storage Reservoir -Design Drawings. Pipeline trenching operations were conducted using atrack-hoe with
the maximum working area assumed to be 40 feet wide. Approximately 7 acres were disturbed in construction of
the original water line, with another 7.1 acres disturbed by the pipeline. Pipeline construction involved removing
and temporarily windrowing soil materials along the edge of the pipeline corridor; trenching and temporary
placement of the excavated material on the opposite side of the trench; bedding, placement, connection, and testing
of the pipeline; controlled backfilling and compaction of the excavated material over the pipeline; and replacement,
grading, and reseeding of the soil material over pipeline disturbance areas. Access manholes were established
along the pipeline route for inspection and maintenance purposes. Soil materials were replaced following
completion of pipeline installation. Reseeding of the disturbed areas will be completed during the first appropriate
planting period following soil material replacement.
MR08-230 2.05-50.6 12/08/08