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pond. From the third treatment pond, treated mine water can be transferred to either the Fish Creek/Barricade
<br />Chamber or the new Fish Creek/Area 1 Pit transfer pipelines, or can be discharged to Fish Creek at Outfall 115
<br />• (subject to emergency discharge provisions or seasonal limitations). Installation of remote monitoring
<br />sites upstream and downstream of the Borehole discharge point, and at the effluent of the treatment pond, a shown
<br />Map 13a, provide a more efficient means for monitoring the water quality in Fish Creek. Automated sample results,
<br />along with system operating parameters are relayed to TCC's Administration Building where they can be reviewed.
<br />Current information is, therefore, available for regulating the treatment process at the borehole facility. TCC may
<br />install additional monitoring equipment in the ponds to further enhance the treatment process.
<br />The Fish Creek/Area 1 Pit Transfer Pipeline will be 12 -inch welded HDPE pipe, buried approximately 5 feet deep
<br />within existing pipeline and road corridors, as shown on Map 24 (Sheet 3/3). The approximately 16,900 foot pipeline
<br />will cross under Routt County Road 27 (bored under), Haulroads B -1 and C and the Batch -Weigh Haulroad, Foidel
<br />Creek (at an existing creek crossing), and the overland conveyor. Pipeline construction will involve removing and
<br />temporarily windrowing soil materials along the edge of the pipeline corridor; trenching and temporary placement
<br />of the excavated material on the opposite side of the trench; bedding, placement, connection, and testing of the
<br />pipeline; controlled backfilling and compaction of the excavated material over the pipeline; and replacement,
<br />grading, and reseeding of the soil material over pipeline disturbance areas. Access manholes may be established
<br />along the pipeline route for inspection and maintenance purposes. Soil materials will be replaced following
<br />completion of pipeline installation. Reseeding of the disturbed areas will be completed during the first appropriate
<br />planting period following soil material replacement.
<br />Note: The following information, addressing the caustic soda treatment system, has been superseded, but is
<br />retained as historic information - Formerly, mine water discharge at the Fish Creek Borehole Site was treated by
<br />injecting caustic soda (NaOI) to increase pH, promot pond, it was sometimes necessary to add dilute suNric acid (H to adjust
<br />ing precipitation of soluble iron in the treatment ponds.
<br />Dependent on water quality in the l
<br />water pH prior to either discharge or transfer to the mine water system. Mine water is pumped from underground
<br />• sump areas, and discharges to the delivery line where the flow is metered. As the mine water is discharged from the
<br />delivery line, it is injected with reagents, subsequently mixed, and is then routed through the treatment pond system to
<br />allow iron and sediments to precipitate and settle -out. Immediately prior to final discharge from the facility, a pH
<br />reducing reagent may be injected into the treated water, if required. After treatment, water flows from the treatment
<br />ponds through a discharge ditch to Fish Creek. A portable structure, approximately 20 x 8 x 8 feet, placed on the north
<br />light -duty road for the easternmost cell of the treatmentfacility, houses storage containers of NaOH and equipmentfor
<br />metering and injecting the reagent. An additional structure, approximately 32 x 8 x 8 feet, will be placed adjacent to
<br />this existing structure to house a larger storage container for NaOH. A smaller portable structure, approximately 8 x 8
<br />x 6 feet, placed on the west light -duty road for the westernmost pond, houses storage containers of H2SO and
<br />equipment for metering and injecting. Overhead power is provided to all of these structures, via pole- mounted lines
<br />from the substation. Three to five additional poles will beset to provide power to the remote monitoring equipment.
<br />Barricade Chamber/FCM -2 Borehole
<br />As a consequence of TCC's plans to develop 22,000 foot long mining panels, MSHA required that mid -panel barricade
<br />chambers, or alternate escape and supply provisions be established to assure the safety of miners working on the panels.
<br />A Barricade Chamber was established underground, and connected to the surface by a 4 -foot diameter drilled shaft and
<br />a 6 -inch diameter cased borehole, for the purpose of providing air, water, food, first aid supplies, etc., in the event of an
<br />emergency. Surface disturbance typical of exploration drill -pad development is associated with the Barricade Chamber
<br />shaft and borehole.
<br />The shaft and borehole developed to serve the 9 -Right and 10 -Right gate -road barricade chambers are located in
<br />Sections 22 and 21 respectively as depicted on Figure 16B. Both sites are located on previously cultivated croplands.
<br />Each site was accessible from existing ranch roads located in the general vicinity. No access improvements were
<br />• required, providing the sites were accessed and developed during dry weather or periods when the ground was frozen.
<br />No regular periodic access requirements pertain to these sites. In the event of poor ground conditions during
<br />TR09 -70 2.05 -50.2 11/16/09
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