PERMFILE116630

• Permit No: C1981014
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: pages 11 to 92R
• Section_Exhibit Name: EXHIBIT 19 MINE AREA PONDS
• Media Type: D
• Archive: No

FRESHWATER POND N0. 3
•
Freshwater Pond No. 3 is a partially incised pond designed to contain
approximately 3,000,000 gallons of water. The pond receives water for
consumptive use pumped from the Corley Mine Well. The water is stored in the
pond until it can be used in the mining and processing operations. Excess
flows are discharged into the Magpie Creek Diversion at NPDES discharge point
003. Pond No. 3 is also lined with a synthetic hypalon liner which extends
beyond the pond's edges. The pond will not remain after final reclamation.
Pond No. 3 functions as part of the water-use circuit which provides water
for the mining and coal preparation activities. Water is pumped from the
Corley Mine Well in the northeast portion of the permit area. The pumped
water i s routed vi a pipeline to Pond No. 3. The water i s discharged as
required form Pond No. 3 to water Treatment and Recycle Pond No. 2 as makeup
water for the coal preparation Plant. Any excess water stored in Pond No. 3
is sampled to ensure that it will meet effluent standards before being
discharged at NPDES point 003.
The elevation of the design water level in Pond 3 provides for containment of
runoff from a 100-year, 24-hour event (0.70 ac-ft) with no discharge while
maintaining a minimum freeboard of one foot. The water level in Pond 2 will
be maintained at or below the design water level. All hydrology inputs are
shown on the Table 6a, SEDCAD+ Version 3.0, Pond 3.
Refer to Table 6, Freshwater Pond No. 3 - Design Summary, for design results.
Freshwater Pond No. 3's location is shown on the Drainage and Sediment
Control Map, (Map 20). Its design drawings, storage capacity table and
stage/storage curve are shown on the Water Treatment and Recycle Pond No. 2
and Freshwater Pond No. 3 Designs Map. (Map 22). Since Pond No. 3 is only
utilized in the water-use circuit and is not designed to contain sediment or
surface runoff, no design calculations are provided.

C:ITM\660\V OL.12A1PONDS
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