PERMFILE55484 - Laserfiche WebLink

Home Browse Search

• SEDIMENT POND N0.004 PERMANENT IMPOUNDMENT DEMONSTRATION In conjunction with Technical Revision 37, SCC has applied for approval of Sediment Pond 004 as a permanent impoundment to support the post muring land use of livestock grazing and wildlife habitat Under applicable provisions of Rule 4.05.9(13), Sediment Pond 004 must meet the following criteria: (a) The quality of the impounded water shall be suitable on a permanent basis for its intended use, shall meet applicable state and federal water quality standards and discharge of water from the impoundment shall meet applicable State and Federal effluent limitations and shall not degrade the quahry of receiving water below applicable stream standards; (b) The level of water shall be suffidenfly stable, and the configuration of the pond shall be adequate, to support the intended use; (c) Adequate safety and access to impounded water shall be provided for proposed water users; (d) Water impoundments shall not result in the diminution of the quality or quantity of water available to water right holders for agricultural, industrial, recreational, or domestic uses except in accordance with applicable state law; • (e) The size of the impoundment shall be adequate for its intended purposes; (f) The impoundment shall be suitable for the approved post-mining land use. Detailed discussions and relevant infoanation is presented in various sections of Tab 7, Hydrology. The following is a summary of the details contained in Tab 7. Rule 4.05.9(]3)(a). Pond 004 dischazges to Cow Camp Creek, which is tributary to Fish Creels. CDPHE has determined that beneficial uses include aquatic life and aricultural uses. Consequently, impoundment effluent has been compazed to aquatic life and agricultural standazds. Table 7-117, Comparison of Pond 004 and 008 Effluent Quality to Yampa Segment 14B Standards, summarizes Pond 004 effluent exceedences of the stream standards from 1999 to 2004. Table 7-117 indicates that the effluent quality from Pond 004 is suitable to support aquatic life and agricultural uses and will not impact water quality in Fish Creek. (See -Seneca II Technical Revirian 37 (2005) Permanent Impoundment WatereQuality and Water Right Demonrtrationr, page 7-38SJ Rule 4.05.9(]3)(b). Pond 004 is generally oval shaped. This configuration is typical of stock water impoundments throughout northwest Colorado. The pond receives perennial inflow from seeps and springs, as well as snowmelt runoff during spring months. The pond is fitted with a principal spillway that controls the permanent pool elevation. (Exhibit 7-12A, Pand 004 Principal Spillway Replacement A.r-Buik) Rule 4.05.9(73)(c). The pond has relatively shallow inslopes (3H:1 V or shallower). There aze no cliffs ox steep dxopoffs along any pond margin. (Exhibit 7-12A, Pond 004 Principal Spillway Replar,•ement • A.r-Built) TR-37 1 01/06