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settling basin" in the "B" Pit. Phase V spillway modification was completed in August <br />2003 prior to "B" Pit backfilling. Phase V "As-Built" Certification was completed in <br />March 2004 and was included in TR-48. <br />Pond 009, a temporary sediment pond, treats runoff from the smaller disturbed area <br />which drains to Sage Creek, roughly a 439 acre watershed. Construction of the pond <br />was completed in 1991. <br />Pond 015 was constructed during the summer of 1999 in preparation for development <br />in the Seneca II-W south extension area. The pond treats runoff from a 407 acre <br />watershed that drains into Sage Creek of which only 29.5 acres will be disturbed by <br />mining activities. <br />Pond 016 was constructed in the summer of 2000 in the Seneca H-W south extension <br />area. The pond treats runoff from 382.2 total acres. Discharge from this pond goes <br />into an unnamed tributary of Hubberson Gulch. <br />Pond 016A was constructed to provide sediment control for additional disturbance <br />approved in PR-3. Pond 016A is located in series immediately up-gradient from Pond <br />016, on a Hubberson Gulch tributary. Embankment and P.E. construction certification <br />for Pond 016A was provided within TR-48, in July 2004. Final certification of all <br />aspects of pond construction.was delayed pending assessment and repair of in-slope <br />slumps, which was completed in September 2004. <br />Pond 017, constructed in the fall of 2002, treats runoff from a 955 acre watershed <br />including mine disturbance areas from the southern portion of the south extension of <br />the permit area. The pond is located on upper Hubberson Gulch near the southwest <br />corner of the south extension area. Pond 017 construction certification and "As-Built" <br />designs were included in PR-4 submittal materials. <br />Several of the sedimentation ponds have been proposed as permanent impoundments, <br />and the impoundments would appear to be warranted to facilitate postmine livestock <br />grazing and wildlife use. However, documentation required by Rule 4.05.9(13) has <br />not been provided to allow for approval of any sedimentation ponds as permanent <br />impoundments. The following commitment is included in Permit Tab 13, page 5, <br />regarding permanent impoundment demonstration of compliance: <br />Permanent impoundments will be reevaluated prior to bond release and remedial <br />construction performed to satisfy the appropriate sections of the regulations. <br />Prior to submittal of a bond release request, SCC will submit a complete <br />technical revision demonstrating that each permanent impoundment meets the <br />requirements of 4.05.9(13). <br />D. Acid-forming and Toxic-forming Spoil <br />Seneca II-W Findings Document 24 C1982057 <br />Permit Renewal No. 5 December 9, 2010