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REV97244
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REV97244
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Entry Properties
Last modified
8/25/2016 3:21:39 AM
Creation date
11/22/2007 12:07:31 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982057
IBM Index Class Name
Revision
Doc Date
6/12/2006
Doc Name
Proposed Decision & Findings of Compliance
From
DMG
To
Seneca Coal Company
Type & Sequence
PR5
Media Type
D
Archive
No
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untopsoiled to allow for initial stabilization and inspected for stability according to <br />the rill and gully plan in Tab 22. When the channels have been stabilized, the non- <br />riprapped segments will be topsoiled and vegetated. <br />Seneca Coal Company has permitted permanent and temporary stock pond <br />impoundments in both the reclaimed drainage channels at the Seneca II-W Mine <br />and some existing culvert outlets. The stock ponds will slow the peak runoff of <br />precipitation events and help to minimize erosion in the drainage channels. They <br />will also act as additional alternate sediment control measures, minimizing the <br />potential for sediment from roads to be carried off the permit site. These small <br />ponds will benefit both livestock grazing and wildlife utilization of the reclamation. <br />Required information regarding stock pond construction, including stability <br />analysis documentation based on worst case embankment geometry assumptions, <br />was incorporated into the application by TR-48 and PR-4 amendments. Additional <br />information related to pre-construction design for individual stock ponds and <br />professional engineer certification of stock ponds following construction was <br />incorporated into the permit by PR-5. The most recent design and <br />certification information was sufficient to resolve pem~it stipulations 37 and <br />38. <br />Several of the stock ponds have been proposed as permanent impoundments, <br />and the impoundments would appear to be warranted to facilitate postmine <br />livestock grazing and wildlife use. However, documentation required by Rule <br />4.05.9(13) has not been provided to allow for approval of any stock ponds as <br />permanent impoundments. The following commitment is included in Permit <br />Tab 13, page 5, regarding permanent impoundment demonstration of <br />compliance: <br />Permanent impoundments will 6e reevaluated prior to bond release and <br />remedial construction performed to satisfy the appropriate sections of the <br />regulations. Prior to submittal of a bond release request, SCC will <br />submit a complete technical revision demonstrating that each permanent <br />impoundment meets the requirements of 4.05.9(13). <br />C. Sedimentation Ponds <br />Seneca Coal Company will primarily use sediment ponds to prevent additional <br />contributions of sediment to streamflow or runoff outside the permit area due to <br />mining disturbance. Existing sediment ponds include 005, 006, 009, 015, 016, <br />016A and 017. All sediment ponds that have been approved as of June 2006 have <br />- - been constructed. Information regarding dtisign of ponds and diversions is provided - <br />in Tab 13 of the permit application. <br />Seneca II-W Findings Document 27 June l2, 2006 <br />Permit Renewal No. 5 <br />
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