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GENERAL46113
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Last modified
8/24/2016 8:17:07 PM
Creation date
11/23/2007 2:22:01 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982057
IBM Index Class Name
General Documents
Doc Date
7/3/2006
Doc Name
Proposed Decision & Findings of Compliance for RN4
Permit Index Doc Type
Findings
Media Type
D
Archive
No
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of areas adjacent to the channel Following construction, the channel will be left <br />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 [he permit by PR-5. The most recent design and certification <br />information was sufficient to resolve permit stipulations 37 and 38. <br />Several of the stock ponds have been proposed as permanent impoundments, and <br />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 stock 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 <br />remedial construction performed to satisfy the appropriate sections of the <br />regulations. Prior to submittal of a bond release request, SCC will submit a <br />complete technical revision demonstrating that each permanent impoundment <br />meets the requirements of 4.05.9(13). <br />C. Sedimentation Ponds <br />Seneca Coa] 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 design of ponds and diversions is provided <br />in Tab 13 of the permit application. <br />Seneca II-W Findings Document 27 July 3, 2006 <br />Permit Renewal No. 5 <br />
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