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Hydrologic Balance <br />The sediment pond at the site was found dry. This pond is approved to remain as a permanent <br />impoundment. The embankment appeared stable and the trickle tube projecting through the <br />embankment appeared normal. The emergency spillway is protected with riprap, although the <br />pond has never shown evidence of discharge through this spillway. A slight amount of erosion <br />is present at the pond inlet but existing rock and vegetation appear to have stabilized further <br />down-cutting. <br />y ~ .` r <br />~' O <br />f N'r. ~.r. {r.. t~~ <br />.. ~ '~' 1: <br />Pond inlet. Rimrock Mine. June <br />Backfilling and Grading <br />Two small areas were excluded from a previous Phase I bond release at this site. One was a <br />small subsidence crater that the permit requires be repaired by the permittee if it is within 250 <br />feet of the pit. Records reviewed did not specify the location of this feature other than being <br />near Engleville Gulch. No evidence of a subsidence crater could be located during the <br />inspection and it is likely that this feature was reclaimed shortly after it was identified during the <br />Phase t inspection in 1993. The other area excluded from the previous Phase I finding was the <br />oil tank containment area. This area has been regraded. topsoiled, and reseeded. The area is <br />nearly indistinguishable from the surrounding area. <br />