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Impoundment 001, October 29, 1992 <br />Other Yes Erosion curs into the upstream <br /> slope of the dam (see Photo- <br /> graph No. 1 and the discussion <br /> of erosional features above). <br /> Has not caused a crack, slump <br /> or slide; and has not reduced the <br /> width of the crest of the dam <br /> Unabated advance of the feature <br /> could eventually reduce the <br /> effective widtfi of the nest of <br /> the dam. <br />Appurtenant Structures <br />Detective Spillways No <br />Dewatering Device Clogged Yes A plastic sheet in the bottom of <br /> the gate riser could block or <br /> reduce flows in the principal <br /> spillway. Vegetation overgrowth <br /> partially blocks the outfall of the <br /> principal spillway. <br />Faulty Gates, Baf[les, Pumps No <br />Other No <br /> <br />Additional Comments: <br />Some rills and gullies on pond basin slopes were noticed, most in the process of being stabilized by <br />vegetation. There was no significant erosion or sediment deposition in the pond from these features. <br />Maintenance Required: <br />Uncover burrows and re-compact in-situ backfill to dam construction specifications to maintain the <br />integrity of the dam. <br />Establish vegetation cover of native perennial grasses or provide alternative erosion protection on the <br />upstream slope of dam at the high-water wave action level and areaz of sparse cover to arrest erosion <br />and to inhibit rodent activity. <br />Clear principal spillway of plastic sheeting and the outfall of excessive vegetation growth to avoid <br />restrictions of flows. <br />r <br /> <br />T~ ~ ,/4 ~. <br /> ~/ <br /> <br /> <br />-3- <br />