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~~ <br />8. Miscellaneous - Vegetation of the area disturbed by <br />reconstruction of the emergency spillway several years <br />ago is showing improvement from 1994 observations. <br />Yampa River Sedimentation Pond <br />1. Structural Weakness - None. <br />2. Erosion and Vegetation - The previously reported rill <br />near the western input structure is slightly larger than <br />during the first quarter inspection. The rill poses no <br />problem to adequate functioning of the pond. No other <br />rill or gully development was observed. Vegetation <br />remains sparse in the pond area due to cattle traffic and <br />grazing. <br />3. Hazardous and Potentially Hazardous Conditions - None. <br />4. Sediment Level - The water level is at the base of the <br />primary dewatering device, and the deepest water measure- <br />ment in the pond is 4.6 feet. <br />5. Required Maintenance - None. <br />6. Discharge Structures <br />Primary - The dewatering device is clear of debris and <br />carries a minor flow of water. Riprap at the outflow <br />is in acceptable condition. As usual, the measuring <br />board has been knocked down by cattle. <br />Emergency Saillway - The spillway is in good condition <br />and shows no evidence of water flow since the first <br />quarter inspection. Actually, the spillway does not <br />appear to have carried any water flow since it's <br />installation in 1992. <br />7. Input Strctures - The western input culvert carries a <br />minor water flow that collects in the haul road barrow <br />pit. A small alluvial fan is developing where the pipe <br />discharges into the pond. clastic debris partially block- <br />ing the culvert input has been removed. The eastern <br />culvert transports water that appears to originate from a <br />spring near the alluvial valley floor-hillside interface. <br />The volume of flow is insignificant. The pipe is free and <br />clear of debris. <br />Northwest Sediment Traa <br />Construction to convert the Northwest Sediment Trap into a <br />water control/diversion structure was initiated on 31May95. <br />By noon on 1Jur~e95 the conversion was approximately 60 per- <br />cent complete, and subsequent telephone reports indicate the <br />