Laserfiche WebLink
. ~; <br />5. Required Maintenance - As set forth in paragraph 3 above. <br />6. Discharee Structures <br />Primary - Waterflow out of the primary dewatering <br />device is approximately two inches in depth and flows <br />onto riprap that is in good condition from the pipe <br />to the permit boundary. The riser is clear of debris <br />and some leakage occurs around the low level outlet <br />gate (knife valve) at the riser base. Water is enter- <br />ing the upstream end of the 20" pipe from an unknown <br />source. <br />Emereency Saillway - The spillway is in good condition <br />and there is no evidence of water flow in the spillway <br />since the first quarter inspection. <br />7. Inaut Structures - The is no water flow in the lateral <br />that enters the pond from the south, and as previously <br />discussed, clastic debris has accumulated at the lateral <br />terminus. The riprapped ditch that carries water from <br />Sedimentation Pond No.2 to this pond is in good condition <br />and the recently emplaced riprap in the lower one-third <br />of the ditch seems to effectively control erosion. <br />8. Miscellaneous - The rill discussed in paragraph 2 above <br />should be repaired. However, repair of the rill will be <br />useless in the long term unless the lateral at the top of <br />the rill is repaired or eliminated. <br />Uaaer Sedimentation Pond No.2 <br />1. Structural Weakness - None. <br />2. Erosion and Veeetation - There are no rills or gullies on <br />the embankment slopes. Three minor rills cut the north <br />pond slope, and one minor rill is located on the south- <br />east pond slope. Vegetative growth on the embankment and <br />around the pond is excellent, which probably relates to <br />the unusually wet spring this year. <br />3. Hazardous and Potentially Hazardous Conditions - None <br />4. Sediment Level - Water level in the pond is 4.5 feet <br />below the top of the riser on the primary dewatering <br />device. Water depth in the pond measures 5.5 feet <br />throughout most of tt~e deeper part of the pond. One <br />measurement was 5.7 feet. These measurements probably <br />include 2 to 3 inches of mud. Sediment level is 10.2 <br />feet below the riser top. <br />5. Required Maintenance - None. <br />