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Ms. Sandra L. Emrich July 23, 1989 Page 2 E. July 18, 1983: The annual embankment inspection was con- ducted. Weather conditions were favorable, skies partly cloudy, temperature about 85°F. The mine area was dry and mine personnel reported that no measureable precipitation had fallen in about one week. F. July 6, 1984: The annual embankment inspection was con- ducted. Weather conditions were favorable with sunny skies and temperature of 80°F. The mine area was dry and no measureable precipitation had fallen within one week. SI. Inspection A. Crest of Embankment The crest of the embankment is a 60-foot wide roadway used for coal haulage. No signs of stress (cracks) were noted upon inspection of the crest. The roadway and side ditches are well maintained. Safety berms are in place. The side ditches are clean and traverse the entire length of the embankment with no openings for discharge onto embankment slopes. There was no flow in the side ditches on the date of the inspection. 8. Upstream Embankment Slope Vegetation is establishing sloroly due to the nature of the embankment material and grade and orientation of the side slopes. Erosion does not appear to be a problem due to the limited runoff across the slope. No cracking or bulging was noted on the slope. The slope r.•as inspected for a debris line that would indicate impounding of water. None was found, however water has been impounded during the past year. The steel stakes set to indicate the 10-tear, 24-hour storm water elevation are in place and in good condition. C. Upstr'o. nrr Chnnnrl The upstream ch:uvr~•1 eras inspected [o a point. appru.ei ma teiu Z00 icet upstr~~anr ni the lowest elevation. L'lor.• rlo~~s currentlu exist tiirouu_h thr rock core of the embankment fill. Debris lines along the Nrrth slope of the upstream channel indicate va ryinn stayer of ir,~L,o undmant. The impounded water reached .v mar.imum elevation of 0931.5 feet above sea level, 9.6 feat below the leer'1 established .`or the 10-year, 2d-hour storm. Throughout the pc ri orl or impoundment, flow con tinucd through the rock fill h,, s~~. The hi yhest 24-hour precipitation for 1983 was 0.80 inches on November 7, 1983. This compa z'es with the predicted 7U-year, ?4-ho w' event of 1.6 inches. A copy of the anr. udl precipitation da to mveriny 1983 is attached.