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Susan Morrison <br />June 13, 1994 <br />Page 4 <br />B. Upstream Embankment Slope <br />Vegetation again appears to have a higher cover on <br />this slope than the downstream slope and erosion does <br />not appear to be a problem. No cracking was noted on <br />the slope. Only minimal impounding had occurred over <br />the past year as evidenced by the lack of debris or <br />high water lines on the fill slope. The steel stakes <br />set to indicate the 10-year, 24-hour storm water <br />elevation are in place and in good condition. <br />C. Upstream Channel <br />Water does not currently flow through the rock <br />underdrain of the embankment fill. No water was <br />impounded upstream of the embankment. <br />The highest 24-hour precipitation for the 1993 Water <br />Year was 0.58 inches of rain on August 21, 1993. This <br />is lower than the 10-year, 24-hour event of 1.6 <br />inches. A copy of annual precipitation data covering <br />the 1993 Water Year is attached. <br />D. Downstream Embankment Slope <br />Vegetation is sparse on the side slopes due to the <br />coarse and rocky material present in the fill. <br />Erosion does not appear to be a problem due to the <br />relatively short slope and limited area exposed to <br />runoff. No runoff from the haul road ditches occur <br />down the embankment slope. No cracking, bulging, or <br />other signs of stress were noted. <br />III. Conclusion <br />There appears to have been no noticeable change in the <br />embankment structure since the last annual inspection <br />of June 10, 1993. Vegetation is growing on the side <br />slopes. The embankment is stable and the underlying <br />rock fill is functioning as expected. <br />