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4. Is erosion occurring at the discharge outlet? Yes _ No X . if yes, evaluate the severity: Extensive, <br />Moderate, Just Starting, None. <br />EMERGENCY SPILLWAY <br />1. Is the overall emergency spillway system of currently capable of passing the design storrn discharge? Yes <br />No <br />The capacity of the spillway was not checked. <br />2. Does it appear as if the emergency spillway has discharged water since the last inspection? Yes _ No <br />X. <br />3. Is erosion occurring a[ any section of the emergency spillway? Yes _ No X . Describe extent and <br />location: None. <br />SEDIMENT STORAGE CAPACITY <br />1. Has the design sediment storage capacity of the reservoir been surpassed? Yes _ No X . Lf yes, <br />explain. <br />Pond design parameters are presented in the following table. A sediment delta was ob:;erved forming at <br />the inlet to the pond. The apex of the delta was estimated to be at an elevation of 7113, the fan extending <br />out into the pond for 30 feet at an elevation of 7111 (pebble soundings). The volume of the delta of <br />sediment would be approximately 0.04 acre feet or 2% of sediment storage. <br />PARAMETER VOLUME (acre feet) ELEVATION <br />Primary spillway 8.98 7,115.0 <br />Water level in pond 7,112 <br />100% sediments[orage 2.33 7,111.1 <br />60% sediment storage 1.49 7,110.5 <br />Bottom of pond 7,109.5 <br />OTHER OBSERVATIONS: <br />1. Indications of potential failure or instability: None. There were no indications of slumps, slides, cracks, <br />or differential settlement on the embankment (upstream slope or downstream slope). <br />2. There were no indications of rodent activity on the embankment (upstream slope or downstream slope). <br />3. Some measurements were taken with an Abney Level, stadia readings, tapes and paces. A comparison of <br />design parameters to field measurements are presented in the following table: <br />PARAMETER DESIGN FIELD MEASUREMENT <br />Upstream slope 2 horizontal to 1 vertical or <br />26.6° 21° to 30° <br />Crest width 12 feet Minimum width <.ection: 6 [eet <br />Golden Eagle Mine Sedimentation Pond 003, 29 March 94, Page 2 0l 3 Pages <br />