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HYDRO30083
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Entry Properties
Last modified
8/24/2016 8:48:53 PM
Creation date
11/20/2007 11:54:57 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981013
IBM Index Class Name
Hydrology
Doc Date
3/29/1994
Doc Name
1st Qtr 1994 Inspection
Permit Index Doc Type
SEDIMENT POND INSPECTIONS
Media Type
D
Archive
No
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3. IS the discharge outlet free of debris or other restrictive materials? Yes _ No X . <br />The discharge outlet of the principal spillway was snow covered and not visible at the time of the <br />inspection. <br />4. Is erosion occurring at the discharge outlet? Yes _ No _. If yes, evaluate the severity: Extensive, <br />Moderate, Jttst Starting, None. <br />Any erosion of the discharge outlet was not observed due to snow cover at the time of the inspection (see <br />paragraph 3 above). <br />EMERGENCY SPILLWAY <br />1. Is the overall emergency spillway.system of currently capable of passing the design storm discharge? Yes <br />No <br />The capacity of the spillway was not checked. The spillway dimensions were checked. The spillway is built <br />to as-built Figure 1, Exhibit 16, and is in good condition. <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 at 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 _. If yes, <br />explain. <br />Water in the pond obscured any sediment that may have been in the pond. The pond Ivner was recently <br />installed; therefore, a significan[ accumulation of sediment is unlikely. A cursory review of Permit <br />documentation available found no design sedimentation volume Cor the current pond. <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 (upslope or downslope). <br />2. There were no indications of rodent activity on the embankment (upslope or downslope). There was a <br />venial hole, approximately 1~/s feet deep, just below the crest of [he embankment on the: east downslope, <br />northeast corner. This hole appeared to be an unused post hole. <br />3. Some measurements were taken with an Abney Level, stadia readings, tapes and paces. The design <br />outslopes and inslopes are 3 horizontal to 1 vertical (18.4°). Measured outslopes ranged from 18° to 35° <br />(at the northeast corner). The design width of crest is unspecified on Figure 1. The minimum width <br />measured was 8 feet (on the east bank). <br />4. Threat to human life or property: slight to none except to the lined structure itself. Maximum capacity <br />of the pond is approximately 11 acre feet. The region below the structure is a floodpla~in terrace of the <br />Purgatoire River with no development except pasture fences. <br />5. Potential Harm to land, air, and water resources: Water quality of the Purgatoire River could be affected <br />by release of approximately 11 acre feet of mine water discharge for a short period of time should the =. <br />pond embankment fail. <br />Golden Eagle Mine Water Discharge Pond 005, 29 Mar 94, Page 2 0l3 <br />~v <br />
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