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INSPEC20338
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INSPEC20338
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Last modified
8/24/2016 9:21:08 PM
Creation date
11/18/2007 9:34:36 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981015
IBM Index Class Name
Inspection
Doc Name
INSPECTION REPORT
Inspection Date
8/6/1997
Media Type
D
Archive
No
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Ill. COMMENTS -COMPLIANCE <br />Below are comments on the inspection. The comments include discussion of observations made <br />during the inspection. Comments also describe any enforcement actions taken during the <br />inspection and the facts or evidence supporting the enforcement action. <br />This was a complete quarterly inspection of the reclaimed bond <br />forfeiture site. Weather was partly cloudy, warm and humid. I <br />arrived at the mine site at approximately 2:30 p.m. <br />A flash flood type storm event had occurred at the mine site the ~- <br />night of August 5. The rainfall amount, duration, and intensity is <br />not known, however an intense thunder storm occurred in the city of <br />Grand Junction around midnight, on the night of August 5 and early <br />morning of August 6. The Grand Junction Daily Sentinel reported in <br />its August 6 edition that .92 inches of rain fell between 12:10 and <br />12:30, with an additional .30 inch about an hour later. The paper <br />quoted the Mesa County public works director as reporting minor <br />flooding throughout the Grand Junction area, and a National Weather <br />Service meteorologist as explaining that "the storm cell came <br />across Douglas Pass Tuesday evening, causing a mud slide and large <br />boulder to threaten Colorado Highway 139 before building over the <br />Grand Valley. Most of the moisture dropped in the valley before it <br />dissipated toward Delta." <br />As indicated in the newspaper account, minor flooding appeared to <br />be widespread in the Grand Junction/ Fruita vicinity. All of the <br />drainage arroyos between the highline canal north of Fruita and the <br />mine site were either flowing or showed evidence of very recent <br />flow. Approximately 4 miles south of the mine, flooding from a <br />drainage apparently originating in the Bookcliffs several mile$ <br />east of the mine had deposited mud several inches deep along a 100 <br />yard segment of the road on either side of the culverted drainage. <br />At the minesite, the storm runoff and associated mud and boulders <br />originating from the steep slopes above the head of the canyon in <br />which the mine is located had completely overwhelmed the 100 year <br />diversion ditch above the Fruita #1 Mine Bench, resulting in severe <br />erosion of the #1 Mine outslope, road and pond embankments, and <br />roadside ditches. Debris ranging from mud to 8' diameter boulders <br />had been deposited in areas of lower gradient throughout the mine <br />site. Water level in the sediment pond was 4 feet below the top of <br />the riser, and the pond had not discharged. The pond embankment <br />had sustained erosion from water which had run down the road and <br />spilled over the embankment, but the extent of damage did not <br />appear to be such that the integrity of the structure was <br />threatened. <br />There was minor sediment deposition and minor erosion on rangeland <br />south of the minesite resulting from drainage which came off the <br />access road at the permit boundary, but the flow had entered a <br />
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