HYDRO23834

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 10/19/1999
• Doc Name: QUARTERLY POND INSPECTION REPORT
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

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POWDERHORN COAL COMPANY
C-81-041
OPERATIONAL STATUS AT TIME OF INSPECTION
DESIGN AND ACTUAL DEPTH
FROM SPILLWAY INVERT
DESIGN DEPTH
DESIGN MAX. WATER DEPTH
APPROXIMATE WATER LEVEL
DESIGN MAX. SED. DEPTH
SEDIMENT LEVEL
OUTFLOW (cfs )
FEATURES
EROSIONAL
RILLS 8 GULLIES ON EMB
INADEQUATE VEGETATION
OUTLET CHANNEL EROSION
BURROWS
OTHER
DIFFERENTIAL SETTLING
CRACKS OR SLIDES
SEEPAGE
OTHER
DEFECTIVE SPILLWAYS
DEWATERING DEVICE CLOGGED
FAULTY GATES, BAFFLES
OTHER
ADDITIONAL COMMENTS
MAINTENANCE REQUIRED
POND INSPECTION REPORT
February 14, 1999 & March 27, 1999
ALL DEPTHS MEASURED FROM EMERGENCY SPILLWAY INVERT SAE SAE
POND 1- 2 POND 4 POND 5 POND 8 POND 7 POND 8 POND 9 POND 10 POND 11 POND 12 N Decl. N DeG.
UTL N YARD N SHOP CRDA 1 N DECL PLANT RSRDA CRDA - 2 CBA -2 Mine Dis. E. Sump W. Sump
0.8 1.05 8.00 2.7 12.00 9.00 9.00 8.8 5.00 Na n/a
n/a n/a n/a Na n/a 5.5 n!a n/a n/a Na n/a n/a
Puddles Puddles >8.0 DRY DRY > 7.0 8.0 DRY DRY DRY DRY
0.8 1.00 2.80 2.4 2.3 5.6 4.7 3.13 4.4 n/a n/a n/a
4.4/4.2/8.8 2.9!3.1 > 5.0 5.9!7.3/5. 4.75 6.2 (1) 8.88 8.8/8.5 8.3f1.2 n/a n/a n/a
0 0 0 0 0 0 0 0 0 0 0 0
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO Note 3 NO NO NO NO NO NO Note 3 NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NO NO NO NO NO NO NO NO NO NO NO NO
NONE NONE NONE NONE NONE Note4 NONE NONE NONE NONE NONE NONE
NONE NONE NONE NONE NONE Notes NONE NONE NONE NONE NONE NONE
Note 1 - Delta of sediment near inlet at 8.2 feet water level in pond on south end is about 8 "deeper.
Note 3 - Area seeded and mulched in December of 1998.
Note 4 - Monitor depth weekly ~
Note 5 - Keep water pumped to dry sediment then clean sediment from pond. INSPECTO ~>~