HYDRO29548

• Permit No: C1980006
• IBM Index Class Name: Hydrology
• Doc Date: 5/7/1981
• Doc Name: CERTIFICATION OF SEDIMENT PONDS FOR KERR COAL CO
• Permit Index Doc Type: Prof Pond Certifications
• Media Type: D
• Archive: No

INTRODUCTION
ACZ INC. was contracted by Kerr Coal Company during October, 1980
to supervise construction, inspect and certify Sediment Ponds "A",
"B", "C", "D" and "E" at Kerr Coal Company's coal mine near Walden,
Colorado. The methodology for completion of this contract consisted
of the following items:
• Review of the approved design
• Weekly on-site inspections
• Collection of soil samples for laboratory analysis
• Laboratory analysis
• Review and comparison of as built dimensions with
design dimensions
• Observation of construction methods
- Type of fill material
- Compaction method
- Placement of material
• Verification of constructed dimensions
• Certification of the sediment ponds in accordance
with Colorado Regulations, Section 4.05.6 (7) for
coal mining
Coordination of these functions were completed with Dave Gossett and
George Patterson of Kerr Coal Company to ensure that construction of
the ponds was completed according to the approved design and in a
cost efficient manner. A review of the inspection and subsequent
certification follows in this report.
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