Accession Number:

ADA106468

Title:

National Dam Safety Program. Indian Creek Mine Dams (MO 30717 and 31036), Mississippi - Kaskaskia - St. Louis Basin, Washington County, Missouri. Phase I Inspection Report.

Descriptive Note:

Final rept.,

Corporate Author:

INTERNATIONAL ENGINEERING CO INC SAN FRANCISCO CA

Report Date:

1980-02-01

Pagination or Media Count:

140.0

Abstract:

The Indian Creek Mine Dams were inspected to assess the general condition of the dams with respect to safety. The assessments were based upon an evaluation of the available data, visual inspections, and an evaluation of the hydrology and hydraulics of the sites to determine if the dams pose hazards to human life or property. The purpose of the dams is to impound lead tailings and water. The results of the inspection and evaluation of the Lower Dam 30717 indicate that the combined capacity of the spillway and the 12-inch diameter outlet pipe, and the storage capacity of the dam meet the criteria given in the Guidelines for a dam of the size and hazard potential of the Indian Creek Mine Lower Dam. As an intermediate size dam with a high hazard potential, the Guidelines specify that the discharge capacity andor storage capacity should be capable of safely handling the Probable Maximum Flood PMF without overtopping the crest. The PMF is the flood that may be expected from the most severe combination of critical meteorologic and hydrologic conditions that are reasonably possible in the region. It is noted that although the hydrologic analysis shows the Lower Dam capable of passing the PMF without overtopping, the dam could become unstable if a sufficient depth of water is impounded to accelerate piping, and high velocities at the spillway section would cause significant erosion of the spillway channel.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE