National Dam Safety Program. Land of Lakes Dam (MO 30451), Mississippi - Kaskaskia - St. Louis Basin, Jefferson County, Missouri. Phase I Inspection Report.
Abstract
The purpose of the inspection was to make an assessment of the general condition of the dam with respect to safety, based upon available data and visual inspection, in order to determine if the dam poses hazards to human life or property. The inspection and evaluation indicates that the dam is deficient in that the spillways do not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. Considering the volume of water impounded, the small floodplain downstream and the 25 buildings downstream, the Probable Maximum Flood (PMF) is the appropriate spillway design flood. The probable maximum flood is defined as the flood discharge that may be expected from the most severe combination of critical meteorological and hydrologic conditions reasonably possible in the region. The dam will begin to be overtopped by a flood having a discharge (peak and volume) equal to 45% of the PMF. The spillways will pass 1% chance flood (100-year flood) without overtopping which is a flood that has a 1% chance of being exceeded in any given year. Other deficiencies noted by the inspection team were underseepage or seepage at the base of the dam embankment and heavy growth of trees and shrubs on the downstream slope of the dam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1978
- Accession Number
- ADA105145
Entities
People
- Henry M. Reitz
- John J. Bailey Jr