National Dam Safety Program. Conservation Club Lake Dam (MO 30414), Mississippi - Kaskaskia - St. Louis Basin, Jefferson County, Missouri. Phase I Inspection Report.
Abstract
Based on the visual inspection, the present general condition of the dam is considered to be satisfactory; however, the following deficiencies were noticed during the inspection and are considered to have an adverse effect on the overall safety and future operation of the dam: A dense cover of vegetation (brush, trees, and tall grass) that may conceal animal burrows, exists on the downstream face of the dam. A heavy growth of brush and small trees exist along the concrete line invert section of the discharge channel. This growth will restrict channel flow and reduce the discharge capacity of the spillway that could result in flooding of the dam channel and possible damage to the downstream face of the dam. The downstream end of the concrete lined spillway channel invert is in a deteriorated condition, as is evidenced by extensive cracking and settlement of the concrete pavement, as well as severe erosion of the pavement subgrade. Continued erosion of the spillway channel could affect the stability of the channel banks. Underseepage, as evidenced by wet, soft ground and ponded water, was observed in the vicinity of the downstream toe of slope junction with the right abutment. Uncontrolled seepage can develop into a piping condition that could lead to failure of the dam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA104713