Accession Number:

ADA106215

Title:

National Dam Safety Program. Sky Ranch Lake Dam (MO 31293), Missouri - Kansas City Basin, Warren County, Missouri. Phase I Inspection Report.

Descriptive Note:

Final rept.,

Corporate Author:

HORNER AND SHIFRIN INC ST LOUIS MO

Report Date:

1980-09-01

Pagination or Media Count:

60.0

Abstract:

Based on the visual inspection and the results of these hydrologichydraulic investigations, the present general condition of the dam is considered to be somewhat less than satisfactory. Deficiencies were notices during the inspection and are considered to have an adverse effect on the overall safety and future operation of the dam. An eroded section of embankment up to 6 feet in depth and approximately 8 feet wide and 30 feet long, that appears to be due to spillway releases impinging upon the dam, exists at the junction of the downstream toe of the dam and the spillway outlet channel. Loss of embankment material by erosion can be detrimental to the structural stability of the dam. The upstream face of the dam has only a grass cover to prevent erosion by wave action or fluctuations of the lake surface level. A grass cover is not considered adequate protection to prevent erosion of the embankment by wave action or fluctuations of the lake surface. Several small tress along with some brushy undergrowth that could conceal animal burrows exists at the waterline along the upstream face of the dam. According to survey data obtained during the inspection, the crest elevation of the emergency spillway was found to be approximately 0.1 foot lower than the low area in the top of the dam between stations 100 and 150. As a result of this suspected settlement, the effectiveness of the emergency spillway is virtually negated.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE