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National Dam Safety Program. Lac-Piete Dam (MO 10886), Missouri - Kansas City Basin, Callaway County, Missouri. Phase I Inspection Report
The dam is an earth fill about 500 feet long and 22 feet high. The principal spillway consists of an 18 inch diameter ungated corrugated metal pipe passing through the embankment on the right (east) end of the dam. Our inspection and evaluation indicates that in consideration of the small volume of water impounded and the three houses downstream, 50% of the Probable Maximum Flood is the appropriate design flood. The spillway of this dam does not meet this criteria. The spillway will pass the 100-year flood (flood having a one percent chance of being exceeded in any year) as well as 23% of the Probable Maximum Flood (PMF) without overtopping the dam. Deficiencies visually observed by the inspection team were willows nearly covering the upstream slope, wave erosion of the upstream slope above the water line at the left end of the dam, downstream slope badly overgrown with shrubs and trees, significant seepage along the downstream toe of the dam (Sta. 1+00 to Sta. 4+50), erosion around the outlet end of the spillway pipe, willows growing around the inlet to the spillway and heavy growth of trees in the channel downstream of the dam.
National Dam Safety Program. Lac-Piete Dam (MO 10886), Missouri - Kansas City Basin, Callaway County, Missouri. Phase I Inspection Report
The dam is an earth fill about 500 feet long and 22 feet high. The principal spillway consists of an 18 inch diameter ungated corrugated metal pipe passing through the embankment on the right (east) end of the dam. Our inspection and evaluation indicates that in consideration of the small volume of water impounded and the three houses downstream, 50% of the Probable Maximum Flood is the appropriate design flood. The spillway of this dam does not meet this criteria. The spillway will pass the 100-year flood (flood having a one percent chance of being exceeded in any year) as well as 23% of the Probable Maximum Flood (PMF) without overtopping the dam. Deficiencies visually observed by the inspection team were willows nearly covering the upstream slope, wave erosion of the upstream slope above the water line at the left end of the dam, downstream slope badly overgrown with shrubs and trees, significant seepage along the downstream toe of the dam (Sta. 1+00 to Sta. 4+50), erosion around the outlet end of the spillway pipe, willows growing around the inlet to the spillway and heavy growth of trees in the channel downstream of the dam.
National Dam Safety Program. Lac-Piete Dam (MO 10886), Missouri - Kansas City Basin, Callaway County, Missouri. Phase I Inspection Report
H. P. Hoskins (author)
1978
44 pages
Report
No indication
English