National Dam Safety Program. MO No Name 819 Dam (MO 30211), Mississippi - Kaskaskia - St. Louis Basin, Cape Girardeau County, Missouri. Phase I Inspection Report.
ARMY ENGINEER DISTRICT MEMPHIS TN
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This dam is classified as an intermediate size dam with a high downstream hazard potential. Failure would threaten the life and property of five families downstream of the dam and cause appreciable damage to Highway J bridge located approximately 0.3 mile downstream. The inspection and evaluation indicate that the spillway does not meet the criteria set forth in the guidelines for a dam having the above mentioned size classification and hazard. The emergency spillway will only pass 30 percent of the PMF before the dam embankment is overtopped. Because the spillway will not pass 12 of the PMF without overtopping but will pass the 10-year frequency flood, the dam is classified as unsafe non-emergency. Other deficiencies visually observed by the inspection team were trees growing on the upstream slope erosion gulleys in both abutments and erosion at the outlet of the emergency spillway due to the discharge from the emergency spillway being directed onto the downstream slope of the dam. Another deficiency found was the lack of seepage and stability analysis records.
- Hydrology, Limnology and Potamology
- Civil Engineering