National Dam Safety Program. Big Four Mine Dam (MO 30729), Mississippi - Kaskaskia - St. Louis Basin, Washington County, Missouri. Phase I Inspection Report.
Abstract
The Big Four Mine Dam (Mononame 562), Missouri Inventory Number 30729 was inspected. This dam is classified as intermediate due to its 71 ft height and live storage of 1980 ac-ft. The St Louis District, Corps of Engineers, has classified this dam as a high hazard dam; we concur with this classification. The potential damage zone, extends approximately 22 mi downstream. The community of Fletcher and several other occupied structures are located within the estimated damage zone. The inspection and evaluation indicate that the dam is in poor condition. Specific deficiencies that were noted are very steep downstream slope, high potential for erosion of downstream toe by spillway outflow, high erodibility of the embankment materials and lack of maintenance and periodic inspections. Also deemed as a deficiency is the lack of any stability or seepage analyses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA105296
Entities
People
- Leonard M. Krazynski
- Richard G. Berggreen