A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
National Dam Safety Program. Lake Montowese Dam (M0 30151), Mississippi - Kaskaskia - St. Louis Basin, Jefferson County, Missouri. Phase I Inspection Report
Based on a visual inspection, the present general physical 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 few small trees exist on the upstream and downstream slopes of the dam. The downstream slope also has a dense cover of vegetation and brush in most areas that may contain animal burrows. A dense growth of trees and brush obstructs the spillway outlet channel downstream of the roadway culvert crossing. This growth will restrict channel flow and could require spillway discharge to overflow the channel and flood the area adjacent to the downstream toe of slope. Flooding of the area adjacent to the dam may impair the stability of the dam. An 8-inch diameter concrete pipe, located approximately 340 feet south of the spillway, passes through the dam about 2 feet below the crest. This conduit will provide an outlet for lake surcharge at an elevation below the dam crest that could result in erosion of the downstream slope of the dam. There did not appear to be a means of isolating the sanitary sewer passing through the dam should failure of the sewer line within the lake occur. Loss of water from the lake through the sewer pipe could surcharge the system to the point where it floods the area downstream of the dam. Operation of the lake can also be affected depending upon the quantity of lake water entering the sewer should failure occur.
National Dam Safety Program. Lake Montowese Dam (M0 30151), Mississippi - Kaskaskia - St. Louis Basin, Jefferson County, Missouri. Phase I Inspection Report
Based on a visual inspection, the present general physical 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 few small trees exist on the upstream and downstream slopes of the dam. The downstream slope also has a dense cover of vegetation and brush in most areas that may contain animal burrows. A dense growth of trees and brush obstructs the spillway outlet channel downstream of the roadway culvert crossing. This growth will restrict channel flow and could require spillway discharge to overflow the channel and flood the area adjacent to the downstream toe of slope. Flooding of the area adjacent to the dam may impair the stability of the dam. An 8-inch diameter concrete pipe, located approximately 340 feet south of the spillway, passes through the dam about 2 feet below the crest. This conduit will provide an outlet for lake surcharge at an elevation below the dam crest that could result in erosion of the downstream slope of the dam. There did not appear to be a means of isolating the sanitary sewer passing through the dam should failure of the sewer line within the lake occur. Loss of water from the lake through the sewer pipe could surcharge the system to the point where it floods the area downstream of the dam. Operation of the lake can also be affected depending upon the quantity of lake water entering the sewer should failure occur.
National Dam Safety Program. Lake Montowese Dam (M0 30151), Mississippi - Kaskaskia - St. Louis Basin, Jefferson County, Missouri. Phase I Inspection Report
1978
61 pages
Report
No indication
English