Download or read book National Dam Safety Program Four Ridge Dam MO 30446 MIssissippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Ken Alexander and published by . This book was released on 1978 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Dam Safety Program Fon Du Lac MO 10699 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Henry M. Reitz and published by . This book was released on 1978 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fon-du-lac Subdivision Dam was inspected by an interdisciplinary team of engineers. The purpose of the inspection was to make an assessment of the general condition of the dam with respect to safety, based upon available data and visual inspection, in order to determine if the dam poses hazards to human life or property. Failure would threaten the life and property of ten families and cause appreciable damage to two county roads. Our inspection and evaluation indicates the dam is deficient in that the spillway is inadequate. The guidelines for a dam having the above size and hazard potential require that the spillway be capable of passing a one-half PMF (Probable Maximum Flood). The Probable Maximum Flood is defined as the flood discharge that may be expected from the most severe combination of critical meteorologic and hydrologic conditions reasonably possible in the region. Considering the small volume of water impounded, the large floodplain downstream and the three groups of farm buildings downstream, one-half PMF is the appropriate spillway design flood. A 20% PMF will begin to overtop the dam. The lake and spillway are adequate to contain a 1% annual probability flood (100-year flood) without overtopping the dam.
Download or read book National Dam Safety Program Dresser Number 10 Dam MO 31153 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Kenneth B. King and published by . This book was released on 1979 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
Download or read book National Dam Safety Program Glen Leonard Dam MO 30428 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by ARMY ENGINEER DISTRICT ST LOUIS MO. and published by . This book was released on 1978 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is in the high hazard potential classification, which means that loss of life and appreciable property loss could occur in the event of failure of the dam. The downstream damage zone is approximately 3 miles long. Over 10 existing homes plus more than 10 additional planned home sites are located within one mile downstream of the dam. These homes and four improved road crossings would be subjected to flooding with possible damage and/or destruction and possible loss of life if the dam should suddenly fail. The dam is in the small size classification because it is less than 40 feet high and impounds less than 1000 acre-feet of water. For its size and hazard category, this dam is required by the guidelines to pass one-half PMF to the PMF. However, considering the high hazard potential to life (10 existing homes and 10 planned homes) and property downstream of the dam, the PMF is considered the appropriate spillway design flood. The PMF is defined as resulting from the most severe combination of critical meteorologic and hydrologic conditions that are reasonably possible in the region.
Download or read book National Dam Safety Program Dresser Number 4 Dam MO 30474 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Kenneth B. King and published by . This book was released on 1979 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of Dresser No. 4 Dam is to impound tailings from a barite separation and beneficiation operation. The dam completely encircles the impoundment except for a 300-foot wide breach at the north (up-stream) end where the structure failed in 1975. The dam cannot retain water in its present state because of this breach in the dam. This dam is classified as large. The U.S. Corps of Engineers has classified it as having a high downstream hazard potential to indicate that failure of this dam could threaten life and property. The damage zone, estimated by the U.S. Corps of Engineers, extends about 6 miles downstream of the dam. Since the embankment cannot retain water, the overtopping potential of the embankment was not analyzed. Instead, studies were made to estimate the amount of flow that could occur in the diversion ditch (located to the west and south of the impoundment) under different flood conditions. It was calculated that the diversion ditch could pass a 100-year flood probably without significant erosion of the ditch or adjacent embankment toe. However, it was estimated that the ditch cannot pass 50 percent of the Probable Maximum Flood without significant erosion of the ditch and adjacent embankment materials.
Download or read book National Dam Safety Program Lake Virginia Dam MO 30425 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Henry M. Reitz and published by . This book was released on 1978 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. This dam has been classified as unsafe, non-emergency by the St. Louis District as a result of the application of the following criteria: (1) Spillway will not pass 15 percent of the Probable Maximum Flood; (2) Overtopping could result in dam failure; and (3) DAm failure significantly increases the hazard to loss of life downstream.
Download or read book National Dam Safety Program Pine Lake Dam MO 30447 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Albert B Becker (Jr) and published by . This book was released on 1978 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Certain deficiencies were noticed during the visual inspection and are considered to have an adverse effect on the overall safety and future operation of the dam and spillway. The upstream slope of the dam is irregular (maximum slope ratio is approximately 1v on 1.3h) beginning at a level about 12 feet below the top of the dam. Excessive irregularities of the face of the dam are indications of instability and/or erosion, both of which are considered detrimental to the safety of the dam. A substantial cover of small trees and brush that may conceal animal burrows exists on the upstream and downstream slopes of the dam. The tree roots and animal burrows can provide a pathway for lake seepage that may develop into a piping condition. The upstream slope has a grass cover to protect it from erosion by wave action. Grass cover is not considered adequate to prevent erosion by wave action for a fluctuating lake level. Loss of material can result in instability and settlement of the dam crest. A dense growth of brush and small trees obstructs the spillway crest and outlet channel.
Download or read book National Dam Safety Program Sevan Dam MO 30453 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by PRC CONSOER TOWNSEND INC ST LOUIS MO. and published by . This book was released on 1979 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. The St. Louis District has classified this dam as unsafe because of a large seep on the downstream embankment slope near the left abutment contact, and a seriously inadequate spillway that will pass only 32 percent of the Probable Maximum Flood.
Download or read book National Dam Safety Program Francois Lake Dam MO 31389 Upper Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Ralph E. Sauthoff and published by . This book was released on 1981 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dam has been classified as unsafe, non-emergency by the St. Louis District as a result of the application of the following criteria: Spillways will not pass 50 percent of the Probable Maximum Flood without overtopping the dam; Overtopping of the dam could result in failure of the dam; and Dam failure significantly increases the hazard to loss of life downstream.
Download or read book National Dam Safety Program Williams Dam MO 30384 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Henry M. Reitz and published by . This book was released on 1978 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Williams dam was inspected by an interdisciplinary team of engineers. The purpose of the inspection was to make an assessment of the general condition of the dam with respect to safety, based upon available data and visual inspection, in order to determine if the dam poses hazards to human life or property. Failure would threaten the life and property of five families and cause appreciable damage to one railroad bridge and one highway crossing. Our inspection and evaluation indicates that the dam is deficient in that the spillways do not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. Considering the small volume of water impounded, the large floodplain downstream and the five buildings downstream, one-half Probable Maximum Flood (PMF) is the appropriate spillway design flood. The probable maximum flood is defined as the flood discharge that may be expected from the most severe combination of critical meteorological and hydrologic conditions that are reasonably possible in the region. The dam will begin to be overtopped by a flood having a discharge (peak and volume) equal to 15% of the PMF. The spillways will pass a 1% chance flood (100-year flood) without overtopping, which is a flood that has a 1% chance of being exceeded in any given year.
Download or read book National Dam Safety Program Clear Lake Dam MO 30437 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Walter G. Shifrin and published by . This book was released on 1981 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assessess the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
Download or read book National Dam Safety Program Siesta Lake Dam MO 31199 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Walter G. Shifrin and published by . This book was released on 1981 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
Download or read book National Dam Safety Program Valle Lake Dam MO 30438 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Walter G. Shifrin and published by . This book was released on 1981 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
Download or read book National Dam Safety Program Upper Valle Mines Dam MO 30370 Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Leonard M. Krazynski and published by . This book was released on 1980 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Upper Valle Mines Dam is an abandoned tailings dam constructed to impound sand, silt and clay tailings produced by the milling of barite ore. The dam is reported to be primarily an earth embankment with a relatively thin mantle of gravel-size tailings (chat), and cobble- to boulder-size bullrock. Both the upstream and downstream faces of the dam are heavily vegetated with brush and trees up to 18 in. diameter. The reservoir is nearly filled with fine tailings. Much of the impoundment area is densely vegetated with brush and trees. The spillway is a broad trapezoidal notch cut at the left abutment. The notch is cut into the native soil and will likely be moderately erodible during periods of flood flow. The visual inspection and evaluation of available information indicate the dam is in generally poor condition. This judgment is based on the inability of the spillway to pass the 1 percent probability-of-occurrence (100 year) flood without overtopping the embankment, the hazard of erosion posed to the embankment in the event of overtopping, the dense vegetation on the embankment, as well as the steep slopes and evidence of limited past slumping on the downstream face of the dam.
Download or read book National Dam Safety Program Dehner Lake Dam MO 30423 Upper Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Ralph E. Sauthoff and published by . This book was released on 1981 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
Download or read book National Dam Safety Program Highway 21 Lake Dam MO 31402 Upper Mississippi Kaskaskia St Louis Basin Jefferson County Missouri Phase I Inspection Report written by Harold B. Lockett and published by . This book was released on 1981 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report was prepared under the National Program of Inspection of Non-Federal Dams. This report assesses the general condition of the dam with respect to safety, based on available data and on visual inspection, to determine if the dam poses hazards to human life or property. (Author).
