Download or read book National Dam Safety Program Gudaitis Lake Dam MO 30702 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Richard G. Berggreen and published by . This book was released on 1980 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gudaitis Lake Dam is in the small size classification based on its maximum height of 25 ft and on its reservoir storage volume of about 180 ac-ft. The small dam classification includes dams between 25 and 40 ft in height or having storage capacities between 50 and 1000 ac-ft. The inspection and evaluation indicate the dam is in fair condition. This evaluation is primarily based on hydrologic analyses that indicate that a flood greater than 12 percent of the PMF will effectively overtop the dam. The dam will also be effectively overtopped by the one percent probability-of-occurrence (100 year) flood event. A 40 ft wide zone of slow seepage was noted at the toe of the dam, but the seepage water was not transporting any soil particles at the time of our inspection. The downstream face of the dam is heavily vegetated with relatively young trees up to 12 in. in diameter. This vegetation obscured portions of the dam from inspection. The spillway discharge channel is narrow and shallow and is bordered by many large trees. Deep gulley erosion is occurring where this channel traverses steeper slopes. Flood flows in this channel could cause overtopping of the channel and erosion of the channel walls, resulting in possible erosion at the toe of the dam.
Download or read book National Dam Safety Program Spring Lake Dam MO 30725 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Richard G. Berggreen and published by . This book was released on 1980 with total page 59 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: (a) Spillway will not pass 50 percent of the Probable Maximum Flood without overtopping the dam; (b) Overtopping of the dam could result in failure of the dam; and (c) Dam failure significantly increases the hazard to loss of life downstream.
Download or read book National Dam Safety Program Dorlac Lake Dam MO 30731 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Richard G. Berggreen and published by . This book was released on 1981 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The St Louis District (SLD), Corps of Engineers, has classified this dam as having a high hazard potential. The dam is classified intermediate size based on its height of about 45 to 50 feet. The downstream face is steep, on the order of 33 to 35 degrees, is constructed of cohesionless sand gravel, and could be severely eroded if overtopped. Scattered large trees up to 12 in. diameter are growing on the downstream face of the dam. The reservoir storage volume is completely filled with fine tailings and storage of water is limited to two small ponds at the upstream end of the impoundment, and shallow, intermittent ponds on the surface of the tailings. Hydraulic/hydrologic analyses indicate the dam and informal spillway will pass the 1 percent probability-of-occurrence event (100-year flood) without overtopping the embankment. These analyses further indicate the dam will be overtopped by a storm which produces greater than 55 percent of the Probable Maximum Flood (PMF). Based on the inspection of the Dam, it is recommended that further study be conducted without undue delay, under the guidance of an engineer experienced in the design and construction of tailings dams.
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 Pierce Lake Dam MO 30999 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Richard G. Berggreen and published by . This book was released on 1980 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pierce Lake Dam, Missouri Inventory Number 30999, was inspected. This dam is classified as small due to its 37 ft height and storage capacity of 681 ac-ft. A small dam is one which is less than 40 ft in height and impounds less than 1000 ac-ft of storage. The St. Louis District, Corps of Engineers, has classified this dam high hazard; we concur with this classification. The estimated damage zone, as determined by the St. Louis District, Corps of Engineers, extends approximately five miles downstream. The community of Richwoods and several other occupied structures are located within the estimated damage zone. The inspection and evaluation indicate that the dam is in generally poor condition. Specific deficiencies that were noted are insufficient spillway capacity, very steep downstream slope, 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.
Download or read book National Dam Safety Program Powder Spring Lake Dam MO 30749 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Karl L. Freese and published by . This book was released on 1980 with total page 68 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 Hornsey Lake Dam MO 30688 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Albert B Becker (Jr) and published by . This book was released on 1978 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the inspection was to assess the general condition of the dam with respect to safety and, based upon this inspection and available data, determine if the dam poses a hazard to human life or property. The following 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: A dense cover of small- to medium-size trees and brush that may conceal animal burrows exists on the upstream face of the dam. The upstream face of the dam is in an unkept state. The crest width of the dam is non-uniform and varies from approximately 60 feet to more than 100 feet. The course of the spillway outlet channel is not readily discernible due to the existence of dense brush and trees that begin at the end of the spillway control section. This dam, which is classified as intermediate in size and of high hazard potential, is specified to be the Probable Maximum Flood (PMF). Results of a hydrologic/hydraulic analysis indicated that the existing spillway is inadequate to pass the lake outflow resulting from a storm of PMF magnitude without overtopping the dam. The length of the downstream damage zone, should failure of the dam occur, is estimated to be six miles.
Download or read book National Dam Safety Program Potosi Lake Dam MO 30477 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Leonard M. Krazynski and published by . This book was released on 1980 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Potosi Lake Dam is an earth dam constructed for recreational purposes. The main spillway is a 3-ft dia corrugated metal pipe (CMP), or culvert, which discharges into an unlined earth channel. A 2-ft dia CMP serves as the auxiliary spillway and discharges into the same channel. A siphon (12-in. dia steel pipe) crosses the dam at about the midpoint. It crosses under the road and rests on the downstream slope. It discharges at the dam toe. The inspection and evaluation indicate that the dam is in generally poor condition. Specific deficiencies that were noted are inadequate spillway capacity, the high potential for spillway blockage, the dense growth of large trees and brush on the downstream slope and along the upstream crest, and lack of maintenance and periodic inspections. Hydrologic/Hydraulic studies indicate that the 10 percent probability-of-occurrence event (10-yr flood) will cause overtopping of the dam. These analyses also indicate that the dam will be overtopped for a hydrologic event which produces greater than eight percent of the Probable Maximum Flood.
Download or read book National Dam Safety Program Lonedell Lake Dam MO 31395 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by WOODWARD-CLYDE CONSULTANTS CHICAGO IL. and published by . This book was released on 1980 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 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 Dessieux Lake Dam MO 30994 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Albert B Becker (Jr) and published by . This book was released on 1978 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the inspection was to assess the general condition of the dam with respect to safety and, based upon this inspection and available data, determine if the dam poses a hazard to human life or property. Based on the criteria set forth in the recommended guidelines, and since numerous homes and a summer camping facility lie within the estimated flood zones, recommended spillway design flood for this dam, which is classified as small in size and of high hazard potential, is Probable Maximum Flood (PMF). PMF is the flood that may be expected from the most severe combination of critical meteorologic and hydrologic conditions that are reasonably possible in the region. Results of a hydrologic/hydraulic analysis indicated that the existing spillways (principal and emergency) are inadequate to pass the lake outflow resulting from a storm of PMF magnitude without overtopping the dam. A similar analysis also indicated that the spillways are inadequate to pass the lake outflow resulting from the 1 percent chance (100-year frequency) flood without overtopping the dam. The spillways are capable of passing lake outflow corresponding to approximately 13 percent of the PMF without overtopping the dam. The length of the downstream damage zone, should failure of the dam occur, is estimated to be six miles.
Download or read book National Dam Safety Program Floyd Lake Dam MO 30744 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Richard G. Berggreen and published by . This book was released on 1980 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Floyd Lake Dam has been classified by St Louis District, Corps of Engineers (SLD), as having a high hazard potential; we concur with this classification. The SLD estimated damage zone length extends approximately eight miles downstream of the dam. Within the potential downstream damage zone are 4 dwellings within the first mile and the town of Old Mines, approximately 2 mi downstream. The dam is classified small due to its 50 ac-ft storage capacity. The dam is 21 ft high. The classification for small size dams is based on a height between 25 and 40 ft of a storage capacity between 50 and 1000 ac-ft. The visual inspection and available information indicate the dam is in generally poor condition. The principal deficiencies noted were the inadequate spillway capacity, potential erosion at the toe of the dam by the flow in the discharge channel, and very dense vegetation on the downstream slope of the dam, obscuring the face from a thorough inspection. Seepage and stability analyses comparable to the requirements of the 'Recommended Guidelines for Safety Inspection of Dams' were not available, which is a deficiency that should be rectified. Hydraulic and hydrologic analyses indicate that the dam will be overtopped by the 10 percent probability-of-occurrence event (10-yr flood), and by a flood of greater than 5 percent of the PMF event. The PMF is defined as the flood event that may be expected to occur from the most severe combination of critical meteorological and hydrologic conditions that are reasonably possible in the region.
Download or read book National Dam Safety Program Dresser Number 1 Dam MO 31117 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 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).
Download or read book National Dam Safety Program New Dresser Number 4 Dam MO 31124 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 47 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 Henpeck Hollow Dam MO 31256 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Stanley F. Gizienski and published by . This book was released on 1981 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The St. Louis District, Corps of Engineers (SLD), has classified this dam as having a high hazard potential; we concur with this classification. The estimated damage zone length, as determined by the SLD, extends approximately four miles downstream of the dam. Within this estimated damage zone are a dam and reservoir (MO 31255), several dwellings and miscellaneous buildings. The dam is classified as small due to its approximately 60 ac-ft storage volume. The dam is approximately 24 ft in height. The small dam classification includes dams between 25 and 40 ft in height, or having storage volumes between 50 and 1000 ac-ft. Based on the distances to the nearest occupied dwellings, over 2.5 miles, the width of the valley downstream of the dam, on the order of 400 feet or more, and the relatively small impoundment volume, 50 percent of the PMF is recommended as the spillway design flood. The inspection and evaluation indicate the dam is in a generally poor condition. Primary reasons for this judgement are: the inadequate spillway capacity, the passage of discharge from the auxiliary spillway over the downstream slope, partial blockage of the main spillway by a beaver dam, lack of maintenance and lack of periodic inspections.
Download or read book National Dam Safety Program The Place Dam MO 30996 Mississippi Kaskaskia St Louis Basin Washington County Missouri Phase I Inspection Report written by Stanley F. Gizienski and published by . This book was released on 1980 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Place Dam, Missouri Inventory No. 30996, was inspected. Based on these guidelines, the St Louis District, Corps of Engineers (SLD), has determined that this dam has a high hazard potential; we concur with this classification. The damage zone length, as determined by the St Louis District, Corps of Engineers, extends approximately two miles downstream. Within the damage zone are several occupied dwellings. The dam is classified as small due to its 180 ac-ft storage volume. The dam height is approximately 16 ft. The small dam classification includes dams having a storage volume between 50 and 1000 ac-ft, or a height between 25 and 40 ft. Our inspection and evaluation indicate the dam is in generally poor condition. The major deficiencies noted were inadequate spillway capacity, the heavy growth of trees and bushes on the dam, the presence of animal burrows and lack of maintenance and periodic inspections. Seepage and stability analyses comparable to the requirements of the 'Recommended Guidelines for Safety Inspection of Dams' were not available, which is considered a deficiency.
Download or read book National Dam Safety Program Dresser Ind Old Number 1 No Name 587 Dam MO 30753 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 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of No Name 587 Dam is to impound tailings from a barite separation and beneficiation operation. The dam completely encircles the impoundment. Runoff from the watershed is diverted around the impoundment via diversion ditches. This dam is classified as intermediate size. The U.S. Corps of Engineers has classified this dam as having 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 approximately eight miles downstream of the dam. Information provided by the Corps of Engineers and the inspection indicates that about five dwellings, two railroad bridges, a highway bridge and the town of Mineral Point with about eighty dwellings are within this damage zone. The results of the inspection indicate the absence of facilities for discharging floodwater and inadequate freeboard and that the dam does not meet the criteria given in the Guidelines for a structure with the size and hazard potential of No Name 587 Dam. As an intermediate size dam with a high hazard potential, the Guidelines specify that the discharge capacity and/or storage capacity should be capable of safely handling the Probable Maximum Flood (PMF) without overtopping the crest.
