Author: Paul R. Zaman Publisher: ISBN: Category : Languages : en Pages : 52
Book Description
Riss Lake Dam was inspected 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. Our inspection and evaluation indicates the spillway does not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. The spillway will not pass the probable maximum flood without overtopping but will pass 90 percent of the probable maximum flood, which is greater than the estimated 100-year flood. The spillway design flood recommended by the guidelines is 100 percent of the probable maximum flood. The probable maximum flood is defined as the flood discharge which may be expected from the most severe combination of critical meteorologic and hydrologic conditions which are reasonably possible in the region. Deficiencies visually observed by the inspection team were erosion of the upstream face due to wave action, ponded water on the dam crest due to poor drainage of rainwater, trees and brush growing on the embankment, animal burrows, and seepage at several locations below the dam.
Author: Harold P. Hoskins Publisher: ISBN: Category : Languages : en Pages : 45
Book Description
Riss Lake 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 property. Our inspection and evaluation indicates that the spillway does not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. The spillway will not pass a 100-year flood (flood having a one percent chance of being exceeded in any year). The spillway will pass 12% of the Probable Maximum Flood without overtopping the dam. The Probable Maximum Flood (PMF) is defined as the flood that may be expected from the most severe combination of critical meteorologic and hydrologic conditions that are reasonably possible in the region.
Author: Paul R. Zaman Publisher: ISBN: Category : Languages : en Pages : 39
Book Description
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. This dam is classified as a small size dam with a high downstream hazard potential. The inspection and evaluation indicates the spillway does meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. The criteria for a spillway on a small dam in the high hazard category is that the spillway pass 50 to 100 percent of the probable maximum flood without overtopping the dam. The spillway will not pass the probable maximum flood without but will pass 70 percent of the probable maximum flood. Considering the small volume of water impounded and the large flood plain downstream, one-half the probable maximum flood is the appropriate spillway design flood. Deficiencies visually observed by the inspection team were erosion, seepage at and undercutting of the concrete chute apron, and the presence of one small tree on the downstream embankment slope. There were no observed deficiencies or conditions existing at the time of the inspection which indicated an immediate safety hazard.
Author: Publisher: ISBN: Category : Research Languages : en Pages : 1300
Book Description
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author: C. L. Metzler Publisher: ISBN: Category : Languages : en Pages : 55
Book Description
The purpose of this 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. The inspection and evaluation indicates the spillways do not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. The spillways will pass 55 percent of the probable maximum flood, which is greater than the 100-year flood, without over topping the dam. The spillway design flood recommended by the guidelines is the 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 that are reasonably possible in the region. Deficiencies visually observed by the inspection team were minor seepage through the spillway weir wall, erosion on the upstream embankment, minor deterioration of the concrete weir, separation of riprap, brush growth on both faces of the structure, and a slide area on the downstream face. There were no observed deficiencies or conditions existing at the time of the inspection which indicated an immediate safety hazard. Future corrective action and regular maintenance will be required to correct or control the described deficiencies.
Author: Paul R. Zaman Publisher: ISBN: Category : Languages : en Pages : 51
Book Description
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 on visual inspection, in order to determine if the dam poses hazards to human life or property. Based on these guidelines, this dam is classified as a small size dam with a high downstream hazard potential. The inspection and evaluation indicates the spillway does not meet the criteria set forth in the guidelines for a dam having the above size and hazard potential. The spillway will not pass the probable maximum flood or 50 percent of the probable maximum flood without overtopping but will pass 40 percent of the probable maximum flood, which is greater than the 100-year flood. Deficiencies visually observed by the inspection team were erosion, absence of the riprap, protection on the upstream slope, sloughing of the upstream embankment, and erosion of the downstream embankment slope. Seepage and stability analyses required by the guidelines were not available. There were no observed deficiencies or conditions existing at the time of the inspection which indicated an immediate safety hazard.
Author: Paul R. Zaman
Author: 
Author: Harold P. Hoskins
Author: Paul R. Zaman
Author: 
Author: United States. Army. Corps of Engineers. St. Louis District
Author: 
Author: C. L. Metzler
Author: Paul R. Zaman
Author: United States. Army. Corps of Engineers. Kansas City District