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Author: United States. Army. Corps of Engineers. St. Louis District
Publisher:
Published: 1978
Total Pages: 76
ISBN-13:
DOWNLOAD EBOOK →Author: Nathan Wilcoxon
Publisher:
Published: 1981
Total Pages: 66
ISBN-13:
DOWNLOAD EBOOK →Hilltop Fishing Lake is an earthfill structure approximately 24.9 feet high and 1,500 feet long at the crest. The embankment has a horseshoe shape and forms three sides of the lake. The dam has no spillway or drawdown facility. Our inspection and hydrologic and hydraulic analyses indicate that the capacity of the dam meets the criteria set forth in the guidelines for a dam having the above size and hazard potential. The dam will hold and pass approximately 65 percent of the Probable Maximum Flood (PMF) without overtopping. The dam appeared to be in poor condition. Several deficiencies were noted during the inspection. The face of the embankment had varying slopes with some of them being rather steep. There are serious erosion problems on most of the dam, including shoreline erosion due to wave action. There are also numerous animal holes in the embankment. There is a poor vegetal cover on most of the dam. Another deficiency is the lack of seepage and stability analyses records.
Author: Walter G. Shifrin
Publisher:
Published: 1981
Total Pages: 84
ISBN-13:
DOWNLOAD EBOOK →Sunrise Lake Dam was inspected. The overall condition of the dam appears to be fair; however, several deficiencies were noted by the inspection team. These deficiencies included: seepage under the spillway slab; cracks and spalling of the concrete in the spillway; the erosion of the banks of the discharge channel of the spillway; the erosion of the upstream slope due to wave action; several shallow surface sloughs observed on the embankment slopes; the presence of saplingss and brush on the embankment slopes and trees along the downstream, right abutment/embankment contact; a need for periodic maintenance of the grass cover; and a lack of a maintenance schedule. There exists a need for periodic inspection by a qualified engineer. The lack of seepage and stability analyses on record is also a deficiency that should be corrected.
Author: Steve Brady
Publisher:
Published: 1980
Total Pages: 62
ISBN-13:
DOWNLOAD EBOOK →Grisham Lake Dam is an earthfill structure approximately 25 ft high and 765 ft long at the crest. The appurtenant works consists of an earth cut swale spillway at the north abutment. 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 pass 22 percent of the Probable Maximum Flood without overtopping. The embankment appears to be in good condition. Deficiencies visually observed by the inspection team were: (1) Few small trees on upstream face of embankment; (2) very dense brush and tree growth on downstream face of embankment; (3) lack of wave protection for upstream face of embankment; (4) minimal elevation difference between the spillway crest and the low point of the dam crest; and (5) lack of non-erodible spillway control section.
Author: United States. Army. Corps of Engineers. St. Louis District
Publisher:
Published: 1978
Total Pages: 148
ISBN-13:
DOWNLOAD EBOOK →Author: ARMY ENGINEER DISTRICT ST LOUIS MO.
Publisher:
Published: 1978
Total Pages: 43
ISBN-13:
DOWNLOAD EBOOK →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. Evaluation of the spillways' size indicates that they do not meet the criteria in the guidelines. The spillways of dams No. 2 and 3 are of inadequate size to pass the one percent chance flood (100-year flood) without overtopping. The spillway of dam No. 1 is just adequate to pass the one percent chance flood; but if either dam No. 2 or No. 3 failed due to overtopping, dam No. 1 would overtop also. The inspection team observed trees and bushes growing in the three dams inspected, particularly dam No. 3. These root systems are a potential seepage hazard. Localized areas of the embankment slopes are exceptionally steep. Steady seepage conditions exist through dam No. 1 and a localized seepage area was found downstream of dam No. 2. The pool of the dam No. 2 was on the downstream slope of dam No. 3 and seepage could not be evaluated. The three spillways do not appear sufficiently resistant to prevent embankment erosion at high flows for an indefinite time. Stilling basins are needed below each spillway. Seepage and stability analyses are not on record as recommended in the guidelines.
Author: Steve Brady
Publisher:
Published: 1980
Total Pages: 54
ISBN-13:
DOWNLOAD EBOOK →Treeline Lake Dam is an earthfill structure approximately 41 ft high and 740 ft long at the crest. The appurtenant works consist of a trapezoidal cut earth spillway located at the left abutment. 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 pass 45 percent of the Probable Maximum Flood without overtopping. The dam appears to be in good condition. Deficiencies visually observed by the inspection team were: (1) high weed growth on both embankment faces; (2) several minor erosion channels and evidence of vehicular traffic on the downstream embankment face; (3) seepage and erosion at the downstream right abutment-dam contact; (4) wet, marshy area at and beyond the downstream embankment toe; (5) lack of a non-erodible spillway control section; and (6) lack of wave protection for the upstream embankment face.
Author: Harold P. Hoskins
Publisher:
Published: 1978
Total Pages: 43
ISBN-13:
DOWNLOAD EBOOK →Structure No. 1 - Williams Creek 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. 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 pass the 100-year frequency storm and also the storm equal to 29% 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. Additional deficiencies, in accordance with the guidelines, are the lack of seepage and stability analysis. These analyses should be obtained in the future. Other deficiencies visually observed by the inspection team were a few small trees growing on the upstream embankment slope, some erosion of the downstream berm and low spots in the crest of the dam were water ponds.
Author: Steve Brady
Publisher:
Published: 1979
Total Pages: 62
ISBN-13:
DOWNLOAD EBOOK →The dam is located in the southeastern part of Crawford County, Missouri on Shoal Creek. The dam was constructed primarily for recreational purposes, although some flood protection is also provided. The dam appears to be generally in good condition. Some sloughing of the upstream slope above the riprap was noted. The riprap consists of concrete and rock rubble from old buildings. A few small trees were observed on the downstream face of the embankment. The horizontal and vertical alignments of the crest are good. No surface cracking of the embankment was noted. Shallow auger probes into the embankment indicated the dam to consist of a reddish brown silty clay with rock fragments. Information from the builder indicates that the borrow material for construction of the embankment was obtained from the hillside in the east abutment area, the emergency spillway area and the lake area.
Author: Albert B Becker (Jr)
Publisher:
Published: 1978
Total Pages: 52
ISBN-13:
DOWNLOAD EBOOK →Based on a visual inspection, certain deficiencies were noted during the inspection and are considered to have an adverse effect on the overall safety and future operation of the dam and spillway. At the time of the inspection, the grass growing on the crest, and the upstream and downstream faces of the dam was on the order of 24 inches high. The grass should not be allowed to grow to a height that provides cover for burrowing animals or hinders inspection of the dam. Several areas of dense brush that may conceal animal burrows and trees exist on the crest and upstream and downstream faces of the dam. Several holes that appear to be animal burrows were observed in the upstream face, downstream face, and crest of the dam. The upstream face of the dam is grass covered throughout. A considerable amount of erosion of the upstream slope of the dam at the waterline has occurred. The concrete retaining wall located on the downstream side of th dam near the left abutment that serves to support the embankment at this location is cracked in several locations. The concrete slope paving located on the right bank of the principal spillway outlet channel at a point approximately 100 feet downstream of the spillway crest is undercut and the pavement subgrade and embankment extensively eroded.
