National Program Of Inspection Of Non Federal Dams
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| Author | : OFFICE OF THE CHIEF OF ENGINEERS (ARMY) WASHINGTON DC. |
| Publisher | : |
| Total Pages | : 244 |
| Release | : 1982 |
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This report is a summary of the results of the National Program of Inspection of Non-Federal Dams, by the U.S. Army Corps of Engineers and completed on 30 September 1981. The recommendations provided in this report for improving the safety of non-Federal dams augment those offered in the report submitted to the Congress in 1976, prior to initiating the inspection of Non-Federal dams, and reflect additional findings resulting from these inspections.
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 102 |
| Release | : 1979 |
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This dam generally consists of a 190 foot masonry spillway, an earthfill embankment and 2 outlet pipes. The dam was designed in 1955 by Stone and Webster Engineering Corporation to replace an earlier dam, which was damaged by the flood of that year. Construction which utilized portions of the original structure was completed in 1957. The visual inspection showed the dam to be in good condition. However, water passing over the spillway limited the inspection of the spillway. The spillway is capable of passing 96% of the test flood outflow. The top of the embankment, elevation 175, would be overtopped by about 1 foot. However, failure under this condition would only cause insignificant damage as the downstream flooding would have already occurred. The dam is generally in good condition. However, it is recommended that the owner repair the drawdown outlet, and operate it at least once yearly to insure continued adequacy. After this outlet is repaired, or during a period of low flow, the owner should engage a qualified engineer to inspect the spillway without water flowing over it. Also the erosion of a retaining wall downstream of the spillway on the right abutment side should be repaired.
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 84 |
| Release | : 1978 |
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The dam is a 188 ft. long, 16 ft. high earth embankment dam. The condition is fair. The visual inspection did not disclose any immediate safety problems. The dam's spillway will not pass the test flood, therefore it is recommended that the owner engage a qualified engineer to evaluate further the potential for overtopping the inadequacy of the spillway. (Author).
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 84 |
| Release | : 1979 |
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| ISBN | : |
Kelleys Falls Dam is a run of the river type dam, with an overall length of 503 feet. Visual inspection of the dam indicated that the dam is in poor condition. The inspection revealed a number of leaks through the mass concrete spillway section, considerable loss of concrete from the spillway section, seepage around the concrete wall on the right side of the dam, and general deterioration of concrete on the abutments and hydro-building. Based on the intermediate size of the dam and the significant hazard classification and in accordance with Corps of Engineers guidelines, the test flood is one half the Probable Maximum Flood (PMF) or 55,900 cfs. The one half PMF outflow overtops the dam by 6.8 feet. With the water level at the top of the dam, the spillway will pass 38 percent of the test flood outflow. It is recommended that the owner engage a qualified engineer to make thorough investigation of the condition of the foundation of the spillway section of the dam, investigate the structural stability of the spillway section and ways to increase the spillway capacity. Also, the owner should remove the flashboards on the dam immediately. Additional keywords: Merrimack River Basin, Manchester, and New Hampshire.
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 123 |
| Release | : 1978 |
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| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 79 |
| Release | : 1979 |
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The dam is a 462 ft. long gravity concrete and earth embankment dam. The dam is judged to be in good condition. It is intermediate in size with a high hazard potential. The test flood is equal to the PMF. Based on the findings of the visual inspection and hydrological and hydraulic analysis, there is no need for further engineering studies or for major alterations to the dam. (Author).
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 98 |
| Release | : 1980 |
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The dam at the American Can Company building in Greenwich, Connecticut, consists of the north wall of a parking garage which retains earth and the adjacent created pond (North Lake) to a depth of five levels below grade. The height of this wall is 53 feet. There are no visible signs of physical distress and for reasons of fire protection, the water level is monitored very closely. Based on the visual inspection and a review of the technical data available, this dam is judged to be in good condition. This dam is classified as intermediate in size and a high hazard structure in accordance with the recommended guidelines established by the Corps of Engineers. The test flood for this dam is equal to the Probable Maximum Flood (PMF) and has an overflow discharge equal to 83 cfs. The maximum outflow capacity of the overflow weir under a stillwater condition; at the top of the weir opening is equal to 500 cfs, which represents more than 100 percent of the test flood. Rebuilding the headwall at the 48 inch outfall pipe is recommended within a 2 year period so that sedimentation buildup at this location can be monitored and clogging prevented.
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 135 |
| Release | : 1981 |
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The North Dam is a 318 ft. long earth dam with a maximum height of 34.7 ft. Generally, the dam is in fair condition. There are deficiencies which must be corrected. The South Dam is a 551 ft. long earth dam. The dam is also in fair condition. Both dikes are in fair condition. They also have deficiencies which must be corrected. (Author).
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 102 |
| Release | : 1979 |
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The dam is an earth embankment dam 510 ft. long and 21 ft. high. It is small in size with a high hazard potential. The dam is in good condition at the present time. There are remedial measures to be undertaken by the owner. A program of annual technical inspections should be continued. No conditions were observed which require further investigation. (Author).
| Author | : CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. |
| Publisher | : |
| Total Pages | : 141 |
| Release | : 1979 |
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The dam consists of two earth embankments herein referred to as the North and South Dams. The North dam is about 1190 ft. long and 37.5 ft. high. And the South Dam is about 33.5 ft. high and 434 ft. long. Both dams are intermediate in size with the North dam having a high hazard potential and the South Dam having a significant. The dam is in good condition at the present time. No conditions were observed which require additional investigation. (Author).
