National Program for Inspection of Non-Federal Dams. Stony Brook Dam (MA 00132), Merrimack River Basin, Westford, Massachusetts. Phase I Inspection Report PDF Download
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Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
The dam is a 350 foot long, 24 foot high, gravity, earth embankment structure with a 20 foot long masonry spillway and two sealed outlets. The visual inspection indicated the dam to be in generally fair condition. The deficiencies noted during the inspection include the presence of roots of trees growing on the upstream and downstream faces which could cause internal erosion of the dam; the spillway gates have not been operated in several years; and there is no drawdown facility. Considering the reservoir to be at its normal elevation of 183.5, the spillway can pass 485 cfs or 10 percent of the outflow, resulting in the dam being overtrapped by about 3.3 feet. Raising and or removal of gates will increase discharge capacity to 25 percent.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Book Description
The dam is a 350 foot long, 24 foot high, gravity, earth embankment structure with a 20 foot long masonry spillway and two sealed outlets. The visual inspection indicated the dam to be in generally fair condition. The deficiencies noted during the inspection include the presence of roots of trees growing on the upstream and downstream faces which could cause internal erosion of the dam; the spillway gates have not been operated in several years; and there is no drawdown facility. Considering the reservoir to be at its normal elevation of 183.5, the spillway can pass 485 cfs or 10 percent of the outflow, resulting in the dam being overtrapped by about 3.3 feet. Raising and or removal of gates will increase discharge capacity to 25 percent.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
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Book Description
The dam consists of a stone masonry main spillway with flashboards and an adjacent canal inlet structure. The 76 ft. long dam has a main spillway about 40 ft. in length. The maximum height of the dam is estimated to be 9.3 ft. The dam is confirmed to have a 'significant' hazard potential. The dam is said to be in good condition. The test flood for this dam is 1/2 the PMF. (Author).
Author:
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ISBN:
Category :
Languages : en
Pages : 1228
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Book Description
Author:
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Category : Science
Languages : en
Pages : 1242
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Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 85
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Total length of the dam is about 800 ft. with a height of about 22 ft. Although there were some minor deficiencies noted the dam is considered to be in good condition. It is intermediate in size with a hazard potential of high.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
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Book Description
Lake Wampanoag Dam is approximately 660 feet long including the spillway and has a maximum height of approximately 22 feet. It consists of an earth embankment with riprap at the upstream face and a loamed and seeded crest and downstream face. Based on the size classification (intermediate) and hazard potential classification (high), the spillway test flood is the PMF.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 49
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Book Description
The dam appears to be in good condition, The 'V' spillway is 90 ft. long with effective abutments of about 10 ft. on either end. The dam is about 15 ft. high at the abutments. Although the dam is in the small size category the hazard potential is extremely high and thus the situation was analyzed using the full probable maximum flood. A failure of the dam would overflow the left bank immediately below the dam, flood nearby buildings and streets.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 101
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Book Description
The dam consists of an earth dike, about 250 ft. long on the left bank of the river, and a z-shaped stone masonry spillway about 212 ft. long. The dam itself is generally in good condition. There was no evidence of settlement, lateral movement or other signs of structural failure. It is small in size with a high hazard potential.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 81
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Book Description
Pleasant Street Dam consists of an approximately 93 ft. long stone masonry spillway with a brick building at each abutment. The spillway itself is approximately 15 ft. high and probably founded on bedrock. There is a 4 ft. square low-level gated outlet through the spillway structure and stoplogged conduit outlets through the building at the right abutment. The overall condition of Pleasant Street Dam can only be considered fair, primarily because the spillway of the dam was obscured by heavily flowing water and the operation of the low-level outlet was not demonstrated. However, visible portions of the dam are generally in good condition, and the dam is performing adequately. There was no evidence of settlement, lateral movement or other signs of structural failure, or other conditions which would warrant urgent remedial action. With the water level 3.8 ft. above the spillway crest, corresponding to the estimated top of dam level, the spillway capacity is approximately 2,500 cfs, which is 12 percent of the test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
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Category :
Languages : en
Pages : 80
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Book Description
Foss Reservoir Dam is a 1640 foot earthfill dam with a maximum height of 29 feet. Although the dam is in good condition, the spillway will not pass the peak test flood outflow without overtopping the dam. The dam has been classified in the intermediate size and high hazard categories. It is recommended that the owner employ a registered professional engineer to conduct a more detailed hydraulic and hydrological study.
