National Program for Inspection of Non-Federal Dams. Kendall Company Number 1 Dam (MA 00047), Connecticut River Basin, Colrain, 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 : 65
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Book Description
Kendall Company No. 1 Dam is a run of river facility that diverts water into a flume leading to the company's plant. Within the river channel there is a rock-filled, timber crib spillway structure 238 feet long. This overflow structure has a topwidth of 5 feet, and it has 2.9-foot high flashboards on its crest. The height of the dam, measured at the abutments of the spillway overflow section, is 24 feet. Based on visual inspection, the dam is judged to be in poor condition. The major concerns with respect to the integrity of the dam are deterioration of the wood crib abutment structure at the right end of the overflow section; trees growing in the wood crib abutment structure, on the upstream and downstream sides of the right abutment and on the dike; hazards resulting from the existing breach in the dike; lack of adequate erosion protection on the bank of the downstream channel near the left abutment; trees growing on the strip of ground between the dry stone masonry wall, on the left side of the downstream channel, and the right side of the concrete-lined flume on the left side of the valley; and lack of a low-level outlet for the dam. The spillway capacities are, respectively, about 22 percent and 38 percent of the routed test flood outflows. The depths of overtopping of the dam and dike that would occur during the test flood are 4.2 feet with the flashboards in place, and 3.5 feet with the flashboards removed.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 65
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Book Description
Kendall Company No. 1 Dam is a run of river facility that diverts water into a flume leading to the company's plant. Within the river channel there is a rock-filled, timber crib spillway structure 238 feet long. This overflow structure has a topwidth of 5 feet, and it has 2.9-foot high flashboards on its crest. The height of the dam, measured at the abutments of the spillway overflow section, is 24 feet. Based on visual inspection, the dam is judged to be in poor condition. The major concerns with respect to the integrity of the dam are deterioration of the wood crib abutment structure at the right end of the overflow section; trees growing in the wood crib abutment structure, on the upstream and downstream sides of the right abutment and on the dike; hazards resulting from the existing breach in the dike; lack of adequate erosion protection on the bank of the downstream channel near the left abutment; trees growing on the strip of ground between the dry stone masonry wall, on the left side of the downstream channel, and the right side of the concrete-lined flume on the left side of the valley; and lack of a low-level outlet for the dam. The spillway capacities are, respectively, about 22 percent and 38 percent of the routed test flood outflows. The depths of overtopping of the dam and dike that would occur during the test flood are 4.2 feet with the flashboards in place, and 3.5 feet with the flashboards removed.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 62
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Book Description
The McLeod Pond Dam consists of a series of earthen dikes and two concrete structures. The concrete structures are the main and auxillary spillways, each of which is positioned between outcrops of ledge. The age of the dam is unknown. Based on the irregularity of the configuration of the dikes and the differences in the concrete structures, it appears that the dam was constructed over a period of years. The concrete structures are in good to fair condition. The embankments are in fair to poor condition. There are no obvious signs of failure or seepage conditions, especially at the dikes, and low freeboard present at the dikes warrant remedial treatment within a year. Based on the size and hazard classification in accordance with the Corps of Engineers Guidelines, the spillway test flood falls between a 50-year flood and a 100-year flood. Hydraulic analysis indicates that the spillway will not pass the test flood without overtopping the earth embankments. However, both the dam and pond are quite small and the potential hazard, in the event of a dam failure, is very low. Additional investigations of the seepage at the dikes, the structural stability of the dikes and spillways and the method of providing additional freeboard at the dikes are recommended.
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Category : Government reports announcements & index
Languages : en
Pages : 1304
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Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 75
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The dam is generally comprised of a 401-foot long, 10 to 28 foot high main spillway, a head gate building, an overflow canal spillway and a canal leading to two 8 foot diameter penstocks used in electrical power generation. There are two inoperable gates located in the main dam. The dam is normally operated with two feet of flashboards above the spillway crest. The visual inspection did not disclose any findings that indicate an immediate unsafe condition. The 1 /2 PMF test flood used will produce an inflow/outflow of 70,830 cfs. The dam is a run-of-the-river type and the spillway crest would be overtopped by about 14 feet. The spillway has a capacity of 29,500 cfs (42 percent of 1/2 PMF outlfow) at elevation 166.6, top of non-overflow section. The non-overflow section is overtopped by about six feet. This flow would not overtop the upstream training walls which are at elevation 174.0. The overall condition of the dam is considered fair due to the lack of adequate draw down capacity. Remedial measures consist of removing vegetation from the downstream face of the dam, further observation of seepage at the right abutment, repair the wooden crest cover, and develop a formal warning system to warn downstream areas in case of an emergency.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
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ISBN:
Category :
Languages : en
Pages : 181
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The dam is an earthfill embankment about 920 feet in length, and 25 feet in height and has a reinforced concrete principle spillway, The dam has been rated fair. It has a classification of intermediate size and high hazard. Failure of the dam would pose a serious threat to about 11 houses, two major highway bridges, and three secondary road crossings.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 130
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North Silver Dam is about 1550 feet long with a maximum height of 76 feet. The dam has a chimney drain and a rock toe for internal drainage. The dam has been classified as intermediate in size with a high hazard potential. The dam is considered to be in fair condition. A major breach of the dam could cause appreciable damage to roads, bridges and residences in the downstream area.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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The Ware Industries Man (Upper) Dam consists of a main spillway 115 ft. long and approximately 34 ft. high, a spillway extension 50 ft. long and 4 ft. high, a concrete emergency spillway, a gate house with control works to a canal, and a 115 ft. long overflow weir from the canal. Based on a visual examination of the structure, the project is in good to fair condition. There was no evidence of structural failure or other conditions which would warrant urgent remedial action. The PMF outflow of 109,200 cfs would overtop the dam by 11.25 ft. With the water level at the top of dam, the spillway system can pass 7980 cfs which is 7.3 percent of the test flood.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 93
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Book Description
The dam is a 700 foot, 35 foot high earthfill embankment and a 920 foot long, 15 foot high earth-fill dike a gatehouse with outlet controls and a 10 foot wide concrete arch emergency spillway. With the water lever assumed to spillway crest at time of test flood, spilway discharge of about 30 cfs woudl occur. The reservoir woudl be surcharged to elevation 433, four feet above the spillway crest and two feet below the dam crest. The dam will not be overtopped. The dam is generally in fair condition. Remedial measures consist of removal of all brush and trees from the downstream slope of the main dam and spillway channel and repair of spalled and deteriorated concrete on the emergency spillway.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 111
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Book Description
The dams are in fair condition, due to the potential overtopping of the dams during the occurrence of the test flood and the reported overtopping of the dams during prior floods. There is some eroding of concrete joints in the dam, deteriorated concrete on appurtenant structures and observed seepage both from the joints in the concrete and from the embankments. The east dike is heavily overgrown with brush and young trees. Hydraulic analysis indicates that the test flood stage would be at elevation 240.3 which is approximately 4.3 feet above the top of the right embankment. Approximately 95 percent of the test flood would pass over the 60 foot dam, 29 foot dam and the small dam spillways. The remaining flow would be over the right embankment between the screen house and the mill building.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 88
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The dam is a run-of-the-river type structure consisting of a 17 ft. high concrete overflow spillway and a 13 ft. high rockfill dike. The total height of the structure is 23 ft. from the top of the dike to the streambed at the toe of the spillway. There are deficiencies which must be corrected to assure the continual performance of this dam. The dam has been classified as intermediate in size with a hazard potential of high.
