National Program for Inspection of Non-Federal Dams. Wheeler Pond Dam (CT 00239), Thames River Basin, Montville, Connecticut. Phase I Inspection Report PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download National Program for Inspection of Non-Federal Dams. Wheeler Pond Dam (CT 00239), Thames River Basin, Montville, Connecticut. Phase I Inspection Report PDF full book. Access full book title National Program for Inspection of Non-Federal Dams. Wheeler Pond Dam (CT 00239), Thames River Basin, Montville, Connecticut. Phase I Inspection Report by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.. Download full books in PDF and EPUB format.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 73
Get Book Here
Book Description
Wheeler Pond Dam is a masonry structure constructed in the early 1800's. The dam has a maximum height o 20.0 feet and is approximately 54.0 feet long. It is comprised of a 21.0 foot concrete ogee spillway at the left abutment and a 33.0 foot vertical masonry wall at the right abutment. The outlet works at the left abutment is a system of intake chambers and valve pits which withdraw a supply of process water for the adjacent mill complex. Based upon the visual inspection at the site, the lack of engineering back-up data available, and no operational or maintenance evidence, there are areas of concern which must be corrected to assure the long term performance of this dam. The dam is considered to be in fair condition with the following visible signs of concern: the inoperable, low-level spillway gate, the poor condition of the mill intake and by-pass chamber and valve pit system now used for the control of water levels in the pond, the obstructed downstream channel and the apparent lack of maintenance of the dam and its appurtenances. A spillway design test flood of 6995 cfs one half of the probable maximum flood) will overtop the dam by approximately 6.92 feet.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 73
Get Book Here
Book Description
Wheeler Pond Dam is a masonry structure constructed in the early 1800's. The dam has a maximum height o 20.0 feet and is approximately 54.0 feet long. It is comprised of a 21.0 foot concrete ogee spillway at the left abutment and a 33.0 foot vertical masonry wall at the right abutment. The outlet works at the left abutment is a system of intake chambers and valve pits which withdraw a supply of process water for the adjacent mill complex. Based upon the visual inspection at the site, the lack of engineering back-up data available, and no operational or maintenance evidence, there are areas of concern which must be corrected to assure the long term performance of this dam. The dam is considered to be in fair condition with the following visible signs of concern: the inoperable, low-level spillway gate, the poor condition of the mill intake and by-pass chamber and valve pit system now used for the control of water levels in the pond, the obstructed downstream channel and the apparent lack of maintenance of the dam and its appurtenances. A spillway design test flood of 6995 cfs one half of the probable maximum flood) will overtop the dam by approximately 6.92 feet.
Author: National Dam Inspection Program (U.S.)
Publisher:
ISBN:
Category : Dam safety
Languages : en
Pages :
Get Book Here
Book Description
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
Get Book Here
Book Description
The Packers Pond Dam, built about 1880 to provide water for industrial use, is an earth embankment impounding 450 acre-feet of water on Mill Brook. The length of the dam, including the spillway, is 325 feet. The top of the dam averages between 12-15 feet in width and is approximately 18 feet above the old streambed at the spillway discharge channel. The spillway, located at the right end of the dam, is a 64 foot long, broad-crested, stone masonry structure which provides 4.4 feet of freeboard from the crest to the top of the dam. The outlet is a concrete intake and gate structure located on the upstream slope at the left end of the dam. The gate is not functional and the size of the outlet could not be exactly determined. However, the outlet is assumed to be approximately 3 feet wide by 2.5 high. A railroad embankment runs along the downstream toe of the dam. This embankment is about 24 feet in height, with the top of the embankment approximately 12 feet higher than the top of the dam. The spillway capacity with the pond level at the top of the dam is 1700 cfs, which is 28% of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 184
Get Book Here
Book Description
Stony Brook Reservoir Dam consists of two earthfill embankments with concrete core walls, separated by a 650 ft. long natural promontory. A concrete spillway, 35 ft. wide, is located in the Side Dam. The spillway discharges into a stone masonry channel about 220 ft. long. A gate house located upstream from the Main Dam houses controls for the inlet to a 24 in. dia. water supply line and a 24 in. dia. low level outlet. The dam and appurtenant works are judged to be in generally fair condition. Brush was growing on the downstream slopes of both dams and in the spillway discharge channel. The gate house is in need of repair and the condition of the outlet gate could not be verified. Seeps were found downstream of both dams and cavities were found in the slopes of both embankments. The routed test flood outflow of 5,200 cfs overtops the crest of the Main Dam by 1.3 ft. and the Side Dam by 0.6 ft. The spillway can pass 1,250 cfs or about 24 percent of the routed test flood outflow without overtopping the Main Dam.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
Get Book Here
Book Description
The dam consists of a concrete principal spillway, embankments to the right and left of this spillway and an emergency spillway near the right end of the dam. The principal spillway is a concrete chute with weir-boards at the upstream end and the emergency spillway is an unlined channel cut into the right end of the embankment. A swale, which will overflow to the toe of the dam at approximately the same elevation as the auxiliary spillway, exists at the left end of the dam. There is no low-level outlet at the dam. Based upon the visual inspection at the site and past performance, the dam appears to be in fair condition with items which require repair, maintenance and monitoring. These include spalling of the concrete walls at the principal spillway, seepage through the embankments, trees and brush on the embankments and in the emergency spillway, erosion of the upstream slopes, extending the embankment to fill the swale at left end of the dam, and debris and overhanging brush in the spillway discharge channels. The total spillway capacity at the same pool level is 820 cfs, which is greater than 100% of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 85
Get Book Here
Book Description
North Grosvenordale Pond Dam is a composite masonry and earth dam consisting of two downstream stepped, ashlar faced masonry overflow sections, a granite block and earth fill right abutment and an earth fill right abutment and and earthfill dike on the left abutment. The entire length of the dam is about 2,400 ft. It is a run-of-the-river dam which once served the industrial needs of the downstream mill. Outflows through the millrace are now used for fire protection of the mill. North Grosvenordale Pond is about 1.5 miles long and has a surface area at spillway level of about 60 acres. The drainage area above the dam is about 99 sq. mi. and the maximum storage to the top of the dam is estimated at about 840 acre-ft. The dam is judged to be in generally fair condition. At the time of the inspections, water was flowing over the right spillway, so that it was not possible to observe the condition of the downstream ashlar face, or to determine whether there is any erosion at the toe of the spillways. The crest of the left spillway is higher than the right spillway. The difference is less than 6 in. The sluiceway through the left spillway is inoperative. Some of the left spillway stones have been dislodged and displaces. Several joints in the training walls are in need of repointing. The bridges over the spillways are in a deteriorating condition. Tree and brush growth is abundant along the left abutment dike. The spillways are not adequate to pass the 1/2 PMP test flood of 25,400 cfs without overtopping the non-overflow sections of the dam. The test flood would overtop the dike by about 2.2 ft. The spillway can pass 4,950 cfs or about 20 percent of the test flood without overtopping the dike.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
Get Book Here
Book Description
Congdon dam is a stone-faced earth embankment dam constructed around 1900 and was used for power and process water at a mill located downstream which is presently abandoned. The dam has a maximum height of 35 feet and is approximately 150 feet in length (including the spillway). The spillway is a stone masonry uncontrolled, vertical fall, sharp crested weir, 50 feet in length. The assessment of the facility is based on the visual inspection sine engineering, operational and maintenance data are not available. The dam is judged to be in FAIR condition with several maintenance items that require attention to insure the long-term performance of the structure. They include; inoperable outlet works structures, missing and dislodged masonry blocks on the downstream face of the dam, seepage along the downstream face of the right of the overflow spillway, missing mortar between the stone masonry, the lack of a scheduled inspection or maintenance program, an irregular crest surface, and trees and brush growing in the stone masonry walls, spillway and on top of the dam. Assuming the pool elevation at the top of the dam, the spillway can pass a flow of 1,845 CFS, which represents only 24 percent of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Get Book Here
Book Description
The dam at Lower Ross Pond is approximately 600 ft. long, 6 feet high, and is an earth embankment with a downstream stone masonry-concrete capped face. The earth fill section varies in width from 3 to 10 feet along the upstream face and has varying slopes into the pool. The downstream face of the dam is vertical. There are two uncontrolled overflow spillways about 128 feet apart through the dam. The easterly spillway is a masonry and concrete capped weir 12.5 feet long. Short masonry training walls lead into the reservoir pool and channel overflows to the weir section. The downstream channel is Half Hill Brook which meanders through wooded terrain. The westerly spillway weir is 13 feet wide and also has training walls leading into the pond. The easterly spillway crest is approximately 2 feet below the westerly spillway crest. There is no outlet works for the dam. The spillway capacity is hydraulically inadequate to pass the 'test flood' (100-year) and this flow would overtop the by approximately 0.40 feet assuming the overflow length of the dam was equal to 100 feet. The inflow and routed outflow discharge value for this test flood are 296 CFS and 250 CFS, respectively. The maximum outflow capacity of the spillway without overtopping the dam is 142 CFS which is 57 percent of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 91
Get Book Here
Book Description
The dam at Hopeville Pond is approximately 493 feet long (including the overflow spillway) and is an earth embankment structure. The embankment is about 18 feet high with an average crest width of 10 feet. The overflow, concrete-stone masonry vertical fall spillway, is approximately 108 feet in length and located 187 feet from the right abutment. There are two outlet works structures. The dam is judged to be in FAIR condition with several deficiencies that require attention. The deficiencies include: lack of slope protection on the upstream slope, rotting tree stumps on the upstream and downstream slopes, trees growing on the downstream slope, and seepage at the downstream toe and left abutment. The maximum spillway discharge of 3985 CFS represents only 22.9 percent of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 127
Get Book Here
Book Description
Pachaug Pond Dam is an earth embankment which has a maximum height of 17.0 ft. and is approximately 770.0 feet long. The dam is considered to be in fair to good condition. A spillway design test flood 24,800 cfs (equal to the PMF) will overtop the dam by approximately 4.0 feet.
