Download or read book National Program for Inspection of Non Federal Dams South Silver Floodwater Retarding MA 00702 Connecticut River Basin Sandisfield Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1979 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is comprised of an earth embankment, a central principal spillway, and and emergency spillway. The embankment has a maximum fill height of approximately 31 feet and a crest length of 170 feet. The principal spillway consists of a concrete intake riser structure, an impact basin, and a 30 inch diameter reinforced concrete connector pipe. The visual inspection indicated the dam to be in generally good condition. The test flood (1/2 PMF) will produce an inflow of 1620 cfs. The resulting outflow through the spillway is 1120 cfs at elevation 1189, a surcharge of 5.5 feet. The spillway has a capacity of 1920 cfs at elevation 1191, top of the dam. The dam is in generally good condition. It is felt, however, that certain items need attention. These include extension of riprap protection along the dike forming the left training wall of the emergency spillway and refastening of two trash angles on the intake riser.
Download or read book National Program for Inspection of Non Federal Dams North Silver Lake Dam MA 00307 Connecticut River Basin Sandisfield Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1980 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1985 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Program for Inspection of Non Federal Dams Silver Lake Dam MA 00066 Connecticut River Basin Springfield Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1978 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silver Lake Dam is an earthfill embankment about 85 feet long, 12 feet high with a crest width averaging about 30 feet. The project appears to be in fair condition. Since the dam is classified as small in size, with a significant hazard potential, the test flood is one half the PMF. (Author).
Download or read book National Program for Inspection of Non Federal Dams West Lake Dam MA 00288 Connecticut River Basin Sandisfield Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1979 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book National Program for Inspection of Non Federal Dams Clam Lake Dam MA 01052 Connecticut River Basin Sandisfield Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1980 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is an earthfill embankment about 950 feet in length, and 94 feet in height, has a reinforced concrete principal spillway which is designed to maintain the recreation pool level and control the release of stored floodwater, and a 385 foot wide earth fill and earth excavated emergency spillway channel around the left abutment. No water is presently impounded by the dam because of serious deficiencies related to the soundness of the principal spillway structure and emergency spillway side slopes. The dam and appurtenances were found to be in POOR condition. The visual inspection indicated that the emergency spillway slopes are unstable, the downstream emergency spillway slopes have eroded, the principal spillway structure is failing at the transition, the pond drain intake structure is defective and the upstream and downstream slopes of the dam show erosion. Routing the test flood through the reservoir, with the initial pool level at the normal recreation stage, resulted in test outflow of 14,960 CFS which does not exceed the capacity of the spillways.
Download or read book National Program for Inspection of Non Federal Dams Abbey Lake Dam MA 00305 Connecticut River Basin Sandisfield Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1980 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is earthfill embankment about 210 ft. long and 39.5 ft. high and has a concrete principal spillway which maintains the recreation pool level and controls the release of stored floodwater, and a 50 ft. wide earth excavated emergency spillway channel around the left abutment. The dam appears to be in generally good condition. The classification of the dam is small in size and the hazard potential is high.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1985 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Program for Inspection of Non Federal Dams South Barre Mill Pond Dam MA 00091 Connecticut River Basin South Barre Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1978 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The South Barre Mill Pond dam is a small dam consisting of two adjacent concrete ogee spillways, a short earth embankment on the right side and an outlet works to a penstock at the left abutment. The present dam, constructed about 1904, was extensively damaged in the floods of 1936 and 1938 and has been reconstructed on several occasions, the latest work in 1944. The dam is in fair to good condition. There are no obvious signs of failure or conditions which would warrant urgent remedial treatment. Hydraulic analyses indicate that the spillway will not pass one-half the probable maximum flood and the spillway is considered inadequate, Recommendations for remedial work include repair of concrete at the left training wall and right spillway weir and restoration of gates to good operating condition. Additional investigation of the right spillway weir is recommended, since no data are available concerning this portion of the structure.
Download or read book National Program for Inspection of Non Federal Dams Powder Mill Pond Dam MA 00092 Connecticut River Basin South Barre Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1978 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Powder Mill Pond Dam is located on the Ware River approximately one mile upstream of South Barre, Massachusetts. The dam, reconstructed in 1908 to generate electric power for the Barre Wool Combing Company, consists of an upgated concrete spillway approximately 125 ft. long and 20 ft. high, a short emergency spillway and an outlet canal with two inoperative timber gates. The dam was extensively modified during the 1930's. Based on a visual examination of the structure, the facility is in fair to poor condition. Nevertheless, there was no evidence of structural failure or other conditions which would warrant urgent remedial treatment. Based on size and hazard classifications in accordance with Corps of Engineers guidelines, the test flood for this dam is the Probable Maximum Flood (PMF). The PMF outflow of 48,160 cfs would overtop the dam by 5.15 ft. With the water level at top of dam, the main and emergency spillways can pass 17,940 cfs which is 37 percent of the test flood.
Download or read book National Program for Inspection of Non Federal Dams Silver Lake Dam CT 00254 Connecticut River Basin Berlin Connecticut Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1979 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 140 foot long dam is an earth embankment, the top of which, at elevation 154.5, is approximately 15 feet above the streambed of Belcher Brook. A drop inlet at a flow line elevation about 4.5 feet below the top of the dam, is the spillway facility. A wooden gate extending the full 7.5 foot depth of the structure is the low level outlet, however it is apparently stuck in a closed position. The inlet structure feeds an arched brick culvert which has an estimated chord length of 7 feet and an effective depth of approximately 3 feet, due to heavy siltation. A recent partial collapse of the brick culvert where it abuts the downstream low-level outlet headwall caused partial blockage of the culvert as well as an approximately six foot wide cavity and sloughing to the crest of the dam on the downstream slope. Based on the visual inspection at the site and past performance, the dam is judged to be in very poor condition. Evidence of instability was noted in the form of a collapse of the outlet conduit and a subsequent failure of the downstream slope of the dam. There are other areas requiring attention as well. Based upon the hydraulics computations, the spillway capacity is 180 cfs to the top of the dam, which is equivalent to 72% of the routed test flood outflow.
Download or read book National Program for Inspection of Non Federal Dams Lake Rohunta MA 00012 Connecticut River Basin Athol Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1979 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam consists of a central 46 foot wide concrete spillway flanked by earthen embankments. The western embankment has a length of 250 feet and the eastern embankment has a length of about 280 feet. The dam has a size classification of intermediate and a hazard classification of low. The dam is in generally good condition. It is felt, however, that certain items which are generally normal maintenance and operational procedures need attention. The spillway will pass only 12% of the test flood outflow; the embankment will be overtopped by 3 feet.
Download or read book National Program for Inspection of Non Federal Dams Kendall Company Number 1 Dam MA 00047 Connecticut River Basin Colrain Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1981 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book National Program for Inspection of Non Federal Dams Congamond Lakes North Dike MA 00072 Connecticut River Basin Southwick Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1980 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Congamond Lakes North Dike impounds North Pond which is one of the three ponds which make up the Congamond Lakes. All of the three ponds, North Pond, South Pond and Middle Pond are interconnected by culverts or bridges. Together the three ponds are approximately three miles long and up to one-third mile wide with a total surface area of about 465 acres. The North Dike was constructed to replace an earlier dike (which plugged an old canal) and which failed in 1955. The North Dike is approximately 80 feet long with a maximum height of 29 feet. The present condition of the dike is fair. There is no spillway nor regulating gates at North Dike. The present outlet for the lakes is at Middle Pond where Berkshire Avenue crosses Great Brook about 2 miles to the south of North Dike. During annual floods, the direction of flow in Great Brook reverses itself and flows back towards Congamond Lakes. The outlet structure at Berkshire Avenue has stoplogs which are inserted to prevent Great Brook from flooding back into the lakes. While the stoplogs are in place, Congamond Lakes has no outlet. After the flood stage of Great Brook recedes, the stoplogs are removed and Congamond Lakes are allowed to drain. The PMF inflow into Congamond Lakes, assuming that the stoplogs are in place at Berkshire Avenue would cause the lake level to rise to approximate elevation 232 MSL which is about 2 feet below the top of the dike.
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1985 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Program for Inspection of Non Federal Dams Whiting Street Pond Dam MA 00070 Connecticut River Basin Holyoke Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1978 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whiting Street Pond Dam is an earth-buttresed stone masonry dam, 1900 feet long with a maximum height of about 19 feet. A two level stone masonry and concrete spillway is located about 70 feet from the dam's south abutment. A gatehouse and gate chamber are located at approximately the center of the dam and contain the operating mechanisms for controlling the outflows into the City's Water Supply and to the low level outlet. Discharges from the low level outlet and the spillway converge and flow into an unnamed creek before emptying into the Connecticut River. Phase I inspection and evaluation of Whiting Street Pond Dam does not indicate conditions which would constitute an immediate hazard to human life or property. Based on engineering judgement and the performance of the dam and the outlet works, the project is considered to be in fair condition. The project, however, does have a number of deficiencies which, if not remedied, have the potential for developing into hazardous conditions. The test flood, in accordance with Corps of Engineers guidelines, is the Probable Maximum Flood (PMF). The PMF yields an outflow of 8253 cfs which is greater than the maximum discharge capacity of the spillway of 215 cfs and would result in overtopping of the dam by about 1.4 feet.
Download or read book National Program for Inspection of Non Federal Dams South Deerfield MA 00522 Connecticut River Basin Whately Massachusetts Phase I Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1979 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is a 120 foot long concrete arch dam. It contains a 40 foot long, 28 foot high ogee spillway with provisions for three feet of flashboards, a 32 foot high, 53 foot long concrete non-flow section and an intake structure with manual controls. The visual inspection did not disclose any findings that indicate unsafe condition. The 100 year test flood used has an inflow and outflow of 1400 cfs which would overtop the non-overflow section by 1.8 feet with 3 feet of flashboards in place on the spillway. With 3 feet of flashboards in place, normal operation, the spillway capacity to the top of the dam (elevation 424) is 124 cfs or about 9 percent of test flood outflow. The overtopping of this non-overflow section is not serious since it is of concrete construction and can effectively act as an auxiliary overflow spillway. The dam is in generally good condition. However, the owner should frequently monitor the seepage from joints in the right abutment rock and the contract area between the left abutment and the downstream face. The owner should also repair cracks in the concrete face and monitor the horizontal and vertical construction joints and/or cracks to determine if seepage occurs in the future.
