Download or read book National Program for Inspection of Non Federal Dams Seymour Reservoir Number 4 Dam CT 00325 Naugatuck River Basin Oxford Connecticut 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 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seymour Reservoir No. 4, a storage reservoir for public water supply is impounded by a main dam and two dikes. The main dam consists of an earth embankment approximately 425 feet long, with a top width of 20 feet, and a maximum height of 28 feet. The right dike begins approximately 100 feet to the right of the main dam, and consists of an earth embankment approximately 400 feet long, with a top width of 15 feet, and a maximum height of 22 feet. The left dike is located approximately 1,000 feet upstream of the main dam on the left bank of the reservoir, and consists of an earth embankment approximately 160 feet long, with a top width of 15 feet and a maximum height of 12 feet. The low level outlets or blowoffs consist of 10 and 8-inch cast iron pipes through the main dam embankment. The spillways consist of an 18-inch concrete overflow pipe through the right dike embankment, two 24-inch concrete overflow pipes through the main dam embankment, and an auxiliary earth spillway located at the left abutment of the left dike. Based on the visual inspection and a review of all available pertinent data, the dam is judged to be in poor condition. Some features that could affect the integrity of the dam and dikes include the seepage and possible internal erosion at the toe of the main embankment, possible internal leakage from the blowoff and spillway pipes, and the lack of filter layers between the riprap and embankment materials. The spillway is capable of passing 102 percent of the routed Test Flood outflow without overtopping the dam.

Download or read book National Program for Inspection of Non Federal Dams Seymour Reservoir Number 3 Dam CT 00323 Naugatuck River Basin Oxford Connecticut 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 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Seymour Reservoir No. 3 Dam consists of an earth embankment with a masonry core wall. The embankment has a top width of 14 feet and a maximum height of 42 feet. The overall length of the dam is 730 feet, including 23.5 foot long concrete overflow spillway. The outlet works consist of a 12-inch cast iron low level outlet or blowoff pipe through the earth embankment and core wall. The dam impounds the Seymour No. 3 Reservoir, a storage reservoir for public water supply for the Valley Division of the Bridgeport Hydraulic Company. Based on the visual inspection and a review of all available pertinent data, the dam is considered to be in fair condition. Features that could affect the structural integrity of the dam are undermining and seepage associated with the left wall of the spillway discharge channel; uncontrolled seepage that bypasses the underdrain; and the absence of an upstream gate on the low level outlet or blowoff line. The spillway can discharge 132 percent of the routed Test Flood outflow with flashboards and 151 percent without flashboards. The Test Flood would not overtop the dam.

Download or read book National Program for Inspection of Non Federal Dams Seymour Reservoir Dam Number 2 CT 00324 Naugatuck River Basin Oxford Connecticut 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 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Seymour Reservoir No. 2 Dam consists of an earth embankment with a masonry core wall. The dam is approximately 900 feet long with a top width of 10 feet and a maximum height of 31 feet. A 25.75 foot long concrete overflow spillway is located near the right end of the dam. The outlet works consist of a 12-inch cast iron low level outlet or blowoff pipe through the embankment, controlled by a downstream gate valve. In addition to the main dam, a low dike is located on the right side of the reservoir. The earth dike is approximately 800 feet long with an average height of 6 feet and a top width of 15 feet. Based on the visual inspection and a review of all available pertinent data, the condition of the dam is judged to be fair. The future integrity of the dam can be affected by deterioration of the floor of the spillway channel; seepage exiting downstream of the dam; the absence of an upstream gate on the low level outlet or blowoff line; and inadequate spillway capacity. The spillway has a capacity of 500 cfs without any flashboards and 100 cfs with flashboards before overtopping the low point of the dam crest. With flashboards, the spillway can pass 18 percent of the routed Test Flood outflow. Without any flashboards the spillway can pass 91 percent of the routed Test Flood outflow and the outflow would overtop the low point of the dam crest by 0.2 feet.

Download or read book National Program for Inspection of Non Federal Dams Seymour Reservoir Number 1 Dam CT 00358 Naugatuck River Basin Beacon Falls Connecticut 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 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Seymour Reservoir No. 1 Dam consists of an earth embankment with a stone masonry core wall. The dam has an overall length of 340 feet including spillway; a top width of 10 feet; and a maximum height of 26 feet. The overflow spillway consists of a 23-foot concrete weir with stone masonry training walls. The outlet works consist of two 12-inch cast iron pipes through the earth embankment and core wall of the dam, controlled by manually operated gates in an upstream gage house. Based on the visual inspection and review of all pertinent data, the condition of the dam is judged to be fair. Features that can affect the integrity of the dam are the deterioration of the spillway weir, the seepage exiting at the toe and downstream of the dam, and inadequate spillway capacity. Due to the small size of the impoundment, the Test Flood outflow was assumed to equal the Test Flood inflow of 625 cfs and would overtop the low point of the dam crest by 0.9 feet. The spillway capacity with the water level at the low point of the dam crest is equal to 105 cfs or 17 percent of the Test Flood.

Download or read book National Program for Inspection of Non Federal Dams Waterbury Reservoir Number 2 Dam CT 00304 Naugatuck River Basin Prospect Connecticut 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 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waterbury Reservoir No. 2 Dam consists of an earth embankment with a downstream stone masonry wall. The dam has a top width of 22 feet, a maximum height of 20 feet, and an overall length of 230 feet including a 40 foot long overflow spillway located near the left end of the dam. The outlet works consist of a gate chamber at the right of the spillway, and a 12-inch cast iron pipe extending approximately 100 feet downstream of the dam. The dam impounds Waterbury Reservoir No. 2 which was formerly used as a storage reservoir for public water supply and currently serves no formal purpose. Based on the visual inspection, the dam is judged to be in poor condition. Features that could affect the future integrity of the dam are seepage at the base of the masonry wall and downstream of the dam; erosion of the upstream slope and crest; and the inaccessibility of the low level outlet or blowoff gates. The spillway capacity with the water level at the top of the dam is 410 cfs and is equal to 156 percent of the test flood routed outflow.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1984-10 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Program for Inspection of Non Federal Dams Pitch Reservoir Dam CT 00474 Naugatuck River Basin Morris 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 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pitch Reservoir Dam is a 920 foot long earth embankment and concrete dam. The earth embankment section is 800 feet long and has a maximum height of 94 feet. The concrete section is 120 feet long with a height of about 40 feet. The spillway is located on the left (east) side of the dam. The top width of the earthen embankment is 20 feet and the concrete section is 12 feet. The visual inspection of Pitch Reservoir Dam indicated that the dam is in good condition and well maintained. The inspection revealed the efflorescence of the joints of the concrete section of the dam existed and an animal burrow was found beneath the tow of this section. Water was observed flowing from a perforated pipe adjacent to the service road in the vicinity of the west embankment. Minor deterioration and slight seepage through joints was observed near the top of the spillway wall. Based on its intermediate size and significant hazard classification in accordance with the Corps guidelines the test flood is equal to the Probable Maximum Flood. The spillway will pass the test flood outflow of 4725 cfs with a pool elevation 731.1 feet which is 4.9 feet below the top of the dam.

Download or read book National Program for Inspection of Non Federal Dams Kinneytown Dam CT 00089 Naugatuck River Basin Seymour Connecticut 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 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kinneytown Dam is a run-of-the-river dam across the Naugatuck River and consists of a concrete ogee spillway section with a crest length of 413 feet. The maximum height of the dam is 32.5 feet. A railway embankment forms the left abutments and an earth embankment approximately 50 feet in length connects the right training wall to the right abutment. The low level outlet or blow-off consists of a 48-inch cast iron pipe through the left end of the spillway controlled by an upstream sluice gate. A diversion intake structure and canal located to the left of the dam and separated from the river by a railroad embankment diverts water from the impoundment to a downstream ponds, where it is used to generate electricity and for processing purposes for a downstream manufacturing plant. Based upon the visual inspection and a review of all available pertinent data, the dam is considered to be in fair condition. The erosion and undermining of the spillway apron, deterioration of the concrete of the spillway, aprons, and training walls, seepage downstream of the left training wall and through the right training wall, deterioration and lateral movement of the left sheet pile wall, and tree growth on the earth embankment require further investigation or attention. The calculated test flood outflow of 63,000 cfs would overtop the dam by 0.3 feet. The spillway capacity with the water level at the top of the dam is equal to 59,000 cfs or 94% of the test flood.

Download or read book National Program for Inspection of Non Federal Dams Morris Reservoir Dam CT 00473 Naugatuck River Basin Morris Litchfield 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 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Morris Reservoir Dam is an 800 foot long earth embankment dam and has a maximum height of 110 feet. Top width of the dam is 20 feet and appurtenant structures include a concrete spillway, spillway channel and outlet works. The spillway is on the right (west) side of the dam. The visual inspection of Morris Reservoir Dam indicated that the dam is in good condition and is well maintained. The inspection revealed that a surficial erosion channel up to 8 inches in depth is located on the downstream slope approximately 150 feet east of the spillway starting at the third berm down from the crest and extending to the toe. Occasional animal burrows were found on the downstream face of the dam. Loose rock and trees were observed overhanging the west side of the downstream channel. Slight erosion adjacent to the east side of the gate structure was observed. Occasional water observed on the berms is believed to be melt water. The spillway will pass the test flood outflow of 15,575 cfs with a pool elevation of 659.6 feet MSL which is 1 foot below top of dam.

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Program for Inspection of Non Federal Dams Hoadley Pond Dam CT 00090 Naugatuck River Basin Seymour Connecticut 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 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hoadley Pond Dam consists of a stone masonry structure with a maximum height of 19 feet, and an overall length of 145 feet, including a 67 foot long overflow spillway at the right end of the dam. A stone masonry wall with a top width of 4 feet connects the right end of the spillway to the right abutment. To the left of the spillway there is a 6 foot wide stone masonry wall which extends to the left abutment. The outlet works, located to the left of the spillway, consists of a 7 foot by 5 foot opening through this stone masonry wall with an upstream sluice gate discharging to a downstream forebay. The forebay has an 8 foot long overflow spillway and a 16 inch low level outlet that discharges into the river downstream of the dam. A stone masonry wall with a concrete cap is present along the left side of the river downstream of the dam. The dam appears to be in fair condition. The Hoadley Pond Dam has a tributary watershed of 15 square miles, a water surface area of 8 acres, and a spillway capacity of 2,300 cfs. The dam has a hydraulic height of 19 feet and a storage capacity fo 70 Acre-Feet with the water level at the top of the dam.

Download or read book National Program for Inspection of Non Federal Dams Bladens River Dam CT 00602 Naugatuck River Basin Seymour Connecticut 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 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Bladens River Dam consisted of an earth embankment section, a concrete buttress spillway section, a rubble concrete gravity spillway section, and an intake structure for a downstream forebay. The overall length of the dam is approximately 330 feet and the maximum height is 20 feet. The dam was classified 'Small' in size, with a 'Significant' potential hazard. The range for the Test Flood of a 'Small-Significant' dam is the 100-year flood to 1/2 the PMF. A test flood equal to 1/2 the PMF was selected. (Author).

Download or read book National Program for Inspection of Non Federal Dams Fountain Lake Dam CT 00025 Naugatuck River Basin Ansonia Seymour Connecticut 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 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fountain Lake Dam consists of a mortared stone masonry structure with an upstream earth embankment, and an overflow spillway located near the center of the dam. An earth embankment forms the right end of the dam. The dam has a maximum height of 20 feet, and an overall length of 315 feet. The spillway consists of a concrete cap on the stone masonry wall. The crest length is 22.3 feet and the freeboard from spillway crest to the top of the concrete wall is 1.7 feet. The outlet works consist of a 12-inch supply main from an upstream intake structure or gate chamber to a downstream chemical treatment building. There are high level and low level 16-inch intake sluice gates located on the outside of the upstream wall of the gate chamber. The PMF was selected as the Test Flood. The dam has a water shed of only 0.17 square miles. The inflow was calculated to be 360 cfs and the routed outflow was 335 cfs. The spillway has a capacity of 140 cfs or 42 percent of the routed outflow. The Test Flood routed outflow would overtop the dam by 0.3 feet. The condition of the dam at the time of inspection was judged to be fair. Conditions that could affect the integrity of the dam are the seepage existing through the face and downstream of the dam; the erosion of the upstream embankment; the growth of large trees at the toe of the dam; the outlet pipe being controlled by downstream gates instead of upstream sluice gates; and the lack of adequate spillway capacity. (Author).

Download or read book National Program for Inspection of Non Federal Dams Lake Winnemaug Dam CT 00123 Naugatuck River Basin Watertown Connecticut 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 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Winnemaug Dam is an earth embankment approximately 500 feet long with a maximum height of about 15 feet. The upstream slope of the embankment is approximately 1H:1V and the downstream slope is about 1.5H:1V. The top of the dam is about 20 feet wide and it is a paved road. The overflow drop spillway is located about 100 feet from the right abutment and consists of an 18.5-foot long concrete weir, a cascading step section and a 4-foot high by 10-foot wide culvert through the embankment. The original purpose of the dam is unknown; however, the lake is currently used for recreation purposes. The peak test flood inflow for Lake Winnemaug Dam is 3,460 cfs. The routed test flood outflow of 2,010 cfs overtops the dam by about 0.8 feet. The spillway is capable of discharging 770 cfs or about 38 percent of the routed test flood outflow prior to overtopping of the dam. A breach of the dam would result in a 7.8-foot increase in the stream depth (3.8 feet above the channel banks) at the initial downstream damage area. The dam appears to be in poor condition. Numerous structural deficiencies, such as slope failures, seepage, and toe erosion were observed during the visual inspection. The embankment is overgrown with brush and trees and contains a number of rodent holes. The reservoir cannot be drained in an emergency because the outlet pipe control valve is inoperable.

Download or read book National Program for Inspection of Non Federal Dams Thurston Pond Dam CT 00129 Naugatuck River Basin Naugatuck Connecticut 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 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Thurston Pond Dam, also known as the New Dam, consists of an earth embankment with a stone masonry overflow spillway located at the right end of the dam, and outlet works located at the right abutment. The total length of the dam, including the spillway section, is 510 feet and the maximum height is 20 feet. The stone masonry overflow spillway section has an upstream earth embankment of unknown section, a concrete cap and a batter of 6 inches per vertical foot on the downstream face. The outlet works consist of a concrete intake structure with inlet and outlet gates which can discharge water through a 24-inch concrete pipe to downstream locations or through an 18-inch concrete pipe into the stream below the dam. The dam impounds Thurston Pond, which is used for industrial water supply. Based on the visual inspection, the dam is judged to be in poor condition. Features that could affect the future integrity of the dam are continued erosion of the earth embankment, the presence of trees on the dam, the deterioration of the stone masonry overflow spillway, and inadequate spillway capacity to pass the Test Flood Outflow. The spillway capacity is 2,500 cfs or 37 percent of the Test Flood Outflow.

Download or read book National Program for Inspection of Non Federal Dams Wigwam Reservoir Dam CT 00615 Wigwam Reservoir South Dam CT 00676 Naugatuck River Basin Watertown and Thomaston 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 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wigwam Reservoir Dam is a 390 foot cement rubble masonry dam and has a maximum height of 67 feet. The twp width of the dam is 13 feet. Wigwam Reservoir South Dam is another dam on the same reservoir as Wigwam. It is a 476 ft. long earth embankment dam and has a maximum height of 32 feet. The top width of the dam is 15 ft. The visual inspection indicated that the dam is in fair condition. Based on its intermediate size and low hazard classification the test flood is to 1/2 PMF. The test flood would overtop Wigwam by 0.15 feet with 2.4 feet of feet remaining on Wigwam South Dam.

Download or read book National Program for Inspection of Non Federal Dams Plymouth Reservoir Dam CT 00286 Naugatuck River Basin Plymouth Connecticut 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 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plymouth Reservoir Dam, also known as the Thomaston Reservoir Dam, consists of an earth embankment structure with a maximum height of 25 feet and a total length of 730 feet including a 31.7 foot long concrete and stone masonry overflow spillway located 200 feet from the right end of the dam. The outlet works, located to the left of the spillway, consist of a 12-inch supply main and 10-inch low level outlet or blowoff through the dam, and an upstream gatehouse. Based on the visual inspection, the dam is judged to be in fair condition. Features that could affect the future integrity of the dam are downstream seepage, the lack of riprap slope protection on the upstream slope above the waterline and settlement of existing riprap, the unknown working condition of the intake gates, and the downstream location of the control valve on the low level outlet or blowoff. The Test Flood inflow of 600 cfs results in a Test Flood routed outflow of 390 cfs that would just reach the top of the dam. The spillway capacity is 410 cfs or 105 percent of the Test Flood routed outlfow.