Download or read book National Program for Inspection of Non Federal Dams Belleview Lake Dam CT 00642 Naugatuck River Basin Waterbury 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 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Belleview Lake Dam is a 229 foot long rubble masonry gravity dam and has a maximum height of 34 feet, with the spillway located on the right side of the embankment. The visual inspection of Belleview Lake Dam indicated that the dam is in poor condition. There are numerous instances where mortar has been removed from joints. The inspection revealed that extensive seepage occurs across the entire downstream face of the dam. Erosion was observed on the left abutment and seepage was also seen above elevation of the dam crest. Also, at the junction of the left abutment and the downstream face of the dam a 10 foot erosion channel is located which is filled with boulders, trees and rubbish. A similar erosion channel is located on the right side of the dam where seepage water flows down the slope. Numerous trees up to one foot in diameter are found on both abutments and along the toe of the dam. The spillway channel contains debris and trees and erosion has occurred to downstream channel walls. There is no apparent operable outlet to the reservoir. The spillway will discharge 95 cfs or 7% of the test flood with the pool level with the top of the dam. The test flood flow of 1430 cfs will overtop the dam by 1.5 feet. Also, the masonry construction of the dam would probably do some overtopping without significant damage.

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 East Brass Mill Dam CT 00031 Naugatuck River Basin Waterbury 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 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The East Brass Mill Dam, also known as Scovill dam, consists of an earth embankment with a maximum height of 25 feet, a top width of approximately 15 feet, an upstream slope of 2 horizontal to 1 vertical and a downstream slope of 1.7 horizontal to 1 vertical. The dam is 420 feet long, including a 101 foot concrete ogee spillway section located near the left end of the dam. The freeboard from the spillway crest to the top of the left embankment is 5.4 feet. Flashboards, 1.6 feet in height are normally in place, reducing the freeboard to 3.8 feet. The outlet works located to the right of the spillway consist of a control tower or gate house with a high and low. Level inlet which discharges through two 24-inch outlet sluice gates to a 2-Ft.-3- in high by 4-Ft. wide sluiceway that outlet to the downstream face of the spillway. The spillway has a capacity of 4,000 cfs without flashboards and 1,900 cfs with flashboards before overtopping the low point of the dam crest. With the flashboards in place the spillway can pass 11 percent of the Test Flood. Without flashboards the spillway can pass 24 percent of the Test Flood. Without the flashboards in place, the Test Flood would overtop the low point of the dam crest by 3.6 feet.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1984-11 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Program for Inspection of Non Federal Dams West Branch Dam CT 00101 Naugatuck River Basin Torrington 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 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: The West Branch Dam consists of, from right to left, a 100 foot long earth embankment with an intake structure to a downstream canal, a 107 foot long concrete ogee section, and a 160 foot long earth embankment with a concrete core wall. The intake structure to the downstream canal contains two 42-inch sluice gates which discharge to the canal. The canal is separated from the river channel by an earth embankment which contains a 34 foot long auxilliary spillway. This spillway discharges into the river downstream of the dam. In the past, water from the canal would flow through a 36-inch reinforced concrete pipe (RCP) to a downstream manufacturing plant. The low level outlet, or blow-off, consists of a 48-inch RCP located to the left of the main spillway section and is controlled by a manually operated sluice gate. The dam has an overall length of 370 feet and a maximum height of 22 feet. The dam appears to be in fair condition and requires some work. The West Branch Dam has a tributary watershed of 33.3 square miles. The pond has a water surface area of 5.5 acres and a storage capacity with water level at the crest of the dam of 72 Acre-Feet. The main spillway has a capacity of about 8,200 cfs before overtopping the right portion of the dam.

Download or read book National Program for Inspection of Non Federal Dams Echo Lake Dam CT 00124 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 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Echo Lake Dam consists of an earth embankment with a maximum height of 18 feet, a top width of 12 feet and an overall length of 220 feet, including a 32 foot wide bituminous concrete auxiliary spillway located near the left abutment. The main spillway consists of a morning glory (drop inlet) type spillway located near the center of the dam. The outlet works consist of a 12-inch cast iron low level outlet or blowoff controlled by a manually operated gate valve located in the riser pipe of the morning glory type spillway. The dam impounds Echo Lake, which is used for swimming and fishing by residents of Watertown. 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 upstream and downstream slopes, seepage through the dam, and continued deterioration of the auxiliary spillway. The Test Flood inflow is 615 cfs and the Test Flood routed outflow is 510 cfs, overtopping the dam by 0.1 feet. The auxiliary spillway capacity with the water level at the top of the dam is 400 cfs and is equal to 78 percent of the Test Flood routed outflow. The capacity of the morning glory type spillway was neglected because of the potential for clogging.

Download or read book National Program for Inspection of Non Federal Dams Pritchards Pond Dam CT 00033 Naugatuck River Basin Waterbury 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 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pritchards Pond Dam is an embankment dam formed by Pearl Lake Road. It has a total length of 249 feet and a maximum height of 8.7 feet. The exact age of the dam is not known but it is believed to be at least 100 years old. There is a no longer functioning outlet box located on the right side of the dam that presumably controlled a 6-inch cast iron outlet pipe on the downstream side of the dam. There is a bar screen and 4 foot wide overflow spillway located in the center of the dam. This spillway drops down to a 15-inch pipe which outlets at the downstream side of the dam. The downstream side has a stone masonry wall along approximately 90 feet of the dam's length, with varying heights. The dam is owned and operated by the Risdon Manufacturing Company, 2100 South Main Street, Waterbury, Connecticut. Although it once augmented the plant's water supply, it no longer is used for that purpose. Any present uses are strictly recreational. The dam appears in good shape but requires some work. Specifically, this would include developing a functioning outlet works, spillway maintenance and removal of trees on or close to the dam.

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 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 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 Park Pond Dam CT 00632 Dike CT 01708 Naugatuck River Basin Winchester 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 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Park Pond Dam, located at the eastern end of the pond, consists of an earth embankment with a maximum height of 20 feet and a top width which varies from 8 feet to 15 feet. The dam is 420 feet long and has a 19.9 foot concrete spillway at the left end. A diversion channel from an adjacent watershed connects to the spillway approach channel. The impoundment has a maximum storage capacity of 1,100 Acre-Feet. The dike, located at the northwestern end of the pond, consists of an earth embankment with a paved roadway along the crest. The dike has a maximum height of 7 feet, a top width of 21 feet, and a length of about 80 feet. Based on the visual inspection, the dam is judged to be in poor condition and the dike in fair condition. Features which could affect the future integrity of the dam are trees and brush on the embankment; seepage through the embankment; erosion of the downstream slope; deterioration of the spillway approach channel wall and the spillway weir; the accumulation of debris in the spillway and approach and discharge channels; the location of the low level control valve downstream of the dam and lack of erosion protection on the dike. The spillway capacity with water level at the top of the dam and the dike is 310 cfs or 58 percent of the Test Flood routed outflow. The Test Flood would overtop the dam and dike by 0.3 feet.

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 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 Black Rock Pond Dam CT 00633 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 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Black Rock Pond Dam consists of an earth embankment with the outlet works located near the left end of the dam. An overflow spillway is located at a small dike approximately 800 feet to the left of the dam on a separate arm of the pond. The dam has a top width of 10 feet, a maximum height of 20 feet, a total length of 160 feet, an upstream slope of 3 horizontal to 1 vertical, and a downstream slope of 1.6 horizontal to 1 vertical. The outlet works consist of a 12-inch cast iron low level outlet or blowoff pipe controlled by an upstream gate. The overflow spillway consists of a concrete channel 5 feet wide by 5 feet high with slots for flashboards at the upstream end. The dam impounds Black Rock Pond, which is used for swimming and fishing. 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 the downstream seepage, erosion of the crest and slopes, the presence of tree stumps on the slopes, and inadequate spillway capacity. The test flood inflow of 1,200 cfs results in a test flood routed outflow of 1,000 cfs that would overtop the dam and dike by 1.6 feet.

Download or read book National Program for Inspection of Non Federal Dams Whist Pond Dam CT 00102 Naugatuck River Basin Torrington Goshen 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 Whist Pond Dam consists of an earth embankment with a maximum height of 9 feet, and a total length of 1,100 feet including a 17.7 foot long overflow spillway located at the right end of the dam. The outlet works consist of a 12-inch cast iron low level diversion outlet pipe through the dam, controlled by a downstream gate valve. The dam impounds Whist Pond, a storage reservoir for public water supply of the Torrington Water Company. Based on the visual inspection and a review of all available pertinent data, the dam is judged to be in fair condition. The future integrity of the dam can be affected by continued slumping of the rip-rap, roots through the embankment, continued deterioration of the spillway weir and training walls, the lack of a defined spillway discharge channel, and the downstream location of the low level diversion outlet valve. The calculated Test Flood inflow of 175 cfs results in a routed outflow of 65 cfs and 0.4 feet of freeboard. The spillway has a capacity of 100 cfs and is capable of discharging 154 percent of the Test Flood routed outflow.

Download or read book National Program for Inspection of Non Federal Dams Swan Lake Dam CT 00328 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 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Swan Lake Dam consists of an earth embankment with a top width of 25 feet, a maximum height of 16 feet, and an overall length of 325 feet including a 25 foot long overflow spillway located near the center of the dam. The upstream edge of the dam crest is protected by a precast concrete block wall. The outlet works located to the left of the spillway consist of a concrete intake structure which discharges through a 24-inch reinforced concrete low level outlet or blowoff pipe at the downstream toe of the dam. The dam impounds Swan Lake which is used for recreational purposes by the surrounding property owners. 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 downstream toe; missing mortar and voids in the downstream spillway slope; the condition of the downstream channel; the presence of trees and stumps on the downstream slope; erosion and settlement behind the upstream concrete block wall; erosion on the downstream slope; and inadequate spillway capacity. The test flood inflow of 1,042 cfs results in a test flood routed outflow of 860 cfs that would overtop the dam by 0.7 feet. The spillway capacity with water level at top of dam is about 245 cfs and is equal to 28 percent of the test flood routed outflow.

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.