Download or read book National Program for Inspection of Non Federal Dams Ellis Dam CT 00478 Thames River Basin Stafford 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: Ellis Dam consists of a 490 foot long earth embankment and a 150 foot wide grassed emergency spillway. The outlet consists of a concrete riser with 6 foot long weirs on each side and a 24-inch reinforced concrete outlet pipe discharging to Ellis Brook at the toe of dam. Maximum height of dam is 40 feet with a maximum storage capacity of 824 acre-feet at crest elevation. Based on the visual inspection, Ellis Dam appears to be in good condition. There was some deterioration of the concrete on the top of the principal spillway riser, but repairs had been made. Also, there was some settlement in what appears to be a spoil area used during construction. The plans show a slide gate at the inlet to the principal spillway buy only some of the fittings are in place. Maintenance practices at Ellis Dam appear to be good. Soil Conservation Service design for this dam used a rainfall of 15 inches and a runoff of 13.5 inches for the emergency spillway design. The design flood results in a peak inflow of 4985 cfs and a peak outflow of 2396 cfs with a maximum water surface elevation 2.0 feet below the crest of dam, which was used as the test flood.

Download or read book National Program for Inspection of Non Federal Dams Ellithorpe Dam CT 00481 Thames River Basin Stafford 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 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ellithorpe Dam consists of a 4,250 foot long earth embankment and a 200 foot wide grassed emergency spillway. The outlet consists of a concrete riser with 23 foot long weirs and a 48-inch reinforced concrete outlet pipe discharging to Middle River at the toe of dam. Based on the visual inspection, Ellithorpe Dam appears to be in good condition. There are several recreational vehicles paths on the slopes with some erosion taking place. Also, there are numerous rodent burrows on the upstream slope. Maintenance practices at Ellithorpe Dam appear to be good. Based on Corps of Engineers guidelines, the PMF was calculated to be 16,900 cfs inflow, with the outflow 10,800 cfs at an elevation of 591.6, which is 0.6 feet over the top of dam. This flow was used as the test flood.

Download or read book National Program for Inspection of Non Federal Dams Whitney Dam CT 00477 Thames River Basin Stafford 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: Whitney Dam consists of a 1,400 foot long earth embankment and a 120 foot wide grassed emergency spillway. The outlet consists of a concrete riser with 7.5 foot long weirs on each side and a 30-inch reinforced concrete outlet pipe discharging into Patten Brook at the toe of dam. Maximum height of dam is 52 feet with a maximum storage capacity of 1,960 acre-feet. Based on the visual inspection, Whitney dam appears to be in good condition. Only one small cedar tree is growing on the embankment and there is evidence of recreational vehicles climbing the embankment in three locations. The rodent screen on one foundation drain outlet is partially missing and the slide gate stem at the principal spillway outlet is bent and appears to be inoperative. Calculations by the Soil Conservation Service show a peak inflow of 6,500 cfs. and a peak outflow of 1,930 cfs. with a maximum water surface elevation 2.0 feet below the crest of dam, which was used as the test flood.

Download or read book National Program for Inspection of Non Federal Dams Shenipsit Dam CT 00482 Thames River Basin Stafford 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 dam, completed in 1961, is an earth embankment approximately 390 feet in length with an emergency spillway at its left with end. It is a flood control project approximately 28.5 feet in height and capable of impounding approximately 520 acre-feet of water. The principal spillway is a drop inlet type structure consisting of a reinforced concrete riser with a 24 inch diameter reinforced concrete outlet pipe through the dam. The grass-bottomed emergency spillway channel is cut into natural ground at the left end of the dam and has a crest length of 125 feet. The top and slopes of the dam are grass covered, with a filter drain at the toe of the downstream slope. Based upon the visual inspection and past performance, the dam is judged to be in good condition. No evidence of instability was observed in the project. There are some remedial measures, such as filling of large holes in the 'waste areas' adjacent to the dam, reestablishment of greasy vegetation in the vehicle tracks on the top of the dam, and institution of a biennial inspection program, which require attention. The spillway capacity with the pond level to the top of the dam is 4700 cfs, which is equivalent to 1300% of the routed test flood outflow.

Download or read book National Program for Inspection of Non Federal Dams Lake Mark Dam CT 00337 Thames River Basin Stafford 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 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam, substantially completed in 1957 and certificate of approval dated April 27, 1972, consists of an earth embankment with a concrete corewall and a concrete spillway. The embankment is 580 feet long, has a maximum storage capacity of 185 acre-feet, and is 22 feet in height above the streambed of Diamond Ledge Brook at the toe of the dam. The top of the dam (elevation 21.0) is 20 feet wide and 6 feet above the spillway crest. The upstream slope and top of the dam have a sod cover except at the left end where there is a sandy beach area. The spillway consists of a 10 foot long and 3 foot wide broad-crested concrete weir and a rectangular chute (fish ladder) which extends 65 feet to the toe of the dam. The low-level outlet facility is an 8 inch corrugated metal pipe which is encased in concrete and located to the left of the spillway and gated at the downstream slope. Based upon the visual inspection at the site and past performance of the dam, the project is judged to be in fair condition. There are items requiring maintenance and monitoring such as seepage along the toe of the dam, cracking along the joints of the spillway chute, and the lack of proper slope protection. Also, the fill being dumped along the downstream slope should be graded to a lesser slope and slope protection placed. The spillway capacity with the lake level to the top of the dam is 440 cfs, which is 81% of the routed test flood outflow.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1984 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Program for Inspection of Non Federal Dams Springs Pond Dam CT 00342 Thames River Basin Stafford 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 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Springs Pond Dam consists of a 77 foot stone masonry spillway and a 73 foot earth embankment with vertical downstream stone masonry wall. At top of dam elevation, the dam impounds 63 acre-feet. The outlet works consist of a 30x42-in stone conduit controlled by a wood slide gate. Under normal conditions, the entire flow, of Middle River discharges over the spillway. This dam has a maximum height of 14.4 feet with the top of dam 4.4 feet above the spillway crest and is classified as small in size with a hazard classification of significant. There are no available records to indicate when construction of the dam took place or the original purpose of the dam. The visual inspection indicates that the water was used for either power or process water at some time but is no longer used. Based upon the visual inspection, the dam is in fair condition with some seepage from the downstream face and some deterioration of the south abutment and approach channel for the outlet works. Some trees and brush are growing on the upstream side of the embankment. There are two outlet structures, neither of which is operable. An outlet at the north end of the dam was originally for control of water for downstream use. There no longer is any apparent need for this outlet. The southerly outlet structure is for use in drawing down the pool. The test flood results in the dam being overtopped by 3.1 feet to an elevation of 487.5 NGVD. At top of dam elevation, the spillway capacity is 2,300 cfs, which is 34 percent of the test flood flow.

Download or read book National Program for Inspection of Non Federal Dams Riverside Pond Dam CT 00336 Thames River Basin Stafford Connecticut Phase I Inspection Program 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 dam at Riverside Pond is a stone-faced earth embankment dam and is used to supply process water to the adjacent factory located just downstream of the dam. the dam has a height of 21 feet and is approximately 180 feet in length (including the spillway). A single span two lane bridge spans the spillway crest. The spillway is a stone masonry/concrete cap, uncontrolled broad crested weir, 64 feet in length. There are two outlet works, one located to the right of the spillway and the other at the left of the spillway. the right outlet works is a gated underground sluiceway that supplies process water to the adjacent mill. Flows at this outlet pass through the mill and discharge through the side wall of the building foundation and return to Furnace Brook. The left outlet works is also gated and is a 42 inch diameter riveted steel plate pipe through the left dam embankment. Based on the visual inspection at the site, the dam is considered to be in POOR condition. Deficiencies observed include: cracks and voids in the upstream masonry face vegetation growing in the upstream and downstream masonry walls, cracks and bulging of the downstream face of the dam, leakage through the left intake gates and deterioration of the outlet pipe, and seepage along the downstream face. Assuming the pool elevation at the top of the dam, the spillway can pass a flow of 4,435 CFS, which represents only 69 percent of the test flood outflow.

Download or read book National Program for Inspection of Non Federal Dams Warren Pond Dam CT 00335 Thames River Basin Stafford 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 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam built around 1852, has a total length of approximately 293 feet, consisting of a 113 foot long, broad-crested masonry spillway between two 90 foot long embankments with masonry downstream faces. The top of the embankments, at elevation 519.0, are approximately 14 feet wide and 3 feet above the spillway crest. The dam is 22 feet in height above the streambed of Furnace Brook and, with the pond level to the top of the dam, impounds approximately 105 acre-feet of water. At the right end of the dam is a canal leading to the Warren Corporation mill downstream. The inlet to the canal is a 6 foot wide by 5.5 foot deep masonry arch culvert. Based upon the visual inspection at the site and past performance, the project is, judged to be in fair condition. No evidence of instability of the project was observed. However, there are items which require maintenance and/or evaluation, such as deteriorated masonry at several locations on the dam and the absence of a low-level outlet for the dam. The spillway capacity, with the reservoir level to the top of the dam, is 1,900 cfs, which is equivalent to 16% of the routed test flood outflow.

Download or read book National Program for Inspection of Non Federal Dams Packers Pond Dam CT 00578 Thames River Basin Plainfield Connecticut Phase 1 Inspection Report written by CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV. and published by . This book was released on 1980 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book National Program for Inspection of Non Federal Dams Bradway Dam CT 00480 Thames River Basin Stafford 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 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bradway Dam consists of a 330 foot long earth embankment and a 140 foot wide grassed natural channel used as an emergency spillway. The outlet consists of a concrete riser with 6 foot long weirs on each side and a 24-inch reinforced concrete outlet pipe discharging to an unnamed streams at the toe of dam. This dam and five others constructed during the same period control flooding in Stafford Springs from Middle River and Furnace Brook. The maximum height of dam is 29 feet with a maximum storage capacity of 1,050 acre-feet at crest elevation. The Soil Conservation Service design for this dam used a rainfall of 15 inches and a runoff of 14 inches for the emergency spillway design. This design flood is more than adequate for Bradway Dam.

Download or read book National Program for Inspection of Non Federal Dams Pomeroy Dam CT 00479 Thames River Basin Stafford 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 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pomeroy Dam consists of a 535 foot long earth embankment and a 150 wide grassed emergency spillway. The outlet consists of a concrete riser with 6 foot long weirs on each side and a 24-inch reinforced concrete outlet pipe discharging to McIntyres Brook at the toe of dam. Maximum height of dam is 37 feet with a maximum storage capacity of 710 acre-feet at crest elevation. Based on the visual inspection, Pomeroy Dam appears to be in good condition. There is one small tree on the downstream slope and a rodent burrow at the end of the emergency spillway channel. The plans show a slide gate at the inlet to the principal spillway but it was not installed. Maintenance practices at Pomeroy Dam appear to be good.

Download or read book National Program for Inspection of Non Federal Dams Yantic River Dam CT 00654 Thames River Basin Bozrah 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 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Yantic River Dam is an earth embankment with a gravity overflow section. They have a combined length of approximately 323 feet and a maximum height of 18.2 feet. A spillway is located on the northern side of the dam and is approximately 128 feet long. The concrete and masonry spillway is 4 feet lower than the top of the dam. A gate structure and sluiceway near the northern end of the dam supplies water to a downstream factory. There is a 24 inch low-level discharge pipe that passes through the base of the dam at the southern end of the spillway. The pipe is controlled by a gate on the upstream side of the dam and this gate is operable. The drainage area is 39.4 square miles and the reservoir has approximately 77 acre-feet of storage capacity. The assessment of the dam is based on available information, visual inspection and hydraulic/hydrologic computations. The dam is judged to be in FAIR condition with several areas that require attention. These areas include: seepage through the earth embankment and the northern spillway training wall, settlement behind the spillway training wall, cracking and spalling of the sluiceway gate structure and brush and trees on the embankments and along the toe of the dam. The spillway capacity at the top of dam is 2,700 cfs or 44 percent of the test flood outflow. The test flood outflow will overtop the dam by approximately 2 feet.

Download or read book National Program for Inspection of Non Federal Dams Mono Pond Dam CT 00258 Thames River Basin Columbia 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 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book National Program for Inspection of Non Federal Dams Versailles Pond Dam CT 00472 Thames River Basin Sprague 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 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam, built around 1920, has a total length of approximately 400 feet, consisting of a 184 foot long board-crested masonry spillway, a 190 foot long earth embankment, and a 27 foot long sluiceway. The top of the embankment, at elevation 88.7, is approximately 20 feet wide, 8.7 feet above the spillway crest, and 23 feet above the streambed of the Little River. With the pond level to the top of the dam, the pond impounds approximately 1000 acre-feet of water. The sluiceway at the left end of the dam leads to abandoned factory buildings about 400 feet from the dam. The intake to the sluiceway is a wood bulkhead, which contains 5 gates. Based upon the visual inspection at the site and past performance, the project is judged to be in poor condition. No evidence of instability of the project was observed. However, there are items which require maintenance, such as the dense vegetation on the embankment and the inoperable sluice gates. The spillway capacity with the pond level to the top of the dam is 13,000 cfs, which is equivalent to 108% of the routed test flood outflow.

Download or read book National Program for Inspection of Non Federal Dams Andover Lake Dam CT 00624 Thames River Basin Andover 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 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Andover Lake Dam is an earth embankment dam with a concrete parapet wall along most of its crest. The dam is about 454 ft. long and 20 ft. high. To the right of the dam the reservoir rim has a saddle whose low point is 1.25 ft. below the level of the parapet. A 39 ft. wide concrete spillway with a 7 ft. wide stop-log notch is located about 50 ft. from the left abutment. A 24 in. dia. outlet pipe through the embankment is controlled by a gate valve, which at the time of the inspection was completely submerged. The dam is judged to be in generally fair condition. At the time of the inspection vegetative growth had invaded the embankment, there were cracks in the abutment walls of the spillway, and the spillway's discharge channel was encroaching on the toe of the dam embankment for a distance of about 150 ft. The discharge channel for the low level outlet was in need of repair and had an area of persistent seepage. The top of the embankment was lower than the top of the concrete parapet wall. There was some displacement of riprap on the upstream slope and areas of local erosion on the downstream slope. The spillway can pass about 280 cfs or about 9 percent of the routed test flood outflow without overtopping the low point near the right abutment.