National Program for Inspection of Non-Federal Dams. Success Lake Dam (CT 00079), Connecticut Coastal Basin, Bridgeport, 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. Success Lake Dam (CT 00079), Connecticut Coastal Basin, Bridgeport, Connecticut. Phase I Inspection Report PDF full book. Access full book title National Program for Inspection of Non-Federal Dams. Success Lake Dam (CT 00079), Connecticut Coastal Basin, Bridgeport, 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 : 54
Get Book Here
Book Description
The Success Lake Dam, constructed in 1875, is a 132-foot-long, 17-foot-high structure composed of two earthfill embankments and a central 33-foot-long broad crested spillway. The original timber spillway decking has since been capped with concrete. Flow over the spillway is channeled through five 4-foot-wide, 2-foot-high openings, and one 3.3-foot-wide, 2-foot-high, opening formed by the bridge piers. Two cast ion conduits pass through the earthfill embankment at the right abutment of the dam and provide additional outlets from the impoundment. Visual inspection of the site indicated that the dam is in poor condition. The inspection revealed the following: deterioration of the vertical downstream face of the spillway, cracked and missing portions of the concrete spillway and downstream interfaces of the spillway and abutments, exposed aggregate on the concrete spillway cap, seepage along the toe of the left embankment has resulted in a 20-foot by 30-foot marshy area approximately 40 feet from the dam, and a potentially inoperable low-level outlet.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 54
Get Book Here
Book Description
The Success Lake Dam, constructed in 1875, is a 132-foot-long, 17-foot-high structure composed of two earthfill embankments and a central 33-foot-long broad crested spillway. The original timber spillway decking has since been capped with concrete. Flow over the spillway is channeled through five 4-foot-wide, 2-foot-high openings, and one 3.3-foot-wide, 2-foot-high, opening formed by the bridge piers. Two cast ion conduits pass through the earthfill embankment at the right abutment of the dam and provide additional outlets from the impoundment. Visual inspection of the site indicated that the dam is in poor condition. The inspection revealed the following: deterioration of the vertical downstream face of the spillway, cracked and missing portions of the concrete spillway and downstream interfaces of the spillway and abutments, exposed aggregate on the concrete spillway cap, seepage along the toe of the left embankment has resulted in a 20-foot by 30-foot marshy area approximately 40 feet from the dam, and a potentially inoperable low-level outlet.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 91
Get Book Here
Book Description
The dam is an earthfill structure with an upstream masonry and concrete retaining wall. The top of the dam is approximately 80 feet in width at the spillway and 20 feet above the streambed of the Farm River Diversion. The top of the dam is approximately 100 feet long along the upstream edge of the crest and approximately 200 feet long along the downstream edge of the crest. U.S. Route 1, a four lane highway, runs along the top of the dam. The spillway consists of a 10-foot-wide by 4.2-foot-high opening in the upstream masonry wall for the enclosed concrete ogee weir which feeds a 36 x 58-in. corrugated metal arch culvert through the embankment. The arch culvert connects to a junction box, as does the 24-inch low level outlet pipe, which runs from a concrete intake chamber 10 feet upstream of the upstream face of the dam. A 48-inch reinforced concrete pipe discharges from the junction box to the downstream streambed at the toe of the dam. Based upon the visual inspection at the site and past performance, the dam is judged to be in fair condition. No evidence of structural instability was observed, however surface sloughing and erosion of the downstream embankment slope was noted. Peak inflow to the reservoir is 7450 cfs; peak outflow is 1900 cfs with the dam overtopped 1.9 feet. Based on our hydraulic computations, the spillway capacity is 220 cfs, which is equivalent to 12% of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 94
Get Book Here
Book Description
Pataguanset Lake Dam is a 210 foot long earthfill and stone masonry structure. The left half of the dam is an earth embankment with a 10 foot crest width and a crest elevation of 68.0 NGVD. The center section of the dam is an earthfill emergency spillway with sheet piling on the upstream face and a 20 foot wide concrete paved crest. The crest elevation of this section is 65.2 NGVD. The spillway is a broadcrested weir, 15 feet long, with a crest elevation 62.7 NGVD. The outlet consists of a 6 foot wide rectangular concrete channel with stop log controls and an invert of 60.2 NGVD. The maximum height of the dam is 11.6 feet. The dam has a maximum impoundment capacity of 950 acre-feet at the top of dam elevation of 68.0 NGVD and used for recreation. The test flood has a routed outflow discharge equal to 1,800 CFS and would overtop the dam by 0.3 feet. The maximum spillway outlet, and emergency spillway capacity is equal to 1,580 CFS which represents 88% of the test flood outflow. Based on a visual inspection at the site, the dam is considered to be in FAIR condition. It is recommended that the left training wall of the outlet channel be repaired or replaced immediately upon receipt of this report.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 131
Get Book Here
Book Description
The Lake Naraneka Dam, constructed in 1937 for recreational purposes, is a 156-foot-long and 18-foot-high concrete gravity dam which is arched in plan. The dam is 4 feet wide at the crest; has a 0.1H:1V sloped upstream face; and a downstream face which is inclined at approximately 0.65 H:1V. The spillway is incorporated into the left side of the dam. The 11-foot-long spillway, located about 30 feet from the left abutment, discharges into a 60-foot-long stone paved channel. Discharge from the site may also pass through the manually controlled 14-inch diameter low level outlet of the 2-inch and 8-inch diameter conduits that supply and drain the small masonry pool at the downstream toe of the dam. The visual inspection of the dam indicated that the structure is in fair condition. Seepage and wet areas were observed on the downstream face of the dam. Extensive efflorescence, cracking and spalling of the concrete was noted at many areas on top, upstream, and downstream faces of the dam. The Lake Naraneka Dam has a top of dam storage capacity of 675 acre-feet (ac-ft) and is approximately 18 feet in height. The capacity of the spillway, with the water surface at the top of the dam, is 215 cfs or 43 percent of the routed test flood outflow. As a result, the dam will be overtopped by 0.7 feet.
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 1152
Get Book Here
Book Description
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 96
Get Book Here
Book Description
Being one of two structures impounding water at the Farm Brook Site 2 Reservoir (See Farm Brook Site 2A Dam CT-01546 Report) the Farm Brook Site 2B Dam consists of an earth embankment approximately 1,000 ft. long with a top width of 14 ft. and a maximum height of 28 ft. The low level outlet for the project is the principal spillway which consists of a three-stage reinforced concrete intake riser, a 30-inch reinforced concrete pipe and a 16 ft. long impact basin. In addition to the low-level outlet, there is a 90 ft. wide, grassed trapezoidal channel at the east end of the dam serving as the emergency spillway. Based on the visual inspection and review of available plans and reports, Farm Brook Site 2B Dam is judged to be in good condition, with the exception of the seepage observed flowing from the 8-in. outlet at the west side of the impact basin. Since the reservoir level was very low at the time of inspection, any possible embankment seepage at the dam could not be ascertained. With the water level at the top of the site 2B Dam, the maximum spillway capacity is 3800 cfs which is 205% of its routed outflow 1850 cfs. The storage capacity of the reservoir at the top of the dam is 1190 ac. ft.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 77
Get Book Here
Book Description
This 26 foot high water supply facility dam consists of two main sections. The upstream section is an earthfill dam built in 1862. The downstream part, built in 1900, is a stone masonry gravity section. The area between the two sections was filled in 1900 with a well-compacted clayey soil adjacent to the older upstream fill material. The spillway is a 21.5' foot long broad-crested stone masonry weir discharging to a concrete and stone channel which leads to a concrete arch culvert under Connecticut Route 34 immediately downstream of the dam. The outlets consist of a 16 inch supply main and a 10 inch low level outlet, both of which are gated on the downstream side of the dam, the 16 inch pipe at a gatehouse at the toe of the dam, and the 10 inch by a gate in a manhole at the toe of the dam. In addition there is a 20 inch pipe through the dam which carriers water from the upper Maltby Lake No. 2 to the downstream gatehouse. From the gatehouse, a water line runs to the filtration plant on the opposite side (southeast) of Route 34. Based upon the visual inspection at the site and past performance, the dam appears to be in good condition. No evidence of instability was observed in the downstream masonry section, the upstream earthfill section, or any appurtenances. The test flood is equivalent to one-half the Probable Maximum Flood (PMF). Peak inflow to the reservoir is 1450 cfs; peak outflow is 1220 cfs with the dam overtopped 0.6 feet. Based upon our hydraulic computations, the spillway capacity is 520 cfs without the swale overflow, which is equivalent to 43% of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
Get Book Here
Book Description
The 250-foot-long, 21-foot-high homogeneous earthfill embankment is 12 feet wide at the top and has 3:1 upstream and downstream slopes. Riprap has been provided on the upstream slope to an elevation 2 feet above the wildlife pool surface. The principal spillway is composed of a reinforced concrete drop inlet structure and a 30-inch-diameter conduit through the dam. The crest of the drop inlet riser is at elevation 577.0 NGVD and has a total crest length of 15 feet. There is an ungated low-level outlet on the upstream wall of the riser. This 1 ft. - 10 in. by 1 ft. - 4 in. outlet has an open intake which may be closed, using stoplogs, thus diverting the flow over the weirs on the sides of the intake. The rock cut emergency spillway on the right abutment is 15 feet wide and approximately 245 feet long with a crest elevation of 578.0. The visual inspection of the dam indicated that the structure is in good condition. No indications of seepage through the dam were noted nor was seepage observed at the abutments or along the concrete spillway outlet pipe. There was no discharge from the 6-inch-diameter toe drain outlets during the inspection. The test flood outflow is approximately 1,240 cfs; and the combined capacity of the spillways, with the water surface at the top of the dam, is 1,600 cfs or 129 percent of the routed test flood outflow.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
Get Book Here
Book Description
Farm Brook Site 2A Dam, one of two dams (See Farm Brook Site 2B Dam CT-01547 Report) impounding water at the Site 2 Reservoir consists of an earth embankment approximately 440 ft. long with top width of 14 ft. and a maximum height of 29 ft. The low level outlet for the project is the principal spillway which consists of a three stage reinforced concrete intake riser, a 30-inch reinforced concrete pipe and a 16 ft. long impact basin. In addition to the low-level outlet, there is a 210 ft. wide, grassed trapezoidal channel at the dam's west end serving as the emergency spillway. Based on the visual inspection and review of available plans and reports, Farm Brook Site 2A Dam is judged to be in good condition; however, since the reservoir did not contain much impoundment at the time of inspection, any possible seepage conditions at the dam could not be ascertained. With the water level at the top of the Site 2A dam the maximum spillway capacity is 8700 cfs which is 210% of the Site 2A routed outflow. The storage capacity of the reservoir at the top of the dam is 1190 ac. ft.
Author: CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV.
Publisher:
ISBN:
Category :
Languages : en
Pages : 95
Get Book Here
Book Description
The 560 foot long dam is an earth embankment with a masonry and concrete corewall. The top of the dam is 10 feet wide and, at elevation 299, is roughly 29 feet above the streambed of an unnamed tributary to the Menunketesuck River. Upstream and downstream slopes are at two horizontal to one vertical and three horizontal to one vertical inclinations, respectively. A stone filter and underdrain runs along the downstream toe of the dam on both sides of the spillway. The 40 foot wide spillway may be described as a broadcrested concrete weir of trapezoidal cross-section. The concrete spillway wingwalls were extended vertically and horizontally by means of gabions when the downstream slope was flattened in 1973. The channel bottom below the concrete spillway apron is lined with gabions, as are the channel sides. There is also a 16 inch diameter low level outlet pipe and a 6 inch diameter low level outlet pipe through the dam from the concrete intake structure to the downstream channel. There is also a 16 inch diameter low level outlet pipe which runs directly from the reservoir through the intake structure and dam to the downstream channel. Based upon the visual inspection at the site and its past performance, the dam appears to be in good condition. No evidence of instability was observed in the dam or it appurtences. There are some areas of seepage requiring monitoring. Based upon our hydraulics computations, the spillway capacity is 920 cubic feet per second (cfs), which is equivalent to 36 percent of the routed Test Flood outflow.
