Download or read book National Program for Inspection of Non Federal Dams Old Grist Mill Pond Dam MA 00668 Blackstone River Basin Upton 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 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is an earthfill embankment 90 feet long and 24 feet high with concrete headwalls on the upstream and downstream slopes. There is a concrete outlet structure located on the upstream face of the dam. The structure contains three weirs and a grated outlet. The following are visible signs of distress which indicate a potential hazard at the site: erosion and spalling of the concrete on the outlet structure; slight seepage at the top of the outlet gate; slight seepage at the toe of the dam; a small tree growing at the toe of the dam; erosion of the embankment slopes near the west abutment; accumulation of rock debris in the floor of the box culvert; and minor efflorescence, cracking and seepage in the walls of the box culvert. In addition, the channel downstream of the dam contains heavy overgrowth of trees and brush, an accumulation of rock and soil 2 feet above the floor of the box culvert, and pieces of rock fallen from the side walls. The outlet structure can only discharge 29 percent of the test flood before overtopping the dam occurs. In the event flow overtops the dam, complete failure of the dam is unlikely to occur. The highway pavement and concrete headwalls will serve to protect the dam under flood conditions. However, erosion of the dam could occur, resulting in a breach and partial failure of the dam.

Download or read book National Program for Inspection of Non Federal Dams Cook Pond Dam MA 00123 Blackstone River Basin Worcester 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 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Program for Inspection of Non Federal Dams Singletary Pond Dam MA 00144 Blackstone River Basin Millbury 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 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Program for Inspection of Non Federal Dams Dorothy Pond Dam MA 00146 Blackstone River Basin Millbury 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 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dorothy Pond Dam which was constructed around 1825 is an earthfill dam with an upstream mortared masonry headwall. The dam has a maximum height of 13 feet and is approximately 200 feet long. The outlet conduit is a 24-inch diameter cast-iron pipe controlled by a rack and pinion operated wooden slide gate. The spillway, which is located 180 feet west and from the dam, consists of a mortared stone paved channel that discharges into an earth channel. Generally, the dam is considered to be in fair condition. However, there are several visible signs of distress which indicate a potential hazard at this site: slight-to-moderate seepage at the downstream toe of the dam, erosion on the upstream headwall and face of the dam, large trees on the dam crest, and accumulation of debris in the spillway channel. Hydraulic analyses indicate that the existing spillway can discharge a flow of 264 cubic feet per second (cfs) at Elevation (El) 396 which is the top of the dam. An inflow test flood of 2,850 cfs (one-half of the probable maximum flood) will overtop the main dam by about 2.0 feet.

Download or read book National Program for Inspection of Non Federal Dams Quinsigamond Pond Dam MA 00139 Blackstone River Basin Worcester 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 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quinsigamond Pond Dam is an earthfill dam with an arched, stone masonry spillway. The dam and spillway is about 240 feet long and 18 feet high. The dam is considered to be in fair condition. In addition, the dam has been classified in the 'high' hazard category. Based on size and hazard classification, the test flood is 1/2 the PMF.

Download or read book National Program for Inspection of Non Federal Dams Williams Mill Pond Dam MA 00121 Blackstone River Basin Worcester 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 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Williams Mill Pond Dam is a 360-foot long, 14-foot high earthfill dam. The original dam at this site, which was constructed around 1888, was partly rebuilt after being washed out in 1923. There is no other information available on the construction of this dam. The stone masonry spillway has a sharp-crested concrete weir and a stepped stone cascade. The 47-foot long spillway crest has been breached in a 20.2-foot section near the right training wall. The crest is at Elevation (EL) 505.4 in the breached section and 508.0 in the unbreached section. There is no apparent outlet at this dam. The dam is in poor condition. The following are visible signs of distress that could indicate a potential hazard at the site: breached section of the spillway; lack of a low level outlet; erosion at several locations along the embankment and down the left bank of the discharge channel; possible seepage through the left embankment; dense growth of trees and brush on both slopes and on the spillway crest; loose and displaced stone blocks on the spillway, the side walls, and the apron of the cascade; erosion and unidentified flow from beneath the concrete retaining wall; and accumulation of branches and debris in the downstream channel. An outflow test flood of 4,170 cfs (one-fourth the estimated probable maximum flood) will overtop the dam by a maximum of 1.8 feet. The spillway can discharge 45 percent of the outflow test flood.

Download or read book National Program for Inspection of Non Federal Dams Pondville Dam MA 00197 Blackstone River Basin Auburn 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 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is about 141 ft. long and 12.5 ft. high. The dam was judged to be in poor condition. It is small in size and has a hazard potential of high. A breach of the dam would cause minor flooding of several commercial buildings, a post office building, several commercial buildings, a post office building, several roadways and a railroad.

Download or read book National Program for Inspection of Non Federal Dams Brierly Pond Dam MA 00143 Blackstone River Basin Millbury 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 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The following visible signs of distress were noted at the site: erosion and insufficient riprap on the upstream face of the dam; the lack of permanently-installed equipment for opening the gate at the low-level intake; leakage around the closed gate; seepage in the tailrace downstream of the dam; and overgrowth of vegetation on the dam, the dike, and over the outlet channel. An outflow test flood of 2,560 cfs (derived from one-half the probable maximum flood) will overtop the dam by about 2.4 feet. The outlet even when fully opened is inadequate as a spillway because it can discharge only 7 percent of the test flood.

Download or read book National Program for Inspection of Non Federal Dams Ramshorn Pond Dam MA 00145 Blackstone River Basin Millbury 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 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ramshorn Pond Dam which was originally constructed around 1825 is an earthfill dam. The dam has a maximum height of 25 feet and is approximately 560 feet long. The outlet conduit is a 24-inch diameter pipe controlled by a rack and pinion operated gate valve. The spillway consists of a mortared stone paved channel that discharges into an earth channel. Wooden flashboards 19 inches high are located on the spillway cost. Generally, the dam is considered to be in fair condition. However, there are several visible signs of distress which indicate a potential hazard at this site: slight seepage at the downstream toe of the dam, a pool of water on the downstream toe, erosion on the upstream face and downstream face of the dam, small trees and brush on the dam, minor accumulation of debris in the spillway channel, slumped riprap on the upstream face, leakage of the gate valve stem, a large animal burrow and numerous chipmunk holes on the dam face. An outflow test flood (full PMF) of 2,670 cfs would overtop the dam by 1.4 feet. The spillway without flashborads can discharge 31 percent of the test outflow. With the flashboards in place, the spillway can discharge 540 cfs, which is 18 percent of the test outflow.

Download or read book National Program for Inspection of Non Federal Dams Stoneville Pond Dam MA 00126 Blackstone River Basin Auburn 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 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stoneville Pond Dam is an earthfill dam with a concrete ogee spillway. The dam has a maximum height of 20 feet and is approximately 290 feet long. It is considered to be in fair condition. An outflow of 9.850 cfs (1/2 the PMF) wil overtop the bridge by about 3.4 feet. The dam is considered to have a 'high' hazard potential.

Download or read book National Program for Inspection of Non Federal Dams Patch Reservoir Dam MA 00122 Blackstone River Basin Worcester 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 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Patch Reservoir Dam consists of a stone masonry spillway and earth dike. The spillway is about 6 feet high and 70 feet long. The earth dike has a maximum height of 11 feet and is about 200 feet long. Generally, the dike and spillway are considered to be in fair condition. Based on size and hazard classification, the test flood is considered to be one half of the PMF.

Download or read book National Program for Inspection of Non Federal Dams Curtis Ponds Dam MA 00140 Blackstone River Basin Worcester 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 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Curtis Ponds Dam is a 420 foot long, 14 foot high earthfill dam. The dam is in fair condition. It has been placed in 'significant' hazard category for the classification of hazard potential. The spillway can discharge 27 percent of the outflow test flood (1/2 the PMF) which is 9,500 cfs with a pond level at EL 481.0. (Author).

Download or read book National Program for Inspection of Non Federal Dams Wildwood Lake Dam MA 00667 Blackstone River Basin Upton 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 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is an earthfill dam with a concrete spillway located at the center of the dam. There are deficiencies which must be corrected to assure the continued performance of the dam. It is small in size with a hazard potential of significant. (Author).

Download or read book National Program for Inspection of Non Federal Dams Snows Mill Pond Dam MA 00878 Merrimack River Basin Fitchburg 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 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam consists of an earth dike, about 250 ft. long on the left bank of the river, and a z-shaped stone masonry spillway about 212 ft. long. The dam itself is generally in good condition. There was no evidence of settlement, lateral movement or other signs of structural failure. It is small in size with a high hazard potential.

Download or read book National Program for Inspection of Non Federal Dams Bell Pond Dam MA 00148 Blackstone River Basin Worcester 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 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bell Pond is located in a depression on top of a bedrock hill. An earthfill dam built some time prior to 1843, it is located on the south shore of the pond. The dam is 230 feet long and has a maximum height of 3.7 feet. At the northwest corner of the pond is acatch basin with an outlet pipe at invert EL 668.8. This serves as the only spillway at the site. Generally, the dam is in fair condition. The dam is considered to be a hazard because of the lack of a low-level regulating outlet and the accumulation of debris at the upstream end of the existing catch basin outlet. The following are other signs of distress observed at the site: slight seepage through the embankment of the dam along the downstream toe, a dense growth of trees and brush on the downstream slope of the dam, and deteriorated concrete and accumulated debris in the stormwater drainage basin below the erosion control channels. Hydraulic analyses indicate that the outlet pipe at the catch basin can discharge an estimated 20 cubic feet per second (cfs) when the pond level is at El 670.0, which is the low point on the crest of the dam. A test flood outflow (one-half probable maximum flood (PMF)) of 36 cfs will overtop the dam by a maximum of 0.2 feet. The outlet pipe can discharge about 56 percent of the test flood outflow.

Download or read book National Program for Inspection of Non Federal Dams Fisherville Pond Dam MA 00577 Blackstone River Basin Grafton 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 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fisherville Pond Dam is an earthfill dam with a stone masonry, narrow crested spillway. The dam, which was constructed in about 1882, has a total length of 910 feet, including the embankment, spillway, outlet works, and diversion structure. The embankment has a maximum height of 10 feet and is approximately 650 feet long. The 200-foot long spillway is constructed of granite blocks stepped on the downstream side. There is a low level outlet structure at the east end of the spillway. There is also an abandoned gated diversion structure at the west end of the dam on the Blackstone Canal. The following visible signs of distress indicate a potential hazard at the site: seepage at the downstream toe of the dam, lack of adequate riprap protection on the upstream face of the dam, thick vegetation and trees growing downstream of the dam, debris scattered on the dam, inoperable slide gates on the Blackstone Canal diversion structure, accumulation of debris in the inlet channel for the outlet and diversion structures, and missing or cracking mortar on the stone masonry training walls at the outlet and diversion structures. The test flood (full PMP) produces an outflow of 58,800 cfs and would overtop the dam by about 8.2 feet. The spillway can discharge only 22.1 percent of the test flood before the dam is overtopped.

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.