Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
National Program for Inspection of Non-Federal Dams. Wyman Pond Dam MA 00641, Merrimack River Basin, Westminster, Massachusetts. Phase 1 Inspection Report
The Wyman Pond Dam, constructed almost 80 years ago, is an earthfill structure with a concrete core. The dam is about 450 feet long and has a maximum height above stream bed of about 16 feet. The dam has a 50-foot long ungated spillway with 5 feet of freeboard, the downstream channel of which leads to a culvert under a highway intersection just downstream of the dam. There are outlet works which are inoperable and are permanently closed. The dam appears to be in good condition and well maintained. The only drawing available shows its dimensions to be compatible with modern design concepts. Reservoir storage will reduce the probable maximum discharge of 13,250 cfs to a test flood of 10,600 cfs. The spillway structure, itself, can discharge about 1,700 cfs (15 percent of the test flood). However, a culvert under the highway downstream of the dam can discharge only 500 cfs (4 percent of the test flood) before the highway is overtopped. In the event of the test flood (using 13,250 in calculations due to culvert capacity), the highway would be overtopped by about 3 feet; the dam by about 5 1/2 feet. Water level differences would be in the order of 4 feet, thus a failure of the dam during the test flood would not add significantly to the total discharge.
National Program for Inspection of Non-Federal Dams. Wyman Pond Dam MA 00641, Merrimack River Basin, Westminster, Massachusetts. Phase 1 Inspection Report
The Wyman Pond Dam, constructed almost 80 years ago, is an earthfill structure with a concrete core. The dam is about 450 feet long and has a maximum height above stream bed of about 16 feet. The dam has a 50-foot long ungated spillway with 5 feet of freeboard, the downstream channel of which leads to a culvert under a highway intersection just downstream of the dam. There are outlet works which are inoperable and are permanently closed. The dam appears to be in good condition and well maintained. The only drawing available shows its dimensions to be compatible with modern design concepts. Reservoir storage will reduce the probable maximum discharge of 13,250 cfs to a test flood of 10,600 cfs. The spillway structure, itself, can discharge about 1,700 cfs (15 percent of the test flood). However, a culvert under the highway downstream of the dam can discharge only 500 cfs (4 percent of the test flood) before the highway is overtopped. In the event of the test flood (using 13,250 in calculations due to culvert capacity), the highway would be overtopped by about 3 feet; the dam by about 5 1/2 feet. Water level differences would be in the order of 4 feet, thus a failure of the dam during the test flood would not add significantly to the total discharge.
National Program for Inspection of Non-Federal Dams. Wyman Pond Dam MA 00641, Merrimack River Basin, Westminster, Massachusetts. Phase 1 Inspection Report
1978
54 pages
Report
Keine Angabe
Englisch
Civil Engineering , Earth dams , Visual inspection , Safety , Hazards , Deficiencies , Concrete , Cores , Structures , Dams , Inspection , Capacity(Quantity) , Channels(Waterways) , Downstream flow , Massachusetts , Reservoirs , Storage , Spillways , Floods , Ponds , Water , Level(Quantity) , Wyman Pond Dam , National Dam Inspection Program