National Dam Inspection Program Suydam Dam Nds Id Pa 00085 Der Id 64 169 Delaware River Basin Lollipop Creek Wayne County Pennsylvania Phase I Inspection Report
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| Author | : WOODWARD-CLYDE CONSULTANTS PLYMOUTH MEETING PA. |
| Publisher | : |
| Total Pages | : 90 |
| Release | : 1978 |
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| ISBN | : |
Suydam Dam is a 24 foot high homogeneous earth embankment, 508 feet long and impounds a 12.1-acre reservoir. The embankment contains a downstream crushed rock trench drain discharging through a 6-inch diameter corrugated metal drain. This pipe discharges at the downstream toe. The upstream slope to elevation 1,285.0 is protected with a 12-inch riprap layer over a 12-inch filter course. The upstream and downstream slopes are 3H:1V and 2H:1V, respectively. Except for riprapped surfaces, both slopes are covered with grass and Crownvetch. The crest is 12 feet wide with a settled design elevation of 1,298.0.
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| Publisher | : |
| Total Pages | : 1186 |
| Release | : 1979 |
| Genre | : Science |
| ISBN | : |
| Author | : WOODWARD-CLYDE CONSULTANTS PLYMOUTH MEETING PA. |
| Publisher | : |
| Total Pages | : 78 |
| Release | : 1979 |
| Genre | : |
| ISBN | : |
Greene-Dreher Dam is a 20-foot high earthern embankment, 1,000 feet long which impounds a 152 acre-foot flood water retention pool. Total estimated volume of fill is approximately 30,000 cubic yards. The zoned embankment was constructed on natural soils without a cutoff trench or a grout curtain. The embankment contains three material zones; Zone 1, a relatively impervious core of silt and and silty sand; Zone 2, composed of silty gravel and silty sand; and an outer shell of Zone 3 material, described as rock larger than 6 inches in diameter. The embankment crest is 12 feet wide at a design settled elevation of 2,036 feet, and both upstream and downstream slopes are 3H:1V. The downstream section of the embankment contains a filter blanket approximately 2 feet thick, 30 feet wide and 320 feet long. The filter blanket is drained by a 6-inch diameter perforated corrugated metal pipe connected to a 6-inch diameter pipe which outlets adjacent to the principal spillway outlet.
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| Publisher | : |
| Total Pages | : 1032 |
| Release | : 1979 |
| Genre | : Research |
| ISBN | : |
Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
| Author | : WOODWARD-CLYDE CONSULTANTS PLYMOUTH MEETING PA. |
| Publisher | : |
| Total Pages | : 89 |
| Release | : 1978 |
| Genre | : |
| ISBN | : |
Cadjaw Pond Dam is owned by the Honesdale consolidated Water Co., and was once used as an emergency water supply source for the city and surrounding area. Currently, the dam has no immediate purpose for the water company except in the extreme event that water is needed as a supplemental source. The dam is in an obvious state of disrepair and severely neglected. Further, there are a large number of unknowns concerning the overall stability of the embankment. Until such time as appropriate studies are made and needed repairs performed, the dam should be considered unsafe. Based on this, seven recommendations are presented with the anticipation that it is desired to keep the structure and reservoir in service. If there is no need to maintain this structure, or if rehabilitative costs are excessive, an alternate solution would be to breach the structure under the guidance of a Professional Engineer, and allow the water level to reach the preexisting level of the natural lake.
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| Publisher | : |
| Total Pages | : 1108 |
| Release | : 1979 |
| Genre | : Science |
| ISBN | : |
| Author | : John Henry Frederick (Jr) |
| Publisher | : |
| Total Pages | : 91 |
| Release | : 1980 |
| Genre | : |
| ISBN | : |
SCS PA 476 Dam is a 46-foot-high zoned-earth embankment about 400 feet long. The principal spillway consists of a concrete drop inlet riser, 182 feet of 24 inch reinforced concrete pipe with six anti-seep collars, and an impact basin. The reservoir drain is a 12-inch corrugated metal pipe. The dam and its appurtenant facilities are considered to be in good condition. Calculations indicate that the existing spillway systems are capable of passing the Probable Maximum Flood (PMF) without overtopping. Therefore, the spillway system is considered to be adequate.
| Author | : Frederick Futchko |
| Publisher | : |
| Total Pages | : 91 |
| Release | : 1981 |
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| ISBN | : |
Based on the criteria established for these studies, Freethy Dam is judged to be unsafe, nonemergency, because the spillway capacity is seriously inadequate. The recommended Spillway Design Flood (SDF) for the size and hazard classification of the dam varies between 1/2 of the Probable Maximum Flood (PMF) and the PMF. Based on the size of the dam and reservoir, the 1/2 PMF is selected as the SDF. The existing spillway will pass only about 2 percent of the PMF before overtopping of the dam occurs. It is judged that the dam could not withstand the depth and duration of overtopping during storms of only 20 percent of the PMF. Failure of the dam would cause an increased hazard for loss of life downstream. Overall, the dam is judged to be in good condition.
| Author | : GANNETT FLEMING CORDDRY AND CARPENTER INC HARRISBURG PA. |
| Publisher | : |
| Total Pages | : 71 |
| Release | : 1981 |
| Genre | : |
| ISBN | : |
Based on available records, visual inspection, calculations, and past operational performance, Lake Paupackan Dam is judged to be in fair condition. Considering the size and hazard classification of the dam, the recommended Spillway Design Flood (SDF) varies between the 1/2 Probable Maximum Flood (PMF) and the PMF. The 1/2 PMF was, in this case, selected as the SDF. The spillway and reservoir, under existing conditions, will pass approximately 19 percent of the PMF before overtopping of the dam occurs. The spillway is, therefore, rated as inadequate.
| Author | : John Henry Frederick (Jr) |
| Publisher | : |
| Total Pages | : 90 |
| Release | : 1980 |
| Genre | : |
| ISBN | : |
SCS PA 477 is a 52-foot-high, 1,550-foot-long dam. The embankment contains an impervious core constructed over a cutoff trench under the dam centerline. About 1,270 feet of the embankment is roughly parallel to U.S. Route 22/Interstate 78. The remaining 280 feet of the embankment forms an angle of about 60 degrees with the highway. The shorter leg contains the maximum section and the principal spillway. The principal spillway consists of a concrete drop inlet riser, a 222 foot long, 30 inch reinforced concrete pipe with eight anti-seep collars, and an impact basin. The emergency spillway was excavated through rock at the right abutment. The grass-lined trapezoidal channel is approximately 150 feet wide and 30 feet wide. The dam and its appurtenant facilities are considered to be in good condition. Calculations indicate that the existing spillway systems are capable of passing the Probable Maximum Flood (PMF) without overtopping. Therefore, the spillway system is considered to be adequate.
