National Dam Inspection Program Steinhauer Dam Ndi Number Pa 00947 Pennder Number 8 64 Susquehanna River Basin Unnamed Tributary Of Roaring Run Bradford County Pennsylvania Phase I Inspection Report
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Author | : John A. Dziubek |
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Total Pages | : 75 |
Release | : 1981 |
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The dam was found to be in fair overall condition at the time of inspection. Hydraulic/hydrologic evaluations, performed in accordance with procedures established by the Baltimore District, Corps of Engineers, for Phase I Inspection Reports, revealed that the spillway capacity is less than the peak inflow to the impoundment during the 100-year flood. A spillway design flood (SDF) in the range of the 100-year flood to the 1/2 Probable Maximum Flood (1/2 PMF) is required for Steinhauer Dam. Because the dam is on the low end of the 'Small' size category in terms of storage capacity and height, the 100-year flood was chosen as the SDF. The spillway will not pass the SDF without overtopping the dam. The spillway is therefore considered inadequate.
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Total Pages | : 890 |
Release | : 1982-04 |
Genre | : Science |
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Total Pages | : 1304 |
Release | : 1982 |
Genre | : Government reports announcements & index |
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Total Pages | : 1016 |
Release | : 1982 |
Genre | : Government reports announcements & index |
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Author | : Bernard M. Michalcin |
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Total Pages | : 117 |
Release | : 1980 |
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Based on a visual inspection, operational history, and available engineering data, the facility is considered to be in good condition. The size classification of the facility is intermediate and its hazard classification is considered to be high. In accordance with the recommended guidelines, the Spillway Design Flood (SDF) for the facility is the PMF (Probable Maximum Flood). Results of the hydrologic and hydraulic analysis indicate the facility will pass and/or store only about 45 percent of the PMF prior to embankment overtopping. A breach analysis indicates that failure under less than 1/2 PMF conditions could lead to increased downstream damage and potential for loss of life. Thus, based on screening criteria provided in the recommended guidelines, the spillway is considered to be seriously inadequate and the facility unsafe, non-emergency. Calculations also indicate that if the spillway were constructed in accordance with available desing drawings, the facility could pass and/or store approximately 63 percent of the PMF.
Author | : Bernard M. Mihalcin |
Publisher | : |
Total Pages | : 100 |
Release | : 1980 |
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Macham Dam is an earth embankment approximately 19 feet high and 575 feet long, including spillway. The facility is provided with an uncontrolled, rectangular, concrete chute channel spillway located at the left abutment. The spillway is constructed with a 75-foot long, broad crested weir having a 35-foot breadth. Drawdown capability is provided by means of an 18-inch diameter reinforced concrete conduit controlled at the inlet by an 18-inch diameter sluice gate. Based on a visual inspection, operational history, and available engineering data, the dam is considered to be in fair condition. The facility will pass and/or store only about 43 percent of the PMF prior to embankment overtopping. (Author).
Author | : BAKER (MICHAEL) JR INC BEAVER PA. |
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Total Pages | : 80 |
Release | : 1981 |
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Beaver Pond Dam is classified as a 'Significant' hazard - 'Small' size dam. The dam was found to be in poor overall condition at the time of inspection. Hydraulic/hydrologic evaluations, performed in accordance with procedures established by the Baltimore District, Corps of Engineers, for Phase I Inspection Reports, revealed that the spillway will not pass the 100-year flood without overtopping the dam. A spillway design flood (SDF) in the range of the 100-year flood to the 1/2 Probable Maximum Flood (1/2 PMF) is required for Beaver Pond Dam. Because the dam is on the low end of the 'Small' size category in terms of storage capacity and height, the 100-year flood was chosen as the SDF. During the 100-year flood, the dam is overtopping by a maximum depth of 3.27 feet for a total duration of 8.67 hours. The spillway is therefore considered 'Inadequate.' It is recommended that the owner immediately develop recommendations for remedial measures to reduce the overtopping potential of the dam.
Author | : John A. Dziubek |
Publisher | : |
Total Pages | : 72 |
Release | : 1981 |
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Hathaway Pond Dam is located in Ararat Township, Susquehanna County, Pennsylvania. The reservoir was originally created to provide water for power purposes. The reservoir slopes are moderate with a good cover of vegetation. There are three ponds upstream from Hathaway Pond Dam on two tributary streams. The western stream contains Romobe Lake (PennDER I.D. No. 58-10) which is 1750 feet upstream from Hathaway Pond Dam. The eastern tributary contains Ball Lake and an unnamed smaller pond in series. Ball Lake is 2450 feet upstream and will retain considerable storage while the smaller unnamed pond was considered to have no effect on Hathaway Pond Dam. Two homes, a trailer, and township road are located 1800 feet downstream from Hathaway Pond Dam. These could suffer economic damage in the event of a dam failure.
Author | : BAKER (MICHAEL) JR INC BEAVER PA. |
Publisher | : |
Total Pages | : 78 |
Release | : 1981 |
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Orson Pond Dam is classified as a 'Significant' hazard - 'Small' size dam. The dam was found to be in fair overall condition at the time of inspection. Hydraulic/hydrologic evaluations, performed in accordance with procedures established by the Baltimore District, Corps of Engineers, for Phase I Inspection Reports, revealed that the spillway will not pass the 100-year flood without overtopping the dam. A spillway design flood (SDF) in the range of the 100-year flood to the 1/2 Probable Maximum Flood (1/2 PMF) is required for Orson Pond Dam. Because the dam is on the low end of the 'Small' size category in terms of storage capacity and height, the 100-year flood was chosen as the SDF. During the 100-year flood, the dam is overtopped by a maximum depth of 1.79 feet for a total duration of 9.33 hours. The spillway is therefore considered 'inadequate.' It is recommended that the owner immediately develop recommendations for remedial measures to reduce the overtopping potential of the dam. Several items of remedial work should be immediately initiated by the owner.
Author | : D'APPOLONIA CONSULTING ENGINEERS INC PITTSBURGH PA. |
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Total Pages | : 70 |
Release | : 1981 |
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Based on the evaluation of the existing conditions, the condition of Cooks Pond Dam is considered to be unsafe/nonemergency due to the seriously inadequate spillway capacity and structural deficiencies. The condition of the embankment is considered to be poor. The dam is old and in a general state of disrepair. The crest of the dam is irregular and the center of the dam appears to have settled. The stone wall along the downstream toe is irregular and bulging. The toe of the wall is swampy, caused by a general underseepage. In view of these observations, the overall stability of the dam is considered to be questionable, requiring further investigation and implementation of measures to improve the stability of the dam. The spillway capacity was evaluated according to the recommended procedure and was found to pass less than 10 percent of the Probable Maximum Flood (PMF) without overtopping the embankment. This capacity is less than the required spillway capacity of one-half PMF relative to the size and hazard classification of the dam. Because the spillway capacity is less than 50 percent of the PMF and it is estimated that failure of the dam due to overtopping would significantly increase the downstream hazard of loss of life compared to that which would exist just before failure, the spillway is considered to be seriously inadequate, and consequently the condition of the dam is considered to be unsafe/nonemergency.