National Dam Safety Program. Penn Nursery Dam (NDI I.D. Number PA-00470, Penn DER I.D. Number 14-117), Susquehanna River Basin, Potter Run, Centre County, Pennsylvania. Phase I Inspection Report

National Dam Safety Program. Penn Nursery Dam (NDI I.D. Number PA-00470, Penn DER I.D. Number 14-117), Susquehanna River Basin, Potter Run, Centre County, Pennsylvania. Phase I Inspection Report
Author: Bernard M. Mihalcin
Publisher:
Total Pages: 82
Release: 1980
Genre:
ISBN:

Based on a visual inspection, operational history, and available engineering data, the dam is considered to be in good condition. The size classification of the facility is small and its hazard classification is considered to be high. In accordance with the recommended guidelines, the Spillway Design Flood (SDF) for the facility ranges between the 1/2 PMF (Probable Maximum Flood) and the PMF. Due to the high potential for damage to downstream structures and possibly loss of life, the SDF is considered to be the PMF. Results of the hydrologic and hydraulic analysis indicate the facility will pass and/or store approximately 92 percent of the PMF prior to embankment overtopping. Based on screening criteria contained in the recommended guidelines, the spillway is considered to be inadequate, but not seriously inadequate. Deficiencies noted by the inspection team included a seepage condition along a portion of the downstream embankment toe approximately 160 feet to the right of the left abutment hillside and a minor vertical crack in the concrete spillway overflow wall.

National Dam Safety Program. Parker Dam (NDI Number PA 01126, PennDER Number 17-87), Susquehanna River Basin, Laurel Run, Clearfield County, Pennsylvania. Phase I Inspection Report

National Dam Safety Program. Parker Dam (NDI Number PA 01126, PennDER Number 17-87), Susquehanna River Basin, Laurel Run, Clearfield County, Pennsylvania. Phase I Inspection Report
Author: John A. Dziubek
Publisher:
Total Pages: 71
Release: 1980
Genre:
ISBN:

Parker Dam is classified as a 'Significant' hazard - 'Small' size dam. The dam and reservoir, owned by the Commonwealth of Pennsylvania, Department of Environmental Resources, are used for recreational purposes. The dam and appurtenant structures were found to be in good overall condition at the time of the inspection. 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 Parker Dam. Since the dam is in the middle of the 'Small' size category according to storage capacity, the 1/2 PMF was selected as the SDF. Hydrologic/hydraulic evaluations, performed in accordance with procedures established by the Baltimore District of the U.S. Army Corps of Engineers, revealed that the available spillway capacity is much greater than the maximum flow expected during the SDF. Therefore, the dam will not be overtopped during the SDF and the spillways are considered to be 'adequate'.

National Dam Safety Program. Ward Run. NDI Number PA-01124 PennDER Number 63-75 SCS Number PA-483. Ohio River Basin, Washington County, Pennsylvania. Phase I Inspection Report

National Dam Safety Program. Ward Run. NDI Number PA-01124 PennDER Number 63-75 SCS Number PA-483. Ohio River Basin, Washington County, Pennsylvania. Phase I Inspection Report
Author: John A. Dziubek
Publisher:
Total Pages: 87
Release: 1980
Genre:
ISBN:

PA 483 is a 74-foot high, zoned-earthfill floodwater retarding dam designed by the U.S. Department of Agriculture, Soil Conservation Service (SCS). The dam is owned and operated by the Washington County Commissioners. The dam consists of a 360 foot long embankment, a vegetated earth side channel emergency spillway, and an intake riser and outlet conduit (principal spillway). The dam and appurtenant structures were found to be in good overall condition at the time of the inspection. Hydraulic/hydrologic evaluations revealed that the spillway will pass the Probable Maximum Flood (PMF) without overtopping the dam. PA 483 is a 'High' hazard, 'Intermediate' size dam requiring evaluation for a spillway design flood (SDF) equal to the PMF. Therefore, the spillway is assessed as 'adequate.' The inspection revealed certain items of remedial work which should be performed immediately by the owner.

National Dam Inspection Program. Kephart Dam (NDS ID Number PA-00447, PennDER ID Number 14-89), Susquehanna River Basin, Black Moshannon Creek, Centre County, Pennsylvania. Phase I Inspection Report

National Dam Inspection Program. Kephart Dam (NDS ID Number PA-00447, PennDER ID Number 14-89), Susquehanna River Basin, Black Moshannon Creek, Centre County, Pennsylvania. Phase I Inspection Report
Author: GAI CONSULTANTS INC MONROEVILLE PA.
Publisher:
Total Pages: 79
Release: 1979
Genre:
ISBN:

Based on a visual inspection, past performance, and available engineering data, the facility is considered to be in good condition. The facility is capable of passing and/or storing the flow resulting from a flood of PMF intensity without overtopping, consequently, the spillway is considered adequate. It is recommended that the owner: (a) Have the embankment crest surveyed and infill any low spots to restore the embankment section to its design elevation (1874.0). (b) Extend the riprap protection to the top of the dam along the emergency spillway-embankment junction to provide slope protection in the event the emergency spillway should discharge at or near full capacity. (c) Develop a warning system to provide for the notification of temporary downstream residents should hazardous conditions develop.

National Dam Inspection Program. Recreation Dam (NDS ID Number PA-00446, PennDER ID Number 14-26), Susquehanna River Basin, Cold Stream, Centre County, Pennsylvania. Phase I Inspection Report

National Dam Inspection Program. Recreation Dam (NDS ID Number PA-00446, PennDER ID Number 14-26), Susquehanna River Basin, Cold Stream, Centre County, Pennsylvania. Phase I Inspection Report
Author: GAI CONSULTANTS INC MONROEVILLE PA.
Publisher:
Total Pages: 144
Release: 1979
Genre:
ISBN:

Recreation Dam is an L-shaped earth dam with a measured maximum height of 14.7 feet and a total length of approximately 1,600 feet. The facility is provided with a masonry spillway at the left abutment along its northern section and a diversion canal along its easterly extension. The latter serves to divert acid mine drainage from upstream mined areas around the facility. Based on visual observations, past history, and a hydrologic and hydraulic investigation, the dam and its appurtenances are considered in poor condition. Based on a visual evaluation and past performance the spillway system is considered structurally unsafe but of non-emergency status as the reservoir is completely drawn down. In addition, evaluation of the flashboard system indicated that failure of the flashboards under normal operating procedures could in itself cause serious downstream consequences.

National Dam Inspection Program. Lake Walter Dam (NDI I.D. Number PA-0080 DER I.D. Number 058-135) Susquehanna River Basin. Tributary of Messhoppen Creek, Susquehanna County, Pennsylvania. Phase I Inspection Report

National Dam Inspection Program. Lake Walter Dam (NDI I.D. Number PA-0080 DER I.D. Number 058-135) Susquehanna River Basin. Tributary of Messhoppen Creek, Susquehanna County, Pennsylvania. Phase I Inspection Report
Author: Lawrence D. Andersen
Publisher:
Total Pages: 64
Release: 1981
Genre:
ISBN:

Lake Walter Dam is located on Spring Run, approximately one mile upstream of its confluence with Meshoppen Creek in Springville Township, Susquehanna County, Pennsylvania. The condition of Lake Walter Dam is considered to be good. The only significant condition noted which requires further attention is the lack of erosion protection in the emergency spillway discharge channel. The swampy condition at the toe of the dam is not considered to be significant at this time; however, the condition should be monitored to document if seepage is developing.

National Dam Inspection Program. Harris Pond Dam (NDI I.D. Number PA-00569, Penn DER I.D. Number 40-129). Susquehanna River Basin, Roaring Brook Creek, Luzerne County, Pennsylvania. Phase I. Inspection Report

National Dam Inspection Program. Harris Pond Dam (NDI I.D. Number PA-00569, Penn DER I.D. Number 40-129). Susquehanna River Basin, Roaring Brook Creek, Luzerne County, Pennsylvania. Phase I. Inspection Report
Author: Bernard M. Mihalcin
Publisher:
Total Pages: 72
Release: 1981
Genre:
ISBN:

Harris Pond Dam is a combination earth, concrete and masonry structure approximately 10 feet high and 135 feet long, including spillway. It is located on Roaring Brook Creek in Ross Township, Luzerne County, Pennsylvania. The overall appearance of the facility suggests it to be in good condition. The only deficiency noted by the inspection team that requires immediate remedial attention was the areas exhibiting concrete deterioration. Flashboards (reportedly removed during significant storms) were observed in-place across the service spillway. Although generally considered undesirable, they appear, in this particular case, to be of little significance relative to the safe operation of Harris Pond Dam.