Download or read book National Dam Inspection Report Boyertown Reservoir Dam NDI PA 00707 PA DER 6 344 Delaware River Basin Popodickon Creek Berks County Pennsylvania Phase I Inspection Report written by John J. Williams and published by . This book was released on 1979 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boyertown Reservoir Dam is an earth and rockfill embankment with a concrete corewall and a 20-foot wide, broad-crested, concrete spillway. The upstream portion of the dam is rolled earth embankment; the downstream section is earth and rockfill. The dam is approximately 620 feet long with a maximum height of 55 feet and impounds a reservoir with a normal pool storage capacity of 105 acre-feet. The dam is located on Popodickon Creek and serves as a source of water supply for Boyertown, which is situated approximately 2.5 miles downstream (east) of the dam. The Spillway Design Flood (SDF) for this 'Intermediate' size, 'High' hazard dam is the Probable Maximum Flood (PMF). The spillway is capable of discharging 37 percent of the PMF without overtopping of the embankment. The spillway is classified as 'Inadequate'. The spillway is not classified as 'Seriously Inadequate' because the depth and duration of overtopping are not considered sufficient to cause a failure of the embankment at 50 percent of the PMF. Based on the visual observations and review of the information obtained from the Pennsylvania Department of Environmental Resources, Division of Dam Safety, Boyertown Dam is considered to be in good condition.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1980 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1980 with total page 1058 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1980 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Dam Inspection Program Mill Dam NDI Number PA 00711 DER Number 6 295 Delaware River Basin Commonwealth of Pennsylvania Berks County Pennsylvania Phase I Inspection Report written by Hendrik Jongsma and published by . This book was released on 1981 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the visual inspection, past performance and the available engineering data, the dam and its appurtenant structures appear to be in good condition. In accordance with the Corps of Engineers' evaluation guidelines, the size classification of this dam is small and the hazard classification is high. These classifications indicate that the Spillway Design Flood (SDF) should be in the range of one-half the Probable Maximum Flood (PMF) to the full PMF. The recommended SDF for this structure is the full PMF. The spillway capacity is adequate for passing 34 % of the PMF peak inflow without overtopping the dam. Overtopping of the dam by the PMF will not cause failure. The spillway, therefore is considered to be inadequate, but not seriously inadequate. The following recommendations are presented for immediate action by the owner: (1) That the valve on the outlet pipe be maintained and operated at least once a year; (2) That a formal surveillance and downstream warning system be developed for use during periods of high or prolonged rainfall; (3) That provision be made to cut or remove the screen over the spillway in case of an emergency; and (4) That an operation and maintenance manual be prepared for guidance in the operation of the dam during normal and emergency conditions, and that a schedule be developed for the annual inspection of the dam and its appurtenant structures.
Download or read book National Dam Inspection Program SCS PA 476 NDS I D Number PA 00719 DER I D Number 6 456 Delaware River Basin Tributary of Mill Creek Berks County Pennsylvania Phase I Inspection Report written by John Henry Frederick (Jr) and published by . This book was released on 1980 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book National Dam Inspection Program Hopewell Dam NDS I D Number PA 00724 DER I D Number 6 401 Delaware River Basin Scotts Run Berks County Pennsylvania Phase I Inspection Report written by Mary F. Beck and published by . This book was released on 1980 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hopewell Dam is a recreational structure located in French Creek State Park and owned by the Commonwealth of Pennsylvania. Visual inspection and review of the design and construction documentation indicate that the dam and appurtenant structures of Hopewell Dam are in good condition, although the condition of the dormant vegetation appeared to be fair at the time of the inspection. In accordance with criteria established by Federal (OCE) Guidelines, the spillway design flood for this Small size dam and High hazard classification is one-half to the full Probable Maximum Flood (PMF). As the dam's total capacity is near the upper limit of the size classification and Hopewell village is located at a narrow section of the floodplain, the selected spillway design flood is the full PMF. Hydrologic and hydraulic computations presented in Appendix D indicate the spillway is capable of passing approximately 33 percent of the PMF without overtopping the embankment. as the one-half PMF is estimated to cause failure of the structure and to significantly increase the potential for downstream damage, the spillway system of this structure is considered to be Seriously Inadequate and the dam is in an unsafe, nonemergency condition.
Download or read book National Dam Inspection Program Green Lane Reservoir Dam NDI PA 00618 PA DER 46 250 Delaware River Basin Perkiomen Creek Montgomery County Pennsylvania Phase I Inspection Report written by D'APPOLONIA CONSULTING ENGINEERS INC PITTSBURGH PA. and published by . This book was released on 1979 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Lane Reservoir Dam is a concrete gravity structure approximately 780 feet long, with a maximum height of about 87 feet. A 424 foot upgated spillway (crest Elevation 286.0) is centered along the length of the dam. The non-overflow section (Elevation 297.0) has a top width of 14 feet. Below Elevation 281.0, the upstream slope is battered on a 1 horizontal to 14.55 vertical (1H:14.55V); the downstream slope is 1H:1.35V. Both faces are vertical above Elevation 281.0. A 3-foot high parapet has been constructed on the non-overflow section. The dam is founded on firm bedrock. The foundation rock was mass grouted to depths up to 30 feet to reduce loss of water through seepage. The non-overflow sections are founded in rock on both sides of the stream valley. This rock has also been grouted to reduce seepage. The spillway is a concrete Ogee with a maximum height of approximately 77 feet. A flip bucket type energy dissipator with a 25-foot radius has been constructed at the toe of the spillway. Training walls extend downstream from the dam on both sides of the spillway. The walls are constructed to Elevation 255.0 and retain and protect the channel banks immediately below the dam. A water intake facility is located in the non-overflow section at the north end of the spillway. The intake is separated into two parallel chambers by an internal wall. Flow can be directed between the two chambers by a 36-inch sluice gate positioned in the wall. Openings at four different stages control water entering the intake. Each opening is fitted with a removable screen to prevent debris from entering.
Download or read book National Dam Inspection Program Dam G NDI ID Number PA 00643 DER ID Number 40 14 Delaware River Basin Dreck Creek Luzerne County Pennsylvania Phase I Inspection Report written by Albert Charles Hooke and published by . This book was released on 1979 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dam G is a homogeneous earthfill embankment with a concrete core-wall. The embankment is 490 feet long and 19 feet high at maximum section. There are two outlet works at the dam. The first outlet works, which is near the right end of the embankment, consists of a concrete intake structure, two 24-inch diameter cast-iron pipes, and a valve house. This outlet works is connected to the water supply system. The second outlet works, which is near the left end of the dam, is similar to the first except it consists of a single 24-inch diameter pipe. The second outlet works provides the emergency drawdown capability. The concrete chute spillway is at the left abutment of the dam. Its crest is 3.0 feet below the design elevation of the top of the dam and is 75 feet long. The approach channel is short and concrete paved. The exit channel is a continuation of the chute. A bridge extends across the spillway crest. It is supported by two piers.
Download or read book National Dam Inspection Program Bronson Pond Dam NDI ID Number PA 00143 DER ID Number 64 42 Delaware River Basin Middle Creek Wayne County Pennsylvania Phase I Inspection Report written by CORPS OF ENGINEERS BALTIMORE MD BALTIMORE DISTRICT. and published by . This book was released on 1981 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The visual inspection and review of available design and construction information indicate that Bronson Pond Dam is in fair condition. The primary deficiency noted during the inspection was the lack of any spillway or outlet facilities for the dam. Based on the size and hazard classification of the dam, the recommended Spillway Design Flood (SDF) varies between the 100-year flood and one-half the Probable Maximum Flood (PMF). Based on the size of the dam and reservoir, and the downstream conditions, the 100-year flood has been selected as the SDF. The hydrologic and hydraulic computations indicate that the combinations of reservoir storage and overflow discharge capacity pass the 100-year flood without overtopping the dam. For this reason, the overflow capacity for Bronson Pond Dam is considered to be inadequate.
Download or read book National Dam Inspection Program Lake Paupackan Dam NDI I D Number PA 00140 DER I D Number 64 33 Delaware River Basin Lakeville Creek Wayne County Pennsylvania Phase I Inspection Report written by GANNETT FLEMING CORDDRY AND CARPENTER INC HARRISBURG PA. and published by . This book was released on 1981 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book National Dam Inspection Program Long Run Reservoir Number I Dam NDI Number PA 00882 DER Number 13 004 Delaware River Basin Carbon County Pennsylvania Phase I Inspection Report written by Hendrik Jongsma and published by . This book was released on 1981 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the visual inspection, past performance and the available engineering data, the dam and its appurtenant structures appear to be in fair condition. In accordance with the Corps of Engineers' evaluation guidelines, the size classification of this dam is small and the hazard classification is high. These classifications indicate that the Spillway Design Flood (SDF) should be in the range of one-half the Probable Maximum Flood (PMF) to the full PMF. The recommended SDF for this structure is one-half the PMF. The spillway capacity is adequate for passing 23 percent of the PMF peak inflow without overtopping the dam. Overtopping by the SDF is expected not to cause failure of the dam. The spillway, therefore, is considered to be inadequate, but not seriously inadequate. Some recommendations presented for immediate action by the owner are: (1) that measures shall be taken to provide an adequate spillway capacity, (2) that the cracked spillway slab be repaired, (3) that the downstream end of the spillway be protected from washouts during large discharges, (4) that the upstream gates be maintained and operated on a regular basis, and (5) that the downstream blow-off valves be maintained and operated on an annual basis.
Download or read book National Dam Inspection Program Green Hills Dam NDS I D Number Pa 00714 DER I D Number 6 373 Delaware River Basin Berks County Pennsylvania Phase i Inspection Report written by Mary F. Beck and published by . This book was released on 1980 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is prepared under guidance contained in the Recommended Guidelines for Safety Inspection of Dams for Phase I Investigations. The purpose of a Phase I investigation is to expeditiously identify those dams which may pose hazards to human life or property. The assessment of the general condition of the dam is based upon available data and visual inspections. Detailed investigations, testing and detailed computational evaluations are beyond the scope of the Phase I investigation; however, the investigation is intended to identify the need for more detailed studies. In reviewing this report, it should be realized that the reported condition of the dam is based on observations of field conditions at the time of inspection along with data available to the inspection team. In cases where the reservoir was lowered or drained prior to inspection, such action, while improving the stability and safety of the dam, removes the normal load on the structure and may obscure certain conditions which might otherwise be detectable if inspected under the normal operating environment of the structure.
Download or read book National Dam Inspection Program Dam F NDI ID Number PA 00642 DER ID Number 40 13 Delaware River Basin Dreck Creek Luzerne County Pennsylvania Phase I Inspection Report written by Albert Charles Hooke and published by . This book was released on 1979 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on visual inspection, available records, calculations, past operational performance, and according to criteria established for these studies, Dam F is judged to be unsafe, nonemergency, because the spillway capacity is rated as seriously inadequate. The spillway can pass 29 percent of the Probable Maximum Flood (PMF) without overtopping of the dam. The Owner has placed sandbags along the spillway crest, which reduces the spillway capacity further. The resulting outflows from the failure of Dam F would overtop and cause the failure of Dam G. This would result in the loss of life. As a whole, the dam is judged to be in fair condition. There are bulges on the downstream slope that apparently have not stabilized. The dam has essentially no operational emergency drawdown capability. Maintenance at the dam is marginal.
Download or read book National Dam Inspection Program Kintz Creek Dam NDI PA 00415 PA DER 52 159 SCS PA 439 Delaware River Basin Kintz Creek Pike County Pennsylvania Phase I Inspection Report written by O'BRIEN AND GERE ENGINEERS INC PHILADELPHIA PA JUSTIN AND COURTNEY DIV. and published by . This book was released on 1979 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kintz Creek Dam is a zoned earth embankment, approximately 1,180 feet in length with a maximum height of 36 feet. The top of the dam is 14 feet wide at Eelvation 1626.2. The earth embankment side slopes are 3 horizontal to 1 vertical (3H:1V) upstream and 2H:1V downstream. According to the as-built plans, the embankment has a central core with 1H:1V side slopes to Eelvation 1620 and a cutoff trench approximately 6 feet in depth with a 12 foot base width. The central core and cutoff trench are composed of Zone I material (silty material, classified as ML). The downstream shell to Elevation 1620 consists of Zone II material (sandy silt, classified as SP-SM). Zone III material (gravel, classified GM) forms the upstream shell and cap over the core material, and is also used as an 8-foot thick downstream filter between the Zone I and Zone II material to a minimum Elevation of 1608. A layer of Zone V material (spoil material and boulders in excess of 6inches) covers the downstream face to Elevation 1620. A 10-foot wide berm is provided along the upstream face from Elevation 1596.8 to 1597.8. According to the as-built plans, six relief wells are spaced at 50 feet along the downstream to. Flow from the wells enters a 4-foot wide drain trench that terminates at the Principal Spillway outlet (impact basin). The drain trench lies beneath a 15-foot wide berm with a slope of 10H:1V.
Download or read book National Dam Inspection Program SCS PA 477 NDS I D Number PA 00720 DER I D Number 6 457 Delaware River Basin Tributary of Mill Creek Berks County Pennsylvania Phase I Inspection Report written by John Henry Frederick (Jr) and published by . This book was released on 1980 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book National Dam Inspection Program Rakes Dam NDI Number PA 00993 DER Number 45 148 Delaware River Basin Pond Creek Monroe County Pennsylvania Phase I Inspection Report written by and published by . This book was released on 1981 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rakes Dam is a privately owned dam used for recreational purposes. The dam i s currently in fair condition and is poorly maintained and the spillway and pond drain are in poor condition requiring maintenance. The structure is considered to have an 'Adequate' spillway capacity.
