Download or read book National Dam Inspection Program Wilson Creek Dam NDI PA 00318 PA DER 52 154 SCS PA 440 Delaware River Basin Wilson 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 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wilson Creek Dam is a zoned earth embankment with a foundation cutoff trench. The cut-off trench has a base width of 12 feet and extends into the foundation. The cut-off trench is backfilled with a zone of silty sand and silt of low permeability. The central core of the dam is composed of silty sand and silt to an elevation 9.5 feet below the top of the dam. The remainder of the dam is a pervious zone of silty gravel. The earth embankment has side slopes of 3 horizontal to 1 vertical (3H:1V) on the upstream side and 2H:1V on the downstream side. Berms exist on the upstream and downstream slopes of the dam. The berm on the upstream side is 8 feet wide and slopes towards the reservoir on a 12.5 percent grade; its lowest elevation is at the normal pool 1708.4. The berm on the downstream slope is 36 feet wide and slopes downstream on a 1.4 percent grade. This berm is used as a roadway with its lowest elevation at 1710.(Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Government reports annual index written by and published by . This book was released on 199? with total page 1018 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 1979-11 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Dam Inspection Program Taylor Pond Dam NDI PA 00315 PA DER 52 152 SCS PA 446 Delaware River Basin Taylor 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 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taylor Pond Dam is a zoned earth and rockfill embankment, approximately 2,300 feet in length with a maximum height of 76 feet. The embankment is constructed with a change in alignment (78 degree bend) to the right, starting approximately 1,100 feet from the left abutment. The top of the dam is 22 feet wide at design Elevation 1829. The embankment side slopes are 2 horizontal to 1 vertical (2H:1V) both upstream and downstream. According to the as-built plans, the embankment is constructed in three zones. A central impervious core to Elevation 1821 and a cutoff trench extending to 22 feet below natural ground are composed of silt (ML) and clay (CL) materials (Zone 1). The core side slopes are 0.4H:1V and the top width is 10 feet. The cutoff trench has 1H1V side slopes and a 10 foot bottom width. Zone 2 material is an intermediate layer between the core and the shell and consists of silty sand (SM), silty gravel (GM), and cobbles from the designed borrow areas. Zone 2 extends to Elevation 1827 with a top width of 20 feet and side slopes which are slightly steeper than 2H:1V. Zone 3 material, which forms the upstream and downstream shells, is composed of rocks larger than 6 inches obtained from the Emergency Spillway excavation and oversize material raked out of Zone 1 and Zone 2 material.
Download or read book National Dam Inspection Program Gorson Dam NDI ID Number PA 01084 DER ID Number 52 61 Delaware River Basin Mill Creek Pike County Pennsylvania Phase I Inspection Report written by Frederick FUTCHKO and published by . This book was released on 1981 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the criteria established for these studies, Gorson 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. The selected SDF is the 1/2 PMF. The existing spillway will pass only about 20 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 that would occur for the 1/2 PMF. If the low areas on the top of the dam were filled to the design elevation, the spillway would pass about 36 percent of the PMF without any overtopping. For either condition, the spillway capacity is rated as seriously inadequate. Failure of Gorson Dam would cause an increased hazard for loss of life downstream.
Download or read book National Dam Inspection Program Walker Lake Dam NDI ID Number PA 00317 DER ID Number 52 127 Delaware River Basin Pike County Pennsylvania Phase I Inspection Report written by Hendrik Jongsma and published by . This book was released on 1980 with total page 73 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 flood control structure is the PMF. The spillway capacity is adequate for passing 71 percent of the PMF peak inflow without overtopping the dam. The spillway, therefore, is considered to be inadequate, but not seriously inadequate.
Download or read book National Dam Inspection Program Long Ridge Dam NDI I D Number PA 01022 PennDER I D Number 52 185 Delaware River Basin Branch of Hornbecks Creek Pike County Pennsylvania Phase I Inspection Report written by and published by . This book was released on 1981 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual inspection, operational history and hydrologic/ hydraulic anlaysis, the dam is considered to be in fair condition. The size classification of the facility is small and the hazard classification is considered to be high. In accordance with the recommended guidelines, the Spillway Design Flood (SDF) ranges between the 1/2 PMF (Probable Maximum Flood) and the PMF. Since the facility is classified near the lower bounds of the small category, the SDF is considered to be the 1/2 PMF. Results of the hydrologic and hydraulic analysis indicate the facility is capable of accommodating a 1/2 PMF event. Specifically, the facility will pass and/or store about 65 percent of the PMF prior to embankment overtopping. Consequently, the spillway is considered hydraulically adequate. It is noted that the spillway, as constructed, is considered to be deficient. The evaluation of its hydraulic adequacy is based upon the assumption that the channel adequately protected against erosion such that its service cannot threaten the structural integrity of the embankment.
Download or read book National Dam Inspection Program Lower Lake Dam NDI PA 00306 PA DER 52 144 Delaware River Basin East Branch Wallenpaupack 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 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower Lake Dam is an earth embankment with a concrete gravity spillway. The embankment is approximately 340 feet in length with a maximum height of 22.5 feet. The dam inpounds a reservoir with a surface area of 250 acres and a storage capacity of 1,085 acre-feet at normal pool level. The top of the dam is 20 feet wide; the upstream and downstream side slopes are approximately 2.5 horizontal to 1.0 vertical (2.5H:1V). No information is available concerning the properties of the embankment materials. Within the embankment is a tapered reinforced concrete cutoff wall that extends from bedrock to 3.5 feet below the top of the embankment. The reinforced concrete spillway, which has maximum height of 13 feet from base to crest, consists of 3 sections separated by bridge piers. Each section id broad-crested weir with a vertical upstream face and a flat, sloping downstream face. The crest of the center section is 48.5 feet long and crest of each of the two end sections is 45.75 feet long. The crest of the center section, which is 3 feet wide, is 0.5 feet below the crest of the end sections; each of the end sections is 2.5 feet wide.
Download or read book National Dam Inspection Program Lake Greeley Dam NDI I D Number PA 00752 PennDER I D Number 52 20 Delaware River Basin Taylortown Creek Pike County Pennsylvania Phase I Inspection Report written by and published by . This book was released on 1981 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual inspection, operational history, and hydrologic and hydraulic analysis, the dam is considered to be in fair 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. Since the facility is classified near the upper bounds of the small category with regard to available storage capacity, the SDF is considered to be the PMF. Results of the hydrologic and hydraulic analysis indicate that under existing conditions the facility will pass and/or store only about 17 percent of the PMF prior to embankment overtopping at the low area adjacent the left abutment. If the low area were regraded to the design top of dam, the spillway system would then pass about 28 percent of the PMF prior to embankment overtopping. Under existing conditions, spillway discharges are controlled by the existence of a township-owned roadway embankment and culvert that is situated about 100 feet downstream of the spillway weir.
Download or read book National Dam Inspection Program Maple Lake Dam Delaware River Basin Stoffle Denmark Creek Pike County Pennsylvania NDI ID Number PA 00766 DER ID Number 52 170 Pine Ridge Community Association Phase I Inspection Report written by Frederick Futchko and published by . This book was released on 1980 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maple Lake Dam is a homogeneous, earthfill embankment. It is 35 feet high at its maximum section and 685 feet long. The main spillway is located at the maximum section of the dam. It consists of a reinforced concrete riser structure near the upstream toe of the dam, a 24-inch diameter conduit, and a concrete outlet structure at the downstream toe of the dam. The auxiliary spillway is an excavated, trapezoidal channel at the left abutment of the dam. Based on visual inspection, available records, calculations, past operational performance, and according to criteria established for these studies, Maple Lake Dam is judged to be in good condition. Based on existing conditions, the main and auxiliary spillways will pass an approximate minimum of 48 percent of the Probable Maximum Flood (PMF before overtopping of the dam occurs. No stability problems were evident for the embankment at the time of the visual inspection, but a potential hazard to stability exists due to erosion that might occur when there is flow in the auxiliary spillway.
Download or read book National Dam Inspection Program Westcolang Lake Dam NDI I D Number PA 00396 PennDER I D Number 52 4 Delaware River Basin Westcolang Creek Pike County Pennsylvania Phase I Inspection Report written by Bernard M. Mihalcin and published by . This book was released on 1981 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on visual inspection, operational history, and hydrologic/hydraulic analysis, the dam is considered to be in fair 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 20 percent of the PMF prior to embankment overtopping. A breach analysis indicates that failure under 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.
Download or read book National Dam Inspection Program Rickards Dam NDI I D Number PA 00405 PennDER I D Number 52 82 Delaware River Basin Branch of Hornbecks Creek Pike County Pennsylvania Phase I Inspection Report written by GAI CONSULTANTS INC MONROEVILLE PA. and published by . This book was released on 1981 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual inspection, construction history, and available engineering data, the dam is considered to be in poor 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. Since the facility is classified near the lower bounds of the small category, the SDF is considered to be the 1/2 PMF. Results of the hydrologic and hydraulic analysis indicate the facility will pass and/or store only about 29 percent of the PMF prior to embankment overtopping at the low area in the main embankment crest. 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. Structural deficiencies observed by the inspection team included excessive settlement of both the main embankment and dike structures, general deterioration of the spillway and outlet works, and a general lack of routine maintenance . Historical correspondences also strongly questions the construction quality of the facility.
Download or read book National Dam Inspection Program Fawn Lake Dam NDI PA 00309 PA DER 52 168 Delaware River Basin Tributary West Falls Creek Pike County Pennsylvania Phase I Inspection Report written by Will M. Heiser and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fawn Lake Dam is a homogeneous earth embankment structure provided with a blanket drain and a rock toe. The design includes provision of a key trench. The embankment is approximately 400 feet long and has a maximum height of 41 feet. A 90-foot long overflow spillway is located between the embankment and the left abutment. The dam is provided with 5 feet of freeboard above the spillway, crest. Spillway training walls extend both upstream and downstream of the spillway, as shown on Plate 4. A concrete apron extends 100 feet downstream of the spillway, and varies in width from 90 feet at the spillway to 25 feet at the outlet channel. A trapezoidal outlet channel is lined with grouted riprap for approximately 250 feet downstream of the apron. A 24-inch diameter reinforced concrete pipe is provided as a low level outlet. Flow through the pipe is controlled by a gate valve at the upstream toe of the embankment. The operating stem expands from the valve to the top of dam, and is supported on concrete columns embedded in the embankment.
Download or read book National Dam Inspection Program North Lake Dam NDI I D Number PA 00268 PennDER I D Number 52 180 Delaware River Basin Branch of Hornbecks Creek Pike County Pennsylvania Phase I Inspection Report written by Bernard M. Mihalcin and published by . This book was released on 1981 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: North Lake Dam is located on a branch of Hornbecks Creek in Delaware Township, Pike County, Pennsylvania. The facility is located approximately 1,500 feet upstream and west of wild Acres Lake, and about five miles from U.S. Route 209 which parallels the Delaware River in this area. Observations made during the visual inspection indicate the embankment is in fair condition, but in need of general maintenance. No evidence of seepage through the downstream embankment face, sloughing, erosion or animal burrows was observed. The embankment crest is noticeably low (in excess of 1-foot) near the spillway relative to the remainder of the crest. About two-thirds of the embankment is overgrown along an area extending approximately 400 feet to the right of the spillway. The vegetation is characterized as primarily brush and high weeds with clumps of small trees strewn throughout. In contrast, much of the embankment crest and upstream face are bare and unprotected with only light vegetation visible. Several long tire ruts scar the crest near the spillway. A small area characterized by swamplike vegetation is located about 350 to 375 feet from the right abutment along the downstream embankment toe. Seepage was observed at the downstream embankment toe near the outlet conduit flowing at a rate of about two to three gpm. The flow is suspected of being either seepage through the embankment foundation, or perhaps drainage from a concealed toe drain. A precise assessment of the condition is difficult without adequate design data are drawings.
Download or read book National Dam Inspection Program Lake Russell Dam NDI I D Number PA 00314 PennDER I D Number 52 133 Delaware River Basin Freeling Run Pike County Pennsylvania Phase I Inspection Report written by Bernard M. Mihalcin and published by . This book was released on 1981 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual inspection, operational history, and available engineering data, the dam is considered to be in fair condition. The size classification of the facility is small and the hazard classification is considered to be high. In accordance with the recommended guidelines, the Spillway Design Flood (SDF) ranges between the 1/2 PMF (Probable Maximum Flood) and the PMF. Due to the high potential for damage to downstream structures and possible 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 50 percent of the PMF prior to embankment overtopping at the low area in the embankment crest. Consequently, the spillway is assessed as being inadequate, but not seriously inadequate. Recommended owner procedures are listed.
