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 Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Dam Inspection Program Knight Dam NDS I D Number 00395 DER I D Number 46 257 Delaware River Basin Perkiomen Creek Montgomery County Pennsylvania Phase I Inspection Report written by Mary F. Beck and published by . This book was released on 1980 with total page 86 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 a 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 Deep Creek Dam NDS I D Number PA 00200 DER I D Number 46 8 Delaware River Basin Deep Creek Montgomery County Pennsylvania Phase I Inspection Report written by Mary F. Beck and published by . This book was released on 1980 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deep Creek Dam is owned by the Montgomery County Commissioners and maintained by the Parks Department. The dam and reservoir are used for recreational purposes. The dam and its appurtenant facilities are considered to be in fair condition. The dam is classified as a Small size structure with a High hazard classification consistent with its potential in the event of sudden failure for extensive property and loss of life downstream along Perkiomen Creek. In accordance with criteria established by Federal (OCE) Guidelines, the spillway design flood for this 'Small' size dam and 'High' hazard classification is 0.5 to the full Probable Maximum Flood (PMF). As the total storage capacity is nearer the lower limited for the Small size classification, and as the watershed controlled by Deep Creek Dam is small compared to the watershed controlled by downstream knight Dam, the selected spillway design flood is 0.5 PMF. Hydrologic and hydraulic calculations indicate that the spillway structure is capable of discharging about 0.21 PMF without overtopping the embankment at the right abutment. If the right abutment and embankment were raised to the original design elevation, the spillway would be capable of discharging about 0.38 PMF without overtopping. The 0.4 PMF is judged to cause failure of the embankment by overtopping, but failure does not significantly increase the danger to human life or property; thus, the spillway rating for this structure is considered to be Inadequate but not Seriously Inadequate.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1979 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 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 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 National Dam Inspection Program Beaver Lake Lodge Dam NDI I D Number PA 00300 PennDER I D Number 52 93 Delaware River Basin Raymondskill 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 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose is to determine if the dam constitutes a hazard to human life or property. Beaver Lake Lodge Dam is located on Raymondskill Creek in Milford Township, Pike County, Pennsylvania. The visual inspection of the facility suggested that the dam and its appurtenances are in poor condition. The overall appearance of the facility suggests it to be in poor condition. Remedial measures are necessary to: (1) repair to deteriorated concrete spillways, (2) remove the trees and overgrowth from the embankment crest and slopes, (3) provide adequate erosion protection along the downstream embankment toe, and (4) restore the operability of the outlet conduit, or provide an alternate means of reservoir drawdown.
Download or read book National Dam Inspection Program Saw Mill Dam NDS ID PA 00324 DER ID 46 261 Delaware River Basin Saw Mill Creek Montgomery County Pennsylvania Phase I Inspection Report written by WOODWARD-CLYDE CONSULTANTS PLYMOUTH MEETING PA. and published by . This book was released on 1979 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Saw Mill Dam is a zoned earth embankment with an impervious core, an outer previous shell, a cutoff trench and drainage blanket and rock toe. These features are shown on Plate 3, entitled 'Typical Embankment Sections'. The dam is approximately 1,335 feet long and the height, measured from the crest to the principal spillway discharge pipe inlet, is 47 feet. Borrow materials were obtained from the spillway excavation and within the reservoir area. The core of the dam is composed of clayey materials derived from the borrow areas, and the shell is composed of more previous materials selectively excavated from the borrow pits. The 10 foot wide cutoff trench has 1H:1V side slopes and a grout cap at the base of the trench. The foundation was grouted using a single line grout curtain with six foot hole spacings. The average hole depth is 15 feet and the maximum hole depth is 30 feet. The upstream slope is 3H:1V, the lower two-thirds of the slope is protected with 18 inches of riprap over a 12-inch filter blanket and the upper portion is protected with grass. The downstream slope is 2.5H:1V and protected with grass.
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 Indian Lake Dam NDI ID Number PA 01041 DER ID Number 40 143 Delaware River Basin Shades Creek Luzerne County Pennsylvania Phase 1 Inspection Report written by and published by . This book was released on 1981 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this inspection is to determine if the dam constitutes a hazard to human life and property. The Dam's location is Bucks Township, Luzerne County. The overall appearance and general condition of the dam and appurtenances are fair. The spillway crest has been raised and the dam crest is two feet below design elevation. These and other noteworthy deficiencies noted. The reservoir pool was 3.5 feet below spillway crest (corewall) on the day of the initial inspection, 22 October 1980. The lake was purposely drawn down so that maintenance of the dam could be performed. On the date of the review inspection, the reservoir level was one foot above the spillway crest (corewall).
Download or read book National Dam Inspection Program Ingham Creek Aquetong Lake Dam NDI ID PA 00224 PA DER 9 49 Delaware River Basin Ingham Creek Pennsylvania Phase I Inspection Report written by Peter C. Johnson and published by . This book was released on 1981 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ingham Creek Dam, which impounds a private recreational lake, consists of an earth embankment approximately 645 feet long with a maximum height of 24 feet. The embankment has a variable top width averaging about 13 feet, a downstream slope averaging about 1.5H:1V and an unknown upstream slope below the water surface. The dam impounds a reservoir with a normal pool surface area of 12.4 acres and a storage capacity of 93 acre-feet. The spillway, located about 95 feet from the left abutment, consists of a rockfill covered with a concrete slab. It is 25 feet long at the crest, 21 feet long at the downstream end, and 25 feet wide. The spillway crest (Elev. 149.8) is one foot below the concrete spillway sidewalls. A wooden sluiceway structure with stoplogs, which is located about 50 feet left of the spillway sidewall, is 5 feet wide by 3 feet deep. It was once used to direct water to a mill downstream of the dam and is now in poor condition. The spillway Design Flood (SDF) chosen for this 'Small' size, 'Significant' hazard dam is the 100 year flood. The spillway is capable of discharging approximately 17 percent of the SDF prior to overtopping the low point of the top of the dam; therefore, it is classified 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 Quakake Dam NDI ID Number PA 00613 DER ID Number 13 11 Delaware River Basin Quakake Creek Carbon 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 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The visual inspection and review of available design and construction data indicate that Quakake Dam is in fair condition. The limited spillway capacity is the primary deficiency which causes concern for the safety of this facility. The dam in its present condition is considered to be unsafe, non-emergency. In accordance with the guidelines provided, the spillway design flood (SDF) ranges between 1/2 the PMF to the full PMF. Based on the size of dam, the SDF selected was 1/2 the PMF. The hydrologic and hydraulic computations indicate that the combination of reservoir storage and spillway discharge capacity will pass only 9% of the PMF prior to overtopping the embankment. Overtopping the dam could cause failure, which would lead to a significant increase in downstream loss of life and property damage. Therefore, the spillway for Quakake Dam is considered to be seriously inadequate.
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.
