Download or read book National Dam Inspection Program Beaver Dam NDI I D Number PA 00453 Pennder I D Number 65 7 Ohio River Basin Beaver Run Westmoreland County Pennsylvania Phase I Inspection Report written by GAI CONSULTANTS INC MONROEVILLE PA. and published by . This book was released on 1979 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beaver Dam is an earth embankment approximately 32 feet high and 385 feet long (including spillway). The dam is constructed with a masonry spillway located about 35 feet left of the right abutment. The crest of the spillway is 100 feet long and about 11 feet below the top of its wingwalls. Based on a visual inspection, operational history, and available engineering data, the dam is consisered to be in poor condition. The defunct facility has been essentially abandoned since 1952 and its reservoir is sediment filled. Results of the hydrologic and hydraulic analysis indicate that the facility is capable of passing and/or storing only 36 percent of the PMF without embankment overtopping. Structural deficiencies noted by the inspection team included substantial embankment overgrowth, an access road cut through the embankment near the left abutment, cracking of the masonry spillway wingwalls, and a sediment filled reservoir. Due to the seriously inadequate spillway and overall poor condition, the facility is considered unsafe but non-emergency as failure is not considered imminent.
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 National Dam Inspection Program Big Beaver Dam Pa No Name Number 14 NDI Number PA 00258 PennDER Number 4 11 Ohio River Basin Tributary of Clark s Run Beaver County Pennsylvania Phase I Inspection Report written by John A. Dziubek and published by . This book was released on 1980 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Big Beaver Dam is an earth embankment with a maximum height of 25 feet and a total length of 320 feet. The spillway, located at the right abutment, consists of a cut stone lined broad crested weir and chute. The spillway crest is 9.6 feet long perpendicular to the flow and 12 feet long parallel to the flow. The chute has an overall width of 10 feet and a length of 75 feet; the spillway crest is located 3.5 feet below the low spot of the crest of the dam. The outlet works for the dam consist of an 8 inch cast-iron pipe with the upstream end submerged approximately 30 feet out from the center line of the dam. The dam was found to be in fair overall condition at the time of inspection. The spillway will pass approximately 37 percent of the Probable Maximum Flood (PMF) before overtopping will occur.
Download or read book National Dam Inspection Program Beaver Run Dam NDI Number PA 484 Ohio River Basin Beaver Run Westmoreland County Pennsylvania Phase I Inspection Report written by GAI CONSULTANTS INC MONROEVILLE PA. and published by . This book was released on 1978 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual examination, as well as available engineering data, the dam is considered to be in good condition. Hydrologic and hydraulic calculations indicate that the facility can pass and/or store the flow resulting from the PMF. Additional calculations, however, indicated that if not properly vented, the morning glory spillway may pass through a period when a make and break siphoning action would attend flow. This action would be accompanied by surges at the inlet and outlet ends and by thumping and vibrations within the outlet. Since no design reports are available for the appurtenances, it is not known if this condition was considered during the design. Discussions with owners representatives and local residents also indicated that remedial repair to the outlet works was required at least once and possibly twice since construction. Consequently, it is recommended that a detailed hydraulic and hydrologic analysis be performed to accurately assess the present condition of the outlet and to make any modifications deemed necessary to insure that the outlet will perform adequately under all possible operating conditions.
Download or read book National Dam Inspection Program Four Mile Run Dam NDS I D Number PA 00457 PennDer I D Number 65 126 Ohio River Basin Four Mile Run Westmoreland County Pennsylvania Phase I Inspection Report written by Bernard M. Mihalcin and published by . This book was released on 1979 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: The visual inspection, operational history, and hydrologic/hydraulic analysis indicate the facility is in good condition. It is recommended that the owner: (a) Immediately fill and seal all cracks within the interior of the outlet conduit. (b) Specifically address the seepage condition observed to the right of the spillway in all future inspections and note any turbidity or changes in the rate of flow. (c) Re-evaluate and revise the present standard flood emergency procedures in accordance with, but not limited to, the following items: (1) Include a definite procedure of notifying downstream residents of a possible emergency. (2) Provide for an alternate means of communication in the event telephone lines become inoperative. (3) Provide for around-the-clock surveillance of the facility during periods of unusually heavy precipitation. (d) Provide additional riprap protection along the right sidewall of the spillway approach channel.
Download or read book National Dam Inspection Program PA 657 Dam Acme Dam NDI I D Number PA 00828 PennDER I D Number 65 133 Ohio River Basin Jacobs Creek Westmoreland County Pennsylvania Phase I Inspection Report written by Bernard M. Mihalcin and published by . This book was released on 1979 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual inspection, past performance, and available engineering data, the facility is considered to be in good condition. The size classification of the facility is intermediate and the hazard classification is considered to be high. The emergency spillway is capable of discharging the peak inflow resulting from a storm of PMF intensity and is, therefore, considered adequate. It is recommended that the owner: (a) Repair the damaged pond drain gate control and replace the missing manhole cover atop the service spillway riser. Consideration should be given to redesigning the gate control mechanism to protect it from future vandalism. (b) Consult with the U.S.D.A., Soil Conservation Service, to assess the erosion on the upstream slope in the area of the service spillway riser and implement any remedial measures deemed necessary. (c) Curtail the unauthorized vehicular travel across the embankment and repair and reseed any damaged (bare) areas. If control of unauthorized travel is not practical, some provision should be made to protect the embankment from rutting and erosion by placing a layer of gravel or stone across the crest. (d) Develop a formal operation and maintenance manual to ensure the continued proper care of the facility. In addition, a formal warning system should be implemented which provides detailed procedures to protect the lives and property of downstream residents. Included in the plan should be provisions for around-the-clock surveillance of the facility during periods of unusually heavy percipitation.
Download or read book National Dam Inspection Program Greenwalt Dam NDI Number PA 00476 PennDER Number 65 52 Ohio River Basin Crabtree Creek Westmoreland County Pennsylvania Phase I Inspection Report written by and published by . This book was released on 1980 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a review of available design information and visual observations of conditions as they existed on the date of the field inspection, the general condition of the Greenwalt Dam is considered to be in an unsafe, non-emergency condition.
Download or read book National Dam Inspection Program Little Blue Run Dam NDI ID Number PA 917 DER ID Number 4 49 Ohio River Basin Little Blue Run Beaver County Pennsylvania Phase I Inspection Report written by Lawrence D. Anderson and published by . This book was released on 1979 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the evaluation of the existing conditions on March 14 and April 16, 1979, the condition of Little Blue Run Dam is considered to be good. No conditions were noted at this time that would significantly affect the structural performance of the dam. The flood discharge facilities for the dam were designed to pass the probable maximum flood (PMF) without overtopping the embankment. Therefore, according to the recommended criteria, the flood discharge facilities of the dam are adequate. Presently, the pool elevation is approximately 170 feet below the dam crest level. The pool elevation is expected to reach spillway crest level in about the year 2010. The following recommendations should be implemented on a continuing basis: (1) The cracking observed on the crest should continue to be evaluated by the design engineers. Also, attention should be given to the slump and seepage observed on the left abutment. Erosion ditches on the right abutment should be filled; and (2) A formal warning system should be developed to alert the downstream residents in the event of emergencies.
Download or read book National Dam Inspection Program Upper Bridgeport Dam NDI I D Number PA 00465 Pender I D Number 65 6 Ohio River Basin Jacobs Creek Westmoreland County Pennsylvania Phase I Inspection Report written by GAI CONSULTANTS INC MONROEVILLE PA. and published by . This book was released on 1979 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upper Bridgeport Dam is an earth embankment approximately 1,020 feet long (including spillways), with a maximum height of 21 feet. The embankment is divided into three sections by two spillways. The service spillway is a combination masonry and concrete trapezoidal-shaped weir structure with a 101-foot long crest located about 140 feet from the left abutment. The emergency spillway is a concrete broad-crested weir structure with a 250-foot crest length located about 320 feet to the left of the right abutment. Based on the visual inspection, operational history, and available engineering data, the dam is considered to be in poor condition. The facility has been essentially abandoned by the current owner and has not been in operation or maintained since 1972. Results of the hydrologic and hydraulic analysis indicate that the facility can accommodate approximately 20 percent of the PMF before overtopping of the embankment occurs. Since the dam's hazard rating is high, and embankment failure would result in an increase in the potential for loss of life downstrean from the dam, the present spillway system is assessed as being seriously inadequate.
Download or read book National Dam Inspection Program Gilkerson Dam NDI Number PA 01122 PennDER Number 65 8 Ohio River Basin Unnamed Tributary to Beaver Run Westmoreland County Pennsylvania written by BAKER (MICHAEL) JR INC BEAVER PA. and published by . This book was released on 1980 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gilkerson Dam is classified as a 'Small' size - 'High' hazard dam. The dam was found to be in very poor overall condition at the time of the 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 pass approximately 40 percent of the Probable Maximum Flood (PMF) before overtopping will occur. A spillway design flood (SDF) in the range of the 1/2 Probable Maximum Flood (1/2 PMF) to the PMF is required for Gilkerson Dam. The 1/2 PMF was chosen because the dam is on the low and end of the 'Small' size category. Because the total duration and maximum depth of overtopping during the 1/2 PMF (1.5 hours and 0.21 foot, respectively) did not meet the estimated limiting criteria for failure of the dam (2 hours and 1.0 foot), the spillway is assessed as 'inadequate' but not 'seriously inadequate'. It is recommended that the owner immediately initiate an engineering study to develop recommendations for remedial measures to reduce the overtopping potential of the dam.
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Dam Inspection Program Breskin Dam Number 2 NDI Number PA 00485 PennDER Number 65 134 Ohio River Basin Fourmile Run Westmoreland County Pennsylvania Phase I Inspection Report written by James P. Hannan and published by . This book was released on 1980 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a review of available design information and visual observations of conditions as they existed on the date of the field inspection, the general condition of the Breskin Dam No. 2 is considered to be good. The structure is classified as an 'intermediate' size, 'high' hazard dam and the Spillway Design Flood is the Probable Maximum Flood. The spillway capacity was found to be 'inadequate' because the non-overtopping flood discharge capacity, as estimated using the HEC-1 computer program, was found to be 42 percent of the PMF. The spillway is not 'seriously inadequate', because in the opinion of the evaluating engineer, the dam will not fail at 50 percent of the PMF.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1980 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Dam Inspection Program Whitney Ridge Dam NDI Number PA 00474 PennDER Number 65 24 Ohio River Basin Westmoreland County Commonwealth of Pennsylvania Phase I Inspection Report written by James P. Hannan and published by . This book was released on 1980 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a review of available design information and visual observations of conditions as they existed on the date of the field inspection, the general condition of the Whitney Ridge Dam is considered to be poor. This assessment is based on visual observations and hydraulic calculations that indicated: (1) A possible inadequate margin of safety against slope failure as indicated by evidence of high ground water in the embankment. (2) Inability to locate outlet works system components or operate observed controls. (3) Poor hydraulic conditions at the Principal Spillway including dense tree and brush growth in the spillway channel and deterioration of the concrete overflow weir and channel bottom paving. (4) 'Inadequate' spillway capacity as determined using the HEC-1 Computer Program. The structure is a 'small' size, 'high' hazard dam.
Download or read book National Dam Inspection Program Keystone Dam NDI Number PA 480 Ohio River Basin McCune Run Westmoreland County Pennsylvania Phase I Inspection Report written by GAI CONSULTANTS INC MONROEVILLE PA. and published by . This book was released on 1978 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Dam Inspection Act, Public Law 92-367, authorized the Secretary of the Army, through the Corps of Engineers, to initiate a program of inspection of dams throughout the United States. The purpose is to determine if the dam constitutes a hazard to human life or property.
Download or read book National Dam Inspection Program Derry Rod and Gun Club Dam NDI ID Number PA 518 DER ID Number 65 143 Ohio River Basin Miller Run Westmoreland County Pennsylvania Phase I Inspection Report written by and published by . This book was released on 1981 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Dam appears to be in fair condition, with the condition of the operating facilities being considered as poor. The maintenance of the dam and operating facilities is considered poor. The condition of the principal spillway discharge line is in a visibly deteriorating condition at the outlet. A wet area was observed on the downstream slope of the dam. The condition of the wet area did not appear to pose an immediate problem relative to the stability of the structure. Groundwater and surface runoff near the right abutment has caused erosion gullies along the toe of the dam, adjacent to the right abutment contact. The erosion could potentially erode the toe of the dam, and the runoff should be diverted away from the toe of the dam. A low spot was noted during the inspection, and the top of dam should be filled to an elevation consistent with the top of slope at the emergency spillway at the left abutment. The drainline valve has not been operated in several years. The control stem for the valve reportedly is located in the reservoir, but the stem was not visible during the inspection period.
Download or read book National Dam Inspection Program Beaver Pond Dam NDI I D Number PA 00408 PennDER I D Number 52 13 Delaware River Basin Dingmans 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 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a visual inspection, operational history, and hydrologic/hydraulic analysis, the dam is considered to be in good 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 hydrologic and hydraulic analyses indicate the facility will pass and/or store approximately 40 percent of the PMF prior to embankment overtopping at the low area in the embankment crest (elevation 1177.4). 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 by the recommended guidelines, the spillway is considered to be seriously inadequate and the facility unsafe, non-emergency. Recommendations for owner action are listed.
