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National Dam Safety Program Smith Mills Reservoir Dam Inventory Number Ny 786 Lake Erie Basin Chautauqua County New York Phase 1 Inspection Report
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Book Synopsis National Dam Safety Program. Smith Mills Reservoir Dam (Inventory Number NY-786), Lake Erie Basin, Chautauqua County, New York. Phase 1 Inspection Report by :
Download or read book National Dam Safety Program. Smith Mills Reservoir Dam (Inventory Number NY-786), Lake Erie Basin, Chautauqua County, New York. Phase 1 Inspection Report written by and published by . This book was released on 1980 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The examination of documents and visual inspection of Smith Mills Reservoir Dam and appurtenant structures, did not reveal conditions which constitute an immediate hazard to human life or property. The dam, however, has a number of problem areas which require investigation and remedial action. These areas are as follows: The spillway is inadequate for all storms in excess of 1% of the PMF (Probable Maximum Flood). The spillway capacity for analysis purposes is 110 cfs before overtopping of the dam would occur. The PMF was calculated to be 25,300 cfs. The dam is overtopped by 7.4 feet during the 1.2 PMF and 12.7 feet during the PMF. The ability of the dam to withstand overtopping and the need to provide additional spillway capacity will have to be evaluated. The design and configuration of the dam is such that only a detailed analysis of the structural stability, which is beyond the scope of this report, will provide sufficient information to determine if overtopping of the dam will be detrimental to the stability of the structure. Therefore, a detailed structural stability investigation is required to determine the type and extent of required remedial measures. This analysis should be initiated as soon as possible with remedial action, as a result of this investigation, completed within the following year.
Book Synopsis Lake Erie Basin, Smith Mills Reservoir Dam, Chautauqua County, New York, Inventory No. N.Y. 786 by : United States. Army. Corps of Engineers. New York District
Download or read book Lake Erie Basin, Smith Mills Reservoir Dam, Chautauqua County, New York, Inventory No. N.Y. 786 written by United States. Army. Corps of Engineers. New York District and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1980 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1981 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1981 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis National Dam Safety Program. Findley Lake Dam (Inventory Number NY 752), Lake Erie Basin, Chautauqua County, New York. Phase 1 Inspection Report by :
Download or read book National Dam Safety Program. Findley Lake Dam (Inventory Number NY 752), Lake Erie Basin, Chautauqua County, New York. Phase 1 Inspection Report written by and published by . This book was released on 1980 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. The examination of the available documents and the visual inspection of the Findley Lake Dam did not reveal conditions which constitute an immediate hazard to human life or property. However, this dam has deficiencies which require further investigation and remedial action. Using the Corps of Engineers screening criteria for review of spillway adequacy, it has been determined that the dam would be overtopped for all storms exceeding approximately 20 percent of the PMF. The overtopping of the dam could cause the erosion of the embankment, especially around the outlet conduit, which would result in dam failure, thus significantly increasing the hazard to the loss of life, especially on the New York State highway which traverses its crest. To a lesser degree, there is also a potential loss of life by overtopping or breaching a downstream village street which is the only other connection between 2 halves of the Village. The spillway is, therefore, adjudged as 'seriously inadequate' and the dam is assessed as unsafe, non-emergency.
Book Synopsis National Dam Safety Program. Brocton Reservoir (Inventory Number NY 785), Lake Erie Basin, Chautauqua County, New York. Phase I Inspection Report by :
Download or read book National Dam Safety Program. Brocton Reservoir (Inventory Number NY 785), Lake Erie Basin, Chautauqua County, New York. Phase I Inspection Report written by and published by . This book was released on 1980 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some deficiencies which require further investigation and remedial action. Using the Corps of Engineers screening criteria for review of spillway adequacy, it has been determined that the dam would be overtopped for all storms exceeding approximately 52 percent of the PMF. The overtopping of the dam could cause the erosion of the west embankment-spillway contact and downstream face of the west embankment resulting in spillway failure, thus increasing the hazard to the loss of life downstream. The spillway is, therefore, considered to be 'inadequate'. Structural stability analysis based on available information and the visual inspection indicates that the stability of the spillway section against overturning is inadequate for the loading conditions of maximum ice load at normal pool as well as one half and full PMF. A wet area, detected during the visual inspection(s) along the toe of the east embankment could, depending on the source of the wet area, affect the stability of the east embankment.
Book Synopsis National Dam Safety Program. Fredonia Reservoir (Inventory Number NY 749), Lake Erie Basin, Chautauqua County, New York. Phase I Inspection Report by : Bent L. Thomsen
Download or read book National Dam Safety Program. Fredonia Reservoir (Inventory Number NY 749), Lake Erie Basin, Chautauqua County, New York. Phase I Inspection Report written by Bent L. Thomsen and published by . This book was released on 1980 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. Examination of available documents and a visual inspection of the dam revealed conditions which if not corrected constitute a hazard to human life or property. Using the Corps of Engineers screening criteria for review of spillway adequacy, it has been determined that the dam would be overtopped by all storms exceeding approximately 34 percent of the PMF. The overtopping of the dam could cause erosion in the notched earthen section adjacent and parallel to the concrete Ogee weir resulting in possible undermining and failure of the spillway. Failure of the spillway would result in an increased hazard to the loss of life and property downstream. The spillway is, therefore, judged as 'seriously inadequate' and the dam is assessed as unsafe, non-emergency.
Book Synopsis National Dam Safety Program. Main Mill Dam (Inventory Number N.Y. 262), Lake Champlain Basin, Clinton County, New York. Phase I Inspection Report by : George Koch
Download or read book National Dam Safety Program. Main Mill Dam (Inventory Number N.Y. 262), Lake Champlain Basin, Clinton County, New York. Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. Visual inspection of this dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some deficiencies which require further engineering investigations and remedial work. Structural stability analyses performed for this report indicate that the spillway section is unstable for all conditions studied. The analysis was based on the limited information available and so may not reflect existing conditions. However, the analysis does indicate that there is a serious question concerning the stability of this dam and further investigations are required. It is recommended that within 3 months of the date of notification of the owner, investigations into the structural stability deficiencies should be commenced. These studies should include developing accurate cross sections of the dam, progressing subsurface explorations, and coring the dam. This information should then be incorporated into a detailed stability evaluation and the need for modifications to the structure should be determined. Required changes of the structure should be completed within 18 months.
Book Synopsis National Dam Safety Program. Warner Dam, Chautauqua Lake Outlet (Inventory Number NY 750) Allegheny River Basin, Chautauqua County, New York. Phase I Inspection Report by : Bent L. Thomsen
Download or read book National Dam Safety Program. Warner Dam, Chautauqua Lake Outlet (Inventory Number NY 750) Allegheny River Basin, Chautauqua County, New York. Phase I Inspection Report written by Bent L. Thomsen and published by . This book was released on 1980 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some deficiencies which require further investigation and remedial action. Using the Corps of Engineers screening criteria for review of spillway adequacy, it has been determined that the dam would be overtopped for all storms exceeding approximately 75 percent of the PMF. The spillway is, therefore, considered to be 'inadequate'. A review of the structural stability analysis performed by the designer indicated calculated safety factors against sliding to be less than recommended minimum value. A more detailed analysis which was performed as a part of this Phase I investigation produces a similar conclusion. Therefore, it is recommended that within 6 months of notification to the owner a detailed field investigation and monitoring program be undertaken to determine the actual hydrostatic uplift pressures along the base of the dam and that further detailed structural stability analyses be performed using this information. Debris should be removed from the upstream face of the dam as part of the routine maintenance program. Finally, leakage along the south side of the south tainter gate should be monitored on a daily basis with these observations documented in the dam operator's log book.
Book Synopsis National Dam Safety Program. Smith Reservoir Dam. NDI Number PA-00017. PennDER Number 25-28. Lake Erie Basin. West Branch of Sixteen Mile Creek, Erie County, Pennsylvania. Phase I Inspection Report by : John A. Dziubek
Download or read book National Dam Safety Program. Smith Reservoir Dam. NDI Number PA-00017. PennDER Number 25-28. Lake Erie Basin. West Branch of Sixteen Mile Creek, Erie County, Pennsylvania. Phase I Inspection Report written by John A. Dziubek and published by . This book was released on 1980 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smith Reservoir Dam was originally designed (1924) as a 35 foot high earth dam with an emergency spillway excavated in shale in the right abutment. In 1935, the spillway channel was excavated one foot lower and a 2 foot high concrete weir was added to the spillway crest. At the same time the embankment was raised 3 feet. The dam was built for water supply, for which it is still used today. The outlet works consist of two 12 inch cast-iron pipes through the embankment. A valve house is located on the downstream side of the embankment. Both 12 inch pipes can function as blow-offs or supply water into a 24 inch steel pipe leading to the water treatment plant downstream. Hydraulic/hydrologic evaluations revealed that the spillway will pass the 100-year flood without overtopping the dam. 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 Smith Reservoir Dam. The 100-year flood was chosen because the dam is on the low side of the 'Small' size category according to storage capacity. The spillway is therefore considered 'adequate'. The inspection and review of information revealed certain items of work which should be performed immediately by the owner.
Book Synopsis National Dam Safety Program. Springville Dam (Inventory Number N.Y. 704), Lake Erie Basin, Erie County, New York. Phase I Inspection Report by : Robert J. Farrell
Download or read book National Dam Safety Program. Springville Dam (Inventory Number N.Y. 704), Lake Erie Basin, Erie County, New York. Phase I Inspection Report written by Robert J. Farrell and published by . This book was released on 1981 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is located approximately 2 miles southwest of the Village of Springville, New York in the Town of Concord. The purpose of this dam is to generate hydroelectric power for the Village of Springville. The powerhouse is presently equipped with two 250KW generators. Visual observations made during the course of the inspection did not indicate any serious problems which would adversely affect the adequacy of the dam. The following is a summary of the problem areas encountered in order of importance: The gunite resurfacing of the west endwall of the spillway is highly deteriorated; Significant erosion exists along the east channel bank at the upstream end of the east endwall of the spillway; The west concrete core wall is heavily deteriorated; Rock erosion (undermining) is occurring along the downstream edge of the concrete apron, and Trees and vegetation cover the west embankment.
Book Synopsis National Dam Safety Program. Mead Reservoir Dam (Inventory Number N.Y. 237), Lake Champlain Basin, Clinton County, New York. Phase I Inspection Report by : George Koch
Download or read book National Dam Safety Program. Mead Reservoir Dam (Inventory Number N.Y. 237), Lake Champlain Basin, Clinton County, New York. Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visual inspection of this dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some deficiencies which require further engineering investigations. An area of concentrated seepage was noted at the downstream toe of the embankment. This area was approximately in line with the concrete gate house. Seepage was emerging at a rate estimated to be 10 to 20 gallons per minute. While only one area of concentrated seepage was noted, the entire area beyond the downstream toe was wet and swampy. Water was flowing out of the hillside in several areas immediately downstream of the embankment- right abutment contact. The structural stability analysis performed for the spillway section indicates that safety factors are below recommended values for all conditions studied. The sliding safety factors for severe loading conditions such as ice loading or flood flows indicate that the section would be unstable if subjected to these loads. It is recommended that within 3 months of the date of notification of the owner, investigations into the seepage and structural stability problems should be commenced. Remedial measures which are required based on these investigations should be completed within 18 months. The hydrologic/hydraulic analyses performed indicate that the outflows from all storms exceeding 54% of the Probable Maximum Flood (PMF) will result in flow over the emergency relief weir segment of the embankment. The dam does have the sufficient spillway capacity to pass one-half the PMF without the embankment being overtopped. Therefore, the spillway capacity is rated as inadequate.
Book Synopsis National Dam Safety Program. Lake Mahopac Dam (Inventory Number NY 1329) Lower Hudson River Basin, Putnam County, New York. Phase I Inspection Report by : Eugene O'Brien
Download or read book National Dam Safety Program. Lake Mahopac Dam (Inventory Number NY 1329) Lower Hudson River Basin, Putnam County, New York. Phase I Inspection Report written by Eugene O'Brien and published by . This book was released on 1981 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The examination of documents and the visual inspection of Lake Mahopac Dam and its appurtenant structures did not reveal conditions which constitute an immediate hazard to human life and property. Using Corps of Engineers screening criteria, it has been determined that the dam would be overtopped for all storms exceeding approximately 56 percent of Probable Maximum Flood (PMF). The maximum spillway discharge capacity is 7.9 percent of the PMF peak outflow. The spillway is, therefore, adjudged as 'inadequate'. The following remedial measures should be performed within 12 months from notification: (1) Missing portions of the upstream stone masonry wall should be repaired. (2) Brush and shrubbery should be removed from the embankment, spillway-reservoir drain structure and downstream channel. Provide a program of periodic cutting and or mowing of the dam surfaces, spillway-reservoir drain structure and the downstream channel. (3) The collected debris at the spillway-reservoir drain structure and in the downstream channel should be removed and hauled away from the dam. (4) A program of periodic inspections and maintenance of the dam and appurtenances should be provided, including yearly operation and lubrication of the reservoir drain and its control facilities. This information should be documented for future reference. (5) An emergency action plan for the project should be developed.
Book Synopsis National Dam Safety Program, Mill Pond Dam (Inventory Number NY 368), Lake Champlain Basin, Essex County, New York. Phase I Inspection Report by :
Download or read book National Dam Safety Program, Mill Pond Dam (Inventory Number NY 368), Lake Champlain Basin, Essex County, New York. Phase I Inspection Report written by and published by . This book was released on 1980 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. Several deficiencies were noted and these should be corrected within 6 months of the date of final approval of this report. Among the actions which should be taken are refilling the cribs which are missing material, repair of displaced timbers on the downstream face, replace broken timbers, repair of the valve on the drain, and repair of the spalling concrete on the wingwall which extends downstream of the north abutment. In addition, a detailed emergency action plan and warning system should be developed. This dam does not have sufficient spillway capacity to adequately discharge the peak outflow from one- half the PMF. The analysis indicates that the dam would be overtopped by all storms exceeding 15% of the PMF. However, the structural stability analysis indicates that the dam would be stable when subjected to the PMF storm event. Therefore, the spillway is assessed as being inadequate. The water surface level for either the PMF or one-half the PMF would result in flow around the northern end of the concrete wingwall which extends from the abutment of the dam. An accurate topographic survey should be performed where this end around flow is likely to occur.
Book Synopsis National Dam Safety Program. Lake Placid Village Dam. (Inventory Number NY 781), Lake Champlain River Basin, Essex County, New York. Phase I Inspection Report by : John B. Stetson
Download or read book National Dam Safety Program. Lake Placid Village Dam. (Inventory Number NY 781), Lake Champlain River Basin, Essex County, New York. Phase I Inspection Report written by John B. Stetson and published by . This book was released on 1980 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: The examination of documents and visual inspection of the dam and appurtenant structures did not reveal conditions which constitute an immediate hazard to human life or property. The dam, however, has a number of problem areas which require further investigation and remedial work. The structural stability analysis indicates that the dam is unstable when subjected to forces which could occur under the Probable Maximum Flood (PMF) loading condition. Unsatisfactory stability is indicated for the dam when subject to forces which could occur during the normal winter operations and the 1/2 PMF loading condition. A structural stability investigation should be started within six months to determine the characteristics of the uplift forces acting on the dam and to determine whether the foundation acts integrally with the dam section to resist overturning. Remedial work should be completed, depending on the results of the investigation, within two years. The hydrologic/hydraulic analysis establishes the spillway capacity as 10.7% of the Probable Maximum Flood (PMF). The dam will be overtopped by 10.0 feet and 4.8 feet during the PMF and 1/2 PMF respectively. The spillway is inadequate since failure of the dam during the 1/2 PMF event will not significantly increase the downstream hazard from that which would occur just prior to the dam failure.
Book Synopsis National Dam Safety Program. Lake Adirondack Dam (Inventory Number NY 621), Upper Hudson River Basin, Hamilton County, New York. Phase 1 Inspection Report by :
Download or read book National Dam Safety Program. Lake Adirondack Dam (Inventory Number NY 621), Upper Hudson River Basin, Hamilton County, New York. Phase 1 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: This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some deficiencies which need to be evaluated and remedied.
