Download or read book National Dam Safety Program Martin Dunham Reservoir Dam Inventory Number NY 672 Lower Hudson River Basin Rensselaer County New York Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examination of available documents and a 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 need to be evaluated and remedied. The most serious deficiency noted was a large wet area near the right abutment contact at the downstream toe of the main embankment. The ground in this area was very soft and there was minor sloughing of the embankment slope, as well. Two smaller wet areas were also observed. One of these was near the downstream toe at the left end of the main embankment and the other was beyond the toe of the spillway dike. Investigations into the causes and possible treatments of these wet areas should be commenced within 3 months of the date of notification of the owner. Remedial measures on these areas should be completed within 12 months. The hydrologic/hydraulic analysis performed indicates that the spillway does not have sufficient capacity to discharge the peak outflow from one-half the Probable Maximum Flood (PMF). However, spillway discharges occurring during large storm events will cause water surface elevations in the downstream hazard area to rise to flood levels. A dam failure resulting from overtopping would not significantly increase the hazard to loss of life from that which would exist just prior to an overtopping failure. Therefore, the spillway is assessed as inadequate.

Download or read book Lower Hudson River Basin Martin Dunham Reservoir Dam Rensselaer County New York Inventory No N Y 672 written by United States. Army. Corps of Engineers. New York District and published by . This book was released on 1981 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 1981 with total page 196 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 1982 with total page 1468 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 199? with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Dam Safety Program Melzingah Reservoir Dam Inventory Number NY 032 Lower Hudson River Basin Dutchess County New York Phase I Inspection Report written by Granville Kester (Jr) and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Melzingah Reservoir Dam on Gordons Brook, a tributary of the Hudson River, is 2 miles south of Beacon, New York. Melzingah Reservoir is one of three reservoirs used as a water supply for the City of Beacon, New York. Visual inspection revealed several deficiencies in this structure. The following items were noted: There are two large seeps at the base of the spillway; Water was flowing (3-5 gpm) from beneath the spillway; Five minor seeps were found 3 to 7 feet above the toe of the dam between the spillway and left abutment; Trees and brush are growing along the toe of the dam; There are small trees growing in the discharge channel; The gunite surface of the dam is deteriorating and is cracked over the entire upstream and downstream faces; An irregularity or 'bump' in the gunite surface was observed on the downstream face of the dam, approximately 200 feet from the left abutment; The junction of the 24-inch pipe and the 12-inch water supply line is leaking, and A construction joint has deteriorated on the upstream crest of the dam approximately 75 feet from the left abutment, creating a void approximately 4 inches deep, 2 feet long, and 2 feet wide.

Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1982 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Dam Safety Program Altamont Main Reservoir Dam Inventory Number N Y 126 Lower Hudson River Basin Albany County New York Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dam is located on an unnamed tributary of the Bozen Kill, a tributary of the Normans Kill and the Lower Hudson River, approximately 2.3 miles west of the Village of Altamont. The dam provides storage for the supply of water to the Village of Altamont. The problem areas observed during the inspections and the recommended remedial actions are as follows: Cracking and movement of the right spillway chute wall was observed. Removal of backfill, installation of weeps and stiffening of the wall should control this problem; Seepage was observed resulting from deterioration of the construction joints and cracking of the spillway concrete. Vegetation was also noted growing in the joints of the spillway chute slabs. All construction joints require cleaning and recaulking to reduce seepage and inhibit infiltration through the spillway chute and core wall; Cracking of the exposed core wall, spillway buttresses, return walls and spillway chute slabs were observed. These areas require repair. Monitor the deterioration of the catwalk and repair as required, and Monitor the seepage observed at the base of the spillway chute and at the reservoir drain outlet. If seepage increases significantly, investigate and repair.

Download or read book National Dam Safety Program Goshen Reservoir Number 1 Dam Inventory Number N Y 488 Lower Hudson River Basin Orange County New York Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 100 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 documents and the visual inspection of the Goshen Reservoir did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some problem areas which require additional studies and remedial work. The most serious of these deficiencies are the two areas of seepage on the downstream slope of the dam. First is at the end of a grouted stone spillway channel and the second is at the toe in the center of the dam. It is recommended that within six months from notification, an engineering investigation is initiated to determine the sources of the seepage found. Using the Corps of Engineers' screening criteria for the initial review of spillway adequacy, it has been determined that the embankment would be overtopped by all storms in excess of 51% of the Probable Maximum Flood (PMF). Therefore, the spillway is adjudged as 'inadequate.' (Author).

Download or read book National Dam Safety Program Delmar Reservoir Number 1 Dam Inventory Number N Y 1401 Lower Hudson River Basin Albany County New York Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 109 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 documents and visual inspection of the Delmar Reservoir No. 1 Dam did not reveal conditions which constitute a hazard to human life or property. Since this is a storage reservoir with an embankment entirely surrounding the pond area, the hydraulic/hydrologic analysis was not performed in the usual manner of modeling a watershed area. The drainage area for this structure was limited to the reservoir itself. From normal water surface elevation to the top of the dam, the Probable Maximum Flood can safely be stored and discharged through the overflow pipe. Therefore, the spillway is therefore assessed as adequate. (Author).

Download or read book National Dam Safety Program Churchtown Dam Inventory Number NY 79 Lower Hudson River Basin Columbia County New York Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visual inspection of this dam and engineering analyses which have been performed revealed that several serious deficiencies exist with this structure. Structural stability analyses, based on available information, indicate that this dam is marginally stable under normal loading conditions and is unstable when subjected to severe loading conditions (such as flood flows or ice loading). Seepage noted under and through the structure, creating wet, soft areas along the downstream toe along both ends of the dam, adversely affect the stability of the structure. Immediately upon receipt of this notification, a system for providing around-the-clock surveillance of the dam during periods of unusually heavy precipitation should be developed and implemented. An emergency action plan for the notification of downstream residents should also be developed. It is recommended that within 3 months of the data of notification of the owner, investigations into the deficiencies on this structure should be commenced. Studies of the structural stability and seepage problems, including subsurface and structural explorations are necessary. Information obtained should be incorporated into a detailed stability evaluation.

Download or read book National Dam Safety Program Mechanicville Reservoir Dam Inventory Number NY 1061 Upper Hudson River Basin Saratoga County New York Phase I Inspection Report written by George Koch and published by . This book was released on 1981 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mechanicville Reservoir Dam is an earth dam having a drop inlet spillway containing three discharge conduits plus a smaller cast-iron standpipe leading to a water supply conduit. The embankment is 380 feet long and about 30 feet high. Using the Corps of Engineers' Screening Criteria for initial review of spillway adequacy, it has been determined that the dam would be overtopped by all storms exceeding 20% of the Probable Maximum Flood (PMF) inflows.

Download or read book National Dam Safety Program Arthurs Pond Dam Inventory Number NY 490 Lower Hudson River Basin Orange County New York Phase I Inspection Report written by Granville Kester (Jr) and published by . This book was released on 1981 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arthurs Pond Dam is located on an unnamed tributary to Moodna Creek, approximately 3500 feet upstream of Aleck Meadow Reservoir Dam, in Orange County, New York. Arthurs Pond Dam is used to impound water for the Village of Cornwall-on-the-Hudson's water supply. Visual inspection revealed several deficiencies in this structure. The following items were noted: The cement joints of the spillway wing walls are badly deteriorated; A stone is missing from the right downstream side of the spillway near the top of the right wing wall; On the masonry portion of the dam, the cemented joints of the top few courses of stones are deteriorated; One of the stones is missing from the top of the downstream face; The masonry wall above the outlet works has deteriorated; Two small seeps were found in the masonry wall below the crest of the weir; three other small seeps were found on the downstream face of the dam. A small wet area was observed at the toe of the left section of the embankment; The stumps and root systems of several large trees are present in the downstream embankment. One of the stumps is partly uprooted; and There are fallen trees and other debris in the spillway discharge area.

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.

Download or read book National Dam Safety Program Vly Creek Dam Inventory Number NY 96 Lower Hudson River Basin Albany County New York Phase 1 Inspection Report written by George Koch and published by . This book was released on 1978 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Vly Creek Dam is composed of a 24.5 feet high and 338 feet long earth embankment dam with spillway, and a 39.5 feet high and 1720 feet long earth embankment dike with control tower for water supply regulation. Visual inspection did not reveal conditions that are considered to be unsafe. The total discharge capacity of the spillway is adequate to pass half the Probable Maximum Flood (PMF) regardless of the flashboards. The spillway is also capable of discharging PMF without flashboards, but not with flashboards.

Download or read book National Dam Safety Program Glenham Dam Inventory Number N Y 72 Lower Hudson River Basin Dutchess County New York Phase I Inspection Report written by Granville Kester (Jr) and published by . This book was released on 1981 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examination of available documents and visual inspection of the dam and appurtenant structures did not reveal any conditions which constitute an immediate hazard to human life or property. Using the Corps of engineers' screening criteria, it has been determined that the dam would be overtopped for all storms exceeding 33 percent of the Probable Maximum Flood (PMF). Therefore, the spillway is adjudged as 'seriously inadequate' and the dam is assessed as 'unsafe, non-emergency.' Structural stability analyses based on available information, indicate that factors of safety against overturning are generally low, and the locations of the resultants fall outside of the middle 1/3. The factor of safety against sliding was less than the recommended value of 3 for Cases 3 and 4. Therefore, when the dam is subjected to severe loading conditions such as a 1/2 PMF of PMF event, the factors of safety fall to below critical levels.

Download or read book National Dam Safety Program Cornwall Upper Reservoir Dam Inventory Number NY 604 Lower Hudson River Basin Orange County New York Phase I Inspection Report written by Granville Kester (Jr) and published by . This book was released on 1981 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cornwall Upper Reservoir Dam, located on an unnamed tributary of Moodna Creek, is 2 miles south of Cornwall-on-the-Hudson, New York. The dam and reservoir are used for water supply. The visual inspection revealed several deficiencies in this structure. The following items were noted: The left spillway training wall and the adjacent crest elevation are 0.9 feet below the average crest of the dam; Superintendent Ralph Smith reported seepage near a large tree (24-inch diameter) on the downstream face near the left abutment of the dam. Some seepage was observed in this area, but the source could not be determined; Four small local depressions along the crest of the dam; Trees are located in the discharge channel immediately downstream from the spillway; On the downstream slope, there are four or five tree trunks with diameters 4 to 8 inches. On the downstream slope there are a large number of trees below the road; The masonry portion of th left spillway wall has collapsed for approximately 3 feet long at the crest of the spillway weir; A large number of rodent holes are scattered on the downstream face of the dam; and There is a small eroded area on the downstream face of the dam near the left abutment.