National Dam Safety Program. Robertson Dam (Inventory Number VA 16303), James River Basin, Rockbridge County, State of Virginia. Phase I Inspection Report PDF Download
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Author: James A. Walsh Publisher: ISBN: Category : Languages : en Pages : 70
Book Description
Pursuant to Public Law 92-367, Phase I Inspection Reports are prepared under guidance contained in the recommended guidelines for safety inspection of dams, published by the Office of Chief of Engineers, Washington, D.C. 20314. The purpose of a Phase I investigation is to identify expeditiously those dams which may pose hazards to human life or property. The assessment of the general conditions of the dam is based upon available data and visual inspections. Detailed investigation and analyses involving topographic mapping, subsurface investigations, testing, and detailed computational evaluations are beyond the scope of a Phase I investigation; however, the investigation is intended to identify any need for such studies. Based upon the field conditions at the time of the field inspection and all available engineering data, the Phase I report addresses the hydraulic, hydrologic, geologic, geotechnic, and structural aspects of the dam. The engineering techniques employed give a reasonably accurate assessment of the conditions of the dam. It should be realized that certain engineering aspects cannot be fully analyzed during a Phase I inspection. Assessment and remedial measures in the report include the requirements of additional indepth study when necessary.
Author: James A. Walsh Publisher: ISBN: Category : Languages : en Pages : 70
Book Description
Pursuant to Public Law 92-367, Phase I Inspection Reports are prepared under guidance contained in the recommended guidelines for safety inspection of dams, published by the Office of Chief of Engineers, Washington, D.C. 20314. The purpose of a Phase I investigation is to identify expeditiously those dams which may pose hazards to human life or property. The assessment of the general conditions of the dam is based upon available data and visual inspections. Detailed investigation and analyses involving topographic mapping, subsurface investigations, testing, and detailed computational evaluations are beyond the scope of a Phase I investigation; however, the investigation is intended to identify any need for such studies. Based upon the field conditions at the time of the field inspection and all available engineering data, the Phase I report addresses the hydraulic, hydrologic, geologic, geotechnic, and structural aspects of the dam. The engineering techniques employed give a reasonably accurate assessment of the conditions of the dam. It should be realized that certain engineering aspects cannot be fully analyzed during a Phase I inspection. Assessment and remedial measures in the report include the requirements of additional indepth study when necessary.
Author: Boris O. Taran Publisher: ISBN: Category : Languages : en Pages : 50
Book Description
The Dam is an earthfill structure about 738 feet long and 40.5 feet high. The dam is classified as 'intermediate' on the basis of size, and given a hazard classification of 'significant' on the basis of downstream area development. The principal spillway consists of an octagonally shaped concrete riser with eight rectangular openings serving as drop inlets. The emergency spillway is an open concrete channel cut at the right abutment. The spillway will pass 41 percent of the PMF or 82 percent of the SDF without overtopping the crest of the dam. The spillway is adjudged inadequate but not seriously inadequate. The visual inspection revealed no apparent problems and there are no immediate needs for remedial measures.
Author: Boris O. Taran Publisher: ISBN: Category : Languages : en Pages : 41
Book Description
The dam is an earthfill structure about 800 feet long and 45.2 feet high. The dam is classified as an intermediate size dam with a significant hazard classification. The designed principal spillway is a 10-inch steel drop-inlet stand pipe located in the reservoir. Because of underlying cavernous limestone beneath the reservoir, the water level is considerably below the normal design pool. There are two emergency spillways. The left emergency spillway is an open channel spillway which is a low point in natural ground. The right emergency spillway is an open channel cut into natural ground. The spillways will pass the PMF without overtopping; therefore, the spillways are adjudged as adequate. The visual inspection revealed no apparent problems or remedial measures in need of immediate attention.
Author: Boris O. Taran Publisher: ISBN: Category : Languages : en Pages : 43
Book Description
The Dam is an earthfill structure about 1000 feet long and 23.3 feet high with a gravel roadway traversing the entire dam. The dam is classified as small on the basis of size, and given a hazard classification of significant on the basis of downstream area development. The principal spillway consists of a 42-inch diameter corrugated metal pipe (CMP) vertical riser connected to a 36-inch diameter CMP which passes through the dam at a low level. The emergency spillway is an open earth channel cut in the left abutment. The spillways will pass 10 percent of the PMF or 20 percent of the SDF without overtopping the crest of the dam. The spillway is adjudged inadequate but not seriously inadequate. The visual inspection revealed that there are no immediate needs for remedial measures, except for the monitoring of the spring beneath the primary spillway outlet. It is recommended that a regular maintenance and operations program be instituted with provisions for accurate records of all maintenance performed.
Author: michael Baker (III.) Publisher: ISBN: Category : Languages : en Pages : 63
Book Description
Pursuant to Public Law 92-367, Phase I Inspection Reports are prepared under guidance contained in the recommended guidelines for safety inspection of dams, published by the Office of Chief of Engineers, Washington, D.C. 20314. The purpose of a Phase I investigation is to identify expeditiously those dams which may pose hazards to human life or property. The assessment of the general conditions of the dam is based upon available data and visual inspections. Detailed investigation and analyses involving topographic mapping, subsurface investigations, testing, and detailed computational evaluations are beyond the scope of a Phase I investigation; however, the investigation is intended to identify any need for such studies. Phase I reports include project information of the dam and appurtenances, all existing engineering data, operational procedures, hydraulic/hydrologic data of the watershed, dam stability, visual inspection report and an assessment including required remedial measures.
Author: Boris O. Taran Publisher: ISBN: Category : Languages : en Pages : 40
Book Description
The Dam is an earthfill structure approximately 250 feet long and 26.1 feet high. The dam is classified as a small size dam with a significant hazard classification. The principal spillway is a concrete open channel located at the right abutment. The emergency spillway is a low area left of the dam used as an access road. The spillway is capable of passing 13 percent of the PMF without overtopping the crest of the dam. The spillway is adjudged as inadequate, but not seriously inadequate. The visual inspection revealed a seep on the downstream slope with evidence of piping. Also a shallow 12-foot wide depression was noted 40 feet right of the seep. It is recommended that a geotechnical engineering firm be retained within six months to evaluate the possible piping and the cause for the 12-foot wide depression. It is also recommended that within 12 months a regular maintenance program be initiated to maintain the integrity of the structure.
Author: James A. Walsh
Author: James A. Walsh
Author: 
Author: Boris O. Taran
Author: Boris O. Taran
Author: 
Author: Boris O. Taran
Author: 
Author: michael Baker (III.)
Author: 
Author: Boris O. Taran