National Dam Safety Program. Brisentine's Dam (Inventory Number VA 14720) James River Basin, Prince Edward County, Commonwealth of Virginia. Phase I Inspection Report PDF Download

Author: Michael Baker (III.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 46

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Book Description
Brisentine's Dam is an earthfill embankment 28.4 feet high and 3550 feet long, with an 80 foot wide vegetated earth emergency spillway located adjacent to the left abutment. Brisentine's Dam is a side-hill embankment and the embankment forms the entire eastern and southern sides of Brisentine's Pond. The principal spillway is a 6 inch diameter corrugated metal pipe serving as a riser. The reservoir inlet is a 15 inch diameter corrugated metal pipe located at the western end of the reservoir. The dam, located approximately 9.5 miles west of Farmville, Virginia, is used for recreation. Brisentine's Dam is a 'small' size - 'significant' hazard structure as defined by the Recommended Guidelines for Safety Inspection of Dams. Using the Corps of Engineer's screening criteria for initial review of spillway adequacy, the 100-year flood was selected as the spillway design flood (SDF). The SDF was routed through the reservoir and found to reach a maximum water surface elevation 2.5 feet below the minimum top of dam. The spillway is capable of passing up to 60 percent of the Probable Maximum Flood without overtopping the crest of the dam. The spillway is adjudged as adequate.

Author: James A. Walsh
Publisher:
ISBN:
Category :
Languages : en
Pages : 53

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Fleming Dam is an earthfill embankment 29.4 feet high and approximately 423 feet long. The principal spillway consists of a 36 inch diameter corrugated metal pipe (CMP) riser connected to a 24 inch diameter CMP outlet. The emergency spillway is a 50 foot wide vegetated earth channel adjacent to the right abutment. The dam, located on Maxey Mill Creek approximately 3.7 miles northeast of Cumberland, Virginia, is used for recreation and as a stock pond. The dam is owned by Mr. John T. Clayton of Cumberland, Virginia. Fleming Dam is a 'small' size - 'significant' hazard structure as defined by the Recommended Guidelines for Safety Inspection of Dams. Visual inspection and office analyses indicate deficiencies requiring further investigation and remedial treatment. A stability check is not required. Using the Corps of Engineers' screening criteria for initial review of spillway adequacy, the 100-year flood was selected as the spillway design flood (SDF). The spillway is capable of passing up to 45 percent of the SDF or 8 percent of the PMF without overtopping the dam. Overtopping flows during the SDF are not considered detrimental to the embankment. The spillway is adjudged as inadequate. The spillway is not adjudged as seriously inadequate since dam failure from overtopping would not significantly increase the hazard to loss of life downstream from the dam over that which would exist just before overtopping failure.

Author: Boris O. Taran
Publisher:
ISBN:
Category :
Languages : en
Pages : 50

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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: James A. Walsh
Publisher:
ISBN:
Category :
Languages : en
Pages : 68

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Book Description
Little Creek Reservoir Dam is an earthfill embankment 67.0 feet high and approximately 1,900 feet long. The dam has a drop-inlet spillway consisting of a 13 foot by 18 foot concrete riser with a 6 foot diameter concrete outlet pipe. The dam, located near Toano, Virginia, is used for water supply by the City of Newport News, Virginia. The dam is owned by the City of Newport News, Virginia. Little Creek Reservoir Dam is an 'intermediate' size - 'significant' hazard structure as defined by the Recommended Guidelines for Safety Inspections of Dams. The dam and appurtenant structures were found to be generally in good overall condition. Visual inspection and office analyses indicate deficiencies requiring remedial treatment. A stability check is not required. Using the Corps of Engineers' screening criteria for initial review of spillway adequacy, the Probable Maximum Flood (PMF) was selected as the spillway design flood (SDF) for Little Creek Reservoir Dam. The spillway is capable of passing up to 88 percent of the PMF without overtopping the dam. Despite the inability of the spillway to pass the SDF, the depth, duration, and rate of overtopping flows are not considered detrimental to the embankment.

Author: James A. Walsh
Publisher:
ISBN:
Category :
Languages : en
Pages : 49

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Book Description
Sunken Meadow Dam is an earthfill embankment approximately 9.1 feet high and 930 feet long. The spillway consists of a 27 foot long broad-crested weir, a concrete well, and a triple 4 foot by 5 foot reinforced concrete box culvert under the embankment, adjacent to the left abutment. The dam is located approximately 1.7 miles east of Claremont, Virginia. The dam itself is owned by the Virginia Department of Highways and Transportation. The reservoir is owned by Mrs. Mable K. Costenbader, and is used for recreation. Sunken Meadow Dam is an 'intermediate' size - 'high' hazard structure as defined by the recommended Guidelines for Safety Inspection of Dams.

Author: James A. Walsh
Publisher:
ISBN:
Category :
Languages : en
Pages : 70

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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 : 41

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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: michael Baker (III.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 63

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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: Paul Seiler
Publisher:
ISBN:
Category :
Languages : en
Pages : 62

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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 : 63

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Book Description
Salisbury Lake Dam is an earthfill embankment with a compacted clay core, approximately 1020 feet long and 37.3 feet high. The Dam is situated on Falling Creek, approximately 1.0 miles north of Midlothian, Virginia, and is used for recreational purposes by the owner, the Salisbury Lake Property Owners Association. Salisbury Lake Dam is a 'small' size - 'high' hazard structure as defined by the Recommended Guidelines for Safety Inspection of Dams. Deficiencies found during the field inspection and office analyses will require remedial treatment. A stability check is not required. Using the Corps of Engineers' screening criteria for initial review of spillway adequacy, the PMF was selected as the SDF for the 'small' size - 'high' hazard classification of Salisbury Lake Dam. The dam would be overtopped by the SDF, and the depth, duration, and rate of overtopping flows are considered detrimental to the embankment. The spillways are capable of passing only 30 percent of the PMF. The spillway is adjudged as seriously inadequate, since dam failure from overtopping would significantly increase the hazard to loss of life downstream from the dam over that which would exist just before overtopping failure.