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Full-Text Articles in Engineering
Faa Storm Water Program, W. H. Espey Jr., Raymond Rose, George I. Legarreta
Faa Storm Water Program, W. H. Espey Jr., Raymond Rose, George I. Legarreta
United States Department of Transportation -- Publications & Papers
United states Environmental Protection Agency (EPA) promulgated regulations in November 16, 1991 pursuant to the Clean Water Act in the issuance of National Pollution Discharge Elimination System (NPDES) permit application regulations for storm water discharge. These regulations concern certain municipal and industrial activities. Air transportation facilities are included in the industrial activity category. The EPA storm water regulations specifically target airport deicing operations as an industrial activity. These regulations may increase Airport Improvement Program (AlP) trust fund expenditures for storm water control improvements. The Federal Aviation Administration (FAA), therefore, initiated a storm water program to assist airport operators in complying …
Magnitude Of The Scour Evaluation Program, Lawrence J. Harrison
Magnitude Of The Scour Evaluation Program, Lawrence J. Harrison
United States Department of Transportation -- Publications & Papers
Tens of millions of dollars have been spent over the years on Federal-aid highway system bridges damaged by floods. Nearly 500,000 of the 577,000 existing bridges within the National Bridge Inventory are over waterways. The screening of these bridges over waterways for scour susceptibility will be completed, for the most part, by October 1992. The Federal Highway Administration has established January 1997 as the completion date for the scour evaluations of all existing bridges identified as scour susceptible. A cost-effective means of determining the specifics of bridges with unknown foundations is not currently available. Pending the development of technology to …
Scour Evaluations Of Existing Bridges, Michael J. Fraher
Scour Evaluations Of Existing Bridges, Michael J. Fraher
United States Department of Transportation -- Publications & Papers
The collapse of the Schoharie Creek Bridge on April 5, 1987 was a catastrophic instantaneous failure caused by scour of the bridge foundation. This particular collapse received wide media attention due to a home video of part of the collapse, the location on the New York State Thruway and the tragic loss of life. This particular collapse was not the first major interstate highway bridge failure attributed to scour of foundations. It is fair to say, however, that this was the event that finally brought stream stability and bridge scour issues to the attention of highway administrators and bridge engineers …
Merging Field & Laboratory Bridge Scour Data, J. Sterling Jones, Peggy A. Johnson, Arthur C. Parola
Merging Field & Laboratory Bridge Scour Data, J. Sterling Jones, Peggy A. Johnson, Arthur C. Parola
United States Department of Transportation -- Publications & Papers
Highway engineers are struggling with a major effort to assess and evaluate our nation's bridges for scour. Advanced technology is urgently needed to make a meaningful impact on this effort. This paper describes a need to focus laboratory and field research studies on a better understanding of the bridge scour processes.
An Evaluation Of Highway Flood Damage Statistics, Jennifer Rhodes, Roy Trent
An Evaluation Of Highway Flood Damage Statistics, Jennifer Rhodes, Roy Trent
United States Department of Transportation -- Publications & Papers
Hydraulic events result in thousands of incidents of property damage each year. The U. S. Army Corps of Engineers estimates that annual damage averages over $2 billion (CaE, 1991). Federal, state, and local agencies have set up emergency assistance programs to help pay these unusually heavy expenses. Despite the detail of the policies regulating such programs, a comprehensive database describing the causes and consequences of flood losses does not exist. In an effort to obtain clear and consistent statistics on highway related damage, the disaster files of the Federal Highway Administration's (FHWA) Emergency Relief (ER) Fund and the Federal Emergency …
"Status Of Scour Instrumentation Development", Roy Trent, Ian Friedland
"Status Of Scour Instrumentation Development", Roy Trent, Ian Friedland
United States Department of Transportation -- Publications & Papers
Improved understanding of scour and sedimentation processes near and at highway bridges is dependant on collecting reliable field data. Field data collection programs, however, have been hindered by inadequacies in instrumentation and measurement technologies. Through a coordinated program of research, the Federal Highway Administration (FHWA), State Highway Agencies (SHAs), National Cooperative Highway Research Program (NCHRP), and other agencies are working on scour instrumentation. Investigations are underway to develop a wide range of equipment types for many purposes and needs, e.g., portable equipment to be used by field crews during floods for scour inspection or measurement of scour processes; fixed equipment …
Risk-Costs For Scour At Unknown Bridge Foundations, G. Kenneth Young, Stuart M. Stein, Roy Trent
Risk-Costs For Scour At Unknown Bridge Foundations, G. Kenneth Young, Stuart M. Stein, Roy Trent
United States Department of Transportation -- Publications & Papers
A risk method sets priorities for bridge foundation information gathering. Scour failure risk is the product of failure cost and the probability of failure. The method is based on data (much of which is subjective) in the National Bridge Inventory, NBI. Risk determines the ranking of bridges for foundation data gathering in support of scour evaluation; high risks could vanish if substantial foundations are discovered.