Chapter
Feb 8, 2016
Why Worry about Existing Bridges Recently Designated as Scour Critical?
Publication: Geotechnical and Structural Engineering Congress 2016
Abstract
This paper will describe the approach that many state DOTs have taken to develop proactive statewide scour programs to assess, prioritize and protect all types of over-water bridges. FHWA compliance requires that a plan of action be implemented if a bridge is coded/rated scour critical. When this occurs, bridge owners are often required to implement a short term flood monitoring program until protective more permanent scour stabilization alternatives can be designed and installed. Scour awareness has increased over the past 25 years and FHWA design standards for new bridges have been updated and revised; however, predicting future scour at existing bridges remains challenging and requires engineering judgment. Bridges owners do remain skeptical of the need to install effective countermeasures when their 75 year old bridge shows no observed signs of scour and the bridge has withstood multiple flood events. Scour is the number 1 cause of bridge failures in the United States and experience is needed to recognize a truly vulnerable bridge and protect it from damage.
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© 2016 American Society of Civil Engineers.
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Published online: Feb 8, 2016
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P.E.
B.S. and M.S. in Civil Engineering, Clarkson Univ., Associate Vice President, CHA Consulting, Inc., III Winners Circle, Albany, New York 12205. E-mail: [email protected]
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.