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DOT LogoMemorandum
U.S. Department of Transportation
Federal Highway Administration

Subject: ACTION: Follow-up Web Conference for Plans of Action for Scour Critical Bridges
Date: September 10, 2007
From: /S/ Original signed by
M. Myint Lwin, P.E., S.E.
Director, Office of Bridge Technology
In Reply Refer To: HIBT-20
To: Associate Administrator for RD&T
Directors of Field Services
Federal Lands Highway Division Engineers
Resource Center Director
Division Administrators

Our May 22, 2007, memorandum, released an NHI webinar on CD-ROM to our field offices titled "Plans of Action for Scour Critical Bridges" and advised of its availability on the internet at This webinar, referenced as NHI 135085, provides guidance on developing and implementing a plan of action (POA) for bridges identified as scour critical. We hope that you and your staff have had the opportunity to review this training material. Also, we hope that this material has been helpful to you in your support of bridge owners who must take action towards scour critical bridges as required by the updated NBIS regulation, 23 CFR 650.313.e.

To provide further clarification on information provided in the training webinar and the experiences of other States, we will be hosting two Web conferences on "Scour Critical Bridge Plan of Action Question and Answer." The first Web conference will be held on October 2, from 10:30 A.M. to 12:00 P.M. Eastern time. The second Web conference will be held on October 23, from 2:00 P.M. to 3:30 P.M. Eastern time. These Web conferences will allow interaction with our FHWA staff knowledgeable in plans of action. Please invite the appropriate personnel within your corresponding Federal, State, and local agencies who are responsible for the planning, development, implementation and maintenance of POAs to participate on one of these Web conferences. In order to participate in one of these Web conferences, please contact Cynthia Nurmi at to receive the proper Web conference connection information.

To aid our staff in preparing to address your concerns and questions during the Web conferences, we are asking that you send us your input prior to the Web conference taking place. If you, your bridge staff and/or your corresponding Federal, State and local bridge owner has a question or concern on POAs that would like to be addressed in a Web conference, please e-mail them to the following address:

Any questions and concerns received through September 17 will be addressed during the October 2 Web conference. Questions and concerns received from September 18 to October 9 will be addressed during the October 23 Web conference. Other questions and concerns received after October 9 will be addressed on future Web conferences.

Since we plan to post the questions, concerns and answers discussed during each Web conference, we recommend that each individual submitting a question and/or concern participate on the Web conference that will be addressing his/her question and/or concern. Individuals submitting a question and/or concern will receive an e-mail notification about the Web conference date when his/her question and/or concern will be addressed once he/she submits it at the e-mail address provided in this memorandum. We anticipate posting all of the questions, concerns and answers shortly after each Web conference in our hydraulics Web site at Also, future schedules of Web conferences will be advertised at this Web site.

Thank you for your continued efforts toward developing and implementing POAs for scour critical bridges. Please let us know how we may assist you and your corresponding State manager representative in this important requirement of the updated NBIS regulation. If you have any questions please call Cynthia Nurmi at (404) 562-3908, or Jorge E. Pagán–Ortiz at (202) 366-4604.

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Updated: 04/07/2011

United States Department of Transportation - Federal Highway Administration