The IDEA protocol provides a mechanism for reviewing proprietary retaining wall systems and issuing technical evaluation reports. Many state and local transportation agencies, as well as large private owners, will find the IDEA protocol to be sufficient for evaluation of wall systems. However, some state DOTs will have supplemental requirements to address their specific wall system requirements.
Within this section, users will find listings of individual DOTs’ requirements for use of proprietary retaining wall systems. These listings are meant to help guide wall system suppliers, contractors, and engineers in their work with individual states.
The requirements vary amongst the DOTs. For DOTs that maintain a qualified product list for proprietary retaining walls, the variations generally fall into one of four categories in regards to their use of IDEA reports for system evaluation. These general categories are:
Some other DOTs do not maintain an approved list of wall vendors and, therefore, do not have general submittal requirements or a pre-approval process. These agencies require wall vendors meet all of the design, specification and/or special provision requirements on a project-specific basis.
Title | Date | |
---|---|---|
Alabama DOT Supplemental Requirements | December 2020 | Download |
Alaska DOT Supplemental Requirements | July 2021 | Download |
Arizona DOT Supplemental Requirements | June 2021 | Download |
Arkansas DOT Supplemental Requirements | June 2021 | Download |
California DOT Supplemental Requirements | August 2021 | Download |
Colorado DOT Supplemental Requirements | June 2021 | Download |
Connecticut DOT Supplemental Requirements | August 2021 | Download |
Delaware DOT Supplemental Requirements | June 2021 | Download |
District of Columbia DOT Supplemental Requirements | May 2021 | Download |
Florida DOT Supplemental Requirements | June 2021 | Download |
Georgia DOT Supplemental Requirements | June 2021 | Download |
Hawaii DOT Supplemental Requirements | June 2021 | Download |
Idaho DOT Supplemental Requirements | August 2021 | Download |
Illinois DOT Supplemental Requirements | June 2021 | Download |
Indiana DOT Supplemental Requirements | December 2020 | Download |
Iowa DOT Supplemental Requirements | July 2021 | Download |
Kansas DOT Supplemental Requirements | June 2021 | Download |
Kentucky DOT Supplemental Requirements | June 2021 | Download |
Louisiana DOT Supplemental Requirements | June 2021 | Download |
Maine DOT Supplemental Requirements | December 2020 | Download |
Maryland DOT Supplemental Requirements | December 2020 | Download |
Massachusetts DOT Supplemental Requirements | June 2021 | Download |
Michigan DOT Supplemental Requirements | December 2020 | Download |
Minnesota DOT Supplemental Requirements | July 2018 | Download |
Mississippi DOT Supplemental Requirements | June 2021 | Download |
Missouri DOT Supplemental Requirements | June 2021 | Download |
Montana DOT Supplemental Requirements | April 2021 | Download |
Nebraska DOT Supplemental Requirements | June 2021 | Download |
Nevada DOT Supplemental Requirements | December 2020 | Download |
New Hampshire DOT Supplemental Requirements | June 2021 | Download |
New Jersey DOT Supplemental Requirements | August 2021 | Download |
New Mexico DOT Supplemental Requirements | December 2020 | Download |
New York DOT Supplemental Requirements | June 2021 | Download |
North Carolina DOT Supplemental Requirements | December 2020 | Download |
North Dakota DOT Supplemental Requirements | August 2021 | Download |
Ohio DOT Supplemental Requirements | December 2020 | Download |
Oklahoma DOT Supplemental Requirements | August 2021 | Download |
Oregon DOT Supplemental Requirements | December 2020 | Download |
Pennsylvania DOT Supplemental Requirements | June 2021 | Download |
Puerto Rico DOT Supplemental Requirements | June 2021 | Download |
Rhode Island DOT Supplemental Requirements | July 2021 | Download |
South Carolina | May 2021 | Download |
South Dakota DOT Supplemental Requirements | December 2020 | Download |
Tennessee DOT Supplemental Requirements | December 2020 | Download |
Texas DOT Supplemental Requirements | December 2020 | Download |
Utah DOT Supplemental Requirements | June 2021 | Download |
Vermont DOT Supplemental Requirements | December 2020 | Download |
Virginia DOT Supplemental Requirements | June 2021 | Download |
Washington DOT Supplemental Requirements | December 2020 | Download |
West Virginia DOT Supplemental Requirements | August 2021 | Download |
Wisconsin DOT Supplemental Requirements | June 2021 | Download |
Wyoming DOT Supplemental Requirements | June 2021 | Download |