Policy and Memos
Regulation
Policy
- Additional Guidance for Assessment of Bridges Over Waterways with Unknown Foundations 10/29/2009
- Agreement for the Implementation of Scour Countermeasures to Protect Foundations of Scour Critical Bridges 02/11/1997
- Backwater Criterion for Hydraulic Design of Structures 04/21/1992
- Dam as a Foundation for a Highway 12/09/1991
- Design Standards for Highways in National Flood Insurance Program Mapped Floodplains 04/02/1986
- DOT Order 5650.2 - Floodplain Management and Protection 04/23/1979
- Highway Embankments versus Levees and other Flood Control Structures 09/10/2008
- Highways Affected by Water Resources Development Projects 12/09/1991
- Procedures for Coordinating Highway Encroachments on Floodplains with the Federal Emergency Management Agency (FEMA) 06/25/1982
- Revision of Coding Guide, Item 113 - Scour Critical Bridges 04/27/2001
- Significant Encroachments 04/02/1985
- Transportation System Preparedness and Resilience to Climate Change and Extreme Weather Events (FHWA Order 5520) 12/15/2014
Guidance
- Compliance with the National Bridge Inspection Standards - Background/Plan of Action for Scour Critical Bridges/Scour Focus States/Item 113 Coding Issues/Unknown Foundations/Tidal Bridges 03/23/2006
- Compliance with the National Bridge Inspection Standards - Plan of Action for Scour Critical Bridges 03/29/2005
- Eligibility of Activities To Adapt To Climate Change and Extreme Weather Events Under the Federal-Aid and Federal Lands Highway Program 09/24/2012
- Evaluating Scour at Bridges (T 5140.23) 10/28/1991
- Frequently Asked Questions - Bridges Over Waterways with Unknown Foundations 06/03/2009
- Geotechnical Guideline No. 16 - Determination of Unknown Subsurface Bridge Foundations 08/27/1998
- Guidance for Implementing the One-Foot Standard for Encroachments on NFIP Floodplains 12/22/1986
- Guidance for Preparing and Processing Environmental and Section 4(f) Documents (T6640.8A) 10/30/1987
- Guidance on Applying Risk Based, Data Driven Decision-Making Process to the FHWA Scour Program 04/09/2012
- HEC 18 - Evaluating Scour at Bridges (5th edition) 04/01/2012
- Storm Drainage, Cast-In-Place Non-Reinforced Concrete Pipe, Flood Plain Encroachments and Highways In National Flood Insurance Program Mapped Floodplains, Coordinating Highway Encroachments on Floodplains With FEMA 23 CFR 650 A - NS Sec. 650.115 09/30/1992
Information
- A Primer on Modeling in the Coastal Environment 12/29/2017
- CMIP Climate Data Processing Tool 2.1 User's Guide 03/01/2021
- Culvert Selection 10/01/2012
- Design for Fish Passage at Roadway-Stream Crossings: Synthesis Report 06/01/2007
- HDS 2 - Highway Hydrology (2nd edition) 10/01/2002
- HDS 4 - Introduction to Highway Hydraulics 06/01/2008
- HDS 5 - Hydraulic Design of Highway Culverts (3rd edition) 04/01/2012
- HDS 6 - River Engineering for Highway Encroachments 12/01/2001
- HDS 7 - Hydraulic Design Safe Bridges 04/01/2012
- HEC 09 - Debris Control Structures Evaluation and Countermeasures (3rd edition) 10/01/2005
- HEC 14 - Hydraulic Design of Energy Dissipators for Culverts and Channels (3rd edition) 07/01/2006
- HEC 15 - Design of Roadside Channels with Flexible Linings (3rd edition) 09/01/2005
- HEC 17 - Highways in the River Environment - Floodplains, Extreme Events, Risk, and Resilience, 2nd Edition 06/01/2016
- HEC 20 - Stream Stability at Highway Structures (4th edition) 04/01/2012
- HEC 21 - Design of Bridge Deck Drainage 05/01/1993
- HEC 22 - Urban Drainage Design Manual (3rd edition) 09/01/2009
- HEC 23 - Bridge Scour and Stream Instability Countermeasures: Experience, Selection, and Design Guidance (3rd edition, Volume 1) 09/01/2009
- HEC 23 - Bridge Scour and Stream Instability Countermeasures: Experience, Selection, and Design Guidance (3rd edition, Volume 2) 09/01/2009
- HEC 24 - Highway Stormwater Pump Station Design 02/01/2001
- HEC 25 - Highways in the Coastal Environment - 3rd edition 01/01/2020
- HEC 26 - Culvert Design for Aquatic Organism Passage 10/01/2010
- Hydraulic Considerations for Shallow Abutment Foundations 12/21/2018
- MOA between The U.S. Coast Guard and FHWA To Coordinate and Improve Bridge Planning and Permitting 01/14/2014
- MOU between The U.S. Coast Guard and FHWA, FTA, and FRA To Coordinate and Improve Bridge Planning and Permitting 01/14/2014
- Tech Brief: Overview on Practices on 2D Models 07/15/2019
- Two-Dimensional Hydraulic Modeling for Highways in the River Environment 10/01/2019