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Hydraulics

The WSDOT headquarter hydraulics office provides technical support, training and policy in the field of hydrology, hydraulics, stormwater and river engineering to ensure our roadways provide a safe, effective and efficient movement of people and goods while maintaining the natural movement and treatment of water throughout our watersheds and water bodies.

Runoff Resources

Approved Drawings



WSDOT HQ Hydraulics Work Request Form

To request work to be completed by the HQ Hydraulics Office, please utilize the Work Request Form (xlsx, 27kb).  Select the type of work to be completed, the requested completion date, and other pertinent information.

Please send work requests to  Julie Heilman (509) 577-1703

WSDOT Hydraulics Manual

Every March, a new version of the Hydraulics Manual is published that reflects corrections and or clarifications found during general use of the manual.  To request a revision to the Hydraulics manual, please fill out the form below and submit it to Jay Christianson .

Revision Request Form

Before starting any hydraulic design, verify that the date in the footer of the Hydraulics Manual is for the last March. The latest version of the WSDOT Hydraulics Manual (M 23-03) is always available on-line through Engineering Publications On-Line Library .


WSDOT Hydraulics Report Outline

Below is a link to the current Hydraulic Report Outline referenced in the Hydraulics Manual as Appendix 1-3. The outline is periodically updated and as such it is recommended that designers use the latest version, at the link below, when staring a new Hydraulic Report. The outline is intended to be a starting point for designers. For additional guidance on the outline, designers should consult Chapter 1 of the Hydraulics Manual.

Hydraulic Report Outline


Hydraulics Report Checklist

Below is a link to the current Hydraulic Report Checklist referenced in the Hydraulics Manual as Appendix 1-4. The checklist is periodically updated and as such it is recommended that designers use the latest version, at the link below, when staring a new Hydraulic Report. The checklist is intended to assist designers in the development and through the review process of a Hydraulic Report. For additional guidance on the checklist, designers should consult Chapter 1 of the Hydraulics Manual.

Hydraulic Report Checklist


Fish Passage

WSDOT is required to install and maintain all culverts, fishways, and bridges to provide unrestricted fish passage as per Washington law, RCW 77.57.030. Design of fish barrier correction will be based on the latest version of the Washington Department of Fish and Wildlife's (WDFW) Fish Passage Design at Road Culverts manual or its successor. Through use of this design guidance and in coordination with WDFW, it is expected that new highway construction at stream crossings will not result in additional barriers to fish passage. For more information, see link below. 

http://www.wsdot.wa.gov/Environment/Biology/FP/fishpassage.htm


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