Installation of a culvert to carry a small stream under a roadway is a very common practice. However, culverts quite often function as a barrier to fish, isolating them from important habitat areas. Proper design of culverts considers length, slope and flow velocity of the culvert and fish species and size. This 3-hour online course is the second of a two-part series on culvert design for fish passage. This course covers channel profile impacts, modifying structures, tide and flood gates, fishways, baffles andthe design of roughened channels.
Extensive research on design has been conducted in the state of Washington and serves as the basis for this course. The primary species of concern in Washington are salmon and trout. While the guidance was written specific to Washington, the vast majority of the guidance is applicable to any location where fish passage through culverts is required and much of the guidance applies to all species of fish, not just salmon and trout. Much of the early work in fish passage through culverts focused on swimming speeds of fish species vs. velocities in the culvert. This recent work addresses that issue but goes significantly beyond swimming speeds to identify other design approaches that work better and provide passage for fish other than the target species and size.
At the conclusion of the course, you will have a better understanding of:
How the channel profile impacts fish passage, including the impacts of headcuts and regrading the channel
The different types of structures that can be used to modify the channel profile, including log sills, plank controls and boulder controls
The different types of tide gates and flood gates, how they impact fish passage and how the designs can be modified to improve the potential for fish passage
The basic types of fishways
The hydraulics of baffles
How to design roughened channels, including bed stability and fish passage velocity
SUBJECT MATTER EXPERT: Mark Peterson, P.E., M.ASCE
Mr. Peterson has a BS and MS from Montana State University and more than 28 years of engineering experience in hydrology and hydraulics. He is currently a senior engineer with Kadrmas, Lee and Jackson and has worked extensively in both the private sector and in state government. He is licensed as a PE in MN, MT, ND, SD and WY. He was chairman of a three-person committee that re-wrote the Hydraulics Manual for the Montana Department of Transportation and authored the storm water regulations for subdivisions in Montana. He also teaches a two-day course on Introduction to Detention Pond Design for the American Society of Civil Engineers throughout the U.S.
3 hrs. Online Course