Location

UMass Amherst

Start Date

27-6-2011 4:25 PM

End Date

27-6-2011 4:45 PM

Description

The Federal Highway Administration recently published Hydraulic Engineering Circular (HEC) 26 “Culvert Design for Aquatic Organism Passage.” This new stream simulation design procedure yields hydraulic and sediment mobility conditions within an embedded culvert that are similar to those found upstream and downstream of the crossing over a wide range of flow rates. By simulating the depth, velocity, and sediment transport capabilities of the channel over the site-specific range of passage discharges, it is reasonable to infer that aquatic organisms, such as fish, that are capable of passing up and down the channel ·will also be able to pass through the culvert. Species-specific information on swimming capabilities or behaviors is not required. The presentation will provide background and an overview of the 13 -step design procedure, which is the core of the HEC 26 design manual. Detailed technical information supporting the methods used ·within the design procedure and several design examples are included in the appendices of the manual. The best practices described in the manual will be evaluated and updated, as necessary, as research and application experience advances.

The presentation will review the basics of the design procedure by illustrating its application on one case study. Comparison of case study results using the HEC 26 procedure with those generated by other design methodologies will be discussed.

Comments

Bart Bergendahl is a Senior Hydraulic Engineer with more than 30 years of experience in the fields of hydrology, hydraulics, sediment-transport and scouranalysis, river mechanics and stream stability, fluvial geomorphology, and urban drainage systemanalysis/design in both the public and private sectors. He began his hydraulic engineering career with the FederalHighway Administration in 1977 in what was then called the Eastern Direct Federal Division Office in Arlington,

VA. He holds a Master’s of Science degree in Civil Engineering from Colorado State University. His postgraduateand professional work has focused on hydraulics, sediment transport, river mechanics, andscour. In 1994, Bart left Federal service to join theprivate water resources firm of Simons, Li & Associates,Inc. in Phoenix, Arizona, where he remained until returning to FHW A in 2002. He is a registeredProfessional Engineer in Arizona and Illinois, andcurrently serves as the Hydraulics Discipline Leader for the Federal Lands Highway Division of FHWA in Lakewood, CO.

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Jun 27th, 4:25 PM Jun 27th, 4:45 PM

Session A3- culvert Design for aquatic organism passage

UMass Amherst

The Federal Highway Administration recently published Hydraulic Engineering Circular (HEC) 26 “Culvert Design for Aquatic Organism Passage.” This new stream simulation design procedure yields hydraulic and sediment mobility conditions within an embedded culvert that are similar to those found upstream and downstream of the crossing over a wide range of flow rates. By simulating the depth, velocity, and sediment transport capabilities of the channel over the site-specific range of passage discharges, it is reasonable to infer that aquatic organisms, such as fish, that are capable of passing up and down the channel ·will also be able to pass through the culvert. Species-specific information on swimming capabilities or behaviors is not required. The presentation will provide background and an overview of the 13 -step design procedure, which is the core of the HEC 26 design manual. Detailed technical information supporting the methods used ·within the design procedure and several design examples are included in the appendices of the manual. The best practices described in the manual will be evaluated and updated, as necessary, as research and application experience advances.

The presentation will review the basics of the design procedure by illustrating its application on one case study. Comparison of case study results using the HEC 26 procedure with those generated by other design methodologies will be discussed.