20 East Olive, Bozeman, MT
Presentation lineup (as of 02/13/2014)
Max Hjortsberg - Arctic Hydrology, Stream Crossings and Fish Passage
The Alaska Department of Natural Resources Office of Habitat Management and Permitting identified multiple road/stream crossings across the North Slope of Alaska that act as either a partial or full barrier to native aquatic species. ERM was contracted to provide hydraulic modeling, hydrologic analysis, fish passage assessment and GIS support.
For 30+ projects ERM conducted comprehensive fish passage assessments and designs, including hydraulic models using 3D Analyst and HEC-GeoRAS, to ensure safe passage both up and downstream for a variety of arctic fish species. Also, these projects needed to incorporate engineered structure replacements suitable to pass large oil and gas operation loads (3 million pound mobile drilling rigs) on top of potentially unstable permafrost soils. Thus far 12 road/stream crossing structures have been retrofitted or replaced, restoring fish passage in the area.
The presentation will provide background details, design and analysis methods and discuss the concept of GeoDesign, primarily how GIS was used as one of many design and analysis tools needed to create a comprehensive assessment and engineering product, and how a geographic component was critical in understanding the needs of the project as a whole.