Phase 2 of this study presents initial preliminary culvert design for 16 stream crossings in the Squannacook Watershed, north-central Massachusetts. The GIS-based tool provides preliminary designs for box, arch, and pipe culverts to convey the 10- and 4-percent annual exceedance probability flood flows and to meet the Massachusetts Stream Crossing Standards. In addition to the preliminary culvert designs, the StreamStats report also includes: a link to the North Atlantic Aquatic Connectivity Collaborative (if stream crossing assessment data is available), information on the habitat quality and stream connectivity restoration potential of the stream crossing, and the ability to download the U.S. Army Corps of Engineers HEC-RAS hydraulic model files used in development of these designs. This tool is planned to be implemented at about 20,000 stream crossings across the State over the next several years and results added to StreamStats.
 

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More information on this study and the different phases can be found at the related science link below or by contacting Gardner Bent (gbent@usgs.gov) and Luke Sturtevant (lstrutevant@usgs.gov).