20250813 11351000 1.0 TRUE This map shows the habitat, both current and historic, that blueback herring may access in the Connecticut River and its primary tributaries, in direct relation to obstacles such as, primarily, hydropower dams or, to a lesser degree, drainage culverts. Our intention is to provide an opportunity for interested stakeholders to recognize what the USFWS, with input from state government and academic partners, recognize as immediate top priorities for the mitigation of obstacles that inhibit fish migration. With that information, they can direct their energy and financial resources toward that mitigation. Rivers herein are visualized in terms of the portion of historic habitat that is available to fish: unobstructed (no dams or other obstacles inhibit movement), partially obstructed (dams or obstacles with some mechanism of fish passage where movement is limited), or fully obstructed (dams or obstacles without fish passage, such that fish are prohibited from utilizing their full historic range). Further, obstacles are visualized in terms of what mitigation action is recommended by state government partners: removal of the obstacle, improvement or installation of fish passage, removal or improval/installation, low priority (no action is expected in the near term, i.e. status quo), or end of the road (no action is expected in the long term, e.g. Army Corp of Engineer flood prevention dams). Blueback herring Connecticut River dams diadromous fish fish migration hydropower watershed This map shows the habitat, both current and historic, that blueback herring may access in the Connecticut River and its primary tributaries, as well as the major obstacles inhibiting their migration. This work was accomplished by Corey Eddy at the Connecticut River Fish and Wildlife Conservation Office, on behalf of the River Migratory Fish Restoration Cooperative, with support from state government partners: CT Dept of Energy and Environmental Protection, MA Division of Marine Fisheries, MA Dept of Fish and game, NH Fish and Game Dept, VT Dept of Fish and Wildlife, and colleagues at the University of Massachusetts Amherst. The United States Fish and Wildlife Service (Service) shall not be held liable for improper or incorrect use of the data described and/or contained herein. While the Service makes every reasonable effort to ensure the accuracy and completeness of data provided for distribution, it may not have the necessary accuracy or completeness required for every possible intended use. The Service recommends that data users consult the associated metadata record to understand the quality and possible limitations of the data. The Service creates metadata records in accordance with the standards endorsed by the Federal Geographic Data Committee. As a result of the above considerations, the Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of the data. It is the responsibility of the data user to use the data in a manner consistent with the limitations of geospatial data in general and these data in particular. Although these data have been processed successfully on a computer system at the Service, no warranty, expressed or implied, is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. 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