Service Description: This dataset represents dam and road stream crossings in the northeastern United States (ME, NH, VT, MA, CT, RI, NY, PA, NJ, DE, MD, VA, WV, DC). Road-stream crossing data was compiled by the North Atlantic Aquatic Connectivity Collaborative (https://streamcontinuity.org/). Dam data was compiled for the original Northeast Aquatic Connectivity study (http://rcngrants.org/content/northeast-aquatic-connectivity) and revised based on input from the Northeast Aquatic Connectivity project workgroup, updates from state dam databases, and removals from American River's dam removal database (https://www.americanrivers.org/threats-solutions/restoring-damaged-rivers/dam-removal-map). Both road-stream crossings and dams were spatially linked to flowlines in the USGS National Hydrography Plus (NHD-Plus) v2 1:100,000 stream dataset. These barriers form the primary input dataset for the 2016 version of the Northeast Aquatic Connectivity analysis. (http://maps.freshwaternetwork.org/northeast). To this barrier dataset, 38 ecologically-relevant metrics were calculated and used in the barrier prioritization.
Service ItemId: 3b49327c06104b6e87400b682e6f418c
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: False
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Spatial Reference: 4269 (4269)
Initial Extent:
XMin: -81.0078405315238
YMin: 35.8134026686633
XMax: -68.7010094684762
YMax: 48.2010933313367
Spatial Reference: 4269 (4269)
Full Extent:
XMin: -82.7338200002927
YMin: 36.6565759998825
XMax: -66.9750299996347
YMax: 47.3579200000081
Spatial Reference: 4269 (4269)
Units: esriDecimalDegrees
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