20220428 14142500 1.0 TRUE East of Hudson Watershed Boundary Official NYC East-of-Hudson and West-of-Hudson outer watershed boundaries delineated from 2009 LiDAR-derived 1-meter Digital Elevation Model (DEM). This representation of the NYC watershed replaces earlier versions that were based on lower-resolution information and is to be used for any NYCDEP BWS regulatory or programmatic mapping. These data are not a substitute for on-site inspection or survey, however, in cases where a location that is close to the border of this GIS representation is questioned. FALL 2020 NOTE: In Fall 2020, two changes were made to the official NYC watershed and basin boundaries as follows: 1) The Diverting Reservoir boundary in EOH was updated, which in-turn required a change in the basin and subbasin boundary there. 2) Based on the results of a watershed boundary field inspection by REP and GIS Staff, as per the watershed delineation SOP, a very small portion of the outer Cannonsville Basin boundary in WOH, T. Delhi required updating, which in-turn required a change in the basin and subbasin boundary there. This resulted in a loss of .5 acres in the WOH watershed and the Cannonsville Basin. These changes have been reflected in this basin-derived dataset. NOTE: This layer has been clipped to the Westchester County boundary (2022) Original data (NYC outer-watershed boundary and 8-digit HUC basins) developed under NYCDEP contract CAT-393 by RACNE. QA edits developed in-house by NYCDEP BWS GIS. This data packaging is owned by the New York City Department of Environmental Protection, Bureau of Water Supply, 2013.