The Black Creek drainage area is about 202 square miles and the main stream runs for over 46 miles.  Principal named tributaries from upstream to downstream include Bigelow Creek, Spring Creek, North Branch Black Creek, Robin’s Brook, Black Creek Tributary, Hotel Creek, and Mill Creek.  Total relief is almost 700 feet, with headwater elevations of about 1200 feet and a low water elevation of 512 feet at Black Creek’s junction with the Genesee River.  The Black Creek Watershed is part of the 2,500 square mile Genesee River Basin that drains to Lake Ontario.          Black Creek Watershed and Subwatersheds - PDF Map (105 KB)          Black Creek Watershed and Subwatersheds - Land Use By Subwatershed (45 KB) Location of Black Creek Watershed and Sub-watersheds was determined by performing a flow accumulation on the digital elevation model for the Black Creek Watershed.  A flow accumulation uses the slope and aspect to determine potential water flow. The Digital Elevation Model was obtained from GIS Data Depot. The USGS Digital Elevation Model (DEM) data files are digital representations of cartographic information in a raster form. DEMs consist of a sampled array of elevations for a number of ground positions at regularly spaced intervals.