Please note that it may take several seconds for the map to load and refresh.
View Larger Map Download Shapefile
The shaded polygons in the map above represent the Chesapeake Bay Program watershed model land-river segments in Maryland. The delineation breaks the state up into 521 individual watersheds, which have an average size of 12,000 acres. The segments are at a scale smaller than Maryland’s 8-Digit watersheds; however, the segments were delineated so that they aggregated to Maryland’s 8-Digit watersheds, thus remaining consistent with the State’s watershed planning level scale. The segments are identified via a unique code (FIPSCATWAT), which is a combination of the county FIPS code (the land segment) and a watershed/river segment code. The land-river segment represents the finest scale at which Chesapeake Bay Phase 6 watershed model nutrient and sediment loads are available. The Chesapeake Bay TMDL and its associated allocations were developed at the Chesapeake Bay Segment scale, which divides Maryland into 58 watersheds. The land-river segments also aggregate to these Chesapeake Bay Segments.
Clicking on a shaded polygon will display information about that 8-digit watershed, including the watershed name and ID.
To navigate the map, use your arrow to drag and pan. Click the plus and minus buttons to zoom in and out. Enter an address in the window (top right) to zoom to a location. Clicking on "Basemap" allows the user to change the background (e.g. aerial photography, topographic coverage, etc). Clicking on “View Larger Map” will take the user to a customizable map interface where additional layers may be added.
Please direct questions or comments concerning Maryland's TMDL Program to firstname.lastname@example.org at (410) 537-3818.
1800 Washington Boulevard, Baltimore, MD 21230