Environmental corridors are areas in the landscape containing especially high value natural, scenic, historic, scientific, and recreational features. Environmental corridors and isolated natural resource areas consist of the following 12 natural resource and natural resource-related elements: 1) lakes, rivers, and streams and their associated shorelands and floodplains; 2) wetlands; 3) woodlands; 4) prairies; 5) wildlife habitat areas; 6) wet, poorly drained, or organic soils; 7) rugged terrain and high-relief topography; 8) existing park and open space sites; 9) potential park and open space sites; 10) historic sites; 11) significant scenic areas and vistas; and 12) natural and scientific areas. Primary environmental corridors include a wide variety of these resource and resource-related elements and are at least 400 acres in size, two miles in length, and 200 feet in width. Secondary environmental corridors generally connect with primary environmental corridors, and are at least 100 acres in size and one mile in length. Isolated natural resource areas contain some of these resource and resource-related elements, are separated physically from environmental corridors by intensive urban or agricultural land uses, and are at least five acres in size.
The environmental corridor and isolated natural resource area polygons are identified by a tag or label consisting of one of the following codes:
PEC: Primary environmental corridor; SEC: Secondary environmental corridor; INRA: Isolated natural resource area; OUT: Area outside of environmental corridors; 950: Surface water from SEWRPC land use inventory; PEC.950: Surface water inside PEC; SEC.950: Surface water inside SEC; INRA.950: Surface water inside INRA.
The digital map files are available in ESRI geodatabase and shapefile format. The files consist of graphic map features only and do not contain additional attributes at this time.