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Federal
Colorado River Mile System, Grand Canyon, Arizona
Department of the Interior —
These data represent the centerline and measured increments at hundredths, tenths and whole miles, along the centerline of the Colorado River beginning at Glen Canyon... -
Federal
Geospatial output data from the RVR Meander model of the Wabash River near the Interstate 64 Bridge near Grayville, Illinois
Department of the Interior —
Natural river channels continually evolve and change shape over time. As a result, channel evolution or migration can cause problems for bridge structures that are... -
Federal
Archive LECL Lewis and Clark Trail Historic Route
Department of the Interior —
The original NPS centerline of the historic route of the Lewis and Clark National Historic Trail, prior to the Trail's extension by Congress (P.L. 90-543, as amended...