The U.S. Geological Survey has selected Woolpert to process and delineate elevation-derived hydrography for the state of Tennessee in support of the 3D Hydrography Program (3DHP).

Maps were produced by USGS at that scale as early as 1904, with revisions made until 2006. 3DHP uses updated, high-accuracy elevation data collected as part of the 3D Elevation Program .

The data will be used to support the state's flood-risk management and infrastructure planning efforts. 3DHP is the first systematic remapping of U.S. hydrography since the original USGS 1:24,000 ...