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Mainstem Rivers of the Conterminous United States


Publication Date
Time Period


Blodgett, D.L., 2022, Mainstem Rivers of the Conterminous United States: U.S. Geological Survey data release,


Note: this data release has been superseded by version 2.0, available here: Mainstem rivers are the backbone of a connected network of hydrologic units that cover the landscape. A mainstem connects a headwater source area to an outlet. This data release identifies the same mainstem paths in hydrographic datasets for the conterminous US. The Mainstems dataset includes cross walks between mainstem identifiers and several hydrographic datasets. These cross walk tables do not include geometry. It also includes a summary of all mainstems with headwater and outlet identifiers from other datasets for those mainstems that could be matched. The summary table has highly simplified geometry and should be used [...]


Point of Contact :
David L Blodgett
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Integrated Modeling & Prediction Division
USGS Mission Area :
Water Resources

Attached Files

Click on title to download individual files attached to this item.

102020wbd_outlets.gpkg 11.87 MB application/unknown
102020wbd.csv 6.51 MB text/csv
mainstems_summary.gpkg 306.46 MB application/unknown
nhdplusv1.csv 446.37 MB text/csv
rf1.csv 796.04 KB text/csv
nhdplusv2wbd_outlets.gpkg 11.68 MB application/unknown
nhdplusv2wbd.csv 6.47 MB text/csv
“10/26/2020 WBD (includes original metadata)”
2.74 GB application/zip


Persistent, cross-scale, identification of hydrologic features, network navigation, and hydrologic indexing (hydrographic addressing). The cross walk tables in the dataset relate the RF1, NHDPlusV1, NHDPlusV2, Watershed Boundary Dataset snapshot from NHDPlusV2, and Watershed Boundary Dataset from June 2021.

Additional Information


Type Scheme Key
DOI doi:10.5066/P9BTKP3T

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