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Federal
USGS Hydrography (NHD) Overlay Map Service from The National Map - National Geospatial Data Asset (NGDA) National Hydrography Dataset (NHD) NGDA
U.S. Geological Survey, Department of the Interior —
The USGS National Hydrography Dataset (NHD) service from The National Map (TNM) is a comprehensive set of digital spatial data that encodes information about... -
State
Regional Drainage Basin Set
State of Connecticut —
See full Data Guide here. Regional Drainage Basin Set: Connecticut Regional Drainage Basins is 1:24,000-scale, polygon and line feature data that define Regional... -
State
Iowa Watershed Boundaries: Subbasins (HUC 08)
State of Iowa —
The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries... -
Federal
USGS Watershed Boundary Dataset (WBD) Stewardship Plan Objectives for FY20 from The National Map - National Geospatial Data Asset (NGDA) Watershed Boundary Dataset (WBD) NGDA
U.S. Geological Survey, Department of the Interior —
U.S. Geological Survey, Department of the Interior - The annual Watershed Boundary Dataset (WBD) stewardship plan is to maintain watershed boundary data through usage... -
Federal
Transforming Drainage Research Data (USDA-NIFA Award No. 2015-68007-23193)
Department of Agriculture —
This dataset contains research data compiled by the “Managing Water for Increased Resiliency of Drained Agricultural Landscapes” project a.k.a. Transforming Drainage.... -
State
Iowa Watershed Boundaries: Subwatersheds (HUC 12)
State of Iowa —
The Watershed Boundary Dataset (WBD) defines the areal extent of surface water drainage to a point, accounting for all land and surface areas. Watershed Boundaries... -
Federal
San Pedro River Aquifer Data Release - Transboundary Aquifer Assessment Program (TAAP)
Department of the Interior —
This is a release of data presented in the report "Binational Study of the Transboundary San Pedro Aquifer", Callegary and others, 2016: Callegary, J.B., Minjárez... -
State
12-digit HU (Subwatershed) NGDA
State of Oregon —
Abstract: This file contains Hydrologic Unit (HU) polygon boundaries for the United States, Puerto Rico, and the U.S. Virgin Islands. The data is a seamless National... -
City
UTILITIESCOMMUNICATION.ManholeREFDOC
City of Austin —
The Manhole REFDOC table should be used in conjunction with the Manhole feature class https://data.austintexas.gov/dataset/Manhole/38q2-v8xr with a join on the... -
State
Watershed Boundary Dataset (WBD)
State of California —
The Watershed Boundary Dataset (WBD) from The National Map (TNM) defines the perimeter of drainage areas formed by the terrain and other landscape characteristics.... -
County
Sanitary Districts
Lake County, Illinois —
Download In State Plane Projection Here. Sanitary Districts provide sewage collection and treatment within their service areas. Update Frequency: This dataset is... -
Federal
Flood Frequency Data Collection, Alaska and Conterminous Basins in Canada
Department of the Interior —
This data collection of U.S. Geological Survey data releases provides the source data and results of flood frequency analyses and annual exceedance probability... -
State
Soils Drainage Class
State of Connecticut —
Drainage class (natural)" refers to the frequency and duration of wet periods under conditions similar to those under which the soil formed. Alterations of the water... -
Federal
Ohio-drainage stream centerline coverage for use with Water Resources Investigations Report 03-4164
Department of the Interior —
This vector coverage of hydrography centerlines was derived from the National Hydrography Dataset (NHD), and encompasses all of Ohio and portions of Indiana,... -
State
6-digit HU (Basin) NGDA
State of Oregon —
Abstract: This file contains Hydrologic Unit (HU) polygon boundaries for the United States, Puerto Rico, and the U.S. Virgin Islands. The data is a seamless National... -
State
10-digit HU (Watershed) NGDA
State of Oregon —
Abstract: This file contains Hydrologic Unit (HU) polygon boundaries for the United States, Puerto Rico, and the U.S. Virgin Islands. The data is a seamless National... -
County
Drainage Districts Data Dictionary
Lake County, Illinois —
Data Dictionary for Drainage Districts. -
City
Drainage Maintenance Lot
City of Baton Rouge —
Polygon geometry with attributes displaying the Department of Maintenance Drainage Division maintenance lots in East Baton Rouge Parish, Louisiana. -
Federal
Flood Frequency Data and 2020 Observed Flood Probability for Selected Streamgages in the Fortymile River Basin, Alaska, 1911–2020
Department of the Interior —
This data release provides the source data and results of a flood frequency analysis and annual exceedance probability estimation for a flood that occurred on June...