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The 3D Hydrography Program (3DHP) data is an integrated, National, 3D-enabled hydrologic dataset derived from the USGS 3D Elevation Program (3DEP) data. For areas where Elevation-derived...
Search relevance: 1.00 | Views last month: 8 | Catalog Last Checked: September 10, 2026 at 09:07 PM -
This map data layer represents the linear hydrology features for the City of Bloomington, Indiana. This includes creeks, streams, lake shorelines, open channels, and detention pond boundary line features.
Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: September 10, 2026 at 05:59 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. This dataset provides the Tier II catchments delineated for the most downstream Tier II segment. This...
Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: September 10, 2026 at 06:49 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. Polygon boundaries of lakes (generalized shape) in Maryland. Last Updated: Feature Service Layer Link:...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:48 PM -
Connecticut 303(d) Impaired Waters 2024 is a subset of Connecticut 305(b) Assessed Waters 2024. If any one of the assigned designated uses is categorized as NOT Supporting, the assessed waterbody...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:41 PM -
Connecticut 303(d) Impaired Waters 2024 is a subset of Connecticut 305(b) Assessed Waters 2024. If any one of the assigned designated uses is categorized as NOT Supporting, the assessed waterbody...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:40 PM -
There are multiple systems for mapping waterbodies within the conterminous United States. Prominent among them are the "High Resolution" and "Version 2" editions of the National Hydrography...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 10:08 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The digital segmented network based on watershed boundaries - ERF1-2 - includes enhancements to the...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:50 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. Line features of rivers and streams (detailed shape) in Maryland. Last Updated: Feature Service Layer...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:49 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The intent of this dataset is for it to be used to produce maps and provide a spatial reference for all...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 06:49 PM -
This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. Although the State of Maryland has no natural lakes - it has an abundance of created lakes and ponds...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 06:51 PM -
The Stream Condition Index (SCI) is a grade card scoring District waterbodies. Learn about your local streams using the 'Stream Explorer' or dive deeper into the data DOEE collects to study these...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 07:03 PM -
Connecticut 303(d) Impaired Waters 2024 is a subset of Connecticut 305(b) Assessed Waters 2024. If any one of the assigned designated uses is categorized as NOT Supporting, the assessed waterbody...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:41 PM -
305b Assessed River, Lake, Estuary 2024: Connecticut 305b Assessed River 2024 is a 1:24,000-scale, line feature-based layer that includes rivers that have been assessed to comply with Sections...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:39 PM -
Connecticut 303(d) Impaired Waters 2024 is a subset of Connecticut 305(b) Assessed Waters 2024. If any one of the assigned designated uses is categorized as NOT Supporting, the assessed waterbody...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:40 PM -
Although the State of Maryland has no natural lakes, it has an abundance of created lakes and ponds that are used for wildlife habitat, recreation, water supply, and other reasons. This digital...
Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:50 PM
