Wyoming Headwaters Project: Refined Watershed Boundaries at 1:24,000 Scale

The Wyoming Headwaters Project refines mid-1970s USGS Hydrologic Unit Boundaries for the state. It defines 5th and 6th level watersheds at a 1:24,000-scale, with 5th level units between 40,000 and 250,000 acres and 6th level units between 10,000 and 40,000 acres. The project was conducted using ArcView and Arc/Info GIS, with final data to be hosted by the Wyoming Natural Resources Data Clearinghouse.

Use Cases

• Modeling water flow and runoff based on refined watershed boundaries.
• Integrating state-level hydrologic data with national datasets based on updated USGS HUBs.
• Planning conservation or land-use projects based on subwatersheds between 10,000 and我们发现 40,000 acres.
• Conducting cross-state hydrologic analysis based on boundaries coordinated with neighboring states.

Strengths

• Boundaries are defined at a detailed 1:24,000-scale.
• Watershed sizes are explicitly defined: 5th level between 40,000 and 250,000 acres, 6th level between 10,000 and 40,000 acres.
• Delineation follows the USGS Interagency Guideline, suggesting methodological consistency.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Last update date is unknown; freshness unverified.

Provenance

Source

NASA Earthdata (platform), with data from the Wyoming Headwaters Project and summary by WYGISC.

Collection Method

Delineation conducted using ArcView GIS and Arc/Info GIS, with review by HUB workgroups and a technical committee.

Time Range

Project refines boundaries originally published in the mid-1970s.

Freshness

Last updated is unknown.

Geography

State of Wyoming, with coordination across state boundaries.