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Benton County Riparian and Wetlands Project –
Maps

Inventory Maps for Riparian and Wetland Resources

Maps produced by county staff and other organizations to date to support the Riparian and Wetlands Project:

Benton County Watersheds Overview Map – Benton County "watersheds" are region of land within which water flows down into a specified body, such as a river, lake, sea, or ocean. Many active watershed councils (see Resources) work with willing landowners in these areas.

Upper Alsea sub-basin and Upper Willamette sub-basin – There are two major sub-basins within Benton County; inventory work was prepared for each basin based on characteristics for each basin.

Benton County Fish Bearing Streams and Water Quality Limited Streams – Numerous streams throughout Benton County are considered "fish bearing" and "water quality limited" as defined by the State of Oregon.

Buildings located within 50 feet of current mapped stream locations (from current Benton County mapped stream locations and building locations) and within 25 feet of current mapped stream locations

Benton County Lakes and Ponds and other water polygons based on US Geological Survey mapping information

Riparian and Wetlands LiDAR Maps

LiDAR or "Light Detection and Ranging" is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target. The prevalent method to determine distance to an object or surface is to use laser pulses. Benton County is a partner in the Oregon LiDAR Consortium and will be utilizing LiDAR data for the Riparian and Wetlands project and other County projects.

Map Example – City of Adair Village riparian corridor imagery compared to current fish buffer, stream map

Lower Newton Creek map; demonstrates how new map data better defines stream channel

KEY:

1. "Steep Slopes" showing top of stream bank with high resolution LiDAR

2. "Current Fish Buffer" showing Oregon Dept. of Fish and Wildlife current recommended buffer to protect fish and aquatic wildlife. NOTE difference with new LiDAR and current state maps

3. "National Wetland Index (NWI)" – Department of State Lands mapping of wetlands

* As you can see the actual location of the stream/riparian area is not always captured in old maps. The new map inventory in priority areas across Benton County will greatly improve Riparian and Wetland planning and protection/incentive areas.

More Maps to Come as Project Work Continues! Check Back Soon...

Is there a map you'd like to see that's not here? Contact Adam Stebbins via e-mail or call 541-766-6085.

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