Duck Creek Associates Natural Resource Consultants

Road Sediment Erosion Modeling

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Stream Crossing and Fish Passage

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Mapping and GIS Analysis

Road and Stream Crossing Analysis


Since 2004, Duck Creek has directly surveyed over 5800 miles of roads and stream crossings for erosion and fish passage in Oregon, Washington, and Idaho. We utilize a variety of methodologies to determine the condition of roads and the ability of a fish to pass through a stream crossings. Our methods include:

  • Oregon Department of Forestry Rapid Road Risk Assessment
  • Washington Department of Natural Resources Sediment Erosion Model
  • USFS National Inventory and Assesment Protocol
  • Colville Confederated Tribes Road Assessment
  • USFS Stream Channel Reference Sites Methodology

    • We build on the road and stream crossing assesments by using specialized software for further fish passage, geomorphic and culvert analysis such as:

  • Fish Xings
  • Stream Hydraulic Analysis, XSPRO


    • Geographic Information Systems


    Duck Creek's GIS shop is powered by ESRI products including:

  • ArcGIS-ArcINFO
  • ArcGIS-Spatial Analyst
  • ArcGIS-3-D Analyst
  • ArcGIS-Network Analyst
  • ArcGIS-HydroTools
  • ArcGIS-PurVIEW

    • We are highly skilled at geoprocessing which includes advanced model building to automate workflows with increased effiency. We utilize advanced tools to conduct 3-dimensional feature data collection from digital stereo-photography. We also conduct multi-phased water resource analysis with Ar Hydro on issues such as calculating stream flow on ungauged streams.

    Aquatic and Terrestrial Ecology


    Duck Creek offers a wide array of ecological related services to our clients. Our services include:

  • Aquatic habitat surveys
  • Riparian and river surveys
  • Rangeland inventories
  • Rare and endangered species inventories
  • Environmental and biological assessments
  • Watershed analyses


    • Forestry


    We offer a comprehensive range of forestry services to help landowners make decisions which fulfill their objectives. Servces include:

  • designing, installing, and maintaining timber inventories
  • harvest operation planning and layout
  • administering the implementing traditional and alternative silvicultural prescriptions
  • hazardous fuel reduction