Under a full service contract with Western Federal Lands Highway Division (WFLHD), DJ&A provides civil engineering, environmental engineering and environmental compliance support for transportation projects across the states of Montana, Idaho, Wyoming, Oregon, and Washington.

Under this contract, DJ&A supported WFLHD in completing a variety of environmental tasks to support the NEPA documentation required to complete culvert replacement and a roadway widening project near Hell Creek State Park in eastern Montana.

DJ&A’s environmental team located all wetlands in the area that could be impacted by the proposed project. A report was compiled that detailed all potential mitigation measures and recommended design modifications to avoid or lessen the impacts on wetland areas.  Wetland boundaries were mapped and used to support compliance with Section 404 permitting for the project.

Key Services

  • Provided project management including coordination with Montana Fish, Wildlife & Parks (FWP), U.S. Fish Wildlife Service (USFWS), U.S. Army Corps of Engineers, and FHWA staff
  • Developed Wetlands and Other Waters of the US Delineation Report
  • Completed field surveys and delineated wetlands in accordance with federal guidelines (U.S. Army Corps of Engineers Wetlands Delineation Manual (Environmental Research Laboratory 1987))
  • Produced environmental documents compliant with NEPA, Section 404 of the Clean Water Act, and a MT DEQ 318 permit application
  • Completed GIS mapping of wetland boundaries
  • Produced cartographic exhibits of field findings
  • Submitted mapping and design according to FHWA standards
  • Completed wetland functions and values assessments
  • Finished project within a short period of performance
  • Completed QA/QC process and documentation

Value Added

With offices in both Missoula, MT and Vancouver, WA, DJ&A can geographically serve a wide variety of clients throughout the West.  In terms of this project, DJ&A was able to meet the needs of WFLHD at the far eastern edge of their region by mobilizing a team of scientists to complete the field work in just two days.  This team had the local scientific knowledge to complete the work efficiently, without extended travels times, which provided a cost effective and environmentally compliant project for WFLHD.