Environmental research & monitoring reports

Environmental research and monitoring reports completed by us fulfill permit requirements and document our ongoing efforts to improve the environmental performance of our statewide transportation system.

Find information on how to complete monitoring reports for specific disciplines from the Environmental disciplines webpage.

Use the following links to find reports by topic:

History, archaeology and culture provides videos, project webpages, information centers and publications that demonstrate the results of creative mitigation and notable historical resources describing the history of Washington’s Transportation system.

Fish & Wildlife features research on the effects of transportation infrastructure on wildlife movement:

  • Statewide habitat connectivity analysis
  • Ranking the suitability of existing bridges and culverts for providing wildlife passage
  • Landscape permeability for large carnivores
  • Wildlife crossings and collision analysis
  • Tracking wildlife carcasses removed by maintenance describes WSDOT's wildlife carcass removal database.

Noise monitoring & research includes reports on underwater noise and pile driving, as well as information about WSDOT's quieter pavement research.

Water resources & erosion control research & reports has reports available on:

  • Stormwater research
  • Municipal Stormwater Permit Reports
  • Construction Stormwater Permit Reports

Wetland monitoring reports document the development of individual wetland mitigation sites for federal, state and local permit compliance.

Project Environmental Mitigation Costs (PDF 3.5MB) reports the costs associated with environmental mitigation on WSDOT projects.

Stream restoration provides annual reports documenting:

  • Fish passage barrier corrections
  • Chronic Environmental Deficiency (CED) accomplishments

14 fish passage projects were completed in 2020

improving access to 54.2 miles of upstream habitat.

11,959 incidents responded to

by WSDOT’s incident Response teams during second quarter of 2021, 15% more than same quarter in 2020.

41 Pre-existing Funds Projects Advertised

during the eighth quarter of the 2019-2021 biennium.