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Draft Supplemental Environmental Impact Statement

Draft Supplemental Environmental Impact Statement cover image
The contractor constructing the portion of the I-90 project from the snowshed to Keechelus Lake Dam proposed a design modification to replace the snowshed with avalanche bridges instead of an expanded snowshed.

FHWA and WSDOT prepared a Draft Supplemental Environmental Impact Statement (EIS) to compare and contrast the benefits and impacts of the avalanche bridges instead of the expanded snowshed.

These files are in PDF format and you must have a free copy of Adobe® Reader® installed on your computer to view these files.

You may also request a Summary and CD from the I-90 project office.

You can also view printed copies of the Draft Supplemental EIS at the South Central Region Office in Union Gap, the Federal Highway Administration Olympia office, or at the following libraries:

• WA State Library
• Cle Elum Library
• Ellensburg Library
• Central WA University Library
• Seattle Public Library (downtown branch)
• King County Branch Libraries: 
  o Bellevue Regional
  o Issaquah
  o Lake Hills
  o Newport Way
  o North Bend