The final vote could come Tuesday on a proposal to create a wilderness area known as Wild Sky.
The U.S. House of Representatives is scheduled to consider a package of bills dealing with federal properties, including the one that would establish the 106,000-acre wilderness north of Index in eastern Snohomish County.
Also included in the package is a bill sponsored by U.S. Rep. Jay Inslee, which would give national park status to the site on Bainbridge Island from which the first Japanese Americans were sent to internment camps during World War II.
This omnibus legislation was passed by the U.S. Senate on a 91-4 vote April 10.
If approved by the House, it will go to President Bush who is expected to sign it.