Hundreds of volunteers helped with Washington’s 175th Anniversary Celebration and in an effort to thank those who lended a hand, the 175th Steering Committee is hosting a thank you barbeque tomorrow. The Chamber estimates volunteers contributed over $15,000 worth of labor during the week-long celebration. The thank you event will be held at 6 p.m. tomorrow at Diane Gallagher’s farm at 2511 190th Street, north of Washington.