The Department of Defense, specifically the U.S. Army Engineer District Walla Walla, is soliciting proposals for a contract focused on graffiti removal at the Ice Harbor Indian Memorial in Walla Walla County, Washington. The primary objective of this contract is to partially remove graffiti from a historical rock imagery panel using chemical and air abrasive methods, while ensuring the preservation of the underlying images. This project is significant as it aims to maintain the integrity of cultural heritage sites, requiring contractors to have prior experience in rock imagery conservation and to adhere to federal preservation guidelines throughout the process. Interested parties should contact Ruth A. Johnson at ruth.a.johnson@usace.army.mil or call 509-527-7222 for further details, with the contract being awarded based on best value criteria.