A detailed and comprehensive report on the design and construction of the Columbia River Interstate Bridge, a major infrastructure project completed in the mid-20th century. Harrington provides a thorough analysis of the technical, engineering, and financial aspects of the project, as well as its impact on the local community and the broader region. This report is a valuable resource for anyone interested in the history of transportation and infrastructure in the Pacific Northwest. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.