Oregon. River and harbor improvements in Oregon and Washington, hearings on subject of improvement of Coquille Harbor and River, Coos Bay Harbor, Clatskanie and Siuslaw rivers, Yaquina bar and Harbor, Umpqua bar and Harbor, Willamette River above Portland and Yamhill River, Oreg., Columbia and lower Willamette rivers below Vancouver, Wash., and Portland, Oreg., and mouth of Columbia River, Oreg. and Wash., Dec. 13 and 16, 1918.