Additional tests were conducted in an existing 1:100-scale model of the entrance of Rogue River, Oregon, to determine shoaling patterns, wave heights, water-surface elevations, and river current velocities in the lower reaches of the river. The improvement plans involved reorienting the mouth of the river and decreasing the width of the entrance. Also included were the installation of weir sections in the north and south jetties. It was concluded from test results that: (A.) The narrower, reoriented entrance of Plan 12 will generally result in smaller wave heights in the small-boat basin and lower reaches of the river than those obtained for existing conditions when the shoal is not present (Base Test 2). Wave heights will be substantially higher in the new entrance area, however, than in the existing entrance. (B.) Sediment will move into the new jettied entrance of Plan 12 for waves from all directions and may eventually migrate upstream and form shoals adjacent to the new structures that could restrict or prohibit navigation. (C.) The new entrance of Plan 12 will result in substantial increases in water-surface elevations (in excess of 7 ft for the higher discharges) in the lower reaches of the river when compared with stages obtained for existing conditions with the shoal removed (Base Test 2). (D.) The weir section in the new south jetty of Plan 13 will reduce water-surface elevations in the lower reaches of the river to some extent, as opposed to the Plan 12 stages; however, when compared with a no-shoal existing condition (Base Test 2), elevations still increased in excess of 4 ft for the higher discharges. (E.) The weir section and conveyance channel of Plan 13A will not reduce water-surface elevations in the lower reaches of the river significantly, as opposed to the Plan 13 stages. When compared with stages obtained for existing conditions when the shoal is not present (Base Test 2), elevations increased in excess of 3 ft for the higher discharges. (F.) Sediment will move (upstream) over and/or through the weir section in the new south jetty of Plans 13 and 13A, particularly at the higher tidal stages, and result in a shoal that will extend into the small-boat basin entrance.