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Figure 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 ~- CONTENTS - Continued Surface velocities in approach channel to Union Avenue dam, grid spacing = 18 feet, A! = 8.5 seconds, Q = 1,000 ft'/s . . . . _ . . . . . . . Surface velocities in approach channel to Union Avenue dam, grid spacing = 18 feet, A! = 8.5 seconds, Q = 1,500 ft'ls . . , . _ . . . . . . . Surface velocities of boatchute 1, grid spacing = 18 feet, A! = 3.4 seconds, Q = 500 ft'ls . . . . . . . . . . . . . . . . . . . . . . . . , , . . . . . Surface velocities in pool downstream of boatchute 1, grid spacing = 8 feet, At = 3.4 seconds, Q = 1,000 ft'ls ....,........... Surface velocities downstream of boatchute 1, grid spacing = 18 feet, A! = 3.4 seconds, Q = 1,500 ft'/s ....... _ . . . . . . . Streak Jines in first pool between boatchutes 1 and 2, Q = 1,500 ft'ls . . . . . . . . . , . . . . . . . . . . . . . . , , . . . . . . . . . . . . . . . . . Boating conditions with open-bar barrier in front of primary Englewood intake . . . _ . . . . . . . , , . , , . . . . . . . . . . . . . . . . . . . Approach flow velocities upstream of Englewood intake (Q = 240 ft'js) . . . . . .. . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approach flow velocities upstream of Englewood intake (Q = 811 ft'/s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . . . . . . . . . . _ . . Approach flow velocitfes upstream of Englewood intake (Q = 1,450 ft'/s) ... _ . . . . . . . . . . . . . . _ . . . . . . . . . . . . . . . . . . . . . . Area between two boatchutes prior to sediment test ................. Overhead view of area between boatchutes prior to sediment test ....... Contours of pool area between boatchutes 1 and 2 prior to sediment test ........,................................. Contours of pool area between first and second boatchutes after to sediment test .... . . . . . , , , . _ . . . . . . . , . . . . . . . . . , , . . . . . . . Area between boatchutes after sediment testing ,.................,. Deposition after sediment test ............"................... Dunes formed upstream of the boatchute 1 after sediment test ......... Model with flow at 16,400 ft'ls (IOO-year flood) .................... Water surface profiles through boatchute 1 .".............. . . . . . . . Section through Union Avenue dam showing reduction in rockfill from original boatchute design .......".... _ . . . . . . . . . . . . . . . . . v Page 37 38 39 40 41 42 43 44 45 46 47 47 48 48 49 49 50 50 51 51