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Figure 1 2 3 4 5 6 7 8 9A 9B 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 CONTENTS - Continued FIGURES Section through existing Union Avenue dam showing typical reverse roller hydraulic jump . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . Kayaker at Brown's Ditch dam boatchute .......,................' Recommended boatchute configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . Section along centerline of Union Avenue dam boatchute (boatchute 1) ......... _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sections through Union Avenue dam boatchute . . . . , . . . . . . . . . . . . . . . . Model study area ...... _ . . , . . . . . . . . . . . . . . . . . . . . , . _ _ _ . . . . . . . . Settling velocity of sand and silt in water . . . . . . . . . . . . . , . . . . . . . . . . . . Model and prototype grain size distribution for bedload ..".......... Union Avenue dam discharge rating curve (with boatchute) . . . , . . . . . . . . Union Avenue dam discharge rating curve (with boatchute) . . . . _ . . . . . . . Union Avenue dam radial gate discharge rating curves with boatchute ...................................."..... Englewood intake discharge curves ".................... . . . . . , . . Boatchute I constructed in model - original design ..............'... Boatchute 2 - original design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Open bar-type barricade constructed along Englewood intake .......... Union Avenue dam boatchute 1 narrowed with rocks ................ Boatchute 2 narrowed with rocks ..............,.... _ . . . . . . . . . . , Union Avenue dam modification of boatchute with single ramp in center of chute . . . . . . . . . . . . . . . . . . . . . . . . . . , , . . . . . . . . . Section through existing spillway showing modifications with wedge block androckfill on downstream face............. ........ Design with two ramps in center of boatchute 1 .................... Boatchute 1 with ramp extending across boatchute, no center trough along ramps ...,............................ Kayak proceeding through boatchute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Boatchute 1 with trough through first ramp . . . . . . . . . . . . . . . . . . . . . . . . Another view of first boatchute . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . V -wave pattern in first boatchute ............................... Boat proceeding through first boatchute .................,........ Boatchute 2 ...... _ . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water surface vs. discharge in pool between boatchutes 1 and 2 ......,. Water surface elevation vs. discharge between boatchutes 2 and 3 ....... Overall view of model with final design at 1,500 ft' Is. ................ Boatchute 1 at 500 ft' /s ...................................... Boatchute 1 at 1,500 ft' /s ..........,.......................... Boatchute 2 at 500 ft' /s ..".......,.,........................ Boat going through boatchute 2 at 1,500 ft' /s .........,............ iv Page 17 17 18 19 20 21 22 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36