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518 . Construction period: ,1913-15. Bypass bore constructed around collapsed eection in 1950. Length .................._.............. Diversion capacity....................... Cross section: Horseshoe lorlginal tunnel I Height ... .... ............ ..... ......... Width.................................. Lining: Concrete, thickness. . . . . . . . . . . . . . . . ORCHARD MESA POWER CANAL Location: From Government High Line Canal between Tunnels No.2 and 3 across river through Orchard Mesa Siphon and gener- ally lOuth to Grand Valley Powerplant and Orchard Mesa Pumping Plant. Construction period: 1922-24 Length.......... ,..... ...... ....... .... Divenlion capacity.... ,_ ...... ... .....".. Typical maximum section-open cimal: Bottom width.................,......... Side slopes.............................. ~;ater depth............................ Lining thickness. ........................ Typical maximum section-bench flume: Bottom width ............ ............... Side slopes: Yertical \\,'ater depth............................ Wall thickness: Top.................................... Bottom ................................. Typical maximum section-cut and cover conduit: Bottom width .......... ...... ....... .... Height................................ . Side slopes: Vertical W'ater depth............................ Concrete thickne88: Bottom................................. Sidewall... ............. ................ MANN"S GULCH SIPHON (ORCHARD MESA POWER CANAL) Location: Station 57+87 on the canal. about 1.5 miles east of Palisade, Colo. Type: Reinforced monolithic conerete Length........ .u.. ...........u....... Capacity........ .... ....... ............ Cross section: Circular Diameter ...... .... ........... .......... Grand Valley Project . 7.486 It 730 fe/s 11 It 1LS It 4 in 3.5 mi 800 ftJ/s 20 It 1:1 9.8 It 4 in 17 It 6.6 It 6 in 9 in 11 It 11.4 It 10.3 It 10 in 9 in 193 It 800 fPls 12 It ApPLEGATE DRA'" SIPHON AND WASTEWAY (ORCHARD MEsA POWER CANALl Location: Station 139+ 14 on the canal. about 0.5 mile southeast of Palisade. Colo. Type: Twin-barrel reinforced monolithic concrete Length ...uu.u... uu.... u .......... Capacity..... ...... ...... .,'.. ..... ..... Cross section: Two 8.ft- square barrels ORCHARD MESA CANAL No.1 ........~.from Orchard Mesa Pumping Plant, ahout 0.5 mile south of Palisade. Colo., southwesterly to a point about 1 mile south of Grand Junction, Colo. Length ...... .............. .Uu........ Diversion capacity....... ........ ........ Typical maximum section: Bottom width. .......................... 140 It 800 ft3/s 15.5 mi 85 ft3/s 8 It Side slopes.......... ..... ........ ....... \l'ater depth ............................ BIG W ASH SIPHON (ORCHARD MESA CANAL No.1) Location: Station 3+ 18.4 on the canal. Type: Precast concrete pipe Length 'u...u.........._u..u.Uuu, Capacity.......... ....... ...... ........ Cross 8ection: Circular Diameter ............. .................. STEEL SIPHON /ORCHARD MESA CANAL No. 11 Location: Station 4+50on the canal. Type: Riveted plate steel Length............... u....... u....... Capacity ............................... Cross section: Circular Diameter............. ...... ............ 1.5:1 3.1 It 780.6 It 80 ft3/s 4.5 ft 1,321.5 It 80 fels DOUBLE WASH SIPHON No. ] (ORCHARD MESA CANAL No. II 4.5 It Location: Station 346+62 on the canal. Type: Precast concrete pipe Length ._............ ....._ ........_.... Capacity............ ............... .... Cross section: Circular Diameter... .................... ..; ..... 375.5 It 80 fels DOUBLE WASH SIPHON No.2 lORCHARD MESA CANAL No.1 t 4.5 It Location: Station 356+44 on the canal. Type: Precast concrete pipe Length .....................,......._... Capacity.............................. . Cross section: Circular Diameter ............................... CoNCRETE SIPHON WRCHARD MESA CANAL No. 11 Location: Station 8+ 16 on the canal. Type: Precast concrete pipe Length ....,....... ..... .......... ...... Capacit), .......... ..... ................ Cross 8ection: Circular Diameter................... ..,...... ... ORCHARD MESA CANAL No.2 Location: From orchard Mesa Pumping Plant. about 0.5 mi south of Palisade. Colo.. southwesterly to a point about 2.5 mi southeast of Grand Junction. Colo. Length .........._...................... Diversion capacity. ....... ...;.... ....... Typical maximum section: Bottom width ........ ........ ........... Side slopes.............................. W'ater depth...............;............ STEEL SIPHON (ORCHARD MESA CANAL No.2) Location: Station 13+240n the canal. Type: Riveted plate steel pipe Length .......... ............ ......... ,. Capacit), .... ................ ........... Cross section: Circular Diameter ............................... STEEL SIPHON fORCHARD MESA CANAL No. 21 Location: Station 21 + 29 on the canal. Type: Riveted plate steel pipe 503 It HO ft3/s 4.5 It 737.8 It 14.3 ftJ/s 1.75 ft 16.1 mi 65 ft3/s 7 It 1.5:1 2.8 It 426_5 It 6U 1t3/s 4 It