509.837.5141 | P.O. Box 810, Sunnyside, WA 98944

System Information

System Map (Yakima County GIS)

Main Canal

• 94.8 mi. in length
• X ft. of drop from headworks to dam end
• 5.0 mi. of shotrock riprap - one side only
• 24.2 mi. of concrete lined canal
• 743 ac. of water surface
• 2.0 mi. of concrete lined canal-one side only
• 2052 ac. of right-of-way
• 4.5 mi. of tunnels
• 9.7 mi. of concrete wasteway
• 1.8 mi. of inverted siphons
• 14.8 mi. of unlined wasteway
• 187.0 mi. of main canal roads

Laterals/Canals

• 108.5 mi. of earthen laterals
• 272 mi. of pipe laterals
• 2321 deliveries
• 66.6 ac. of water surface
• 1081 ac. of right-of-way
• 234 mi. of lateral roads

Pumps

There are 18 pumping plants containing 57 electric pumps along with 10.8 miles of discharge pipe serving approximately 27,000 acres. The maximum lift is 253 feet. The Roza Power Plant is a reserved works feature owned and operated by the Bureau of Reclamation. The district buys power at the pumping plants.

Drains

• 31.6 mi. of open drain
• 12.0 mi. of pipe drain
• 1.6 mi. of drain lined with shotrock
• 30.0 mi. of road along drains

 

Miscellaneous

• Water surface elevation at headworks – 1220.6 ft. ams
• Water surface elevation at mile 94.6 - 1041.9 ft. ams
• Approximate elevation of Yakima River at Wasteway 7 – 490 ft. ams
• Widest section of main canal – 101 ft.
• Maximum capacity of main canal – 1300 cfs
• Summer operating waste – approximately 2%
• Evaporation rate per year from canal and laterals – 3150 acre-feet
• Wasteway 6 Reregulating reservoir – 155 acre-feet
• Wasteway 7 Reregulating reservoir – 10 acre-feet
• Wasteway 5 - re-req