Piping to save water in Tumalo Irrigation District
The Tumalo Irrigation District in Central Oregon could save 4.9 billion gallons of water per season by converting nearly 70 miles of open ditches to pipes, according to a preliminary study by the USDA Natural Resources Conservation Service.
Greater efficiency means more water available in-stream for fish and wildlife in the Deschutes River and Tumalo Creek, including Chinook salmon, summer steelhead, bull trout and the Oregon spotted frog, which was the subject of an environmental lawsuit in 2016.
The TID Irrigation Modernization Project calls for updating infrastructure to boost water conservation, enhance stream flows and provide greater reliability for farmers in the 28,000-acre district northwest of Bend.
Project funding is available in part through the NRCS, which released its draft Watershed Plan and Environmental Assessment on April 16. A public meeting is scheduled for 6-7:30 p.m. Tuesday, May 8, from at the Cascades Academy on Tumalo Reservoir Road in Bend.
Tom Makowski, assistant state conservationist for Watershed Resources and Planning with NRCS Oregon, said feedback will help the agency craft a final analysis and recommendation, which then goes to NRCS National Headquarters for authorization.
The entire project is expected to cost roughly $43 million, broken up into seven phases through 2028. The first phase, which Makowski said they hope to start this fall, will be the focus of the May 8 meeting.
Phase I will replace 1.9 miles of Tumalo Feed Canal, with $4.7 million provided by the NRCS Watershed Protection and Flood Prevention Act. The district will also foot $1.5 million.
The Tumalo Irrigation District serves 667 patrons and 7,417 acres of irrigated land. Its two primary diversion sources are Tumalo Creek below Shevlin Park and the Deschutes River near Pioneer Park, along with water in Crescent Lake.
Natural resource agencies have identified stream flows in the region as a primary concern. A lawsuit filed by the Center for Biological Diversity and WaterWatch of Oregon against the Bureau of Reclamation and five irrigation districts — including Tumalo — over spotted frog habitat was settled in 2016.
According to the NRCS analysis, the district’s antiquated irrigation canals and laterals also make it difficult to deliver the correct amount of water to patrons on time, particularly early and late in the season. The modernization project would provide a more reliable source of irrigation water, while also reducing energy costs by removing the need for most patrons’ individual pumps.
TID patrons currently use individual pumps to pressurize water from their private ditch or pond. Together, these pumps use approximately 6 million kilowatt-hours of electricity per year, costing $584,000.
The TID Irrigation Modernization Project is a collaboration between the district, NRCS, Deschutes Basin Board of Control and Farmers Conservation Alliance, based in Hood River, Ore. The NRCS is also developing draft plans for two other draft Watershed Plans for the Central Oregon and Swalley irrigation districts to take advantage of agency funding. The public scoping period is now closed for both of those proposals.
