Whychus Creek tumbles down the eastern flank of the Cascade Mountains, through the City of Sisters, OR and into a deep canyon before joining the Deschutes River near Lake Billy Chinook. Irrigation water demands on Whychus Creek far exceed natural water supply and for 100 years, irrigation water withdrawals dried up the creek before it reached Sisters.This project, a partnership between the Three Sisters Irrigation District, the Deschutes River Conservancy and multiple funders, supports the final phase of a decade-long effort to modernize water delivery infrastructure through pipeline construction, enhancing water security and instream environmental benefits.