Bend's Deschutes National Forest Service has given final approval for a special permit for the project.
They looked into objections the project would harm the environment, but found that not to be the case.
Rod Bonacker with the Froest Service is glad the project can finally go forward.
"Yeah, it's been a long process. We think we found a reasonable balance between what's best for the environment and Tumalo Creek and what is best for the residents and citizens of Bend. The way it works now, this new pipeline will leave more water in the creek and in terms of construction I believe the environmental impact will be nil, because it's going under a road."
The permit will allow the city of Bend to withdraw a maximum of 18.2 cubic feet per second from Tumalo Creek. It also calls for the city of Bend to monitor the flow of water both at the top and bottom of the pipeline.
Construction on the pipeline is expected to start in early December.