WDFW Lower Forks Creek Hatchery Intake and Stream Restoration

KPFF recently provided WDFW with civil and structural design services to improve the hatchery pumped intake operations for the Lower Forks Creek Hatchery. The hatchery was originally served by the pumped intake located along Forks Creek and a siphon intake located upstream of the hatchery. With the removal of the siphon intake, the pumped intake required upgrades in order to combine the water right to one location to maintain the existing water right. The new pumped intake was designed to pump water to an above-grade distribution box to gravity feed the hatchery operations. The new pumped intake also included a fish ladder, improving migration upstream. With the removal of the siphon intake, habitat restoration in the form of large woody debris and installation of stream bed material has improved habitat quality and access. Design services also included hydrologic and hydraulic modeling of the Forks Creek. Deliverables included plans, specifications, construction cost estimates at 30%, 60%, 90% and 100% level of design. KPFF also prepared permit drawings for submittal to the Army Corps of Engineers and is providing support during the construction phase of the project. The last phase will include removal of the existing low-head dam along with the full demolition of the siphon intake upstream. Demolition of the low-head dam further improves the spawning habitat connectivity.