The Bureau of Reclamation requested proposals for bid for the Cle Elum Dam Juvenile Fish Passage Tunnel. The project consists of various earthworks and permanent slope stability measures, as well as the construction of an approximately 1,200 ft (366 m) long tunnel with an approximate diameter of 11 ft (3.35 m). The tunnel will connect the Cle Elum lake to a previously constructed ovoid secant pile shaft, which will eventually house a helical-shaped reverse fish ladder structure to allow for juvenile fish to bypass the Cle Elum Dam on their way downstream.
Gall Zeidler Consultants (GZ) provided bid support services for Guy F. Atkinson Construction addressing tunneling scopes of work, such as value engineering for tunnel activities, excavation of the secant pile shaft, tunnel outlet portal and access shaft, tunnel excavation, and tunnel lining.
Juvenile Utility/Facility Tunnel
1,200 ft (366 m)
7 ft (2.1 m) finished internal diameter
Glacial outwash material consisting of sandy gravel with trace fines content
Guy F. Atkinson Construction
U.S. Department of the Interior Bureau of Reclamation