Colorado Avenue Dam Safe Passage Project; Bend, Oregon

November 21, 2014

Otak is leading a multidisciplinary team to enhance recreation opportunities while preserving fish habitat at the Colorado Avenue Dam in Bend, Oregon. The project will provide a passage over the existing dam for many types of river users, including inflatable craft (inner tubes and rafts) and hard-shell boats (kayaks), while providing upstream and downstream passage for fish and preserving habitat and in-stream flows on the right riverbank. A center channel includes four different standing-wave features to accommodate various whitewater play such as river surfing and whitewater kayaking over a wide range of flows and skill levels. In addition, the project includes a new pedestrian bridge with sufficient clearance above the river to allow safe and comfortable passage of river users.

Otak’s work includes overall project management, initial site assessment (geomorphic and stability of the existing dam), hydrologic analysis, hydraulic modeling of existing and project conditions, floodplain analysis, analysis of sediment transport and channel stability, a management plan for frazil ice, design of the new pedestrian bridge, preparation of construction documents, construction engineering, post construction operation and maintenance plan, and cost estimates for the project. Otak assisted the project owner with selection of a CMGC Contractor and collaborated with the selected contractor, Hamilton Construction Company, during final design.

Design Team Members Include:


Dave Place Consulting, and East Slope Cultural Services

 Above is a time-lapse video of ongoing construction. To view a live webcam of the project, please click here.