Mr. Gorman provided the design of a bridge removal, stream and side channel restoration, and beaver dam analogs, and conducted hydraulic modeling for a reach of Johnson Creek near Portland, Oregon for Oregon Metro. The beaver dam analogs were designed to reconnect the adjacent floodplain that had been disconnected through stream channel incision resulting from deforestation and associated landuse conversion to agricultural and urban uses. Hydraulic modeling was conducted to provide a base flood elevation (BFE) no-rise analysis for the design. The objectives of the floodplain re-connection included flood storage, water quality improvement, groundwater recharge, and hyporheic exchange enhancement.
Johnson Creek Beaver Dam Analog Design
