The existing Hawker-Crawford Channel is a regularly maintained regional flood control channel which conveys storm flows from Rich Flood Control Basin (Rich Basin) southward through the neighboring communities and along lnterstate-15 (1-15), into San Sevaine No. 3. The subject reach of the channel is located just west of 1-15 and extends from Beech Avenue to its outlet into San Sevaine Basin No. 3 (existing channel). The existing channel is enclosed in a box culvert beneath Beech Avenue; below the box culvert, the existing channel continues across approximately 90 feet of grouted stone to an approximately 500-foot portion of unlined channel. Beyond the unlined channel segment the existing channel is concrete lined for approximately 2,200 feet until it goes under Cherry Avenue and then empties into San Sevaine Basin No. 3.
The proposed project is the realignment of the existing open channel into a subterranean storm drain. The proposed construction includes a new transition from the existing box culvert under Beech Avenue, a new approximately 2,000 LF subterranean storm drain facility south of Beech Avenue and parallel to it, and a new channel outlet structure in the northeast corner of San Sevaine Basin No. 1. The new channel outlet structure would connect flows with an existing low-flow channel within San Sevaine Basin No. 1 which conveys flows to the basin outlet and downstream into adjacent San Sevaine Basins. Associated construction activities would include the removal and reconstruction of portions of Beech Avenue and Cherry Avenue and of existing sidewalks, curbs, gutter and guard rails, and installation/replacement of 6-foot chain link fencing.