This project involved the removal of the existing double barrel (10-foot by 5-foot) reinforced concrete box culvert constructed in 1961. The existing box culvert was 44 feet in length and showing signs of distress as well as hydraulic inadequacy. The replacement structure is a single-span precast, prestressed, 17-inch concrete deck beam structure. The structure is supported on concrete spill-thru pile bent abutments. The new structure is 45 feet in length and 48 feet in width with no skew. The cross section of the bridge includes two 18 -foot travel / parking lanes and 5-foot sidewalks on both sides of the bridge with a concrete parapet wall and aluminum bridge railing. This project was complicated by the presence of separate sanitary and storm sewers in close proximity to the north abutment, as well as a 6-inch potable water main running under the length of the proposed bridge. The project also provided connection to the existing sidewalks and the Washington Recreational Trail.

This project was constructed with local funding from the city of Washington. HEI completed the field surveying, hydraulic analysis, Preliminary Bridge Design & Hydraulic Report, environmental coordination, public involvement, traffic control plan, utility coordination, structure design, and approach roadway design. The plans, specifications, and estimates were prepared for a local construction bid letting coordinated by HEI.