The Marine View Drive Bridge (SR 509) was first identified in 1989 as a box-culvert replacement in the Des Moines Creek Restoration Project. The 4-foot by 6-foot concrete box-culvert was built under embankment fill approximately 60-feet high, which separated Des Moines Beach Park from Des Moines Creek Park. Urban development resulted in an increased volume of water discharge to the existing culvert and as a result, the culvert acted as a high velocity fish barrier.

INCA Engineers provided plans, specifications, and estimates for construction of a bridge to replace the existing culvert. The design resolved several issues and included a pedestrian trail to connect parks, fish passage to the upper reaches of the creek, increased hydraulic capacity, and a utility corridor for the Midway Sewer District’s proposed 48-inch diameter sewer outfall. The project incorporated a concrete bridge, retaining walls, pedestrian trail, stream relocation, landscaping, storm drainage, paving, curbs and gutters, and other improvements. The street drainage design included modifications to the existing drainage system in the immediate vicinity of the bridge improvement.

This project has won the ACEC Engineering Excellence Award ”Bronze for Original or Innovative Application of New or Existing Techniques” 2008 and the ASCE “Award of Excellence” 2007.