Baker Bay Trail and Boardwalk Trail and Boardwalk Design, Phase 1 and 2
Washington State Parks and Recreation Commission

For this multi-phase project at the confluence of the Pacific Ocean and Lower Columbia River, Vigil-Agrimis, Inc. (VAI) provided preliminary design through construction period services. Project objectives were to design a 1,400-foot trail, boardwalk, and associated site elements respective of tidal elevation changes. The Baker Bay Trail connects elements designed by Maya Lin as part of the Confluence Project.

In Phase 1: Preliminary Design, VAI developed two schematic trail alignments and cost estimates. Each alternative includes elevated sections of boardwalk and a number of interpretive nodes and overlooks. In addition to the trail alignments, the design included a road realignment, parking lot reconfiguration and resurfacing, stormwater management, large rock retaining wall, and restoration planting plan for a tidal wetland adjacent to Baker Bay. Native plants were selected based on compatibility with the salinity gradient. VAI also developed a table describing the range of tidal fluctuations to ensure all site design elements remain above high tide, and trail alignments were evaluated from a permitting perspective.

In Phase 2: Design Development and Construction Documentation, VAI refined the preferred alternative into two construction packages with cost estimates and specifications for phased construction. VAI collaborated with WSP&RC to develop the construction package concurrent with other design and construction projects that were underway. VAI also provided permitting support.

Phase 2a was constructed in fall 2009. It extends from the upper parking lot to the boat launch and includes road realignment, parking lot reconfiguration and resurfacing, drainage design—including swales and pipes, large rock retaining wall, oyster shell concrete trail and interpretive nodes and overlooks. VAI provided construction observation for this phase. Phase 2b construction, originally planned for 2012, will likely be postponed due to inadequate funding. It extends from the upper parking lot to the amphitheater and includes an elevated walkway, trail, boardwalk, and interpretive nodes and overlooks.