RHC Engineering

Analysis, Design, and Construction Support for Infrastructures


Constructible, Resilient, and Sustainable Engineering Solutions

Projects

Washington State Department of Natural Resources
Lower High Point Bridge
Project Details... RHC Engineering provided the plan, specification, and cost estimation for the 30%, 90%, 100%, and bid package of the replacement bridge. The new bridge is a 200 foot long self-weathering steel truss structure. Due to the difficult site condition, the bridge was designed to accommodate constructability requirements by splicing the truss segments and designing them for field assembly.It stands 30 feet above the creek, with unique curved columns on spread footings.
Washington State Department of Transportation
State Route 520 West Side
Project Details... RHC Engineering supported the SR 520 program in civil and structural preliminary engineering and concept design for multiple elements in the west corridor. We performed civil engineering design and right of way plan development. Our structural engineering services consisted of two, 400 foot long curved pedestrian bridges and post-tensioned box structures, one 200 foot long pedestrian tunnel, over 20 retaining walls, one HOV vehicular ramp bridge designed for future light rail compatibility, storm water structures, refining structural design criteria, and advanced seismic analysis.
Washington State Department of Transportation
Interstate 90 Peak Use Shoulder Lanes
Project Details... RHC Engineering provided final design for the I-90 Peak Use Shoulder Lanes project, including plans, specifications, and cost estimates for multiple structural engineering elements.
City of Seattle Department of Transportation
North 41st Pedestrian Bridge
Project Details... RHC Engineering is providing seismic retrofit design for the historical reinforced concrete pedestrian bridge. The bridge includes two counterweight cantilever spans and one drop-in span crossing over State Highway 99.
King County Parks and Natural Resources Department
Coal Creek Bridge Number 5
Project Details... RHC Engineering provided inspection, load rating, as-built drawings, concept repair design and cost estimates for the old, BNSF steel plate girder bridge.
City of Bainbridge Island
Waterfront Bridge
Project Details... RHC Engineering provided inspection, load rating, as-built drawings, concept replacement design and cost estimates for the old, glulam girder bridge.
City of Seattle Department of Transportation
Post Avenue Bridge
Project Details... RHC Engineering provided condition survey of the adjacent historical Colman Building, performed structural analysis on impact to the building due to the bridge removal and pavement reconstruction process, and assisted submittal review during construction.
City of Seattle Department of Transportation
West Dravus Street over 15th Avenue West Bridge
Project Details... RHC Engineering provided load rating for the reinforced concrete T-beam bridge.
City of Seattle Department of Transportation
Cowen Park Bridge
Project Details... Using three dimensional finite element models, including plate and shell elements, RHC Engineering provided seismic vulnerability analysis and service condition load rating analysis for the historical arch bridge. Our analysis showed consistent results with observed longitudinal cracks under the deck and vulnerable elements under earthquake events. This arch bridge consists of five unique units of irregular reinforced concrete components including multi-cell box girders, T-beam girders, and reinforced concrete solid slabs.
City of Seattle Department of Transportation
Northeast 45th Street Viaduct East Approach
Project Details... RHC Engineering provided seismic vulnerability analysis for this reinforcement concrete bridge composed of different geometries and span types supported by batter piles in highly liquefiable soft soil.
City of Seattle Department of Transportation
Ship Canal Crossing Study
Project Details... RHC Engineering provided two options of pedestrian bridge approach spans landing alignment and concept bridge design.
Sound Transit North Link Construction
North Link Construction
Project Details... RHC Engineering provided seismic bracing design for electrical equipment supported by cable trays and for electrical conduits