Analysis, Design, and Construction Support for Infrastructure
RHC Engineering Inc. is a Seattle-based structural and civil engineering practice specializing in infrastructure, with a primary focus on bridge engineering. It provides analysis, design, inspection, and load rating for all bridge types, as well as roadway and retaining wall design, fish passage structures, trolley overhead catenary systems, and structural design for energy and green infrastructure. Clients include the Washington State Department of Transportation, Washington State Department of Natural Resources, City of Seattle, King County Parks, and Sound Transit.
Provides comprehensive structural engineering for vehicular and pedestrian bridges, covering all stages from initial planning and concept alternatives to final design, inspection, and load rating.
Develops final engineering design packages including plans, specifications, and estimates for agency review and construction bidding.
Creates preliminary structural designs, alignment layouts, and cost estimates for transportation corridors, pedestrian crossings, and retaining structures.
Conducts seismic evaluations under strength and extreme event limit states, identifying structural deficiencies and engineering retrofit solutions.
Performs field inspections and structural assessments of pedestrian and vehicular crossings to identify deficiencies and recommend rehabilitation actions.
Evaluates structural load capacities, performing rating analyses that account for construction staging and special hauling vehicles.
Studies geometric constraints and structural options to optimize multi-modal corridor and waterway crossing alignments.
Provides construction-phase technical assistance, including design reviews, submittal evaluations, and on-site support.
Delivers design solutions for roadways, retaining structures, and site infrastructure.
Designs alignments, profiles, and lane layouts for transit, highway, and local roadway corridors.
Engineers structural retaining walls and earth retention systems for transportation corridors and grade changes.
Work in this area is organized into supported delivery tasks.
Support includes Designs structural systems to support ecological connectivity.
Support includes fish migration.
Support includes regulatory compliance for waterways.
Performs structural analysis and design for transit overhead catenary systems.
Engineers structural foundations and supports for power, energy, and green infrastructure installations.
Bridges · Transportation · Highways & Roads · Transit · Government · Water Resources
Washington · Bridges · Client: Washington State Department of Natural Resources
Designed a replacement 200-foot-long steel truss bridge located 30 feet above a creek, featuring unique curved columns on spread footings. Scope included alignment alternatives, final PS&E design packages, and construction technical support.
Washington · Bridges · Client: Washington State Department of Transportation
Provided preliminary engineering, conceptual designs, and cost estimates for structural components along the corridor, including two 400-foot post-tensioned pedestrian bridges, a pedestrian tunnel, over 20 retaining walls, and an HOV ramp bridge.
Seattle, WA · Bridges · Client: City of Seattle Department of Transportation
Performed seismic vulnerability analysis on five unique units of irregular, reinforced concrete superstructure, identifying deficient elements on columns, crossbeams, and girders, and recommending retrofit strategies.
Bainbridge Island, WA · Bridges · Client: City of Bainbridge Island
Conducted field inspections and load rating evaluations for two pedestrian bridges, identifying structural deficiencies on a timber bridge and delivering replacement alternatives with cost data.