Thouvenot, Wade & Moerchen, Inc. (TWM)

Full range of transportation design and construction observation services, including roadway design, traffic engineering, signal warrant analysis, roundabout design, and NEPA/Phase I services. TWM maintains a well-rounded team with Professional Traffic Operations Engineers (PTOEs) on staff.

• Roadway Design

  Design of urban and rural roadways, including intersection realignments, roadway widening, rehabilitation, ADA-compliant pedestrian facilities, right-of-way design, and streetscapes.

• Traffic & Safety Studies

  Traffic engineering studies, signal and stop-sign warrant analyses, traffic impact studies, safety evaluations, parking lot studies, safe-route-to-school studies, and congestion mitigation.

• Traffic Signal Design & Operations

  Traffic signal timing, construction plan development, field implementation, controller box troubleshooting, and traffic signal simulation, optimization, and synchronization.

• Bike & Shared-Use Paths

  Pedestrian and bikeway trail planning and design, delivering custom shared-use structures with goals focused on aesthetics, functionality, and cost-effectiveness.

• Pavement Management

  Pavement evaluation and ranking systems to help public sector clients accurately forecast short- and long-term roadway budgets.

• Grant Administration

  Expert guidance through the entire grant and funding process, assisting clients with identifying, preparing, and applying for competitive federal dollars.

Comprehensive structural design across all phases, including conceptual planning, preliminary and final design, specifications, and estimates. Focus areas include roadway and pedestrian bridges, retaining structures, industrial and wastewater facilities, and rail bridges.

• Roadway Bridges

  Comprehensive design from project scoping and conceptual alternatives to final plans, bridge hydraulics, specifications, and construction cost estimates.

• Pedestrian & Shared-Use Bridges

  Design of custom signature pedestrian bridges and shared-use structures, as well as rails-to-trails conversions of older bridge structures.

• Bridge Inspections & Load Ratings

  Robust monitoring and maintenance programs, including damage inspections, National Bridge Inspection Standards (NBIS) compliance, and bridge condition reports.

• Value Engineering

  Collaboration with construction contractors to propose engineering adjustments during construction that improve bridge design and realize cost savings without sacrificing functionality.

• Retaining Walls & Slope Stabilization

  Retaining wall structures designed for structural integrity and aesthetics, alongside slope stabilization techniques such as surface covers, drilled shafts, regrading, and groundwater drainage.

• Industrial Structures

  Custom structural engineering for facilities of all sizes, including industrial buildings, ports, platforms, chemical plants, and underground structures.

• Wastewater Structures

  Structural design for water handling facilities, detailing concrete tanks, foundations, masonry buildings, access platforms, walkways, retaining walls, and pipe bridges.

• Rail Bridges

  Structural solutions for the railroad industry, including railroad bridge design, temporary shoring, permanent retaining walls, and curved girder plans.

• Construction Phase Engineering

  Engineering support for contractors to develop safe construction and demolition methods, including cofferdams, braced excavations, jacking plans, falsework, and formwork.

Full-service civil engineering for public and private sector clients covering land development, water infrastructure, and drainage. Services address roadways, bridges, shared-use paths, sewers, water supply, and stormwater systems.

• Land Development

  Comprehensive planning and site design services for commercial, residential, and institutional developments, coordinating with reviewing and permitting agencies.

• Water Infrastructure

  Engineering design for water supply, sewer collection, treatment facilities, lift stations, and relief sewer systems.

• Drainage & Hydraulics

  Hydrologic modeling and design for stormwater management, flood control, and localized drainage solutions.

• ADA Transition Planning

  Consulting and planning services to help communities evaluate and improve pedestrian infrastructure to meet ADA standards.

Geospatial department offering advanced reality capture and conventional land surveying. Technical capabilities include 3D laser scanning, mobile LiDAR, aerial photogrammetry, and topographic mapping.

• Land Surveying

  Traditional land surveying solutions, including right-of-way, topographic, construction layout, and engineering surveys.

• Reality Capture

  Advanced geospatial data capture utilizing high-definition 3D laser scanning, mobile LiDAR, and aerial photogrammetry/UAV imaging.