OUR PROJECTS
Explore some of TWM’s projects that demonstrate our design expertise, technical knowledge, and comprehensive range of capabilities.
LATEST PROJECTS
TWM has built a solid reputation over the past 80 years. Our clients trust us, and we stand behind our work. Find out more about our engineering and geospatial projects.
Engineering
Longview Boulevard Improvements
Winner of the APWA Missouri Chapter 2025 Project of the Year Award | Less Than $1,000,000 Category This project improved neighborhood safety and acce [...]
Tecklenburg Trail
Winner of the 2026 ACEC Illinois Special Achievement Award | Transportation Providing West Belleville with access to the expanding MetroBikeLink trai [...]
I-74 Bridge Over Griffin Street & Stony Creek
Currently under construction, TWM provided Phase I engineering services for the superstructure replacement of one pair of dual interstate bridges and [...]
I-24 Bridge Over The Ohio River
As part of a Various Various contract with IDOT District 9, the District assigned TWM a work order to rehabilitate the bridge carrying I-24 over the [...]
Millennium Park
TWM recently completed civil engineering design for Phase 1 renovations at Millennium Park in Creve Coeur, MO. Enhancements include a 10’ wide concre [...]
Fire Tower Subdivision
Fire Tower Subdivision is a proposed 155-lot single-family residential subdivision in Hamilton County, TN. Civil planning included site and lot layou [...]
Water Reclamation Facility Expansion & CSO Lift Station
TWM provided the complete design of this treatment plant expansion, from facility planning through construction phase engineering, increasing design [...]
Hydraulic Model & Water Infrastructure Master Plan
The Village of Freeburg's existing water system needs upgrades to provide adequate fire protection and replace water mains and tanks. TWM prepared a [...]
Shiloh Pavement Management System
In order to improve the management of the Village’s pavement, TWM created a full inventory of their roadways using MicroPaver™. The inventory databas [...]
Bi-State/Metro Pavement Maintenance & Management Program
TWM developed a pavement maintenance and management program for 37 parking facilities for METRO bus/rail in the St. Louis area that met federal FTA T [...]
IAWC Garage Expansion
This design-build project involved construction of a 9,725’ addition to the existing Illinois American Water Company (IAWC) garage. Scope included to [...]
Patty Ann Court Sanitary Sewer Extension
This design-build project extended the sanitary sewer along a private road to serve three properties that were originally on septic systems. TWM work [...]
Various ILAW Water Main Construction Observation
We have completed construction observation for various ILAW districts throughout Illinois. These projects include full time observation of the work, [...]
MetroBikeLink Trail System
TWM has provided on-going design and construction phase services to the St. Clair County Transit District for the extension of the MetroBikeLink Trai [...]
Edgemont Booster Improvements
The Edgemont Booster Pump Station site uses two ground storage tanks and a pump station to maintain pressures throughout the Belleville gradient. The [...]
Carlyle Lake Sewer Camera & Smoke Testing
TWM performed on-site testing and inspection services for the USACE, spanning multiple sections of Carlyle Lake, from Boulder Campground to Coles Cre [...]
Geospatial
Clark Street Storm Sewer Improvements
TWM was contracted to provide a topographical survey for design engineering of approximately 3,500 linear feet of storm sewers under an urban roadway [...]
USACE Lake Shelbyville AP Boundary Survey
TWM performed recovery and restoration surveys in order to recover or reestablish Corps boundary angle points (A.P.) and bearing objects. Using origi [...]
Saint Louis Zoo Primate Canopy Trails
TWM was contracted to provide construction layout for the new Primate Habitats and Canopy Trails. While initial layout only included the layout of a [...]
Historic Kirkwood Train Station
TWM was hired to perform a 3D terrestrial scan of the interior and exterior conditions of this historic train station. The architect had requested th [...]
ADA Transition Plan
Winner of the 2025 ACEC Illinois Special Achievement Award | Studies, Research, & Consulting Engineering Like many cities, Pekin has struggled ke [...]
Washington Stormwater Assessment Plan
TWM helped the City develop a stormwater assessment plan to aid in establishing a comprehensive approach for future improvements. Through the use of [...]
16 Mile 69kV Electric Transmission Line LiDAR
From New Berlin - Pisgah, UAV LiDAR was collected on 16 miles of a 69kV electrical transmission line to assist with engineering a line-rebuild. High [...]
USACE Lower San Joaquin River Valley Feasibility Study
Perform aerial LiDAR and orthophotography topographic mapping along a 23-mile corridor of the Lower San Joaquin River Valley. To ensure the accuracy [...]
USACE Lock & Dam 25
The St. Louis District of the U.S. Army Corps of Engineers will be designing and constructing a new 1,200’ pile-founded lock in the auxiliary miter g [...]
USACE MESD Topographic & Bathymetric Surveys
Perform planimetric, topographic, and bathymetric surveys (+/- 11.5 acres) in order to assist with the completion of the plans and specifications for [...]
Des Peres GIS Application Service Provider (ASP)
Converted data is stored via on-premise servers and is securely distributed through a web-enabled server, providing the ability to analyze, update, a [...]
East Peoria GIS On-Call Support
TWM is providing interim GIS System Administration for the City of East Peoria. This includes managing multiple servers, databases, and portal that m [...]
CLS Prairie Power – Saidora to Bluff Springs
Before the design of nearly 29 miles of electric transmission lines across Cass and Mason County could commence, TWM first established a primary cont [...]
Fort Leonard Wood AC Water Main Replacement
Fort Leonard Wood contained a substantial amount of asbestos cement water main originally installed in the 1960s and implemented a program for replac [...]
MidAmerica Airport Terminal Phase 2
Scope for phase 2 involves relocating the facility’s gas service and building the exterior shell for the expanded terminal building. The 41,000 squar [...]
Auffenberg Auto Mall
TWM collaborated with the Auffenberg Car Dealership to master plan their new state-of-the-art Auto Mall Facility. The 50+ acre development encompasse [...]
EXCEPTIONAL SERVICE. NOTHING LESS.
That’s our company mission and our promise to you. Our success is built upon a solid reputation for getting the job done right. One thing we are particularly proud of is approximately 95% of TWM’s work comes from repeat business. We believe our resolution of challenges sets us apart, and based on our level of repeat business, we think our clients will agree.