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Welcome to W. M. Lyles Co.

Progress Through Performance

W. M. Lyles Co. is a heavy-civil and utility contractor with a successful record of performance, safety, and reliability. For more than 70-years, W. M. Lyles Co. has performed its work with integrity, honesty, and a careful eye on the needs of our owners, employees, and environment. With hundreds of successfully performed projects in the wastewater, sewer, and clean water delivery sectors, W. M. Lyles Co. is proud to know that our work positively affects our communities, friends, and families.

W. M. Lyles Co. has become an industry leader in the construction of both private and public water and wastewater treatment plants. Our “open book” approach to the construction of these plants has allowed us to assist owners in their growing need for a Design-Build Project Delivery System.

W. M. Lyles Co. remains a leading contractor in our State for the installation of pipelines and underground utilities. With a network of offices covering California, W. M. Lyles Co. has performed work ranging from: the infrastructure for five state/county prison sites, the first producing ethanol facility west of Colorado, large water banking systems, pump stations, gas distribution, underground utilities and structures of all shapes and sizes, and renewable energy projects. Our work varies greatly within our long list of owners and partners; please review our “Projects” section to see the variety of the work we perform.

2017 Newsletter


This year, LCG was ranked by ENR number 10 in the nation for wastewater treatment construction. This is up from number 12 last year. We have also improved our ranking in two other areas: ENR Top 400 National Contractors, from 282 to 259; ENR Top 200 Environmental Contractors, from 62 to 44. This is the first year that ENR analyzed firms in the design-build market; LCG was ranked 92 in the Top 100 Design-Build Firms. LCG also held steady with its ranking of 39 in the ENR California Top Contracting Firms. Our capacity to rank high in these areas is exceptional for a self-performing contractor, as the lists are dominated by publicly traded CM firms delivering mega projects where they typically don’t self-perform their work.

Our ability to meet the needs of our clients on challenging projects is what we strive for, where we excel, and what will keep us at the forefront of California construction.



ENR Top 400 Contractor #259

ENR Top 200 Environmental Firm #44

California Top Contractor #39

2016 Top 200 CA Contractor

ENR Top 200 Environmental Firm #62

Top 200 2016

Featured Projects


Fairfield-Suisun Sewer District Slide Gate Replacement Project

Work generally consisted of furnishing and installing four new Type 316L stainless steel heavy duty slide gates to replace existing aluminum slide gates, which were experiencing severe galvanic corrosion.


Central Contra Costa Sanitary District Sludge Blending Tank Repairs

The work generally consisted of saw-cutting and demolition of approximately 200 square feet of gunnite around the top edge of the existing concrete Sludge Blending Tank while in service and installation of grout transition from new to existing work.