As a leading U.S. contractor in water, wastewater, and industrial water construction projects, we are committed to delivering maximum value to clients and their communities. MWH history dates to the early 19th century and features some of the world’s most groundbreaking water and wastewater innovations as well as specialization in client-focused collaborative delivery methods. The MWH family includes Slayden Constructors in the Pacific Northwest and Methuen Construction Company in the Northeast.

Our passion is to develop and install innovative solutions that protect people and infrastructure from the dangers of geohazards. Founded in 2002, GeoStabilization International® has combined the most experienced and responsive geohazard mitigation professionals in North America. GeoStabilization specializes in design/build/warranty landslide repair, rockfall mitigation, excavation shoring, grouting, and GRS-IBS abutment construction. With over 4800 completed geohazard repairs in the last 19 years, our combined experience and nationwide emergency response capability are unmatched. GeoStabilization provides geohazard mitigation services across North America, Canada, and Australasia.

Peak Utility Services Group Operating Companies provide a full-suite of services for the recurring repair, replacement, maintenance, upgrade and installation of telecom, electric power, and natural gas infrastructure in the Pacific Northwest and Intermountain West regions, the Dallas-Fort Worth area, the Boston Metro area, and in parts of Florida. Peak is the parent company of Track Utilities, SiteWise, Kelly Cable of New Mexico, Riley Brothers, and Superior Pipeline Services (SPS); five industry-leading utility service contractors. The Peak companies play a key role in supporting our clients'​ expansion into new frontiers.

Kelley Trucking Inc. is a heavy civil contractor specializing in the construction of dams, airports, highways, development and reclamation of gravel pits, production water storage ponds, overlot grading, aggregate production, demolition, and hauling. We are licensed, insured, and bonded with a single project bonding capacity in excess of $50 million. For 45 years we have worked to structure our company with the sole purpose of providing our clients with excellence in earthmoving.

What is Flatiron? We’re more than a construction company. We are an organization of some 3,500 people with diverse backgrounds and varied expertise who share a singular focus on enhancing the well-being of people and communities. We bring together industry-leading engineers, highly skilled craft workers and other professionals to deliver innovative solutions to infrastructure challenges across the U.S. and Canada. Flatiron builds highways and bridges; aviation, rail and transit; dams and water treatment facilities; and underground projects that fuel local economies, improve safety and enhance efficiency. Flatiron engineers harness the art and science of structural design to create solutions that are as beautiful as they are functional. Our craft employees and on-site leaders bring vital experience to each project to turn vision into reality. And our project leaders collaborate with project owners to deliver solutions that meet challenging criteria—safely—while at the same time mitigating risk for all those involved. Beyond safely delivering outstanding projects, Flatiron people demonstrate a commitment to ongoing learning, sustainability, our clients and partners, and the communities where we live and work. We build careers. We hire and advance the best engineers, craft workers and other professionals in our industry. We transform infrastructure.

Formed in 1985, ARS Companies have provided construction services to Western US customers for over 30 years. Headquartered in Denver, Colorado ARS Companies operates under the values of Trust, Communication, Loyalty, Vision, and Accountability The ARS Companies is a privately held consortium consisting of six separately managed lines of business. These lines consist of Soil Stabilization, Asphalt Recycling Services, Structural Concrete Services, Railway Trans-loading, Land Development Services, and Sand & Gravel Services. All ARS lines of business maintain a safety program with a zero accident – zero incident goal. Creating a safe work environment for ARS workers and the public is priority one. The ARS Companies belongs to various local and national affiliations, among them, AGC – Associated General Contractors Association, CCA – Colorado Contractors Association, and CAPA – The Colorado Asphalt Producers Association.

What is Flatiron? We’re more than a construction company. We are an organization of some 3,500 people with diverse backgrounds and varied expertise who share a singular focus on enhancing the well-being of people and communities. We bring together industry-leading engineers, highly skilled craft workers and other professionals to deliver innovative solutions to infrastructure challenges across the U.S. and Canada. Flatiron builds highways and bridges; aviation, rail and transit; dams and water treatment facilities; and underground projects that fuel local economies, improve safety and enhance efficiency. Flatiron engineers harness the art and science of structural design to create solutions that are as beautiful as they are functional. Our craft employees and on-site leaders bring vital experience to each project to turn vision into reality. And our project leaders collaborate with project owners to deliver solutions that meet challenging criteria—safely—while at the same time mitigating risk for all those involved. Beyond safely delivering outstanding projects, Flatiron people demonstrate a commitment to ongoing learning, sustainability, our clients and partners, and the communities where we live and work. We build careers. We hire and advance the best engineers, craft workers and other professionals in our industry. We transform infrastructure.

Based out of Evergreen, Colorado, ESCO Construction Company is a fourth-generation, family owned and operated business. We specialize in Earthworks, Underground Utilities, Concrete, and Equipment & Mechanics. As a growing company, ESCO has assembled an impressive team of highly capable employees that has helped us extend our capabilities and coverage across the Front Range.

EDGE Contracting, Inc., a General Contractor located in Golden, CO specializing in Excavation, Demolition, Infrastructure, Concrete and Site Development. EDGE Contracting is committed to providing our customers with high quality and professional service. We obtain these high standards with clear and concise communication. EDGE Contracting provides cost effective solutions for Owners, Architects, Engineers, and General Contractors across the state of Colorado.

Since 1989, BDI has been the premier provider of bridge and building diagnostic stress and vibration testing, structural monitoring, and nondestructive evaluation services around the world. We have achieved this status by relying on the professional experience and constant advancement of our employees with expertise that ranges from civil/structural engineering, data analysis, electrical engineering, instrument development, and safety. We also design and manufacture high-quality data acquisition systems and sensors for quantifying structural, geotechnical, and environmental parameters. Our unique combination of data management and instrument development ensures our deliverables are second to none for providing accurate information for engineers to make reliable infrastructure decisions. With more than a thousand successful bridge and building stress and vibration testing projects to our credit, our long list of satisfied clients includes state and municipal governments, public and private utilities, A/E firms, and private contractors. You’ll find us responsive, knowledgeable, and cost-effective. Please contact us with any questions!

Gracon LLC provides contracting services for challenging Hydro-Electric and Dam Refurbishment Construction Projects for corporations and government agencies. By combining the highest level of construction expertise with a deep dedication to safety and quality, Gracon LLC has earned a reputation as a go-to contractor for complicated construction projects including Hydro-Electric Construction and Dam Equipment Replacement and Rehabilitation. Gracon engages in a broad spectrum of construction projects and collaborates to achieve the goals of a diverse client base. We empower our teams to use their extensive experience and best practices to help our clients succeed.

Diamond Services Company specializes in excavation, pipeline construction, plant/facility construction and maintenance, aggregate hauling, roustabout services, and environmental services. Not every company needs all the services that we offer, but many of our customers do. They may also have projects that require a combination of our services being performed simultaneously to complete their project on schedule. That’s when Diamond Services Company provides value advantages in production efficiency, cost and quality control. Our consolidated services offer you a single, reliable source for handling the whole job, or to provide customized solutions for a specific application. One company that does it all means working relationships remain simple. Project control is enhanced. And a full range of capabilities is available to meet your needs, when and wherever needed. We’re multi-faceted, so you can make just one call to get it all. Diamond is Rock Solid Plain and simple, we have been in business since 1958 providing energy and civil services for our many customers. We have the longest tenure than any similar contractor in our multi-state geographical area. Diamond is Highest Quality With Diamond Services you get a team of senior specialists in every area we serve. They are not only administrators; they are on-site performers – managing quickly, decisively and responsively to meet your needs as they arise with whatever resources are required. We not only work smart, we add value with proven techniques and processes that address your deadline and budget parameters. Every project we handle also benefits from our on-staff Safety Director who oversees a proactive and comprehensive safety program. We believe in the maxim “safety pays.” That’s why we enforce, and invest in safety regulations, policies, and procedures. Our safety procedures include security measures, drug free programs, and regularly scheduled equipment inspections.