PhoenixGeolocation: 33.3813, -111.9409

Terracon's Phoenix office has provided geotechnical, environmental, construction materials engineering/ testing and facilities services since 1995 and maintains a diversified staff of qualified and experienced engineers, geologists, environmental scientists, special inspectors, materials technicians and facilities professionals. The office has played an integral role in the successful completion of a wide variety of public and private projects throughout Arizona and the southwest.  Since beginning service in Arizona, Terracon has completed over 25,000 projects, comprised of over 8,500 environmental projects; over 8,000 geotechnical engineering projects; and, over 8,500 materials engineering projects. Since 2000, the office has completed over 1,600 facilities related projects.  The office has also been involved in numerous large state transportation and transit projects, including Arizona's first design-build transportation project. Additionally, Terracon has provided services for a variety of power transmission & generation, industrial, commercial office, medical, multifamily residential, mixed use facilities and major public works projects.

  • Environmental Services
    • Phase I & II Site Assessments
    • Asbestos / Lead Paint Consulting
    • Industrial Hygiene
    • Brownfields
    • NEPA / Natural & Cultural Resources
    • Regulatory Compliance
    • Investigation / Risk Based Corrective Action
  • Facilities Services
    • Property/ Facility Condition Assessments
    • Roofing Consulting & Building Enclosure Consulting
    • MEP Consulting
    • Building Energy Performance Assessments
    • Engineering Diagnostics
    • ADA Code Compliance Assessments
    • Seismic Risk Assessments
  • Geotechnical Services
    • Earth Structures, Slope & Retention System Design
    • Pavement Management, Evaluation and Design
    • Soil Stabilization and Ground Improvement
    • Foundation Analysis and Design
    • Geotechnical Design for Aggregate Pit Reclamation
    • In-situ Testing and Performance Monitoring
    • Aggregate Resource Evaluations
  • Materials Services
    • On-site Observation and Monitoring
    • Construction Quality Control and Quality Assurance
    • Design and Review of Concrete, Grout, Asphaltic Concrete and Slurry Mixes
    • Special Inspections
    • AASHTO, CCRL ADOT, USACE Validated Laboratory
    • Annual C33 Aggregate Certification Testing
    • Structural Steel Non-destructive Testing

4685 S. Ash Ave., Suite H-4
Tempe, AZ 85282

Phone: (480) 897 8200
Fax: (480) 897 1133




Brent Borchers, Office Manager
Chuck Reynolds, Sr. Client Development Manager

Key Projects

Central Mesa Light Rail ExtensionGeolocation: 0, 0
ValleyMetro used a design-build procurement to complete the Central Mesa Extension.  Terracon, as a subconsultant to the lead designer Parsons Transportation Group, was team member of Valley Transit Constructors (VTC) a Kiewit/Mass. Electric joint venture who completed the $200 million design build project.  The 3.1-mile, million Central Mesa light rail extension extended previously constructed dual tracks from near Sycamore to east of Mesa Drive.  The new tracks were constructed along the center of Main Street; additionally, four stations were built along this portion of the…

Davis Dam-Kingman 69 kV Transmission LineGeolocation: 35.2143, -113.7633
Western Area Power Administration (Western) reconstructed the 69-kV Davis Dam to Kingman TAP transmission line. The new line, constructed with a combination of steel and concrete structures, will replace an existing wood supported line that was constructed in 1947. The new transmission line is approximately 27.3 miles in length and extends from the substation at Davis Dam located on the Colorado River on the west end, through Golden Valley, and terminates at the Mohave Electric Corporation's Kingman, Arizona TAP. Terracon overcame significant challenges to complete the geotechnical…

Former Metal Plating Facility Site Characterization and RemediationGeolocation: 34.15, -114.2891

The Arizona Department of Environmental Quality (ADEQ) issued a Notice of Violation (NOV) to the business owner and operator of a metal plating facility in 2007. The property owner selected Terracon to perform site characterization activities around the facility and in the warehouse where the former plating line pit was located. The lateral and vertical extent of hexavalent chromium, used in the plating process, produced the contamination in the soil which was defined by Terracon's environmental group. Terracon then developed a remedial action plan.

During the project, Terracon…

M&I Bank DevelopmentGeolocation: 33.5992, -111.9833
Terracon has provided single-source environmental, geotechnical, and construction materials engineering and testing/inspection services associated with M&I Bank's development of multiple retail branches in metropolitan Phoenix since 2004. Terracon has performed phase I environmental site assessments for undeveloped tracts of land associated with new M&I Bank retail sites. Terracon has provided geotechnical engineering reports of M&I Bank sites for use by other engineering consultants and contractors in the design and construction of foundations, slabs, and pavements. Terracon…

Spring Training Facility for Arizona Diamondbacks & Colorado Rockies, Salt River Pima-Maricopa Indian Community (SRPMIC)Geolocation: 33.4942, -111.9261

Terracon's Phoenix office has been involved in both the geotechnical and construction materials and engineering testing services for the Arizona Diamondbacks/Colorado Rockies Spring Training Facility. Terracon's services on the $120+ million facility were provided as part of an SRPMIC on-call contract awarded in 2009. Terracon was an active participant in the design meetings, which allowed us the opportunity to provide extensive construction-related input during the design stage that resulted in the creation of a unique foundation system. Prior to final design of the project, Terracon…

Tempe Gateway, and Hayden Ferry Lakes I and II CommercialGeolocation: 0, 0
Terracon provided energy and indoor environmental consulting to assist in obtaining the U.S. Green Buildings Council (USGBC), Leadership in Energy and Environmental Design (LEED®) for Existing Buildings Operation and Maintenance (EBOM) certification for three commercial buildings in Tempe, Arizona.  The project included two eight-story and one twelve-story commercial office buildings with multiple heating, ventilating, and air-conditioning (HVAC) systems.  The client wished to obtain LEED EBOM Environmental Quality (EQ) Pre-requisite 1 (P1), Building Ventilation, and EQ Credit 1.1 (EQ…

Tombstone City HallGeolocation: 0, 0
With the help of a Community Block Development Grant, the City of Tombstone is undertaking a historic restoration and preservation of the historic Tombstone City Hall. The “Old City Hall” had been in continuous service for Mayors, Marshals, and official city offices from 1882 until 2009, when it fell into disrepair and was vacated.  Following renovations and reconditioning, the building will provide new space for the Marshal’s office and additional meeting space for the community.  Terracon conducted a Phase I ESA and a Hazardous Materials Survey under contract with the ADEQ…

US Highway 89 at Milepost 526, Bitter Springs Landslide RepairGeolocation: 0, 0
As part of the FNF Construction Inc. CMAR team, Terracon provided preconstruction and construction phase engineering and construction materials testing and engineering services for this Arizona Department of Transportation (ADOT) project. Terracon’s preconstruction phase geotechnical engineering services on the project included three-dimensional stability modeling of the planned construction work; monitoring of a test blast program within the limits of the project; and development and evaluation of a test fill program for the planned construction.  Terracon’s geotechnical engineers…

Vela Luxury ApartmentsGeolocation: 0, 0
Terracon provided a full range of development services for this multi-family residential site located on the north bank of the Tempe Town Lake including environmental, geotechnical engineering, materials testing, and facilities management services.  The project included demolition of an existing residential development and construction of (1) a three-story townhome building housing 36 units, and (1) a five story building housing 254 units with an attached parking garage. Amenities include the leasing office, bike storage areas, two commercial tenant spaces, three live/ work spaces,…