Tetra Tech integrated our well-established environmental consulting and permitting practice with our in-house engineering and wind construction services to provide a full-service team to Competitive Power Ventures for the Keenan II Wind Energy Project. Even with significant logistical challenges, such as a lack of Internet and phone access at the remote project site, we completed the project on time and on budget.

This approximately 152-megawatt project in Woodward County in northwest Oklahoma includes 66 Siemens SWT 2.3-megawatt wind turbine generators.

Tetra Tech effectively designed project layout to reduce environmental and community impacts, while providing significant construction cost savings to Competitive Power Ventures.

We performed a detailed critical issues analysis of the proposed project site and completed a number of additional environmental studies, including the following:

  • Bat and whooping crane risk assessment
  • Lesser prairie-chicken lek survey
  • Cultural resource file review
  • Unanticipated discoveries plan for historical remains
  • Phase I environmental site assessments
  • Numerous geographic information system and mapping efforts
  • Wetlands investigation and delineation in conjunction with design of the final project layout

Tetra Tech was subsequently awarded the $40 million engineering, procurement, and construction contract. We completed over 300,000 hours of work without a lost time or recordable incident.

Tetra Tech managed eight months of construction, including:

  • 66 wind turbine generator foundations
  • 69,000 linear feet of access roads and 1.5 miles of county road upgrades
  • 147,000 linear feet of 34.5-kilovolt underground collection system
  • 138-kilovolt overhead transmission line
  • Two 80-meter meteorological masts
  • Operations and Maintenance (O&M) building and support structures, such as parking, storm shelter, shop, and office facilities.
  • Development of the storm water pollution prevention plan