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OUR services


There’s really only one way to get the job done right – provide you with exactly the personnel and expertise you need, no more and no less. We can supplement your staff to match the ebb and flow of construction activity so that you’re always operating at peak efficiency.


Near or far, populated or isolated – our surveying team will go where you need us and get the job done. We’ll overcome all logistical challenges and will always be available when you need our support.


Developing and maintaining reliable access to your facilities - whether generation, transmission, or recreation - is imperative. Our civil engineers solve your site design and access needs with a practical and cost effective approach.


From the design of large, heavily-used recreation facilities to simple landscape screening around substations, MacKay Sposito's landscape architects combine creativity with practicality. No matter the scale, you will get exactly what you need.


Permitting challenges can knock your project off-course. When it comes to navigating permitting and agency processes, we’ve charted the quickest routes to success. Your project will arrive on schedule and under budget.


a snapshot of oUR WORK

Pend Oreille County WA

Box Canyon Turbine Upgrades

Pend Oreille Public Utility District

Project Highlights:

  • Provided on-site project manager for upgrade of two hydroelectric turbine units
  • Installation of new four-blade runners
  • Replacement of control systems
  • Coordination with global suppliers

Goldendale WA

Big Eddy – Knight No. 1 500 kV Transmission Line

Bonneville Power Administration

Project Highlights:

  • Rebuild and replacement of 29 miles of double circuit 500kV transmission line
  • Erection of lattice steel towers
  • Installation of fiber optic cable
  • Construction of new access roads
  • Project included spanning of the Columbia River

Desert Aire WA

Priest Rapids Downstream Fish Passage

Grant County Public Utility District

Project Highlights:

  • New fish bypass for migrating salmon
  • Modification of three spillways for top spill fish passage
  • Modification to spillway gates and the spillway ogees and aprons
  • Underwater concrete for apron extension
  • Concrete piers extended

Desert Aire WA

Priest Rapids Recreation Area

Grant County Public Utility District

Project Highlights:

  • Expanded boat basin with 3-lane ramp and float
  • New jetty constructed
  • Expanded parking lot
  • ADA improvements
  • Extensive public involvement and outreach