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OUR services

Construction management & inspection

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.

Land Surveying

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.

Civil Engineering

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

Landscape Architecture

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.

Business Continuity

Our team can help you develop and test the Emergency Action Plans mandated by FERC and, more importantly, implemented to ensure all stakeholders are prepared for every contingency.  We will guide your organization through a process that garners widespread stakeholder input and buy-in and that instills confidence in your management of critical facilities.


With a combination of pre-construction environmental permitting and construction inspection expertise, our staff is uniquely positioned to provide the most highly constructible projects while minimizing environmental impacts. Your project will be permitted and constructed right from the start.


Simplify your project delivery team and eliminate finger-pointing by leveraging our contracting subsidiary, MacKay Sposito Constructors, to combine our design services with construction.  By combining our design with construction services you’ll receive schedule and budget information much earlier, as well as accelerated delivery of the project.


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