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There’s 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.


Let us help you define boundaries, control construction, and measure deformation. Our team has been there before and we'll make sure you start off on the right footing.


MacKay Sposito's helps our clients meet their FERC commitments.  We design underground infrastructure, shoreline enhancements, and access improvements to ensure your facilities operate efficiently.  We assess access route alternatives, evaluate existing road conditions, design repairs, design new roads, and oversee construction of access roads. You will always have consistent and reliable access to your facilities.

Business Continuity

Your hydropower facilities must be resilient.  Our team can help you develop and test the Emergency Action Plans mandated by FERC or Continuity of Operations Plans (COOP) 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.



Dams, Turbines, & Powerhouses

Expertise and availability are scarce commodities in this industry. No matter where your facility is located or what your staffing needs, MacKay Sposito can mobilize a team of professionals and have them on site for as long as the project requires.

Spillways-lock gates-coatings

Spillways, Lock Gates, & Coatings

No matter how remote, constrained, or even treacherous the project site, we can provide you with a strong and steady presence to look after your interests. Our project managers will keep activities moving along while ensuring that all environmental, health and safety issues are being properly addressed.

Wind generation

Wind Generation

We can help to keep those turbines turning by creating and maintaining reliable access to windfarms. We'll ensure you have roadways that can handle heavy loads and don’t wash out during heavy rain events.


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

Grant County WA

Wanapum Monolith Stabilization

Grant County Public Utility District

Project Highlights:

  • Engineering News-Record Northwest’s Energy/Industrial Project of the Year in 2015
  • Quick response survey and inspection work for a spillway crack
  • Established survey control on the dam for use in measurements and drill hole layout

Spillway Gate Rehabilitation

Various Clients

Project Highlights:

  • 26 spillway gates completed
  • Served as the owner’s representative, overseeing the contractor’s work
  • Experience with coatings, welds, structural steel bolt-ups, trunnion repairs, rivets, environmental compliance, and safety

Dayton WA

Tucannon River Wind Farm

Portland General Electric

Project Highlights:

  • 116-turbine wind farm on 20,000 acres
  • 267 megawatts of total installed capacity
  • 234 miles of 34.5kV underground collection cable
  • 42 miles of access roads
  • 21.5 miles of 230kV transmission line