COVID-19 WHO WE ARE EXPERTISE CURRENT PAGE: PROJECTS CORPORATE RESPONSIBILITY SAFETY & QUALITY CAREERS CONTACT Winchell Lake Compressor Station INDUSTRIAL PROJECT The Winchell Lake Compressor Station Unit Addition involved the installation of a single 30 MW turbo-compressor package (gas turbine and compressor) and tie-into existing NPS 48, yard piping. Construction included installations of Auxiliary Power Unit, Primary Power Unit, Mechanical Building containing a glycol heating boiler system, Instrument Air Building, Electrical Building – Motor Control System and Uninterruptible Power System, Yard Piping, Utilities and Control Buildings including Emergency Shutdown System (ESD) and Programmable Logic Control (PLC). The project, in South Western Alberta, was safely and successfully delivered on time and on budget from Q3-2018 to Q4-2019. Scope of this project Structural & Piping fabrication, Civil, Structural, Mechanical, Electrical, & Instrumentation, Coating, Insulation 30 MW, Siemens Compressor / Turbine Implementation of wire welding (follow the link to video) Up to 440-ton Track cranes, rock trucks, up to 450 Hoes (including long sticks) FACILITIES CONSTRUCTION Previous Turner Valley Compressor Station MASTEC CANADA 333 7 Avenue Southwest, Calgary, AB, T2P 2Z1, Canada WHO WE ARE About Us Core Values Leadership CAREERS Join Our Team Current Project Opportunities EXPERTISE Industrial Construction Power & Renewables Pipeline Construction Oil & Gas Services Civil & Concrete Coatings Electrical & Instrumentation HDD CORPORATE RESPONSIBILITY Indigenous Relations Community Engagement SAFETY & QUALITY Safety Culture Quality Certifications & Awards OTHER HSE Reporting Hotline Confidential Reporting ORIENTATION & SELF ASSESSMENT QUESTIONNAIRE COPYRIGHT ⓒ MASTEC CANADA

COVID-19 WHO WE ARE EXPERTISE CURRENT PAGE: PROJECTS CORPORATE RESPONSIBILITY SAFETY & QUALITY CAREERS CONTACT PROJECT EXAMPLES MASTEC CANADA 333 7 Avenue Southwest, Calgary, AB, T2P 2Z1, Canada WHO WE ARE About Us Core Values Leadership CAREERS Join Our Team Current Project Opportunities EXPERTISE Industrial Construction Power & Renewables Pipeline Construction Oil & Gas Services Civil & Concrete Coatings Electrical & Instrumentation HDD CORPORATE RESPONSIBILITY Indigenous Relations Community Engagement SAFETY & QUALITY Safety Culture Quality Certifications & Awards OTHER HSE Reporting Hotline Confidential Reporting ORIENTATION & SELF ASSESSMENT QUESTIONNAIRE COPYRIGHT ⓒ MASTEC CANADA