Salt River Project Mechanical Installation Coronado Emissions Control Project
Location:St. Johns, Arizona
Design Consultants:Architect/Engineer-Sargent & Lundy LLC
- Sundt self-performed 85% of the work, including all of the structural steel (2,300 tons) and exterior siding
- The project team participated in a number of community projects
Sundt is performing a number of upgrades at SRP’s Coronado Generating Station near St. John’s, Ariz., to enable the 773-megawatt, coal-fired power plant to reduce emissions of Sulfur Dioxide, allowing the facility to comply with a consent decree agreement between the Salt River Project and the Environmental Protection Agency. This is the third project awarded to Sundt by the SRP, which is a major supplier of electricity to Arizona homes and businesses. Sundt’s current contract is for the mechanical phase of the upgrade work on both of the plant’s generating units, which have been in operation since the early 1980s. This includes two, 130-foot-high, 85,000-square-foot absorber buildings, plus fabrication and installation of over 1,600 tons of flue gas duct. Sundt will also install four 16,100-horsepower induced draft fans, 2,000 lineal feet of pipe rack structure, 51,000 lineal feet of piping, and perform associated demolition work. Sundt’s own crews are performing the project’s concrete work, piping, structural steel, flue gas duct fabrication/installation and equipment setting. Unit 1’s construction activities will be completed in August 2011. After that comes the critical aspect: bringing the new equipment on-line without disrupting the plant’s ability to supply power to its customers. Coronado Generating Station runs 24 hours a day, seven days a week. Maintenance and upgrades are performed during planned outages, which are scheduled in the spring when the demand for energy is lowest and can be met with just one unit.
A new environmental controls project at the Salt River Project’s Coronado Generating Station to reduce emissions of sulfur dioxide, nitrogen oxide and mercury. The project consisted of installation of 51,000 ft of piping, 1,600 tons of flue gas duct, four induced draft fans, structural steel and two absorber buildings. This scope of work included two tie-ins completed during 28 day outages.