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CASE STUDY

SeaShield™ System Protects Historic Yellowstone Bridge

Subsea & Splash Zone Coatings

Project Data

LocationWyoming, USA
ProductsSeaShield 500™ System
DateMarch 2019

Project Details

The historic Fishing Bridge was built in 1937 in the heart of Yellowstone National Park, Wyoming. It was once an attraction for fishermen from all over the country due to the abundance of cutthroat trout. It is now one of the featured attractions for hundreds of thousands of Yellowstone Park tourists on an annual basis.

The structure is supported by 162 x 15″ timber piles that, over the years, were beginning to see deterioration from water line to mud line. The SeaShield 500™ System was selected as the system for the complete encapsulation of all 162 piles using 17″ dia. SeaShield FRP Jackets™  that yielded a minimum ½” annular space.

The jackets were constructed 3/16″ thick and in a special brown color to closely match the existing piles. The annulus was then pumped full with the SeaShield 550 Epoxy Grout™. The epoxy grout kits consisted of 3 gallons of 2-part epoxy and 2.5 x 50 lb. bags of Part C Aggregate yielding 1.2 cu ft per kit.

The epoxy grout, due to its outstanding flow characteristics, effectively filled all voids, cracks and checks in the piles. Finally, the tops of the jackets were sealed off using a special brown colour SeaShield SplashZone UW Epoxy™. In total the project comprised 1,440 LF of 17″ dia. SeaShield FRP Jackets and 575 kits of the SeaShield 550 Epoxy Grout. Installation took place during the late summer of 2018 and was completed 2 weeks ahead of schedule. The contractor was very pleased with the ease of installation of both the Fiber-Form Jackets and the 550 Epoxy Grout.

The SeaShield 500 System provides excellent compressive, flexural and tensile strength, as well as outstanding bond strength to the timber piles. The system also provides weathering protection, including outstanding abrasion and UV resistance to ensure a long service life for the Historic Yellowstone Fishing Bridge.