The Impulse is the major steel coaster located at Knoebel’s since 2004 when the Whirlwind closed. It has over 2,000 feet of track, a nearly 100-foot vertical hill and a 90-degree free fall drop.
The foundation of the Impulse consisted of 42-inch and 54-inch diameter permanently cased drilled shafts. Each of the permanent casings was galvanized for corrosion protection and seated into the bedrock which was a hard black shale. All of the projects’ 158 shafts were completed within a month using multiple drill rigs, working extended hours and weekends. The footprint of the coaster is located in less than one acre of space. The parking lots of the amusement park were used for storage of the permanent casings and construction of the reinforcing cages which were cut to length as the shafts were drilled.
Job Name: Impulse Coaster
Job Location: Elysburg, Pennsylvania
Job Type: Drilled Shafts
Start Date: November 2015
Completion Date: December 2015