June 19, 2013
Quarry Park and Nature Preserve presented a demonstration of its 100-year-old Liberty Derrick at the summer festival in Waite Park, Minnesota, on Saturday.
The derrick, which is similar to those used at granite quarries in the early- to mid-1900s, hoisted a 4-ton block of granite for the demonstration.
According to WJON, the Stearns County Parks Department acquired the derrick in 1996 and fully restored it in 2008. It remains on display at Quarry Park year-round, and the park puts the Liberty Derrick in operation once each year.
Watch the video below to see the Liberty Derrick demonstration.
[youtube h6Pb0l8cJvU nolink]