When construction started on the 55-acre Esther Simplot Park near Whitewater Park Boulevard and the Boise River Park, no one expected to find what lay beneath the earth's surface: 70,000 yards of contaminated soil. Turns out the area used to be an industrial dumping site. Surprise! Construction crews found drums of petroleum, concrete, machinery—even a tractor. The city of Boise needed to allocate $4 million for the cost of the cleanup, with an additional $1.5 coming from the Simplot family. It took around 3,500 dump truck trips to get all the soil and junk moved to the Ada County Landfill.