Semi Crash Spills Oil and Fuel – BT Squared Responds


On Monday morning, January 17, 2011, the Wisconsin Department of Natural Resources (WDNR) requested BT Squared‘s assistance in responding to a spill in Mirror Lake under the Emergency Response Zone Contract that BT Squared recently signed with WDNR. A westbound semi truck on I-90 had left the highway and plunged down the bluff between the eastbound and westbound highway bridges across Mirror Lake near Lake Delton, Wisconsin. The truck cab was partially submerged in the lake while most of the trailer remained suspended part way up the bluff in the bridge support structure.  Despite continuing snowfall and poor road conditions, the BT Squared spill response team arrived at the site with 2.5 hours of the initial call with the WDNR warden at the scene.

The only access to the spill site was across the frozen surface of Mirror Lake from the boat ramp at the state park, ¾ mile away. The BT Squared initial response crew reached the site with an off-road utility vehicle. They used oil-absorbing booms and pads to clean up spilled diesel fuel and motor oil from the truck on the ice, and from the open water around the cab. The crew then constructed a bridge to the truck cab using a ladder so that the remaining fuel could be pumped into drums. After the truck was finally pulled from the ice, around 10 p.m., the crew worked until nearly 1 a.m. to pick up as much floating oil as possible from the open hole in the ice.

BT Squared and WDNR are working together to monitor the ice conditions, and are continuing to use sorbents to ensure that residual fuel and oil frozen in the ice will be captured as the ice melts. As of February 3, 2011, BT squared had recovered over 70 gallons of fuel from the truck and five 55-gallon drums full of oil sorbent materials.

Click here tp read the Wisconsin Dells Events article "Crash kills one, damages bridge" at