 Just 21 days later, a sinkhole was discovered under the southbound bridge over the Bushkill Creek, and resulted in the demolition of the southbound bridge.Once the new northbound bridge was completed, another crossover was created, detouring southbound traffic onto the northbound side of the highway.On April 21, 2004, a depression formed under the new northbound bridge, and the highway was shut down once again to fill the area with bituminous material.