Environmental crews were out in boats Thursday scouring the Hudson River and cleaning up the mess from the demolition of a section of the Tappan Zee Bridge.

The demolition left behind quite a mess along the shoreline of a number of river towns in Westchester.

The controlled demolition Tuesday destroyed the east anchor span of the Tappan Zee Bridge, and more than 6,000 tons of steel and concrete crashed into the Hudson River below.

A few hours after a section of the old bridge imploded, Irvington resident Liam Hatch went for a walk in Matthiessen Park and was not happy with the debris along the river's edge.

"I was walking with my dog, and lined all along here was just debris such as wood, masks, gloves, empty bags of concrete, construction helmets, five-gallon buckets,” he says.

The debris apparently arrived at shore due to the bridge demolition.

According to the builders of the new bridge, chains were placed on the riverbed of the Hudson to capture the mounds of steel and concrete that fell into the river when the east anchor span of the Tappan Zee was demolished.

Village officials in Irvington say they are pleased with the quick cleanup work done by the bridge contractors. The river bank along Mathiessen Park is looking pristine once again.

Officials with the environmental group Riverkeeper say they are satisfied with the work done by contractors to clean up the debris left on the river after the Tappan Zee demolition.