Transforming demolition debris from the Dallas Fort Worth Connector project into usable building material not only saves the state money but has a positive environmental impact. NorthGate Constructors' concrete-crushing plant chews up 200 tons of debris per hour and has saved more than $2 million on the Connector, said Kristen Schropp, spokeswoman for NorthGate. Material has also been reused as road bed for other projects.