HOLLAND, MI (WHTC News) - Holland BPW officials say that a spill from the water treatment plant on West Second Street on Thursday afternoon was fully contained. Around 720 gallons of untreated sewage flowed out of a 12-inch hole in a 20-inch pipe. A contractor digging an electrical vault out of the ground apparently struck the pipe, causing the damage. It took about an hour to clean up the spilled liquid. State and county officials were notified. None of the sewage flowed out of the facility.