The family of a 14-year-old boy who drowned near the Port Chilkoot Dock has filed a wrongful death lawsuit against the Haines Borough, saying the municipality demonstrated gross negligence, including by not posting hazard signs at the popular swimming beach.

The suit filed May 23 in state Superior Court seeks in excess of $1 million. Andrew Williamson died while attempting to swim with two friends to the dock’s lightering float. The accident occurred May…