New swimming docks opened on the Connecticut River July 2, just north of the Ledyard Bridge. Only students with their Dartmouth ID cards can swim there, and hours are limited from noon to 7 p.m. The $200,000 dock project includes the hiring of more lifeguards and new safety features, including sensors to monitor the current. Construction of handrails and aesthetic elements continues. The old docks have been closed since last summer, when College officials cited safety concerns and banned swimming.