Gilman, also known as Centennial Mill Dam, is a privately owned concrete gravity dam located in Dalton, New Hampshire. Built in 1898, this historic structure stands at a height of 38.3 feet with a length of 319 feet, serving primarily for hydroelectric purposes on the Connecticut River. The dam has a storage capacity of 705 acre-feet and a maximum discharge rate of 3538 cubic feet per second.

Managed by the Federal Energy Regulatory Commission (FERC), Gilman is subject to regular state inspections and enforcement to ensure its safety and compliance. Despite a low hazard potential, the dam poses a very high risk due to its age and structural condition assessment being unavailable. Emergency action plans are in place, with a last revision date in January 2018, although detailed risk management measures are not specified in the data. In the event of an emergency, contact information and inundation maps are crucial for effective response and mitigation efforts. Water resource and climate enthusiasts will find Gilman to be a fascinating piece of infrastructure with a rich history and complex risk profile in the realm of dam safety and management.