Waterford, CT
This dam is at the site of an old grist mill which operated in Jordan Village from 1731 until it was destroyed by fire in 1905. Some structural elements of that mill remain. A modern woolen mill was built on the site in 1920 and is well preserved and used for specialty manufacturing today. The bridge connects the old mill site across Jordan Falls, where Jordan Creek enters into Jordan Cove, to a small park. Unfortunately the bridge is closed and unsafe to cross. I couldn't find another entrance to the park. A very similar bridge is pictured below.
North Stonington, CT
This bridge was built in 2007 and crosses the Shunock River and is in much better shape than the bridge in the first picture. The dam forms Hewitt Pond, also known as Hewitt Flyfishing Pond or Gallup Pond. It's a popular fishing spot. The bridge was made possible by the Thames River Chapter of Trout Unlimited.