A little late, but I am passing this little tidbit of Coast Guard history along from BRYMAR consulting.
Lighthouse Act – 7 August 1789
The Lighthouse Act was the ninth statute adopted by the First Congress of the United States. It provided for the voluntary cession by the various states of all lighthouses, beacons, buoys, and public piers to the federal government and tasked the Secretary of the Treasury with building and maintaining the aids to maritime navigation. The Lighthouse Establishment (later named the United States Light House Service) is the oldest of the various components of the present-day United States Coast Guard, joining in 1939.