Chatham is home to the Chatham Lighthouse, which was established by President Thomas Jefferson in 1808 to protect the ships circling the Cape. The 1808 towers were replaced in 1841 by twin brick towers that were eventually lost to erosion. The pair were rebuilt in 1877 out of cast iron across the street from its original location, where the light is today. The northern of the two was moved to Eastham to become the Nauset Light in 1923, when the northern tower was declared surplus. Today, the keeper's house is home to a Coast Guard station which patrols the waters of the Atlantic and Nantucket Sound from Wellfleet to West Yarmouth. The first reforesting project in America took place on Great Hill in 1821 when Selectmen had pine trees and beach grass planted to prevent erosion and to keep sand from blowing over the village.