It was noted in 1891 that the dwelling house at the station was “altogether too small for the needs of the engineer” and that additional accommodation for coal was also required. After plans and specifications for the necessary additions were prepared, tenders were invited. The bids received, however, were considered excessive so the work was instead carried out in 1892 under the supervision of David Ross, carpenter of the Dominion steamer Landsdowne. Keeper Dinsmore added a ten-foot-long and seven-foot-wide porch to the dwelling in 1894, and David Ross returned to the island that year to build two reservoirs for the steam engine and install a new coal derrick.
Due to acid in the water, the tubes in the fog alarm’s boiler used to heat the water to create high-pressure steam had to be replaced about every four months. A second boiler, made by Messrs. Carrier, Laine, & Co. at a cost of $1,386, joined the old boiler at the station in June of 1896. A two-story addition, containing five rooms, was attached to the keeper’s dwelling that same year at a cost of $400. A new steam boiler was substituted for the old one in 1905.
The station was automated in 1984, and in 2008, the fog alarm building was demolished, leaving the square tower standing by itself. Some time in 2015 or 2016, the lantern room was removed from the old tower, and a skeletal tower was erected nearby to display a modern flashing light. The lantern room from Great Duck Island can now be seen on the grounds near Swallowtail Lighthouse.
Kelly Anne Loughery, founding president of the New Brunswick Lighthouse Society, had the opportunity to visit the island. "To date," she said, "this has been my most uninspiring, inhospitable lighthouse visit. The lighthouse is located on a flat barren island infested by muskrats. Every step is either in one of their holes or something even less appealing, and the inside of the lighthouse was laden with mold. I couldn’t wait to leave. I can’t imagine being a lightkeeper there."
Keepers: Samuel G. Dinsmore (1886 – 1906), Rupert Burnham (1906 – 1914), Manfred L. Daggett (1915 - 1916), Chick S. Stanley (1917 – 1922) Clayton E. Small (1922 – at least 1937), Jack Russell (at least 1974 - 1984).