This light-station is on the summit and in the center of Muertos Island. The light is fixed white, varied by a white flash every three minutes, is of the third order, is 297 feet above high water, and is visible for 18 miles. It is shown from a cylindrical tower on the center of a one-story, flat-roofed dwelling, which is gray with white trimmings. The tower is 41 feet high from its base. The light was begun in 1882 and was finished in 1885 by the Spanish, at a cost of 39,412 pesos, and it is used as a guide along the southerly coast of Porto Rico. The lamp and clockwork of the lens were repaired, a new cover was fitted to the cistern, the windows were repaired, the walk around the building and exterior and interior walls were cemented and the lens clock was repaired.
In 1902, the Lighthouse Board built new boat ways and a boat landing for the station, erected boundary posts around the site, fitted new locks and bolts to all windows and doors, and installed a new Hear air pressure lamp. The lighthouse was located about three-quarters of a mile from the landing and was reached via a “steep, winding, rocky, and difficult trail.”
The I-shaped Muertos Island Lighthouse is unique amongst the lighthouses of Puerto Rico. The main entrance is located in the middle of the vertical portion of the I, which runs east-west, and opens into a small corridor across from which is located the entrance to the base of the tower. Positioned on the opposite side of the tower is an oil room, while to the right of the tower as one enters the lighthouse is an engineer’s room and to the left of the tower a supply room. In the top and bottom portions of the I, which run north-south, are found two keeper’s apartments, each consisting of a living room, two bedrooms, a kitchen/dining room, and a bathroom.
A spiral stairway leads up the cylindrical tower to a lantern room in which was housed a third-order Fresnel, equipped with three flash panels and manufactured in France by Sautter, Lemonnier, & Cie. A clockwork mechanism, powered by a weight suspended in the central column of the stairway, revolved the lens to produce a distinctive flash pattern.
On August 11, the eye of the 1915 Galveston Hurricane, one of the costliest hurricanes to strike the United States, passed just south of Puerto Rico. Jose Medrano was serving as assistant keeper of the lighthouse at the time, and when he realized the station’s launch would be lost if not taken to a place of safety, he hastily made a nine-mile trip to Ponce Harbor and beached the boat.
During the earthquake that struck the northwest coast of Puerto Rico in 1918, Keeper Bermudez noted that roughly an hour after the earthquake struck, the sea receded and then returned at Coffin Island, covering about 15 meters of beach above the normal shoreline. This surge was much less than that which caused significant damage at Point Borinquen Lighthouse.
On June 13, 1922, an unconscious man was brought to the lighthouse suffering from a serious wound in his arm. Keeper Bermudez rendered first-aid treatment and later reported the matter to his superiors: “At 5 p.m. on this date a man by the name of Juan Cruz was brought to the station, being unconscious. He had a 3 1/2-inch wound in his left forearm so deep that it cut through tendons, veins, and tissues, causing a great hemorrhage. The undersigned furnished him first aid, it being necessary to stitch up the wound in order to stop bleeding, and take him immediately to Ponce, where he could have medical attention.”
On December 10, 1924, Keeper Bermudez rendered assistance to the occupants of a disabled fishing boat that was discovered near the station.
Finally, in 1926, the Lighthouse Service Bulletin noted that during the tropical hurricane that struck Puerto Rico on July 22 of that year Keeper Bermudez “sheltered 7 persons from the shipwrecked fishing boat Pluma del Mar and also took in 20 persons, including 12 children, living near the station in houses unroofed by the storm.”
When Keeper Bermudez was not assistant those in need, he was must have been diligently maintaining the station as he was awarded the efficiency flag for having the model station in the district for 1917, 1924, and 1926. Bermudez was in charge of the lighthouse for roughly twenty years.
In 1945, a 500mm lens was placed in the lantern room of the Coffin Island Lighthouse, the light was automated, and the structure boarded up.