A post light, which employed a tubular-lantern light, was established at Bush Point by the Lighthouse Board on May 10, 1894.
While improvements were made at several of the points in the following years, Bush Point remained marked by just a post light. Over a decade after the grounding of the USS Colorado, the Bureau of Lighthouses requested $46,000 for the establishment of a light and fog signal station at or near Bush Point on Puget Sound, noting the following:
This is a low point, and the currents in the vicinity are strong and irregular. Several serious collisions have occurred between Bush Point and Point No Point through inbound and outbound vessels following the shore of Marrowstone Island during foggy weather on account of the echo which can be obtained from it. This aid was petitioned for by the Shipmasters’ Association of America during September, 1918, and was considered by that association as the second most important aid required for Puget Sound.
The Bureau repeated its request several times, until $10,000 was allotted in 1930 for an automatic acetylene light at Bush Point. The project was expected to be completed in 1931, but the twenty-foot, pyramidal tower, built of reinforced concrete, was not finished until 1933. Operated by commercial electric power, the semiautomatic light and fog signal were controlled from the residence of a caretaker. The total cost for the project was $6,197.
The light emitted from the lantern atop the square tower was on for five seconds and then off for five seconds, while the horn mounted on the tower sounded a five-second blast every thirty seconds when needed. The fog signal was discontinued in 1976, but the tower still exhibits a light to help mariners navigate through the narrow passage off Bush Point.