down a foundation for the lighthouse, and that more money was going to be needed to complete the project. In September 1879, a third survey was ordered, this time headed by John Trewavas, whose experience included the Wolf Rock lighthouse in England. Trewavas was overtaken by large swells and was swept into the sea while attempting a landing, and his body was never recovered. His replacement, Charles A. Ballantyne, had a difficult assignment recruiting workers due to the widespread negative reaction to Trewavas' death, and a general desire by the public to end the project. Ballantyne was eventually able to secure a group of quarrymen who knew nothing of the tragedy, and was able to resume work on the rock. Transportation to and from the rock involved the use of a derrick line attached with a breeches buoy, and in May 1880, they were able to completely blast the top of the rock to allow the construction of the lighthouse's foundation. The structure of the lighthouse included an attached keeper's quarters and a tower that originally housed a first-order Fresnel lens, with an incandescent oil vapor lamp, above sea level. The light had a visibility range of , and was fixed with a steam foghorn. It is located on less than an acre of basalt in the Pacific Ocean, south of the mouth of the Columbia River, approximately off Tillamook Head, and is the northernmost lighthouse along the Oregon coast. The construction lasted more than 500 days by the U.S. Army Corps of Engineers under the leadership of George Lewis Gillespie Jr. The cost of $125,000, at the time (equivalent to $ today), was the most expensive West Coast lighthouse ever built, later surpassed by the St. George Reef Light off the northern California coast. The wreck of the Lupatia In early January 1881, when the lighthouse was near completion, the barque Lupatia was sailing in thick fog and high winds when the ship's Captain noticed that they were too close to shore. Wheeler, the official in charge of the lighthouse's construction, heard the voices of the panicked crew and immediately ordered his men to place lanterns in the tower and light a bonfire to signal the ship that they were approximately from the rock. The ship appeared to have been able to turn itself toward returning to sea. However, it quickly disappeared into the fog, and Wheeler was not