For nearly 70 years, the isolated atoll was under the control of the U.S. military. During that time, it was variously used as a naval refueling depot, an airbase, a testing site for nuclear and biological weapons, a secret missile base, and a site for the storage and disposal of chemical weapons and Agent Orange. Those activities left the area environmentally contaminated, and monitoring continues.
Atoll 2.8.1 50
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With the exception of USFWS activity, Johnston Atoll is a deserted 1,300-hectare (3,200-acre) atoll in the North Pacific Ocean, located about 750 nautical miles (1,390 km; 860 mi) southwest of the island of Hawaiʻi, and is grouped as one of the United States Minor Outlying Islands.[2] The atoll, which is located on a coral reef platform, has four islands. Johnston Island and Sand Island are both enlarged natural features, while Akau (North) and Hikina (East) are two artificial islands formed by coral dredging.[2] By 1964, dredge and fill operations had increased the size of Johnston Island to 596 acres (241 ha) from its original 46 acres (19 ha), increased the size of Sand Island from 10 to 22 acres (4.0 to 8.9 ha), and added the two new islands, North and East, of 25 and 18 acres (10.1 and 7.3 ha) respectively.[3]
The four islands compose a total land area of 2.67 square kilometers (1.03 square miles).[2] Due to the atoll's tilt, much of the reef on the southeast portion has subsided. But even though it does not have an encircling reef crest, the reef crest on the northwest portion of the atoll does provide for a shallow lagoon, with depths ranging from 3 to 10 m (10 to 33 ft).
About 300 species of fish have been recorded from the reefs and inshore waters of the atoll. It is also visited by green turtles and Hawaiian monk seals. The possibility of humpback whales using the waters as a breeding ground has been suggested, albeit in small numbers and with irregular occurrences so far.[6] Many other cetaceans possibly migrate through the area, but the species being most notably confirmed is Cuvier's beaked whales.[7]
Seabird species recorded as breeding on the atoll include Bulwer's petrel, wedge-tailed shearwater, Christmas shearwater, white-tailed tropicbird, red-tailed tropicbird, brown booby, red-footed booby, masked booby, great frigatebird, spectacled tern, sooty tern, brown noddy, black noddy, and white tern. It is the world's largest colony of red-tailed tropicbirds, with 10,800 nests in 2020.[8] It is visited by migratory shorebirds, including the Pacific golden plover, wandering tattler, bristle-thighed curlew, ruddy turnstone and sanderling.[9] The island, with its surrounding marine waters, has been recognised as an Important Bird Area by BirdLife International for its seabird colonies.[10]
In 1856, the United States enacted the Guano Islands Act, which allowed citizens of the United States to take possession of islands containing guano deposits. Under this act, William Parker and R. F. Ryan chartered the schooner Palestine specifically to find Johnston Atoll. They located guano on the atoll in March 1858 and proceeded to claim the island as U.S. territory.[15] In June of the same year, S. C. Allen, sailing on the Kalama under a commission from King Kamehameha IV of Hawaiʻi, landed on Johnston Atoll, removed the American flag, and claimed the atoll for the Kingdom of Hawaii. Allen named the atoll "Kalama" and the nearby smaller island "Cornwallis."[16][17]
Returning on July 27, 1858, the captain of the Palestine again hoisted the American flag and tried to acquire the island in the name of the United States. The same day, the "derelict and abandoned" atoll was declared part of the domain of Kamehameha IV.[17] On its July visit, however, the Palestine left two crew members on the island to gather phosphate. Later that year, Kamehameha revoked the lease granted to Allen when he learned the atoll had been claimed previously by the United States.[15] However, this did not prevent the Hawaiian Territory from making use of the atoll or asserting ownership.
On June 29, 1926, by Executive Order 4467, President Calvin Coolidge established Johnston Island Reservation as a federal bird refuge and placed it under the control of the U.S. Department of Agriculture, as a "refuge and breeding ground for native birds."[19] Johnston Atoll was added to the United States National Wildlife Refuge system in 1926, and renamed the Johnston Island National Wildlife Refuge in 1940.[20] The Johnston Atoll National Wildlife Refuge was established to protect the tropical ecosystem and the wildlife that it harbors.[21]However, the Department of Agriculture had no ships, and the United States Navy was interested in the atoll for strategic reasons, so with Executive Order 6935 on December 29, 1934, President Franklin D. Roosevelt placed the islands under the "control and jurisdiction of the Secretary of the Navy for administrative purposes", but subject to use as a refuge and breeding ground for native birds, under the United States Department of the Interior.
On February 14, 1941, President Franklin Roosevelt issued Executive Order 8682 to create naval defense areas in the central Pacific territories. The proclamation established "Johnston Island Naval Defensive Sea Area" which encompassed the territorial waters between the extreme high-water marks and the three-mile marine boundaries surrounding the atoll. "Johnston Island Naval Airspace Reservation" was also established to restrict access to the airspace over the naval defense sea area. Only U.S. government ships and aircraft were permitted to enter the naval defense areas at Johnston unless authorized by the Secretary of the Navy.
In 1935, personnel from the US Navy's Patrol Wing Two carried out some minor construction to develop the atoll for seaplane operation. In 1936, the Navy began the first of many changes to enlarge the atoll's land area. They erected some buildings and a boat landing on Sand Island and blasted coral to clear a 3,600 feet (1,100 m) seaplane landing.[30] Several seaplanes made flights from Hawaii to Johnston, such as that of a squadron of six aircraft in November, 1935.
By September 1941, construction of an airfield on Johnston Island commenced. A 4,000-foot (1,200 m) by 500-foot (150 m) runway was built together with two 400-man barracks, two mess halls, a cold-storage building, an underground hospital, a fresh-water plant, shop buildings, and fuel storage. The runway was complete by December 7, 1941, though in December 1943 the 99th Naval Construction Battalion arrived at the atoll and proceeded to lengthen the runway to 6,000 feet (1,800 m).[30] The runway was subsequently lengthened and improved as the island was enlarged.
During World War II Johnston Atoll was used as a refueling base for submarines, and also as an aircraft refueling stop for American bombers transiting the Pacific Ocean, including the Boeing B-29 Enola Gay.[33] By 1944, the atoll was one of the busiest air transport terminals in the Pacific. Air Transport Command aeromedical evacuation planes stopped at Johnston en route to Hawaii. Following V-J Day on August 14, 1945, Johnston Atoll saw the flow of men and aircraft that had been coming from the mainland into the Pacific turn around. By 1947, over 1,300 B-29 and B-24 bombers had passed through the Marianas, Kwajalein, Johnston Island, and Oahu en route to Mather Field and civilian life.
The LORAN-C station was disestablished on July 1, 1992, and all Coast Guard personnel, electronic equipment, and property departed the atoll that month. Buildings on Sand Island were transferred to other activities. LORAN whip antennas on Johnston and Sand Islands were removed, and the 625-foot LORAN tower and antenna were demolished on December 3, 1992. The LORAN A and C station and buildings on Sand Island were then dismantled and removed.[36][37]
"Starfish", a high altitude Thor launched nuclear test scheduled for June 20, 1962, was the first to contaminate the atoll. The rocket with the 1.45-megaton Starfish device (W49 warhead and the MK-4 re-entry vehicle) on its nose was launched that evening, but the Thor missile engine cut out only 59 seconds after launch. The range safety officer sent a destruct signal 65 seconds after launch, and the missile was destroyed at approximately 10.6 kilometers (6.6 miles) altitude. The warhead high explosive detonated in 1-point safe fashion, destroying the warhead without producing nuclear yield. Large pieces of the plutonium contaminated missile, including pieces of the warhead, booster rocket, engine, re-entry vehicle and missile parts, fell back on Johnston Island. More wreckage along with plutonium contamination was found on nearby Sand Island.
The atoll was subject to large-scale bioweapons testing over four years starting in 1965. The American strategic tests of bioweapons were as expensive and elaborate as the tests of the first hydrogen bombs at Eniwetok Atoll. They involved enough ships to have made the world's fifth-largest independent navy. One experiment involved a number of barges loaded with hundreds of rhesus monkeys. It is estimated that one jet with bioweapon spray "would probably be more efficient at causing human deaths than a ten-megaton hydrogen bomb."[51]
Over the years, leaks of Agent Orange as well as chemical weapon leaks in the weapon storage area occurred where caustic chemicals such as sodium hydroxide were used to mitigate toxic agents during cleanup. Larger spills of nerve and mustard agent within the MCD at JACADS also took place. Small releases of chemical weapon components from JACADS were cited by the EPA. Multiple studies of the Johnston Atoll environment and ecology have been conducted and the atoll is likely the most studied island in the Pacific.[22]
Studies at the atoll on the impact of PCB contamination in reef damselfish (Abudefduf sordidus) demonstrated that embryonic abnormalities could be used as a metric for comparing contaminated and uncontaminated areas.[67] Some PCB contamination in the lagoon was traced to Coast Guard disposal practices of PCB-laden electrical transformers. 2ff7e9595c
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