U Thant Island

U Thant Island with Williamsburg Bridge in the background
Geography
Coordinates	40°44′48″N 73°57′52″W / 40.746599°N 73.964387°W / 40.746599; -73.964387
Administration
United States
State	New York
Borough	Manhattan

U Thant Island (officially Belmont Island) is a small artificial island or islet in the borough of Manhattan in New York City. The 100-by-200-foot (30 by 60 m) island, created during the construction of the Steinway Tunnel directly underneath, is the smallest island in Manhattan.^[1][2]

The tiny artificial island is 100 by 200 feet (30 by 60 m) in size and located in the East River, just south of Roosevelt Island.^[3][4] It lies midway between the United Nations Headquarters at 42nd Street, in Manhattan to the west, and Gantry Plaza State Park in Long Island City, within Queens to the east. It is legally part of Manhattan and is formally a part of Manhattan Community District 6, which also includes the neighborhoods of Turtle Bay and Murray Hill to the west of U Thant Island.^[5] The Borough, Block and Lot is Manhattan, Block 1373 (shared with Roosevelt Island), and Lot 200.^[6]

The island is owned by the New York State Government and is currently protected as a sanctuary for migrating birds. Public access is prohibited.^[7][8] Since 2016, the island has been designated a Recognized Ecological Complex under the city's Waterfront Revitalization Program.^[9][10] The United States Coast Guard maintains a 57-foot (17 m) tall lighted beacon on the island, designated "Roosevelt Island Reef Light 17";^[4][11] an earlier 23-foot (7 m) tall light had been erected in 1938,^[12] and another pair before then.^[13]

Mean sea level in the East River is sometimes measured in reference to the "Belmont Island Datum", 2.265 feet (0.69 m) below that of Sandy Hook.

In the 1890s, businessman William Steinway began a project to construct a tunnel for trolleys under the East River to link Manhattan to his eponymous company town, Steinway Village, in Astoria, Queens; the tunnel would be named the Steinway Tunnel after him. As part of this construction project, a shaft dug into the granite outcrop known as Man-o'-War Reef to reach the tunnels produced excess landfill that built up the reef and created a small island. Steinway died before his tunnels' completion, and financier August Belmont Jr. saw the project to completion between 1905 and 1907. Belmont Island, named after the financier, became the legal name of the island. Four workers were killed in a 1906 shaft accident under the island.^[14] The tunnels, which pass directly beneath the island, are still used by the IRT Flushing Line (7 and <7>​ trains), and are now part of the New York City Subway system.^[15] Buildings from the tunnel stayed up until at least 1918.^[16]

In 1909, Commissioner of Public Charities Robert W. Hebberd proposed connecting the southern tip of Blackwell's Island to Man o' War Reef using landfill to create an additional 16 acres (6.5 ha) of park space designed by architect Raymond F. Almirall. The proposal would have eliminated the need to use a boat to access Belmont Island.^[17]

On July 7, 1926, the submarine S-51 ran aground at Man-o'-War Reef while it was being towed down the East River to the Brooklyn Navy Yard. The vessel was pulled off the reef eleven hours later by tugboats with the help of the tide. The submarine had been raised from the bottom of the ocean earlier in the week after it had sunk off Block Island and was being taken to the Brooklyn Navy Yard for salvaging.^[18]

In the late 1930s, the U.S. Waterways Experiment Station conducted a study of tidal currents in the East River to improve alignments through Hell Gate and flow conditions in the vicinity of Belmont Island, the latter of which involved a tendency of northwesterly river currents during the flood tide to direct ship traffic towards the Manhattan shore. Twenty different improvement plans were tested, some of which included the complete removal of Belmont Island. The study recommended widening the channel to the south of Belmont Island and removing part of a rock ledge located north of the island.^[19] Improvements to the East River were recommended to the United States Congress the following year as part of a $39 million improvement program between the Brooklyn Navy Yard and Throgs Neck.^[20]

In the 1950s, Buckminster Fuller proposed installing a 200-foot-diameter (61 m) Geoscope with its bottom suspended 200 feet (61 m) above the water, supported by cables hung from towers erected on the outcropping of rocks in the middle of the East River one-quarter mile (400 m) south of Roosevelt Island. He later presented his idea to a group of United Nations ambassadors during a luncheon held at the Hotel Pierre, but no funds were available to construct the project, which was then estimated to cost $10 million.^[21]

On the evening of February 7, 1964, the 33,310-short-ton (30,218 t) Norwegian tanker Sigdal ran aground on the island. The vessel was traveling up the East River carrying fuel oil from Aruba to the Bronx. Such a ship normally would have been accompanied by one or two tugboats but it arrived in New York Harbor during a tugboat strike and was operating on its own. Fuel was offloaded from the tanker into lighter barges so the vessel could be pulled off the rock ledge; it took three days before the ship was freed by a salvage vessel from Merritt-Chapman & Scott and two tugboats.^[22][23][24]

In 1968, the Hudson Institute published a proposal for connecting Roosevelt Island and U Thant Island by landfill to form a single larger island, as part of an economic redevelopment. 42nd Street would have extended across the island from Manhattan to Queens, connected by a Ponte Vecchio-like bridge covered in shops. "Belmont Center", modeled on Rockefeller Center, would have had towers of up to 80 stories.^[25][26][27]

The Delacorte Fountain, a Jet d'Eau–like fountain sponsored by George T. Delacorte Jr. stood nearby at the southern tip of Roosevelt Island, and faced calls for its relocation to U Thant Island from the time it was dedicated in 1969 until it stopped operating in 1986 and was subsequently abandoned.^{[28][29][30][31]}

On August 25, 1972, the island was declared "Soviet Jewry Freedom Island" and symbolically occupied for 2+1⁄2 hours by six activists led by Manhattan and Bronx Borough Presidents Percy Sutton and Robert Abrams to protest a United Nations speech by Leonid Brezhnev and the imposition of the diploma tax as a barrier to emigration from the Soviet Union.^[32][33] Other members of the group that landed on the island included Rabbi Gilbert Klaperman, chairman of the Greater New York Conference on Soviet Jewry, and Sister Rose Thering of Seton Hall University. The group rented a tugboat for reporters and camera crews to cover the event and carried a 20 by 6 foot (6.1 m × 1.8 m) banner displaying the new name of the island. The event caught the attention of the Soviet delegation at the United Nations, which complained to Secretary-General Kurt Waldheim. The New York City Police Department dispatched a boat to the island, but let the group stay when they found out they had obtained a temporary deed to the island from state officials. Publicity for the event had been organized by Howard Rubenstein.^[33][34]

After the death of U Thant, the former Secretary-General of the United Nations, the island was adopted by a group called the Peace Meditation at the United Nations, employees at the United Nations headquarters and followers of the guru Sri Chinmoy, who served as the interfaith chaplain there.^[35] They leased the island from New York State, greened its surface, and unofficially renamed it after U Thant, who was a friend of Chinmoy. The island was dedicated to the memory of U Thant on September 16, 1977 in a ceremony attended by Daw Aye Aye Thant, the daughter of U Thant.^[36][37]

On October 7, 1982, Belmont Island was formally named as U Thant Island and the island, along with a 30-foot-high (9.1 m) "oneness arch" made of steel tubing, with a buried vessel preserving personal items of the island's namesake, was dedicated by Sri Chinmoy with officials from New York State in attendance.^{[36][38][39][40]} The followers of Sri Chinmoy made visits to the island once or twice a year for maintenance, but these visits became less frequent when security around the United Nations tightened in the mid-1990s.^[36][41] The group later affixed a sign to the west side of the island's navigational beacon tower that includes the name of the island, a note about its dedication, a poem written by Sri Chinmoy about U Thant, a brief biography of the former Secretary-General, and text that reads: "Simplicity was U Thant's life. Sincerity was U Thant's mind. Purity was U Thant's heart. His was the approach of serene and illumined dignity."^[36]

In 1999, The New York Times Magazine staged an international competition to design a time capsule to preserve artifacts for the next millennium. An entry by Caples Jefferson Architects proposed a granite obelisk on U Thant Island that would gradually disintegrate, leaving only the time capsule by the end of the 30th century.^[42]

During the 2004 Republican National Convention, local artist and filmmaker Duke Riley, who has traveled to various abandoned islands around the New York City area, rowed a boat with a friend to the island under cover of darkness, proclaimed it a sovereign nation and hoisted a 21-foot (6.4 m)-long pennant depicting two electric eels from the island's navigation tower. On their return voyage in daylight, they were apprehended by a United States Coast Guard boat but were not arrested. The entire incident was videotaped for a piece Riley titled Belmont Island (SMEACC).^[43]

• 
  Newly-built island in 1906 during tunnel construction
• 
  U Thant Island from the west-southwest
• 
  View of the islet from the south

The island has a small colony of double-crested cormorants, the population of which more than doubled from 2000 to 2011.^[44] Cormorant nests on the island have been observed on the ground, in trees and on the metal arch, the latter of which collapsed by 2011.^[45][46] Great black-backed gulls and herring gulls have also been spotted nesting on the island.^[45] In the most recent nesting survey conducted by NYC Bird Alliance, a total of 38 cormorant nests were counted on the island in May 2022.^[46]

The reefs in the waters surrounding the U Thant Island make it a popular spot for boats fishing for striped bass and bluefish.^[47][48][49]

Wikimedia Commons has media related to U Thant Island.

• Forgotten NY: An Island just for U and ...to the New York Islands
• NYC Bird Alliance: Harbor Herons Nesting Survey Project, 2005–2022 reports on cormorant and gull nesting activity at U Thant Island
• NYCSubway.org: The Steinway Tunnels