Fort Alcatraz was a United States Army
coastal fortification on
Alcatraz Island
Alcatraz Island () is a small island in San Francisco Bay, offshore from San Francisco, California, United States. The island was developed in the mid-19th century with facilities for a Alcatraz Island Lighthouse, lighthouse, a military fortif ...
near the mouth of
San Francisco Bay
San Francisco Bay is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, California, San Jose, and Oakland, Ca ...
in
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
, part of the Third System of fixed fortifications, although very different from most other Third System works. Initially completed in 1859, it was also used for mustering and training recruits and new units for the Civil War from 1861 and began secondary use as a long-term
military prison
A military prison is a prison operated by a military. Military prisons are used variously to house prisoners of war, unlawful combatants, those whose freedom is deemed a national security risk by the military or national authorities, and members ...
in 1868.
Major improvements, needed because of changes in artillery, began in the 1870s, but were underfunded and never fully completed, as the post came to be seen less as defense and more as a jail. The site was not used for any major works of the
Endicott Board’s plan for the defense of the Bay.
A large concrete prison block was erected between 1910 and 1912. In 1933–1934, this was modernized and became the
Alcatraz Federal Penitentiary
United States Penitentiary, Alcatraz Island, also known simply as Alcatraz (, ''"the gannet"'') or The Rock was a maximum security federal prison on Alcatraz Island, off the coast of San Francisco, California, United States, the site of a for ...
.
History
Early history
Native Americans, known as
Ohlone
The Ohlone, formerly known as Costanoans (from Spanish meaning 'coast dweller'), are a Native American people of the Northern California coast. When Spanish explorers and missionaries arrived in the late 18th century, the Ohlone inhabited the ...
(A
Miwok
The Miwok (also spelled Miwuk, Mi-Wuk, or Me-Wuk) are members of four linguistically related Native American groups indigenous to what is now Northern California, who traditionally spoke one of the Miwok languages in the Utian family. The word ...
Indian word), were the earliest known inhabitants. They gathered bird eggs and other products there, but did not generally permanently live on the island.
19th century

The earliest recorded owner of Alcatraz was William Workman, of the
Workman-Temple family The Workman-Temple family relates to the pioneer interconnected Workman and Temple families that were prominent in: the history of colonial Pueblo de Los Angeles and American Los Angeles; the Los Angeles Basin and San Gabriel Valley regions; and So ...
to whom it was given by
Mexican
Mexican may refer to:
Mexico and its culture
*Being related to, from, or connected to the country of Mexico, in North America
** People
*** Mexicans, inhabitants of the country Mexico and their descendants
*** Mexica, ancient indigenous people ...
governor
Pio Pico
Pio may refer to:
Places
* Pio Lake, Italy
* Pio Island, Solomon Islands
* Pio Point, Bird Island, south Atlantic Ocean
People
* Pio (given name)
* Pio (surname)
* Pio (footballer, born 1986), Brazilian footballer
* Pio (footballer, born 1 ...
in June 1846, with the understanding that Workman would build a lighthouse on it. Workman was co-owner of
Rancho La Puente
Rancho La Puente was a ranch in the southern San Gabriel Valley that measured just under , and remained intact from its establishment in the late 1700s as an outpost of Mission San Gabriel until about 1870. By modern landmarks, the ranch extended ...
and personal friend of Pio Pico. Later in 1846, acting in his capacity as Military Governor of California,
John C. Fremont, champion of
Manifest Destiny
Manifest destiny was a cultural belief in the 19th-century United States that American settlers were destined to expand across North America.
There were three basic tenets to the concept:
* The special virtues of the American people and th ...
and leader of the
Bear Flag Republic
The California Republic ( es, La República de California), or Bear Flag Republic, was an unrecognized breakaway state from Mexico, that for 25 days in 1846 militarily controlled an area north of San Francisco, in and around what is now Son ...
, bought the island for $5,000 in the name of the
United States government
The federal government of the United States (U.S. federal government or U.S. government) is the national government of the United States, a federal republic located primarily in North America, composed of 50 states, a city within a fede ...
from Francis Temple.
In 1850, President
Millard Fillmore
Millard Fillmore (January 7, 1800March 8, 1874) was the 13th president of the United States, serving from 1850 to 1853; he was the last to be a member of the Whig Party while in the White House. A former member of the U.S. House of Represen ...
ordered that Alcatraz Island be set aside specifically for military purposes based upon the U.S. acquisition of California from Mexico following the
Mexican–American War
The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the (''United States intervention in Mexico''), was an armed conflict between the United States and Second Federal Republic of Mexico, Mexico f ...
.
Fremont had expected a large compensation for his initiative in purchasing and securing Alcatraz Island for the U.S. government, but the U.S. government later invalidated the sale and paid Fremont nothing. Fremont and his heirs sued for compensation during protracted but unsuccessful legal battles that extended into the 1890s.

Following the acquisition of California by the United States as a result of the
Treaty of Guadalupe Hidalgo
The Treaty of Guadalupe Hidalgo ( es, Tratado de Guadalupe Hidalgo), officially the Treaty of Peace, Friendship, Limits, and Settlement between the United States of America and the United Mexican States, is the peace treaty that was signed on 2 ...
which ended the
Mexican–American War
The Mexican–American War, also known in the United States as the Mexican War and in Mexico as the (''United States intervention in Mexico''), was an armed conflict between the United States and Second Federal Republic of Mexico, Mexico f ...
(1848), and the onset of the
California Gold Rush the following year, the
U.S. Army began studying Alcatraz Island for coastal batteries to protect the entrance to
San Francisco Bay
San Francisco Bay is a large tidal estuary in the United States, U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the big cities of San Francisco, San Jose, California, San Jose, and Oakland, Ca ...
. In 1853, under the direction of
Zealous B. Tower, the
began fortifying the island, continuing until 1859, at cost of $87,698
The start of construction was a citadel, in this case meaning a lightly fortified barracks, at the top of sandstone rock outcrops. In every other Third System works, such structures are masked from direct fire by more solid fortifications, but not here. The upper part of the island was encircled with walls built of stone and bricks abutting the rock faces, unlike most other Third System works, which laid a heavier hand on the natural landscape.
Near the wharf, though, a later sallyport and a fortified barracks showed a more conventional design.
A lighthouse was built and 11 cannons were fixed.

Army engineer
James B. McPherson, later to become a prominent general during the Civil War, was one of the earliest commanders to serve on Alcatraz in 1858.
In 1859 Captain
Joseph Stewart became commander of the active fort.
Alcatraz was used to house soldiers who were guilty of crimes as early as 1859. By 1861, the fort was the military prison for the
Department of the Pacific
The Department of the Pacific or Pacific Department was a major command (Department) of the United States Army from 1853 to 1858. It replaced the Pacific Division, and was itself replaced by the Department of California and the Department of Ore ...
and housed Civil War
prisoners of war
A prisoner of war (POW) is a person who is held Captivity, captive by a belligerent power during or immediately after an armed conflict. The earliest recorded usage of the phrase "prisoner of war" dates back to 1610.
Belligerents hold priso ...
(POWs) as early as that year. Starting in 1863, the military also held private citizens accused of treason, after the writ of
habeas corpus in the United States
In United States law, ''habeas corpus'' () is a recourse challenging the reasons or conditions of a person's confinement under color of law. A petition for '' habeas corpus'' is filed with a court that has jurisdiction over the custodian, a ...
was suspended.
The number of cells were increased in 1867 and the facility became a long-term military prison in 1868.
Alcatraz was crucial to defense during the
American Civil War
The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States. It was fought between the Union ("the North") and the Confederacy ("the South"), the latter formed by state ...
(1861–1865), having some 111 cannons encircling the island at peak,
and was also used as a war camp. During the Civil War, the local federal forces had the onerous task of preventing local fighting between the Union and
Confederate supporters who were both part of the population of
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
, and to protect
San Francisco
San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of Ca ...
.
For example, in 1863,
Asbury Harpending outfitted a
schooner
A schooner () is a type of sailing vessel defined by its rig: fore-and-aft rigged on all of two or more masts and, in the case of a two-masted schooner, the foremast generally being shorter than the mainmast. A common variant, the topsail schoo ...
, the
J. M. Chapman
''J. M. Chapman'', a 90-ton schooner, was purchased in 1863, by Asbury Harpending and other California members of the Knights of the Golden Circle in San Francisco to outfit as a Confederate privateer.
Harpending's plan to capture Pacific Mail St ...
as a confederate privateer, intending it to prey on the Pacific Mail ships, which often carried cargoes of precious metals. The plan was interrupted early by the
USS Cyane
USS ''Cyane'' may refer to:
* USS ''Cyane'' (1815), was captured from the Royal Navy in 1815 and taken into the US Navy, where she served until 1836.
*, was a 22-gun sloop-of-war, launched in 1837 and decommissioned in 1871
*, was formerly ''Gwin' ...
, among others. Consequent to this, more and more were arrested for treason or enemy sympathies. To hold the increased number of prisoners, a temporary makeshift wooden prison was built in 1863 to the north of the guardhouse. In 1864, 15-inch
Rodman cannons were added to the fort's armament, and more
bombproof barracks built. By end of the Civil War in 1865, there were more than one hundred cannon on the island.

As the civil war ended, the military prison housed Confederate sympathizers who celebrated Lincoln's death. During the
Indian Wars
The American Indian Wars, also known as the American Frontier Wars, and the Indian Wars, were fought by European governments and colonists in North America, and later by the United States and Canadian governments and American and Canadian settle ...
that followed the civil war, Indians who went against the government were sent to the Alcatraz prison. On June 5, 1873,
Paiute Tom
Paiute (; also Piute) refers to three non-contiguous groups of indigenous peoples of the Great Basin. Although their languages are related within the Numic group of Uto-Aztecan languages, these three groups do not form a single set. The term "Paiu ...
was the first Native American who was imprisoned there on transfer from Camp McDermit in
Nebraska
Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the so ...
.
In the 1870s, Major
George Mendell
George may refer to:
People
* George (given name)
* George (surname)
* George (singer), American-Canadian singer George Nozuka, known by the mononym George
* George Washington, First President of the United States
* George W. Bush, 43rd Presiden ...
ordered the prisoners, aided by mules, to assist in changing the natural landscape of the island and creating a top level, dumping debris into the coves and bay.
In 1882 the citadel was enlarged to provide more accommodation for the families of the military officers working on Alcatraz.
Between 1873 and 1895, 32 Native Americans were imprisoned at the citadel on Alcatraz, including 19
Hopi
The Hopi are a Native American ethnic group who primarily live on the Hopi Reservation in northeastern Arizona, United States. As of the 2010 census, there are 19,338 Hopi in the country. The Hopi Tribe is a sovereign nation within the Unite ...
men held in captivity there between January and August 1895 after being transferred from
Fort Defiance.
The island continued to develop in the 1880s and in 1898 the population of Alcatraz increased dramatically from 26 to over 450 due to the Spanish–American War and placed a demand for new buildings.
The original barracks evolved into
Building 64
Building 64, also known as the Building #64 or the Building 64 Residential Apartments, was the first building constructed on the island of Alcatraz off the coast of San Francisco, USA, entirely for the purpose of accommodating the military officers ...
in 1905. The first hospital on Alcatraz opened in 1893.
As the number of prisoners to be housed in the citadel increased, more space was built in the form of the Upper Prison, which consisted of three wooden structures, each of two tiers, with the lower prison getting converted as a workshop. However, both Upper and Lower Prison cells, being made of wood, were frequently subject to fire hazards, and this led to change of the structural form of the barracks; concrete structures were built, replacing the wooden ones.
20th century

During the
Spanish–American War
, partof = the Philippine Revolution, the decolonization of the Americas, and the Cuban War of Independence
, image = Collage infobox for Spanish-American War.jpg
, image_size = 300px
, caption = (cl ...
, the number of prisoners increased substantially to 461 by 1902.
In 1904, an upper prison building was built at a higher level on the island and replaced the lower prison, with a capacity of 307 inmates.
Alcatraz was renamed as the "Pacific Branch, U.S. Military Prison" in 1907, and as the importance of the Island citadel became less and less obvious due to modernization of the naval facilities, infantry soldiers were shifted and prison guards brought in their place.
It developed a reputation for its brutal methods of torturing prisoners.

Alcatraz was barely affected by the
1906 San Francisco earthquake
At 05:12 Pacific Standard Time on Wednesday, April 18, 1906, the coast of Northern California was struck by a major earthquake with an estimated moment magnitude of 7.9 and a maximum Mercalli intensity of XI (''Extreme''). High-intensity s ...
which devastated the city, and the prison population dramatically increased as prisoners were temporarily transferred to the island due to damage in the city.
In 1907, Alcatraz Citadel ceased function as a military defense and became the Pacific Branch, U.S. Military Prison solely.
When the original 1860s citadel collapsed in 1908, the Citadel was demolished in 1909 up to its basement over which the new prison was built by the military prisoners between 1909 and 1911 and named as "the Pacific Branch, U.S. Disciplinary Barracks for the U.S. Army," which became popular as "The Rock."
The prison was
entirely rebuilt in concrete in 1910–1912 under the command of Colonel
Reuben Turner on a $250,000 budget on the site of the remains and short-lived upper prison building. Many of the former tunnels and chambers of the original fort remain today and are still accessible. This building was modernized in 1934 when it reopened as a federal penitentiary, the notorious Alcatraz prison which held America's most ruthless criminals until 1963.
In 1915 Alcatraz was renamed the "Pacific Branch, U.S. Disciplinary Barracks", to indicate that rehabilitation as well as punishment were to be provided. Soldiers with minor offences could be re-trained and returned to the army.
As a result, many reformed prisoners returned to active service. Although the facility was a military establishment, it had its fair share of prison escapes. 29 escapes were reported involving 80 convicts out of which 62 were caught and tried while the rest of the prisoners were not traced. In the prison escape of November 28, 1918, there were four prisoners who escaped in rafts, and they were seen at Sutro Forest. However, only one was caught and the others escaped.
[
]
Transfer to the Justice Department
With a small peacetime budget, and a small military, the Army was amenable to transferring the post to the Bureau of Prisons
The Federal Bureau of Prisons (BOP) is a United States federal law enforcement agency under the Department of Justice that is responsible for the care, custody, and control of incarcerated individuals who have committed federal crimes; that i ...
which sought a high-security site to combat prison escapes and prison breaks connected to the Prohitition and Depression-era crime wave.
Modernization of the prison began in October 1933 and Alcatraz Federal Penitentiary
United States Penitentiary, Alcatraz Island, also known simply as Alcatraz (, ''"the gannet"'') or The Rock was a maximum security federal prison on Alcatraz Island, off the coast of San Francisco, California, United States, the site of a for ...
opened in August 1934, ending some eighty years of U.S. Army occupation. 32 hardened Army prisoners remained at Alcatraz while the rest were shifted to Fort Leavenworth
Fort Leavenworth () is a United States Army installation located in Leavenworth County, Kansas, in the city of Leavenworth. Built in 1827, it is the second oldest active United States Army post west of Washington, D.C., and the oldest perman ...
, Kansas
Kansas () is a state in the Midwestern United States. Its capital is Topeka, and its largest city is Wichita. Kansas is a landlocked state bordered by Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to ...
, United States Penitentiary, Atlanta
The United States Penitentiary, Atlanta (USP Atlanta) is a medium-security United States federal prison for male inmates in Atlanta, Georgia. It is operated by the Federal Bureau of Prisons, a division of the United States Department of Justice ...
, Fort Jay
Fort Jay is a coastal bastion fort and the name of a former United States Army post on Governors Island in New York Harbor, within New York City. Fort Jay is the oldest existing defensive structure on the island, and was named for John Jay, a ...
, New Jersey
New Jersey is a U.S. state, state in the Mid-Atlantic States, Mid-Atlantic and Northeastern United States, Northeastern regions of the United States. It is bordered on the north and east by the state of New York (state), New York; on the ea ...
and several others.[
]
Architecture and fittings
The main mode of transport accessing the island was the ''General McPherson''. Upon embarking at the wharf, the citadel building was reached by going sup through the sloping passage behind the sally port
A sally port is a secure, controlled entry way to an enclosure, e.g., a fortification or prison. The entrance is usually protected by some means, such as a fixed wall on the outside, parallel to the door, which must be circumvented to enter an ...
, continuing to the top of the island, and crossing a drawbridge
A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat. In some forms of English, including American English, the word ''drawbridge'' commonly refers to all types of moveable ...
over the deep dry moat
A moat is a deep, broad ditch, either dry or filled with water, that is dug and surrounds a castle, fortification, building or town, historically to provide it with a preliminary line of defence. In some places moats evolved into more extensive ...
. It could hold up to 200 men during an emergency and enough supplies to last four months.
Alcatraz Citadel consisted of a basement, which contained the kitchen, bakery, bedrooms, storerooms and jail cells, and two levels above ground which contained the military personnel quarters, servant quarters, parlors and a mess room. In-ground water tanks and water tanks were situated on the roof of the citadel. Other buildings included Batteries Rosecranz and Halleck in the north, the barracks building in the northeast, Battery McClellan and Fog Bell House in the south, Battery McPherson in the west and Batteries Stevens and Mansfield in the northwest and the lighthouse aside the main citadel.
Battery McClellan was equipped with a 15-inch Rodman gun
Drawing comparing Model 1844 8-inch columbiad and Model 1861 10-inch "Rodman" columbiad. The powder chamber on the older columbiad is highlighted by the red box.
The Rodman gun is any of a series of American Civil War–era columbiads designed by ...
weighing over 25 tons, capable of launching a 330-pound explosive 4,680 yards when angled at 25 degrees. The Parade Grounds were located in the left centre. When the new concrete prison was built in 1910–1912, iron staircases in the interior were retained from the old citadel and massive granite blocks originally used as gun mounts were reused as the wharf's bulkheads and retaining walls.
References
* {{cite journal , last1=The Rock , year=1915 , title=A Brief History of the Island of Alcatraz , journal=The Rock , volume=1 , issue=January , page=3 , publisher=Improvement Fund, Pacific Branch United States Disciplinary Barracks, Alcatraz, California , url=https://books.google.com/books?id=_T1OAAAAYAAJ&pg=PA3 , access-date=8 November 2014
Alcatraz Island
Alcatraz
Alcatraz Island () is a small island in San Francisco Bay, offshore from San Francisco, California, United States. The island was developed in the mid-19th century with facilities for a lighthouse, a military fortification, and a military pri ...
Government buildings completed in 1859
Infrastructure completed in 1859
1859 establishments in California
United States Army posts
Military prisons in the United States