Alcatraz Island (California)
Historical Light List Characteristics
| 1857-1858 | F W. W14. | LHB Light List (US): 376 |
| 1860 | LHB Light List (US): 358 | |
| 1865 | LHB Light List (All Coasts): 364 | |
| 1866 | LHB Light List (All Coasts): 368 | |
| 1868 | LHB Light List (All Coasts): 370 | |
| 1878 | F W. W19. | LHB Light List (All Coasts): 462 |
| 1879 | LHB Light List (All Coasts): 481 | |
| 1881 | LHB Light List (Dist. 12): N/A | |
| 1886 | LHB Light List (All Coasts): 614 | |
| 1887 | LHB Light List (Dist. 12): N/A | |
| 1888 | LHB Light List (All Coasts): 654 | |
| 1892 | LHB Light List (Dist. 12-13): 845 | |
| 1893 | LHB Light List (Dist. 12-13): 870 | |
| 1894 | LHB Light List (Dist. 12-13): 887 | |
| 1895 | LHB Light List (Dist. 12-13): 903 | |
| 1896 | LHB Light List (Dist. 12-13): 1004 | |
| 1900 | LHB Light List (Dist. 12-13): 27 | |
| 1906 | Fl W 15s. W19. | LHB Light List (Dist. 12-13): 34 |
| 1911 | Fl W 15s. W21. | USLHS Light List (16th-18th): N/A |
| 1914 | Fl W 5s. W21. fl 0.5. | USLHS Light List (Pacific): 37 |
| 1930-1933 | USLHS Light List (Pacific): 89 | |
| 1945 | USCG Light List (Pacific): 288 | |
| 1950-1951 | USCG Light List (Pacific): 284 | |
| 1952-1959 | Fl W 5s. W21. fl 0.7. | USCG Light List - Vol. I-V: 301 |
| 1960 | Fl W 5s. W21. fl 0.3. | |
| 1961-1962 | USCG Light List - Vol. III: 301 | |
| 1963 | Fl W 5s. W21. fl 0.2. | |
| 1964-1972 | Fl W 5s. W21. | USCG Light List - Vol. III: 651 |
| 1973-1974 | Fl W 5s. W22. | |
| 1975-1984 | USCG Light List - Vol. III: 578 | |
| 1985 | USCG Light List - Vol. VI: 578 | |
| 1986 | USCG Light List - Vol. VI: 4315 | |
| 1988 | ||
| 1990 | ||
| 2004 |
Historical Light List Optics and Structures
| 1857 | 3rd | 36 | 166 | N/A | LHB Light List (US): 376 |
| 1858 | |||||
| 1860 | LHB Light List (US): 358 | ||||
| 1865 | LHB Light List (All Coasts): 364 | ||||
| 1866 | LHB Light List (All Coasts): 368 | ||||
| 1868 | LHB Light List (All Coasts): 370 | ||||
| 1878 | Light on a circular white-brick tower, rising from one and a half story keeper's dwelling, which is of brick, and white-washed. The fog-bell is placed on the southeast extremity of the island, about 600 feet southeast from the light-house. | LHB Light List (All Coasts): 462 | |||
| 1879 | LHB Light List (All Coasts): 481 | ||||
| 1881 | N/A | White; lantern, red. Circular tower on white dwelling, one and a half story. | LHB Light List (Dist. 12): N/A | ||
| 1886 | 166 | Circular white tower, rising from white dwelling; dome of lantern, red. The fog-bell is on the S. E. extremity of the island, about 400 feet S. E. from the light-house. | LHB Light List (All Coasts): 614 | ||
| 1887 | N/A | N/A | White; lantern dome, black. Circular tower on white dwelling. | LHB Light List (Dist. 12): N/A | |
| 1888 | 3rd | 166 | Circular white tower, rising from white dwelling; lantern, black. The fog-bell is on the S. E. extremity of the island, about 400 feet S. E. from the light-house. | LHB Light List (All Coasts): 654 | |
| 1892 | N/A | Cylindrical white tower, rising from white dwelling with red roof; lantern, black. | LHB Light List (Dist. 12-13): 845 | ||
| 1893 | 166 | LHB Light List (Dist. 12-13): 870 | |||
| 1894 | LHB Light List (Dist. 12-13): 887 | ||||
| 1895 | LHB Light List (Dist. 12-13): 903 | ||||
| 1896 | LHB Light List (Dist. 12-13): 1004 | ||||
| 1900 | 164 | LHB Light List (Dist. 12-13): 27 | |||
| 1906 | 4th | LHB Light List (Dist. 12-13): 34 | |||
| 1911 | N/A | N/A | Gray. Octagonal, pyramidal, concrete tower. | USLHS Light List (16th-18th): N/A | |
| 1914 | N/A | 84 | 214 | Gray; octagonal, pyramidal tower. | USLHS Light List (Pacific): 37 |
| 1930-1933 | 4 ei | 91 | Gray, octagonal, pyramidal tower. | USLHS Light List (Pacific): 89 | |
| 1945 | 4 e | USCG Light List (Pacific): 288 | |||
| 1950-1951 | USCG Light List (Pacific): 284 | ||||
| 1952-1960 | N/A | N/A | Grey, octagonal, pyramidal tower. | USCG Light List - Vol. I-V: 301 | |
| 1961-1963 | USCG Light List - Vol. III: 301 | ||||
| 1964-1968 | USCG Light List - Vol. III: 651 | ||||
| 1969-1974 | Gray, octagonal, pyramidal tower. | ||||
| 1975-1982 | USCG Light List - Vol. III: 578 | ||||
| 1983-1984 | Gray, octagonal, tower. | ||||
| 1985 | USCG Light List - Vol. VI: 578 | ||||
| 1986 | Gray octagonal tower. | USCG Light List - Vol. VI: 4315 | |||
| 1988 | |||||
| 1990 | |||||
| 2004 |
Historical Light List Audible Fog Signals
| 1857-1858 | Fog-bell, struck by machinery. | None | LHB Light List (US): 376 |
| 1860 | LHB Light List (US): 358 | ||
| 1865 | LHB Light List (All Coasts): 364 | ||
| 1866 | LHB Light List (All Coasts): 368 | ||
| 1868 | LHB Light List (All Coasts): 370 | ||
| 1878 | A bell. struck by machinery, four blows at intervals of 9 seconds, followed by a pause of 28 seconds. | LHB Light List (All Coasts): 462 | |
| 1879 | LHB Light List (All Coasts): 481 | ||
| 1881 | None | LHB Light List (Dist. 12): N/A | |
| 1886 | Bell struck by machinery five blows, at intervals of 10 sec., followed by a pause of 25 sec. | LHB Light List (All Coasts): 614 | |
| 1887 | None | LHB Light List (Dist. 12): N/A | |
| 1888 | Bell struck by machinery five blows, at intervals of 10 sec., followed by an interval of 25 sec. | LHB Light List (All Coasts): 654 | |
| 1892 | LHB Light List (Dist. 12-13): 845 | ||
| 1893 | LHB Light List (Dist. 12-13): 870 | ||
| 1894 | Bell struck by machinery five blows, at intervals of 10 sec., followed by a silent interval of 25 sec. | LHB Light List (Dist. 12-13): 887 | |
| 1895 | LHB Light List (Dist. 12-13): 903 | ||
| 1896 | LHB Light List (Dist. 12-13): 1004 | ||
| 1900 | LHB Light List (Dist. 12-13): 27 | ||
| 1906 | LHB Light List (Dist. 12-13): 34 | ||
| 1911 | None | USLHS Light List (16th-18th): N/A | |
| 1914 | Electric sireno; group of 2 blasts every 30 sec.: 1st blast 4 sec. Silent 4 sec. 2d blast 4 sec. Silent 18 sec. | USLHS Light List (Pacific): 37 | |
| 1930-1933 | SIREN, electric; gp. 2 blasts every 30 sec.: Blast 4 sec., silent 4 sec. blast 4 sec., silent 18 sec. | USLHS Light List (Pacific): 89 | |
| 1945 | HORN, diaphragm, air; group of 2 blasts every 30 sec.; blast 2 sec., silent 2 sec, blast 2 sec., silent 24 sec. | Siren, electric, if horn is disabled. | USCG Light List (Pacific): 288 |
| 1950 | USCG Light List (Pacific): 284 | ||
| 1951 | HORN, diaphragm, air; group of 2 blasts every 30 sec.; blast 2 sec., silent 2 sec, blast 2 sec., silent 24 sec.; located 175 yards 1431/2° from light. | ||
| 1952-1960 | HORN, diaphragm; gp of 2 blasts ev 30s (2sbl-2ssi-2sbl-24ssi). Located 175 yards, 1431/2° from light. | Siren, if horn is disabled. | USCG Light List - Vol. I-V: 301 |
| 1961-1963 | USCG Light List - Vol. III: 301 | ||
| 1964-1965 | USCG Light List - Vol. III: 651 | ||
| 1966-1968 | None | ||
| 1969-1972 | HORN, diaphragm; 1 blast ev 30s (3sbl). Located 175 yards, 1431/2° from light. | ||
| 1973-1974 | None | ||
| 1975-1984 | USCG Light List - Vol. III: 578 | ||
| 1985 | USCG Light List - Vol. VI: 578 | ||
| 1986 | USCG Light List - Vol. VI: 4315 | ||
| 1988 | |||
| 1990 | |||
| 2004 |
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1854 - 1906 (Approximate location: Located about 100 feet north of the current 1911 lighthouse.) |
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1911 - Present |