ALCATRAZ ISLAND

Year Established:
1854
Existing:
Yes
Source:
LL-1901
File Type:
jpg (image/jpeg)
Photo Date:
2008
Photo Credit:
Chad Kaiser
Photo Courtesy of:
U.S. Lighthouse Society
Collection / Donor:

LOCATION

Location:
ALCATRAZ ISLAND/SAN FRANCISCO BAY
Latitude:
37° 49'29"
Longitude:
122° 25'21"
City / Town:
SAN FRANCISCO
U.S. State:
California
Location County:
SAN FRANCISCO
Country:
United States

OWNER & ACCESS

Owner / Manager:
USCG / NPS
Open to Public:
Yes
Light List Data:
  1. ALCATRAZ ISLAND
Light list data courtesy Gary Riemenschneider

STRUCTURE

Year Tower Established:
1909
Tower Construction Material:
REINFORCED CONCRETE
Tower Foundation:
MASONRY
Height of light above mean high water, in feet:
214
Height, in feet, from base of structure to center of lantern:
84
Tower Shape:
OCTAGONAL PYRAMIDAL
Fog Signal Building?:
No
Fog Signal Bldg Construction Materials:
WOOD FRAME
Keeper's Quarters?:
No
Other Structures:
STORAGE BUILDING (1909) IN THE BASEMENT OF KEEPERS QUARTERS

OPTICS

Active Aid to Navigation?:
Yes
Current Optic:
DCB-24
Original Optic Type:
THIRD ORDER, FRESNEL
Year Original Lens Installed:
1854
Private Aid:
No
USCG Access to Optics:
Yes

Comments:

Original tower replaced in 1909. Access is to grounds only


Entered by:
t.wheeler
Entered Date:
Jul 20, 2017