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Condition at this date:

Shape of tower in plan:

Form of tower:

Height from base to ventilator ball:

Height of focal plane
above mean high water:

Background of lighthouse as seen from sea:

Color of tower:

Color of tower/ how produced:

Tower connection:

Object for navigation:

Building materials:

General desc:

Wall thickness at base:

Wall thickness at parapet:

Diameter at base:

Diameter at parapet:

Kind of stairway and steps:

Number of landings:

Size of glass:

Number of windows and size of sash:

Number of doors:

Kind of foundation and depth below surface:

Character of soil surrounding the lighthouse:

Soil susceptibility:

Misc remarks:

Lighthouse Inspection Reports Database

Alcatraz Light Station - 1910

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good

square at base, octagonal balance of distance.

pyramidal

90' 2 1/4"

214'

None, except on N side by new military prison.

grey

natural color of concrete

connected, abuting 2 sides of base of tower

Harbor & range lights

concrete, reinforced by steel rods

2' 5"

10"

13' 9"

10' 8"

iron

varied, see plan

11 varied

reinforced concrete 5'

rock

N fog bell Oct. 23, 1899; S fog bell Oct. 30, 1900

Report Sections:

Premises | Lantern and Fixtures | Ventilators and Watchroom | Illuminating Apparatus | Closets and Storerooms

Lighthouse Access | Station Boat Info | Tools and Accessories | Light Vessel Specific | Inspection Reports

Supplemental Reports

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