Report for Sentinel Island Light-station (Alaska) - 1932

District: 13th
Inspector: Various
Location: On island of same name northern part of Favorite Channel.
Date of Report: 10/14/1932
Latitude: 58° 32' 40"
Longitude: 134° 55' 12"
Site: Public lands reserved by Executive Order.
Date of Reservation: 01/06/1901
Date of Deed:
Date of Permission:
Date of Lease:
Area of the Entire Site: 6.55 acres
Area Inclosed: None
Character of Soil:
Distance of tower from Nearest High-Water Mark: 110 feet
Inclosures to Premises / Type of Fence: None.
Wharf or Landing on Premises: Small wharf with derrick
Road to Land or Wharf Chararacter of and Distance: By gas boat from Juneau, 43 miles, via south side Douglas Island or 25 miles over Mendenhall Bar. Mail service by special arrangement, which varies.
Means to Reach Light Station:
Distance to Nearest Road:
Distance to Post Office:
Distance to Village:
Facilities for Public Conveyance:
Facilities for Private Conveyance:
Means Used for Support of Lantern: Lantern surmounts square tower rising from 2 story frame building used as dwelling.
Number of Separate Lights: 1
First Built or Established: 1902
Last Rebuilt, Repaired, or Renovated: No extensive repairs
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: 82 feet
Background of Lighthouse as Seen from Sea: Sky or timbered shoreline.
Color of Tower: White building, lead color trimmings, brown roof.
Color of Tower/ How Produced: Painted.
Tower Connection: Surmounts keeper's dwelling.
Object of Navigation: For general navigation of main inside passage via Favorite Channel & Lynn Canal.
Building Materials: Wood, concrete foundation.
General Description:
Wall Thickness at Base:
Wall Thickness at Parapet:
Diameter at Base:
Diameter at Parapet:
Kind of Stairway and Steps: Wood stairway, iron ladder in tower.
Number of Landings:
Size of Glass: 10" x 10"
Number of Windows and Size of Sash: 6; 2'0" x 2'0"
Number of Doors: 1; 2'4" x 6'4"
Kind of Foundation and Depth Below Surface:
Character of Soil Surrounding the Lighthouse: Located on a small, rocky, flat topped partly timbered islet.
Soil Susceptibility:
Miscellaneous Remarks: No communication with station by telegraph or telephone. Station has radio communication when there is a keeper on station who can send & receive
Lantern and Fixtures
Order of Lantern: 4th order
Shape of Lantern: Cylindrical
Diameter to Glass: 7' 8 1/16"
Diameter in the Clear:
Number of Sides:
Type of Bars: Helical
Thickness of Bars:
Height Glazed: 3' 1.25"
Number of Plates in Height: 1 & 2 alternating
Number of Plates Each Side:
Thickness of Plates: 1/4"
Size of Plates: 2' 1.081" x 2' 1.081"
Number of Storm Panes:
Unglazed Side of Lantern: None
What Bearings: None.
Construction Material Lantern: Iron, bronze, brass, glass.
Construction Material Roof / Cowl: Conical, iron, zinc lining.
Ventilator / Cowl: Iron, 17" diameter.
Lightning Spindle: Brass, platinum point.
Description of Lightning Rod:
Balustrade: Wood, opper covered floor; octagonal, balustrade 2' 7" high.
Lantern Doors: Has 1 - iron, hinged, with lock.
Floor of Lantern: Wood, 7/8" x 4' T&G.
Watchroom Doors: None.
Parapet Diameter:
Location / Number: In lantern parapet
Ladders / Cleaning Arrangement: Wodden step ladder
Curtain Hooks / Hanger: Spring roller curtains, brass hangers.

How is Watchroom Fitted: None
How is Relief Called: None.
Where is Call System Led:
Illuminating Apparatus
Kind of Apparatus:
Intensity in Candles: 8000 cp
Name of Maker: Henry Lepaute, Paris
Year Made: Unknown
Marks and Number: None
Order of Apparatus: 4th
Inside Diameter: 19.68"
Light Characteristic: Group Flashing white every 10 sec., thus; flash 0.3 sec., eclipse 0.9 sec., flash 0.3 sec., eclipse 4.5 sec.
Time of Revolution:
Flash Interval:
Duration of Flash:
Arc of Each Fixed Part:
Number of Panels: 4, 360 degrees lens
Number of Flash Panels: None
Arc of Each:
Number of Elements in Central Drum: 5
Number of Prisms Above Center Drum: 6
Number of Prisms Below Center Drum: 3
Does Apparatus Revolve?: False
Is There a Revolving Belt?: False
Revolving Panels:
How Flash is Produced: Plashes produced by flashing mechanism located in generating room, Asst. Keeper's basement.
Number of Vertical Elements Panel:
Fixed Lens Covered:
Pedestal: Cast iron ring at floor; 4 iron posts with polished brass sleeves supporting a steel plate 19" diam. & polished brass intermediate disc.
Service Table:
Draft Tube Description: Draft tube to ventilator ball, no damper.
Revolving Machinery:
Standby and Description:
Chariot Float or Balls:
Chariot Description:
Length of Drop Tube:
Clock Weight:
Length of Winding Time:
Drive During Rewind:
Machinery Protection:
Lens Protection: No.
How Color is Produced: White light
Red Sectors Description: None.
Where Color Attached:
Form of Colored Glass:
Lamp Description: 300 watt, 110 volt, PS 35 clear Mogul base.
Type of Illuminant: Electricity
Number of Spare Lamps: 2-4th order 1 wick Funk-Heep oil lamps for emergency relief.
Number of Spare Burners:
Candle Power: 8000 through lens.

Occulting Light
Characteristic: Group Flashing white every 10 sec., thus; flash 0.3 sec., eclipse 0.9 sec., flash 0.3 sec., eclipse 4.5 sec.
Time Limit: Not known
Eclipse Type:
Size and Amplitude:
Axis Rotation:
Axis Relation:
Screen Revolution:
Screen Number:
Screen Time:
Screen Form:
Screen Mounting:
Screen Order:
Screen Date:
Valve Maker:
Valve Pattern:
Closets and Store Rooms
Tower Closet Use: Locker on attic floor level.
Oil House Description: 125 feet NW of dwelling & 60 ft. NE of fog signal building.
Oil House Inside Dimension: 7'10" x 11'4" x 8'3" high
Oil House Construction Material: Wood frame & inside ceiling; outside walls & roof cor. galvanized sheet iron; concrete foundation & floor.
Oil House Capacity: 980
Other (Describe): Lockers in pantry; closet in each bedroom.
Suitability: Suitable
Fog Signal General
Fog Signal Kind: Type "C" Air Diaphone (established Feb. 8, 1925)
Time to Start: 10 minutes.
How Long Will Pressure Last: 6 minutes
Year of Manufacture:
Characteristic: Blast 5 sec. Silent 25 sec., Blast 5 sec., Silent 25 sec.
Duplication: Engine, compressor & air receiver. 3rd class Daboll reed horn in reserve.
Timing Device: Chain tripping gear driven by engine.
If whistle, siren, or trumpet, Pressure at Which Blown: 30 lbs.
Height Above Water: 55 feet
Compass Direction: 246 degrees
Location: In separate building near westerly side of island the horn pointing toward channel on that side of island.
Distance and Direction: 160 fet. true.
Water Supply: Rain water from roof. 2 concrete cisterns under building, each 4' x 8.5' x 4' deep.
Reached from Lighthouse: By concrete walk.
Description of Fog Signal Building: 1 story frame building 20' x 20'; concrete foundation & floor; white with red shingle roof; heated by coal heater, Superior air-tight #218.
Pressure And Recording Gauge: 4"
Internal Combustion Signal
Fog Signal Kind:
Internal Combustion Kind: Charter-Mietz Vertical Oil Engine & Compressor.
Internal Combustion Manufacturer: Charter Gas Engine Co., Sterling, Ill.
Internal Combustion Date: July 1926
Internal Combustion Size: 7" x 8"
Internal Combustion Horsepower: 9
Internal Combustion Fuel: Diesel oil
Internal Combustion Starter: By heating iron ball using blow-torch primed with
Compressor Maker: Charter Gas Eng. Co.
Compressor Seat: Same bed, direct connected.
Compressor Machinery:
Compressor Diameter: 7"
Compressor Stroke: 8"
Compressor RPMs: 400 rpm
Character of Air Inlet: Disc 4.5"
Kind of Unloader: Spring compression
Diameter of Delivery Pipe: 2"

Daboll Signal
Daboll: 3rd class
Daboll Reed:
Daboll Length: 8-7/16"
Daboll Breadth: 2.25"
Daboll Base Thickness: 3/8"
Daboll Tip Thickness: 3/16"

Air Receiver
Number: 2
Diameter: 3.5 feet
Height: 7' 10"
Capacity Cubic Feet: 76 feet
Pressure in Each: 30 lbs.
Make of Reducing Valve: None.
Location: In same building, double dwelling.
Coloring: White with red roof.
Construction Materials: Wood; 2 story frame building, shingle roof, concrete foundation & basement.
Number of Rooms: 6 room, bath & woodshed.
Number of Dwellings: 1 double
Heating Plant: Hot water, B-8 Capitol Red Top Water boiler in keeper's basement, heats entire building.
Number of Keepers: 1 with family.
Furnished Quarters: Both keepers & their families.
NOT Furnished Quarters: None
Outhouses: Oil house, shop, boat house, hoist house, 2 toilets, chincken house.
Outhouse Coloring: White with lead color trimmings.
Paths and Walks: Concrete walk connecting dwelling with fog-signal building & oil house.
Area Inclosed:
Area of Garden:
Area Timber or Shrubbery:
Cultivation Area Available: 1/8 acre
Area Cultivated: 1/16 acre
Character of Surroundings: Rocky, covered with thin layer of soil; island timbered, except where cleared.
Stove, Maker: Monarch
Stove, Size: Pro. 7559
Sink, Maker:
Sink, Size:
Pump, Maker:
Pump, Size:
How Procured: Rain water from roof of dwelling
Quality: Good.
Quantity: Ample
Injury Possible: No.
Purity Precaution: Each cistern under dwelling, used for drinking water, has brick filter wall.
Tank Capacity: 2 @ 970 cu. ft.
Tank Material: All concrete.
Distilling Apparatus: False
Distilling Manufacturer:
Well Description:
Well Diameter:
Well Lining:
Pump or Bucket: Pump from cistern
What Power Used: Hand pump & electric pump for each dwelling
Distance from Dwelling: Under dwelling
General Opinion: Healthful
Local Causes:
Recommended Improvements:
Access to Lighthouse: Wharf 28.5" x 47': foundation consists of iron cased concrete piers built on rock; outer piling is creosoted outer face of wharf is at low water line. Steamers cannot go alongside; small boat can go alongside at any stage of tides.
Distance and Direction: 350 feet, 128 degrees true.
Miscellaneous Remarks: Boathouse 15' x 18.5' and 22.5' long on wharf. Tram leads upgrade from wharf over trestle to shore & at point about 100' from wharf makes nearly right angle bend, continues upgrade to dwelling then around another bend to oil house. Stiff leg derrick on wh
Boat #1
Boat Number: 88
Type: Dinghy
Length: 4'4"
Width: 15'
When Built: 1931
Date Harbored at Station: Oct. 1931
Sails: False
Suited to Work: Yes
Boat #2
Boat Number: 22
Type: Launch
Length: 5'8"
Width: 18'
When Built: Not known
Date Harbored at Station: Sept. 30, 1915
Sails: False
Suited to Work: Yes
Boat #3
Boat Number: 82
Type: Skiff
Length: 54"
Width: 14'
When Built: Purchased Aug. 1930
Date Harbored at Station: Aug. 1930
Sails: False
Suited to Work: Yes

Power Boat
Engine Type: Palmer "Litte Husky"
Horsepower: 10-15
Engine Maker: Palmer Bros., Coscob, Conn.
Spare Coil:
Battery: Dry. 1 hotshot, 5-cell.
Propeller Diameter: 12"
Propeller Pitch: 14"

Hoisting Engines
Hoisting Engine Kind: Gass
Engine RPMs: 350 rpm
Engine Diameter: 6.25"
Engine Stroke: 7.75"
Engine Boiler: None
Engine Maker and Date: Fairbanks Moras & Co., 1916
Serial Number: #118168
Cylinders and Size: 1
Horsepower: 6 hp
Fuel: Gasoline
Hoist Starter:
Hoist Miscellaneous:

General Information: Launch is open but has spray hood forward.
Boats on Station: In boat house on wharf.