Report for Sentinel Island (Alaska) - 1935

District: 16th
Location: On island N entrance to Favorite Channel
Date of Report: 09/07/1935
Latitude: 58° 32' 40"
Longitude: 134° 55' 12"
Site: Public land 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:
Character of Soil:
Distance of tower from Nearest High-Water Mark: 110'
Inclosures to Premises / Type of Fence:
Wharf or Landing on Premises:
Road to Land or Wharf Chararacter of and Distance:
Means to Reach Light Station:
Distance to Nearest Road:
Distance to Post Office: 43 miles to Juneau by steamer, 25 miles to Juneau by gas boat over Mendenhall Bar & also 6 miles to Eagle Harbor by boat & 26 miles to Juneau by highway
Distance to Village:
Facilities for Public Conveyance:
Facilities for Private Conveyance:
Means Used for Support of Lantern:
Number of Separate Lights:
First Built or Established: 1902
Last Rebuilt, Repaired, or Renovated: 1935, new light & fog signal completed, dwelling remodeled as lantern moved to new tower.
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: 86'
Background of Lighthouse as Seen from Sea:
Color of Tower: White, lantern black
Color of Tower/ How Produced:
Tower Connection:
Object of Navigation:
Building Materials: Reinforced concrete
General Description:
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: 5 windows in tower, 12 windows in main bldg, glass size 8.5" x 13 3/8" & 26" x 28"
Number of Doors: 1 in tower 2' x 6' 8". 2 main bldg 3' 6" x 7'
Kind of Foundation and Depth Below Surface:
Character of Soil Surrounding the Lighthouse:
Soil Susceptibility:
Miscellaneous Remarks: Located on small, rocky, flat topped, partly timbered islet. Vessels may pass on either side but channel on W side is 1 most used.
Lantern and Fixtures
Order of Lantern: 4th
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: 7/8"
Height Glazed: 3' 1 1/4"
Number of Plates in Height: 1 & 2 alternating
Number of Plates Each Side:
Thickness of Plates: 1/4"
Size of Plates: 2' 1.081" sq. glass curved in line of 1 diag., other diag. straight.
Number of Storm Panes:
Unglazed Side of Lantern: None
What Bearings:
Construction Material Lantern: Iron, bronze, brass, glass
Construction Material Roof / Cowl: Conical, iron, zinc lining
Ventilator / Cowl: Iron; dia. 17"
Lightning Spindle:
Description of Lightning Rod:
Balustrade: Concrete platform with brass railing.
Lantern Doors: 1 iron door, hinged with lock.
Floor of Lantern: Concrete
Watchroom Doors:
Parapet Diameter:
Illuminating Apparatus
Kind of Apparatus:
Intensity in Candles: 8,000
Name of Maker: Henry LePaute, Paris
Year Made:
Marks and Number: None
Order of Apparatus: 4th
Inside Diameter: 19 11/16"
Light Characteristic: 1 sec. flash, 1 sec. eclipse, 1 sec. flash, 7 sec. eclipse
Time of Revolution:
Flash Interval:
Duration of Flash:
Arc of Each Fixed Part:
Number of Panels: 4, 360 degrees
Number of Flash Panels:
Arc of Each:
Number of Elements in Central Drum: 5
Number of Prisms Above Center Drum: 6, fixed
Number of Prisms Below Center Drum: 3, fixed
Does Apparatus Revolve?: False
Is There a Revolving Belt?: False
Revolving Panels:
How Flash is Produced: By flashing mechanism located in 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" dia. & polished brass intermediate disc.
Service Table:
Draft Tube Description:
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:
How Color is Produced:
Red Sectors Description:
Where Color Attached:
Form of Colored Glass:
Lamp Description: Electric, battery & gen. light source, oil wick lamp standby
Type of Illuminant:
Number of Spare Lamps: 1 dz. 300W, 110V P.S. 35 clear lamps & 2, 4th order; 1-wick Funk-Heap oil
Number of Spare Burners:
Candle Power:
Closets and Store Rooms
Tower Closet Use: Locker in accordance with drawing L 356 around 2 sides basement stairway on main floor.
Oil House Description: 1 oil house; 125' NW of dwelling & 20' N of fog signal bldg.
Oil House Inside Dimension: 8' 3" high x 7' 10" x 11' 4" walls.
Oil House Construction Material: Wood frame & inside ceiling. Outside & roof, corr. galv. sheet iron, concrete foundation & floor.
Oil House Capacity: 980 gal in 5-gal cans. 3830 gal. diesel oil tank cast in concrete in basement. Tank is 1/4" thick, 12' x 6' 6" x 9'.
Other (Describe): Gasoline stored in 2 - 675 gal tanks & 1 - 200 gal tank buried in front of fog signal bldg.
Fog Signal General
Fog Signal Kind: 2 type "O" Air Diaphone, Installed, Feb., 1935
Time to Start:
How Long Will Pressure Last:
Year of Manufacture:
Characteristic: Blast 5 sec., silent 25 sec.
Duplication: Yes
Timing Device: 2 elec motor driven std. timers. Motors are 1/10 HP Janette Mfg. Co., Chicago, IL. type DS 18 w/ reduc. gear, 1725 - 216 rpm. Ser. # motor #1-241078. 6" V groove pulley driv. 10" timer pulley. Timer geared to 120 to 1. Air Motor for standby + 2 elec motor
If whistle, siren, or trumpet, Pressure at Which Blown:
Height Above Water: 57'
Compass Direction: 247 degrees
Location: 70' NW of dwelling.
Distance and Direction:
Water Supply:
Reached from Lighthouse:
Description of Fog Signal Building: 2 story reinforced white concrete bldg 20' x 35' with 11' sq. white concrete tower in center & front of bldg & attached to & extending 5' above roof of main bldg & heated by 1-W-S American Radiator Co., hot water boiler loc. in basement with radiators.
Pressure And Recording Gauge: 10" pressure gauge
Auxillary Compressors
Compressor #1
Engine Kind: Vertical & diesel, Charter-Mietz
Engine Manufacturer: Charter Gas Engine Co., Sterling IL
Engine Serial Number: S 9065; N 9066
Engine Cylinder Size: 1
Engine HP: 9 HP
Engine Speed (RPM):
Starter: Air after preheating with kerosene torch. Hot ball
Size, Capacity, Receivers: 2 tanks 3' 6" x 7' 10" 76 cu. ft.
Remarks: Fuel - gasoline
Compressor Kind: Vertical single acting
Compressor Maker:
Compressor Serial Number:
Compressor Cylinder Size: 1
Compressor Air Capacity:
Compressor RPMs:
Compressor #2
Engine Kind: Fairbanks Morse Type Z horizontal
Engine Manufacturer: Fairbanks Morse Eng. Co.
Engine Serial Number:
Engine Cylinder Size:
Engine HP: 2 HP
Engine Speed (RPM):
Starter: Hand cranking
Size, Capacity, Receivers:
Remarks: Fuel - gasoline
Compressor Kind: Fairbanks Morse Type E direct connected
Compressor Maker:
Compressor Serial Number:
Compressor Cylinder Size:
Compressor Air Capacity:
Compressor RPMs:
Compressor #3
Engine Kind: Type AG hopper cooled engine
Engine Manufacturer: Novo Engine Co.
Engine Serial Number:
Engine Cylinder Size:
Engine HP:
Engine Speed (RPM): 600
Size, Capacity, Receivers: Hand unloader with 18" x 48" receiver with pop safety valve, gauge & drain cock & piping.
Compressor Kind: Single stage vert 2.5" x 3" bore & stroke
Compressor Maker: Worthington
Compressor Serial Number:
Compressor Cylinder Size: 1
Compressor Air Capacity: 6.5 cu. ft. free air/min @ 200 lbs pressure
Compressor RPMs:

Engine Generators
Engine Kind: Le Roi 4 cyl. 4 cycle
Engine Manufacturer: Le Roi Engine Co., Milwaukee
Engine Serial Number: 108974, 108975 Model 2CW
Number of Cylinders (Engine): 4
Engine Cylinder Size: 3 1/8" dia. 4.5" stroke
Engine HP:
Fuel: Gasoline
Starter: Automatic by push button
Date Installed: 1 unit, 1934 & other unit, Feb., 1935
Generator Kind: Direct Current
Generator Maker: Louis Allis Co., Milwaukee
Generator Serial Number: 177295
Generator Cylinder Size: Generator type NA
Air Capacity: 5 KW
Number of Cylinders (Generator): Generator dir conn'd to engine w/ flex. coupling.

Storage Battery
Kind: Lead-acid type Exide Iron-clad type 6V-SB-200 AH
Maufacturer: Electric Storage Battery Co.
Number of Cells: 56
Cells Per Tray: 3
Capacity: 200 AH
Location: Battery room in basement
Date Installed: Feb., 1935
Location: 1 wooded 2-story frame bldg with asbestos shingles (put on 9/30/1935), concrete foundation & basement.
Coloring: White with lead color trimming
Construction Materials:
Number of Rooms: 6 rooms, bath & wood shed
Number of Dwellings: 2
Heating Plant: 1 hot water circ. system heated by a 1-W-5 American Radiator Co., hot water boiler. 6 radiators on main floor.
Number of Keepers:
Furnished Quarters:
NOT Furnished Quarters:
Outhouses: Oil house, carpenter shop, boathouse, 2 hoist houses, 2 toilets & chicken house.
Outhouse Coloring:
Paths and Walks: Concrete sidewalks connect dwelling with carpenter shop & fog signal bldg.
Area Inclosed:
Area of Garden:
Area Timber or Shrubbery:
Cultivation Area Available:
Area Cultivated:
Character of Surroundings:
Stove, Maker: Monarch # 3856 (2)
Stove, Size:
Sink, Maker:
Sink, Size:
Pump, Maker: Delco #205 automatic electric
Pump, Size:
How Procured: Rain water from roof of dwelling
Injury Possible:
Purity Precaution: Brick filter wall
Tank Capacity: Cistern under woodshed of each dwelling- cap. 970 cu ft. each; cistern in basement of fog signal bldg.
Tank Material: Concrete, brick
Distilling Apparatus: False
Distilling Manufacturer:
Well Description:
Well Diameter:
Well Lining:
Pump or Bucket:
What Power Used:
Distance from Dwelling:
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 at low water line. Steamers cannot go alongside, small boat can go alongside at any stage of tide.
Distance and Direction: Boathouse & hoist house built on wharf with car track leading from wharf to fog signal bldg. Boathouse is 15'w x 18.5' x 22.5' long. Tram leads upgrade from wharf over trestle to shore & at pt abt 100' from wharf makes nearly rt. angle bend to right.
Miscellaneous Remarks: Shop tools - 1foot power lathe, 1 hand power drill press. Tram hoist loc. in small house at upper bend of tramway. Loaded cars are pushed by hand to fog signal bldg & oil house as ground is practically level. Derrick is stiff leg type.
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:
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:
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:

Power Boat
Engine Type: Palmer "little Husky" 4 cyl, 4 cycle 273023 HL
Horsepower: 10-15
Engine Maker: Palmer Bros., Coscob Ct.
Spare Coil:
Propeller Diameter: 12"
Propeller Pitch: 14" 3 blade

Hoisting Engines
Engine #1
Hoisting Engine Kind: Single cylinder, vertical, double drum
Engine RPMs: 350
Engine Diameter:
Engine Stroke:
Engine Boiler:
Engine Maker and Date: Fairbanks-Morse & Co.
Serial Number: 118168
Cylinders and Size: 1, 6" bore
Horsepower: 6
Fuel: Gasoline
Hoist Starter: Hand cranking
Hoist Miscellaneous: Built 1916
Engine #2
Hoisting Engine Kind: Single drum, vertical single cylinder
Engine RPMs:
Engine Diameter:
Engine Stroke:
Engine Boiler:
Engine Maker and Date: Novo
Serial Number:
Cylinders and Size: 1
Horsepower: 6
Fuel: Gasoline
Hoist Starter: Hand cranking
Hoist Miscellaneous:

General Information: Outboard motor, Johnson, 8HP, 2 cyl, alternate firing. Purchased on PRO 8830 Model KL 65
Boats on Station: