Report for Mamajude Range Front Beacon (Michigan) - 1909

General
District: 10th
Inspector: Chas Bartlett, Chief Clerk & Norris Works, Supt.
Location: In 3.5' of water on Mamajude shoal, W'ly side of main channel of Detroit River, 675' N 8 degrees 19.5' E from Rear Beacon
Date of Report: 02/03/1909
Latitude: 42° 11' 36"
Longitude: 83° 08' 07"
Premises
Site: Reserved from public land by order of President of US
Date of Reservation: 11/15/1848
Date of Deed:
Date of Permission:
Date of Lease:
Area of the Entire Site:
Area Inclosed:
Character of Soil:
Distance of tower from Nearest High-Water Mark:
Inclosures to Premises / Type of Fence: None, surrounded by water
Wharf or Landing on Premises: Boat house at Rear Beacon
Road to Land or Wharf Chararacter of and Distance: Concrete walk about 675'
Means to Reach Light Station: From Rear Beacon 675' by concrete walk.
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: Tower
Number of Separate Lights: One
First Built or Established: 1894
Last Rebuilt, Repaired, or Renovated: 1904 - moved out & placed on new foundation.
Condition at This Date: Good
Shape of Tower in Plan: Square
Form of Tower: Pyramidal
Height from Base to Ventilator Ball: 23' 11"
Height of Focal Plane Above Mean High Water: 28'
Background of Lighthouse as Seen from Sea: Sky & River
Color of Tower: White
Color of Tower/ How Produced: Paint
Tower Connection: At Rear Beacon
Object of Navigation: Range light - main channel of Detroit River.
Building Materials: Wood
General Description:
Wall Thickness at Base: 10 5/8"
Wall Thickness at Parapet: 10 5/8"
Diameter at Base: 10' 2"
Diameter at Parapet: 7' 8.5"
Kind of Stairway and Steps: Wooden step ladder
Number of Landings: 1
Size of Glass: 10" x 12"
Number of Windows and Size of Sash: 2 windows; 2 sash each with 4 lights. 10" x 12"
Number of Doors:
Kind of Foundation and Depth Below Surface: 12' x 12' concrete; Foundation of walk btwn beacons is pile of rubble stone, about 14' wide at base, 4' wide at top 6' high projecting about 2' above water surface, deposited on river bottom.
Character of Soil Surrounding the Lighthouse: Surrounded by water 3' to 4' deep.
Soil Susceptibility:
Miscellaneous Remarks: Rip-rapped with limestone about tower.
Lantern and Fixtures
Order of Lantern: 5th
Shape of Lantern: Polygonal
Diameter to Glass: Radius 3' 3/8"
Diameter in the Clear:
Number of Sides: 8
Type of Bars: Vertical
Thickness of Bars:
Height Glazed: 36.5"
Number of Plates in Height: One
Number of Plates Each Side: One
Thickness of Plates: 5/16" or 3/8"
Size of Plates: 1 - 30 1/4" x 36.5"; 2 - 28 1/4" x 36.5"
Number of Storm Panes: None
Unglazed Side of Lantern: 5 = 225 degrees
What Bearings: Bearing S 75 - 49.5 W to S 59 - 10.5 E; Azimuth 255 - 49.5 to 120 - 49.5; 45 degrees each side of range line which bears S 8 degrees 19.5 W
Construction Material Lantern: Wood, with cast iron frame for glass.
Construction Material Roof / Cowl: Wood, covered with copper & with a copper cornice. Lined with zinc.
Ventilator / Cowl: Copper
Lightning Spindle: Copper spindle, with platinum point.
Description of Lightning Rod: 3/8" copper rod led down side of tower into rails.
Balustrade: Wood
Lantern Doors: 1 small, low, wooden door
Floor of Lantern: Wood
Watchroom Doors: None
Parapet Diameter: 5' 4 3/4"
Ventilators
Location / Number: 4 wooden slide ventilators
Ladders / Cleaning Arrangement: None
Curtain Hooks / Hanger: Brass, screwed into corners.
Illuminating Apparatus
Kind of Apparatus:
Intensity in Candles:
Name of Maker:
Year Made:
Marks and Number: No. 7
Order of Apparatus: 90 degree lens lantern
Inside Diameter: 11 13/16"
Light Characteristic: Fixed red
Time of Revolution:
Flash Interval:
Duration of Flash:
Arc of Each Fixed Part: 90 degrees visible 60 degrees to E'd & 30 degrees to W'd of range line, between bearing S 21 - 40.5 E to S 68 - 19.5 W; Azimuth 158 - 19.5 to 248 - 19.5; Bearing of range 8 degrees 19.5 W
Number of Panels: 1
Number of Flash Panels:
Arc of Each:
Number of Elements in Central Drum:
Number of Prisms Above Center Drum: 3
Number of Prisms Below Center Drum: 3
Does Apparatus Revolve?: False
Is There a Revolving Belt?: False
Revolving Panels:
How Flash is Produced:
Number of Vertical Elements Panel:
Fixed Lens Covered:
Pedestal: Wood
Service Table: Wooden shelf attached to pedestal
Draft Tube Description: None
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:
Regulated:
Lens Protection:
How Color is Produced: Ruby chimney
Red Sectors Description:
Where Color Attached:
Form of Colored Glass:
Lamp Description: Lens lantern lamp with 5th order burner
Type of Illuminant:
Number of Spare Lamps: 2
Number of Spare Burners: None
Candle Power:


Vapor Oil Lamp
Number of Wicks or Mantels: 1 wick
Diameter of Outside Wick: 1 1/4"
Diameter of Mantel:
Diameter of Circum Circle:
Closets and Store Rooms
Tower Closet Use:
Oil House Description: Round iron oil house at Rear Beacon is used.
Oil House Inside Dimension:
Oil House Construction Material:
Oil House Capacity:
Other (Describe):
Suitability:
Healthfulness
General Opinion: Healthful
Diseases:
Prevalency:
Local Causes:
Recommended Improvements:
Miscellaneous
Access to Lighthouse: Boathouse at Rear Beacon
Distance and Direction:
Miscellaneous Remarks: Station in good condition. Walk from Rear to Front Beacon is concrete, 1' thick 3.5' wide. 1/4" iron pipe railing extends along 1 side, with posts 3' high, 8' C.C. with hand & foot rail. Total length of walk, 588' placed Sept. 1907.