Report for Michigan City Breakwater (Indiana) - 1911

General
District: 12th
Inspector: Francis J. Otter, Draftsman 9th LH District
Location: 5 yds from N'ly end of breakwater off entrance to Michigan City Harbor.
Date of Report: 11/25/1911
Latitude: 41° 43' 46" N
Longitude: 86° 54' 49" W
Premises
Site:
Date of Reservation:
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: On pier, pier about 6' above water level
Inclosures to Premises / Type of Fence:
Wharf or Landing on Premises: Pier
Road to Land or Wharf Chararacter of and Distance:
Means to Reach Light Station: Small boat from Michigan City E Pierhead 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: Concrete pedestal surmounted by concrete pyramidal shaft
Number of Separate Lights: 1
First Built or Established: Sept. 1911
Last Rebuilt, Repaired, or Renovated: Built Sept., 1911
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: 31'
Background of Lighthouse as Seen from Sea: Buildings of Michigan City
Color of Tower: Gray
Color of Tower/ How Produced: Natural color of concrete
Tower Connection: Detached, on Breakwater pier
Object of Navigation: Local navigation, to mark end of Breakwater, & as guide into Harbor.
Building Materials: Concrete
General Description:
Wall Thickness at Base:
Wall Thickness at Parapet:
Diameter at Base:
Diameter at Parapet:
Kind of Stairway and Steps: Metal rungs embedded in concrete
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:
Miscellaneous Remarks: Concrete pedestal & tank house 5' x 7' x 7' 9", surmounted by pyramidal shaft 16' high, 5' sq. at base & 2' 6" sq. at top, surmounted by 200 m/m lens lantern, AGA equipment.
Illuminating Apparatus
Kind of Apparatus:
Intensity in Candles: 50 cp
Name of Maker: American Gas Accumulator Co.
Year Made: 1911
Marks and Number:
Order of Apparatus: 1/2 c ft. burner, with sun-valve equipment
Inside Diameter:
Light Characteristic:
Time of Revolution:
Flash Interval:
Duration of Flash:
Arc of Each Fixed Part:
Number of Panels:
Number of Flash Panels:
Arc of Each:
Number of Elements in Central Drum:
Number of Prisms Above Center Drum:
Number of Prisms Below Center Drum:
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:
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:
Regulated:
Lens Protection:
How Color is Produced: By red chimney screen
Red Sectors Description:
Where Color Attached: To illuminating apparatus
Form of Colored Glass: Chimney screen around burner
Lamp Description: 1/2 ft AGA burner
Type of Illuminant: Acetylene
Number of Spare Lamps:
Number of Spare Burners:
Candle Power: 20 cp


Compressed Gas
Gas Container: A-50; 2, no spare
Compressed Gas Capacity: 177 cu ft.
Compressed Gas Charge: 150 lbs
How Supply Renewed: By new containers
At What Intervals: About 5 1/3 months allowing inc. of 40% for operation of sunvalve
Spare Containers:


Occulting Light
Characteristic: Light = 0.3 sec; Eclipse 2.7 sec.
Time Limit: Between 1/10 & 1/2
Eclipse Type: Valve, single flasher.
Size and Amplitude:
Axis Rotation:
Axis Relation:
Screen Revolution:
Screen Number:
Screen Time:
Screen Form:
Screen Mounting:
Screen Order:
Screen Date:
Valve Maker: American Gas Accumulator Co.
Valve Pattern: Dalen's patent
Reliability: Yes