Report for Blakistone Island Light Station (Maryland) - 1909

District: 5th
Inspector: Jon Murdoch, Asst. Lighthouse Engineer
Location: S'ly end of Blakistone Island, off the entrance to St. Clement, N'ly side of Potomac River
Date of Report: 10/14/1909
Latitude: 38° 12' 27"
Longitude: 76° 44' 43"
Site: Purchase
Date of Reservation:
Date of Deed: 04/27/1850
Date of Permission:
Date of Lease:
Area of the Entire Site: 2 A. 3 R. 23 p. 32 1.
Area Inclosed: 1/2 acre
Character of Soil: Loam
Distance of tower from Nearest High-Water Mark: 60'
Inclosures to Premises / Type of Fence: Wooden fence
Wharf or Landing on Premises: None
Road to Land or Wharf Chararacter of and Distance: No road, distance 30'
Means to Reach Light Station: By small boat
Distance to Nearest Road: 1 1/4 miles to steamboat landing at Goltons.
Distance to Post Office: 1 1/4 miles
Distance to Village: 10 miles
Facilities for Public Conveyance: None
Facilities for Private Conveyance: Small boat, 1 mile
Means Used for Support of Lantern: Tower
Number of Separate Lights: One
First Built or Established: 1851
Last Rebuilt, Repaired, or Renovated: September, 1905
Condition at This Date: Good
Shape of Tower in Plan: Circular (in center of brick dwelling)
Form of Tower: Cylindrical
Height from Base to Ventilator Ball: 53' 6"
Height of Focal Plane Above Mean High Water: 44' 6"
Background of Lighthouse as Seen from Sea: Woods
Color of Tower: White
Color of Tower/ How Produced: By whitewash
Tower Connection: Tower connected with Keepers' dwelling, by brick walls.
Object of Navigation: General purposes
Building Materials: Brick
General Description:
Wall Thickness at Base: 2'
Wall Thickness at Parapet: 9"
Diameter at Base: 8'
Diameter at Parapet: 6'
Kind of Stairway and Steps: Wood
Number of Landings: 5
Size of Glass: 9" x 12"
Number of Windows and Size of Sash: 1, 2' 8" wide, 5' 0" high
Number of Doors: 13
Kind of Foundation and Depth Below Surface: Brick, 5'
Character of Soil Surrounding the Lighthouse: Loam
Soil Susceptibility: Yes
Miscellaneous Remarks:
Lantern and Fixtures
Order of Lantern: 4th
Shape of Lantern: Polygonal
Diameter to Glass: 7' 0"
Diameter in the Clear:
Number of Sides: 9
Type of Bars: Vertical
Thickness of Bars:
Height Glazed: 36"
Number of Plates in Height: One
Number of Plates Each Side: One
Thickness of Plates: 3/8"
Size of Plates: 36" x 27 1/2"
Number of Storm Panes: None
Unglazed Side of Lantern: None
What Bearings:
Construction Material Lantern: Iron & copper; parapet brick.
Construction Material Roof / Cowl: Copper
Ventilator / Cowl: Copper
Lightning Spindle: Brass
Description of Lightning Rod: Copper, attached to base of lantern, led over roof to side of dwelling & to ground.
Balustrade: Iron
Lantern Doors: Fitted with hinges to frame of lantern
Floor of Lantern: Wood, covered with sheet copper
Watchroom Doors: In floor of lantern, with hinges.
Parapet Diameter:
Location / Number: Lower part of lantern
Ladders / Cleaning Arrangement: None
Curtain Hooks / Hanger: Screwed into frame of lantern.
Illuminating Apparatus
Kind of Apparatus:
Intensity in Candles:
Name of Maker: L. Sautter, Paris
Year Made: Not known
Marks and Number: None
Order of Apparatus: 4th
Inside Diameter: 19.5"
Light Characteristic: Fixed white with a fixed red sector
Time of Revolution:
Flash Interval:
Duration of Flash:
Arc of Each Fixed Part:
Number of Panels: 4
Number of Flash Panels: None
Arc of Each:
Number of Elements in Central Drum: 5
Number of Prisms Above Center Drum: 5
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: Iron
Service Table: Iron
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:
Lens Protection:
How Color is Produced: By ruby glass
Red Sectors Description: Between 221 degrees 30' true (SW 1/8 W, mag) & 267 degrees 20' true (W 1/4 N mag.)
Where Color Attached: To lantern
Form of Colored Glass:
Lamp Description: Constant level, one-wick
Type of Illuminant:
Number of Spare Lamps: One
Number of Spare Burners: None
Candle Power:
Closets and Store Rooms
Tower Closet Use: Fitted with shelves, for eneral purposes.
Oil House Description: Oil kept on 3rd floor of dwelling, in small pans.
Oil House Inside Dimension:
Oil House Construction Material:
Oil House Capacity:
Other (Describe): 3 between tower & outer wall used for general purposes.
Suitability: Dry & suitable
Fog Signal General
Fog Signal Kind: Stevens Bell machine
Time to Start: 1 minute
How Long Will Pressure Last:
Manufacturer: Boston, Mass., Geo. M. Stevens Co.
Year of Manufacture: Not known
Characteristic: A single blow every 16 secs.
Duplication: None
Timing Device:
If whistle, siren, or trumpet, Pressure at Which Blown:
Height Above Water:
Compass Direction:
Location: Detached from lighthouse
Distance and Direction: SW 25'
Water Supply: None required
Reached from Lighthouse: By boardwalk
Description of Fog Signal Building: Wooden pyramidal structure, 20' 6" high, 12' square at base & 9' square at top.
Pressure And Recording Gauge:
Bell Signal
Weight: 1000 lbs
Metal: Bell metal
Diameter: 38"
Height: 28"
Time: 2 3/4 hours
Manufacturer: Geo. M. Stevens Co.
Weights for Operation:
Location: Connected to tower, the 2 forming practically 1 structure
Coloring: White
Construction Materials: Brick & wood
Number of Rooms: 6
Number of Dwellings:
Heating Plant:
Number of Keepers: 1
Furnished Quarters:
NOT Furnished Quarters:
Outhouses: Kitchen & pumphouse
Outhouse Coloring: White
Paths and Walks: Brick walk between dwelling & summer kitchen & in front of dwelling
Area Inclosed: Post & rail fence
Area of Garden: None
Area Timber or Shrubbery: None
Cultivation Area Available: None
Area Cultivated: None
Character of Surroundings: Loam
Stove, Maker:
Stove, Size:
Sink, Maker:
Sink, Size:
Pump, Maker:
Pump, Size:
How Procured: Well
Quality: Good
Quantity: Ample
Injury Possible: Not liable
Purity Precaution:
Tank Capacity:
Tank Material:
Distilling Apparatus: False
Distilling Manufacturer:
Well Description: 14'
Well Diameter: 5'
Well Lining: Wood curbing
Pump or Bucket: Pump
What Power Used:
Distance from Dwelling: 20'
General Opinion: Healthy
Diseases: Malarial
Prevalency: Spring & fall
Local Causes:
Recommended Improvements: