Report for Derby Wharf (Massachusetts) - 1910

District: 2nd
Inspector: Lieut. Col. Edw Burr, Engineer 2nd Lighthouse Dist
Location: On the outer end of Derby Wharf, Mass. W'ly side of Salem Harbor.
Date of Report: 02/21/1910
Latitude: 42° 31' 00" N
Longitude: 70° 53' 03" W
Site: Purchase
Date of Reservation:
Date of Deed: 10/03/1870
Date of Permission:
Date of Lease:
Area of the Entire Site: 1196.5'
Area Inclosed: None
Character of Soil:
Distance of tower from Nearest High-Water Mark: About 5'
Inclosures to Premises / Type of Fence: None
Wharf or Landing on Premises:
Road to Land or Wharf Chararacter of and Distance:
Means to Reach Light Station: Street car
Distance to Nearest Road: RR station about 1 mile - Salem
Distance to Post Office: About 1 mile - Salem
Distance to Village: In City of Salem
Facilities for Public Conveyance: Electric cars to head of wharf about 1/4 mile from light
Facilities for Private Conveyance: Carriage from RR station.
Means Used for Support of Lantern: Tower
Number of Separate Lights: One
First Built or Established: 1871
Last Rebuilt, Repaired, or Renovated:
Condition at This Date: Good
Shape of Tower in Plan: Square
Form of Tower: Pyramidal
Height from Base to Ventilator Ball: 22.5'
Height of Focal Plane Above Mean High Water: 25'
Background of Lighthouse as Seen from Sea: City of Salem
Color of Tower: Red
Color of Tower/ How Produced: Paint
Tower Connection:
Object of Navigation:
Building Materials: Brick
General Description:
Wall Thickness at Base: 12"
Wall Thickness at Parapet: 12"
Diameter at Base: 12' square
Diameter at Parapet: 12' square
Kind of Stairway and Steps: Wooden ladder
Number of Landings: 1
Size of Glass: 9" circular
Number of Windows and Size of Sash: 1 - 9" diam.
Number of Doors: 1
Kind of Foundation and Depth Below Surface: Concrete about 4'
Character of Soil Surrounding the Lighthouse: Stone & earth
Soil Susceptibility: No
Miscellaneous Remarks:
Lantern and Fixtures
Order of Lantern: 6th
Shape of Lantern: Polygonal
Diameter to Glass: 7' 6"
Diameter in the Clear: 7'
Number of Sides: 8
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: 1/4"
Size of Plates: 30" x 36"
Number of Storm Panes:
Unglazed Side of Lantern:
What Bearings:
Construction Material Lantern: Iron & brass
Construction Material Roof / Cowl: Iron
Ventilator / Cowl: Iron
Lightning Spindle: Yes
Description of Lightning Rod: From lantern gallery deck down tower through foundation to low water level
Balustrade: Iron posts with 3 iron rails & iron balusters
Lantern Doors: Iron, fitted with brass hinges & lock
Floor of Lantern: Iron
Watchroom Doors: Iron door in lantern floor, fitted with brass hinges & iron lift
Parapet Diameter: 6' 7.5"
Location / Number: Parapet
Ladders / Cleaning Arrangement: None
Curtain Hooks / Hanger: Spring roller curtains

How is Watchroom Fitted: Closet for chimneys etc.; desk, chair & clock
How is Relief Called:
Where is Call System Led:
Illuminating Apparatus
Kind of Apparatus:
Intensity in Candles:
Name of Maker: Not known
Year Made: Not known
Marks and Number:
Order of Apparatus: 6th
Inside Diameter: 11 3/4"
Light Characteristic: Fixed red
Time of Revolution:
Flash Interval:
Duration of Flash:
Arc of Each Fixed Part: 90 degrees
Number of Panels: 4 (3 glass, 1 open)
Number of Flash Panels:
Arc of Each:
Number of Elements in Central Drum: 7
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: Iron
Service Table: In tower
Draft Tube Description: Cone only
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 red lamp chimney
Red Sectors Description:
Where Color Attached:
Form of Colored Glass:
Lamp Description: 4th order improved, 1 wick
Type of Illuminant:
Number of Spare Lamps: One
Number of Spare Burners:
Candle Power:
Closets and Store Rooms
Tower Closet Use: In tower for storage of paint etc.
Oil House Description: Oil stored in tower
Oil House Inside Dimension:
Oil House Construction Material:
Oil House Capacity:
Other (Describe):
General Opinion: Healthful
Local Causes: No
Recommended Improvements: No
Access to Lighthouse:
Distance and Direction:
Miscellaneous Remarks: Premises, tower & illuminating apparatus are in good condition.