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CAPE ANN LIGHT (TWIN LIGHTS)

State: MASSACHUSETTS
Location: THACHER ISLAND
Nearest City: ROCKPORT
County: ESSEX
U.S.C.G. District: 1
Year Station Established: 1771


Cape Ann Light (Twin Lights)
NPS photo by Candace Clifford, 1989
Existing Historic South Tower:
  • Year Light First Lit: 1861
  • Is the Light Operational? YES
  • Date Deactivated: N/A
  • Automated: 1979
  • Foundation Materials: GRANITE (SURFACE ROCK)
  • Construction Materials: CUT GRANITE
  • Markings/Patterns: NATURAL
  • Shape: CONICAL
  • Relationship to Other Structures: SEPARATE
  • Tower Height: 124
  • Original Optic: FIRST ORDER, FRESNEL
  • Year Original Lens Installed: 1861
  • Present Optic: VRB-25, SOLAR POWERED
  • Year Present Lens Installed: 1998
  • Height of Focal Plane: 166
  • Fresnel Lens Disposition: FRESNEL LENS AT COAST GUARD MUSEUM, NEW LONDON
  • Has tower been moved? NO
Existing Historic North Tower:
  • Year Light First Lit: 1861
  • Is the Light Operational? YES (PRIVATE AID TO NAVIGATION)
  • Date Deactivated: 1932-1988
  • Automated:
  • Foundation Materials: SURFACE ROCK
  • Construction Materials: GRANITE
  • Markings/Patterns: UNPAINTED GRANITE
  • Shape: CONICAL
  • Relationship to Other Structures: SEPARATE
  • Tower Height: 124
  • Original Optic: FIRST ORDER, FRESNEL
  • Year Original Lens Installed: 1861
  • Present Optic: 200 MM YELLOW FIXED
  • Year Present Lens Installed: 1988
  • Height of Focal Plane: 166
  • Fresnel Lens Disposition: FRESNEL LENS DESTROYED
  • Has tower been moved? NO
Previous Tower(s):
  • 1. Construction Date: 1771
  • Description: 45 FEET HIGH, ORIGINALLY BUILT OF WOOD, RENOVATED 1828, 1841, STONE MAY HAVE BEEN USED IN RENOVATIONS Fate/Disposition: DETERIORATED
Modern Tower? NO

Existing Sound Signal Building? YES, DAMAGED 1991
  • Year Constructed:
  • Construction Materials: WHITE PAINTED BRICK
  • Architectural Style: WHISTLE HOUSE
  • Fog Signal Type: FA-232/ORIG. WHISTLE, DIAPHONE
Existing Keepers Quarters? YES, MODIFIED
  • Year Constructed: 1816
  • Number of Stories: 2.5
  • Architectural Style: GREEK REVIVAL (?)
  • Construction Materials: PAINTED WHITE BRICK
Other Structures: BRICK OIL HOUSE, ELECTRIC HOUSE (1902?), BOATHOUSE (REBUILT 1991), RAMP (DAMAGED IN 1995), CISTERN, FORMER KEEPERS (USED FOR STORAGE), STONE FOUNDATION OF NORTH TOWER'S KEEPERS, RAILWAY, HELICOPTER PAD (1987), SOLAR PANEL STRUCTURE

Current Use: ACTIVE AID TO NAVIGATION

Owner/Manager: TOWN OF ROCKPORT (USCG ACCESS TO OPTIC)

Open to the Public? NO

Web Site:

National Register Status: PART OF LISTING; Reference #71000355
Name of Listing: TWIN LIGHTS HISTORIC DISTRICT
On State List/Inventory? YES; Year Listed: 1970

NATIONAL HISTORIC LANDMARK

Miscellaneous:
ONE OF FEW TWIN TOWER STATIONS ORIGINALLY CONSTRUCTED 1771, ESTABLISHED BY MASSACHUSETTS COLONY 1773; BOATHOUSE DAMAGED IN 1991 STORM; REPAIRED BY VOLUNTEERS SAME YEAR



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Last Modified: Fri, Apr 5 2002 2:08:02 pm EDT
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