| 词条 | Concord Point Light |
| 释义 |
| name = Concord Point Light | image_name = Havre De Grace Maryland Lighthouse 600.jpg | caption = Concord Point Light | location = Concord and Lafayette Streets, Havre de Grace, Maryland | coordinates = {{coord|39|32|26.52|N|76|5|5.28|W|region:US_type:landmark|display=inline,title}} | pushpin_map = USA Maryland#USA | pushpin=lighthouse | yearbuilt = 1827 | yearlit = 1827 | automated = 1920 | yeardeactivated = 1975-1983 | foundation = | construction = Granite | shape = Conical | marking = Whitewash | height = {{convert|36|ft}} | elevation = | lens = Sixth-order Fresnel lens | currentlens = Fifth-order Fresnel lens | intensity = | range = | characteristic = Fixed white | ARLHS = USA-186[1][2] |module={{Infobox NRHP | name = Havre de Grace Lighthouse | embed = yes | nrhp_type = | image = | caption = | architect = John Donohoo | architecture = | added = April 2, 1976 | area = {{convert|0.1|acre}} | governing_body = United States Coast Guard | refnum = 76000999[3] }} Concord Point Light is a lighthouse in Havre de Grace, Maryland, United States, overlooking the point where the Susquehanna River flows into the Chesapeake Bay, an area of increasing navigational traffic at the time it was constructed in 1827. It was built by John Donahoo, who built many lighthouses in Maryland.[4] It is the northernmost lighthouse on the Chesapeake Bay. DescriptionConcord Point Light is a {{convert|36|ft|adj=on}} tower that was built in 1827. It is the second oldest tower lighthouse still standing on the Chesapeake Bay. The lighthouse is constructed of Port Deposit granite. The walls are {{convert|31|in}} thick at the base and narrow to {{convert|18|in}} at the parapet. John Donahoo also built the keeper's house across the street.[5] The lantern was originally lit with 9 whale oil lamps with {{convert|16|in|adj=on}} tin reflectors. In 1854, a sixth-order Fresnel lens was installed. This was later upgraded to a fifth-order Fresnel lens. The lighthouse was automated in 1920. HistorySeveral members of the O'Neill family served as keepers at Concord Point from 1827 to the mid-1900s. There were other keepers not related to the O'Neills who served as well. The first O'Neill, John, defended the town of Havre de Grace by manning a cannon battery on Concord Point during the War of 1812. Local documents describe the lighthouse area as being "seriously blighted" by 1924, and apparently remained that way for many years. The lighthouse was decommissioned by the Coast Guard in 1975 and soon after that the lens was stolen. The structure was added to the National Register of Historic Places in 1976. Extensive restoration work began in 1979, the keeper's house has since been restored, and is open to the public as a museum. The lantern room of the tower now has a new fifth-order Fresnel lens on loan from the coast guard that was installed in 1983. Concord Point Light is currently listed as a private aid to navigation.[6] See also{{stack|{{portal||National Register of Historic Places|Lighthouses}}}}
References1. ^{{cite uscghist|MD}} 2. ^{{cite rowlett|md}} 3. ^{{NRISref|2009a}} 4. ^{{cite web |url=http://www.lhdigest.com/Digest/StoryPage.cfm?StoryKey=1004 |first=William Q. |last=Simms |title=Two Lights on the Hill |publisher=Lighthouse Digest |date= April 2001 |accessdate=2006-12-28}} 5. ^{{cite web|url=https://mht.maryland.gov/secure/medusa/PDF/NR_PDFs/NR-363.pdf |title=National Register of Historic Places Registration: Havre de Grace Lighthouse|date=November 1975|accessdate=2016-01-01 |author=W. M. Whittington |publisher=Maryland Historical Trust}} 6. ^{{cite web|url=http://www.lighthousefriends.com/light.asp?ID=411|title=Concord Point Lighthouse|work=Lighthouse Friends|accessdate=September 19, 2017}} External links{{stack|{{commons category|Concord Point Light}}}}
9 : Lighthouses completed in 1827|Towers completed in 1827|Lighthouses on the National Register of Historic Places in Maryland|Museums in Harford County, Maryland|Lighthouse museums in Maryland|Transportation buildings and structures in Harford County, Maryland|Buildings and structures in Havre de Grace, Maryland|National Register of Historic Places in Harford County, Maryland|1827 establishments in Maryland |
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