The Baltimore Harbor Light, officially Baltimore Light and historically Baltimore Harbor Lighthouse is a privately owned

caisson lighthouse A caisson lighthouse (also referred to as a sparkplug lighthouse, or bug light) is a type of lighthouse whose superstructure rests on a concrete or metal caisson. Caisson lighthouses were developed in the late nineteenth century as a cheaper alte ...

in the

Chesapeake Bay The Chesapeake Bay ( ) is the largest estuary in the United States. The Bay is located in the Mid-Atlantic (United States), Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the ...

Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean to ...

. First lit in 1908, it sits at the mouth of the

Magothy River The Magothy River runs U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 1, 2011 through Anne Arundel County in the U.S. state of Maryland. It is located south of the Patapsco River ...

, marking the channel which leads northwest to the opening of the

Patapsco River The Patapsco River mainstem is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map , accessed April 1, 2011 river in central Maryland that flows into the Chesapeake Bay. The river's tidal port ...

, which then leads into the

Baltimore harbor Helen Delich Bentley Port of Baltimore is a shipping port along the tidal basins of the three branches of the Patapsco River in Baltimore, Maryland on the upper northwest shore of the Chesapeake Bay. It is the nation's largest port facilities fo ...

. The light is located adjacent to the mouth of the

. At the time of its construction, it was the world's tallest caisson lighthouse. In June 2006, Baltimore Light was sold at auction to private owners by the

General Services Administration The General Services Administration (GSA) is an independent agency of the United States government established in 1949 to help manage and support the basic functioning of federal agencies. GSA supplies products and communications for U.S. gover ...

for $260,000; the

U.S. Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, mul ...

maintains rights to operate a light on the structure. Although a lighthouse had been requested at the site since 1890, it was not until 1904 that construction actually began. In October of that year a violent storm struck the construction site, upturning the caisson and sending it to the bottom of the Bay. The

contractor A contractor is a person or company that performs work on a contract basis. The term may refer to: Business roles * Defense contractor, arms industry which provides weapons or military goods to a government * General contractor, an individual o ...

defaulted on the work, and it was not until late in 1905 that construction could resume. The lens was finally installed and the light lit in 1908. It was the last lighthouse to be constructed on the Chesapeake. In May 1964, the Baltimore Light became the first and only American lighthouse powered by nuclear power, as a test of the SNAP-7B 60 Watt

radioisotope thermoelectric generator A radioisotope thermoelectric generator (RTG, RITEG), sometimes referred to as a radioisotope power system (RPS), is a type of nuclear battery that uses an array of thermocouples to convert the heat released by the decay of a suitable radioacti ...

. One year later the RTG was removed and a conventional electric generator was installed. Currently the lighthouse is

solar-power Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Photovoltaic cells convert light into an electric current using the photovoltaic ...

ed. The structure was added to the National Register of Historic Places as Baltimore Light Station on December 2, 2002.

Notes

References

Baltimore Harbor Lighthouse
from the Chesapeake Chapter of the

United States Lighthouse Society The United States Lighthouse Society is a non-profit organization dedicated to aiding in the restoration of American lighthouses and educating the public about their history. With four chapters, and more than a dozen affiliates, it is one of the ...

.
History of Baltimore Lighthouse
from Lighthousefriends. *

External links

*, including photo from 1991, at Maryland Historical Trust
Baltimore Harbor Light
New owners as of 2006.

{{authority control Lighthouses completed in 1908 Lighthouses on the National Register of Historic Places in Maryland Lighthouses in Anne Arundel County, Maryland National Register of Historic Places in Anne Arundel County, Maryland 1908 establishments in Maryland