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25-781: The company started life in 1920 as the Globe Shipbuilding and Dry Dock Company of Maryland . Its president at this time was B. C. Cooke. The company bought land along the Patapsco River across the Bay from Fort McHenry . It later changed its name to the simpler "Maryland Drydock Company". Sometime after 1950, its name was changed again, to the Maryland Shipbuilding and Drydock Company . Maryland Drydock specialized in ship conversions, upgrades and repairs rather than with shipbuilding per se. During World War II ,

50-695: A watershed (including the water surface) of 950 square miles (2,460 km ). The removal of Bloede's Dam in September 2018, opened up 65 miles (105 km) of the Patapsco River watershed, which will potentially restore spawning runs of at least six species of native anadromous fish: alewife ( Alosa pseudoharengus ), blueback herring ( Alosa aestivalis ), American shad ( Alosa sapidissima ), hickory shad ( Alosa mediocris ), striped bass ( Morone saxatilis ), sea lamprey ( Petromyzon marinus ), as only one species, sea lamprey, were found using

75-504: A 1.75 acres (7,100 m ) pond in the 1950s, filled by seven spring heads that form the headwaters of the South Branch of the Patapsco River. Beginning in the 1770s, the Patapsco River became the center of Maryland industrialization. Milling and manufacturing operations abounded along the river throughout the eighteenth and nineteenth centuries, generally powered by small dams. The Baltimore and Ohio Railroad 's original main line

100-403: A nearly complete barrier to anadromous fish passage. Although a fish ladder was installed in 1992, it blocked five of six native fish species trying to run upstream to spawn. Efforts to remove Bloede's Dam began in the 1980s when nine drowning deaths occurred, and also to restore fish passage to a large portion of the Patapsco River watershed. Dam demolition began on September 12, 2018, opening

125-648: Is a 39-mile (63 km) river in central Maryland that flows into the Chesapeake Bay . The river's tidal portion forms the harbor for the city of Baltimore . With its South Branch, the Patapsco forms the northern border of Howard County, Maryland . The name "Patapsco" is derived from the Algonquian pota-psk-ut , which translates to "backwater" or "tide covered with froth". Captain John Smith

150-411: Is possible in areas of the Patapsco River, sometimes involving rope swings, inner tubing, and wading. The river also serves as a venue for rafting. The Patapsco is also great for fishing. The MD DNR stocks parts of Patapsco State Park in the early spring and offers some pretty decent trout fishing. The Northern Snakehead has also made the Patapsco their home. They can be found from historic Ellicott City to

175-530: Is subject to extensive stormwater runoff and other forms of water pollution . The Maryland Department of the Environment has identified the Lower North Branch as containing high levels of heavy metals ( chromium , arsenic , cadmium , copper , mercury , nickel , lead , selenium , and zinc ), as well as phosphorus , fecal coliform bacteria , and PCBs . The Piney Run Reservoir on

200-524: The Baltimore area , affected low-lying areas of the Patapsco and Jones Falls valleys. The storm caused significant damage to the historic downtown area of Ellicott City , Maryland . On the evening of July 30, a severe thunderstorm moved into the area of Ellicott City where it dumped an estimated 6 inches (15 cm) of rain in two hours. The flash flood that resulted inflicted severe damage to

225-577: The Bloede's Dam fish ladder in 2012. One catadromous species would likely also benefit, the American eel ( Anguilla rostrata ), a fish species that lives in freshwater and migrates to the ocean to breed. The Bloede's Dam removal project was led by American Rivers and the Maryland Department of Natural Resources . Now that Bloede's Dam has been removed, removal of Daniels Dam upstream on

250-480: The Patapsco River, was struck by a container ship and partially collapsed into the river. The 19.4-mile-long (31.2 km) South Branch rises at Parr's Spring, where Howard County , Carroll , Frederick , and Montgomery counties meet. The latter begins at elevation 780 feet (240 m) on Parr's Ridge , just south of Interstate 70 and east of Ridge Road ( Highway 27 ), 2 miles (3 km) south of Mount Airy, Maryland . The South Branch Patapsco River traces

275-447: The Patapsco is a minor river flowing mostly through a narrow valley. Patapsco Valley State Park extends along 32 miles (51 km) of the Patapsco and its branches, encompassing 14,000 acres (5,700 ha) in five areas. The river cuts a gorge 100 to 200 feet (35–70 m) deep within the park, with rocky cliffs and tributary waterfalls. The last 10 miles (16 km), form a large tidal estuary inlet of Chesapeake Bay . Two lobes of

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300-514: The South Branch of the Patapsco is polluted by excess levels of phosphorus and sediment. Environmental nonprofit organizations, such as The Friends of Patapsco Valley & Heritage Greenway, Inc. (PHG), lead clean-up efforts by the residents of surrounding communities. From 2006 to 2012, PHG volunteers participated in 183 stream clean-ups, removing 264 tons of trash from the streams of the Patapsco Valley watershed. Recreational swimming

325-489: The area primarily on Main Street ( Maryland Route 144 ). Flooding damaged many homes, businesses, sidewalks, and landmarks, including the city's landmark clock. Maryland Governor Larry Hogan declared a state of emergency and at least two people were confirmed to have died (Jessica Watsula, 35, and Joseph A. Blevins, 38). Main Street remained closed for more than two months as businesses and residents cleaned up from

350-587: The company was employed in the conversion of numerous warships built at other yards for the US war effort. Unlike many other shipbuilding companies of the period, it survived the postwar downturn in the shipbuilding industry. In 1970, the company's yard in Baltimore was purchased by the Fruehauf Trailer Corporation which spent $ 30 million upgrading the site. Adverse economic conditions caused

375-408: The fishery and creating a rocky rapid for kayaking. Two dams upstream of Bloede's Dam, Simkins and Union, were removed in 2010. The removal of Bloede's Dam leaves Daniels Dam, 9 miles (14 km) upstream, as the last remaining dam along the mainstem Patapsco River. In the early hours of March 26, 2024, the 1.6-mile-long (2.6 km) Francis Scott Key Bridge , which carried Interstate 695 over

400-692: The harbor deviate from the "mainstem" harbor: the Middle Branch Patapsco River, into which Gwynns Falls ; and the Northwest Branch Patapsco River, into which Jones Falls flows. The inner part of this estuary provides the harbor of Baltimore . Thoms Cove is further down the main harbor. The Patapsco estuary is south of the Back River and north of the Magothy River . The Patapsco has

425-573: The harbor. This is a list of all crossings of the main stem of the Patapsco River, as well as its two downstream short branches, the Middle Branch and Northwest Branch. Listings start downstream and continue upstream to the sources of the rivers. [REDACTED] I-395 2016 Maryland flood The 2016 Maryland flood was a natural disaster in the United States that took place on July 30, 2016. The flooding, which occurred in

450-631: The mainstem Patapsco River would open to anadromous fishes the remaining 6.5 miles (10.5 km) of Patapsco River mainstem, the entire 19.4 miles (31.2 km) length of the South Branch Patapsco River, 3.5 miles (5.6 km) of the North Branch Patapsco River up to the Liberty Dam , and many of these rivers' tributaries. The eastern portion of the Patapsco River is in a highly urbanized area and

475-564: The mouth. The first land record regarding Parr's Springs, the source of the South Branch, dates from 1744, when John Parr laid out a 200 acres (81 ha) tract he called Parr's Range. During the Civil War, Parr's Spring was a stop for the Army of the Potomac 's Brig. Gen. David M. Gregg 's cavalry, on June 29, 1863, while en route to Gettysburg, Pennsylvania . Parr's Spring was dug to form

500-585: The shops of Ellicott City. A 1956 flood severely damaged the Bartigis Brothers plant . In 1972, rainfall from the remnants of Hurricane Agnes damaged Ellicott City and the Old Main Line. Two died in the July 2016 Maryland flood ravaged Main Street, followed two years later by a May 2018 Maryland flood that took the life of a rescuer. The mouth of the Patapsco River forms Baltimore Harbor,

525-678: The site of the Battle of Baltimore during the War of 1812 . This is where Francis Scott Key , aboard the British HMS ; Tonnant , wrote " The Star-Spangled Banner ", a poem later set to music as the national anthem of the United States. Today, a red, white, and blue buoy marks where the ship was anchored. Bloede's Dam , a hydroelectric dam built in 1906, was on the Patapsco River within Patapsco Valley State Park ,

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550-733: The southern boundary of Carroll County and the northern boundary of Howard County . The North Branch flows 20.9 miles (33.6 km) southward from its origins in Carroll County. Liberty Dam and its reservoir on the North Branch are major components of the Baltimore City water system. The Patapsco River mainstem begins at the confluence of the North and South Branches, near Marriottsville , about 15 miles (24 km) west of downtown Baltimore. Through most of its length,

575-461: The yard to close in 1984 and much of the site was razed, although one drydock was preserved and was being used by Kurt Metal for the scrapping of old ships in 1995. Not counting the many vessels "jumbosized" there, a total of at least eighteen vessels were built during the shipyard's history. This is an incomplete list. Patapsco River The Patapsco River ( / p ə ˈ t æ p ˌ s k oʊ / pə- TAP -skoh ) mainstem

600-623: Was constructed in 1829 west along the Patapsco Valley; the nation's first railroad, the route remains, though much altered. Many railroad bridges were built in the valley, including the Thomas Viaduct , which is still in use, and the Patterson Viaduct , now in ruins. The 1907 hydropower Bloede's Dam powered flour mills. An 1868 flood washed away 14 houses and killed 39 people around Ellicott City . A 1923 flood topped bridges. In 1952, an 8 ft (2.4 m) wall of water swept

625-468: Was the first European to explore the river, noting it on his 1612 map as the Bolus River. The "Red river", named after the clay color, is considered the "old Bolus", as other branches were also labeled Bolus on maps. As the river was not navigable beyond Elkridge, it was not a significant path of commerce; in 1723, only one ship was listed as serving the northern branch, and four others operating around

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