Catonsville is a census-designated place (CDP) in Baltimore County, Maryland. The population was 41,567 at the 2010 census. The community lies to the west of Baltimore along the city's border. Catonsville contains the majority of the University of Maryland, Baltimore County (UMBC), a major public research university with close to 14,000 students.
Elkridge is an unincorporated community and census-designated place (CDP) in Howard County, Maryland, United States. The population was 15,593 at the 2010 census. Founded early in the 18th century, Elkridge is adjacent to two other counties, Anne Arundel and Baltimore.
Ellicott City is an unincorporated community and census-designated place in, and the county seat of, Howard County, Maryland, United States. Part of the Baltimore metropolitan area, its population was 65,834 at the 2010 census, making it the most populous unincorporated county seat in the country.
The Patapsco River mainstem is a 39-mile-long (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."
Oella is a mill town on the Patapsco River in western Baltimore County, Maryland, United States, located between Catonsville and Ellicott City. It is a 19th-century village of millworkers' homes.
Maryland Route 103 is a state highway in the U.S. state of Maryland. The state highway runs 8.29 miles (13.34 km) from St. Johns Lane in Ellicott City east to Parkway Drive South in Hanover. MD 103 serves as the local complement to MD 100 from Ellicott City in northeastern Howard County through Dorsey to Hanover in northwestern Anne Arundel County. The state highway was constructed from U.S. Route 1 in Elkridge to US 29 in Ellicott City in the 1920s. MD 103's eastern terminus was relocated from Elkridge to US 1 near Dorsey in 1956. When MD 100 was constructed between Glen Burnie and Ellicott City in the 1990s, the state highway was extended to its present western and eastern termini. MD 103 replaced MD 176 from US 1 east to near MD 295.
The Thomas Viaduct spans the Patapsco River and Patapsco Valley between Relay, Maryland and Elkridge, Maryland, USA. It was commissioned by the Baltimore and Ohio Railroad (B&O); built between July 4, 1833, and July 4, 1835; and named for Philip E. Thomas, the company's first president. Some claim it to be the world's oldest multiple arched stone railroad bridge. However, the Sankey Viaduct on the Liverpool and Manchester Railway was opened in 1830, and finally completed in 1833.
The Patterson Viaduct was built by the Baltimore and Ohio Railroad (B&O) as part of its Old Main Line during May to December 1829. The viaduct spanned the Patapsco River at Ilchester, Maryland. It was heavily damaged by a flood in 1868 and subsequently replaced with other structures.
Maryland Route 144 is a collection of state highways in the U.S. state of Maryland. These highways are sections of old alignment of U.S. Route 40 between Cumberland and Baltimore. Along with US 40 Scenic, US 40 Alternate, and a few sections of county-maintained highway, MD 144 is assigned to what was once the main highway between the two cities, connecting those endpoints with Hancock, Hagerstown, Frederick, New Market, Mount Airy, Ellicott City, and Catonsville. MD 144 has seven disjoint sections of mainline highway that pass through the Appalachian Mountains in Allegany and Washington counties and the rolling Piedmont of Frederick, Carroll, Howard, and Baltimore counties.
The Old Main Line Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland. The line runs from Relay west to Point of Rocks, and was once the main line of the Baltimore and Ohio Railroad, one of the oldest rail lines in the United States. At its east end, it has junctions with the Capital Subdivision and the Baltimore Terminal Subdivision; its west end has a junction with the Metropolitan Subdivision.
Ilchester is an unincorporated community and census-designated place in Howard County, Maryland, United States. The population was 23,476 at the 2010 census. It was named after the village of Ilchester in the English county of Somerset.
Patapsco Valley State Park is a Maryland state park extending along 32 miles (51 km) of the Patapsco River south and west of the city of Baltimore, Maryland. The park encompasses multiple developed areas on over 14,000 acres (5,700 ha) acres of land, making it Maryland's largest state park. In 2006, it was officially celebrated as Maryland's first state park, its first formation being in 1906. Patapsco Valley State Park is managed by the Maryland Department of Natural Resources.
The Historical Ellicott City/Baltimore Trolley Line #9 Trail is a 1.25-mile (2.0 km) trail in western Baltimore County, Maryland. It begins at the west end of Edmondson Avenue and extends from Catonsville through Oella to Main Street, Ellicott City. The trail follows what was originally part of the Catonsville and Ellicott City Electric Railway Company trolley line that shuttled passengers between Ellicott City and Baltimore from the late 1890s to the mid-1950s.
The Elkridge Furnace Complex is a historic iron works located on approximately 16 acres (6.5 ha) at Elkridge, Howard County, Maryland.
The Orange Grove Flour Mill was a flour mill established in 1856. It was one of the leading flour mills in the Mid-Atlantic states until it was destroyed in a fire in 1905.
The Hockley Forge and Mill are a collection of colonial-era industrial buildings along the Patapsco River near modern Elkridge, Maryland. Located at the river's head of navigation, the site is a flat section of land along the Patapsco River valley with steep embankments on either side. At its 19th-century peak, the site held more than 30 industrial buildings.
Elkridge Landing was a Patapsco River seaport in Maryland, and is now part of Elkridge, Maryland. The historic Elkridge Furnace Inn site resides within the Patapsco Valley State Park.
The Grist Mill Trail is a 5.0 mile long hiking and biking trail located in Patapsco Valley State Park in the Baltimore County side of the Patapsco Valley near Catonsville, Maryland. The paved pathway runs parallel to the Baltimore and Ohio Railroad to the north, and the Patapsco River to the south.
In the afternoon of May 27, 2018, after over 8 inches (20 cm) of rain in a span of two hours, the historic Main Street in Ellicott City, Maryland was flooded, just before the new flood emergency alert system was supposed to become operational. Flooding occurred throughout the Patapsco Valley, in the adjacent communities of Catonsville, Arbutus, and Elkridge, as well as the Jones Falls Valley in Baltimore.
