Simpson Tunnel

Redstone Township is a township in Fayette County, Pennsylvania, United States. The population was 5,077 at the 2020 census, a decline from the figure of 5,566 tabulated in 2010. The Brownsville Area School District serves the region. Communities in the township include Rowes Run, Republic, Allison, Chestnut Ridge, Fairbank, Cardale, Royal, Merrittstown, Herbert, and a small portion of Grindstone.

The Thomas H. Thompson House, also known as Wayside Manor, is an historic, American home that is located in Brownsville, Fayette County, Pennsylvania. It was added to the National Register of Historic Places in 1995.

Brown-Moore Blacksmith Shop is a historic blacksmith shop located at Luzerne Township, Fayette County, Pennsylvania. The shop began operation in 1822, and remained open until 1939. It is a rectangular brick building with a corrugated metal roof. It has a rectangular wood frame wagon shop addition rebuilt in 1919 after a fire. The shop has two large stone, hand-operated forges.It was added to the National Register of Historic Places in 1992.

Brownsville is a borough in Fayette County, Pennsylvania, United States, first settled in 1785 as the site of a trading post a few years after the defeat of the Iroquois enabled a resumption of westward migration after the Revolutionary War. The trading post soon became a tavern and inn and was receiving emigrants heading west, as it was located above the cut bank overlooking the first ford that could be reached to those descending from the Allegheny Mountains. Brownsville is located 40 miles (64 km) south of Pittsburgh along the east bank of the Monongahela River. According to the United States Census Bureau, the borough of Brownsville has a total area of 1.1 square miles (2.8 km2), of which 0.97 square miles (2.5 km2) is land and 0.1 square miles (0.3 km2), or 10.47%, is water—most of which is the Fayette County half of the Monongahela River between the community and the flatter lands of West Brownsville on the opposite shore in Washington County. As a community, the town is the central population center for a number of outlying hamlets geographically tied to the town for the same reasons they were founded nearby: western Pennsylvania has far more hills and steep slopes than flats or gentle sloping terrains suitable for settlement. This keeps Brownsville at the nexus of the transportation infrastructure which grew up during its history. While no longer a passenger depot, Brownsville and West Brownsville share an important railway bridge, creating a balloon loop that allows the turning of complete coal trains. The limited-access toll road PA Route 43 connects the town to strategic points and southern Pittsburgh at Clairton. PA Route 88, hugging the river, connects to towns up and down the Monongahela Valley. The historic National Road (now U.S. Route 40) reached East Saint Louis, Illinois, and connected the town to the immigrants arriving in the port of Baltimore traveling west on the Cumberland Turnpike and the National Road. From its founding, well into the 19th century, as the first reachable population center west of the Alleghenies barrier range on the Mississippi watershed, the borough quickly grew into an industrial center, market town, transportation hub, outfitting center, and riverboat-building powerhouse. As a trading post, it was a gateway destination for emigrants heading west to the Ohio Country and the new United States' Northwest Territory, and later for travelers heading westwards on the various Emigrant Trails both to the Near West and later the Far West. As an outfitting center, the borough provided the markets for the small-scale industries in the surrounding counties, as well as for Maryland shipping goods over the pass by mule train via the Cumberland Narrows toll route. Brownsville became a major center for building steamboats through the 19th century, producing 3,000 boats by 1888. The borough developed in the late 19th century as a railroad yard and coking center, with other industries related to the rise of steel in the Pittsburgh area. It reached a peak of population of more than 8,000 in 1940. Postwar development took place in suburbs, as was typical of the time. The restructuring of the railroad and steel industries caused a severe loss of jobs and population in Brownsville, beginning in the 1970s. The borough had a population of 2,331 as of the 2010 census.

Allison is an unincorporated community and census-designated place (CDP), which is located in Luzerne and Redstone townships in Fayette County, Pennsylvania, United States. It is situated 3 miles (5 km) south of the borough of Brownsville. As of the 2010 census, the population was 625. The CDP includes the neighborhood of Allison Heights in Luzerne Township. Dunlap Creek flows through the center of the CDP, forming the border between Luzerne and Redstone townships.

Redstone Old Fort — or Redstone Fort or (for a short time when built) Fort Burd — on the Nemacolin Trail, was the name of the French and Indian War-era wooden fort built in 1759 by Pennsylvania militia colonel James Burd to guard the ancient Indian trail's river ford on a mound overlooking the eastern shore of the Monongahela River (colloquially, just "the Mon") in what is now Fayette County, Pennsylvania near, or (more likely) on the banks of Dunlap's Creek at the confluence. The site is unlikely to be the same as an earlier fort the French document as Hangard dated to 1754 and which was confusedly, likely located on the nearby stream called Redstone Creek. Red sandstones predominate the deposited rock column of the entire region.

Merrittstown is an unincorporated community in Fayette County, Pennsylvania, United States. The community is located along Pennsylvania Route 166, 3.5 miles (5.6 km) south of Brownsville. Merrittstown has a post office, with ZIP code 15463.

Brownsville Commercial Historic District is a national historic district located adjacent to the Brownsville Northside Historic District at Brownsville, Fayette County, Pennsylvania. The district includes 55 contributing buildings and two contributing structures in the central business district of Brownsville. Most of the contributing buildings are three and four-story brick commercial buildings built between 1900 and 1930, with four buildings dated to the 19th century. The oldest building is the Flatiron Building (c. 1835). Other notable buildings include the International Order of Odd Fellows Building (1876), Monongahela National Bank (1902), Second National Bank (1916), Snowdon Building (1907), Union Station (1928), Crawford Building (1908), and Borough Building (1940). The contributing structures are the separately listed Dunlap's Creek Bridge and a stone railroad tunnel (1903).It was added to the National Register of Historic Places in 1993.

Dunlap's Creek Bridge was the first arch bridge in the United States built of cast iron. It was designed by Richard Delafield and built by the United States Army Corps of Engineers. Constructed from 1836 to 1839 on the National Road in Brownsville, Pennsylvania, it remains in use today. It is listed on the National Register of Historic Places and is a National Historic Civil Engineering Landmark (1978). It is located in the Brownsville Commercial Historic District and supports Market Street, the local main thoroughfare. Due to the steep sides of the Monongahela River valley, there is only room for two short streets parallel to the river's shore and graded mild enough to be comfortable to walk before the terrain rises too steeply for business traffic.

The Brownsville Bridge, also known as the Intercounty Bridge and the West Brownsville Bridge (most often heard in the high counties east of the river), is a truss bridge that carries vehicular traffic across the Monongahela River between Brownsville, Pennsylvania and West Brownsville, Pennsylvania. Since the opening of the Lane Bane Bridge and highway project to carry much of the intercounty through traffic away from the main streets of downtown Brownsville in the early 1960s, another commonly heard name is Old Brownsville Bridge for the four high level viaduct. The West Brownsville-Brownsville Bridge was completed in 1914 to replace an 1831 wooden structure that was ill-suited for the vehicular traffic that the National Road was beginning to carry, as motorized vehicle traffic began replacing animal powered transportation technologies. The famous federal route has crossed the river at this point since its inception, with ferry service in the early nineteenth century. In 1960, the Lane Bane Bridge was constructed just downstream and U.S. Route 40 was moved to the new high-level structure. Currently, the route serves local traffic and is meant to tie together the interconnected towns on each bank. It is designated as a historic bridge by the Washington County History & Landmarks Foundation.

The Flatiron Building in Brownsville, Pennsylvania is located in the Brownsville Commercial Historic District. The building is owned and was restored by the Brownsville Area Revitalization Corporation.

Bowman's Castle, also known as Nemacolin Castle, was built in present-day Brownsville, Pennsylvania, at the western terminus of the Nemacolin's Trail on the east bank of the Monongahela river. It was built around the original trading post, which was built near the site of Fort Burd, the latter built by British colonists during the French and Indian War. Construction on the castle, including addition of a crenellated tower, continued through the Victorian era, when it was considered an engineering marvel.