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99-706: The stated mission is to increase awareness and engagement with the region's rivers and riverfronts through activities and stewardship, and to extend the water and land trails on the major rivers within Allegheny County. At the Pittsburgh Point State Park , there are three rivers: the Allegheny River and Monongahela River , which unite to form the Ohio River . The Three Rivers Heritage Trail extends three miles (5 km) up

198-732: A redoubt —remains in Point State Park, the only intact remnant of Fort Pitt. It was erected in 1764, and is believed to be the oldest building, not only in Pittsburgh, but in Western Pennsylvania. Used for many years as a house, the blockhouse was purchased and has been preserved for many years by the Daughters of the American Revolution , who open it to the public. During the city's early history,

297-590: A tabula rasa . During the course of the Second World War, federal and local authorities established three goals for the site: "the creation of a park commemorating the site's history, improved traffic circulation through the construction of new roads and bridges, and designation of a portion of the site for new office buildings, intended to stimulate private interest in the Golden Triangle". The Allegheny Conference on Community Development became

396-541: A 500% increase in mercury discharges between 2007 and 2013. For several decades beginning in the 1950s, the Ohio River was polluted with hundreds of thousands of pounds of PFOA , a fluoride-based chemical used in making teflon , among other things, by the DuPont chemical company from an outflow pipe at its Parkersburg, West Virginia , facility. The Ohio was listed among America's Most Endangered Rivers of 2023 on

495-776: A French architect and surveyor whose survey was the first mapping of the Ohio River, led an expedition of French troops from Fort Niagara down the Allegheny and Ohio Rivers as far as the mouth of the Great Miami River near Big Bone Lick and possibly the Falls of the Ohio (present-day Louisville ). Chaussegros de Lery mapped the Great Lakes in 1725, and engineered the Niagara fortifications in 1726. I am indebted for

594-566: A competition for top athletes who use the land and water routes to bike, run, and swim for this Olympic qualifier. A less demanding version is the 'Adventure Race', for friends, families, and teams who wish to paddle, bike, and run a shorter yet challenging course. Point State Park Point State Park (locally known as The Point ) is a Pennsylvania state park which is located on 36 acres (150,000 m ) in Downtown Pittsburgh , Allegheny County , Pennsylvania , USA, at

693-603: A driving force for these changes. Edgar Kaufmann, a Pittsburgh department store owner, sat on the board of the Conference and became chair of the 28-member committee convened to look into the Point Park problem. Kaufmann wanted a plan for the Point that was more urban and developed than the park others were imagining. In particular, Kaufmann was a major supporter of Pittsburgh Civic Light Opera and wanted to provide it with

792-729: A much larger fort on the site, Fort Pitt . The Forbes Expedition was successful where the Braddock expedition had failed because of the Treaty of Easton , in which local American Indians agreed to abandon their alliance with the French. American Indians, primarily Delawares and Shawnee , made this agreement with the understanding that the British military would leave the area after the war. The Indians did not want British army garrisons in their territory. The British, however, built Fort Pitt on

891-504: A permanent building. He brought in Wright, by that time a preeminent architect, who had done numerous other projects for Kaufmann in the past, including Kaufmann's landmark home at Fallingwater and an unbuilt design for a parking garage. Plans for Point Park Civic Center fell through and ultimately, the site was turned into a park with historic and recreational aspects, Point State Park. The Fort Pitt blockhouse remained intact, and three of

990-592: A point south of the Ohio River and north of the Falls: "Place where one found the ivory of Elephant in 1729" ( French : endroit ou on à trouvé des os d'Elephant en 1729 ). De Lery's men found teeth weighing ten pounds (4.5 kg) with a diameter of five to seven inches (130 to 180 mm), tusks 11 feet (3.4 m) long and 6–7 inches (150–180 mm) in diameter, and thigh bones 5 feet (1.5 m) long. The bones were collected and shipped to Paris, where they were identified as mastodon remains; they are on display at

1089-637: A power struggle for the region commenced. Virginians took control of Fort Pitt, and for a brief while in the 1770s it was called Fort Dunmore, in honour of Virginia's Governor Lord Dunmore . The fort was a staging ground in Dunmore's War of 1774. During the American Revolutionary War , Fort Pitt was the headquarters for the western theatre of the war. A small brick building called the Blockhouse —actually an outbuilding known as

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1188-633: A single instance only excepted." After the French and Indian War , Britain's trans-Appalachian Indian Reserve was divided by the river into colonial lands to the south and Native American lands to the north. In the late 18th century, the river became the southern boundary of the Northwest Territory . The river is sometimes considered as the western extension of the Mason–Dixon line that divided Pennsylvania from Maryland , and thus part of

1287-678: A southern route to his home in Augusta County, Virginia , in May 1745. John Howard was extradited to France to stand trial. His ship was intercepted by the English and, as a free man, he reported his adventures after landing in London; however, his account has been lost. Salling's detailed account of Virginia's adjacent lands was used in Joshua Fry and Peter Jefferson's 1751 map. In 1749,

1386-910: A whole is ranked as the most polluted river in the United States, based on 2009 and 2010 data. The more industrial and regional West Virginia/Pennsylvania tributary, the Monongahela River , ranked 17th for water pollution , behind 16 other American rivers. The Ohio again ranked as the most polluted in 2013, and has been the most polluted river since at least 2001, according to the Ohio River Valley Water Sanitation Commission (ORSANCO). The Commission found that 92% of toxic discharges were nitrates , including farm runoff and waste water from industrial processes such as steel production. The Commission also noted mercury pollution as an ongoing concern, citing

1485-762: A wide variety of craft then in use. In 1830, the Louisville and Portland Canal (now the McAlpine Locks and Dam ) bypassed the rapids, allowing even larger commercial and modern navigation from the Forks of the Ohio at Pittsburgh to the Port of New Orleans at the mouth of the Mississippi on the Gulf of Mexico. Since the "canalization" of the river in 1929, the Ohio has not been a natural free-flowing river; today, it

1584-481: A year and a half to complete. The confluence of the Allegheny and Monongahela rivers, creating the Ohio River, has greatly impacted the history of Point State Park. This confluence was referred to as the Forks of the Ohio , which remains the official landmark-designated name for the site. It was once at the center of river travel, trade, and even wars throughout the pioneer history of Western Pennsylvania . During

1683-478: Is 1,310 miles (2,110 km) long and carries the largest volume of water of any tributary of the Mississippi. The Indians and early European explorers and settlers of the region often considered the Allegheny to be part of the Ohio. The forks (the confluence of the Allegheny and Monongahela rivers at what is now Pittsburgh) were considered a strategic military location by colonial French and British, and later independent American military authorities. The Ohio River

1782-587: Is a 981-mile-long (1,579 km) river in the United States . It is located at the boundary of the Midwestern and Southern United States , flowing in a southwesterly direction from western Pennsylvania to its mouth on the Mississippi River at the southern tip of Illinois . It is the third largest river by discharge volume in the United States and the largest tributary by volume of

1881-655: Is called the 'Eliza Furnace Trail' because it passes the site where the Jones and Laughlin Steel Company once had its Eliza Furnaces . Some people call this section the 'Jail Trail' because it also passes the Allegheny County Jail on its way to Oakland , the university center of the city. A branch that extends into Schenley Park in Oakland is called the ' Junction Hollow Trail'. As it moves further up

1980-553: Is credited with being the first European to travel and explore western Pennsylvania and the upper Ohio Valley. Viele made contact with Native American nations as far west as the Wabash River , in present-day Indiana. He and his company left Albany , traveling southbound and crossing portions of present-day New Jersey and eastern Pennsylvania. They apparently followed the west branch of the Susquehanna River into

2079-525: Is divided into 21 discrete pools or reservoirs by 20 locks and dams for navigation and power generation. The name "Ohio" comes from the Seneca , Ohi:yo' , lit.  "Good River". In his Notes on the State of Virginia published in 1781–82, Thomas Jefferson stated: "The Ohio is the most beautiful river on earth. Its current gentle, waters clear, and bosom smooth and unbroken by rocks and rapids,

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2178-552: Is formed by the confluence of the Allegheny and Monongahela rivers at what is now Point State Park in Pittsburgh , Pennsylvania . From there, it flows northwest through Allegheny and Beaver counties, before making an abrupt turn to the south-southwest at the West Virginia –Ohio–Pennsylvania triple-state line (near East Liverpool, Ohio ; Chester, West Virginia ; and Ohioville, Pennsylvania ). From there, it forms

2277-652: Is one terminus of the 335-mile (539 km) long ' Great Allegheny Passage ' (GAP) that connects the city to Cumberland, Maryland and Washington, D.C. The route of the GAP uses five miles (8 km) of the 'Three Rivers Heritage Trail'. Within the city, the GAP goes from the Waterfront Mall and Sandcastle upstream on the Monongahela River, and then at the SouthSide Works crosses the river on

2376-617: The 1763 Treaty of Paris . The 1768 Treaty of Fort Stanwix with several tribes opened Kentucky to colonial settlement and established the Ohio River as a southern boundary for American Indian territory. In 1774 the Quebec Act restored the land east of the Mississippi River and north of the Ohio River to Quebec , in effect making the Ohio the southern boundary of Canada . This appeased French Canadians in Quebec but angered

2475-467: The American Civil War . One antebellum slave trader reported that they kept slaves chained two-by-two while navigating the Ohio, only when they reached the Mississippi could the slaves be unchained for a time, because "there was slavery on both sides of the boat." The expression "sold down the river" originated as a lament of Upper South slaves, especially from Kentucky, who were shipped via

2574-648: The Batts and Fallam expedition of 1671, and the Needham and Arthur expedition of 1673–74. In early autumn 1692, loyal English-speaking Dutchman Arnout Viele and a party of eleven companions from Esopus —Europeans, Shawnee , and a few loyal Delaware guides—were sent by the governor of New York to trade with the Shawnee and bring them into the English sphere of influence. Viele understood several Native American languages, which made him valuable as an interpreter. He

2673-639: The French National Natural History Museum . Charles III Le Moyne , second Baron de Longueuil (later the governor of Montreal and interim governor of New France ), commanded Fort Niagara from 1726 to 1733. He led an expedition of 442 men, including Native Americans, from Montreal to war against the Chickasaw who occupied territory on the lower part of the Mississippi River in the area claimed as La Louisiane . According to Gaston Pierre de Lévis , Duke de Mirepoix,

2772-652: The Hot Metal Bridge . Finally, it uses the north bank of the Monongahela to reach the Pittsburgh Point. The 'Friends of the Riverfront' have also developed and administer the 'Three Rivers Water Trail', along the riverfronts of Allegheny County, for kayakers and canoeists , with access points, parking areas, and boat racks. For many years, the trail hosted the annual 'Pittsburgh Triathlon',

2871-714: The Kanawha River , they entered the Ohio River 444 miles (715 km) above the falls. The Virginia pioneers traced the northern boundary of Kentucky for five hundred miles (800 km), reaching the Mississippi River on June 7. They descended just below the mouth of the Arkansas River , where they were ambushed by a large company of Native Americans, Blacks and Frenchmen on July 2, 1742; one or two of Howard's men were killed. The rest were brought to New Orleans and imprisoned as spies. After two years in prison, Salling escaped on October 25, 1744, and returned on

2970-645: The Lenape and Iroquois , considered the Ohio and Allegheny rivers as the same, as is suggested by a New York State road sign on Interstate 86 that refers to the Allegheny River also as Ohi:yo' . Similarly, the Geographic Names Information System lists O-hee-yo and O-hi-o as variant names for the Allegheny. An earlier Miami-Illinois language name was also applied to the Ohio River, Mosopeleacipi ("river of

3069-628: The Midwestern Great Lakes states from the Upper South states, which were historically border states in the Civil War. The Ohio River is a left (east) and the largest tributary by volume of the Mississippi River in the United States . At the confluence , the Ohio is considerably bigger than the Mississippi, measured by long-term mean discharge. The Ohio River at Cairo is 281,500 cu ft/s (7,960 m /s); and

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3168-499: The Mississippi River at the city of Cairo, Illinois . Where the Ohio joins the Mississippi is the lowest elevation in the state of Illinois, at 315 feet (96 m). The Mississippi River flows to the Gulf of Mexico on the Atlantic Ocean . Among rivers wholly or mostly in the United States, the Ohio is the second largest by discharge volume and the tenth longest and has the eighth largest drainage basin. It serves to separate

3267-546: The Mosopelea " tribe). Shortened in the Shawnee language to pelewa thiipi , spelewathiipi or peleewa thiipiiki , the name evolved through variant forms such as "Polesipi", "Peleson", "Pele Sipi" and "Pere Sipi", and eventually stabilized to the variant spellings "Pelisipi", "Pelisippi" and "Pellissippi". Originally applied just to the Ohio River, the "Pelisipi" name later was variously applied back and forth between

3366-529: The National Oceanic and Atmospheric Administration 's Ohio River Forecast Center. The water depth predictions are relative to each local flood plain based upon predicted rainfall in the Ohio River basin in five reports as follows: The water levels for the Ohio River from Smithland Lock and Dam to Cairo, Illinois, are predicted by the National Oceanic and Atmospheric Administration 's Lower Mississippi River Forecast Center. The largest tributaries of

3465-652: The Ohio Company was established in Virginia Colony to settle and trade in the Ohio River region. Exploration of the territory and trade with the Indians in the region near the Forks brought white colonists from both Pennsylvania and Virginia across the mountains, and both colonies claimed the territory. The movement across the Allegheny Mountains of Anglo-American settlers and the claims of

3564-508: The Pennsylvania Department of Conservation and Natural Resources , announced a $ 25 million plan to renovate Point State Park. The plans called for improving the green spaces within the park, expanding recreational opportunities, preserving historical installations, and updating outdated amenities. Those estimated costs grew to a final figure of $ 36 million [2] . The project was scheduled to be completed within four years, with

3663-473: The Potomac River to the Ohio River. The Wheeling Suspension Bridge was built over the river at Wheeling from 1847 to 1849, making the trip west easier. For a brief time, until 1851, it was the world's largest suspension bridge. The bridge survived the American Civil War , after having been improved in 1859. It was renovated again in 1872, and remains in use as the oldest vehicular suspension bridge in

3762-499: The confluence of the Allegheny and Monongahela rivers, forming the Ohio River . Built on land that was acquired via eminent domain from industrial enterprises during the 1950s, this park opened in August 1974 after construction was completed on its iconic fountain. Pittsburgh settled on the current design after rejecting an alternative plan for a Point Park Civic Center designed by Frank Lloyd Wright . The park also includes

3861-416: The humid subtropical and humid continental climate areas. It is inhabited by fauna and flora of both climates. Today, the Ohio River is one of the most polluted rivers in the United States. In winter, it regularly freezes over at Pittsburgh but rarely farther south towards Cincinnati and Louisville . Further down the river in places like Paducah and Owensboro , Kentucky, closer to its confluence with

3960-512: The keelboats used for commerce in the early days of American settlement. The Ohio River boatmen inspired performer Dan Emmett , who in 1843 wrote the song " The Boatman's Dance ". Trading boats and ships traveled south on the Mississippi to New Orleans , and sometimes beyond to the Gulf of Mexico and other ports in the Americas and Europe. This provided a much-needed export route for goods from

4059-421: The Allegheny River is Pittsburgh's North Side also known as Northside, and the trail is referred to locally as the 'North Shore Trail'. On the north bank of the Ohio River, the trail is called the ' Chateau Trail' after the neighborhood along which it runs. On the south bank of the Allegheny, it goes through the food market area and is called the ' Strip District Trail'. On Monongahela River's north bank, it

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4158-400: The Golden Triangle was at a record low and falling. At the point, rarely used railroad facilities included 15 acres (61,000 m ) of yards (60000 m ) and half a mile (800 m) of elevated train tracks. City leaders wanted to alleviate traffic congestion in the city. The Manchester Bridge and Point Bridge met at the point in a way that left no room for the interchange required by

4257-401: The Indians broke off the siege to intercept an approaching force under Colonel Bouquet, resulting in the Battle of Bushy Run . Bouquet fought off the attack and relieved Fort Pitt on August 20. After Pontiac's War, Fort Pitt was no longer necessary to the British Crown, and was abandoned to the locals in 1772. At that time, the Pittsburgh area was claimed by both Virginia and Pennsylvania, and

4356-464: The Mississippi River at Thebes, Illinois , which is upstream of the confluence, is 208,200 cu ft/s (5,897 m /s). The Ohio River flow is greater than that of the Mississippi River, so hydrologically the Ohio River is the main stream of the river system. The Ohio River is a naturally shallow river that was artificially deepened by a series of dams . The natural depth of the river varied from about 3 to 20 feet (1 to 6 m). The dams raise

4455-434: The Mississippi, the Ohio is ice-free year-round. The name "Ohio" comes from the Seneca language (an Iroquoian language ), Ohi:yo' (roughly pronounced oh-hee-yoh, with the vowel in "hee" held longer ), a proper name derived from ohiːyoːh ("good river"), therefore literally translating to "Good River". "Great river" and "large creek" have also been given as translations. Native Americans , including

4554-403: The Monongahela River towards Frick Park , it is called the ' Duck Hollow Trail', because that is where a stream exits the park into the Monongahela. On the south bank of the Monongahela in Pittsburgh's South Side , it is called the 'South Side Trail'. The trail hosts public art and has 61 interpretive signs along the trail, highlighting the region's heritage and riverfront ecology. Pittsburgh

4653-408: The Natural Bridge), crossing Greenbrier River and landing at the New River . At New River, the Virginia explorers built a large bull boat frame and covered it with five buffalo skins. The first Englishmen to explore the region then followed the New River for 250 miles (400 km), until it became too dangerous to navigate. At a large waterfall, they traveled overland to the Coal River . Following

4752-515: The Ohio River and the Clinch River in Virginia and Tennessee . In his original draft of the Land Ordinance of 1784 , Thomas Jefferson proposed a new state called "Pelisipia", to the south of the Ohio River, which would have included parts of present-day Eastern Kentucky , Virginia and West Virginia . The river had great significance in the history of the Native Americans , as numerous prehistoric and historic civilizations formed along its valley. For thousands of years, Native Americans used

4851-514: The Ohio River opened about the same time. Although such boats cruised on the Ohio River in an oval pattern up and down, the state of Kentucky soon protested. Other states had to limit their cruises to going forward, then reversing and going backward on the Indiana shore only. Both Illinois and Indiana have long since changed their laws to allow riverboat casinos to be permanently docked, with Illinois changing in 1999 and Indiana in 2002. The Silver Bridge at Point Pleasant, West Virginia , collapsed into

4950-406: The Ohio River was called the " River Jordan " by slaves crossing it to escape to freedom in the North via the Underground Railroad . More escaping slaves, estimated in the thousands, made their perilous journey north to freedom across the Ohio River than anywhere else across the north-south frontier. Harriet Beecher Stowe 's Uncle Tom's Cabin , the bestselling novel that fueled abolitionist work,

5049-399: The Ohio River watershed. Today, the park provides recreational space for workers, visitors, and residents in downtown Pittsburgh, and also acts as the site for major cultural events in the city, including the Venture Outdoors Festival , Three Rivers Arts Festival and Three Rivers Regatta . The park is operated by the Pennsylvania Bureau of State Parks . The location of the fountain at

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5148-461: The Ohio River's rapids and tributaries in that area. However, the 1783 Treaty of Paris gave the entire Ohio Valley to the United States , and numerous white settlers entered the region. The economic connection of the Ohio Country to the East was significantly increased in 1818 when the National Road being built westward from Cumberland, Maryland , reached Wheeling, Virginia , (now West Virginia ), providing an easier overland connection from

5247-401: The Ohio and Mississippi to cotton and sugar plantations in the Deep South . Changes in crops cultivated in the Upper South resulted in slaves available to be sold to the South, where the expansion of cotton plantations was doing very well. Invention of the cotton gin made cultivation of short-staple cotton profitable throughout the Black Belt of this region. Before and during the Civil War,

5346-443: The Point became a hub for industry and transportation. By the 1930s it was occupied by warehouses and railroad yards. Frank Lloyd Wright commented in 1935 that the city had wasted the potential of its rivers and hilly landscape. In 1945, the situation in this regard was even worse; four years of World War II and eight years of the Great Depression had permitted urban blight to make substantial inroads. The total assessed property value in

5445-429: The U.S. Louisville was founded in 1778 as a military encampment on Corn Island (now submerged) by General George Rogers Clark at the only major natural navigational barrier on the river, the Falls of the Ohio . The Falls were a series of rapids where the river dropped 26 feet (7.9 m) in a stretch of about 2 miles (3.2 km). In this area, the river flowed over hard, fossil-rich beds of limestone . The outpost

5544-460: The Virginia mountains to the Mississippi River. The elder Howard had a promised reward of 10,000 acres (4,000 ha) of land for a successful expedition from the Virginia Royal Governor's Council to reinforce British claims in the west. Howard offered equal shares of the 10,000 acres to the four other members of his expedition. The party of five left John Peter Salling's house in August County on March 16, 1742, and traveled west to Cedar Creek (near

5643-407: The area near modern-day Pittsburgh led to conflict with the French, who had forts in the Ohio River Valley . This conflict was called the French and Indian War , and would merge into the global Anglo-French struggle, the Seven Years' War . In 1763, following its defeat in the war, France ceded its area east of the Mississippi River to Britain and its area west of the Mississippi River to Spain in

5742-406: The border between free and slave territory, and between the Northern and Southern United States or Upper South . Where the river was narrow, it was crossed by thousands of slaves escaping to the North for freedom; many were helped by free blacks and whites of the Underground Railroad resistance movement. The Ohio River is a climatic transition area, as its water runs along the periphery of

5841-401: The border between West Virginia and Ohio, upstream of Wheeling, West Virginia . The river follows a roughly southwest and then west-northwest course until Cincinnati, before bending to a west-southwest course for most of the remainder of its length. The course forms the northern borders of West Virginia and Kentucky ; and the southern borders of Ohio , Indiana and Illinois , until it joins

5940-441: The bridges to be relocated away from the Point, creating more space for adjoining access roads and interchanges. Although the site had substantial problems, Robert Alberts observes that "the condition, in the view of the city planner, was almost perfect". The Point had few property owners who needed to be bought out, few residents who would need relocation, and few structures worth preserving. Architects and planners could treat it as

6039-411: The colonists of the Thirteen Colonies . Lord Dunmore's War south of the Ohio river also contributed to cession of land north to Quebec to prevent colonial expansion onto Native American territory. During the Revolutionary War . in 1776 the British military engineer John Montrésor created a map of the river showing the strategic location of Fort Pitt , including specific navigational information about

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6138-412: The expedition used the Ohio River as a corridor to the Mississippi. Among the officers who accompanied this party were Major de Lignery; Lieutenants, de Vassan, Aubert de Gaspe, Du Vivier, de Verrier, Le Gardeur de St. Pierre, Chevalier de Villiers, de Portneuf, de Sabrevious; Father Vernet, chaplain; Cadets, Joncaire de Closonne , Le Gai de Joncaire, Drouet de Richarville the younger, Chaussegros de Lery

6237-408: The first reported eyewitness accounts of Shannoah , a Shawnee town, was by le Moyne III in July 1739. On their journey down the Ohio River toward the Mississippi, they met with local chiefs in a village on the Scioto River . John Howard, a pioneer from Virginia, led a party of five— John Peter Salling (a Pennsylvania German), Josiah Howard (John's son), Charles Sinclair, and John Poteet (Vizt)—from

6336-485: The five bastions of the fort have been restored. The state acquired almost all property for the site by 1949, at a cost of $ 7,588,500 ($  97.2 million in 2024); the park was finally completed in August 1974. Areas adjoining the park were condemned to permit commercial development, most notably Gateway Center . Moving downstream about 100 yards: The following state parks are within 30 miles (48 km) of Point State Park: Ohio River The Ohio River

6435-429: The fort successfully early in the war, turning back the 1755 expedition led by General Edward Braddock . A smaller attack by James Grant in September 1758 was repulsed, but with heavy losses. Two months later, on November 25, the Forbes Expedition , under General John Forbes , captured the site after the French destroyed Fort Duquesne the day before. The British built the temporary Mercer's Fort in 1759, and later

6534-541: The fur trade from the Iroquois nations to the northeast, they migrated west of the Mississippi River in the 17th century to the territory now defined as Missouri , Arkansas , and Oklahoma . Several accounts exist of the discovery and traversal of the Ohio River by Europeans in the latter half of the 17th century: Virginian colonist Abraham Wood 's trans-Appalachian expeditions between 1654 and 1664; Frenchman Robert de La Salle 's putative Ohio expedition of 1669; and two expeditions of Virginians sponsored by Colonel Wood:

6633-531: The heels of contamination from a high-profile train derailment , and following years as one of the most polluted watersheds in the United States. The Ohio River is extensively industrialized and populated. Regular barge traffic carries cargoes of oil, steel and other industrial goods produced in the region. Major cities located along the northern and southern banks of the river include Pittsburgh, Pennsylvania ; Louisville, Kentucky ; Evansville, Indiana ; and Cincinnati, Ohio . The combined Allegheny-Ohio river

6732-417: The increasing size of steamships and barges on the river meant that the outdated locks could serve only the smallest vessels until well after the Civil War when improvements were made. The U.S. Army Corps of Engineers improvements were expanded again in the 1960s, forming the present-day McAlpine Locks and Dam . During the nineteenth century, emigrants from Virginia, North Carolina and Kentucky traveled by

6831-540: The largest inhabited island in the Ohio River, belongs to West Virginia, although it is closer to the Ohio shore than to the West Virginia shore. Kentucky sued the state of Indiana in the early 1980s because of their construction of the never-completed Marble Hill Nuclear Power Plant in Indiana, which would have discharged its waste water into the river. This would have adversely affected Kentucky's water supplies. The U.S. Supreme Court held that Kentucky's jurisdiction (and, implicitly, that of West Virginia) extended only to

6930-407: The low-water mark of 1793 (important because the river has been extensively dammed for navigation so that the present river bank is north of the old low-water mark). Similarly, in the 1990s, Kentucky challenged Illinois's right to collect taxes on a riverboat casino docked in Metropolis , citing its own control of the entire river. A private casino riverboat that docked in Evansville, Indiana , on

7029-406: The majority of the work to be finished in time for Pittsburgh's 250th anniversary celebration in 2008. Sections of the park had fallen into disuse since it was established in the summer of 1974. The homeless had used the trenches surrounding the foundations of the remains of Fort Pitt as a temporary shelter for years. Graffiti on the structures of the park had become a major problem. Sections of

7128-560: The mid-18th century, the armies of France and the Great Britain carved paths through the wilderness to control the point area and trade on the rivers. The French built Fort Duquesne in 1754 on foundations of Fort Prince George , which had been built by the colonial forces of Virginia . The French held Fort Duquesne during the French and Indian War , and it became one of the focal points for that war because of its strategic riverside location in disputed territory. The French held

7227-674: The mountains, traversing the Tioga River and reaching a tributary of the Allegheny River before floating down to the Shawnee towns along the Ohio River. Viele and his expedition spent most of 1693 exploring the Ohio River and its tributaries in northern Kentucky with their Shawnee hosts. Gerit Luykasse, two of Viele's Dutch traders, and two Shawnee reappeared in Albany in February 1694 "to fetch powder for Arnout [Viele] and his Company"; their party had been gone for fifteen months, but Viele

7326-546: The mouth of the Ohio, settlers would travel north on the Mississippi River to St. Louis, Missouri . There, some continued on up the Missouri River , some up the Mississippi, and some farther west over land routes. In the early 19th century, river pirates such as Samuel Mason , operating out of Cave-In-Rock, Illinois , waylaid travelers on their way down the river. They killed travelers, stealing their goods and scuttling their boats. The folktales about Mike Fink recall

7425-487: The north side of the Allegheny River to Millvale , and also three miles (5 km) down the north bank of the Ohio River to Brunot Island . On the Monongahela River, the trail goes five miles (8 km) upriver from Station Square to a point just short of the Waterfront Shopping District . Within the city, the trail takes the names of neighborhoods through which it passes. The north bank of

7524-528: The north-south flowing Mississippi River, which divides the eastern from western United States. It is also the sixth oldest river on the North American continent. The river flows through or along the border of six states , and its drainage basin includes parts of 14 states. Through its largest tributary, the Tennessee River , the basin includes several states of the southeastern U.S. It is

7623-570: The outlines and remains of two of the oldest structures in Pittsburgh, Fort Pitt and Fort Duquesne . The Fort Pitt Museum , which is housed in the Monongahela Bastion of Fort Pitt, commemorates the French and Indian War (1754–63), during which the area soon to become Pittsburgh became a major battlefield . It was designated as a National Historic Landmark in 1960 for its role in the strategic struggles between Native Americans, French colonists, and British colonists, for control of

7722-433: The park were littered with fence posts, cut logs, plastic drums, and rolled up snow drift fencing. The walkways were cracked and beginning to fall apart. The restoration project aimed to reestablish the park as a recreational destination. Plans for the 2006 improvements to the park included installing new pumps and pipes in the fountain, establishing a seating area around the fountain and a wading area for children, restoring

7821-493: The river and settled along its northern bank. Known as butternuts , they formed the dominant culture in the southern portions of Ohio, Indiana and Illinois with a society that was primarily Southern in culture. Largely devoted to agricultural pursuits, they shipped much of their produce along the river to ports such as Cincinnati. Because the Ohio River flowed westward, it became a convenient means of westward movement by pioneers traveling from western Pennsylvania. After reaching

7920-741: The river as a major transportation and trading route. In the five centuries before European colonization, the Mississippian culture built numerous regional chiefdoms and major earthwork mounds in the Ohio Valley like the Angel Mounds near Evansville, Indiana as well as in the Mississippi Valley and the Southeast. The historic Osage , Omaha , Ponca , and Kaw peoples lived in the Ohio Valley. Under pressure over

8019-675: The river on December 15, 1967. The collapse killed 46 people who had been crossing when the bridge failed. The bridge had been built in 1929, and by 1967 was carrying too heavy a load for its design. The bridge was rebuilt about one mile downstream and in service as the Silver Memorial Bridge in 1969. In the early 1980s, the Falls of the Ohio National Wildlife Conservation Area was established at Clarksville, Indiana . The Ohio River as

8118-403: The river walk with steps that lead into the river, building kiosks for information and concessions, renovating the rest rooms, water taxi landings and surrounding docks, and installing wireless internet access hubs. These plans were not put into place without some controversy. On January 25, 2007, thirteen members of two local labor unions were arrested for blocking access by contractors to

8217-483: The river. The colonial charter for Virginia defined its territory as extending to the north shore of the Ohio, so that the riverbed was "owned" by Virginia. Where the river serves as a boundary between states today, Congress designated the entire river to belong to the states on the east and south, i.e., West Virginia and Kentucky at the time of admission to the Union, that were divided from Virginia. Thus Wheeling Island ,

8316-663: The site, naming it after William Pitt the Elder . As a result, in 1763 local Delawares and Shawnees took part in Pontiac's Rebellion , an effort to drive the British from the region. The Indians' siege of Fort Pitt began on June 22, 1763, but the fort was too strong to be taken by force. During a diplomatic meeting at the fort, the commander of Fort Pitt Simon Ecuyer gave Delaware Indian emissaries blankets that had been exposed to smallpox in hopes of infecting them, as suggested by trader William Trent. The use of blankets to spread smallpox

8415-475: The source of drinking water for five million people. The river became a primary transportation route for pioneers during the westward expansion of the early U.S. The lower Ohio River just below Louisville was obstructed by rapids known as the Falls of the Ohio where the elevation falls 26 feet (7.9 m) in 2 miles (3.2 km) restricting larger commercial navigation, although in the 18th and early 19th century its three deepest channels could be traversed by

8514-600: The spring before left as many as one hundred Native Americans dead in Ohio Country from 1763 to 1764. It is not clear, however, whether the smallpox was a result of the Fort Pitt incident or the virus was already present among the Delaware people as outbreaks happened on their own every dozen or so years and the delegates were met again later and they seemingly had not contracted smallpox. On August 1, 1763, most of

8613-706: The tip of the Point previously served as a connector for two old bridges, the Manchester Bridge (over the Allegheny River) and Point Bridge (over the Monongahela). Both were removed in 1970 to make way for the fountain. In April 2009, the fountain was turned off for a $ 9.6 million upgrade and refurbishment; it went online again at the opening of the Three Rivers Arts Festival on June 7, 2013. The fountain also serves as

8712-516: The topographical details of the course of this River to M. de Lery, Engineer, who surveyed it with the compass at the time that he descended it with a detachment of French troops in 1729. A map of the Ohio River valley, drawn by Bellin from observations by de Lery, is in Pierre François Xavier de Charlevoix 's History of New France . The 1744 Bellin map, "Map of Louisiana" ( French : Carte de La Louisiane ), has an inscription at

8811-417: The volume of traffic. The growth of the city had made parking a serious problem as well. Robert Moses , who had developed the traffic scheme for New York City , was brought in and published a traffic plan in 1939. He offered a circular park surrounded by approach roads connecting the bridges to the city. His plan retained the existing bridges, but most of the experts brought in to examine the problem called for

8910-466: The water level and have turned the river largely into a series of reservoirs , eliminating shallow stretches and allowing for commercial navigation. From its origin to Cincinnati, the average depth is approximately 15 feet (5 m). The largest immediate drop in water level is below the McAlpine Locks and Dam at the Falls of the Ohio at Louisville, Kentucky , where flood stage is reached when

9009-443: The water reaches 23 feet (7 m) on the lower gauge. However, the river's deepest point is 168 feet (51 m) on the western side of Louisville, Kentucky. From Louisville, the river loses depth very gradually until its confluence with the Mississippi at Cairo, Illinois , where it has an approximate depth of 19 feet (6 m). Water levels for the Ohio River from Smithland Lock and Dam upstream to Pittsburgh are predicted daily by

9108-476: The west since the trek east over the Appalachian Mountains was long and arduous. The need for access to the port of New Orleans by settlers in the Ohio Valley is one of the factors that led to the United States' Louisiana Purchase in 1803. Because the river is the southern border of Ohio, Indiana, and Illinois, it was part of the border between free states and slave states in the years before

9207-657: The western terminus for the Great Allegheny Passage , a 150-mile hiker-biker trail beginning at the 184.5 milepost of the Cumberland, MD terminus of the Chesapeake & Ohio Canal National Historical Park, which begins in the Georgetown area of Washington, DC , thus forming in total a 350-mile recreational trail between DC and Pittsburgh. On October 11, 2006, Michael DeBerardinis, Secretary of

9306-420: The work sites at the remnants of Fort Pitt. The unions were protesting the use of four non-represented workers by the contractor. In addition, advocates for historical preservation disagreed with the decision to bury the remnants of the fort's walls, which could damage the bricks and remove the walls from public access. Point State Park was reopened to the public in the spring of 2008. The renovation process took

9405-574: The younger, de Gannes, Chev. Benoist, de Morville, de Selles, and seventeen others. The rank and file consisted of three sergeants, six corporals, six lance corporals, twenty-four soldiers, forty-five habitants , one hundred and eighty-six Iroquois from the Sault, forty-one from the Lake of Two Mountains , thirty-two Algonquin and Nipissing , fifty Abenaqui from St. Francois and Bécancour, Quebec; Father La Bretonnier, Jesuit; Queret, missionary. One of

9504-550: Was away for about two years. He and his companions returned from the Pennsylvania wilderness in August 1694, accompanied by diplomats from "seven Nations of Indians" who sought trade with the English (or peace with the powerful Iroquois nations of New York and Pennsylvania), and hundreds of Shawnee who intended to relocate in the Minisink country on the upper Delaware River . In 1729, Gaspard-Joseph Chaussegros de Léry ,

9603-511: Was discussed and approved the next month between British General Jeffery Amherst and his subordinate Colonel Henry Bouquet , who was marching to Fort Pitt with a force of 460 soldiers. Smallpox was highly contagious among the Native Americans, and — together with measles , influenza, chicken pox , and other Old World diseases — was a major cause of death since the arrival of Europeans and their animals. A reported outbreak that began

9702-478: Was moved that same year to the south shore where Fort-on-Shore was constructed. It proved insufficient within 3 years, and the mighty Fort Nelson was constructed upriver. The town of Louisville was chartered in 1780, in honor of King Louis XVI of France. The first locks on the river – the Louisville and Portland Canal – were built between 1825 and 1830 to circumnavigate the falls. Fears that Louisville's transshipment industry would collapse proved ill-founded: but

9801-486: Was the best known of the anti-slavery novels that portrayed such escapes across the Ohio. The times have been expressed by 20th-century novelists as well, such as the Nobel Prize -winning Toni Morrison , whose novel Beloved was adapted as a film of the same name. She also composed the libretto for the opera Margaret Garner (2005), based on the life and trial of an enslaved woman who escaped with her family across

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