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113-520: The need for a bridge was beyond doubt and long overdue as the towns of Ambridge and Woodlawn, which had populations in the hundreds at the turn of the 20th century, exceeded 40,000 by the late 1920s. In September 1924, the plans for a bridge over the Ohio River linking Ambridge and Woodlawn were revived from earlier ones shelved in 1917 by the outbreak of the First World War. A bond issue for $ 1.5 million

226-731: A 790-foot main span, and the East Bay Bridge of the San Francisco Oakland Bay Bridge built in 1937 with a 1,400 foot main span. The first Carquinez Strait Bridge in Vallejo, CA, built in 1927, was a back-to-back 1,100 foot cantilevered truss. The bridge was closed temporarily in November 2021 for repairs, causing extreme traffic problems for residents of the surrounding community. It reopened in December 2021 with no plans for closures in

339-504: A coastline is impossible to measure exactly . Canada borders approximately 5,200 miles (8,400 km) of coastline, while the remaining 5,300 miles (8,500 km) are bordered by the United States. Michigan has the longest shoreline of the United States, bordering roughly 3,288 miles (5,292 km) of lakes, followed by Wisconsin (820 miles (1,320 km)), New York (473 miles (761 km)), and Ohio (312 miles (502 km)). Traversing

452-619: A habitat to many aquatic species in a region with much biodiversity . The surrounding region is called the Great Lakes region , which includes the Great Lakes Megalopolis . Major cities within the region include, on the American side, from east to west, Buffalo , Cleveland , Detroit , Chicago , and Milwaukee ; and, on the Canadian side, Toronto , Hamilton and Mississauga . Though

565-523: A large watershed via many rivers and contain approximately 35,000 islands. There are also several thousand smaller lakes, often called "inland lakes", within the basin. The surface area of the five primary lakes combined is roughly equal to the size of the United Kingdom, while the surface area of the entire basin (the lakes and the land they drain) is about the size of the UK and France combined. Lake Michigan

678-634: A list of historic edifices, modernized and converted to a restaurant. During 1910 - 1930, the P & LE operated 50 passenger daily trains on its 65-mile Pittsburgh - Youngstown portion of its system. Ticketing agreements with the Erie RR and the P & LE's parent New York Central, passengers boarding in Pittsburgh could ride coaches or sleepers west to Toledo, Detroit, Chicago, and St. Louis, and north to Cleveland, Buffalo, Toronto, Albany and Boston. The Baltimore & Ohio RR obtained trackage rights in 1934 on

791-405: A national basis. The total surface area of the lakes is approximately 94,250 square miles (244,100 km )—nearly the same size as the United Kingdom, and larger than the U.S. states of New York , New Jersey , Connecticut , Rhode Island , Massachusetts , Vermont , and New Hampshire combined. The Great Lakes coast measures approximately 10,500 miles (16,900 km), but the length of

904-456: A nuisance to industries by clogging pipes. The U.S. Fish and Wildlife Service estimated in 2007 that the economic impact of the zebra mussel could be about $ 5 billion over the next decade. The alewife first entered the system west of Lake Ontario via 19th-century canals. By the 1960s, the small silver fish had become a familiar nuisance to beach goers across Lakes Michigan, Huron, and Erie. Periodic mass die-offs result in vast numbers of

1017-681: A possible reason for a decrease in population of various whitefish , important because of their culinary desirability and, hence, economic consequence. Moreover, between 1879 and 1899, reported whitefish harvests declined from some 24.3 million pounds (11 million kg) to just over 9 million pounds (4 million kg). By 1900, commercial fishermen on Lake Michigan were hauling in an average of 41 million pounds of fish annually. By 1938, Wisconsin's commercial fishing operations were motorized and mechanized, generating jobs for more than 2,000 workers, and hauling 14 million pounds per year. The population of giant freshwater mussels

1130-560: A relatively small area of southeast Lake Michigan where savanna or prairie occasionally intruded). Logging, urbanization, and agriculture uses have changed that relationship. In the early 21st century, Lake Superior's shores are 91% forested, Lake Huron 68%, Lake Ontario 49%, Lake Michigan 41%, and Lake Erie, where logging and urbanization has been most extensive, 21%. Some of these forests are second or third growth (i.e. they have been logged before, changing their composition). At least 13 wildlife species are documented as becoming extinct since

1243-483: A season, and can survive poor water quality conditions. The influx of parasitic lamprey populations after the development of the Erie Canal and the much later Welland Canal led to the two federal governments of the United States and Canada working on joint proposals to control it. By the mid-1950s, the lake trout populations of Lakes Michigan and Huron were reduced, with the lamprey deemed largely to blame. This led to

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1356-707: A second fault line, the Saint Lawrence rift , formed approximately 570 million years ago, the basis for Lakes Ontario and Erie was created, along with what would become the Saint Lawrence River. The Great Lakes are estimated to have been formed at the end of the Last Glacial Period (the Wisconsin glaciation ended 10,000 to 12,000 years ago), when the Laurentide Ice Sheet receded. The retreat of

1469-673: A small percid fish from Eurasia, became the most abundant fish species in Lake Superior's Saint Louis River within five years of its detection in 1986. Its range, which has expanded to Lake Huron, poses a significant threat to the lower lake fishery. Five years after first being observed in the St. Clair River, the round goby can now be found in all of the Great Lakes. The goby is considered undesirable for several reasons: it preys upon bottom-feeding fish, overruns optimal habitat, spawns multiple times

1582-450: A steel plant and the other in the bridge company’s fabrication yard was duly noted. Local supporters claimed, “Only the paint had to be brought in”. Even the gravel and sand for the piers were excavated from the river by the local contractor, Dravo. The Ambridge–Aliquippa Bridge’s cantilevered trusses are made from riveted steel, a design favored from the 1920s through the 1970s for crossings with 600 to 1,400 foot main spans. In addition to

1695-414: Is "new" water, originating from rivers, precipitation, and groundwater springs. In the post-glacial period, evaporation , and drainage have generally been balanced, making the levels of the lakes relatively constant. Intensive human population growth began in the region in the 20th century and continues today. At least two human water use activities have been identified as having the potential to affect

1808-621: Is flat according to the International Joint Commission. Reports about this issue on the U.S. side highlight five large municipal systems (those of Detroit, Cleveland, Buffalo, Milwaukee and Gary ) as being the largest current periodic sources of untreated discharges into the Great Lakes. The fish of the Great Lakes have anti-depressant drugs meant for humans in their brains, which has caused concerns. The number of American adults who take anti-depressant drugs rose from 7.7% of all American adults in 1999–2002 to 12.7% in 2011–2014. As

1921-546: Is heavy. Pleasure boats can enter or exit the Great Lakes by way of the Erie Canal and Hudson River in New York. The Erie Canal connects to the Great Lakes at the east end of Lake Erie (at Buffalo, New York ) and at the south side of Lake Ontario (at Oswego, New York ). The lakes were originally fed by both precipitation and meltwater from glaciers which are no longer present. In modern times, only about 1% of volume per year

2034-401: Is the largest lake, by surface area, that is entirely within one country, the United States. The Great Lakes began to form at the end of the Last Glacial Period around 14,000 years ago, as retreating ice sheets exposed the basins they had carved into the land, which then filled with meltwater. The lakes have been a major source for transportation, migration, trade, and fishing, serving as

2147-459: Is the only one of the Great Lakes that is entirely within the United States; the others form a water boundary between the United States and Canada. The lakes are divided among the jurisdictions of the Canadian province of Ontario and the U.S. states of Michigan , Wisconsin , Minnesota , Illinois , Indiana , Ohio , Pennsylvania , and New York . Both the province of Ontario and the state of Michigan include in their boundaries portions of four of

2260-508: Is to be replaced by a regional CSX intermodal facility. In 1904, P&LE built the O'Donovan Bridge for easier automobile access from Island Avenue to The Bottoms without crossing the railroad tracks. This was replaced in 1931 by the McKees Rocks Bridge , which extended to Ohio River Boulevard but still provided access to The Bottoms via Helen Street exit. The McKees Rocks Community Development Corporation has plans to adaptively reuse

2373-667: The Canada–United States border . The five lakes are Superior , Michigan , Huron , Erie , and Ontario . (Hydrologically, Michigan and Huron are a single body of water, as they are joined by Straits of Mackinac .) The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect to the Atlantic Ocean via the Saint Lawrence River , and to the Mississippi River basin through

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2486-944: The Chicago Sanitary and Ship Canal to the Gulf of Mexico via the Illinois River (from the Chicago River ) and the Mississippi River. An alternate track is via the Illinois River (from Chicago), to the Mississippi, up the Ohio, and then through the Tennessee–Tombigbee Waterway (a combination of a series of rivers and lakes and canals), to Mobile Bay and the Gulf of Mexico. Commercial tug -and- barge traffic on these waterways

2599-832: The Door Peninsula , the Peninsulas of Michigan , and the Ontario Peninsula . Some of these peninsulas even contain smaller peninsulas, such as the Bruce , Keweenaw , Leelanau , Niagara , and Thumb peninsulas. Population centers on the peninsulas include Grand Rapids , Flint , and Detroit in Michigan along with London , Hamilton , Brantford , and Toronto in Ontario. Although the Saint Lawrence Seaway and Great Lakes Waterway make

2712-516: The Environmental Protection Agency have shown that when the mercury comes in contact with many of the bacteria and compounds in the fresh water, it forms the compound methyl mercury , which has a much greater impact on human health than elemental mercury due to a higher propensity for absorption. This form of mercury is not detrimental to a majority of fish types, but is very detrimental to people and other wildlife animals who consume

2825-669: The Finger Lakes region of New York, as well as in Prince Edward County, Ontario , on Lake Ontario's northeast shore. The Great Lakes have been observed to help intensify storms, such as Hurricane Hazel in 1954, and the 2011 Goderich, Ontario tornado , which moved onshore as a tornadic waterspout . In 1996, a rare tropical or subtropical storm was observed forming in Lake Huron, dubbed the 1996 Lake Huron cyclone . Rather large severe thunderstorms covering wide areas are well known in

2938-529: The Illinois Waterway . The Great Lakes are the largest group of freshwater lakes on Earth by total area and the second-largest by total volume. They contain 21% of the world's surface fresh water by volume. The total surface is 94,250 square miles (244,106 km ), and the total volume (measured at the low water datum) is 5,439 cubic miles (22,671 km ), slightly less than the volume of Lake Baikal (5,666 cu mi or 23,615 km , 22–23% of

3051-585: The Monongahela River to McKeesport, Pennsylvania , then the Youghiogheny River to Connellsville , Pennsylvania. Mileage on this P&LE branch was reckoned from the passenger terminal back at the Smithfield Street Bridge. The Pittsburgh, McKeesport & Youghiogheny Railroad also followed the Monongahela River to Brownsville, Pennsylvania . The Pittsburgh and Lake Erie Railroad

3164-513: The Niagara Escarpment precludes all natural navigation, the four upper lakes are commonly called the "upper great lakes". This designation is not universal. Those living on the shore of Lake Superior often refer to all the other lakes as "the lower lakes", because they are farther south. Sailors of bulk freighters transferring cargoes from Lake Superior and northern Lake Michigan and Lake Huron to ports on Lake Erie or Ontario commonly refer to

3277-497: The biosphere . Since the 19th century, an estimated 160 new species have found their way into the Great Lakes ecosystem; many have become invasive; the overseas ship ballast and ship hull parasitism are causing severe economic and ecological impacts. According to the Inland Seas Education Association, on average a new species enters the Great Lakes every eight months. Introductions into the Great Lakes include

3390-414: The zebra mussel , which was first discovered in 1988, and quagga mussel in 1989. Since 2000, the invasive quagga mussel has smothered the bottom of Lake Michigan almost from shore to shore, and their numbers are estimated at 900 trillion. The mollusks are efficient filter feeders, competing with native mussels and reducing available food and spawning grounds for fish. In addition, the mussels may be

3503-579: The " snowbelts " receive regular snow fall from this localized weather pattern, especially along the eastern shores of the lakes. Snowbelts are found in Wisconsin, Michigan, Ohio, Pennsylvania, New York, and Ontario. Related to the lake effect is the regular occurrence of fog, particularly along the shorelines of the lakes. This is most noticeable along Lake Superior's shores. The lakes tend to moderate seasonal temperatures to some degree but not with as large an influence as do large oceans; they absorb heat and cool

Ambridge–Aliquippa Bridge - Misplaced Pages Continue

3616-563: The 1993 CSX takeover of P&LE, Gateway Yard was closed and most tracks have been removed. The yard tower still stands but has been heavily vandalized. The McKees Rocks Yard facility was home to a yard, major locomotive rebuilding and general maintenance, as well as freight car repair and maintenance. On the westernmost end of the McKees Rocks yard, the P&;LE interchanged with the PC&;Y. However,

3729-489: The Chicago Sanitary and Ship Canal in order to keep several species of invasive Asian carp out of the lakes. These fast-growing planktivorous fish have heavily colonized the Mississippi and Illinois river systems. Invasive species, particularly zebra and quagga mussels, may be at least partially responsible for the collapse of the deepwater demersal fish community in Lake Huron, as well as drastic unprecedented changes in

3842-458: The Great Lakes accessible to ocean-going vessels, shifts in shipping to wider ocean-going container ships —which do not fit through the locks on these routes—have limited container shipping on the lakes. Most Great Lakes trade is of bulk material, and bulk freighters of Seawaymax -size or less can move throughout the entire lakes and out to the Atlantic. Larger ships are confined to working within

3955-459: The Great Lakes during mid-summer; these Mesoscale convective complexes or MCCs can cause damage to wide swaths of forest and shatter glass in city buildings. These storms mainly occur during the night, and the systems sometimes have small embedded tornadoes, but more often straight-line winds accompanied by intense lightning. Historically, the Great Lakes, in addition to their lake ecology , were surrounded by various forest ecoregions (except in

4068-441: The Great Lakes each year. Plastics in the water break up into very small particles known as microplastics . Microplastics can also come from synthetic clothing washed down our drains. Plastic waste found in the lakes include single-use plastics , plastics used in packaging, takeout containers as well as pre-production pellets produced by plastics industry . High concentrations of microplastics were discovered in 100 percent of

4181-438: The Great Lakes region include: Plant lists include: Logging of the extensive forests in the Great Lakes region removed riparian and adjacent tree cover over rivers and streams, which provide shade, moderating water temperatures in fish spawning grounds. Removal of trees also destabilized the soil, with greater volumes washed into stream beds causing siltation of gravel beds, and more frequent flooding. Running cut logs down

4294-550: The Great Lakes. A number of self-operating floating devices called Seabin, were put in the Great Lakes to capture plastic trash as part of the Great Lakes Plastic Cleanup project. The project captured 74,000 pieces of trash using this technology between 2020 and 2021; however, it does not claim to catch up with 22 million pounds (10.0 kt) of plastic that ends up in Great Lakes every year. The production, consumption, and throwing away of plastics seems to remain

4407-620: The Kondike Coke fields. Later in 1915 it reached Fairmont, West Virginia . When Conrail was formed, the Pittsburgh and Lake Erie Railroad again became an independent company because P&LE was owed $ 15.2 million by Penn Central, and operated as such until its merger into CSX Transportation (CSX). Starting in 1934, the Baltimore and Ohio Railroad (B&O) bought trackage rights over P&LE from McKeesport to New Castle. The B&O's route through Pittsburgh had excessive grades and curves. In

4520-458: The Lake Shore and Michigan Southern Railway was reached for routing traffic at Youngstown , Ohio. The final track laying between Pittsburgh and Youngstown was on January 27, 1879. At the opening in 1879, the P&LE was a poorly built, single track line. Fortunately for the railroad it was an immediate success and money was soon available for improvements. In 1881, the P&LE became linked with

4633-485: The McKees Rocks shops were built. The company came under more formal control in 1887 by the New York Central Railroad . Lake Shore and Michigan Southern Railway's president, John Newell, took over as president of the P&LE in 1887. Under Newell, Reed and Colonel Schoonmaker; the P&LE would become the "Little Giant". From 1887 to 1927, the P&LE would become a heavy duty railroad, with double track all

Ambridge–Aliquippa Bridge - Misplaced Pages Continue

4746-643: The Monongahela River to Brownsville, Pennsylvania in 1901. The Pennsylvania Railroad at the same time had extended to Brownsville. Both the PRR and the P&LE had plans to extend even further up the river into West Virginia coke fields. Most likely due to the South Penn, they decided to work together by using the Monongahela Railway . The Monongahela Railway then was extended south to Martin, Pennsylvania reaching

4859-711: The Ohio River and two railways, the bridge crosses two main highways making the full length 1,908 feet excluding the end spans. Thousands of bridges very similar were built across the US during that time, especially in the eastern US. Contemporaries constructed by the American Bridge Company include the Louisville Municipal Bridge in 1929 with an 820-foot main span, the Huey P. Long Bridge in New Orleans built in 1935 with

4972-712: The P&LE Terminal in Pittsburgh. The original line continued east past that station for a little over two miles (3.2 km) (listed in Youghiogheny Branch table below) to near 24th Street in the South Side Flats neighborhood of Pittsburgh, where it met the Monongahela Connecting Railroad and the Pittsburgh, McKeesport & Youghiogheny (PM&Y). The Pittsburgh, McKeesport and Youghiogheny Railroad ran from 24th Street in Pittsburgh, PA to Connellsville, Pennsylvania, in 1882. The PM&Y followed

5085-507: The P&LE, and Chicago-New York trains such as the Capitol Limited (Chicago-Washington), Columbian (Chicago-Washington) and Ambassador (Detroit-Baltimore) operated over the P & LE between New Castle Junction and McKeesport. These trains stopped at the Terminal located in Pittsburgh's South Side. The trackage sharing arrangement continued until Amtrak assumed responsibility for

5198-459: The PC&Y facilities were just behind the P&LE Locomotive facilities in the main yard, and trackage from the PC&Y crossed the P&LE Mainline at this point, servicing several local businesses in the Bottoms section of McKees Rocks, finally making the previously mentioned interchange. Most of the McKees Rocks facilities are now gone. The entire McKees Rocks locomotive facility, shops, and yard

5311-466: The PM&;Y all of the funds to build to Connellsville, Pennsylvania and then lease it to the P&LE for 99 years. The PM&Y in the end was the only part of the South Penn that was built, but it would be an important part of the P&LE. The PM&Y opened in 1883 and leased to the P&LE in 1884. Concurrently in 1883, to get the P&LE ready for the expected new business due to the South Penn linkage,

5424-478: The Pennsylvania Secretary of State. The stated length of the railroad was for 57 miles (92 km). After 2 years the starting group was not very successful at raising the required funds and in 1877 many of the directors were succeeded by a new group of Pittsburgh businessmen. The new group was James I. Bennett, David Hostetter , James M. Baily, Mark W. Watson and James M. Schoonmaker, all influential. In

5537-594: The Smithfield Street Bridge. The Pittsburgh Terminal was the railroad's headquarters, passenger train shed, and freight warehouse complex. In the upper photo, the terminal sits along the Monongahela river. The roof of the freight house is to the right of the terminal train shed. The former P&LE headquarters building at the bottom of the Monongahela Incline has been converted into a present-day shopping center, Station Square . The passenger station has been placed on

5650-500: The Straits of Mackinac. The straits are five miles (8 km) wide and 120 feet (37 m) deep; the water levels rise and fall together, and the flow between Michigan and Huron frequently reverses direction. Dispersed throughout the Great Lakes are approximately 35,000 islands . The largest among them is Manitoulin Island in Lake Huron, the largest island in any inland body of water in

5763-427: The U.S. A variety of steps taken to process industrial and municipal pollution discharges into the system greatly improved water quality by the 1980s, and Lake Erie in particular is significantly cleaner. Discharge of toxic substances has been sharply reduced. Federal and state regulations control substances like PCBs . The first of 43 " Great Lakes Areas of Concern " to be formally "de-listed" through successful cleanup

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5876-470: The US that year, the last one linking Ambridge and Woodlawn across the Ohio river was likely to have been the shortest distance hauled from factory to construction site. When the Ambridge-Woodlawn Bridge opened to the public that winter, the local paper reported the usual fanfare, commemorations, and even an “aerial bombardment”. The extreme convenience of building a bridge with one end adjacent to

5989-495: The air in summer, then slowly radiate that heat in autumn. They protect against frost during transitional weather and keep the summertime temperatures cooler than further inland. This effect can be very localized and overridden by offshore wind patterns. This temperature buffering produces areas known as " fruit belts ", where fruit can be produced that is typically grown much farther south. For instance, western Michigan has apple orchards, and cherry orchards are cultivated adjacent to

6102-459: The anti-depressant drugs pass out of human bodies and through sanitation systems into the Great Lakes, this has resulted in fish in the Great Lakes with twenty times the level of anti-depressants in their brains than what is in the water, leading to the fish being exceedingly happy and hence less risk-averse, to the extent of damaging the fish populations. Researchers have found that more than 22 million pounds (10.0 kt) of plastic end up in

6215-598: The areas of its main train line extending the line north to Youngstown and south to Connellsville. This provided a means of transportation from the steel centers of Pittsburgh to the Great Lakes and St. Lawrence Seaway area. The original line ran between Youngstown, Ohio (at Haselton) and 24th Street in Pittsburgh, Pennsylvania near the Jones and Laughlin Iron Works , opened in 1879. The P&LE's passenger terminal in Pittsburgh

6328-432: The arrival of Europeans, and many more are threatened or endangered. Meanwhile, exotic and invasive species have also been introduced. While the organisms living on the bottom of shallow waters are similar to those found in smaller lakes, the deep waters contain organisms found only in deep, cold lakes of the northern latitudes. These include the delicate opossum shrimp (order mysida ), the deepwater scud (a crustacean of

6441-565: The building. The College Hill neighborhood of Beaver Falls had a small yard located just below Geneva College along the Beaver River . There was also a small roundhouse on the property, plus the College Hill Station . Today, only the station remains. Great Lakes The Great Lakes ( French : Grands Lacs ), also called the Great Lakes of North America , are a series of large interconnected freshwater lakes spanning

6554-427: The core of Great Lakes trash problem. Algae such as diatoms , along with other phytoplankton , are photosynthetic primary producers supporting the food web of the Great Lakes, and have been affected by global warming . The changes in the size or in the function of the primary producers may have a direct or an indirect impact on the food web. Photosynthesis carried out by diatoms constitutes about one fifth of

6667-750: The cyanobacteria ... will produce toxins", said Michael McKay, of the University of Windsor. Water quality testing was underway in August 2019. Until 1970, mercury was not listed as a harmful chemical, according to the United States Federal Water Quality Administration. In the 21st century, mercury has become more apparent in water tests. Mercury compounds have been used in paper mills to prevent slime from forming during their production, and chemical companies have used mercury to separate chlorine from brine solutions. Studies conducted by

6780-475: The east with Youngstown, Ohio , in the Haselton neighborhood in the west and Connellsville , Pennsylvania, to the east. It did not reach Lake Erie (at Ashtabula, Ohio ) until the formation of Conrail in 1976. The P&LE was known as the "Little Giant" since the tonnage that it moved was out of proportion to its route mileage. While it operated around one tenth of one percent of the nation's railroad miles, it hauled around one percent of its tonnage. This

6893-439: The eastern limits of the Departure Yard in Lowellville. The Hump Yard was located in Struthers in the center of the facility, and the Receiving Yard was to the west. The special purpose yards were "Diesel Servicing Facilities", "Gorilla Park" and "Interchange" yards. The "Interchange" yard was made up of six tracks, four were for interchange to and from the B&O Railroad and two of which were for general use. The other interchange

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7006-401: The fish that were studied by researchers from the Rochman Lab. About 50 million pounds (23 kt) of fish is harvested each year from Great Lakes which has raised concerns on how this might affect human health. Microscopic pieces of plastic have also been found in drinking water coming from Great Lakes. It is estimated that nearly 40 million people in the region rely on drinking water from

7119-443: The fish washing up on shore; estimates by various governments have placed the percentage of Lake Michigan's biomass which was made up of alewives in the early 1960s as high as 90%. In the late 1960s, the various state and federal governments began stocking several species of salmonids, including the native lake trout as well as non-native chinook and coho salmon; by the 1980s, alewife populations had dropped drastically. The ruffe ,

7232-443: The fish. Mercury has been known for health related problems such as birth defects in humans and animals, and the near extinction of eagles in the Great Lakes region. The amount of raw sewage dumped into the waters was the primary focus of both the first Great Lakes Water Quality Agreement and federal laws passed in both countries during the 1970s. Implementation of secondary treatment of municipal sewage by major cities greatly reduced

7345-432: The five lakes lie in separate basins, they form a single, naturally interconnected body of fresh water, within the Great Lakes Basin . As a chain of lakes and rivers, they connect the east-central interior of North America to the Atlantic Ocean. From the interior to the outlet at the Saint Lawrence River, water flows from Superior to Huron and Michigan, southward to Erie, and finally northward to Lake Ontario. The lakes drain

7458-420: The foreseeable future. 40°35′32″N 80°14′12″W  /  40.5923°N 80.2366°W  / 40.5923; -80.2366 Pittsburgh and Lake Erie Railroad The Pittsburgh and Lake Erie Railroad ( P&LE ; reporting mark PLE ), also known as the "Little Giant", was formed on May 11, 1875. Company headquarters were located in Pittsburgh, Pennsylvania . The line connected Pittsburgh in

7571-417: The glaciers "rebounded" as it was uncovered. Since the glaciers covered some areas longer than others, this glacial rebound occurred at different rates. The Great Lakes have a humid continental climate, Köppen climate classification Dfa (in southern areas) and Dfb (in northern parts) with varying influences from air masses from other regions including dry, cold Arctic systems, mild Pacific air masses from

7684-410: The historical average level. Although "true tides—changes in water level caused by the gravitational forces of the sun and moon—do occur in a semi-diurnal (twice daily) pattern", such changes are quite small and generally obscured by other forces. The lake levels are affected primarily by changes in regional meteorology and climatology. The outflows from Lakes Superior and Ontario are regulated, while

7797-442: The ice sheet left behind a large amount of meltwater ( Lake Algonquin , Lake Chicago , Glacial Lake Iroquois , and Champlain Sea ) that filled up the basins that the glaciers had carved, thus creating the Great Lakes as they are today. Because of the uneven nature of glacier erosion , some higher hills became Great Lakes islands. The Niagara Escarpment follows the contour of the Great Lakes between New York and Wisconsin. Land below

7910-483: The key indicators even in the current era of sophisticated analyses and measuring instruments. According to the bi-national (U.S. and Canadian) resource book, The Great Lakes: An Environmental Atlas and Resource Book : "The largest Great Lakes fish harvests were recorded in 1889 and 1899 at some 67,000 tonnes (66,000 long tons; 74,000 short tons) [147 million pounds]." By 1801, the New York Legislature found it necessary to pass regulations curtailing obstructions to

8023-481: The lake and causing blooms," said Michael McKay, executive director of the Great Lakes Institute for Environmental Research (GLIER) at the University of Windsor . The largest Lake Erie bloom to date occurred in 2015, exceeding the severity index at 10.5 and in 2011 at a 10. In early August 2019, satellite images depicted a bloom stretching up to 1,300 square kilometres on Lake Erie, with the heaviest concentration near Toledo, Ohio . A large bloom does not necessarily mean

8136-634: The lake shore as far north as the Grand Traverse Bay . Near Collingwood, Ontario , commercial fruit orchards, including a few wineries, exist near the shoreline of southern Nottawasaga Bay . The eastern shore of Lake Michigan and the southern shore of Lake Erie have many successful wineries because of the lakes' moderating effects, as do the large commercial fruit and wine growing areas of the Niagara Peninsula located between Lake Erie and Lake Ontario. A similar phenomenon allows wineries to flourish in

8249-525: The lakes has been observed since records began in 1918. The water level of Lake Michigan–Huron had remained fairly constant over the 20th century. Recent lake levels include record low levels in 2013 in Lakes Superior, Erie, and Michigan-Huron, followed by record high levels in 2020 in the same lakes. The water level in Lake Ontario has remained relatively constant in the same time period, hovering around

8362-464: The lakes' levels: diversion (the transfer of water to other watersheds) and consumption (substantially done today by the use of lake water to power and cool electric generation plants, resulting in evaporation). Outflows through the Chicago Sanitary and Ship Canal is more than balanced by artificial inflows via the Ogoki River and Long Lake/ Kenogami River diversions. Fluctuation of the water levels in

8475-454: The lakes. Only barges can access the Illinois Waterway system providing access to the Gulf of Mexico via the Mississippi River. Despite their vast size, large sections of the Great Lakes freeze over in winter, interrupting most shipping from January to March. Some icebreakers ply the lakes, keeping the shipping lanes open through other periods of ice on the lakes. The Great Lakes are connected by

8588-415: The lakes. The province of Ontario does not border Lake Michigan, and the state of Michigan does not border Lake Ontario. New York and Wisconsin's jurisdictions extend into two lakes, and each of the remaining states into one of the lakes. As the surfaces of Lakes Superior, Huron, Michigan, and Erie are all approximately the same elevation above sea level, while Lake Ontario is significantly lower, and because

8701-578: The last years of the P&LE, CSX used the line more than P&LE leading to the merger. Most of the online customers had long been gone, with only the main line still intact. In 1993 the company was purchased by CSX. The CSX designated the P&LE as a new subsidiary, the Three Rivers Railway . However, in 1993, CSX leased the TRR, and there is currently no de facto distinction between the former P&LE and any other portion of CSX's system. Presidents of

8814-468: The latter as the lower lakes and Lakes Michigan, Huron, and Superior as the upper lakes. This corresponds to thinking of lakes Erie and Ontario as "down south" and the others as "up north". Vessels sailing north on Lake Michigan are considered "upbound" even though they are sailing toward its effluent current. Lakes Huron and Michigan are sometimes considered a single lake, called Lake Michigan–Huron, because they are one hydrological body of water connected by

8927-494: The launch of the bi-national Great Lakes Fishery Commission . Several species of exotic water fleas have accidentally been introduced into the Great Lakes, such as the spiny waterflea, Bythotrephes longimanus , and the fishhook waterflea, Cercopagis pengoi , potentially having an effect on the zooplankton population. Several species of crayfish have also been introduced that may contend with native crayfish populations. More recently an electric fence has been set up across

9040-409: The nation's passenger rail service in 1971. P&LE operated commuter trains into Pittsburgh. In 1964, it ran one round-trip between Youngstown and Pittsburgh as well as one additional southbound and two additional northbound trains on the section between Beaver Falls and Pittsburgh. Latest by 1968, only the section between College Hill , Beaver Falls, Aliquippa and P&LE's Pittsburgh Terminal

9153-476: The natural migrations of Atlantic salmon from Lake Erie into their spawning channels. In the early 19th century, the government of Upper Canada found it necessary to introduce similar legislation prohibiting the use of weirs and nets at the mouths of Lake Ontario's tributaries. Other protective legislation was passed, but enforcement remained difficult. On both sides of the Canada–United States border,

9266-516: The notorious South Pennsylvania Railroad (South Penn). This would lead to William Henry Vanderbilt to control of the P&LE as a link in the South Penn and the building of the Pittsburgh, McKeesport and Youghiogheny Railroad . The South Pennsylvania Railroad was planned to connect to the PM&Y. Vanderbilt did this by buying Henry W. Oliver 's and the Harmony Society's stock in the P&LE. Then Vanderbilt, aided by Andrew Carnegie, advanced

9379-463: The order amphipoda ), two types of copepods , and the deepwater sculpin (a spiny, large-headed fish). The Great Lakes are an important source of fishing . Early European settlers were astounded by both the variety and quantity of fish; there were 150 different species in the Great Lakes. Throughout history, fish populations were the early indicator of the condition of the Lakes and have remained one of

9492-506: The outflows of Michigan-Huron and Erie are not regulated at all. Ontario is the most tightly regulated, with its outflow controlled by the Moses-Saunders Power Dam , which explains its consistent historical levels. The Great Lakes contain 21% of the world's surface fresh water: 5,472 cubic miles (22,810 km ), or 6.0×10 U.S. gallons, that is 6 quadrillion U.S. gallons, (2.3×10 liters). The lakes contain about 84% of

9605-507: The proliferation of dams and impoundments have multiplied, necessitating more regulatory efforts. Concerns by the mid-19th century included obstructions in the rivers which prevented salmon and lake sturgeon from reaching their spawning grounds. The Wisconsin Fisheries Commission noted a reduction of roughly 25% in general fish harvests by 1875. The states have removed dams from rivers where necessary. Overfishing has been cited as

9718-445: The railroad were as follows: After Newell the presidency would be held by the president of the NYC with the active management of the local vice president. Vice Presidents: With Nash the active management went back to the president. The P&LE's Pittsburgh passenger train station (interior seen in the lower right photo) sat adjacent the south bank of the Monongahela River at the foot of

9831-571: The river on the Beaver Bridge . From there it followed the Beaver River to just south of New Castle, Pennsylvania , where it then followed the Mahoning River west-northwest, crossing into Ohio just east of Lowellville . From there it ran northwest into Youngstown, terminating at a junction with the New York Central known as Haselton. In the table below, mileage is reckoned westbound from

9944-428: The routine discharge of untreated sewage during the 1970s and 1980s. The International Joint Commission in 2009 summarized the change: "Since the early 1970s, the level of treatment to reduce pollution from waste water discharges to the Great Lakes has improved considerably. This is a result of significant expenditures to date on both infrastructure and technology, and robust regulatory systems that have proven to be, on

10057-436: The shoreline of all the lakes would cover a distance roughly equivalent to travelling half-way around the world at the equator. A notable modern phenomenon is the formation of ice volcanoes over the lakes during wintertime. Storm-generated waves carve the lakes' ice sheet and create conical mounds through the eruption of water and slush. The process is only well-documented in the Great Lakes, and has been credited with sparing

10170-583: The southern shorelines from worse rocky erosion. It has been estimated that the foundational geology that created the conditions shaping the present day upper Great Lakes was laid from 1.1 to 1.2 billion years ago, when two previously fused tectonic plates split apart and created the Midcontinent Rift , which crossed the Great Lakes Tectonic Zone . A valley was formed providing a basin that eventually became modern day Lake Superior. When

10283-514: The spring of 1877, the first rails were laid down in Beaver Falls, which had the largest population other than Pittsburgh. The other reason for this was around February 1877 Jacob Henrici of the Harmony Society had business there. Henrici would also become a director in 1877. On July 6, 1877, McCreery resigned and Bennett was elected to president with Jacob Henrici becoming a director. Henrici

10396-414: The surface freshwater of North America; if the water were evenly distributed over the entire continent's land area, it would reach a depth of 5 feet (1.5 meters). This is enough water to cover the 48 contiguous U.S. states to a uniform depth of 9.5 feet (2.9 m). Although the lakes contain a large percentage of the world's fresh water, the Great Lakes supply only a small portion of U.S. drinking water on

10509-551: The treatment plant, are temporarily overwhelmed by heavy rainstorms. Local sewage treatment authorities then must release untreated effluent, a mix of rainwater and sewage, into local water bodies. While enormous public investments such as the Deep Tunnel projects in Chicago and Milwaukee have greatly reduced the frequency and volume of these events, they have not been eliminated. The number of such overflow events in Ontario, for example,

10622-522: The tributary rivers into the Great Lakes also dislocated sediments. In 1884, the New York Fish Commission determined that the dumping of sawmill waste (chips and sawdust) had impacted fish populations. The first U.S. Clean Water Act , passed by a Congressional override after being vetoed by U.S. President Richard Nixon in 1972, was a key piece of legislation, along with the bi-national Great Lakes Water Quality Agreement signed by Canada and

10735-416: The warmer and shallower portions of the system such as Lake Erie, Saginaw Bay , Green Bay , and the southernmost portion of Lake Michigan. By the mid-1980s, most jurisdictions bordering the Great Lakes had controlled phosphate detergents . Blue-green algae, or cyanobacteria blooms, have been problematic on Lake Erie since 2011. "Not enough is being done to stop fertilizer and phosphorus from getting into

10848-487: The way from Pittsburgh to Youngstown. The P&LE operated as an independent subsidiary, even after New York Central and Pennsylvania Railroad merged to form Penn Central . The making of coke in Connellsville had been a big part of P&LE traffic, but by the early 20th century it had lessened. The development of by-products distillation processing of coke had moved to the Pittsburgh area. The P&LE then extended up

10961-430: The west pick up the air and moisture from the lake surface, which is slightly warmer in relation to the cold surface winds above. As the slightly warmer, moist air passes over the colder land surface, the moisture often produces concentrated, heavy snowfall that sets up in bands or "streamers". This is similar to the effect of warmer air dropping snow as it passes over mountain ranges. During freezing weather with high winds,

11074-427: The west, and warm, wet tropical systems from the south and the Gulf of Mexico. The lakes have a moderating effect on the climate; they can also increase precipitation totals and produce lake effect snowfall . The Great Lakes can have an effect on regional weather called lake-effect snow , which is sometimes very localized. Even late in winter, the lakes often have no icepack in the middle. The prevailing winds from

11187-480: The whole, quite effective." The commission reported that all urban sewage treatment systems on the U.S. side of the lakes had implemented secondary treatment, as had all on the Canadian side except for five small systems. Though contrary to federal laws in both countries, those treatment system upgrades have not yet eliminated combined sewer overflow events. This describes when older sewerage systems, which combine storm water with sewage into single sewers heading to

11300-413: The world's surface fresh water). Because of their sea-like characteristics, such as rolling waves, sustained winds, strong currents, great depths, and distant horizons, the five Great Lakes have long been called inland seas . Depending on how it is measured, by surface area, either Lake Superior or Lake Michigan–Huron is the second-largest lake in the world and the largest freshwater lake. Lake Michigan

11413-552: The world. The second-largest island is Isle Royale in Lake Superior. Both of these islands are large enough to contain multiple lakes themselves—for instance, Manitoulin Island's Lake Manitou is the world's largest lake on a freshwater island. Some of these lakes even have their own islands, like Treasure Island in Lake Mindemoya in Manitoulin Island. The Great Lakes also have several peninsulas between them, including

11526-523: The zooplankton community of the lake. Scientists understand that the micro-aquatic life of the lakes is abundant but know very little about some of the most plentiful microbes and their environmental effects in the Great Lakes. Although a drop of lake water may contain 1 million bacteria cells and 10 million viruses , only since 2012 has there been a long-term study of the lakes' micro-organisms. Between 2012 and 2019 more than 160 new species have been discovered. Native habitats and ecoregions in

11639-546: Was Ontario's Collingwood Harbour in 1994; Ontario's Severn Sound followed in 2003. Presque Isle Bay in Pennsylvania is formally listed as in recovery, as is Ontario's Spanish Harbour. Dozens of other Areas of Concern have received partial cleanups such as the Rouge River (Michigan) and Waukegan Harbor (Illinois). Phosphate detergents were historically a major source of nutrient to the Great Lakes algae blooms in particular in

11752-575: Was a major hub location on the railroad, until the creation of Conrail. Gateway Yard was opened in October 1957, to be a modern hump yard. The yard was approximately 200 acres (0.81 km ) stretching for a distance of just over 5 miles (8.0 km) from Lowellville, Ohio to Center Street in Youngstown, Ohio. Gateway Yard was made up of three principal yards, and an assortment of smaller, special-purpose yards. The principal yards were arranged linearly, with

11865-517: Was eliminated as the mussels were harvested for use as buttons by early Great Lakes entrepreneurs. The Great Lakes: An Environmental Atlas and Resource Book (1972) notes: "Only pockets remain of the once large commercial fishery." Water quality improvements realized during the 1970s and 1980s, combined with successful salmonid stocking programs, have enabled the growth of a large recreational fishery. The last commercial fisherman left Milwaukee in 2011 because of overfishing and anthropogenic changes to

11978-672: Was largely because the P&LE served the steel mills of the greater Pittsburgh area, which consumed and shipped vast amounts of materials. It was a specialized railroad, deriving much of its revenue from coal , coke , iron ore , limestone , and steel . The eventual closure of the steel mills led to the end of the P&LE as an independent line in 1992. At the end of 1970 P&LE operated 211 miles (340 km) of road on 784 miles (1,262 km) of track, not including PC&Y and Y&S; in 1970 it reported 1419 million ton-miles of revenue freight, down from 2437 million in 1944. The P&LE purchased many smaller railroads that operated in

12091-668: Was on the south bank of the Monongahela River , at the foot of the Smithfield Street Bridge . The P&LE followed the left downstream bank of the Monongahela River past the terminal to the Golden Triangle , where that waterway meets the Allegheny River and becomes the Ohio River . The railroad continued northwest along the left downstream bank of the Ohio River to the vicinity of Beaver, Pennsylvania , where it crossed

12204-442: Was served by one single roundtrip commuter train per day. In 1978, P&LE tried to drop that last commuter train, which was met by fierce objections. With state support, P&LE continued to operate the commuter run but eventually ended the service on July 12, 1985, after passenger counts had dropped significantly. The PATrain commuter operation continued to use some P&LE-trackage until 1989. The Youngstown Gateway Yard

12317-405: Was submitted to county voters and passed in November 1924. In January 1925 the county commissioners petitioned the court and the grand jury for authority to build the bridge and later that month made application to congress for authority to bridge the Ohio. Dravo Contracting submitted the low bid of $ 144,000 to construct four piers completed on August 13, 1926 one month ahead of schedule. The steel

12430-499: Was supplied by the Aliquippa Works for $ 609,000. The American Bridge Company charged $ 337,500. Pittsburgh and Lake Erie Railroad , which later became Conrail and CSX, paid $ 39,000 for the portion over its tracks. The total cost with approaches was $ 1.25 million - completed in record time and within estimates. It opened to the public on opened December 11, 1927. While the American Bridge Company constructed dozens bridges throughout

12543-463: Was the creation of William McCreery , a prominent Pittsburgh businessman, merchant, and railroad builder. McCreery had suffered at the hands of the Pennsylvania Railroad in a business that had a loss or failed. The Pennsylvania Railroad at the time used discriminatory rates which became a hot issue in Pittsburgh. On May 11, 1870 McCreery and ten other people filed Articles of Association with

12656-464: Was the key due to his Harmony Society ties which was a communal religious group founded in 1805. In 1880, William Henry Vanderbilt 's Lake Shore and Michigan Southern Railway bought stock to the tune of $ 200,000 in the P&LE. The P&LE would stay in the Vanderbilt's New York Central system until Conrail. Also in 1877, an agreement between the P&LE and the Atlantic & Great Western (Erie) and

12769-519: Was with New York Central Railroad which was a direct interchange. The western yard limit was the end of track for the P&LE. Beyond the western end of the Yard was the NYC mainline that continued to Ashtabula, Ohio . The yard was constructed when the P&LE was under the control of the New York Central Railroad. Conrail routing most of the traffic around P&LE facilities in the area. After

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