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150-625: Although there are many other hydrological divides in the Americas, the Continental Divide is by far the most prominent of these because it tends to follow a line of high peaks along the main ranges of the Rocky Mountains and Andes , at a generally much higher elevation than the other hydrological divisions. Beginning at the westernmost point of the Americas , Cape Prince of Wales , just south of

300-764: A canal across the isthmus, with some favoring a canal across Nicaragua and others advocating the purchase of the French interests in Panama. Bunau-Varilla , who was seeking American involvement, asked for $ 100 million, but accepted $ 40 million in the face of the Nicaraguan option. In June 1902, the US Senate voted in favor of the Spooner Act , to pursue the Panamanian option, provided the necessary rights could be obtained. On 22 January 1903,

450-688: A canal. Numerous canals were built in other countries in the late 18th and early 19th centuries. The success of the Erie Canal through central New York in the United States in the 1820s and the collapse of the Spanish Empire in Latin America resulted in growing American interest in building an inter-oceanic canal. Beginning in 1826, US officials began negotiations with Gran Colombia (present-day Colombia, Venezuela, Ecuador, and Panama), hoping to gain

600-523: A concession to build a canal. Jealous of their newly gained independence and fearing domination by the more powerful United States, president Simón Bolívar and New Granada officials declined American offers. After the collapse of Gran Colombia, New Granada remained unstable under constant government intrigue. Great Britain attempted to develop a canal in 1843. According to the New-York Daily Tribune , 24 August 1843, Barings Bank of London and

750-536: A dense population. Most of the highest summits of the Rocky Mountains are in Colorado , with that state having an average elevation in excess of 2,000 metres (6,600 ft). Public parks and forest lands protect much of the mountain range, and they are popular tourist destinations, especially for hiking, camping, mountaineering, fishing, hunting, mountain biking, snowmobiling, skiing, and snowboarding. The name of

900-579: A high worker mortality rate . The US took over the project in 1904 and opened the canal in 1914. The US continued to control the canal and surrounding Panama Canal Zone until the Torrijos–Carter Treaties provided for its handover to Panama in 1977. After a period of joint American–Panamanian control, the Panamanian government took control in 1999. It is now managed and operated by the Panamanian government-owned Panama Canal Authority . The original locks are 33.5 meters (110 ft) wide and allow

1050-523: A mixture of white pine, fir, and spruce that appear as shrub-like krummholz . Finally, rivers and canyons can create a unique forest zone in more arid parts of the mountain range. The Rocky Mountains are an important habitat for a great deal of well-known wildlife, such as wolves , elk , moose , mule and white-tailed deer , pronghorn , mountain goats , bighorn sheep , badgers , black bears , grizzly bears , coyotes , lynxes , cougars , and wolverines . North America's largest herds of elk are in

1200-431: A relatively flat terrain. The Tetons and other north-central ranges contain folded and faulted rocks of Paleozoic and Mesozoic age draped above cores of Proterozoic and Archean igneous and metamorphic rocks ranging in age from 1.2 billion (e.g., Tetons) to more than 3.3 billion years ( Beartooth Mountains ). There are a wide range of environmental factors in the Rocky Mountains. The Rockies range in latitude between

1350-611: A sea-level canal (like the Suez), but he visited the site only a few times, during the dry season which lasts only four months of the year. His men were unprepared for the rainy season, during which the Chagres River , where the canal started, became a raging torrent, rising up to 10 m (33 ft). The dense jungle was alive with venomous snakes, insects, and spiders, but the worst challenges were yellow fever , malaria , and other tropical diseases, which killed thousands of workers; by 1884,

1500-572: A sea-level canal, as had been attempted by the French and temporarily abandoned by them in 1887 for a ten locks system designed by Philippe Bunau-Varilla, and definitively in 1898 for a lock-and-lake canal designed by the Comité Technique of the Compagnie Nouvelle de Canal de Panama as conceptualized by Adolphe Godin de Lépinay in 1879. But in 1906 Stevens, who had seen the Chagres in full flood,

1650-691: A self-educated engineer who had built the Great Northern Railroad . Stevens was not a member of the ICC; he increasingly viewed its bureaucracy as a serious hindrance, bypassing the commission and sending requests and demands directly to the Roosevelt administration in Washington, DC. One of Stevens' first achievements in Panama was in building and rebuilding the housing, cafeterias, hotels, water systems, repair shops, warehouses, and other infrastructure needed by

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1800-583: A settlement began and resulted in the Torrijos–Carter Treaties . On 7 September 1977, the treaty was signed by President of the United States Jimmy Carter and Omar Torrijos , de facto leader of Panama. This mobilized the process of granting the Panamanians free control of the canal so long as Panama signed a treaty guaranteeing the permanent neutrality of the canal. The treaty led to full Panamanian control effective at noon on 31 December 1999, and

1950-795: A similar relationship to tourism promotions by the Great Northern Railway . While settlers filled the valleys and mining towns, conservation and preservation ethics began to take hold. U.S. President Benjamin Harrison established several forest reserves in the Rocky Mountains in 1891–1892. In 1905, U.S. President Theodore Roosevelt extended the Medicine Bow Forest Reserve to include the area now managed as Rocky Mountain National Park . Economic development began to center on mining, forestry , agriculture, and recreation , as well as on

2100-688: A small lake located in the Athabasca Pass . The Alpine Club of Canada 's Abbot Pass Hut sat directly astride the Divide in Abbot Pass on the boundary between Banff National Park and Yoho National Park , and thus precipitation falling on the eastern half of the roof flowed via Lake Louise into Hudson Bay, while rain falling on the western half flowed via Lake O'Hara into the Pacific Ocean. Rocky Mountains The Rocky Mountains , also known as

2250-581: A treaty, in the name of the Société civile internationale du Canal interocéanique par l'isthme du Darien headed by general Étienne Türr, with the Colombian government, known as the Wyse concession, to build an interoceanic canal through Panama. The first attempt to construct a canal through what was then Colombia's province of Panama began on 1 January 1881. The project was inspired by the diplomat Ferdinand de Lesseps , who

2400-671: Is ᐊᓭᓂᐓᒉ Aseniwuche . The Rocky Mountains are the easternmost portion of the expansive North American Cordillera . They are often defined as stretching from the Liard River in British Columbia south to the headwaters of the Pecos River , a tributary of the Rio Grande , in New Mexico. The Rockies vary in width from 110 to 480 kilometres (70 to 300 miles). The Rocky Mountains contain

2550-649: Is an artificial 82-kilometer (51-mile) waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean , cutting across the Isthmus of Panama , and is a conduit for maritime trade. Locks at each end lift ships up to Gatun Lake , an artificial fresh water lake 26 meters (85 ft) above sea level , created by damming up the Chagres River and Lake Alajuela to reduce the amount of excavation work required for

2700-654: Is considered part of the Atlantic, then the triple point is at an unimportant-looking, permanently snow and ice covered hump on the border between Alberta and British Columbia , on the southern slope of Snow Dome at 3,456 metres (11,300 ft). The exact location of this potential triple point is somewhat indeterminate because the Columbia Icefield and the snow on top of it shifts from year to year. The snow that falls on it (about 10 metres (33 ft) per year) does not actually flow downhill as water, but creeps downhill in

2850-627: Is natural gas that arises from coal, either through bacterial action or through exposure to high temperature. Coalbed methane supplies 7 percent of the natural gas used in the U.S. The largest coalbed methane sources in the Rocky Mountains are in the San Juan Basin in New Mexico and Colorado and the Powder River Basin in Wyoming. These two basins are estimated to contain 38 trillion cubic feet of gas. Coalbed methane can be recovered by dewatering

3000-694: Is no single monolithic ecosystem for the entire Rocky Mountain Range. Instead, ecologists divide the Rockies into a number of biotic zones . Each zone is defined by whether it can support trees and the presence of one or more indicator species . Two zones that do not support trees are the Plains and the Alpine tundra . The Great Plains lie to the east of the Rockies and is characterized by prairie grasses (below roughly 550 m or 1,800 ft). Alpine tundra occurs in regions above

3150-702: Is so named because water falling on the mountain reaches not only the Atlantic and Pacific but Hudson Bay as well. Farther north in Alberta, the Athabasca and other rivers feed the basin of the Mackenzie River , which has its outlet on the Beaufort Sea of the Arctic Ocean. Human population is not very dense in the Rockies, with an average of four people per square kilometer and few cities with over 50,000 people. However,

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3300-402: Is sometimes misinterpreted as the "99-year lease" because of misleading wording included in article 22 of the agreement. Almost immediately, the treaty was condemned by many Panamanians as an infringement on their country's new national sovereignty. This would later become a contentious diplomatic issue among Colombia, Panama, and the United States. President Roosevelt famously stated, "I took

3450-453: Is the main reason behind the designation of Waterton-Glacier International Peace Park as the "Crown of the Continent" of North America. The summit of the peak is the world's only oceanic triple divide point. Discounting Antarctica and its ice sheets, only one other continent ( Asia ) borders three oceans, but the inward-draining Endorheic basin area of Central Asia from western China to

3600-655: Is the world's only oceanic triple divide, there are secondary triple divide points wherever any two continental divides meet. North America has five major drainage systems: into the Pacific, Atlantic and Arctic oceans, plus Hudson Bay and the Gulf of Mexico. Other sources such as the International Hydrographic Organization add a sixth: Canada's Northwest Passage basin. Using just the five, there are four secondary continental divides and three secondary triple points,

3750-591: The 49th parallel north as the international boundary west from Lake of the Woods to the "Stony Mountains"; the UK and the US agreed to what has since been described as "joint occupancy" of lands further west to the Pacific Ocean. Resolution of the territorial and treaty issues, the Oregon dispute , was deferred until a later time. In 1819, Spain ceded their rights north of the 42nd Parallel to

3900-479: The Alberta–British Columbia foothills forests . The status of most species in the Rocky Mountains is unknown, due to incomplete information. European-American settlement of the mountains has adversely impacted native species. Examples of some species that have declined include western toads , greenback cutthroat trout , white sturgeon , white-tailed ptarmigan , trumpeter swan , and bighorn sheep. In

4050-539: The Apache , Arapaho , Bannock , Blackfoot , Cheyenne , Coeur d'Alene , Kalispel , Crow Nation , Flathead , Shoshone , Sioux , Ute , Kutenai (Ktunaxa in Canada), Sekani , Dunne-za , and others. Paleo-Indians hunted the now-extinct mammoth and ancient bison (an animal 20% larger than modern bison) in the foothills and valleys of the mountains. Like the modern tribes that followed them, Paleo-Indians probably migrated to

4200-506: The Aral and Caspian Seas is so vast that any Arctic and Indian Ocean tributaries are never within proximity of each other. Thus, North America's status of having a single location draining into three oceans is unique in the world. Sources differ, however, on whether Hudson Bay, entirely south of the Arctic Circle , is part of the Atlantic or Arctic Ocean. Hudson Bay's water budget connects to

4350-583: The Canadian Pacific Railway eventually followed the Kicking Horse and Rogers Passes to the Pacific Ocean. Canadian railway officials also convinced Parliament to set aside vast areas of the Canadian Rockies as Jasper , Banff , Yoho , and Waterton Lakes National Parks , laying the foundation for a tourism industry which thrives to this day. Glacier National Park (MT) was established with

4500-641: The Cassiar Mountains , Omineca Mountains and northern Nechako Plateau to Summit Lake , north of the city of Prince George and just south of the community of McLeod Lake . From there the Divide traverses the McGregor Plateau to the spine of the Rockies, following the crest of the Canadian Rockies southeast to the 120th meridian west , from there forming the boundary between southern British Columbia and southern Alberta . The Divide crosses into

4650-503: The Climax mine, near Leadville, Colorado , was the largest producer of molybdenum in the world. Molybdenum is used in heat-resistant steel in such things as cars and planes. The Climax mine employed over 3,000 workers. The Coeur d'Alene mine of northern Idaho produces silver, lead, and zinc. Canada's largest coal mines are near Fernie, British Columbia and Sparwood , British Columbia; additional coal mines exist near Hinton, Alberta , and in

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4800-675: The Columbia District for Britain. The party crossed the Rockies into the Columbia Valley , a region of the Rocky Mountain Trench near present-day Radium Hot Springs , British Columbia, then traveled south. Despite such efforts, in 1846, Britain ceded all claim to Columbia District lands south of the 49th parallel to the United States; as resolution to the Oregon boundary dispute by the Oregon Treaty . Thousands passed through

4950-540: The Culebra Cut , valued at about $ 1.00 per cubic yard. The United States also paid the new country of Panama $ 10 million and a $ 250,000 payment each following year. In 1921, Colombia and the United States entered into the Thomson–Urrutia Treaty , in which the United States agreed to pay Colombia $ 25 million: $ 5 million upon ratification, and four $ 5 million annual payments, and grant Colombia special privileges in

5100-709: The Federal District , Morelos , Puebla , Oaxaca , and Chiapas . In Central America, it continues through southern Guatemala , southwestern Honduras , western Nicaragua , western/southwestern Costa Rica , and southern Panama . The divide reaches its lowest natural point in Central America at the Isthmus of Rivas at 47 metres (154 ft) in Nicaragua. In Panama, the Canal cuts through it at 26 metres (85 ft). The Divide continues into South America , where it follows

5250-877: The Front Range of Colorado, the Wind River Range and Big Horn Mountains of Wyoming , the Absaroka - Beartooth ranges and Rocky Mountain Front of Montana and the Clark Range of Alberta . Central ranges of the Rockies include the La Sal Range along the Utah -Colorado border, the Abajo Mountains and Henry Mountains of Southeastern Utah, the Uinta Range of Utah and Wyoming, and

5400-597: The Hay–Herrán Treaty was signed by United States Secretary of State John M. Hay and Colombian Chargé Tomás Herrán . For $ 10 million and an annual payment, it would have granted the United States a renewable lease in perpetuity from Colombia on the land proposed for the canal. The treaty was ratified by the US Senate on 14 March 1903, but the Senate of Colombia unanimously rejected the treaty since it had become significantly unpopular in Bogotá due to concerns over insufficient compensation, threat to sovereignty, and perpetuity. Roosevelt changed tactics, based in part on

5550-416: The Illinois Central Railroad , as chief engineer of the Panama Canal Project. Overwhelmed by the disease-plagued country and forced to use often dilapidated French infrastructure and equipment, as well as being frustrated by the overly bureaucratic ICC, Wallace resigned abruptly in June 1905. The ICC brought on a new chairman, Theodore P. Shonts , and a new chief engineer was appointed, John Frank Stevens ,

5700-407: The International Hydrographic Organization (in its current unapproved working edition only of Limits of Oceans and Seas ) defines the Hudson Bay, with its outlet extending from 62.5 to 66.5 degrees north (just a few miles south of the Arctic Circle ) as being part of the Arctic Ocean, specifically "Arctic Ocean Subdivision 9.11." This hydrological apex of North America status of Triple Divide Peak

5850-441: The Laramide orogeny from between 80 and 55 Ma. For the Canadian Rockies, the mountain building is analogous to pushing a rug on a hardwood floor: the rug bunches up and forms wrinkles (mountains). In Canada, the terranes and subduction are the foot pushing the rug, the ancestral rocks are the rug, and the Canadian Shield in the middle of the continent is the hardwood floor. Further south, an unusual subduction may have caused

6000-414: The Liard River and east of the Trench , or in the northeastern foothills of the Brooks Range / British Mountains that face the Beaufort Sea coasts between the Canning River and the Firth River across the Alaska - Yukon border. Its southernmost point is near the Albuquerque area adjacent to the Rio Grande rift and north of the Sandia–Manzano Mountain Range . Being the easternmost portion of

6150-463: The Mallarino–Bidlack Treaty of 1846, and actively supported the separation of Panama from Colombia . Shortly after recognizing Panama, he signed a treaty with the new Panamanian government under terms similar to the Hay–Herrán Treaty. On 2 November 1903, US warships blocked sea lanes against possible Colombian troop movements en route to put down the Panama rebellion. Panama declared independence on 3 November 1903. The United States quickly recognized

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6300-425: The Mallarino–Bidlack Treaty , negotiated between the US and New Granada, granted the United States transit rights and the right to intervene militarily in the isthmus. In 1848, the discovery of gold in California , on the West Coast of the United States, generated renewed interest in a canal crossing between the Atlantic and Pacific oceans. William Henry Aspinwall , who had won the federal subsidy to build and operate

6450-405: The Muskwa Ranges , Hart Ranges (collectively called the Northern Rockies ) and Continental Ranges . Other more northerly mountain ranges of the eastern Canadian Cordillera continue beyond the Liard River valley, including the Selwyn , Mackenzie and Richardson Mountains in Yukon as well as the British Mountains / Brooks Range in Alaska , but those are not officially recognized as part of

6600-525: The North American Cordillera , the Rockies are distinct from the tectonically younger Cascade Range and Sierra Nevada , which both lie farther to its west. The Rockies formed 55 million to 80 million years ago during the Laramide orogeny , in which a number of plates began sliding underneath the North American plate . The angle of subduction was shallow, resulting in a broad belt of mountains running down western North America. Since then, further tectonic activity and erosion by glaciers have sculpted

6750-423: The Panama Canal Authority (ACP) assumed command of the waterway. The Panama Canal remains one of the chief revenue sources for Panama. Before this handover, the government of Panama held an international bid to negotiate a 25-year contract for operation of the container shipping ports located at the canal's Atlantic and Pacific outlets. The contract was not affiliated with the ACP or Panama Canal operations and

6900-432: The Pinedale Glaciation , which perhaps remained at full glaciation until 15,000–20,000 years ago. All of these geological processes exposed a complex set of rocks at the surface. For example, volcanic rock from the Paleogene and Neogene periods (66 million – 2.6 million years ago) occurs in the San Juan Mountains and in other areas. Millennia of severe erosion in the Wyoming Basin transformed intermountain basins into

7050-475: The Republic of New Granada entered into a contract for the construction of a canal across the Isthmus of Darien (Isthmus of Panama). They referred to it as the Atlantic and Pacific Canal, and it was a wholly British endeavor. Projected for completion in five years, the plan was never carried out. At nearly the same time, other ideas were floated, including a canal (and/or a railroad) across Mexico's Isthmus of Tehuantepec . That did not develop, either. In 1846,

7200-449: The Rockies , are a major mountain range and the largest mountain system in North America . The Rocky Mountains stretch 3,000 miles (4,800 kilometers) in straight-line distance from the northernmost part of Western Canada , to New Mexico in the Southwestern United States . Depending on differing definitions between Canada and the U.S., its northern terminus is located either in northern British Columbia 's Terminal Range south of

7350-400: The Teton Range of Wyoming and Idaho. The western edge of the Rockies includes ranges such as the Wasatch near Salt Lake City , the San Juan Mountains of New Mexico and Colorado, the Bitterroots along the Idaho-Montana border, and the Sawtooths in central Idaho. The Great Basin and Columbia River Plateau separate these subranges from distinct ranges further to the west. In Canada,

7500-430: The United States in northwestern Montana , at the boundary between Waterton Lakes National Park and Glacier National Park . In Canada, it forms the western boundary of Waterton Lakes National Park, and in the US bisects Glacier National Park. Further south, the Divide forms the backbone of the Rocky Mountain Front (Front Range) in the Bob Marshall Wilderness , heads south towards Helena and Butte , then west past

7650-426: The cargo ship SS  Ancon . The opening of the Panama Canal in 1914 caused a severe drop in traffic along Chilean ports due to shifts in maritime trade routes, despite the closure of the canal for nearly seven months after a landslide in the Culebra Cut on 18 September 1915. The burgeoning sheep farming business in southern Patagonia suffered a significant setback by the change in trade routes, as did

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7800-535: The "Rockies", becoming the first Europeans to report on this uncharted mountain range. Sir Alexander Mackenzie (1764 – March 11, 1820) became the first European to cross the Rocky Mountains in 1793. He found the upper reaches of the Fraser River and reached the Pacific coast of what is now Canada on July 20 of that year, completing the first recorded transcontinental crossing of North America north of Mexico. He arrived at Bella Coola, British Columbia , where he first reached saltwater at South Bentinck Arm, an inlet of

7950-655: The 30 million cu yd (23 million m ) excavated by the French. As quickly as possible, the Americans replaced or upgraded the old, unusable French equipment with new construction equipment that was designed for a much larger and faster scale of work. 102 large, railroad-mounted steam shovels were purchased, 77 from Bucyrus-Erie , and 25 from the Marion Power Shovel Company . These were joined by enormous steam-powered cranes, giant hydraulic rock crushers , concrete mixers , dredges , and pneumatic power drills, nearly all of which were manufactured by new, extensive machine-building technology developed and built in

8100-452: The Americas in order to ease the voyage for ships traveling between Spain and Peru. The Spanish were seeking to gain a military advantage over the Portuguese. In 1668, the English physician and philosopher Sir Thomas Browne speculated in his encyclopedic work, Pseudodoxia Epidemica , that "some Isthmus have been eaten through by the Sea, and others cut by the spade: And if the policy would permit, that of Panama in America were most worthy

8250-410: The Arctic Circle, the Continental Divide's geographic path runs through Arctic Alaska , where it reaches its more northerly point close to the U.S.-Canada border near the Beaufort Sea. The Divide zig-zags southwardly over Yukon , and forms part of the boundary between Yukon and the Northwest Territories in the Mackenzie Mountains . It then proceeds through the Northern British Columbia Interior via

8400-434: The Arctic Ocean watershed from the Hudson Bay watershed. Another, mainly non-mountainous, divide, the Laurentian Divide (also sometimes called the Northern Divide), further separates the Hudson Bay - Arctic Ocean drainage region from the Atlantic watershed region. Secondary divides separate the watersheds that flow into the Great Lakes and Saint Lawrence River (ultimately into the Atlantic) from watersheds that flow to

8550-408: The Atlantic more than to the Arctic Ocean. The channels to the north of Hudson Bay are largely cut off by Baffin Island from the Arctic, so much of the water that enters it mixes with the Atlantic to the east via Hudson Strait rather than north into the Arctic. The result is that most of the ice flowing down the Saskatchewan Glacier eventually ends up as water in the Atlantic Ocean. If Hudson Bay

8700-427: The California and Alaska gold rushes combined and was important in the financing of the Union Army during the American Civil War . The transcontinental railroad was completed in 1869, and Yellowstone National Park was established as the world's first national park in 1872. Meanwhile, a transcontinental railroad in Canada was originally promised in 1871. Though political complications pushed its completion to 1885,

8850-400: The Canal Zone. In return, Colombia recognized Panama as an independent nation. The US formally took control of the canal property on 4 May 1904, inheriting from the French a depleted workforce and a vast jumble of buildings, infrastructure, and equipment, much of it in poor condition. A US government commission, the Isthmian Canal Commission (ICC), was established to oversee construction; it

9000-429: The Chagres River above Gatun Lake. Completed in 1935, the dam created Madden Lake (later Alajuela Lake), which provides additional water storage for the canal. In 1939, construction began on a further major improvement: a new set of locks large enough to carry the larger warships that the United States was building at the time and planned to continue building. The work proceeded for several years, and significant excavation

9150-407: The Colombians being unable to put down the Panamanian rebellion and expel the United States troops occupying what today is the independent nation of Panama. On 6 November 1903, Philippe Bunau-Varilla, as Panama's ambassador to the United States, signed the Hay–Bunau-Varilla Treaty , granting rights to the United States to build and indefinitely administer the Panama Canal Zone and its defenses. This

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9300-405: The Continental Divide in Wyoming. The Panama Canal has this same feature, but is man-made. Both the Chagres and Gatun rivers flow into Gatun Lake , which empties to both oceans. Several small lakes along the Divide in the Rocky Mountains between Alberta and British Columbia flow into both provinces and thus into both the Arctic and Pacific Oceans. An example is the " Committee's Punch Bowl ",

9450-414: The Divide or the other by their lowest perimeter pass; in other words, an assignment is made by determining how the drainage would occur if the basin were to be progressively filled with water until it overflowed. Large-scale maps, such as those on this page, often show double divide lines when endorheic basins are involved. However, the detailed USGS topographic maps of the United States generally show only

9600-468: The Divide through the U.S. from the Mexico–US border to the Canada–US border . The trail itself is a corridor of pathways; that is, dedicated footpaths or back roads, either on or near the Continental Divide. A less-developed Canadian extension called the Great Divide Trail continues through five national parks and six provincial parks , ending at Kakwa Lake in east-central British Columbia. Many endorheic regions in North and South America complicate

9750-412: The French manager of the New Panama Canal Company, eventually managed to persuade Lesseps that a lock-and-lake canal was more realistic than a sea-level canal. The Comité Technique, a high level technical committee, was formed by the Compagnie Nouvelle to review the studies and work—that already finished and that still ongoing—and come up with the best plan for completing the canal. The committee arrived on

9900-447: The Gulf of Mexico (also part of the Atlantic Ocean) via the Missouri-Mississippi-Ohio river system . Another secondary divide follows the Appalachian chain, which separates those streams and rivers that flow directly into the Atlantic Ocean from those that exit via the Ohio and Mississippi Rivers. Triple Divide Peak in Glacier National Park , Montana, is the point where two of the principal continental divides in North America converge,

10050-534: The Isthmus in February 1896 and went immediately, quietly and efficiently about their work of devising the best possible canal plan, which they presented on 16 November 1898. Many aspects of the plan were similar in principle to the canal that was finally built by the Americans in 1914. It was a lock canal with two high level lakes to lift ships up and over the Continental Divide. Double locks would be 738 feet long and about 30 feet deep (225 m × 9 m); one chamber of each pair would be 82 feet (25 m) wide,

10200-407: The Isthmus, started the canal and then left Congress not to debate the canal, but to debate me." Several parties in the United States called this an act of war on Colombia: The New York Times described the support given by the United States to Bunau-Varilla as an "act of sordid conquest". The New York Evening Post called it a "vulgar and mercenary venture". The US maneuvers are often cited as

10350-571: The Liard River in British Columbia (at 59° N) and the Rio Grande in New Mexico (at 35° N). Prairie occurs at or below 550 metres (1,800 ft), while the highest peak in the range is Mount Elbert at 4,400 metres (14,440 ft). Precipitation ranges from 250 millimetres (10 in) per year in the southern valleys to 1,500 millimetres (60 in) per year locally in the northern peaks. Average January temperatures can range from −7 °C (20 °F) in Prince George, British Columbia, to 6 °C (43 °F) in Trinidad, Colorado . Therefore, there

10500-430: The Native American cultures. Native American populations were extirpated from most of their historical ranges by disease, warfare, habitat loss (eradication of the bison), and continued assaults on their culture. In 1739, French fur traders Pierre and Paul Mallet, while journeying through the Great Plains, discovered a range of mountains at the headwaters of the Platte River , which local American Indian tribes called

10650-529: The Northern Rockies surrounding Tumbler Ridge, British Columbia . Abandoned mines with their wakes of mine tailings and toxic wastes dot the Rocky Mountain landscape. In one major example, eighty years of zinc mining profoundly polluted the river and bank near Eagle River in north-central Colorado. High concentrations of the metal carried by spring runoff harmed algae , moss , and trout populations. An economic analysis of mining effects at this site revealed declining property values, degraded water quality, and

10800-539: The Pacific Ocean. The Lewis and Clark Expedition (1804–1806) was the first scientific reconnaissance of the Rocky Mountains. Specimens were collected for contemporary botanists, zoologists, and geologists. The expedition was said to have paved the way to (and through) the Rocky Mountains for European-Americans from the East, although Lewis and Clark met at least 11 European-American mountain men during their travels. Mountain men , primarily French, Spanish, and British, roamed

10950-509: The Pacific mail steamships at around the same time, benefited from the gold discovery. Aspinwall's route included steamship legs from New York City to Panama, and from Panama to California, with an overland portage through Panama. This route with an overland leg in Panama was soon frequently traveled, as it provided one of the fastest connections between San Francisco, California, and the East Coast cities, about 40 days' transit in total. Nearly all

11100-512: The Pacific side is about a third of a degree east of the Colón end on the Atlantic side. Still, in formal nautical communications, the simplified directions "southbound" and "northbound" are used. The canal consists of artificial lakes , several improved and artificial channels, and three sets of locks . An additional artificial lake, Alajuela Lake (known during the American era as Madden Lake), acts as

11250-476: The Panama Railway) to cross the isthmus; it opened in 1855. This overland link became a vital piece of Western Hemisphere infrastructure, greatly facilitating trade. The later canal route was constructed parallel to it, as it had helped clear dense forests. An all-water route between the oceans was still the goal. In 1855, William Kennish , a Manx -born engineer working for the United States government, surveyed

11400-655: The Rockies by the Geological Survey of Canada , although the Geological Society of America definition does consider them parts of the Rocky Mountains system as the "Arctic Rockies". The Continental Divide of the Americas is in the Rocky Mountains and designates the line at which waters flow either to the Atlantic or Pacific Oceans. Triple Divide Peak (2,440 m or 8,020 ft) in Glacier National Park

11550-458: The Rockies into dramatic peaks and valleys. At the end of the last ice age , humans began inhabiting the mountain range. After explorations of the range by Europeans, such as Sir Alexander Mackenzie , and Anglo-Americans, such as the Lewis and Clark Expedition , natural resources such as minerals and fur drove the initial economic exploitation of the mountains, although the range itself never experienced

11700-518: The Rockies, and are shown along the Dakota Hogback , an early Cretaceous sandstone formation running along the eastern flank of the modern Rockies. Just after the Laramide orogeny, the Rockies were like Tibet : a high plateau, probably 6,000 metres (20,000 ft) above sea level. In the last sixty million years, erosion stripped away the high rocks, revealing the ancestral rocks beneath, and forming

11850-572: The Rocky Mountains from 1720 to 1800 seeking mineral deposits and furs. The fur-trading North West Company established Rocky Mountain House as a trading post in what is now the Rocky Mountain Foothills of present-day Alberta in 1799, and their business rivals the Hudson's Bay Company established Acton House nearby. These posts served as bases for most European activity in the Canadian Rockies in

12000-592: The Rocky Mountains is one of more rapid change. The Spanish explorer Francisco Vázquez de Coronado —with a group of soldiers and missionaries marched into the Rocky Mountain region from the south in 1540. In 1610, the Spanish founded the city of Santa Fe , the oldest continuous seat of government in the United States, at the foot of the Rockies in present-day New Mexico. The introduction of the horse, metal tools, rifles, new diseases, and different cultures profoundly changed

12150-604: The Rocky Mountains on the Oregon Trail beginning in the 1840s. The Mormons began settling near the Great Salt Lake in 1847. From 1859 to 1864, gold was discovered in Colorado, Idaho, Montana, and British Columbia, sparking several gold rushes bringing thousands of prospectors and miners to explore every mountain and canyon and to create the Rocky Mountains' first major industry. The Idaho gold rush alone produced more gold than

12300-532: The Rocky Mountains were formed before the mountains were raised by tectonic forces. The oldest rock is Precambrian metamorphic rock that forms the core of the North American continent. There is also Precambrian sedimentary argillite , dating back to 1.7 billion years ago. During the Paleozoic , western North America lay underneath a shallow sea, which deposited many kilometers of limestone and dolomite . In

12450-404: The U.S. portion of the mountain range, apex predators such as grizzly bears and wolf packs had been extirpated from their original ranges, but have partially recovered due to conservation measures and reintroduction . Other recovering species include the bald eagle and the peregrine falcon . Since the last great ice age, the Rocky Mountains were home first to indigenous peoples including

12600-453: The US army troops that were supporting the Panamanian rebels. The reason an army of conscripts was sent was that it was the best response the Colombians could muster, as Colombia still was recovering from a civil war between Liberals and Conservatives from October 1899, to November 1902, known as the " Thousand Days War ". The US was fully aware of these conditions and even incorporated them into

12750-710: The United Kingdom and the United States over the next few decades failed to settle upon a compromise boundary and the Oregon Dispute became important in geopolitical diplomacy between the British Empire and the new American Republic. In 1841, James Sinclair , Chief Factor of the Hudson's Bay Company, guided some 200 settlers from the Red River Colony west to bolster settlement around Fort Vancouver in an attempt to retain

12900-684: The United States to hand over the canal to Panama increased after the Suez Crisis in 1956, when the United States used financial and diplomatic pressure to force France and the UK to abandon their attempt to retake control of the Suez Canal , previously nationalized by the Nasser regime in Egypt. Panamanian unrest culminated in riots on Martyr's Day , 9 January 1964, when about 20 Panamanians and 3–5 US soldiers were killed. A decade later, in 1974, negotiations toward

13050-554: The United States, though these rights did not include possession and also included obligations to Britain and Russia concerning their claims in the same region. After 1802, fur traders and explorers ushered in the first widespread American presence in the Rockies south of the 49th parallel. The more famous of these include William Henry Ashley , Jim Bridger , Kit Carson , John Colter , Thomas Fitzpatrick , Andrew Henry , and Jedediah Smith . On July 24, 1832, Benjamin Bonneville led

13200-496: The United States. The railroad also had to be comprehensively upgraded with heavy-duty, double-tracked rails over most of the line to accommodate new rolling stock . In many places, the new Gatun Lake flooded over the original rail line, and a new line had to be constructed above Gatun Lake's waterline. Between 1912 and 1914 there was a controversy about the tolls for the canal . In 1907, Stevens resigned as chief engineer. His replacement, appointed by President Theodore Roosevelt,

13350-560: The attempt: it being but few miles over, and would open a shorter cut unto the East Indies and China". Given the strategic location of Panama, and the potential of its narrow isthmus separating two great oceans, other trade links in the area were attempted over the years. One early example of this was ill-fated Darien scheme , launched by the Kingdom of Scotland in 1698 to set up an overland trade route. Generally inhospitable conditions thwarted

13500-509: The canal was completed in 1914, 401 years after Panama was first crossed overland by the Europeans in Vasco Núñez de Balboa 's party of conquistadores . The United States spent almost $ 500 million (roughly equivalent to $ 15.2 billion in 2023) to finish the project. This was by far the largest American engineering project to date. The canal was formally opened on 15 August 1914, with the passage of

13650-616: The canal. In 2017, it took ships an average of 11.38 hours to pass between the canal's two outer locks. The American Society of Civil Engineers has ranked the Panama Canal one of the Seven Wonders of the Modern World . The earliest record regarding a canal across the Isthmus of Panama was in 1534, when Charles V , Holy Roman Emperor and King of Spain, ordered a survey for a route through

13800-406: The canal. Locks then lower the ships at the other end. An average of 200,000,000 L (52,000,000 US gal) of fresh water is used in a single passing of a ship. The canal is threatened by low water levels during droughts. The Panama Canal shortcut greatly reduces the time for ships to travel between the Atlantic and Pacific oceans, enabling them to avoid the lengthy, hazardous route around

13950-597: The classic example of US gunboat diplomacy in Latin America, and the best illustration of what Roosevelt meant by the old African adage, "Speak softly and carry a big stick [and] you will go far." After the revolution in 1903, the Republic of Panama became a US protectorate until 1939. In 1904, the United States purchased the French equipment and excavations, including the Panama Railroad , for US$ 40 million, of which $ 30 million related to excavations completed, primarily in

14100-428: The coal bed, and separating the gas from the water; or injecting water to fracture the coal to release the gas (so-called hydraulic fracturing ). Agriculture and forestry are major industries. Agriculture includes dryland and irrigated farming and livestock grazing. Livestock are frequently moved between high-elevation summer pastures and low-elevation winter pastures, a practice known as transhumance . Every year

14250-575: The construction of tunnels and locks. A second Isthmian exploratory visit began on 6 December 1877, where two routes were explored in Panama, the San Blas route and a route from Bahía Limón to Panama City, the current Canal route. The French had achieved success in building the Suez Canal in the Middle East. While it was a lengthy project, they were encouraged to plan for a canal to cross the Panamanian isthmus. Wyse went to Bogotá and on 20 March 1878, signed

14400-665: The continental divide to connect Gatun Lake to the Pacific Panama Canal locks . On 10 October 1913, President Woodrow Wilson sent a signal from the White House by telegraph which triggered the explosion that destroyed the Gamboa Dike. This flooded the Culebra Cut, thereby joining the Atlantic and Pacific oceans via the Panama Canal. Alexandre La Valley (a floating crane built by Lobnitz & Company and launched in 1887)

14550-594: The current landscape of the Rockies. Periods of glaciation occurred from the Pleistocene Epoch (1.8 million – 70,000 years ago) to the Holocene Epoch (fewer than 11,000 years ago). These ice ages left their mark on the Rockies, forming extensive glacial landforms, such as U-shaped valleys and cirques . Recent glacial episodes included the Bull Lake Glaciation , which began about 150,000 years ago, and

14700-459: The death rate was over 200 per month. Public health measures were ineffective because the role of the mosquito as a disease vector was then unknown. Conditions were downplayed in France to avoid recruitment problems, but the high mortality rate made it difficult to maintain an experienced workforce. Workers had to continually widen the main cut through the mountain at Culebra and reduce the angles of

14850-690: The early 19th century. Among the most notable are the expeditions of David Thompson , who followed the Columbia River to the Pacific Ocean. On his 1811 expedition, he camped at the junction of the Columbia River and the Snake River and erected a pole and notice claiming the area for the United Kingdom and stating the intention of the North West Company to build a fort at the site. By the Anglo-American Convention of 1818 , which established

15000-638: The economy of the Falkland Islands . Throughout this time, Ernest "Red" Hallen was hired by the Isthmian Canal Commission to document the progress of the work. In 1914, steam shovels from the Panama Canal were purchased and put to use in Chuquicamata copper mine of northern Chile. By the 1930s, water supply became an issue for the canal, prompting construction of the Madden Dam across

15150-527: The effort, and it was abandoned in April 1700. In 1788, Americans suggested that the Spanish should build the canal, since they controlled the colonies where it would be built. They said that this would be a less treacherous route for ships than going around the southern tip of South America, and that tropical ocean currents would naturally widen the canal after construction. During an expedition from 1788 to 1793, Alessandro Malaspina outlined plans for construction of

15300-502: The engineering and excavation work into three divisions: Atlantic, Central, and Pacific. The Atlantic Division, under Major William L. Sibert , was responsible for construction of the massive breakwater at the entrance to Bahía Limón , the Gatun locks , and their 3 + 1 ⁄ 2 -mile (5.6 km) approach channel, and the immense Gatun Dam. The Pacific Division, under Sydney B. Williamson (the only civilian member of this high-level team),

15450-412: The ensuing scandal, known as the Panama affair , some of those deemed responsible were prosecuted, including Gustave Eiffel . Lesseps and his son Charles were found guilty of misappropriation of funds and sentenced to five years' imprisonment. This sentence was later overturned, and the father, at age 88, was never imprisoned. In 1894, a second French company, the Compagnie Nouvelle du Canal de Panama,

15600-569: The first wagon train across the Rocky Mountains by using South Pass in the present State of Wyoming. Similarly, in the wake of Mackenzie's 1793 expedition, fur trading posts were established west of the Northern Rockies in a region of the northern Interior Plateau of British Columbia which came to be known as New Caledonia , beginning with Fort McLeod (today's community of McLeod Lake) and Fort Fraser , but ultimately focused on Stuart Lake Post (today's Fort St. James ). Negotiations between

15750-647: The form of glacial ice. That ice flows down the Athabasca Glacier to the Arctic Ocean via the Athabasca and Mackenzie rivers. Ice flowing west goes to the Pacific Ocean via Bryce Creek and the Bush and Columbia Rivers . Ice flowing down the Saskatchewan Glacier goes via the North Saskatchewan , Saskatchewan , and Nelson rivers into Hudson Bay . While Triple Divide Peak (or, alternatively, Snow Dome)

15900-419: The gold that was shipped out of California went by the fast Panama route. Several new and larger paddle steamers were soon plying this new route, including private steamship lines owned by American entrepreneur Cornelius Vanderbilt that made use of an overland route through Nicaragua, and the unfortunate SS Central America . In 1850, the United States began construction of the Panama Railroad (now called

16050-523: The growth of the Rocky Mountains in the United States, where the Farallon Plate dove at a shallow angle below the North American Plate . This low angle moved the focus of melting and mountain building much farther inland than the normal 300 to 500 kilometres (200 to 300 mi). Scientists hypothesize that the shallow angle of the subducting plate increased the friction and other interactions with

16200-608: The highest peaks in central North America. The range's highest peak is Mount Elbert in Colorado at 4,401 metres (14,440 feet) above sea level. Mount Robson in British Columbia, at 3,954 m (12,972 ft), is the highest peak in the Canadian Rockies . The eastern edge of the Rockies rises dramatically above the Interior Plains of central North America, including the Sangre de Cristo Mountains of New Mexico and Colorado ,

16350-499: The human population grew rapidly in the Rocky Mountain states between 1950 and 1990. The forty-year statewide increases in population range from 35% in Montana to about 150% in Utah and Colorado. The populations of several mountain towns and communities have doubled in the forty years 1972–2012. Jackson, Wyoming , increased 260%, from 1,244 to 4,472 residents, in those forty years. The rocks in

16500-538: The isthmus and issued a report on a route for a proposed Panama Canal. His report was published as a book entitled The Practicability and Importance of a Ship Canal to Connect the Atlantic and Pacific Oceans . In 1876, Lucien Napoléon Bonaparte Wyse and his chief assistant Armand Réclus, both officers and engineers of the French Navy , explored several routes in the Darien-Atrato regions and made proposals including

16650-524: The loss of recreational opportunities. The analysis also revealed that cleanup of the river could yield $ 2.3 million in additional revenue from recreation. In 1983, the former owner of the zinc mine was sued by the Colorado Attorney General for the $ 4.8 million cleanup costs; five years later, ecological recovery was considerable. The Rocky Mountains contain several sedimentary basins that are rich in coalbed methane . Coalbed methane

16800-588: The main Divide as determined by the overflow rule. Among other things, this eliminates the need to trace out the boundary for a basin that is very shallow and has a nebulous rim, such as the San Luis Closed Basin in Colorado and the basin of the lost streams of Idaho . Another rare exception occurs when a stream near a divide splits and flows in both directions, or a lake straddling the divide overflows in both directions. Examples of these are, respectively, North Two Ocean Creek and Isa Lake , both located on

16950-446: The mountains is a calque of an Algonquian name, specifically Plains Cree ᐊᓯᓃᐘᒋᐩ asinîwaciy (originally transcribed as-sin-wati ), literally "rocky mountain / alp". The first mention of their present name by a European was in the journal of Jacques Legardeur de Saint-Pierre in 1752, where they were called " montagnes de Roche ". Another name given to the place by the Cree

17100-796: The namesake community of Divide, Montana , through the Anaconda-Pintler Wilderness to the Bitterroot Range , where it forms the eastern third of the state boundary between Idaho and Montana. The Divide crosses into Wyoming within Yellowstone National Park and continues southeast around the Great Divide Basin , through the Sierra Madre Range into Colorado where it reaches its highest point in North America at

17250-456: The new nation. This happened so quickly that by the time the Colombian government in Bogotá launched a response to the Panamanian uprising US troops had already entered the rebelling province. The Colombian troops dispatched to Panama were hastily assembled conscripts with little training. While these conscripts may have been able to defeat the Panamanian rebels, they would not have been able to defeat

17400-571: The other 59 ft (18 m). There would be eight sets of locks, two at Bohio Soldado and two at Obispo on the Atlantic side; one at Paraiso, two at Pedro Miguel, and one at Miraflores on the Pacific. Artificial lakes would be formed by damming the Chagres River at Bohio and Alhajuela, providing both flood control and electric power. At this time, US President Theodore Roosevelt and the United States Senate were interested in establishing

17550-493: The passage of Panamax ships. A third, wider lane of locks was constructed between September 2007 and May 2016. The expanded waterway began commercial operation on 26 June 2016. The new locks allow transit of larger, Neopanamax ships. Annual traffic has risen from about 1,000 ships in 1914, when the canal opened, to 14,702 vessels in 2008, for a total of 333.7 million Panama Canal/Universal Measurement System (PC/UMS) tons . By 2012, more than 815,000 vessels had passed through

17700-704: The peaks of the Andes Mountains , traversing western Colombia , central Ecuador , western and southwestern Peru , and eastern Chile (essentially conforming to the Chile- Bolivia and Chile- Argentina boundaries), southward to Cabo San Diego at the southern end of Patagonia and Tierra del Fuego . The Divide passes through the Punta Cancanan Pass in Peru at 4,700 metres (15,420 ft). The Arctic Divide or Northern Divide in northern and western Canada separates

17850-478: The plains in fall and winter for bison and to the mountains in spring and summer for fish, deer, elk, roots, and berries. In Colorado, along with the crest of the Continental Divide, rock walls that Native Americans built for driving game date back 5,400–5,800 years. A growing body of scientific evidence indicates that indigenous people had significant effects on mammal populations by hunting and on vegetation patterns through deliberate burning. Recent human history of

18000-486: The planning of the Panama intervention as the US acted as an arbitrator between the two sides. The peace treaty that ended the "Thousand Days War" was signed on the USS Wisconsin on 21 November 1902. While in port, the US also brought engineering teams to Panama with the peace delegation to begin planning the canal's construction before the US had even gained the rights to build the canal. All these factors would result in

18150-568: The primary Continental Divide and the Northern or Laurentian Divide. From this point, waters flow to the Pacific Ocean, the Atlantic Ocean via the Gulf of Mexico, and the Arctic Ocean via Hudson Bay . Most geographers, geologists, meteorologists, and oceanographers consider this point the hydrological apex of North America, as Hudson Bay is generally considered part of the Arctic Ocean. For example,

18300-563: The project. After two years of extensive work, the mosquito-spread diseases were nearly eliminated . Despite the monumental effort, about 5,600 workers died from disease and accidents during the US construction phase of the canal. Besides healthier and far better living conditions for the workers, another benefit given to American citizens working on the Canal was a medal for two years of service. Additional bars were added for each two-year period after that. Designed by Victor D. Brenner and featuring

18450-455: The railway, which was to prove crucial in transporting millions of tons of soil from the cut through the mountains to the dam across the Chagres River. Colonel William C. Gorgas had been appointed chief sanitation officer of the canal construction project in 1904. Gorgas implemented a range of measures to minimize the spread of deadly diseases, particularly yellow fever and malaria , which had recently been shown to be mosquito-borne following

18600-413: The rainy climate. In France, Lesseps kept the investment and supply of workers flowing long after it was obvious that the targets were not being met, but eventually the money ran out. The French effort went bankrupt in 1889 after reportedly spending US$ 287,000,000; an estimated 22,000 men died from disease and accidents, and the savings of 800,000 investors were lost. Work was suspended on May 15, and in

18750-685: The scenic areas of the Rocky Mountains draw millions of tourists. The main language of the Rocky Mountains is English. But there are also linguistic pockets of Spanish and indigenous languages. People from all over the world visit the sites to hike, camp, or engage in mountain sports . In the summer season, examples of tourist attractions are: In the United States: In Canada, the mountain range contains these national parks : Glacier National Park in Montana and Waterton Lakes National Park in Alberta border each other and are collectively known as Waterton-Glacier International Peace Park . In

18900-494: The service industries that support them. Tents and camps became ranches and farms, forts and train stations became towns, and some towns became cities. Economic resources of the Rocky Mountains are varied and abundant. Minerals found in the Rocky Mountains include significant deposits of copper, gold, lead, molybdenum , silver, tungsten , and zinc . The Wyoming Basin and several smaller areas contain significant reserves of coal, natural gas, oil shale , and petroleum. For example,

19050-729: The simple view of east or west, "ocean-bound" water flow. Several endorheic basins straddle or adjoin the Continental Divide, notably the Great Divide Basin in Wyoming, the Plains of San Agustin and the Animas Valley in New Mexico, the Guzmán Basin in New Mexico and Chihuahua, Mexico, and both the Bolsón de Mapimí and the Llanos el Salado in Mexico. Such basins can be, and routinely are, assigned to one side of

19200-451: The slopes to minimize landslides into the canal. Steam shovels were used in the construction of the canal, purchased from Bay City Industrial Works, a business owned by William L. Clements in Bay City, Michigan . Bucket chain excavators manufactured by both Alphonse Couvreux and Wehyer & Richemond and Buette were also used. Other mechanical and electrical equipment was limited in capabilities, and steel equipment rusted rapidly in

19350-510: The southern Rockies, near present-day Colorado, these ancestral rocks were disturbed by mountain building approximately 300 Ma , during the Pennsylvanian . This mountain-building produced the Ancestral Rocky Mountains. They consisted largely of Precambrian metamorphic rock forced upward through layers of the limestone laid down in the shallow sea. The mountains eroded throughout the late Paleozoic and early Mesozoic , leaving extensive deposits of sedimentary rock . Terranes began colliding with

19500-441: The southernmost tip of South America via the Drake Passage , the Strait of Magellan or the Beagle Channel . It is one of the largest and most difficult engineering projects ever undertaken. Colombia , France, and later the United States controlled the territory surrounding the canal during construction. France began work on the canal in 1881, but stopped because of lack of investors' confidence due to engineering problems and

19650-589: The summit of Grays Peak at 4,352 metres (14,278 ft). It crosses US Hwy 160 in southwestern Colorado at Wolf Creek Pass , where a line symbolizes the division. The Divide then proceeds south into western New Mexico , passing along the western boundary of the endorheic Plains of San Agustin. Although the Divide represents the height of land between watersheds, it does not always follow the highest ranges/peaks within each state or province. In Mexico , it passes through Chihuahua , Durango , Zacatecas , Aguascalientes , Jalisco , Guanajuato , Querétaro , México ,

19800-406: The then-current president they were popularly known as The Roosevelt Medal. A total of 7189 were ultimately issued, with a few people receiving as many as four bars. Certificates are available today. In 1905, a US engineering panel was commissioned to review the canal design, which had not been finalized. In January 1906 the panel, in a majority of eight to five, recommended to President Roosevelt

19950-451: The thick continental mass above it. Tremendous thrusts piled sheets of crust on top of each other, building the broad, high Rocky Mountain range. The current southern Rockies were forced upwards through the layers of Pennsylvanian and Permian sedimentary remnants of the Ancestral Rocky Mountains. Such sedimentary remnants were often tilted at steep angles along the flanks of the modern range; they are now visible in many places throughout

20100-433: The thousands of incoming workers. Stevens began the recruitment effort to entice thousands of workers from the United States and other areas to come to the Canal Zone to work. Workers from the Caribbean—called " Afro-Panamanians "—came in large numbers and many settled permanently. Stevens tried to provide accommodation in which the workers could work and live in reasonable safety and comfort. He also re-established and enlarged

20250-710: The tree-line for the Rocky Mountains, which varies from 3,700 m (12,000 ft) in New Mexico to 760 m (2,500 ft) at the northern end of the Rockies (near the Yukon). The U.S. Geological Survey defines ten forested zones in the Rockies. Zones in more southern, warmer, or drier areas are defined by the presence of pinyon pines / junipers , ponderosa pines , or oaks mixed with pines . In more northern, colder, or wetter areas, zones are defined by Douglas firs , Cascadian species (such as western hemlock ), lodgepole pines / quaking aspens , or firs mixed with spruce . Near tree-line, zones can consist of white pines (such as whitebark pine or bristlecone pine ); or

20400-528: The two mentioned previously and a third near Hibbing, Minnesota , where the Northern Divide intersects the Saint Lawrence Seaway divide. Since there is no true consensus on what a continental divide is, there is no real agreement on where the secondary triple points are located. However, the main Continental Divide described in this article is a far more distinctive geological feature than the others and its two main triple points are much more prominent. The Continental Divide National Scenic Trail (CDT) follows

20550-474: The water from the lake. Gatun Lake would connect to the Pacific through the mountains at the Gaillard (Culebra) Cut. Unlike Godin de Lépinay with the Congrès International d'Etudes du Canal Interocéanique, Stevens successfully convinced Roosevelt of the necessity and feasibility of this alternative scheme. The construction of a canal with locks required the excavation of more than 17 million cu yd (13 million m ) of material over and above

20700-408: The western edge of North America in the Mississippian (approximately 350 million years ago), causing the Antler orogeny . For 270 million years, the focus of the effects of plate collisions were near the edge of the North American Plate boundary, far to the west of the Rocky Mountain region. It was not until 80 Ma that these effects began reaching the Rockies. The current Rocky Mountains arose in

20850-538: The western edge of the Rockies is formed by the huge Rocky Mountain Trench , which runs the length of British Columbia from its beginning as the Kechika Valley on the south bank of the Liard River , to the middle Lake Koocanusa valley in northwestern Montana. The Canadian Rockies are defined by Canadian geographers as everything south of the Liard River and east of the Rocky Mountain Trench , and do not extend into Yukon , Northwest Territories or central British Columbia . They are divided into three main groups:

21000-691: The winter, skiing is the main attraction, with dozens of Rocky Mountain ski areas and resorts . The adjacent Columbia Mountains in British Columbia contain major resorts such as Panorama and Kicking Horse , as well as Mount Revelstoke National Park and Glacier National Park. There are numerous provincial parks in the British Columbia Rockies, the largest and most notable being Mount Assiniboine Provincial Park , Mount Robson Provincial Park , Northern Rocky Mountains Provincial Park , Kwadacha Wilderness Provincial Park , Stone Mountain Provincial Park and Muncho Lake Provincial Park . Panama Canal The Panama Canal (Spanish: Canal de Panamá )

21150-496: The work of Cuban epidemiologist, Carlos Finlay and American pathologist, Walter Reed . Investment was made in extensive sanitation projects, including city water systems, fumigation of buildings, spraying of insect-breeding areas with oil and larvicide, installation of mosquito netting and window screens, and elimination of stagnant water. Despite opposition from the commission (one member said his ideas were barmy), Gorgas persisted, and when Stevens arrived, he threw his weight behind

21300-400: Was US Army Major George Washington Goethals of the US Army Corps of Engineers . Soon to be promoted to lieutenant colonel and later to general, he was a strong, West Point -trained leader and civil engineer with experience in canals (unlike Stevens). Goethals directed the work in Panama to a successful conclusion in 1914, two years ahead of the target date of 10 June 1916. Goethals divided

21450-433: Was able to raise considerable funds in France as a result of the huge profits generated by his successful construction of the Suez Canal . Although the Panama Canal needed to be only 40 percent as long as the Suez Canal, it was much more of an engineering challenge because of the combination of tropical rain forests, debilitating climate, the need for canal locks, and the lack of any ancient route to follow. Lesseps wanted

21600-448: Was carried out on the new approach channels, but the project was canceled after World War II. After World War II, US control of the canal and the Canal Zone surrounding it became contentious; relations between Panama and the United States became increasingly tense. Many Panamanians felt that the Zone rightfully belonged to Panama; student protests were met by the fencing-in of the zone and an increased military presence there. Demands for

21750-471: Was created to take over the project. A minimal workforce of a few thousand people was employed primarily to comply with the terms of the Colombian Panama Canal concession, to run the Panama Railroad , and to maintain the existing excavation and equipment in salable condition. The company sought a buyer for these assets, with an asking price of US$ 109,000,000. In the meantime, they continued with enough activity to maintain their franchise. Phillipe Bunau-Varilla ,

21900-412: Was given control of the Panama Canal Zone, over which the United States exercised sovereignty. The commission reported directly to Secretary of War William Howard Taft and was directed to avoid the inefficiency and corruption that had plagued the French 15 years earlier. On 6 May 1904, President Theodore Roosevelt appointed John Findley Wallace , formerly chief engineer and finally general manager of

22050-402: Was similarly responsible for the Pacific 3-mile (4.8 km) breakwater in Panama Bay , the approach channel to the locks, and the Miraflores and Pedro Miguel locks and their associated dams and reservoirs. The Central Division, under Major David du Bose Gaillard of the United States Army Corps of Engineers , was assigned one of the most difficult parts: excavating the Culebra Cut through

22200-501: Was summoned to Washington; he declared a sea-level approach to be "an entirely untenable proposition". He argued in favor of a canal using a lock system to raise and lower ships from a large reservoir 85 ft (26 m) above sea level. This would create both the largest dam (Gatun Dam) and the largest human-made lake (Gatun Lake) in the world at that time. The water to refill the locks would be taken from Gatun Lake by opening and closing enormous gates and valves and letting gravity propel

22350-415: Was the first self-propelled vessel to transit the canal from ocean to ocean. This vessel crossed the canal from the Atlantic in stages during construction, finally reaching the Pacific on 7 January 1914. SS Cristobal (a cargo and passenger ship built by Maryland Steel , and launched in 1902 as SS Tremont ) on 3 August 1914, was the first ship to transit the canal from ocean to ocean. The construction of

22500-434: Was won by the firm Hutchison Whampoa , a Hong Kong–based shipping interest owned by Li Ka-shing . While globally the Atlantic Ocean is east of the isthmus and the Pacific is west, the general direction of the canal passage from the Atlantic to the Pacific is from northwest to southeast, because of the shape of the isthmus at the point the canal occupies. The Bridge of the Americas ( Spanish : Puente de las Américas ) at

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