Question: Stapleton international airport is in which US state?
Answer: Colorado

Stapleton International Airport was the primary airport serving Denver, Colorado, United States from 1929 to 1995. At different times it served as a hub for Continental Airlines, the original Frontier Airlines, People Express, Trans World Airlines, (TWA), United Airlines and Western Airlines.  Other airlines with smaller hub operations at Stapleton included Aspen Airways, the current version of Frontier Airlines and Rocky Mountain Airways with all three of these air carriers being based in Denver at the time. 

In 1995, Stapleton was replaced by Denver International Airport. It has since been decommissioned and the property redeveloped as a retail and residential neighborhood.

History

Stapleton opened on October 17, 1929, as Denver Municipal Airport. Its name became Stapleton Airfield after a 1944 expansion, in honor of Benjamin F. Stapleton, the city's mayor most of the time from 1923 to 1947, and the force behind the project when it began in 1928. Concourse A, the original building from 1929, was still in use when the airport closed. The airport was created by Ira Boyd Humphreys in 1919.

The March 1939 Official Aviation Guide shows nine weekday departures: seven United and two Continental. The April 1957 shows 38 United, 12 Continental, seven Braniff, seven Frontier, seven Western, five TWA and one Central. The jet age arrived during the summer of 1959 when Continental began operating Boeing 707 jetliners into Stapleton.

Runway 17/35 and a new terminal building opened in 1964. Concourse D was built in 1972. After deregulation three airlines had hubs at Stapleton: (Frontier Airlines, Continental Airlines, and United Airlines). To combat congestion runway 18/36 was added in the 1980s and the terminal was again expanded with the $250 million (or $58 million according to the New York Times ) 24 gate Concourse E opening in 1988, despite Denver's replacement airport already under construction.    When it closed in 1995 Stapleton had six runways (2 sets of 3 parallel runways) and five terminal concourses.

[http://digital.denverlibrary.org/cdm/ref/collection/p15330coll5/id/335 1938,] [https://www.flickr.com/photos/12530375@N08/8085581195/sizes/h/ 1956] and [https://www.flickr.com/photos/12530375@N08/15586694927/sizes/h/ 1984 airport diagrams]

In the early 1980s Stapleton was a hub for four airlines—United, Continental, Frontier and Western—making it one of the most competitive markets in the United States. Southwest Airlines and People Express tried low-cost service to Denver in the mid-1980s, but Southwest withdrew and People Express was acquired by Continental. 

In September 1982 the first revenue flight of the Boeing 767 arrived at Stapleton from O'Hare International Airport in Chicago.

During the energy boom of the early 1980s, several skyscrapers were built in downtown Denver, including Republic Plaza (Denver's tallest at 714′). Due to Stapleton's location 3 mi east of downtown, the Federal Aviation Administration imposed a building height restriction of 700'-715' (depending on where the building was). This allowed an unimpeded glide slope for runways (8L/26R) and (8R/26L). The height restriction was lifted in 1995, well after the city's skyscrapers had been erected.

Stapleton Airport was the site for Ted Fujita's studies of microbursts.

Continental Airlines closed its Stapleton pilot and flight attendant bases in October 1994, reducing operations and making United Airlines the airport's largest carrier.  On February 25, 1995, George Hosford, Air Traffic Controller, cleared the last plane (Continental Flight 34, to London Gatwick) to depart from Stapleton International Airport. This would also mark the end of Continental Airlines' use of Denver as its hub.

Decommissioning

By the 1980s, plans were under way to replace Stapleton with a new airport. Stapleton was plagued with a number of problems, including:
* inadequate separation between runways, leading to extremely long waits in bad weather
* little or no room for other airlines that proposed/wanted to use Stapleton for new destinations (an example of this was Southwest Airlines)
* a lawsuit over aircraft noise, brought by residents of the nearby Park Hill community
* legal threats by Adams County, Colorado, to block a runway extension into Rocky Mountain Arsenal lands

The Colorado General Assembly brokered a deal in 1985 to annex a plot of land in Adams County into the city of Denver, and use that land to build a new airport. Adams County voters approved the plan in 1988, and Denver voters approved the plan in a 1989 referendum.

After weeks of delays, a Continental Airlines flight, with a destination of London Gatwick, was the last flight to depart Stapleton. The airport was then shut down. A convoy of vehicles of many kinds (rental cars, baggage carts, fuel trucks, etc.) traveled to the new Denver International Airport (DEN), which officially opened for all operations the following morning. 

The runways at Stapleton were then marked with large yellow "X"s, which indicated it was no longer legal or safe for any aircraft to land there. The IATA and ICAO airport codes of DEN and KDEN were then transferred to the new DIA, to coincide with the same changes in airline and ATC computers, to ensure that flights to Denver would land at the new DIA. 

Originally Denver sought tenants for Stapleton's terminal and concourses, but these buildings proved ill-suited for alternative uses. A July 1997 hail storm punched roughly 4,000 holes in the roofs of the old terminal and concourses, causing severe water damage, which compelled the city to tear them down. However, the airport's 12-story control tower will be retained as a monument to the airport's history and is likely to have an added observation deck for tourists.

All of Stapleton's airport infrastructure has been removed, except for the former control tower. The final parking structure was torn down to make room for the "Central Park West" section of the housing development in May 2011.

Facilities

At the time of its decommissioning, the airport had the following runways:
* 17R/35L (11,500 ft)
* 17L/35R (12,000 ft)
* 8L/26R (8,599 ft)
* 8R/26L (10,004 ft)
* 7/25 (4,871 ft)
* 18/36 (7,750 ft)

The terminal had five concourses:
* Concourse A –  Commuter flights, Mesa Air Group, United Airlines
* Concourse B –  United Airlines
* Concourse C –  Continental Airlines, Frontier Airlines, Mexicana Airlines
* Concourse D –  Continental Express, Delta Air Lines, MarkAir, Pan American World Airways, Trans World Airlines
* Concourse E –  America West Airlines, American Airlines, Northwest Airlines, Sun Country, USAir

Continental Airlines was once headquartered in Stapleton, moving there in October 1937.  Airline president Robert F. Six arranged to have the headquarters moved to Denver from El Paso, Texas because he believed that the airline should have its headquarters in a large city with a potential base of customers.  At a 1962 press conference in the office of Mayor of Los Angeles Sam Yorty, Continental Airlines announced that it planned to move its headquarters to Los Angeles in July 1963. 

Redevelopment

While Denver International was being constructed, planners began to consider how the Stapleton site would be redeveloped. A private group of Denver civic leaders, the Stapleton Development Foundation, convened in 1990 and produced a master plan for the site in 1995, emphasizing a pedestrian-oriented design rather than the automobile-oriented designs found in many other planned developments.

Accidents and incidents

Several major air crashes involved Stapleton as the origin or destination airport, with four evidently occurring at Stapleton.

At Stapleton

* On July 11, 1961, United Airlines Flight 859, a DC-8-12 tail number N8040U, was destroyed after landing. Asymmetric thrust on engines 1 & 2 (left wing) forced a loss of control on the runway. The aircraft struck a maintenance vehicle, killing the driver. In the ensuing disaster, 17 of the DC-8's 122 occupants died.
* On August 7, 1975, Continental Airlines Flight 426 crashed due to windshear after taking off and climbing to 100 ft on runway 35L. Nobody was killed in the accident.
* On November 16, 1976, a Texas International DC-9-10 aircraft stalled after takeoff at Stapleton and crashed. The 81 passengers and 5 crewmembers suffered a total of 14 injured, but there were no deaths.
* On November 15, 1987, Continental Airlines Flight 1713, a DC-9-14 jetliner bound for Boise, Idaho, crashed on takeoff at Stapleton during a snowstorm. The probable cause of the crash was the failure of the flight crew to have the aircraft de-iced prior to take-off and the over-rotation of the aircraft on take-off. Twenty-eight of the plane's 82 occupants were killed.

A state of the United States of America is one of the 50 constituent political entities that shares its sovereignty with the United States federal government. Due to the shared sovereignty between each state and the federal government, Americans are citizens of both the federal republic and of the state in which they reside.  State citizenship and residency are flexible, and no government approval is required to move between states, except for persons covered by certain types of court orders (e.g., paroled convicts and children of divorced spouses who are sharing custody).

States range in population from just under 600,000 (Wyoming) to over 38 million (California), and in area from  (Rhode Island) to  (Alaska). Four states use the term commonwealth rather than state in their full official names.

States are divided into counties or county-equivalents, which may be assigned some local governmental authority but are not sovereign. County or county-equivalent structure varies widely by state. State governments are allocated power by the people (of each respective state) through their individual constitutions. All are grounded in republican principles, and each provides for a government, consisting of three branches: executive, legislative, and judicial. 

States possess a number of powers and rights under the United States Constitution; among them ratifying constitutional amendments. Historically, the tasks of local law enforcement, public education, public health, regulating intrastate commerce, and local transportation and infrastructure have generally been considered primarily state responsibilities, although all of these now have significant federal funding and regulation as well. Over time, the U.S. Constitution has been amended, and the interpretation and application of its provisions have changed. The general tendency has been toward centralization and incorporation, with the federal government playing a much larger role than it once did. There is a continuing debate over states' rights, which concerns the extent and nature of the states' powers and sovereignty in relation to the federal government and the rights of individuals.

States and their residents are represented in the federal Congress, a bicameral legislature consisting of the Senate and the House of Representatives. Each state is represented by two Senators, and at least one Representative, while additional representatives are distributed among the states in proportion to the most recent constitutionally mandated decennial census.  Each state is also entitled to select a number of electors to vote in the Electoral College, the body that elects the President of the United States, equal to the total of Representatives and Senators from that state. 

The Constitution grants to Congress  the authority to admit new states into the Union. Since the establishment of the United States in 1776, the number of states has expanded from the original 13 to 50. Alaska and Hawaii are the most recent states admitted, both in 1959.

The Constitution is silent on the question of whether states have the power to secede (withdraw from) from the Union. Shortly after the Civil War, the U.S. Supreme Court, in Texas v. White, held that a state cannot unilaterally do so.  

States of the United States

The 50 U.S. states (in alphabetical order), along with state flag and date each joined the union:

Governments

As each state is itself a sovereign entity, it reserves the right to organize its individual government in any way (within the broad parameters set by the U.S. Constitution) deemed appropriate by its people. As a result, while the governments of the various states share many similar features, they often vary greatly with regard to form and substance. No two state governments are identical.

Constitutions

The government of each state is structured in accordance with its individual constitution. Many of these documents are more detailed and more elaborate than their federal counterpart. The Constitution of Alabama, for example, contains 310,296 words — more than 40 times as many as the U.S. Constitution. In practice, each state has adopted a three-branch system of government, modeled after the federal government, and consisting of three branches (although the three-branch structure is not required): executive, legislative, and judicial. 

Executive

In each state, the chief executive is called the governor, who serves as both head of state and head of government. The governor may approve or veto bills passed by the state legislature, as well as push for the passage of bills supported by the party of the Governor. In 43 states, governors have line item veto power. 

Most states have a "plural executive" in which two or more members of the executive branch are elected directly by the people. Such additional elected officials serve as members of the executive branch, but are not beholden to the governor and the governor cannot dismiss them. For example, the attorney general is elected, rather than appointed, in 43 of the 50 U.S. states.

Legislative

The legislatures of 49 of the 50 states are made up of two chambers: a lower house (termed the House of Representatives, State Assembly, General Assembly or House of Delegates) and a smaller upper house, always termed the Senate. The exception is the unicameral Nebraska Legislature, which is composed of only a single chamber.

Most states have part-time legislatures, while six of the most populated states have full-time legislatures. However, several states with high population have short legislative sessions, including Texas and Florida. 

In Baker v. Carr (1962) and Reynolds v. Sims (1964), the U.S. Supreme Court held that all states are required to elect their legislatures in such a way as to afford each citizen the same degree of representation (the one person, one vote standard). In practice, most states choose to elect legislators from single-member districts, each of which has approximately the same population. Some states, such as Maryland and Vermont, divide the state into single- and multi-member districts, in which case multi-member districts must have proportionately larger populations, e.g., a district electing two representatives must have approximately twice the population of a district electing just one. If the governor vetoes legislation, all legislatures may override it, usually, but not always, requiring a two-thirds majority.

In 2013, there were a total of 7,383 legislators in the 50 state legislative bodies. They earned from $0 annually (New Mexico) to $90,526 (California). There were various per diem and mileage compensation. 

Judicial

States can also organize their judicial systems differently from the federal judiciary, as long as they protect the federal constitutional right of their citizens to procedural due process. Most have a trial level court, generally called a District Court or Superior Court, a first-level appellate court, generally called a Court of Appeal (or Appeals), and a Supreme Court. However, Oklahoma and Texas have separate highest courts for criminal appeals. In New York State the trial court is called the Supreme Court; appeals are then taken to the Supreme Court's Appellate Division, and from there to the Court of Appeals.

Most states base their legal system on English common law (with substantial indigenous changes and incorporation of certain civil law innovations), with the notable exception of Louisiana, a former French colony, which draws large parts of its legal system from French civil law.

Only a few states choose to have the judges on the state's courts serve for life terms. In most of the states the judges, including the justices of the highest court in the state, are either elected or appointed for terms of a limited number of years, and are usually eligible for re-election or reappointment.

Relationships

Among states

Each state admitted to the Union by Congress since 1789 has entered it on an equal footing with the original States in all respects. With the growth of states' rights advocacy during the antebellum period, the Supreme Court asserted, in Lessee of Pollard v. Hagan (1845), that the Constitution mandated admission of new states on the basis of equality.

Under Article Four of the United States Constitution, which outlines the relationship between the states, each state is required to give full faith and credit to the acts of each other's legislatures and courts, which is generally held to include the recognition of legal contracts and criminal judgments, and before 1865, slavery status. Regardless of the Full Faith and Credit Clause, some legal arrangements, such as professional licensure and marriages, may be state-specific, and until recently states have not been found by the courts to be required to honor such arrangements from other states. 

Such legal acts are nevertheless often recognized state-to-state according to the common practice of comity. States are prohibited from discriminating against citizens of other states with respect to their basic rights, under the Privileges and Immunities Clause. Under the Extradition Clause, a state must extradite people located there who have fled charges of "treason, felony, or other crimes" in another state if the other state so demands. The principle of hot pursuit of a presumed felon and arrest by the law officers of one state in another state are often permitted by a state. 

With the consent of Congress, states may enter into interstate compacts, agreements between two or more states. Compacts are frequently used to manage a shared resource, such as transportation infrastructure or water rights. 

With the federal government

Every state is guaranteed  a form of government that is grounded in republican principles, such as the consent of the governed.  This guarantee has long been at the fore-front of the debate about the rights of citizens vis-à-vis the government. States are also guaranteed protection from invasion, and, upon the application of the state legislature (or executive, if the legislature cannot be convened), from domestic violence. This provision was discussed during the 1967 Detroit riot, but was not invoked.

Since the early 20th century, the Supreme Court has interpreted the Commerce Clause of the Constitution of the United States to allow greatly expanded scope of federal power over time, at the expense of powers formerly considered purely states' matters. The Cambridge Economic History of the United States says, "On the whole, especially after the mid-1880s, the Court construed the Commerce Clause in favor of increased federal power."  In Wickard v. Filburn , the court expanded federal power to regulate the economy by holding that federal authority under the commerce clause extends to activities which may appear to be local in nature but in reality effect the entire national economy and are therefore of national concern. 

For example, Congress can regulate railway traffic across state lines, but it may also regulate rail traffic solely within a state, based on the reality that intrastate traffic still affects interstate commerce. In recent years, the Court has tried to place limits on the Commerce Clause in such cases as United States v. Lopez and United States v. Morrison.

Another example of congressional power is its spending power—the ability of Congress to impose taxes and distribute the resulting revenue back to the states (subject to conditions set by Congress).  An example of this is the system of federal aid for highways, which include the Interstate Highway System. The system is mandated and largely funded by the federal government, and also serves the interests of the states. By threatening to withhold federal highway funds, Congress has been able to pressure state legislatures to pass a variety of laws. An example is the nationwide legal drinking age of 21, enacted by each state, brought about by the National Minimum Drinking Age Act. Although some objected that this infringes on states' rights, the Supreme Court upheld the practice as a permissible use of the Constitution's Spending Clause in South Dakota v. Dole .

Admission into the Union

Article IV, Section 3, Clause 1 of the U.S. Constitution grants to Congress the authority to admit new states into the Union. Since the establishment of the United States in 1776, the number of states has expanded from the original 13 to 50. Each new state has been admitted on an equal footing with the existing states. It also forbids the creation of new states from parts of existing states without the consent of both the affected states and Congress. This caveat was designed to give Eastern states that still had Western land claims (there were 4 in 1787), to have a veto over whether their western counties could become states, and has served this same function since, whenever a proposal to partition an existing state or states in order that a region within might either join another state or to create a new state has come before Congress.

Most of the states admitted to the Union after the original 13 have been created from organized territories established and governed by Congress in accord with its plenary power under Article IV, Section 3, Clause 2.  The outline for this process was established by the Northwest Ordinance (1787), which predates the ratification of the Constitution. In some cases, an entire territory has become a state; in others some part of a territory has.

When the people of a territory make their desire for statehood known to the federal government, Congress may pass an enabling act authorizing the people of that territory to organize a constitutional convention to write a state constitution as a step towards admission to the Union. Each act details the mechanism by which the territory will be admitted as a state following ratification of their constitution and election of state officers. Although the use of an enabling act is a traditional historic practice, a number of territories have drafted constitutions for submission to Congress absent an enabling act and were subsequently admitted. Upon acceptance of that constitution, and upon meeting any additional Congressional stipulations, Congress has always admitted that territory as a state.

In addition to the original 13, six subsequent states were never an organized territory of the federal government, or part of one, before being admitted to the Union. Three were set off from an already existing state, two entered the Union after having been sovereign states, and one was established from unorganized territory:
*California, 1850, from land ceded to the United States by Mexico in 1848 under the terms of the Treaty of Guadalupe Hidalgo. 
*Kentucky, 1792, from Virginia (District of Kentucky: Fayette, Jefferson, and Lincoln counties)Michael P. Riccards, "Lincoln and the Political Question: The Creation of the State of West Virginia" Presidential Studies Quarterly, Vol. 27, 1997 [http://www.questia.com/PM.qst?a
o&d=5000522904 online edition]
*Maine, 1820, from Massachusetts (District of Maine)
*Texas, 1845, previously the Republic of Texas 
*Vermont, 1791, previously the Vermont Republic (also known as the New Hampshire Grants and claimed by New York) 
*West Virginia, 1863, from Virginia (Trans-Allegheny region counties) during the Civil War 

Congress is under no obligation to admit states, even in those areas whose population expresses a desire for statehood. Such has been the case numerous times during the nation's history. In one instance, Mormon pioneers in Salt Lake City sought to establish the state of Deseret in 1849. It existed for slightly over two years and was never approved by the United States Congress. In another, leaders of the Five Civilized Tribes (Cherokee, Chickasaw, Choctaw, Creek, and Seminole) in Indian Territory proposed to establish the state of Sequoyah in 1905, as a means to retain control of their lands.  The proposed constitution ultimately failed in the U.S. Congress. Instead, the Indian Territory, along with Oklahoma Territory were both incorporated into the new state of Oklahoma in 1907. The first instance occurred while the nation still operated under the Articles of Confederation. The State of Franklin existed for several years, not long after the end of the American Revolution, but was never recognized by the Confederation Congress, which ultimately recognized North Carolina's claim of sovereignty over the area. The territory comprising Franklin later became part of the Southwest Territory, and ultimately the state of Tennessee.

Additionally, the entry of several states into the Union was delayed due to distinctive complicating factors. Among them, Michigan Territory, which petitioned Congress for statehood in 1835, was not admitted to the Union until 1837, due to a boundary dispute the adjoining state of Ohio. The Republic of Texas requested annexation to the United States in 1837, but fears about potential conflict with Mexico delayed the admission of Texas for nine years.  Also, statehood for Kansas Territory was held up for several years (1854–61) due to a series of internal violent conflicts involving anti-slavery and pro-slavery factions.

Possible new states

Puerto Rico

Puerto Rico referred to itself as the "Commonwealth of Puerto Rico" in the English version of its constitution, and as "Estado Libre Asociado" (literally, Associated Free State) in the Spanish version.

As with any non-state territory of the United States, its residents do not have voting representation in the federal government. Puerto Rico has limited representation in the U.S. Congress in the form of a Resident Commissioner, a delegate with limited voting rights in the Committee of the Whole House on the State of the Union, and no voting rights otherwise. 

A non-binding referendum on statehood, independence, or a new option for an associated territory (different from the current status) was held on November 6, 2012. Sixty one percent (61%) of voters chose the statehood option, while one third of the ballots were submitted blank.  

On December 11, 2012, the Legislative Assembly of Puerto Rico enacted a concurrent resolution requesting the President and the Congress of the United States to respond to the referendum of the people of Puerto Rico, held on November 6, 2012, to end its current form of territorial status and to begin the process to admit Puerto Rico as a State. 

Washington, D.C.

The intention of the Founding Fathers was that the United States capital should be at a neutral site, not giving favor to any existing state; as a result, the District of Columbia was created in 1800 to serve as the seat of government. The inhabitants of the District do not have full representation in Congress or a sovereign elected government (they were allotted presidential electors by the 23rd amendment, and have a non-voting delegate in Congress).

Some residents of the District support statehood of some form for that jurisdiction—either statehood for the whole district or for the inhabited part, with the remainder remaining under federal jurisdiction.

Others

Various proposals to divide California, usually involving splitting the south half from the north or the urban coastline from the rest of the state, have been advanced since the 1850s.  Similarly, numerous proposals to divide New York, all of which involve to some degree the separation of New York City from the rest of the state, have been promoted over the past several decades.  The partitioning of either state is, at the present, highly unlikely.

Other even less likely possible new states are Guam and the Virgin Islands, both of which are unincorporated organized territories of the United States. Also, either the Northern Mariana Islands or American Samoa, an unorganized, unincorporated territory, could seek statehood.

Secession from the Union

The Constitution is silent on the issue of the secession of a state from the union. However, its predecessor document, the Articles of Confederation, stated that the United States "shall be perpetual." The question of whether or not individual states held the right to unilateral secession remained a difficult and divisive one until the American Civil War. In 1860 and 1861, eleven southern states seceded, but following their defeat in the American Civil War were brought back into the Union during the Reconstruction Era. The federal government never recognized the secession of any of the rebellious states. 

Following the Civil War, the United States Supreme Court, in Texas v. White, held that states did not have the right to secede and that any act of secession was legally void. Drawing on the Preamble to the Constitution, which states that the Constitution was intended to "form a more perfect union" and speaks of the people of the United States in effect as a single body politic, as well as the language of the Articles of Confederation, the Supreme Court maintained that states did not have a right to secede. However, the court's reference in the same decision to the possibility of such changes occurring "through revolution, or through consent of the States," essentially means that this decision holds that no state has a right to  unilaterally decide to leave the Union.

Commonwealths

Four states—Kentucky, Massachusetts, Pennsylvania, and Virginia —adopted Constitutions early in their post-colonial existence identifying themselves as commonwealths, rather than states. These commonwealths are states, but legally, each is a commonwealth because the term is contained in its constitution. As a result, "commonwealth" is used in all public and other state writings, actions or activities within their bounds.

The term, which refers to a state in which the supreme power is vested in the people, was first used in Virginia during the Interregnum, the 1649–60 period between the reigns of Charles I and Charles II during which parliament's Oliver Cromwell as Lord Protector established a republican government known as the Commonwealth of England. Virginia became a royal colony again in 1660, and the word was dropped from the full title. When Virginia adopted its first constitution on June 29, 1776, it was reintroduced.  Pennsylvania followed suit when it drew up a constitution later that year, as did Massachusetts, in 1780, and Kentucky, in 1792.

The U.S. territories of the Northern Marianas and Puerto Rico are also referred to as commonwealths. This designation does have a legal status different from that of the 50 states. Both of these commonwealths are unincorporated territories of the United States.

Origins of states' names

The 50 states have taken their names from a wide variety of languages. Twenty-four state names originate from Native American languages.  Of these, eight are from Algonquian languages, seven are from Siouan languages, three are from Iroquoian languages, one is from Uto-Aztecan languages and five others are from other indigenous languages.  Hawaii's name is derived from the Polynesian Hawaiian language.

Of the remaining names, 22 are from European languages: Seven from Latin (mainly Latinized forms of English names), the rest are from English, Spanish and French.  Eleven states are named after individual people, including seven named for royalty and one named after an American president. The origins of six state names are unknown or disputed. Several of the states that derive their names from (corrupted) names used for Native peoples, have retained the plural ending of "s".

Geography

Borders

The borders of the 13 original states were largely determined by colonial charters. Their western boundaries were subsequently modified as the states ceded their western land claims to the Federal government during the 1780s and 1790s. Many state borders beyond those of the original 13 were set by Congress as it created territories, divided them, and over time, created states within them. Territorial and new state lines often followed various geographic features (such as rivers or mountain range peaks), and were influenced by settlement or transportation patterns. At various times, national borders with territories formerly controlled by other countries (British North America, New France, New Spain including Spanish Florida, and Russian America) became institutionalized as the borders of U.S. states. In the West, relatively arbitrary straight lines following latitude and longitude often prevail, due to the sparseness of settlement west of the Mississippi River.

Once established, most state borders have, with few exceptions, been generally stable. Only two states, Missouri (Platte Purchase) and Nevada, grew appreciably after statehood. Several of the original states ceded land, over a several year period, to the Federal government, which in turn became the Northwest Territory, Southwest Territory, and Mississippi Territory. In 1791 Maryland and Virginia ceded land to create the District of Columbia (Virginia's portion was returned in 1847). In 1850, Texas ceded a large swath of land to the federal government. Additionally, Massachusetts and Virginia (on two occasions), have lost land, in each instance to form a new state.

There have been numerous other minor adjustments to state boundaries over the years due to improved surveys, resolution of ambiguous or disputed boundary definitions, or minor mutually agreed boundary adjustments for administrative convenience or other purposes. Occasionally the United States Congress or the United States Supreme Court have settled state border disputes. One notable example is the case New Jersey v. New York, in which New Jersey won roughly 90% of Ellis Island from New York in 1998. 

Regional grouping

States may be grouped in regions; there are endless variations and possible groupings. Many are defined in law or regulations by the federal government. For example, the United States Census Bureau defines four statistical regions, with nine divisions.  The Census Bureau region definition is "widely used … for data collection and analysis,""The National Energy Modeling System: An Overview 2003" (Report #:DOE/EIA-0581, October 2009). United States Department of Energy, Energy Information Administration. and is the most commonly used classification system.    Other multi-state regions are unofficial, and defined by geography or cultural affinity rather than by state lines.

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Stapleton International Airport
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Stapleton International Airport was the primary airport serving Denver , Colorado , United States from 1929 to 1995. At different times it served as a hub for Continental Airlines , the original Frontier Airlines , People Express , Trans World Airlines ( TWA ), United Airlines and Western Airlines . Other airlines with smaller hub operations at Stapleton included Aspen Airways , the current version of Frontier Airlines and Rocky Mountain Airways with all three of these air carriers being based in Denver at the time. [1]
In 1995, Stapleton was replaced by Denver International Airport . It has since been decommissioned and the property redeveloped as a retail and residential neighborhood.
Contents
7 External links
History
Looking west, January 1966. Only concourses A, B, and C existed then. A United Airlines Pilot Training Center was later built on the vacant land between the airport’s west boundary and the housing tracts.
Looking north, January 1966. Runway 35 became 35L, after 35R was built. The old United Airlines pilot training center buildings, on the airport proper, were still in operation. A UAL DC-8 pilot training flight has just made a missed approach, complete with its shadow.
USGS aerial photo of Stapleton International Airport looking north, June 1993, shortly before its closure. Runway 17R/35L crosses Interstate 70 at its midpoint.
Former Stapleton International Airport from the air (6 February 2006)
Two Convair 580s of the Denver-based Aspen Airways at Stapleton in 1986
Stapleton opened on October 17, 1929, as Denver Municipal Airport. Its name became Stapleton Airfield after a 1944 expansion, in honor of Benjamin F. Stapleton , the city’s mayor most of the time from 1923 to 1947, and the force behind the project when it began in 1928. Concourse A, the original building from 1929, was still in use when the airport closed. The airport was created by Ira Boyd Humphreys in 1919.
The March 1939 Official Aviation Guide shows nine weekday departures: seven United and two Continental. The April 1957 shows 38 United, 12 Continental, seven Braniff, seven Frontier, seven Western, five TWA and one Central. The jet age arrived during the summer of 1959 when Continental began operating Boeing 707 jetliners into Stapleton.
Runway 17/35 and a new terminal building opened in 1964. Concourse D was built in 1972. After deregulation three airlines had hubs at Stapleton: ( Frontier Airlines , Continental Airlines , and United Airlines ). To combat congestion runway 18/36 was added in the 1980s and the terminal was again expanded with the $250 million (or $58 million according to the New York Times [2] ) 24 gate Concourse E opening in 1988, despite Denver’s replacement airport already under construction. [3] [4] [5] When it closed in 1995 Stapleton had six runways (2 sets of 3 parallel runways) and five terminal concourses.
1938, 1956 and 1984 airport diagrams
In the early 1980s Stapleton was a hub for four airlines—United, Continental, Frontier and Western—making it one of the most competitive markets in the United States. Southwest Airlines and People Express tried low-cost service to Denver in the mid-1980s, but Southwest withdrew and People Express was acquired by Continental. [6]
In September 1982 the first revenue flight of the Boeing 767 arrived at Stapleton from O’Hare International Airport in Chicago.
During the energy boom of the early 1980s, several skyscrapers were built in downtown Denver, including Republic Plaza (Denver’s tallest at 714′). Due to Stapleton’s location 3 miles (4.8 km) east of downtown, the Federal Aviation Administration imposed a building height restriction of 700′-715′ (depending on where the building was). This allowed an unimpeded glide slope for runways (8L/26R) and (8R/26L). The height restriction was lifted in 1995, well after the city’s skyscrapers had been erected.
Stapleton Airport was the site for Ted Fujita ‘s studies of microbursts .
Continental Airlines closed its Stapleton pilot and flight attendant bases in October 1994, reducing operations and making United Airlines the airport’s largest carrier. [7] On February 25, 1995, George Hosford, Air Traffic Controller, cleared the last plane (Continental Flight 34, to London Gatwick) to depart from Stapleton International Airport. This would also mark the end of Continental Airlines’ use of Denver as its hub .
Decommissioning
By the 1980s, plans were under way to replace Stapleton with a new airport. Stapleton was plagued with a number of problems, including:
inadequate separation between runways, leading to extremely long waits in bad weather
little or no room for other airlines that proposed/wanted to use Stapleton for new destinations (an example of this was Southwest Airlines )
a lawsuit over aircraft noise , brought by residents of the nearby Park Hill community
legal threats by Adams County, Colorado , to block a runway extension into Rocky Mountain Arsenal lands
The Colorado General Assembly brokered a deal in 1985 to annex a plot of land in Adams County into the city of Denver, and use that land to build a new airport. Adams County voters approved the plan in 1988, and Denver voters approved the plan in a 1989 referendum.
After weeks of delays, a Continental Airlines flight, with a destination of London Gatwick , was the last flight to depart Stapleton. The airport was then shut down. A convoy of vehicles of many kinds (rental cars, baggage carts, fuel trucks, etc.) traveled to the new Denver International Airport (DEN) , which officially opened for all operations the following morning. [8]
The runways at Stapleton were then marked with large yellow “X”s, which indicated it was no longer legal or safe for any aircraft to land there. The IATA and ICAO airport codes of DEN and KDEN were then transferred to the new DIA, to coincide with the same changes in airline and ATC computers, to ensure that flights to Denver would land at the new DIA. [9]
Originally Denver sought tenants for Stapleton’s terminal and concourses, but these buildings proved ill-suited for alternative uses. A July 1997 hail storm punched roughly 4,000 holes in the roofs of the old terminal and concourses, causing severe water damage, which compelled the city to tear them down. However, the airport’s 12-story control tower will be retained as a monument to the airport’s history and is likely to have an added observation deck for tourists. [2]
All of Stapleton’s airport infrastructure has been removed, except for the former control tower. The final parking structure was torn down to make room for the “Central Park West” section of the housing development in May 2011.
Facilities
UAL Douglas DC-6 , N37514, code 5414, parked on the northwest maintenance ramp of Stapleton Airport, in September 1966.
Control tower at Denver’s Stapleton International Airport photographed from top level of close-in parking structure, 1995.
At the time of its decommissioning, the airport had the following runways:
17R/35L (11,500 ft)
Concourse E – America West Airlines , American Airlines , Northwest Airlines , Sun Country , USAir
Continental Airlines was once headquartered in Stapleton, moving there in October 1937. [10] Airline president Robert F. Six arranged to have the headquarters moved to Denver from El Paso, Texas because he believed that the airline should have its headquarters in a large city with a potential base of customers. [11] At a 1962 press conference in the office of Mayor of Los Angeles Sam Yorty , Continental Airlines announced that it planned to move its headquarters to Los Angeles in July 1963. [12]
Redevelopment
While Denver International was being constructed, planners began to consider how the Stapleton site would be redeveloped. A private group of Denver civic leaders, the Stapleton Development Foundation, convened in 1990 and produced a master plan for the site in 1995, emphasizing a pedestrian-oriented design rather than the automobile-oriented designs found in many other planned developments.
Accidents and incidents
Several major air crashes involved Stapleton as the origin or destination airport, with four evidently occurring at Stapleton.
At Stapleton
On July 11, 1961, United Airlines Flight 859 , a DC-8-12 tail number N8040U, was destroyed after landing. Asymmetric thrust on engines 1 & 2 (left wing) forced a loss of control on the runway. The aircraft struck a maintenance vehicle, killing the driver. In the ensuing disaster, 17 of the DC-8′s 122 occupants died.
On August 7, 1975, Continental Airlines Flight 426 crashed due to windshear after taking off and climbing to 100 feet (30 m) on runway 35L. Nobody was killed in the accident.
On November 16, 1976, a Texas International DC-9-10 aircraft stalled after takeoff at Stapleton and crashed. The 81 passengers and 5 crewmembers suffered a total of 14 injured, but there were no deaths.
On November 15, 1987, Continental Airlines Flight 1713 , a DC-9-14 jetliner bound for Boise, Idaho , crashed on takeoff at Stapleton during a snowstorm. The probable cause of the crash was the failure of the flight crew to have the aircraft de-iced prior to take-off and the over-rotation of the aircraft on take-off. Twenty-eight of the plane’s 82 occupants were killed.
References
^ http://www.departedflights.com , Feb. 15, 1985 Aspen Airways route map; Jan. 16, 1995 Frontier Airlines route map; Dec. 13, 1985 Rocky Mountain Airways route map