The Trans-Alaska Pipeline System (TAPS) is an oil transportation system spanning Alaska, including the trans-Alaska crude-oil pipeline, 12 pump stations, several hundred miles of feeder pipelines, and the Valdez Marine Terminal. TAPS is one of the world's largest pipeline systems. The core pipeline itself, which is commonly called the Alaska pipeline, trans-Alaska pipeline, or Alyeska pipeline, (or the pipeline as referred to by Alaskan residents), is an long, diameter pipeline that conveys oil from Prudhoe Bay, on Alaska's North Slope, south to Valdez, on the shores of Prince William Sound in southcentral Alaska. The crude oil pipeline is privately owned by the Alyeska Pipeline Service Company.

Oil was first discovered in Prudhoe Bay in 1968 and the 800 miles of 48" steel pipe was ordered from Japan in 1969 (U.S. steel manufacturers did not have the capacity at that time). However, construction was delayed for nearly 5 years due to legal and environmental issues. The eight oil companies that owned the rights to the oil hired Bechtel for the pipeline design and construction and Fluor for the 12 pump stations and the Valdez Terminal. Preconstruction work during 1973 and 1974 was critical and included the building of camps to house workers, construction of roads and bridges where none existed, and carefully laying out the pipeline right of way to avoid difficult river crossings and animal habitats. Construction of the pipeline system took place between 1975 and 1977. It was important for the United States to have a domestic source of oil to offset the high rise in foreign oil and the Alaska Pipeline fulfilled that obligation.

Building oil pipelines in the 1950s and 60s was not difficult in the contiguous United States. However, in building the Alaska Pipeline, engineers faced a wide range of difficulties, stemming mainly from the extreme cold and the difficult, isolated terrain. The construction of the pipeline was one of the first large-scale projects to deal with problems caused by permafrost, and special construction techniques had to be developed to cope with the frozen ground. The project attracted tens of thousands of workers to Alaska due to high wages, long work hours, and paid-for housing, causing a boomtown atmosphere in Valdez, Fairbanks, and Anchorage.

The first barrel of oil traveled through the pipeline in the summer with full-scale production by the end of the year. Several notable incidents of oil leakage have occurred since, including those caused by sabotage, maintenance failures, and bullet holes. As of 2025, it had shipped over 19 billion barrels of oil. The pipeline has been shown capable of delivering over 2 million barrels of oil per day but currently operates at a fraction of maximum capacity, around 470,000 barrels per day. If flow were to stop or throughput were too little, the line could freeze. The pipeline could be extended and used to transport oil produced from controversial proposed drilling projects in the nearby Arctic National Wildlife Refuge (ANWR).

Origins

Iñupiat people on the North Slope of Alaska had mined oil-saturated peat for possibly thousands of years, using it as fuel for heat and light. Whalers who stayed at Point Barrow saw the substance the Iñupiat called pitch and recognized it as petroleum. Charles Brower, a whaler who settled at Barrow and operated trading posts along the Arctic coast, directed geologist Alfred Hulse Brooks to oil seepages at Cape Simpson and Fish Creek in the far north of Alaska, east of the village of Barrow. Brooks' report confirmed the observations of Thomas Simpson, an officer of the Hudson's Bay Company who first observed the seepages in 1836. Similar seepages were found at the Canning River in 1919 by Ernest de Koven Leffingwell. Following the First World War, as the United States Navy converted its ships from coal to fuel oil, a stable supply of oil became important to the U.S. government. Accordingly, President Warren G. Harding established by executive order a series of Naval Petroleum Reserves (NPR-1 through -4) across the United States. These reserves were areas thought to be rich in oil and set aside for future drilling by the U.S. Navy. Naval Petroleum Reserve No. 4 was sited in Alaska's far north, just south of Barrow, and encompassed .

The first explorations of NPR-4 were undertaken by the U.S. Geological Survey from 1923 to 1925 and focused on mapping, identifying and characterizing coal resources in the western portion of the reserve and petroleum exploration in the eastern and northern portions of the reserve. These surveys were primarily pedestrian in nature; no drilling or remote sensing techniques were available at the time. These surveys named many of the geographic features of the areas explored, including the Philip Smith Mountains and quadrangle.

The petroleum reserve lay dormant until World War II provided an impetus to explore new oil prospects. The first renewed efforts to identify strategic oil assets were a two pronged survey using bush aircraft, local Inupiat guides, and personnel from multiple agencies to locate reported seeps. Ebbley and Joesting reported on these initial forays in 1943. Starting in 1944, the U.S. Navy funded oil exploration near Umiat Mountain, on the Colville River in the foothills of the Brooks Range. Surveyors from the U.S. Geological Survey spread across the petroleum reserve and worked to determine its extent until 1953, when the Navy suspended funding for the project. The USGS found several oil fields, most notably the Alpine and Umiat Oil Field, but none were cost-effective to develop.

Four years after the Navy suspended its survey, Richfield Oil Corporation (later Atlantic Richfield and ARCO) drilled an enormously successful oil well near the Swanson River in southern Alaska, near Kenai. The resulting Swanson River Oil Field was Alaska's first major commercially producing oil field, and it spurred the exploration and development of many others. By 1965, five oil and 11 natural gas fields had been developed. This success and the previous Navy exploration of its petroleum reserve led petroleum engineers to the conclusion that the area of Alaska north of the Brooks Range surely held large amounts of oil and gas. The problems came from the area's remoteness and harsh climate. It was estimated that between and of oil would have to be recovered to make a North Slope oil field commercially viable. On March 12, 1968, an Atlantic Richfield drilling crew hit paydirt. A discovery well began flowing at the rate of of oil per day. General Dynamics proposed a line of tanker submarines for travel beneath the Arctic ice cap, and another group proposed extending the Alaska Railroad to Prudhoe Bay.

To test this, in 1969 Humble Oil and Refining Company sent a specially fitted oil tanker, the , to test the feasibility of transporting oil via ice-breaking tankers to market. The Manhattan was fitted with an ice-breaking bow, powerful engines, and hardened propellers before successfully traveling the Northwest Passage from the Atlantic Ocean to the Beaufort Sea. During the voyage, the ship suffered damage to several of its cargo holds, which flooded with seawater. Wind-blown ice forced the Manhattan to change its intended route from the M'Clure Strait to the smaller Prince of Wales Strait. It was escorted back through the Northwest Passage by a Canadian Coast Guard icebreaker, the CCGS John A. Macdonald. Although the Manhattan transited the Northwest Passage again in the summer of 1970, the concept was considered too risky.

Forming Alyeska

thumb|right|Alaska headquarters of [[BP in Anchorage ]]

In February 1969, before the SS Manhattan had even sailed from its East Coast starting point, the Trans-Alaska Pipeline System (TAPS), an unincorporated joint group created by ARCO, British Petroleum, and Humble Oil in October 1968, asked for permission from the United States Department of the Interior to begin geological and engineering studies of a proposed oil pipeline route from Prudhoe Bay to Valdez, across Alaska. Even before the first feasibility studies began, the oil companies had chosen the approximate route of the pipeline.

Because TAPS hoped to begin laying pipe by September 1969, substantial orders were placed for steel pipeline 48 inches (122 cm) in diameter. No American company manufactured pipe of that specification, so three Japanese companies—Sumitomo Metal Industries, Nippon Steel Corporation and Nippon Kokan Kabushiki Kaisha—received a $100 million contract for more than 800 miles (1280 km) of pipeline. At the same time, TAPS placed a $30 million order for the first of the enormous pumps that would be needed to push the oil through the pipeline.

In June 1969, as the SS Manhattan traveled through the Northwest Passage, TAPS formally applied to the Interior Department for a permit to build an oil pipeline across of public land—from Prudhoe Bay to Valdez. The application was for a 100-foot (30.5 m) wide right of way to build a subterranean 48-inch (122-centimeter) pipeline including 11 pumping stations. Another right of way was requested to build a construction and maintenance highway paralleling the pipeline. A document of just 20 pages contained all of the information TAPS had collected about the route up to that stage in its surveying.

The Interior Department responded by sending personnel to analyze the proposed route and plan. Max Brewer, an arctic expert in charge of the Naval Arctic Research Laboratory at Barrow, concluded that the plan to bury most of the pipeline was completely unfeasible because of the abundance of permafrost along the route. In a report, Brewer said the hot oil conveyed by the pipeline would melt the underlying permafrost, causing the pipeline to fail as its support turned to mud. This report was passed along to the appropriate committees of the U.S. House and Senate, which had to approve the right-of-way proposal because it asked for more land than authorized in the Mineral Leasing Act of 1920 and because it would break a development freeze imposed in 1966 by former Secretary of the Interior Stewart Udall.

Udall imposed the freeze on any projects involving land claimed by Alaska Natives in hopes that an overarching Native claims settlement would result. In the fall of 1969, the Department of the Interior and TAPS set about bypassing the land freeze by obtaining waivers from the various native villages that had claims to a portion of the proposed right of way. By the end of September, all the relevant villages had waived their right-of-way claims, and Secretary of the Interior Wally Hickel asked Congress to lift the land freeze for the entire TAPS project. After several months of questioning by the House and Senate committees with oversight of the project, Hickel was given the authority to lift the land freeze and give the go-ahead to TAPS.

TAPS began issuing letters of intent to contractors for construction of the "haul road", a highway running the length of the pipeline route to be used for construction. Heavy equipment was prepared, and crews prepared to go to work after Hickel gave permission and the snow melted. Before Hickel could act, however, several Alaska Native and conservation groups asked a judge in Washington, D.C., to issue an injunction against the project. Several of the native villages that had waived claims on the right of way reneged because TAPS had not chosen any Native contractors for the project and the contractors chosen were not likely to hire Native workers.

On April 1, 1970, Judge George Luzerne Hart, Jr., of the United States District Court for the District of Columbia, ordered the Interior Department to not issue a construction permit for a section of the project that crossed one of the claims. Less than two weeks later, Hart heard arguments from conservation groups that the TAPS project violated the Mineral Leasing Act and the National Environmental Policy Act, which had gone into effect at the start of the year. Hart issued an injunction against the project, preventing the Interior Department from issuing a construction permit and halting the project in its tracks.

After the Department of the Interior was stopped from issuing a construction permit, the unincorporated TAPS consortium was reorganized into the new incorporated Alyeska Pipeline Service Company. Former Humble Oil manager Edward L. Patton was put in charge of the new company and began to lobby strongly in favor of an Alaska Native claims settlement to resolve the disputes over the pipeline right of way.

Opposition

Opposition to construction of the pipeline primarily came from two sources: Alaska Native groups and conservationists. Alaska Natives were upset that the pipeline would cross the land traditionally claimed by a variety of native groups, but no economic benefits would accrue to them directly. Conservationists were angry at what they saw as an incursion into America's last wilderness.

Conservation objections

right|thumb|250px|A [[caribou walks next to a section of the pipeline north of the Brooks Range. Opponents of the pipeline asserted the presence of the pipeline would interfere with the caribou.]]

Although conservation groups and environmental organizations had voiced opposition to the pipeline project before 1970, the introduction of the National Environmental Policy Act allowed them legal grounds to halt the project. Arctic engineers had raised concerns about the way plans for a subterranean pipeline showed ignorance of Arctic engineering and permafrost in particular. A clause in NEPA requiring a study of alternatives and another clause requiring an environmental impact statement turned those concerns into tools used by the Wilderness Society, Friends of the Earth, and the Environmental Defense Fund in their Spring 1970 lawsuit to stop the project.

The injunction against the project forced Alyeska to do further research throughout the summer of 1970. The collected material was turned over to the Interior Department in October 1970, and a draft environmental impact statement was published in January 1971. The 294-page statement drew massive criticism, generating more than 12,000 pages of testimony and evidence in Congressional debates by the end of March. Criticisms of the project included its effect on the Alaska tundra, possible pollution, harm to animals, geographic features, and the lack of much engineering information from Alyeska. One element of opposition the report quelled was the discussion of alternatives. All the proposed alternatives—extension of the Alaska Railroad, an alternative route through Canada, establishing a port at Prudhoe Bay, and more—were deemed to pose more environmental risks than construction of a pipeline directly across Alaska. This argument relied upon the slow growth of plants and animals in far northern Alaska due to the harsh conditions and short growing season. In testimony, an environmentalist argued that arctic trees, though only a few feet tall, had been seedlings "when George Washington was inaugurated".

The portion of the environmental debate with the biggest symbolic impact took place when discussing the pipeline's impact on caribou herds. Environmentalists proposed that the pipeline would have an effect on caribou similar to the effect of the U.S. transcontinental railroad on the American bison population of North America. The use of caribou as an example of the pipeline's environmental effects reached a peak in the spring of 1971, when the draft environmental statement was being debated. Tlingit natives who lived in the area protested that the land was theirs and had been unfairly taken. In 1935, Congress passed a law allowing the Tlingits to sue for recompense, and the resulting case dragged on until 1968, when a $7.5 million settlement was reached. Following the Native lawsuit to halt work on the Trans-Alaska Pipeline, this precedent was frequently mentioned in debate, causing pressure to resolve the situation more quickly than the 33 years it had taken for the Tlingits to be satisfied. Between 1968 and 1971, a succession of bills were introduced into the U.S. Congress to compensate statewide Native claims. The earliest bill offered $7 million, but this was flatly rejected.

The Alaska Federation of Natives, which had been created in 1966, hired former United States Supreme Court justice Arthur Goldberg, who suggested that a settlement should include of land and a payment of $500 million. The money and land were split up among village and regional corporations, which then distributed shares of stock to Natives in the region or village. The shares paid dividends based on both the settlement and corporation profits. To pipeline developers, the most important aspect of ANCSA was the clause dictating that no Native allotments could be selected in the path of the pipeline.

Another objection of the natives was the potential for the pipeline to disrupt a traditional way of life. Many natives were worried that the disruption caused by the pipeline would scare away the whales and caribou that are relied upon for food.

thumb|Most road crossings are simply buried deep, but this crossing on the [[Richardson Highway is close to the surface and employs thermosyphons, special heat pipes that conduct heat from the oil to the fins at the top of the pipes in order to avoid thawing the permafrost]]

thumb|Alyeska, buried pipeline with heat pipes, summer 1987

thumb|right|TAPS and the Dalton Highway crossing the Kanuti National Wildlife Refuge

In both the courts and Congress, Alyeska and the oil companies fought for the pipeline's construction amidst opposition concerning the pipeline's EIS (environmental impact statement). The arguments continued through 1971. Objections about the caribou herds were countered by observations of Davidson Ditch, a water pipeline with the same diameter of the Trans-Alaska Pipeline, which caribou were able to jump over. To those who argued that the pipeline would irrevocably alter Alaska wilderness, proponents pointed to the overgrown remnants of the Fairbanks Gold Rush, most of which had been erased 70 years later. Some pipeline opponents were satisfied by Alyeska's preliminary design, which incorporated underground and raised crossings for caribou and other big game, gravel and styrofoam insulation to prevent permafrost melting, automatic leak detection and shutoff, and other techniques. Other opponents, including fishermen who feared tanker leaks south of Valdez, maintained their disagreement with the plan.

All the arguments both for and against the pipeline were incorporated into the 3,500-page, 9-volume final environmental impact statement, which was released on March 20, 1972. U.S. Secretary of the Interior Rogers Morton allowed 45 days of comment after the release, and conservationists created a 1,300-page document opposing the impact statement. This document failed to sway Judge Hart, who lifted the injunction on the project on August 15, 1972.

The environmental groups that had filed the injunction appealed the decision, and on October 6, 1972, the U.S. District Court of Appeals in Washington, D.C., partially reversed Hart's decision. The appeals court said that although the impact statement followed the guidelines set by the National Environmental Policy Act, it did not follow the Minerals Leasing Act, which allowed for a smaller pipeline right of way than was required for the Trans-Alaska Pipeline.

Congressional issues

With the appeals court having decided that the Minerals Leasing Act did not cover the pipeline's requirements, Alyeska and the oil companies began lobbying Congress to either amend the act or create a new law that would permit a larger right-of-way. The Senate Interior Committee began the first hearings on a series of bills to that effect on March 9, 1973. Environmental opposition switched from contesting the pipeline on NEPA grounds to fighting an amendment to the leasing act or a new bill. By the spring and summer of 1973, these opposition groups attempted to persuade Congress to endorse a Trans-Canada oil pipeline or a railroad. They believed the "leave it in the ground" argument was doomed to fail, and the best way to oppose the pipeline would be to propose an ineffective alternative which could be easily defeated. The problem with this approach was that any such alternative would cover more ground and be more damaging environmentally than the Trans-Alaska Pipeline.

Hearings in both the U.S. Senate and the House continued through the summer of 1973 on both new bills and amendments to the Mineral Leasing Act. On July 13, an amendment calling for more study of the project—the Mondale-Bayh Amendment—was defeated. This was followed by another victory for pipeline proponents when an amendment by Alaska Sen. Mike Gravel was passed by the Senate. The amendment declared that the pipeline project fulfilled all aspects of NEPA and modified the Mineral Leasing Act to allow the larger right-of-way for the Alaska pipeline. Upon reconsideration, the vote was tied at 49–49 and required the vote of vice president Spiro Agnew, who supported the amendment; a similar amendment was passed in the House on August 2.

Oil crisis and authorization act

On October 17, 1973, the Organization of Arab Petroleum Exporting Countries announced an oil embargo against the United States in retaliation for its support of Israel during the Yom Kippur War. Because the United States imported approximately 35 percent of its oil from foreign sources, the embargo had a major effect. The price of gasoline shot upward, gasoline shortages were common, and rationing was considered. Most Americans began demanding a solution to the problem, and President Richard Nixon began lobbying for the Trans-Alaska Pipeline as at least a part of the answer.

Nixon supported the pipeline project even before the oil crisis. On September 10, 1973, he released a message stating that the pipeline was his priority for the remainder of the Congressional session that year. On November 8, after the embargo had been in place for three weeks, he reaffirmed that statement. Members of Congress, under pressure from their constituents, created the Trans-Alaska Pipeline Authorization Act, which removed all legal barriers from construction of the pipeline, provided financial incentives, and granted a right-of-way for its construction. The act was drafted, rushed through committee, and approved by the House on November 12, 1973, by a vote of 361–14–60. The next day, the Senate passed it, 80–5–15. Nixon signed it into law on November 16, and a federal right-of-way for the pipeline and transportation highway was granted on January 3, 1974. The deal was signed by the oil companies on January 23, allowing work to start.

Construction

thumb|right|The pipeline is on slider supports where it crosses the [[Denali Fault.]]

thumb|Alyeska pipeline on slide shoes, allowing movement in case of earthquakes

Although the legal right-of-way was cleared by January 1974, cold weather, the need to hire workers, and construction of the Dalton Highway meant work on the pipeline itself did not begin until March. Between 1974 and July 28, 1977, when the first barrel of oil reached Valdez, tens of thousands of people worked on the pipeline. Thousands of workers came to Alaska, attracted by the prospect of high-paying jobs at a time when most of the rest of the United States was undergoing a recession.

Construction workers endured long hours, cold temperatures, and brutal conditions. Difficult terrain, particularly in Atigun Pass, Keystone Canyon, and near the Sagavanirktok River forced workers to come up with solutions for unforeseen problems. Faulty welds and accusations of poor quality control caused a Congressional investigation that ultimately revealed little. More than $8 billion was spent to build the of pipeline, the Valdez Marine Terminal, and 12 pump stations. The construction effort also had a human toll. Thirty-two Alyeska and contract employees died from causes directly related to construction. That figure does not include common carrier casualties.

Impact

Boomtowns

thumb|upright|Water overflowed the banks of the [[Chena River in August 1967, flooding Fairbanks and Fort Wainwright.]]

Construction of the pipeline caused a massive economic boom in towns up and down the pipeline route. Prior to construction, most residents in towns like Fairbanks—still recovering from the devastating 1967 Fairbanks Flood—strongly supported the pipeline. By 1976, after the town's residents had endured a spike in crime, overstressed public infrastructure, and an influx of people unfamiliar with Alaska customs, 56 percent said the pipeline had changed Fairbanks for the worse. The boom was even greater in Valdez, where the population jumped from 1,350 in 1974 to 6,512 by the summer of 1975 and 8,253 in 1976.

This increase in population caused many adverse effects. Home prices skyrocketed—a home that sold for $40,000 in 1974 was purchased for $80,000 in 1975. In Valdez, lots of land that sold for $400 in the late 1960s went for $4,000 in 1973, $8,000 in 1974, and $10,000 in 1975. Home and apartment rentals were correspondingly squeezed upward by the rising prices and the demand from pipeline workers. Two-room log cabins with no plumbing rented for $500 per month. One two-bedroom home in Fairbanks housed 45 pipeline workers who shared beds on a rotating schedule for $40 per week. In Valdez, an apartment that rented for $286 per month in December 1974 cost $520 per month in March 1975 and $1,600 per month—plus two mandatory roommates—in April 1975. Hotel rooms were sold out as far away as Glenallen, north of Valdez.

The skyrocketing prices were driven by the high salaries paid to pipeline workers, who were eager to spend their money. The high salaries caused a corresponding demand for higher wages among non-pipeline workers in Alaska. Non-pipeline businesses often could not keep up with the demand for higher wages, and job turnover was high. Yellow cabs in Fairbanks had a turnover rate of 800 percent; a nearby restaurant had a turnover rate of more than 1,000 percent. Many positions were filled by high school students promoted above their experience level. To meet the demand, a Fairbanks high school ran in two shifts: one in the morning and the other in the afternoon in order to teach students who also worked eight hours per day. More wages and more people meant higher demand for goods and services. Waiting in line became a fact of life in Fairbanks, and the Fairbanks McDonald's became No. 2 in the world for sales—behind only the recently opened Stockholm store. Alyeska and its contractors bought in bulk from local stores, causing shortages of everything from cars to tractor parts, water softener salt, batteries and ladders. Fairbanks' Second Avenue became a notorious hangout for prostitutes, and dozens of bars operated throughout town. In 1975, the Fairbanks Police Department estimated between 40 and 175 prostitutes were working in the city of 15,000 people. Trouble was incited sometimes by prostitutes' pimps, who engaged in turf fights. In 1976, police responded to a shootout between warring pimps who wielded automatic firearms. By and large, however, the biggest police issue was the number of drunken brawls and fighting. The Los Angeles Times reported in 1975 that as many as 200 of Alyeska's 1,200 yellow-painted trucks were missing from Alaska and "scattered from Miami to Mexico City". Alyeska denied the problem and said only 20–30 trucks were missing. The theft problem was typified by pipeliners' practice of mailing empty boxes to pipeline camps. The boxes then would be filled with items and shipped out. After Alyeska ruled that all packages had to be sealed in the presence of a security guard, the number of packages being sent from camps dropped by 75 percent.

Economy of Alaska