|Portland Aerial Tram|
|Operated by||Oregon Health & Science University|
|Type||bi-cable aerial tramway|
|Duration of one-way trip||3 minutes|
|Maximum speed||22 mph (35 km/h)|
|Number of cars||2|
|Passenger capacity||78 per car|
|Daily round trips (passengers)||3,700 (one-way-trips)|
|Began service||December 2006|
|Tramway manufacturer||Doppelmayr CTEC|
|Official website||Portland Aerial Tram|
The Portland Aerial Tram is an aerial tramway in Portland, Oregon carrying commuters between the city's South Waterfront district and the main Oregon Health & Science University (OHSU) campus, located in the Marquam Hill neighborhood. It is the second commuter aerial tramway in the United States (after New York City's Roosevelt Island Tramway). The tram travels a horizontal distance of 3,300 feet (5/8 mi, 1 km) and a vertical distance of 500 feet (150 m) in a ride that lasts three minutes.
The tram was jointly funded by OHSU, the City of Portland, and by South Waterfront property owners, with the bulk of the funding coming from OHSU. It is owned by the city and operated by OHSU. While the majority of passengers are affiliated with OHSU, it is open to the public and operated as part of Portland's public transportation network that includes the Portland Streetcar, MAX Light Rail, and Tri-Met buses. After opening in December 2006, the tram carried its one millionth passenger on October 17, 2007.
The tram cost $57 million to build—a nearly fourfold increase over initial cost estimates, which was one of several sources of controversy concerning the project. A round-trip tram ticket costs $4; the tram is free for OHSU employees, patients, students, and visitors.
The tram consists of two stations and a single intermediate tower. Two tram cars operate on parallel track ropes and are pulled in unison by a haul rope which is driven by an engine at the lower terminal; when one car is at the upper terminal, the other is at the lower terminal, and vice versa. The lower station is located beside an OHSU facility in the South Waterfront neighborhood, adjacent to a stop on the Portland Streetcar line, which connects the South Waterfront neighborhood with downtown Portland. The upper station is located adjacent to OHSU Hospital, on the university's Marquam Hill campus. The two stations are exactly east and west of each other separated by a horizontal distance of 3,300 feet (5/8 mi, 1 km) and a vertical distance of 500 feet (150 m). The maximum vertical clearance between the tram and the ground is 175 feet (53.4 m)
The tram route crosses over Interstate 5 as well as major thoroughfares such as Barbur Boulevard, Oregon Route 10 (Naito Parkway), and Oregon Route 43 (Macadam Avenue). The intermediate tower is located east of Interstate 5 close to the South Waterfront station. As a result of this configuration, much of the journey is significantly elevated above the ground, making the tram easily visible for some distance, and providing tram riders with good views of the eastern metropolitan area and the Cascade Mountains of Oregon and Washington. The alternative to riding the tram is via public roadways which require a 1.9 mile (3.1 km) route with numerous stoplights and intersections. This route includes a short stretch of busy U.S. Route 26, as well as twisty Sam Jackson Park Road which ascends the side of the Tualatin Mountains to the hospital campus.
The lower (South Waterfront) station houses the tram's engines in a reinforced concrete basement and also has ticketing facilities and the control room.
The upper station is a freestanding steel and concrete tower 140 feet above grade and houses the tram's counterweight. It is structurally separate from nearby OHSU Hospital and connects to the hospital's ninth floor via a skybridge. Structural separation between the tram and the hospital is necessary to avoid vibrations from tram machinery interfering with delicate microsurgery performed in the hospital.
The 197 foot (60 m) intermediate tower allows the tram to gain elevation quickly once leaving the lower station to provide adequate clearance over Interstate 5. The tower is 22 feet wide and 20 feet long at its base (6.7 m by 6 m), 8 feet by 8 feet (2.4 m by 2.4 m) at its narrowest point—nearly two-thirds up the tower—and 32 feet by 8 feet (9,8 m by 2.4m) at the top. It rests on a pier cap 5 feet (1.5 m) thick supported by 35 piers. The tower was fabricated in nearby Vancouver, Washington and barged in three pieces up the Willamette River.
Nearly 1,250 tons of steel and 450 tons of concrete are in the two platforms and the intermediate tower; the lateral loads on the upper platform range from 500,000 to 800,000 pounds (2.2 million to 3.6 million newtons) of force.
Each tram car travels on a pair of 2 inch (49 mm) steel track ropes, totaling four cables. The track ropes combined are tensioned at over one million pounds (4.4 million newtons). A fifth cable—the haul rope—is a continuous loop which winds around the drive bullwheel at the lower station, connects to one car, winds through a counterweighted bullwheel at the upper station, then to the other car, before joining itself. The haul rope length is over 7000 feet (2100 m).
The tram cars each weigh approximately 12 tons, with cabin dimensions of 25 feet by 11 feet (7.5 m by 3.3 m). Each car has a capacity of over 13 tons and there is sufficient room in the cabin for 78 passengers and one operator. The tram cars were built by Gangloff Switzerland in Rotterdam, The Netherlands, and were shaped and painted to look like the architectural firm's vision of "bubbles floating through the sky". The surface of the cabins reflect and refract light, minimizing their visual impact to the neighborhood underneath. The two cars are named Jean and Walt, after Jean Richardson, the first female engineering graduate from Oregon State University, and Walt Reynolds, the first African-American to graduate from OHSU, then known as the University of Oregon Medical School.
The tram is propelled by three independent drive systems. The primary drive is a 450 kilowatt (600 hp) variable-frequency electric motor. Two hydrostatic diesel engines are also part of the design: one is a standby drive, permitting operation during a power outage; the other is an emergency evacuation drive.. A 40-ton counterweight offsets the weight of the cars. The tram is capable of operating at speeds up to 22 miles per hour (35 km per hour).
In addition to the redundant drive system, the tram has numerous other design features intended to ensure the safety of passengers and persons on the ground under its route. Communications systems permit the tram car operators to communicate to the control room. Automatic supervisory and control systems monitor the condition of the ropes and the drive systems. The tram was designed to safely operate in the earthquake-prone Pacific Northwest, with a structural design exceeding U.S earthquake standards, and operate in sustained winds of up to 50 mph (80 km/h).
Transportation officials originally estimated the tram would carry over 1,500 people a day, a figure that was expected to rise to 5,500 by 2030. Those initial estimates proved to be pessimistic: the tram actually attracted one million riders in its first 10½ months of operation, an average of 3,700 riders per day.
In late 2001, OHSU purchased property in the South Waterfront (then known as North Macadam) area, with plans to expand there. After studying several ways, including shuttle buses, gondola lifts, tunnels, and even funiculars, to connect OHSU's primary campus on Marquam Hill with this area of planned expansion, the university sought city support of an aerial tram.
The design competition started out by identifying four firms which would participate in the contest. The competition officially began in January 2003, with firms from New York City, Amsterdam, and Los Angeles/Zurich as finalists. The winner, Los Angeles/Zurich-based Angélil / Graham / Pfenninger / Scholl, was announced on March 26, 2003. In November, PATI chose Doppelmayr CTEC to design, fabricate and install the tram. The first public review of the project's status was November 2003.
On October 29, 2006, the tram's two cars arrived from Switzerland after a week-long delay. An inaugural run of the tram was conducted on November 9, 2006. Four tram construction workers were the first to test ride the tram while harnessed to the roof and suspending arm. Testing on the tram continued through November. The tram opened to OHSU employees on December 1, 2006. The tram opened to the public on January 27, 2007.
In April 2004, the second public review was held to present project recommendations prior to a May review by the city council. The costs by then were estimated to be $28.5 million, including soft costs. The City's share at that time was $3.5 million. In April 2005, the price was readjusted again to $40 million with a construction delay of six months. Higher steel costs, weakening US dollars, and engineering modifications were blamed. By October, The Oregonian reported that steel costs had led to bids pushing the project's price (with contingency funds) to $45 million. The increased cost was expected to be met through South Waterfront urban renewal contributions which would have otherwise been spent on streets and parks.
In January 2006, Portland city commissioner Sam Adams, who inherited the city's oversight of the project, undertook several actions in response to spiraling costs. The executive director of PATI was ousted, and a month-long independent audit and risk assessment was undertaken; its results were published February 1, 2006. By this point, construction was over one third completed.
The audit revealed that OHSU managers knew as early as 2003 that the tram would cost well in excess of the original $15.5 million figure, partially due to a change in location of the upper terminal to accommodate planned hospital construction, but had withheld that information from city leaders. This resulted in harsh public criticism of OHSU management, with city commissioner Randy Leonard accusing the university leadership of an "outrageous shell game...all at the expense of taxpayers". As a result, the City of Portland threatened to withdraw funding from the tram mid-construction, which would probably have scuttled the project. OHSU protested vigorously, threatening a lawsuit should the tram be canceled, and claimed the city was responsible for making up any budget shortfall. Negotiations between the city, OHSU, and the contractors ensued, with a revised funding plan and budget being agreed upon in April 2006, by a 3-2 vote of the city council. This revised funding plan required concessions from all parties involved, and called for a final budget of $57 million, with contributions from the City to be $8.5 million, or nearly 15% of the overall budget. This final budget was met.
Many residents of the Corbett-Terwilliger and Lair Hill neighborhoods, over which the tram passes, were concerned the cars would be an invasion of privacy and lead to lower property values. Initially, residents were promised that overhead power lines would be buried as part of the project, but as cost overruns mounted, this plan was scrapped. Neighborhood opponents of the tram have cited other reasons for opposing the tram's construction, including the fact that the North Corbett neighborhood is a National Historic District. Some residents filed a lawsuit against the city and OHSU, claiming that they own the "airspace" above their properties. The city later offered to purchase homes directly under the tram route at fair market value.
Even after its completion, the tram remains unpopular with some living underneath its route. In April 2007, homeowner Justin Auld, living under the tram route, placed a sign on his roof stating "FUCK THE TRAM" in large block letters. The sign is not visible from the street, only from the air. Officials had looked into whether or not the sign violated any laws. The publicity surrounding the sign prompted city officials to quietly negotiate with the home owner, and the sign has since been moved and the expletive covered.
The tram's supporters, however, have claimed that many of the increases are justified, or due to circumstances beyond the developers' control. The auditor's report, commissioned in 2006, complimented the tram as "a dramatic, one-of-a-kind facility that will become a Portland landmark," and noted that the design was difficult to construct, requiring the tall, thin, complex tower and the tall, heavily loaded upper terminal to be built within very tight tolerances.
Special risks cited include:
In addition, it has been claimed that the re-planning delayed the tram's completion. One of the designers of the tram noted that "if we added up all the times we went back to try to save money, we probably lost a year. Maybe we saved $2 million, but what did we lose? If we had an extra year, that would have meant a lot.
Some critics cite the tram as an example of corporate welfare for OHSU with limited public benefit. A 2001 study done by OHSU prior to the tram being designed projected that the tram would have 4,700 riders per day by 2030, with less than one fifth (850) of those being non-OHSU users. While the lower station has easy public access, access to the upper station requires navigating through the OHSU hospital. The Cascade Policy Institute, a local libertarian research group, criticized the project for being "railroaded through the political process by small groups of private interests", and expressed doubt that tram construction would lead to new jobs.
Others argue that while the issues of increasing public costs are real, the importance of continued growth of OHSU for the city's economy must be factored in as well. Not only is it the largest employer in the city, but OHSU is an important and effective vehicle to attract both federal funding, totaling more than 168 million dollars for 2005, and a highly skilled workforce to the area. The growth in the current campus on the Marquam Hill is limited by access roads and parking, an expansion of which would likely cause more dramatic harm to the surrounding communities.
According to city commissioner Adams, a cheaper alternative which would have changed the tower's designs to a lattice style used in electrical transmission towers, was not considered because the result would look like an "ugly ski lift at a bad ski resort" and leave the city with what Adams called an "ugly postcard" that could last 100 years. Critics of the tram have also expressed concern over the tram spoiling views from the city's West Hills, particularly from Gibbs Street, under the tram.