SW Transit Corridor plan:
Underground options questioned, criticized
As Hillsdale finds out more about options for high-capacity mass transit in the Southwest Transit Corridor, more folks are looking skeptically at the possible tunnel routes through or beneath the Hillsdale Town Center.
And differences are surfacing, which is hardly surprising given the complexities, costs and uncertainties involved.
Early opinion last year at the Hillsdale Neighborhood Association and the Hlllsdale Business & Professional Association favored a Light Rail tunnel under the Town Center. As it turns out the route would have a 145-foot-deep-underground stop in the Town Center. The 2.35-mile-long tunnel, currently estimated to cost $1.3 billion, would go directly to OHSU and then Downtown.
During and after a well-attended presentation at the February 4 Hillsdale Neighborhood Association meeting, several residential property owners aired serious concerns about the long tunnel and about an alternative much shorter and shallower "cut-and-cover" tunnel route through the Town Center.
The neighborhood association will resume the discussion at its Wednesday, March 4, meeting (7 p.m., St. Barnabas Church, 2201 SW Vermont St.)
Association president Mikal Apenes said wide discussion is needed. "It was clear from the February meeting that we, as a community are a long way from forming a consensus on what would be the best route for Hillsdale. Several of the attendees are just learning of this project. Newer residents, in fact, all residents of Hillsdale, should have the opportunity to learn about the project and voice their concerns and opinions. Which route Hillsdale supports should not be left to the two dozen or so regular attendees of our meetings."
On Monday, March 9, the Southwest Corridor Plan Steering Committee, consisting of top elected and transit agency officials, will meet at the Tigard Public Library to hear issues that have been raised here and elsewhere in Southwest Portland. For directions and more about the meeting go
HERE.
On July 9th, the powerful Steering Committee will be asked to act on a staff recommendation as to whether to continue including the Marquam Hill-Hillsdale bored tunnel, or the shallow, short-cut-and-cover" tunnel. (The short tunnel is called "cut and cover" because it involves simply digging a deep trench for transit and then covering it so that vehicular traffic on the street can travel above.)
The tunnel alignments would the use Light Rail rather than large, articulated buses featuring dedicated lanes.
The other option is to avoid the Town Center entirely and simply build Light Rail or "Bus Rapid Transit" down Barbur Boulevard. Marquam Hill could be served indirectly via elevators either from Barbur or an optional Naito Parkway extension route, said Noelle Dobson, a Metro public affairs specialist.
Another option is a short tunnel to Marquam Hill coming off Barbur in the Lair Hill area. (See map, below right)
Tunnel-versus-surface decision
The July decision "is more a question of tunnel versus surface access," Dobson said.
She added that the Steering committee always has the discretion to say it needs more information or is not ready to make a decision.
The construction of the shallow "cut and cover" tunnel under Capitol Highway in the Town Center would likely have a short-term, but negative impact on small businesses. Yet another potential route for the shallow tunnel would be under the Rieke soccer field with a stop at Sunset and Capitol Highway.
Some 50 neighbors showed up at the meeting on Feb. 4 to hear Tri-Met and Metro staff explain the numerous options under consideration. The entire Southwest Corridor project would stretch from downtown to Tigard and Tualatin. Those two communities have also raised objections to the entire project through ballot measures.
Whether it uses big articulated buses or Light Rail, the project, which would be completed in 20 to 25 years, is intended to provide alternative transit to the use of I-5, already approaching capacity during rush hours.
Among those objecting to the tunnel routes through the Hillsdale Town Center was Wilson Park resident Carol Brimhall. Following the Feb. 4 meeting, she listed her concerns to Metro staff in a letter. The neighborhood is already jammed with park-and-ride cars, hindering patronage at local businesses, she wrote adding that an additional transit station will worsen the problem.

She noted that Hillsdale is already served by seven bus lines. Residents wanting a faster commute could connect with a Barbur-only HCT line.
Cost is another issue. What will the tax burden be? she asked. Who will pay for the tunnel? Answers to the questions aren't yet available. Brimhall suggested that if OHSU wants the tunnel, it should pay for it.
Officials overseeing the planning hope that the Federal government will pick up half the tab of the entire project. Excluding the tunnel, the project is estimated to cost $1.8 billion.
Brimhall and others raised seismic concerns as Hillsdale straddles a fault and has numerous underground streams. The entire West Hills are in a "potential landslide zone."
Brimhall emphasized that she supports high capacity transit and that a Barbur route offers an "excellent option."
Bad vibrations Some homeowners in Wilson Park also wonder what tunnel vibrations, during and after construction, would mean to their neighborhood. Tunnel construction also requires underground blasting.
Another critic is Hillsdale orthodontist Richard Garfinkle, who has been active in the community's civic affairs for decades and prior to the Feb. 4 meeting was generally supportive of the tunnel option. Garfinkle and his son, Judah, also an orthodontist, recently moved their office from Sunset Boulevard in the Town Center to a location on Bertha Boulevard. The office is next to at least one of the route options under consideration for HCT.
Garfinkle said in an e-mail to the Hillsdale News that he has been reconsidering pros and cons since the meeting. "I was surprised by my conclusions..." he said.
He said he likes the idea of government building needed infrastructure and the tunnel idea looks "sexy." But now he wonders what an alignment through Hillsdale's Town Center would do for business and the community.
He noted that Metro experts at the meeting anticipate very little population growth in Hillsdale and neighboring Bridlemile. He echoed Brimhall in noting how well Hillsdale is served by transit now.
He wrote: "We don't need a tunnel to get us one stop north and up or down the hill to OHSU from here. Nor to downtown...." And, he added, Hillsdale doesn't commute "heavily to the south."
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A relatively short, shallow cut-and-cover tunnel is built in four stages. |
He offered that "Hillsdale is not now nor will it ever be a destination with a capital 'D'. The SW Transit through the Town Center will stimulate very few 'get offs' INTO Hillsdale."
Instead bus service through Hillsdale needs to be "reconceptualized." He suggests "a local web-like approach" with possible "on-call service." "We need to be able to get down and up the West Hills and connect to the SW Transit Corridor."
Some have suggested that transit technology is changing so fast that any decision made today will be obsolete by the time construction is complete.
But others see potential in Hillsdale becoming a center for medical offices, a kind of OHSU west, if the tunnel is built connecting the community directly to Marquam Hill.
Waiting for engineering details Dave Aulwes, a Tri-Met senior transit corridor designer, tried to answer some of the questions being raised but noted that details will have to wait until mid-April when a report from geo-technical engineers is expected.
As presently designed, a Hillsdale Town Center stop would be 145 feet beneath the surface requiring passengers to use an elevator. For comparison's sake. the current Light Rail tunnel, the "Robertson Tunnel" at the Zoo station in Washington Park, is 260 feet deep.
He said that the portion of the tunnel under Wilson Park would be between 155 feet and 100 feet underground. Construction time for the entire tunnel is now "conservatively" estimated to be five years. That's how long it took to build the the 2.93-mile-long Robertson Tunnel in the mid-'90s.
The actual start date for construction is estimated to be somewhere between 10 and 20 years from now, said Metro's Dobson.
Alwes said that those who worked on the Robertson tunnel recall that "tunneling activity was definitely perceptible from above" but "there were no instances where building or other properties were determined to be damaged as a result of the tunneling operation."