Undercrossing opens to link north and south Issaquah

December 21, 2010

Crews completed the Interstate 90 Undercrossing last week and opened the north-south connector to traffic Dec. 16. By Greg Farrar

The link between north and south Issaquah opened to traffic Dec. 16, after years of planning and months of construction.

The long-planned Interstate 90 Undercrossing — Fourth Avenue Northwest — runs from a traffic signal at the post office along Northwest Gilman Boulevard, connects into the rail corridor behind Gilman Station, forms a T-shaped intersection at Southeast 62nd Street, continues along 221st Place Southeast and then terminates at Southeast 56th Street.

Crews experienced a last-minute delay last month, after the installation of bridge safety railings lasted longer than expected. The city planned to open the connector around Dec. 6, but the slowdown prompted planners to update the schedule.

The link supplements traffic-clogged Front Street North and state Route 900, the other connectors between north and south Issaquah. Both older crossings also provide access to the interstate, but the combination of local traffic and vehicles from the on- and off-ramps add to the gridlock.

Because part of the undercrossing is located within the King County East Lake Sammamish Trail Corridor, the link also serves as a multimodal facility.

Pickering Trail also crosses Fourth Avenue Northwest at a signalized crossing, and then connects to the East Lake Sammamish Trail.

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Undercrossing construction ends soon

October 26, 2010

Construction continues on the Interstate 90 Undercrossing, or Fourth Avenue Northwest, a north-south link beneath the interstate.

The contractor has paved several phases of the project. Though the new signal at Northwest Gilman Boulevard and Fourth Avenue Northwest is operational, the entrance to the Issaquah Post Office off of the undercrossing is not yet available for use, in order to keep the job site safe. In the meantime, drivers must continue to use the driveway just west of the new signal.

The long-planned undercrossing should be completed by next month. The project is designed to reduce traffic on Gilman Boulevard and Front Street North.

Undercrossing construction alters access to post office

August 31, 2010

The entry to the Issaquah Post Office from the future Interstate 90 Undercrossing has closed for five weeks as crews build the north-south connector.

The post office can instead be accessed from a new driveway connected to Northwest Gilman Boulevard.

During the closure, crews plan to widen the road and add utilities. Work on lighting and traffic signals should continue as well. Poles for traffic signals could be installed in early September.

On the opposite side of the interstate, Southeast 62nd Street from East Lake Sammamish Parkway to the 600 block of 221st Place Southeast remains closed as crews construct a bridge. Plans call for utilities to be installed next week.

The completed roadway will run from the traffic signal at the post office along Northwest Gilman Boulevard, form a T-shaped intersection at Southeast 62nd Street, continue along 221st Place Southeast and then end at Southeast 56th Street. Crews should complete the connector by early fall.

Undercrossing construction alters access to post office

August 27, 2010

NEW — 8 a.m. Aug. 27, 2010

The entry to the Issaquah Post Office from the future Interstate 90 Undercrossing has closed for five weeks as crews build the north-south connector.

The post office can instead be accessed from a new driveway connected to Northwest Gilman Boulevard.

During the closure, crews plan to widen the road and add utilities. Work on lighting and traffic signals should continue as well. Poles for traffic signals could be installed as early as next week.

On the opposite side of the interstate, Southeast 62nd Street from East Lake Sammamish Parkway to the 600 block of 221st Place Southeast remains closed as crews construct a bridge. Plans call for utilities to be installed next week.

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Plan for roadwork at several spots

August 10, 2010

Sunset Way widening project removes street parking

Crews have started removing street parking along East Sunset Way as part of a project to relieve traffic congestion.

Issaquah city planners required the Issaquah School District to complete the project as part of the $84 million Issaquah High School renovation. The school sits along Second Avenue Southeast.

Work at Sunset Way and Second Avenue started Aug. 9. The district plans to avoid closures during peak commutes. Expect traffic delays at other times.

Plans call for another lane to be added on westbound Sunset Way to create a left-turn lane — plus a combined through and right-turn lane — at the intersection.

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Undercrossing construction prompts road closure

August 10, 2010

NEW — 8 a.m. Aug. 10, 2010

Prepare for a road closure related to Interstate 90 Undercrossing construction.

From Monday until Nov. 1, Southeast 62nd Street closes from East Lake Sammamish Parkway to the 600 block of 221st Place Southeast in order to accommodate construction.

Transportation planners intend for the north-south link to cut traffic on existing Issaquah roads. Plans call for the completed roadway to run from the traffic signal at the post office along Northwest Gilman Boulevard, form a T-shaped intersection at Southeast 62nd Street, continue along 221st Place Southeast and then end at Southeast 56th Street.

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Construction begins on I-90 Undercrossing

May 11, 2010

Backhoes clear ground May 7 for the new Interstate 90 Undercrossing in the 400 block of Northwest Gilman Boulevard as a postal carrier next door departs the Issaquah Post Office to deliver mail. By Greg Farrar

Construction started last week on the long-planned Interstate 90 Undercrossing, a road link meant to alleviate traffic congestion along Front Street North, Northwest Gilman Boulevard and other well-traveled Issaquah streets.

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Construction starts on I-90 Undercrossing

May 5, 2010

NEW — 3:10 p.m. May 5, 2010

Construction started Monday on the long-planned Interstate 90 Undercrossing, a road link meant to alleviate traffic congestion on Front Street North and state Route 900.

Expect lane restrictions along Northwest Gilman Boulevard from 8 p.m. until 6 a.m. May 10-14 as crews conduct utility work.

The undercrossing will link Northwest Gilman Boulevard to Southeast 56th Street via a two-lane roadway built from the traffic signal at the post office.

In March, the City Council awarded a $1.46 million contract to a Kirkland company, MidMountain Contractors, to build the connector and a 12-inch water line. The project includes curb and gutter work, installation of sidewalks and traffic signals, and landscaping.

The city counts on the undercrossing to remove about 2,000 to 4,000 vehicles from Northwest Gilman Boulevard and 3,000 to 6,000 from Front Street North each day. Gilman Boulevard handles 29,000 vehicles per day; Front Street handles 49,000.

City seeks bids for I-90 Undercrossing

February 2, 2010

The city is accepting construction bids for the Interstate 90 Undercrossing, a long-planned connector from Northwest Gilman Boulevard to Southeast 56th Street. Read more

City seeks contractor for long-planned I-90 Undercrossing

January 27, 2010

NEW — 6 a.m. Jan. 27, 2010

Officials seek construction bids for the Interstate 90 Undercrossing, a long-planned connector from Northwest Gilman Boulevard to Southeast 56th Street.

City Public Works Engineering Director Bob Brock put the project out to contractors for bid after the City Council cleared a final pre-development hurdle last week.

After the city receives bids, Brock expects staffers will select a finalist within the next few weeks. He hopes for the City Council to award the contract in March. The sluggish economy could make for bids at lower amounts than officials expect.

Officials budgeted about $3 million for undercrossing work in 2010. The overall cost of the endeavor included in the Capital Improvement Plan — a sweeping guide to all types of city projects — is $13 million.

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