ROSE QUARTER UNDERGROUND: LOOKING AT CONDITIONS FROM THE BOTTOM UP

CREWS WILL BEGIN UTILITY MAPPING AND SOIL AND HAZARDOUS MATERIALS SAMPLING THIS WINTER

Utility mapping nighttime work starts in December

Utility mapping and investigation work will begin in December and continue through March. Work will occur on or near I-5, local streets, and the Rose Quarter Transit Center. Crews will collect and record the locations of underground utilities to inform design and construction planning with short-term traffic impacts and little noise.

Here’s what you can expect from the utility mapping work:

Work dates: December through March
Nighttime work: Mon-Sat, 8 p.m. to 5 a.m.
Temporary closures and detours for people walking, biking, rolling, driving, and on transit

Soil and hazardous materials sampling to start in December

Crews are expected to begin collecting soil and other material samples throughout the Rose Quarter area in early December and continue through April. Sampling will occur on and near I-5 at nighttime and along several local streets primarily during the day. The work will ensure that designs are appropriate for local soil conditions and that construction activities are done safely.

What you will see and hear

Soil sampling will be conducted by heavy machinery: a truck-mounted rig for most locations and a track-mounted rig for sites that are difficult to access (shown below). The work involves digging holes approximately 8 to 12 inches wide and up to 120 feet deep. They will be covered while not in use and backfilled within approximately two weeks.

Hazardous materials sampling will involve collecting small amounts of paint and other materials from bridges and other structures to test for hazardous materials. Crews will also dig and then refill small holes by hand to collect samples from highway shoulders.

You may hear some noise while crews work nearby, but activities will be no louder than typical traffic noises.

Here’s what you can expect from the soil and hazardous materials sampling work:

Work dates: December through April
Daytime work: Mon-Fri, 8 a.m. to 5 p.m.
Nighttime work: Mon-Sat, 8 p.m. to 5 a.m.
Temporary closures and detours for people walking, biking, rolling, and driving

Visit ODOT’s Weekly Construction Update and visit TripCheckimage linked to trip check website for details on specific closures and detours – updates will be posted regularly until work is complete.

Utility work will occur on or near I-5, local streets, and the Rose Quarter Transit Center

Sampling will occur on and near I-5 at nighttime and along several local streets primarily during the day.