I-29/20th interchange project moves into 2nd construction phase Tuesday

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2-way traffic to be moved to northbound lanes of I-29

BROOKINGS – The South Dakota Department of Transportation says that the construction of the 20th Street South interchange bridge structure on Interstate 29 near Brookings is scheduled to move into the second phase (west half) on Tuesday.

Two-way traffic through the I-29 construction zone will be adjusted to the northbound lanes from 2 miles north of exit 127 to just south of exit 132. Currently, two-way traffic is using the southbound lanes through this area.

Speed reduction of 65 mph will be in effect on I-29 through the two-way traffic area, with a speed reduction to 45 mph when work is being completed directly adjacent to the roadway. An 11-foot width restriction will be in place throughout the construction zone.

Motorists are asked to be aware of suddenly slowing and merging traffic, changing work zone locations, reduced speeds through the work zone, and construction workers and equipment adjacent to the driving lanes.

The prime contractor for the $15.3 million project is Bowes Construction Inc. of Brookings.

Construction of the bridge structure and all grading operations are scheduled to be completed in 2022, with the surfacing and final project completion scheduled for July 14, 2023.

For further information about the project, contact project manager Waylon Blasius at 605-692-6342 or SDDOT Engineering Supervisor Jeff Brink at 605-882-5166.

Project information is also available on the SDDOT website at https://dot.sd.gov/brookings-pcn-020v.

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