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Two long years of construction are finally wrapping up at Interstate 90, Exit 14 in Spearfish.

It’s all down to the final details for the $28 million project, which is scheduled for final completion on June 1.

According to a May 8 update from the South Dakota Deptartment of Transportation, concrete crews have finished pouring the remaining curb and gutter and the two-foot strip of colored concrete around the perimeter of the islands.

Also finished are all remaining sections of sidewalk and the colored concrete islands. Sawing and sealing of the concrete joints on 27th Street and the ramps will continue for a couple more weeks.

Work on corrective items will continue throughout the project. Installation of the permanent pavement markings should begin after the joint sealing operation is complete.

With the warmer temperatures, crews have resumed grouting and painting work under the bridge. Installation of the permanent signs resumed last week and will continue until all the signs are installed.

The grading contractor has been preparing the median of I-90 for asphalt pavement and cable rail. Crews are also preparing the area in front of the south wall for asphalt pavement.

Asphalt paving in the median and along the south wall should be completed this week. Crews will continue to place and shape topsoil along 27th Street as needed.

Crews plan to finish the corrective work in both westbound passing lane and eastbound driving lanes this week. Once those two lanes are complete, crews will work on corrective items in the westbound driving lane and the eastbound passing lane.

Crews performed bump grinding last week along with grinding in grooves on the ramp surfaces for improved traction.

The electrical contractor continues to work on miscellaneous items throughout the project. The remaining pedestrian push buttons have been installed at the crosswalks.

A cable for the video detection system was damaged a couple of weeks ago. A replacement cable should arrive in six weeks. The traffic signals are operating on a timer system for the time being. This may cause longer wait times.

That should improve once the video detection system is repaired. Later this week, several of the signal heads will be adjusted to line up with the lanes of traffic.

Remaining work includes the following items: permanent signing, interstate median paving, cable rail, bridge end expansion joints, sealing of pavement joints, topsoil placement, seeding and permanent pavement markings.

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