Eastbound I-90 lanes closed near Piedmont for bridge project

Posted: Updated:
PIEDMONT, S.D. -

The South Dakota Department of Transportation is entering Phase 4 of a five-phase plan to reconstruct Interstate 90 and replace bridges between Exits 40 and 44.

Beginning March 5, two miles of the eastbound lanes of I-90 from Exit 44 at Piedmont, going west, will be closed.

During this phase, work includes grading, concrete surfacing and the construction of new bridges at Exit 44 and over Little Elk Creek. Eastbound traffic will be routed to the westbound lanes of I-90 where traffic will be in a two-way configuration. Exit 44 will be closed with a detour route provided via Exits 40 and 46 along with the Spring Valley Road service road and Sturgis Road.

The closure is anticipated to remain in place through late July when the interstate will be reopened for the Sturgis Motorcycle Rally.

Work already completed:

  • Phase 1 included box culvert extensions along the westbound lanes
  • Phase 2 involved the reconstruction of the westbound lanes near Exit 44, going west for about two miles, as well as new bridges at Exit 44 and Little Elk Creek.
  • Phase 3 was completed after the Sturgis Motorcycle Rally last year and included the reconstruction of the remaining portion of the westbound lanes to Exit 40.

Phase 5 will reconstruct the remaining portion of the eastbound lanes of I-90 to Exit 40. As part of the project, grading for three lanes in each direction will be done, however, only two lanes will be paved in each direction now. There is no current time table for paving of the third lanes.

Motorists are asked to be prepared for suddenly slowing traffic and merging traffic, as well as construction workers and equipment adjacent to the roadway.

Heavy Constructors, Inc. of Rapid City is the prime contractor on this $29 million project. The overall completion date for the project is June 14, 2019.


Information from the South Dakota Department of Transportation

Today's Forecast
/