I-90, w/o Spearfish, SD

This project located west of Spearfish, South Dakota, near South Dakota’s border with Wyoming, included 38 lane miles of concrete pavement crack & seat and asphalt overlay. Antigo averaged 6.3 lane miles per day by completing the crack & seat in 6 work days.

The South Dakota DOT Crack & Seat specification required inducing full-depth cracks without loss of interlock at a crack spacing of 24″ +/- 6″. 44 concrete cores were drilled and removed to verify proper cracking was being achieved. The cracked & seated lanes were reopened to traffic for several days prior to beginning the paving of the asphalt overlay.


View Crack & Seat Media

Project Details


I-90, w/o Spearfish, from WY border to w/o USH 85, Lawrence County, South Dakota, USA

Existing Pavement

9.5" thick jointed plain concrete pavement (JPCP) over 3.25" thick lime treated gravel base

New Pavement

4.75" thick asphalt overlay


Crack & seat completed in 6 work days in May, 2016