SPEARFISH, S.D. – On Monday, April 28, 2025, work will begin to install a High Friction Surface Treatment (HFST) to the Interstate 90 exit 10 (Spearfish) eastbound off-ramp and bridge.
The ramp will be closed with ramp traffic detoured to I-90 exit 12 (Jackson Boulevard). It’s anticipated that the ramp will remain closed until Thursday, May 15, 2025.
This work is a part of an 11-structure project that will install new polymer chip seals and repair bridge joints along I-90 between the Wyoming state line and Whitewood.
The prime contractor on the $3.19 million project is J.V. Bailey Company Inc. from Rapid City, SD. The project completion date is Friday, Oct. 31, 2025.
