Interstate 90 - Exit 387 (Hartford)

Project Summary

This project will include reconstructing the standard diamond interchange at exit 387, and replacing the structure over Interstate 90.

The newly constructed corridor of Western Avenue will improve pedestrian facilities and traffic flow through the area.
In conjunction with the SDDOT project, the City of Hartford is continuing the Western Avenue reconstruction from the Diamond Trail intersection to the north of Mickelson Road.

Project Timeline:

Spring 2025 - Nov. 2025 with minor finish work into 2026

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Project Updates:

Dec. 15, 2025:

Beginning at 8 p.m. on Wednesday, Dec. 17, 2025, through 6 a.m. on Thursday, Dec. 18, 2025, the eastbound lanes of Interstate 90 at exit 387 (Hartford) will be temporarily closed to allow crews to set bridge girders over the eastbound lanes. During this overnight closure, eastbound I-90 traffic will be diverted using the exit 387 off- and on-ramps before returning to the Interstate.

The same traffic diversion for westbound I-90 will occur from 8 p.m. on Friday, Dec. 19, 2025, through 6 a.m. on Saturday, Dec. 20, 2025, for bridge girder placement over the westbound lanes. During this overnight closure, westbound I-90 traffic will be diverted using the exit 387 off- and on-ramps before returning to the Interstate.

Western Avenue (County Highway 151) will remain open during both overnight operations. Traffic on Western Avenue will be guided through the work zone by flaggers.

Motorists should expect minor delays and should use caution while traveling through the area. These operations are weather dependent and may be rescheduled if inclement weather occurs.

The prime contractor for this $12.6 million project is D & G Concrete Construction Inc. of Sioux Falls, SD. The overall completion date for this project is June 2026.

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Nov. 21, 2025:

Oct. 15, 2025 – Nov. 15, 2025, Completed Work:
Contractors have completed paving, grading, and pipe installation along Western Avenue and the westbound off-ramp at exit 387. Lighting installation is underway, and crews have begun touch-up grading and general site cleanup.

On the bridge, pile driving at both abutments is finished. The bent footing, column, and cap are now fully completed.

Anticipated Work Nov. 15, 2025 – Dec. 15, 2025:
Contractor crews will continue site cleanup, install temporary pavement markings for winter, and complete lighting installation throughout the corridor.

The bridge contractor is scheduled to set the Phase 2 bridge girders in early December and will continue periodic work through the winter. Construction will carry over into 2026, with traffic control expected to be reinstalled in the spring of 2026. Field work is scheduled for completion by June 2026.

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April 8, 2025 - Press Release:

On Monday, April 14, 2025, construction work begins on Interstate 90 (exit 387) at Hartford. During the construction project, lane closures will be placed at various times on the eastbound and westbound lanes of I-90. Speed limits will be reduced to 65 mph through the work zone on I-90.

The project also includes work on Western Avenue from south of Jeffrey Street to Diamond Trail in Hartford. A two-way traffic configuration will be placed on Western Avenue.

This project will include reconstructing the standard diamond interchange at exit 387 and replacing the structure over I-90. Western Avenue will be reconstructed as a three-lane roadway with a center left-turn lane, curb and gutter, sidewalk, and a shared use path. Additionally, the City of Hartford will have a project starting that extends the reconstruction of Western Avenue from Diamond Trail to the north of Mickelson Road. Motorists are asked to stay alert for workers, equipment, and slowed traffic through the work zone.