First Street between Coleman Street and Church Street in Prosper is scheduled to reopen Tuesday, Aug. 11, after a four-day closure for underground utility installation as part of the town's $27.79 million road-widening project.

The Town of Prosper posted a traffic advisory announcing the closure began Friday, Aug. 7, blocking through traffic on the segment while crews installed underground utility lines. The town has not confirmed the road reopened on schedule.

The closure is one piece of Prosper's broader First Street widening project, which will transform the road from a two-lane rural route into a four-lane divided arterial stretching from the Dallas North Tollway to Coleman Street. The project also includes drainage improvements, water line upgrades and a new roundabout.

Prosper Town Council approved the project's major contracts at its Feb. 10 meeting: a $21.29 million construction agreement with Mario Sinacola & Sons Excavating Inc., a $408,815 materials testing contract and a $1.62 million agreement with BNSF Railway Company for signal and at-grade crossing improvements along the corridor.

Senior engineer Lindy Higginbotham told the council at its Feb. 10 meeting that construction was scheduled to begin in April and is projected to wrap up in November 2027.

The project had been delayed from its original timeline due to franchise utility relocations and easement acquisition issues, Community Impact reported.

A prior phase of First Street construction, from Stuber Elementary to Dallas Parkway, cost $30.39 million and wrapped up in December 2025.

This project is separate from the North Texas Tollway Authority's $459.7 million Dallas North Tollway Extension Project, which has also caused lane closures on Dallas Parkway in Prosper and Celina.

The town has not announced a next public meeting or comment period specific to this project.