Underground work for Falls Church’s new Founders Row project will shut down lanes during rush hour on W. Broad St. in each direction starting Thursday morning and lasting until Friday afternoon.

A press release from the City of F.C. reports that due to “unexpected” and “unavoidable” sewer work needed for the project, the 900 block of W. Broad St. — from West St. to Oak St. — will be limited to one lane in each direction beginning 9 a.m. Thursday through as late as 3:30 p.m. Friday. The City says the closure is likely to cause delays and urges drivers to seek alternate routes.

Lane closures and disruptions have affected traffic on both W. Broad St. and West St. since work began on the 4.3 acre Founders Row project, the biggest mixed-use development project in City history, earlier this year. The project is scheduled to be completed by late 2021.

“The City apologizes for any delays and appreciates the understanding of commuters and residents,” the City said in its release.