Wasatch Constructors has announced new I-15 construction-related closures that begin Monday evening.

Northbound I-15 between 2100 and 4500 South and southbound I-15 between I-80 east and 5300 South will be closed from 10 p.m. Monday to 6 a.m. Tuesday. State Street is the designated alternate route.Bridge demolition will close 300 North beneath I-15 Monday through Sunday. The closures will take place from 10 p.m. to 6 a.m. except Friday from 10 p.m. to 8 a.m. and Saturday from 8 p.m. to 8 a.m. North Temple is the designated alternate route.

Crews will close 3300 South beneath I-15 Monday from 10 p.m. to 6 a.m. Motorists can use 3900 South as an alternate.

From 7 a.m. to 5 p.m. Tuesday and Wednesday, 6400 South beneath I-15 will be closed. Eastbound motorists can use 5900 South; westbound motorists can use 7200 South.

The eastbound 2100 South freeway between Bangerter Highway and 3299 West will be closed Monday from 10 p.m. to 6 a.m. Motorists can use the frontage road on the south side of the freeway.