I-15 through downtown Salt Lake City will be closed for the next four nights while workers position girders for the 600 North interchange.

Wasatch Constructors announced Monday it will close northbound I-15 between 600 South and 1000 North from 10 p.m. to 6 a.m. Tuesday, Wednesday and Thursday nights, and from 10 p.m. to 8 a.m. Friday night and into Saturday morning. During the same hours, southbound I-15 will be closed from 1000 North to 500 South.Also on the same nights and times, eastbound U-201 will be closed between Redwood Road and 300 West, and westbound U-201 will be closed from 300 West to 900 West.

The I-15 reconstruction schedule is subject to change. For the latest updates, call 1-888-INFO-I15 or check the contractor's Web site at (www.I-15.com).