GULFPORT, Miss. (WXXV)- Gulfport is announcing another road closure scheduled for Monday, August 23. 20th Street between Henderson and Thornton Avenues will see the closure due to a sewer cave-in repair project. That work starts Monday morning at 8 a.m. and is expected to reopen by 3 p.m. Friday. Henderson Avenue, 19th Street, and Thorton Avenue will serve as the designated detour route. Drivers are asked to use caution in these areas and to fol…