KINGSPORT ‚¬ Continuing sewer improvements in the area of Rock Springs Road will require the closure of West Valley Drive between Rock Springs Road and Gustavis Avenue next week between the hours of 8 a.m. and 4 p.m.‚  The work is expected to run from Monday, April 18th thru Friday, April 22nd, weather permitting.‚  The detour route will be Gustavis Avenue to OakHaven Drive to Rock Springs Valley Road to Rock Springs Road. Motorists are asked to plan ahead and use extra caution in the work zone.