KINGSPORT – Installation of water line blow-off valves will require the closure of the southbound lane of Clinchfield Street and complete closure of the 700 block of Fairview Avenue on Wednesday, Sept. 24, 2014, from 8:30 a.m. to 2 p.m. The Clinchfield lane closure will occur between Sullivan Street and Press Street. Meanwhile, Fairview Avenue will be completely closed from Stone Drive to Putnam  Street. Motorists are advised to use caution in the work zone and seek alternative routes wherever possible.