On December 2, 1931, this route became an extension of SH 9. On June 2, 1932, SH 115 was redesignated on a new route as a short route between Pyote through Wink to Kermit.
This passage describes the evolution of a road route over time, with SH 9 becoming an extension of the original route and SH 115 being reassigned to a new path between Pyote, Wink, and Kermit.