In 2005, the road was turned over to Dodge County, which now maintains it as County Trunk Highway DJ (CTH-DJ).

[2][3] Then, in 1923, without any prior significant changes, the route was relocated in favor of WIS 80's northern extension.

[4][5] Shortly after paving the entire route with concrete, WIS 15 moved onto WIS 115, superseding this route in the process.

[6][7] In 1926, WIS 115 was reestablished in response to the introduction of the U.S. Highway System, specifically US 118.

In 2006, the route was removed in favor of transferring it to local control (replaced by CTH-DJ).