38.665154, -105.226300

Completed in 1942 as a drainage tunnel from Vindicator to Marigold. This tunnel further increased the drainage abilities of the deeper mines around Victor. The tunnel was dug so straight it was possible to see the tiny pinpoint of light opening a little over 6 miles away. It allowed mines like the Ajax, Portland 2 and Cresson to reach depths between 2,300 and 3,000 below the surface without flooding. Water from the Carlton Tunnel still flows adjacent to Fourmile Creek.

Listen to a narration about the Carlton Tunnel: