BCP259 - Lethbridge
N49° 41.382 W112° 51.462
Found with Smrt_geer and XRN95. I was unable to find this the last time that I was in Lethbridge as it was covered with snow and I wasn't going out there to shovel snow. However, today I spent a little time on the shoulder removing some dirt to confirm that the cap was where we thought it was.
Whew, made it back to the truck alive!