Excellent. I believe that this is roughly correct, feel free to move it if you discover I have err'd. https://www.openstreetmap.org/node/12191952580/history#map=19/39.071485/-108.447215 

Fun to see OSM on the community center page! https://www.mesacounty.us/resident-resources/clifton-community-center

The last drop box in Mesa that remains out of my grasp is listed at the Mesa Fairgrounds. I'll keep sleuthing.

