Just to help you avoid any trouble, the bridge gator is speaking of is not closed to traffic at all. However, once you cross it there is no access to the public lands it is blocked by several pieces of private both in Colorado and New Mexico. Clearly posted as such and has locked gates as well. If you go to the state land office website, you can download an overlay for google earth that has the land status for the Carson Natl Forest, most people don't realize there is private up there but there is.
Also, I hate to assume things but Gator, but if your friend was wading the river it is very likely he was either crossing Southern Ute land or Private. I am not aware of any public land in Colorado where you are speaking about. Utehunter could chime in as he knows that portion of Colorado really well. Again, not accusing anything, just raising the point.
In addition to Bloomfield and Dulce, there is gas below the Dam at Abes. Depending on where you are at the time, you could be closer to Bloomfield, Dulce, or Abe's. It's a big unit. Good luck on the hunt, you will see a lot of bucks no doubt! Surprisingly tough hunt though even with the number of bucks.
Hunt Hard. Shoot Straight. Kill Clean. Apologize to No One.