| | Acc. No. | Year | Location | County | Observers |
| #2359 | 1906 |
Barr Lake S.P.
| Adams | F.C. Lincoln 1919 |
| 43-93-1 | 1993 |
Chatfield Reservoir
| Douglas | Urling & Hugh Kingery, Joe TenBrink, Larry Norris, Mark Janos, J.B. Hayes |
| 2006-6 | 2006 |
Chico Basin Ranch
| El Paso | Brandon Percival, Bill Maynard, Doug Faulkner, Andrew Spencer, Peter Gent, Cole Wild |
| 2006-18 | 2006 |
Denver
| Denver | Andrew Spencer, Cole Wild, Larry Semo |