| | Acc. No. | Year | Location | County | Observers |
| 55-73-100 | 1973 | Mouth of e. fork of Parachute Cr. | Garfield | A. G. Smith |
| 55-77-45 | 1977 | Bear Canyon | Boulder | Steve Larson |
| 55-78-59 | 1978 | Mesa De Maya | Las Animas | J. Sundine |
| 55-82-22 | 1982 | Bonny Res. | Yuma | Judy Ward |
| 55-85-28 | 1985 | Mesa De Maya | Las Animas | Dan Bridges |
| 55-85-29 | 1985 | Mesa De Maya | Las Animas | Dan Bridges |
| 55-85-18 | 1985 | Kim | Las Animas | Vic Zerbi |
| 55-88-23 | 1988 | Mesa De Maya | Las Animas | Peter Gent |
| 55-89-52 | 1989 | s. side of Royal Gorge bridge | Fremont | J. Howard |
| 55-90-67 | 1990 | Royal Gorge bridge s. end | Fremont | N. Walker |
| 55-92-69 | 1992 | Mesa De Maya | Las Animas | Dan Bridges |
| 55-92-44 | 1992 | Cortez | Montezuma | Gerald and Maxine Flyer, Karen Harbaugh, Doug Muscanell |
| 55-93-66 | 1993 | Pueblo City Park | Pueblo | Brandon Percival, Mark Janos |
| 55-93-31 | 1993 | E. rim of Sheep Canyon | Pueblo | D. Johnson |
| 1997-103 | 1994 | Mesa De Maya | Las Animas | T. VanZandt |
| 2000-143 | 2000 | Fairmount Cemetery, Lamar | Prowers | Chris Wood, Dave Leatherman |
| 2002-104 | 2002 | Chico Basin Ranch | El Paso | Tony Leukering |
| 2002-173 | 2002 | Golden | Jefferson | Brenda Burrell |
| 2003-49 | 2003 | southern Huerfano County | Huerfano | Roger Linfield |
| 2013-254 | 2004 | 5 miles south of Tobe | Las Animas | Steve Olson |
| 2005-60 | 2005 | NW corner of intersection of Huerfano CR 310 and the railroad tracks, approximately half a mile west of exit 42 on I-25 south of Walsenburg | Huerfano | Brandon K Percival, Nathan Pieplow |
| 2006-110 | 2006 | Bader Ranch near Kim | Las Animas | Andrew Spencer, Cole Wild |
| 2008-48 | 2008 | below Two Buttes Dam | Baca | Andrew Spencer |
| 2011-75 | 2011 | Reed Canyon | Las Animas | John Drummond, John Drummond |
| 2012-223 | 2012 | N 37 deg. 09 ' 32"410', W 104 deg. 36' 10"W. 8/10s of a mile west of mile marker 65, St. Hwy 12 | Las Animas | Polly Neldner |
| 2012-224 | 2012 | N 37 deg. 09 ' 32"410', W 104 deg. 36' 10"W. 8/10s of a mile west of mile marker 65, St. Hwy 12 | Las Animas | Polly Neldner |
| 2018-048 | 2018 | Chico Basin Ranch, Rose Pond | Pueblo | Brandon K. Percival |
| 2019-003 | 2019 | Colorado Springs | El Paso | George Cresswell |