| | 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 |