| | Acc. No. | Year | Location | County | Observers |
| 1999-171 | 1999 |
Valco Ponds
| Pueblo | Ric Olson, Dave Quesenberry, Mark Janos, Brandon Percival, Peter Gent, Tony Leukering |
| 2006-177 | 2000 |
Pueblo Reservoir area
| Pueblo | Tony Leukering |
| 2002-075 | 2000 |
Prince Lakes, Erie and Thomas Reservoirs
| Boulder & Weld | John Vanderpoel, Tony Leukering |
| 2005-009 | 2005 |
Cherry Creek State Park
| Arapahoe | Glenn Walbek, Brandon K Percival, Tony Leukering |
| 2006-168 | 2006 |
Lake Loveland
| Larimer | Nick Komar |
| 2007-003 | 2007 |
Pueblo Reservoir area
| Pueblo | Brandon Percival, Bill Maynard |
| 2007-015 | 2007 |
Black Hollow Reservoir
| Weld & Larimer | Nick Komar, Larry Semo, Kevin Keirn |
| 2007-016 | 2007 |
Black Hollow Reservoir
| Weld | Nick Komar, Larry Semo |
| 2008-011 | 2008 |
Valmont Reservoir complex
| Boulder | Brandon Percival, Bill Schmoker |
| 2008-020 | 2008 |
Lake Loveland
| Larimer | Nick Komar, Andrew Spencer |
| 2008-144 | 2008 |
Pueblo Reservoir area
| Pueblo | Tony Leukering, Paul Hurtado, Bill Schmoker, Cole Wild |
| 2009-013 | 2009 |
Jumbo Reservoir State Wildlife Area
| Logan | Chris Wood |
| 2010-003 | 2010 |
Valmont Reservoir complex
| Boulder | Bill Schmoker |
| 2010-013 | 2010 |
Windsor
| Weld | Nick Komar |
| 2010-164 | 2010 |
Namacqua Road Pond
| Larimer | Nicholas Komar, Glenn Walbek |
| 2014-092 | 2010 |
Cherry Creek State Park
| Arapahoe | Bruce Cyganowski |
| 2011-160 | 2011 |
Timnath Reservoir
| Weld | Steve Mlodinow |
| 2011-183 | 2011 |
Aurora Reservoir
| Arapahoe | John Drummond |
| 2012-006 | 2012 |
Broomfield
| Broomfield | Steve Mlodinow |
| 2012-021 | 2012 |
Jackson Reservoir
| Morgan | Steve Mlodinow |
| 2012-023 | 2012 |
Prewitt Reservoir State Wildlife Area
| Washington | Steve Mlodinow |
| 2012-024 | 2012 |
Prewitt Reservoir State Wildlife Area
| Washington | Steve Mlodinow |
| 2012-051 | 2012 |
Panama Reservoir area
| Boulder | Ted Floyd |
| 2012-027 | 2012 |
Prewitt Reservoir State Wildlife Area
| Washington | Steve Mlodinow |
| 2012-039 | 2012 |
Prewitt Reservoir State Wildlife Area
| Washington | Steve Mlodinow |
| 2012-040 | 2012 |
Saint Vrain State Park
| Weld | Steve Mlodinow |
| 2013-061 | 2013 |
Pueblo Reservoir area
| Pueblo | Brandon K Percival |
| 2013-093 | 2013 |
Broomfield
| Broomfield | Luis Matheus |
| 2013-043 | 2013 |
Teller Lake #5
| Boulder | David Dowell, Glenn Walbek, Norm Lewis |
| 2013-124 | 2013 |
Stewart's Pond
| Weld | Steven Mlodinow |
| 2013-126 | 2013 |
Black Hollow Res.
| Weld | Steven Mlodinow |
| 2014-005 | 2013 |
Lake Loveland
| Larimer | Nicholas Komar |
| 2014-095 | 2013 |
Walden Ponds/Sawhill Ponds Complex
| Boulder | peter burke |
| 2014-006 | 2014 |
Aurora Reservoir
| Arapahoe | Steven Mlodinow, Mark Minner-Lee, Nicholas Komar |
| 2014-042 | 2014 |
Aurora Reservoir
| Arapahoe | Steven Mlodinow, David Dowell |
| 2014-036 | 2014 |
Woods Lake State Wildlife Area
| Weld | Steven Mlodinow |
| 2015-003 | 2014 |
Boulder Reservoir
| Boulder | David Dowell |
| 2015-001 | 2014 |
Larimer County Landfill
| Larimer | Steven Mlodinow |
| 2015-004 | 2014 |
Lagerman Reservoir and the Swede Lakes
| Boulder | David Dowell, Steven Mlodinow |
| 2015-006 | 2014 |
Larimer County Landfill
| Larimer | Steven Mlodinow |
| 2015-015 | 2015 |
Barr Lake State Park
| Adams | David Dowell |
| 2015-028 | 2015 |
South Platte Greenway Gravel Pits (south section)
| Adams | David Dowell |
| 2016-056 | 2016 |
Windsor
| Weld | Steven Mlodinow |
| 2016-098 | 2016 |
Barr Lake State Park
| Adams | Steven Mlodinow |