| 2021 - Metropolitan Water District of Southern CA |
| 2019 - LA Metro, Chapter 1, Region 1 |
| 2018 - State of Utah DOT |
| 2017 - Santa Clara Valley Water District |
| 2016 - Sacramento Municipal Utility District (SMUD) - Chapter 27, Region 9 |
| 2015 - City of Ottawa - Chapter 63, Region 8 |
| 2014 - City of Aurora - Chapter 6, Region 9 |
| 2013 - Alberta Infrastructure - Region 10 |
| 2012 - City of Edmonton - Region 10 |
| 2011 - Prince Edward Island DOT Infrastructure - Region 8 |