| 2024 - Government of Prince Edward Island |
| 2023 - Road Commission for Oakland County, Chapter 7 - Region 5 |
| 2022 - Northern Colorado Water Conservancy District, Chapter 6, Region 9 |
| 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 |