I-70 CSS SWEEP Working Group
| Colorado Water Quality Control Division | Environmental Protection Agency |
| Clear Creek County | Federal Highway Administration |
| Clear Creek Water Foundation | Town of Georgetown |
| Colorado Trout Unlimited | Town of Vail |
| Colorado Department of Transportation | Upper Clear Creek Watershed Association |
| Colorado Parks and Wildlife | US Army Corps of Engineers |
| Colorado Watershed Association | US Department of Agriculture |
| Comcast | US Fish and Wildlife Service |
| Coors Brewing | US Forest Service |
| Eco Resolutions | Xcel Energy |
