Denver Water conducted a subsurface investigation program from June through Oct. 2018 to support design of the Gross Reservoir Expansion Project. This work took place in various locations on the south side of Gross Reservoir. The locations were chosen because they represent areas where knowledge of the subsurface conditions would inform work currently proposed on project features. Land disturbance from the investigation activities were minimal and caused no major disruptions to traffic activities around Gross Reservoir.
The subsurface investigation program included three types of activities described below: