_web HKS - Gravel Pit-12_web HKS - Gravel Pit-3_web HKS - Gravel Pit-2 Albert Frei Recycled Materials Category: Commercial, Retail, Mixed-use HKS ServicesCivil EngineeringLand SurveyingWater Resource Engineering Developer Albert Frei & Sons Project Location Henderson, CO Project Information 53.2 Acres Gravel pit operation