Using a three-in-one approach, Garney Construction has successfully bored a single tunnel through rock and beneath an interstate highway, two rail lines and a creek, as part of the Southern Delivery System (SDS) water project in Colorado.The mile-long dig was the critical piece in a 50-mile pipeline which will transport freshwater from the Pueblo Reservoir to Colorado Springs and the nearby communities of Fountain, Pueblo West and the Security Water District. The bore was executed as a design-build contract, taking just over 10 months to complete. Cost was roughly $20 million.Bill Williams, project manager for Garney, explains that the original design
