To tap into the vast Denver Basin Aquifer, the town of Castle Rock, Colo., built four new wells at two well houses - Woodlands 1 and Castle Oaks 7.
Connected by 11,000 total feet of new pipeline, these stations convey raw water to the Ray Waterman Regional Water Treatment Center in Castle Rock, where much-needed treated water flows to this fast-growing town on Colorado’s Front Range.
The well sites are located on undisturbed two-acre parcels. One is east of the water treatment facility and the other is west, adjacent to the Founders Parkway (SH-86). The 20-inch pipeline required several thousand feet of additional easement, as well as a jack-and-bore crossing to span the Founders Parkway. The transmission main from the Castle Oaks 7 site crosses McMurdo Gulch, a Federal Emergency Management Agency (FEMA) 100-year floodplain.
HDR teamed with the town of Castle Rock on the design-build project and worked special site grading and construction activity provisions into the design. These provisions - to minimize impacts to McMurdo Gulch - included development of grading and erosion and sediment (GESC) plans to ensure compliance with state, county and town erosion control criteria.
Working closely with Castle Rock staff, HDR developed construction costs and a scope of work for the schedule-driven project. HDR also teamed with local facilities and the pipeline contractors - Clemons Construction and Wildcat Construction - to deliver the project on budget and ahead of schedule.