O’Hare Sunken Caisson Pump Station
Owner:
City of Chicago
Location:
Chicago, Illinois
Architect:
CTE/AECOM, O’Brien and Associates, Inc., Rubinos & Mesia Engineers, Inc.
Contract Value:
$17,000,000
Completion Date:
October 2008
Walsh Construction acted as the general contractor to construct a 60 foot diameter sunken caisson pump station, a concrete spillway, and an intake structure. The work included rock grouting, rock anchors, pipe jacking, support of excavation piling, excavation, reinforced concrete, erosion control, storm sewer installation, service roadway construction, and landscaping. The finished pump station features three 4000 GPM high-flow pumps and two 1100 GPM low-flow pumps. These pumps move the detention basin water through 24” and 20” Ductile Iron process piping. All pumps and valves are managed by the Programmable Logic Controller and Variable Frequency Drives in the structure’s electrical room.
