GHA provided complete site engineering for the 150-acre campus and the 645,000 square foot hospital, which included over 2,000 surface parking spaces, 1.4 miles of onsite roadways, and a combined total of over 5 miles of water main, storm sewer, and sanitary sewer.

The main lake was designed with a surface area of 15 acres and a depth of 17 feet to support the Hospital’s geothermal heating and cooling systems which run in a closed loop system at the bottom of the lake. The geothermal lake, along with three other onsite ponds, provide over 51 acre-feet of stormwater detention to comply with Kane County Stormwater Management ordinances and City of Elgin standards. The site detention ponds were sized to accommodate future hospital expansions and roadway widening improvements. Over 3,200 linear feet of vegetative swales were incorporated into the design of the onsite stormwater conveyance systems, in lieu of conventional storm sewers, to reduce construction costs, encourage groundwater recharge, reduce runoff volume, and improve stormwater quality.