Engineering Resource Associates
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Low-Impact Development

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Cosley Zoo, Wheaton Park District
ERA provided survey, civil engineering, and environmental services for the zoo facility upgrades over a five-year period. The upgrades focused on green infrastructure opportunities, including a 15,000 square foot wetland-bottom detention basin, a 46,500 square foot permeable paver parking lot, and 4,500 square feet of bioswales and rain gardens. ERA also analyzed and designed upgrades to ADA parking and pedestrian features.

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WARRENVILLE

3S701 West Avenue
Suite 150
Warrenville, IL 60555

Phone:
​630.393.3060


CHAMPAIGN

2416 Galen Drive
Champaign, IL 61821

Phone:
​217.351.6268


CHICAGO

10 S. Riverside Plaza
Suite 875

Chicago, IL 60606

Phone:
​312.470.6044


MILWAUKEE

342 N. Water Street
Suite 600
​Milwaukee, WI 53202

Phone:
​ 414.238.9189


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Office Hours: 8:00 am - 5:00 pm