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.

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) 474-7841


Milwaukee

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

Phone:
​ (414) 238-9189


Denver

7535 East Hampden Avenue Suite 400
Denver, CO 80231

​​​​​Phone:
​(303) 790-9500

Contact Us

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