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County reservoir credited with limiting Carol Stream flood damage after intense July storm
Summary
County officials and trustees credited Armstrong Park reservoir and recent stormwater investments with preventing widespread house flooding during an intense July 4 storm; officials described dewatering, emergency generator activation and 110 hours of pumping at the reservoir.
County and village officials told the Carol Stream Village Board on July 7 that recent stormwater infrastructure — notably the Armstrong Park reservoirs and associated pumps — reduced the scale of residential damage during an intense July storm.
Jim Zay, speaking to the board, said Armstrong Park went into operation early on July 3 and remained pumping for 110 hours, noting the reservoir holds about 37 million gallons. He said a 54‑inch bypass pipe moves water out of the reservoir when it is full, protecting downstream neighborhoods, and credited recent investments and coordination among municipalities for the improved outcome.
Zay said the county installed an emergency generator at the Armstrong Park pumping station (he cited a $350,000 cost) that energized pumps when power failed, allowing continuous operation during outages. County staff told the board they are now dewatering the reservoir slowly to avoid destabilizing the walls.
Several trustees and residents described their neighborhood experiences: rapid onset flooding in some low‑lying streets, cars submerged to hoods in places, and basements affected in a small number of homes. Village officials described rapid activation of CERT volunteers, public works crews and police to respond; most streets were passable again within hours. Mayor Severino and trustees repeatedly thanked county and village staff for their response and for prior investments in stormwater infrastructure.
Trustees also asked staff to conduct a debrief to identify improvements and said they would continue intergovernmental coordination on stormwater funding and communication.
