$2 billion, 20-story-deep DigIndy tunnels complete in Indianapolis
(UI) — After more than a decade of construction, Indianapolis has completed its massive $2 billion DigIndy Tunnel System, a 28-mile underground network designed to capture and treat sewage and stormwater before it reaches local waterways, according to Mirror Indy.
The deep rock tunnels, built roughly 20 stories beneath the city, are engineered to intercept combined sewer overflows during heavy rain, directing the excess flow to treatment facilities instead of allowing it to enter rivers and streams.
Officials with Citizens Energy Group, which led the project, said the new system will now prevent at least 95% of sewage and stormwater discharges, significantly improving water quality and reducing flood risks across Indianapolis.
“Environmentally speaking, it’s a huge impact because we are eliminating billions of gallons of sewage that would have normally go to the river system,” said Michael Miller, manager of the DigIndy program.
Local business owners, including canoe rental operator Peter Bloomquist, said the improvements are already visible. “This is going to change our waterways,” he told reporters. “We’re seeing less pollution and more wildlife returning to the White River.”
More than 150 city leaders, engineers, and project partners gathered in White River State Park to mark the tunnel system’s completion — a milestone that city officials say ushers in a new era for both urban water management and environmental restoration, as reported by Mirror Indy.
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