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Alton Wastewater System Enhancements

Wastewater

Alton Wastewater System Enhancements

owner

City of Alton, Missouri

project cost

$5,191,000

Funding Source

Missouri DNR via the American Rescue Plan Act (ARPA)

project description

The City of Alton established its wastewater collection infrastructure in the 1960s. Predominantly made up of vitrified clay pipe, this system has unfortunately succumbed to the inevitable challenges of time. Significant amounts of Inflow and Infiltration (I&I) have been observed during stormwater episodes, primarily due to natural degradation. Furthermore, the wastewater treatment facility, now having outlived its projected operational tenure, mandates the replacement of a substantial portion of its original equipment.

Recognizing the pressing need for system revitalization, the City of Alton entrusted Heartland Engineering with the role of spearheading the design overhaul for both the collection and treatment components. In a significant financial boost to this endeavor, the City successfully procured a $5,000,000 grant through the American Rescue Plan Act (ARPA) to underwrite the essential modifications.

The design strategy encompasses a comprehensive refurbishment of the treatment plant. Notable enhancements include the integration of dissolved oxygen probes, variable frequency drives for the oxidation ditch, and the replacement of rotors, bearings, and shafts. Furthermore, significant portions of supplementary equipment, such as the UV and tertiary treatment apparatus, will be renewed.

Complementing the plant rehabilitation, Heartland Engineering is also committed to optimizing the City’s collection network, emphasizing the resolution of the I&I challenges. The system was video inspected with all results being placed on the City’s GIS site. The inspection was necessary to pinpointing zones necessitating repair. Remedial actions will employ in-situ lining techniques to repair the original clay conduits. Sewer wyes will undergo pressure testing followed by precision grouting. The design blueprint is on track for completion by late-2023, post which, the construction phase is set to be initiated.

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