Problem: The city of Wheatland, Missouri, was experiencing severe inflow and infiltration that caused lagoon level fluctuations during heavy rainfall events and placed additional strain on wastewater treatment operations. Aging concrete and brick manholes throughout the system were allowing groundwater intrusion, accelerating structural deterioration and increasing operational costs. With limited municipal resources, full system replacement was not feasible. When ARPA funding became available, the city sought a high-performance rehabilitation solution capable of delivering measurable I&I reduction and long-term structural protection.
Solution: The city partnered with Midwest Infrastructure Coatings to implement the OBIC Armor Multi-Layer System. Over a four-month period, MIC rehabilitated 260 manholes (all but two in the system) and lined approximately 1,100 vertical feet of manhole surface. The multilayer system consisted of a polyurea base layer for moisture sealing and adhesion, a structural polyurethane foam layer for added strength and a seamless corrosion-resistant polyurea topcoat.
Result: Post-installation, city officials reported significant reductions in lagoon fluctuation during wet weather events, indicating substantial I&I mitigation. The rehabilitation restored structural integrity, reduced infiltration pathways, minimized treatment stress and extended the service life of critical wastewater infrastructure without full replacement. 866-636-4854; www.obicproducts.com
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