Our team carried out the renovation of the sedimentary system of the Kohtla-Järve wastewater treatment plant. Specifically, we repaired the concrete surface of the wheel base and poured a new special mortar with very high compressive strength on the wheel track. We cleaned the overflow channel of sediment and decayed concrete; then we repaired and leveled the concrete surfaces and covered the canal walls and bottom with Sika’s polyurethane-based waterproofing system.