CC Agenda Packet 05-14-18 Work Session

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Metropolitan Wastewater Management Commission Capital Improvement Program DECOMMISSION WPCF LAGOON Description: This project decommissions the existing biosolids lagoon at the Water Pollution Control Facility (WPCF). Status: As of January 12, 2018: The project is in the design phase. The MWMC hired a consultant in December of 2014 to create a bid package to decommission the lagoon. Lagoon decommissioning onsite work is anticipated by summer of 2019, and the schedule is subject to change based on progress of the construction of the fourth digester improvements. Justification: The lagoon was constructed in 1979 as a temporary biosolids storage facility while the Biosolids Management Facility was under construction. Since that time it has also served as a temporary storage lagoon to support digester cleaning operations. However, the lagoon no longer serves the purpose for which it was originally constructed and does not meet current design standards for wastewater lagoons. Project Driver: The lagoon can no longer provide the biosolids capacity for which it was intended nor cost effectively continue to support digester cleaning operations. The lagoon is almost full of accumulated residual solids. Therefore, the decision was made to decommission the lagoon and change the process of cleaning the digesters. Project Trigger: The WPCF lagoon no longer functions as originally designed. Estimated Project Cost: $5,800,000 Improvement SDC Eligibility: 0% Estimated Cash Flow: FY 13-14 = $1,769; FY 14-15 = $128,550; FY 15-16 = $90,031; FY 16-17 = $18,104; FY 17-18 = $11,546; FY 18-19 = $600,000; FY 19-20 = $4,950,000 Prior2017-18 Expenditure/Category:YearsEst. Act.2018-192019-202020-212021-222022-23Total Design/Construction$238,454$11,546$5,550,000$0$0$0$0$5,800,000 Other$0$0$0$0$0$0$0$0 Total Cost$238,454$11,546$5,550,000$0$0$0$0$5,800,000 Page 54FY 18-19 BUDGET AND CIP