15 - Wastewater Treatment Plant - rehabilitation and replacement

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WASTEWATER TREATMENT PLANT • Existing treatment plant was constructed in 1957, sited on property of a prior wastewater treatment plant built in WWII to serve Camp Maxey. • Expansion projects were made in 1987, 1991 & 1997. • Current permitted capacity is 7.25 MGD. • Annual average flow is 4.63 MGD. • Peak flow has been as high as 9.97 MG (10/16/2018). • Annual electricity costs are $250,000. • The automatic bar screen project was completed 02/2019 ($1M + project). • Rotary sludge press bid was awarded 02/2019; scheduled for delivery/installation 04/2019 ($250K). • Four (4) engineering firms submitted qualifications to our advertisement for RFQs. At the conclusion of a twelve (12) month review and evaluation of qualifications, including site visits to treatment plants designed by each, Garver Engineering was selected as the project engineer for a complete rehabilitation of the WWTP. • We are considering upgrading the treatment plant capacity to 9.5 MGD; in discussion with Garver Engineering, the plan is to construct a facility with an initial lower capacity (based on existing flow data), but to design a plant which can be expanded more readily as future capacity is needed. • An engineering feasibility study was completed in 2010 to determine the needs of the treatment facility. One aspect thoroughly considered was siting of a new plant and/or having an additional treatment plant constructed. It was determined the current location was best suited for proposed improvements/upgrades, with a primary reason being the City of Paris already owns the property, with Garver Engineering being able to design a facility using the current footprint. Also, an additional plant was deemed unfeasible due to increased operation & maintenance, additional staffing, and potential rerouting of collection lines • Engineering design & TCEQ permitting is estimated to take —24 months • Actual construction is estimated at —24 -36 months. • Funding, based on $30M debt for this project, has been estimated to add $6.93 to $7.78/month to a customer's bill. • The existing WWTP is 62 years old, the equipment is labor intensive, and requiring much manpower to stay within TCEQ permitted treatment ranges. Failure of any one component of the treatment process has the potential to cause the facility to be out of compliance, which could result in daily fines and also being required by TCEQ to implement improvements, in addition to the risk of public safety by having improperly treated wastewater. • A completely overhauled WWTP will be more efficient, more reliable and a safeguard to the public health and safety .