Site work and renovation of a civil project in Lewisville, Texas. Completed plans call for the renovation of a water / sewer project; and for site work for a water / sewer project.

Upper Trinity Regional Water District (District) owns and operates the Thomas E. Taylor Regional Water Treatment Plant (Taylor WTP) located in Lewisville, Texas. The WTP was originally constructed in 1995 and has undergone two expansions (Phase I and Phase II) to reach a current rated capacity of 70 million gallons per day (MGD). To meet the demands of the rapidly growing area, the District plans to expand the WTP capacity to an ultimate capacity of 157 MGD in four phases. First up is Phase III, designed to uprate the plant from 70 MGD to 85 MGD. During construction activities the Taylor WTP must be able to operate and can only be taken out of service during low demand times for short periods of time. TOM TAYLOR WTP EXPANSION - PHASE IIIA (UNDER EXISTING CONTRACT) In summary, Expansion Phase IIIA includes the "Long-Lead Facilities" listed below: o Filter Complex No. 1: Adds four (4) dual-media filters to increase filtration capacity to 85 MGD. o The First set of Early Procured Equipment including Underdrains, GAC Media, and Valves, Gates, and Actuators for the filter and backwash structure only. o Interim improvements to maintain plant capacity during construction activities. TOM TAYLOR WTP EXPANSION - PHASE IIIB (THIS WORK PACKAGE) In summary, the Phase IIIB Expansion includes construction of the following: Package 2 & 5 Pre-procured Equipment includes: a backup generator with ATS and paralleling switch gear, ozone system equipment, onsite sodium hypochlorite generation equipment, plate settlers, flocculators, Backwash Recovery pumps, Sludge Collectors, chemical feed pumps, chemical storage tanks, VFDs, specialty valves, and any other long-lead equipment. Settled Water Channel Isolation and Bypass: Adds a bypass to route water from the settled water basins and effluent weir channel to the ozone contactors to allow for maintenance and isolation of the settled water channel. Raw Water Meter Vaults: New magnetic flow meters with vaults and modified raw water piping. Rapid mix modifications and additional flow meters and modulation modifications. Flocculation and Sedimentation Basin Improvements: Uprate Basins 1 and 2 by 7.5 MGD each (for a total of 15 MGD) by modifying the flocculation zones and adding plate settlers and hoseless sludge collectors to the sedimentation zones. Replace the sludge collectors in Basins 3 to 6 with hoseless sludge collectors. Repair the Basin 3 construction joint. Backwash Recovery Basin and Recycle Pump Station: Adds a backwash recovery basin and recycle pump station to separate backwash waste from the lagoon. Ozone System Improvements: Replaces the existing ozone diffusers with a side stream ozone injection system and modifies the ozone contactors to increase the hydraulic throughput to 85 MGD. Expands the liquid oxygen (LOX) system by replacing the existing ozone generators, destruct units, supplemental nitrogen system, and monitoring equipment. Adds a chilled water system. Onsite Sodium Hypochlorite Generation (OSHG) Equipment Expansion: Adds a new generator and any necessary ancillary equipment to provide a firm OSHG capacity of 85 MGD. Includes the addition of air conditioning to the OSHG room to allow for OSHG operation during hot summer days. Chemical Feed and Storage Additions: Adds sodium hydroxide storage and containment (85 MGD capacity) and replaces the ammonium hydroxide system with LAS (85 MGD capacity). Electrical, Instrumentation, and Controls: Add a backup generator with ATS and paralleling switch gear. All other miscellaneous electrical improvements and process control additions and/or changes to support the plant uprating to 85 MGD. Sitework and Grading: All necessary sitework and grading to construct the above listed. LAKE LEWISVILLE RAW WATER PUMP STATION (LLRWPS) IMPROVEMENTS In summary, the LLRWPS Improvements includes construction of the following: Replacement of existing 7 mgd pump with 30 mgd pump (including VFD) Replacement of 4 VFDs Rebuilding existing pumps Miscellaneous piping and valves replacements New generator Miscellaneous building modifications to improve equipment accessibility and maintenance Miscellaneous HVAC modifications Question Deadline 01/24/2025 at 2:00 PM CT