D3 — original pdf

Backup

Title of Presentation Presentation Date Zebra Mussel Mitigation Update September 9, 2020 Rick Coronado, P.E., Assistant Director, Operations Name of Person, Assistant Director Last presentation to W&WW Commission (3.11.20) W&WW Commission 3.11.2020 - ZM Briefing Update 2 Handcox WTP Intake Cleaning and Inspection May 11-15, 2020 Removed zebra mussel buildup from • Upper intake • Middle intake • 108-inch intake manifold pipe Clean Upper Intake screen Clean Middle Intake screen Handcox WTP Intake Cleaning and Inspection May 11-15, 2020 Extended chemical feed lines • Upper intake • Middle intake Extended feed lines Chemical feed line discharge 4 Temporary copper sulfate feed systems Ullrich and Davis WTPs– target startup in September 2020 5 Zebra Mussel Mitigation Planning/Implementation Other infrastructure inspections / cleanings: • September 3 at Longhorn Dam (Complete) Next intake inspections / cleanings: • • September 14 at Ullrich WTP September 28 at Davis WTP Permanent systems: • Design underway (8/3/20) • • Copper ion generation system – NSF 61 Certified (3/24/20) 8-month design schedule, followed by bid phase – Previous update vendor received FIFRA Registration “Zebra Mussel Free Raw Water Piping 2020” 6