Fleming Tank, Pump Station Project

Fleming map

Irvine Ranch Water District is upgrading its drinking water tank and pump station at Santiago Canyon and Silverado Canyon roads. The project started construction in the fall of 2022.

This project will enhance drinking water storage and pumping reliability for customers of Santiago, Silverado, Williams, and Modjeska canyons, and will also be available for emergency fire conditions. (Click here to view a draft rendering of the project.)

The project includes:

• Replacement of the existing 150,000-gallon steel storage tank with a 1.3 million-gallon concrete tank.
• Replacement of the existing pump station with a new, state-of-the-art pump station to increase pumping reliability and redundancy.
• A new pump building with space to serve as an outpost for the District in emergencies.
• New disinfection facilities for water quality management.
• A new building (approximately 1,000 square feet) to house IRWD equipment that is routinely used throughout the canyon areas.
• Miscellaneous improvements to the site and the existing electrical and instrumentation systems.

The existing facilities will remain in service during construction of the new facilities to ensure uninterrupted water delivery to our customers. For more information, please contact IRWD Public Affairs at info@IRWD.com or 949-553-5500.

Construction schedule updates

Week of March 20: Work will continue on the wall reinforcement for the reservoir, weather permitting, with concrete pours to follow.

Week of March 13: Work will continue on the forms for the reservoir walls.

Week of March 6: Crews will be working on forms for the wall assembly.

Week of Feb. 27: Pouring of the reservoir floor is scheduled to take place this week, weather permitting. Once that is completed, forms will begin to be installed to pour the walls.

Week of Feb. 20: Rebar installation will be completed this week, followed by the setting of seismic cables. Pouring of the reservoir floor is expected to take place in late February.

Week of Feb. 13: Work will begin this week on laying the foundation and floor for the reservoir.

Week of Feb: 6: Prep work will be completed this week.

Week of Jan. 30: Work will continue on prep work to install the liner.

Week of Jan. 23: Work will begin this week to trench and install the reservoir liner, and continue into next week.

Week of Jan. 16: Under-tank construction is continuing this week.

Week of Jan. 2: Pipe work will continue this week, followed by the installation of encasements to protect the piping.

2022

Week of Dec. 26: Work will be continuing this week on undertank piping.

Week of Dec. 19: On-site construction will continue this week. No work will take place on Dec. 23. 26 and 30.

Week of Dec. 12: The installation of under-tank piping will continue as weather permits, with pipe encasements beginning next week.

Week of Dec. 5: Work will begin this week to install under-tank piping.

Week of Nov. 21: The access road to the site is being demolished this week, and grading and potholing will also continue.

Week of Nov. 14: Interim grading will be done to prepare the site for construction.

Week of Nov. 7: Potholing work will be starting to identify underground utilities. That work is expected to be completed in mid-November.

Week of Oct. 24: Demolition work is being done as a part of the project. There will be no impact on services, which will continue to be provided throughout the duration of the project.

Week of Oct. 10: Construction began this week with the setup of equipment and temporary facilities, and the installation of a construction fence.

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