Water Projects

Mid-Basin Injection (MBI) Wells – Centennial Park

Santa Ana, CA
$29.5 million
March 2020
Orange County Water District
Tetra Tech
Contractors :
Pacific Hydrotech Corporation (GC) and Best Drilling and Pump, Inc. (Wells)
ASCE 2019 Outstanding Water Treatment Project

Butier Engineering, Inc. is providing constructability review, project coordination, resident engineering, and construction inspection services for the MBI Wells Project located within the City of Santa Ana’s 87-acre Centennial Park. The wells will be used to directly inject 10 MGD of product water from the District’s Groundwater Replenishment System (GWRS) into the principal groundwater aquifer in the central portion of the Orange County groundwater basin. The design and construction requires special consideration of Park impacts. The project requires close coordination with the City of Santa Ana, Santa Ana Unified School District, Heritage Museum, and state and federal agencies. Heritage Museum is a cultural and natural history center bounded by Godinez High School to the north and west and Mitchell Child Development Center to the east. The Museum contains a historic plaza featuring several buildings from the 1890s. The project consists of the following:

  • Construction of four (4) groundwater injection wells in below grade vaults (1,200 feet deep)
  • Construction of two monitoring wells
  • Construction of 5,700 linear feet of purified recycled water injection supply pipeline that connects to the District’s existing GWRS pipeline and crosses the Santa Ana River
  • Construction of 4,200 liner feet of backflush discharge pipeline that discharges to the Greenville-Banning Channel and Centennial Park Lake
  • Installation of submersible pumps within the four injection wells
  • Replacement of 9.6 acres of paving with the Park
  • Demolishing an existing City of Santa Ana restroom facility
  • Construction of two new buildings with shared City of Santa Ana and District uses