9/30/2026
1 RiversideCA.gov
1 SALT AND NUTRIENT MANAGEMENT PLAN
PHASE 3A COST SHARE AGREEMENT
City Council
October 20, 2026
Public Utilities
RiversideCA.gov
2 Salt and Nutrient Management Plans (SNMP)are required to: • Permit and implement various water resource management projects. • Assess the impacts that salt and nitrate have on the long-term sustainability of groundwater supplies. • Analyze long-term effects from newly-constructed water discharge projects on groundwater quality. • In 2021, San Bernardino Valley Municipal Water District, on behalf of the Upper Santa Ana River Watershed Stakeholders, hired WSC and Geoscience Support Services to complete Phases 1 and 2 of the Salt and Nutrient Management Strategy Study.
BACKGROUND
1 2
9/30/2026
2 RiversideCA.gov
3 • Phase 1 (Complete): Ambient Water Quality Characterization. • Phase 2 (Complete): Utilize the Integrated Model to simulate the effects of proposed projects on long-term water quality. • Phase 3A: Leverages the results of SNMP Phase 1 and 2 and combines the efforts of the SNMP Work Group and BH-B Coalition into one comprehensive technical study. • Phase 3B (Future): Defines final strategy for addressing salt and nutrient management in Bunker Hill-B.
BACKGROUND CONT.
RiversideCA.gov
4 SITE MAP
Groundwater Management Zone
Boundaries and AWQ Objectives
3 4
9/30/2026
3 RiversideCA.gov
5 1. February 17, 2026, the San Bernardino Valley Board of Directors approved an amendment to the contract with WSC for Phase 3A cost share agreed to by Parties.
2. Bunker Hill-B Coalition members will pay 50% of the Phase 3A costs, with the remaining 50% equally split among the other six (6) cost sharing Participants from the SNMP work group.
DISCUSSION
RiversideCA.gov
6 COST SHARING BY PARTICIPATING AGENCIES
COST SHARING BY AGENCY Phase 3A TOTAL(%)
Bunker Hill-B Coalition Members (50%) 1. City of Redlands $ 44,107 12.5% 2 East Valley Water District $ 44,107 12.5%
3 San Bernardino Municipal Water Department $ 44,107 12.5% 4 San Bernardino Valley Municipal Water District $ 44,107 12.5% SNMP Work Group Members (50%) 1 City of Colton $ 29,405 8.3% 2 City of Rialto $ 29,405 8.3%
3 City of Riverside Public Utilities $ 29,405 8.3%
4 Western Municipal Water District $ 29,405 8.3%
5 San Bernardino Valley Water Conservation District $ 29,405 8.3% 6 San Gorgonio Pass Water Agency $ 29,405 8.3%
TOTAL $352,859
5 6
9/30/2026
4 RiversideCA.gov
7 1. Ensures that the City of Riverside interests are considered and evaluated in the study
2. Findings and recommended path forward protect the water supplies of the Upper Santa Ana River Watershed into the future.
BENEFITS
RiversideCA.gov
8 That the City Council:
1. Approve the Cost Sharing Agreement between San
Bernardino Valley Municipal Water District and City of
Riverside in an amount not to exceed $29,405.
2. Authorize the City Manager, or designee, to execute the Agreement with San Bernardino Valley Municipal Water
District.
RECOMMENDATIONS
7 8