Page 173 - Yucaipa Sustainable Groundwater Management Agency - Yucaipa SGMA

Relevant Experience: Salt and Nutrient Management Plan
 Basin‐wide, regulatory‐driven Mojave Water Agency, San Bernardino County
management plan
Mojave Water Agency (MWA) retained Todd Groundwater to
 Comprehensive data review and
hydrogeologic characterization prepare a Salt and Nutrient Management Plan (SNMP) for its
service area, which overlies portions or all of 36 local
 Preparation of SNMP document
groundwater basins and is governed in part by two completed
2
 Development of comprehensive adjudications. The MWA encompasses over 16,000 mi of
groundwater monitoring program urban areas, rural communities, and farmland; sources of
 Stakeholder outreach water supply include SWP water, local groundwater, and
recycled water. The MWA service area also is governed by the
Active Dates: 2013‐2015
two Regional Water Quality Control Boards.
Budget: $179,000
Similar to the GSP process, the development of an SNMP is
Reference: guided by State law (Recycled Water Policy), must satisfy
Mr. Lance Eckhart detailed technical requirements, and is intended to be a local
Director of Basin Management and stakeholder‐driven process. The Mojave SNMP required
Resource Planning development of a conceptual hydrogeologic model and
Mojave Water Agency estimates of water budgets and salt and nutrient (S/N) loading
760.946.7015 analysis for 22 analysis subregions using a dynamic water
leckhart@MojaveWater.org quality mixing model incorporating existing USGS MODFLOW
Key Staff: model outputs; an anti‐degradation analysis; evaluation of
future water quality conditions considering population
Edwin Lin, Phyllis Stanin
growth, recycled water projects, and local implementation
measures and plans; and development/documentation of a
groundwater and surface water quality monitoring program.
To facilitate stakeholder engagement and public outreach, the Mojave SNMP was folded into the Mojave
Water Agency Integrated Regional Water Management (IRWM) planning process. The stakeholder group
included 58 water purveyors, several County agencies, 14 state/federal agencies, and over 30 local
community interest groups. Separate public workshops and meetings with disadvantaged communities
and tribes were held. Several workshops were held with Lahontan and Colorado Regional Board staff to
discuss SNMP data collection efforts, analysis methodologies, findings, and the Regional Boards’ approach
to SNMP adoption.

The SNMP revealed that SWP recharge water improves 2008‐13 TDS Concentrations
and/or stabilizes groundwater quality with respect to
S/Ns, and that planned recycled water projects would not
exceed the available assimilative capacity in any local
subregions. The existing monitoring program was
deemed adequate to track constituents of concern
relative to water quality objectives.
Phyllis Stanin served as Project Manager, and was
supported by Edwin Lin, who led the hydrogeologic and
groundwater quality characterization and S/N loading
analysis, including the model assessment. Both Edwin
Lin and Phyllis Stanin participated in the stakeholder
outreach process.

TODD GROUNDWATER

Yucaipa Sustainable Groundwater Management Agency - August 9, 2018 - Page 170 of 208