2025 Groundwater Allocation: Tule Subbasin Sustainable Yield: 1.11 AF/acre (sustainable long-term allocation) Precipitation Yield: Variable based on annual precipitation from 1991 average District Allocated Groundwater Credits: Variable annually based on recharge activities and canal losses Phase 1 Transitional Allocation (2025-2029): 0.75 AF/acre/year Total estimated allocation: ~2.61 AF/acre/year (1.86 AF sustainable + precipitation + District allocations + 0.75 AF transitional) Transitional Water Fee (2025): $125.73/AF maximum Exceedance Fee: $810.84/AF maximum Base Fee: $1.27/AF maximum The GSA uses a phased approach where transitional allocations decrease over time: Phase 1 (2025-2029): 0.75 AF/acre/year Phase 2 (2030-2034): 0.50 AF/acre/year Phase 3 (2035-2039): 0.25 AF/acre/year Water consumption is measured using satellite evapotranspiration data minus surface water deliveries to calculate net groundwater use. The system includes landowner groundwater banking credits for surface water recharge and over-irrigation. Allocations are reviewed annually by the board based on monitoring data and sustainability goals. Transitional allocations may be adjusted if sustainability objectives are not being met.
