The purpose of this study, conducted by James M. Montgomery, Consulting Engineers, Inc., was to review and update the 1977 Ultrasystems Inc. socio-economic evaluation of the Chino Basin groundwater adjudication judgment. This review, which was called for in the original judgment, discussed the historical and the projected water demands and costs. It evaluated at length the costs of the physical solution imposed by the judgment, with the focus of the study being the Watermaster charges to the Appropriative Pool members, and the financial impacts of changing the replenishment assessment of the physical solution.
The report, prepared by David L. Sunding, Ph.D., measured the economic costs and benefits of achieving hydraulic control through re-operation of the Chino Basin. Various scenarios were considered in the analysis, with scenarios chosen to reflect uncertainty regarding future values of water, the time path of annual overdrafts selected to dewater the basin, and the use of the resulting induced inflow from the Santa Ana River.
This report, prepared by David L. Sunding, Ph.D., measured the costs and benefits to various Chino Basin agencies of the program elements encompassed by the Peace I and Peace II Agreements. Both agreements are considered relative to a baseline state of the world existing after the Judgment but prior to the Peace Agreement. The analysis examined net returns to the ten largest agencies that hold groundwater rights in the Basin over the time period 2007 to 2030. Together, these agencies account for over 91 percent of Basin safe operating yield.