Yolo County, California


West Yost Associates


Water source:


Groundwater and Sacramento River

Mr. O'Neill designed a groundwater monitoring, well testing, and data analysis program and performed quantitative analyses for evaluations of aquifer system responses to increased pumping in Eastern Yolo County, California (Conaway Ranch, RD 2035). Work included supervising the drilling and installation of 14 multilevel monitoring wells and the hydraulic testing of 35 irrigation wells. Program also included installation of a subsidence-monitoring network consisting of numerous GPS monuments and an extensometer. Yolo County and California Department of Water Resources requested the monitoring program in relation to the sale of a landowners’ riparian right to Sacramento River water to the State Water Bank.