Owen-Joyce, S.J., Wilson, R.P., Capenter, M.C., and Fink, J.B., 2000, Method to identify wells that yield water that will be replaced by water from the Colorado River downstream from Laguna Dam in Arizona and California: U.S. Geological Survey Water-Resources Investigations Report 00-4085, 31 p., 3 sheets, scale 1:100,000