Report: Investigation North Okanagan Water Requirements, Groundwater Studies
From EcoCat's description of the Investigation:
"Results of regional study carried out in 1959 of groundwater conditions in the North Okanagan. Includes summary of problem, area groundwater descriptions, well records, longitudinal cross-section and maps ; Department of Mines, 14 pages, NTS Map 082L06"
See the Investigation [PDF]. Note: scanned copy of original document.