# # National Water Information System # 2024/12/12 # # # Date Retrieved: USGS Water Data for the Nation Help System # Code Description 1s 85s A "Reported by another government agency (do not use ""A"" if reported by owner, use ""O"")." D From driller's log or report. G Private geologist-consultant or university associate. L Depth interpreted from geophysical logs by personnel of source agency. M Memory (owner, operator, driller). O Reported by owner of well. R Reported by person other than the owner, driller, or another government agency. S Measured by personnel of reporting agency. U Source is unknown. Z Other source (explain in remarks).