# # National Water Information System # 2024/11/21 # # # Date Retrieved: USGS Water Data for the Nation Help System # gw_ref_cd gw_ref_ds 10s 48s NAD27 North American Datum of 1927 NAD83 North American Datum of 1983 OLDAK Old Alaska (Mainland) and Aleutian Island Datum OLDAK Old Alaska (Mainland) and Aleutian Islands Datum OLDGUAM Old Guam Datum OLDHI Old Hawaiian Datum OLDPR Old Puerto Rico and Virgin Island Datum OLDPR Old Puerto Rico and Virgin Islands Datum OLDSAMOA Old American Samoa Datum PUERTORICO Puerto Rico & Virgin Islands WGS72 World Datum 1972 WGS84 World Datum 1984