VERT_CS["NAVD88 depth (ftUS)",
    VERT_DATUM["North American Vertical Datum 1988",2005,
        AUTHORITY["EPSG","5103"]],
    UNIT["US survey foot",0.304800609601219,
        AUTHORITY["EPSG","9003"]],
    AXIS["Depth",DOWN],
    AUTHORITY["EPSG","6358"]]