Show A Land landmark mrk gone done the granite monument marking the mexican boundary line at tia juana in san diego county was upset et last january by a flood shortly after it was erected by b athe the international boundary commission this elaborate shaft fell into quicksand strenuous efforts were made to recover it the sand was probed for a depth of 25 26 feet but no trace of the lost monument could be found it has been necessary essaU to buy a new site for another monument nox loox IGO feet and erect a second shaft th thereon |