Hi Ken
Call BLM first and ask. If they say it is open then do the research to prove to yourself it is open. If the BLM makes a mistake you do not get your money back they are only doing it as a courtesy but it is easy. Check Platt ;maps in GLO records (General Land Office records) on line. Check both Platt, patents and Historical index records. Then go to the LR2000 and check for other claims as well as Case redecoration reports, ROW's and acreage reports for section you are interested in. Check for information from the Geo-communicator for all possible issues and cross reference information from other reports you find in other areas. This is a good start if anything looks odd then do more research. Many times you have to look up PLO also. To be sure it is a lot of work many people do not look this far. It just depends how sure you want to be. Check land status for wilderness, ACEC sites, historical sites, recreational sites removed from mineral entry and the list goes on and on. Areas can be removed from location for many reasons both permanently and temporary. Just go till you are confident it is good or not good.