Z06207510 USGS H06207510 4500161090329003030009SW10070006134 4000 N06207510 Big Sand Cl at Wy-Mont State Line Y06207510 306207510 19730909 3655 4.75 306207510 19740704 1245 3.59 306207510 19741031 1525 3.81 306207510 19760726 1525 3.75 306207510 19770519 1665 3.88 306207510 19780502 3825 4.81 306207510 19790308 2435 4.30 306207510 19800510 4785 5.13