00431
HISTORY
H9861/79-80--OPR-J236; LARGE SUNKEN CLUMP OF CONCRETE, COVERED 1 FOOT;        
 DEL NORTE RANGE/RANGE CONTROL, CHAIN SWEEP; THE DEL NORTE POSITION           
 (29-52-03.03N, 89-40-29.87W) WAS REFINED AT VERIFICATION TO 29-52-04.30N,