The Wellsville Founders Monument mentions the fort:
This monument erected in honor of these pioneer men and their families who on September 15, 1856 founded the first white settlement in Cache Valley then known as Maughan’s Fort now known as Wellsville, Utah

DUP Marker #550 “Original Settlement of Smithfield” says:
In June, a horseman brought word that the families should return to Peter Maughn’s Fort, located at Wellsville, because of the threatening activities by the Indians.

Related:

• Pioneer Forts