Stampede is a 1949 American Western directed by Lesley Selander.
Settler John Dawson Steve Clark and his daughter Connie Dawson Gale Storm complain to the local sheriff Johnny Mack Brown but the sheriff claims there is nothing he can do. A love interest develops between Tim McCall and Connie Dawson, while simultaneously the settlers try to dynamite the dam and stampede the McCall cattle.
Source: Wikipedia