The main reserve of the Rolling River First Nation lied within the east-central portion of the RM. The RM was named for David Howard Harrison who became premier of Manitoba in 1887.
The main reserve of the Rolling River First Nation lies within the rectangle of the RM, in its east-central portion, although the two are separate governmental entities. The R.M. was incorporated in 1883 and named for David Howard Harrison who became premier of Manitoba in 1887.