Kennesaw Mountain National Battlefield Park Boundary Adjustment Act This bill modifies the boundary of the Kennesaw Mountain National Battlefield Park in Georgia to include approximately eight acres identified as Wallis House and Harriston Hill. The Department of the Interior may acquire land or interests, by donation or exchange, from willing sellers only. The written consent of property owners is required before the land is included in the park. Interior may not acquire the land by condemnation.