Section 7.60 - Herbert Hoover National Historic Site(a)Snowmobiles. After consideration of existing special situations, i.e., depth of snow, and depending on local weather conditions, the Superintendent may permit the use of snowmobiles on the shoulder of the paved motor road known as Parkside Drive between Main Street of West Branch, Iowa and Interstate Highway 80, which is used by motor vehicle traffic during other seasons in conformance with State law.47 FR 54933, Dec. 7, 1982