To Provide for Federal Assistance in the Planning and Installation of Works and Measures for the Control and Prevention of Damages Resulting from Erosion of the Roadbeds and Rights-of-Way of Existing State, County, and Other Rural Roads and Highways, From Erosion of the Banks and Rivers and Streams, and From Erosion of Unrestored or Unrehabilitated Surface or Strip Mined Non-Federal Lands; To Authorize the Secretary of Agriculture To Cooperate with States, Counties, and Local Public Agencies in the Planning and Installation of Works and Measures To Control or Prevent Erosion Damages to the Roadbeds and Rights-of-Way of Existing State and County Roads and Highways.