2019-04-052019-04-05FHWA-OKOklahoma Department of Transportation State Planning and Researchhttps://hdl.handle.net/11244/317850Over $4 million are spent each year for erosion control on Oklahoma highways and roads. The cost per mile for erosion control increased approximately 45 percent from 1965 to 1966. With more than 12,000 miles of federal and state highways in Oklahoma now, and more being constructed each year, the need for determining the causes of soil erosion and the most satisfactory and economical methods for control becomes obvious.24 pages3,251,584 bytesapplication.pdfTechnical Report