Document Type


Publication Date

January 1977


Foreword: This report is composed of thee volumes; Volume I is the Research Report; Volume II consists of recommendations for establishing design manuals and Appendices B, C, D, E, F, G, and H, which are the design aids required for establishing design manuals; Volume III consists of Appendix A, and accumulation of the data base used in the study, FHWA chose to arrange the report as described to facilitate distribution of the results. The methods reported herein are designated as the Federal Highway Administration Methods are designed to be applied to watersheds smaller than 50 square miles but may be used on areas up to 100 square miles in size. This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. Sufficient copies of Volumes I and II will be distributed to provide a minimum of one copy to each FHWA Regional office, FHWA Dibision office and State Highway Agency. Volume III will be distributed only upon special requirest since it will be of interest primarily to individuals wishing to verify equations of develop new questions. Direct distribution is being made to the Division offices.