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The criteria contained in the Manual are generally compatible with the American Association of State Highway Transportation Officials (AASHTO) and the MD This manual provides the design criteria for highway drainage. Hydrologic data for use with the Rational Method and SCS TR55 is included. Design charts and State Highway Administration right-of-way. 1.3 Easements, Ownership and Maintenance. It is the Town's policy to require that all storm drainage facilities, Design guidance is provided for the design of storm drainage systems which collect, convey, and discharge stormwater flowing within and along the highway right-HIGHWAY. DRAINAGE. MANUAL. DECEMBER - 1981. MARYLAND DEPARTMENT OF August 11, 1978 and the "Maryland Interim Watershed Management Policy" of 1977. Criteria in this document apply only to storm drain systems maintained by MCDOT; Maryland State. Highway (MDSHA) and municipalities within Montgomery County For roads not included in the Maryland State Highway Needs Inventory, the correct classfi- cation can be obtained from the S.H.A.'s Bureau of Highway Statistics