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Drainage Manual

The MnDOT Drainage Manual is based on the Model Drainage Manual (AASHTO) and provides basic working knowledge of hydrology and hydraulic design so that typical highway drainage features can be designed with minimal assistance.

Note: Tech memos supercede drainage manual information, so check for updates. Questions? Contact Andrea Hendrickson, andrea.hendrickson@state.mn.us.

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MnDOT Drainage Manual Updated
Download entire manual (PDF 28.6 MB) September 2005
Section number and description Updated
Cover Title and Table of Contents (PDF 0.5 MB) September 2005
1 - Introduction (PDF 2 MB) September 2005
2 - Materials and Structural Design (PDF 2 MB) September 2005
3 - Hydrology (PDF 4.3 MB) September 2005
4 - Channels (PDF 3.4 MB) September 2005
5 - Culvert (PDF 2.6 MB) September 2005
6 - Energy Dissipator (PDF 2 MB) September 2005
7 - Storage Facilities (PDF 1.5 MB) September 2005
8 - Storm Drainage Systems (PDF 5 MB) September 2005
Appendices Updated
Appendix A: Risk Assessment (PDF 0.5 MB) September 2005
Appendix B: Rainfall Intensity Curves (PDF 0.5 MB) September 2005
Appendix C: Pipe Flow Design Charts (PDF 1.3 MB) September 2005
Appendix D: Open Channel Flow Charts (PDF 3 MB) September 2005
Appendix E: Computer Programs and Reference Materials (PDF 1 MB) September 2005