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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) August 30, 2000
Section number and description Updated
Cover Title and Table of Contents (PDF 0.5 MB) August 30, 2000
1 - Introduction (PDF 2 MB) August 30, 2000
2 - Materials and Structural Design (PDF 2 MB) August 30, 2000
3 - Hydrology (PDF 4.3 MB) August 30, 2000
4 - Channels (PDF 3.4 MB) August 30, 2000
5 - Culvert (PDF 2.6 MB) August 30, 2000
6 - Energy Dissipator (PDF 2 MB) August 30, 2000
7 - Storage Facilities (PDF 1.5 MB) August 30, 2000
8 - Storm Drainage Systems (PDF 5 MB) August 30, 2000
Appendices Updated
Appendix A: Risk Assessment (PDF 0.5 MB) August 30, 2000
Appendix B: Rainfall Intensity Curves (PDF 0.5 MB) August 30, 2000
Appendix C: Pipe Flow Design Charts (PDF 1.3 MB) August 30, 2000
Appendix D: Open Channel Flow Charts (PDF 3 MB) August 30, 2000
Appendix E: Computer Programs and Reference Materials (PDF 1 MB) August 30, 2000