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Drainage Manual

The MnDOT Drainage Manual contains design criteria and basic working knowledge of hydrology and hydraulic design for use in the design and evaluation of highway drainage features. Contact Andrea Hendrickson, andrea.hendrickson@state.mn.us, with questions about the manual.

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MnDOT Drainage Manual Date updated
Download entire manual (PDF 28.6 MB) August 30, 2000
Sections Date 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 Dissipater (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 Date 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
Commonly used Tech Memos related to MnDOT Drainage Manual Date issued
17-05-B-02 Use of Plastic Pipe for Storm Sewer and Culverts on Trunk Highways (PDF 0.5 MB) April 11, 2017
16-05-B-02 Storm Drain Design Frequency and Catch Basin Spacing (PDF 0.5 MB) Sept. 13, 2016
15-10-B-02 Use of Atlas 14 Volume 8 Precipitation Frequency Estimates (PDF 0.5 MB) Dec. 8, 2015
15-03-TS-01 Design Guidance for Locating Wet Ponds with Permanent Water Depths along Freeways and High Speed Highways(PDF 0.5 MB) March 25, 2015
14-06-ENV-01 Storm Water Infiltration System location guidelines for MnDOT ROW(PDF 0.5 MB) July 9, 2014
Complete Tech Memos list (link)