2024 Drainage Manual
MnDOT is transitioning from the current Drainage Manual (previously published in 2000) to its successor manual. During this transition, both publications will be active and online, however the 2024 updates will supersede the 2000 version of the Drainage Manual. You may navigate between publications using the link below.
Access the 2000 publication of the Drainage Manual.
Note: As updates of the Drainage Manual are published, the corresponding material from the previous version of the manual will be removed. Both this page and the previous drainage manual page have links where you can sign up for email update notices about the manuals.
Manual and Appendices
| Document | Date updated | Transmittal |
|---|---|---|
| Download entire manual | TBD | TBD |
| Cover Title and Table of Contents | TBD | TBD |
| Chapter 1 - Introduction | 06/24/2024 | 24-01 |
| Chapter 2 - Pipe Materials | 06/24/2024 | 24-01 |
| Chapter 3 - Hydrology | 06/24/2024 | 24-01 |
| Chapter 4 – Channels and Ditches | TBD | TBD |
| Chapter 5 - Culverts | TBD | TBD |
| Chapter 6 – Energy Dissipator | TBD | TBD |
| Chapter 7 – Storage Facilities | TBD | TBD |
| Chapter 8 – Storm Drainage Systems | TBD | TBD |
| Chapter 9 – Bridges | TBD | TBD |
| Appendix A – Risk Assessment | TBD | TBD |
| Appendix B - Atlas 14 24-hour Precipitation Depth by County | 06/24/2024 | 24-01 |
| Appendix C - Steel Pipe Service Life Maps | 06/24/2024 | 24-01 |
| Appendix D - Hard Conversions of Pipe Diameters | 06/24/2024 | 24-01 |
| Appendix E – Computer Programs and References | TBD | TBD |
| Appendix F – Glossary and Acronyms | TBD | TBD |
Supporting Documents
| Document | Date updated | Transmittal |
|---|---|---|
| Risk Assessment Letter Template (fillable PDF) | TBD | TBD |
| Risk Assessment Spreadsheet Tool (.xls) | TBD | TBD |
| Culvert Design Form (.xls) | TBD | TBD |
Historical Documents
| Document | Date updated | Transmittal |
|---|---|---|
| ">Historic Drainage Manual (ca. 2000) | Aug. 30, 2000 | 00-01 |