To The
Genesee County Drain Commissioner
Surface Water Management
Genesee County Drain Commissioner
Surface Water Management

NPDES Phase II- Storm Water Ordinance

The New Construction Standards subcommittee has created a storm water ordinance (dated 2/4/14) and has recommended the accompaniment of the Low Impact Development (LID) Manual. (developed by SEMCOG)

The County Design Standards & Requirements (2019) are the new design standards adopted by the Drain Office. these standards reference the LID manual for BMP's to help meet the water quality requirements. NOTE: as a community you only need to adopt requirements A, B, D and E to meet NPDES ph II requirements. Requirement C is the GCDC-SWM flood control requirements.

Entire Manual

Low Impact Development Manual for Michigan: (PDF, 21.27 MB)

Manual Chapters

: Manual Introduction (PDF,6.0 MB)
Chapter 1: Introduction to LID (PDF, 877 KB)
Chapter 2: Stormwater Management in Michigan: Why LID? (PDF, 964 KB)
Chapter 3: LID in Michigan: The Key Determinants (PDF,2.5 MB)
Chapter 4: Integrating LID at the Community Level (PDF,1.2 MB)
Chapter 5: Incorporating LID into the Site Design Process (PDF, 526 KB)
Chapter 6: Nonstructural Best Management Practices (PDF, 2.2 MB)
Chapter 7: Structural Best Management Practices (PDF,7.8 MB)
Chapter 8: Implementing LID in Special Areas (PDF,1.4 MB)
Chapter 9: Calculations and Methodology (PDF,1.4 MB)
Chapter 10: Michigan LID Case Studies (PDF, 865 KB)
Appendix A: Statewide LID Committee (PDF,32 KB)
Appendix B: Glossary and List of Acronyms (PDF, 350 KB)
Appendix C: Recommended Plant Lists for Best Management Practices (PDF,1.5 MB)
Appendix D: Recommended Materials (PDF, 361 KB)
Appendix E: Soil Infiltration Testing Protocol (PDF, 412 KB)
Appendix F: Maintenance Inspection Checklists (PDF, 357 KB)
Appendix G: Stormwater Management Practices Maintenance Agreements (PDF, 618 KB)
Appendix H: Model Ordinances (PDF,1.6 MB)