Michigan

Michigan Nonpoint Source Best Management Practices Manual

StateDEP / DEQMichiganmediumNeeds reviewCitations verified

This extraction is flagged for quality review.

Compare each cited field to the official PDF before relying on it. What this means

This PDF is Part 1 (introductory/background, 31 pages); individual BMP design specifications are published separately on the MDEQ BMP web page. Pipeline excerpt repair removed 3 unlocated citation(s).

Fields not found in document: design_criteria.required_hydrologic_hydraulic_software, document_metadata.last_revised_date, design_criteria.approved_bmp_categories

Other manuals in Michigan: City of Ann Arbor, City of Detroit, City of Flint, City of Grand Rapids, City of Lansing, Michigan, Wayne County

Document Metadata

Jurisdiction level

State

“Michigan Department of Environmental Quality”
Title Page

State

Michigan

“Michigan Nonpoint Source Best Management Practices Manual”
Title Page

Version / edition

Rev 2017.6.27

“Rev 2017.6.27”
Title Page

Adoption / effective date

2017-06-27

“Rev 2017.6.27”
Title Page

Last revised date

Not found in document

No evidence cited

Relationship to state manual

independent

“BMPs developed specifically for use in Michigan”
Page 11

Design Criteria

Design storm return periods (years)

1-year, 2-year, 5-year, 10-year, 25-year, 50-year, 100-year

“storms of 24-hour duration, with AEPs of 99.9%, 50%, 20%, 10%, 4%, 2%, and 1%; the corresponding average recurrence intervals of these AEPs are one (1), two (2), five (5), 10, 25, 50, and 100 years”
Page 13, Hydrology

Water quality volume method

Treatment of runoff produced by all storm events up to and including the 10 percent exceedance runoff-generating storm event (first flush volume); statewide 10% exceedance precipitation values range from 0.77 to 1.00 inches. A conservative alternative is treatment of 1.0 inches of runoff over the entire site.

“Treatment of runoff produced by all storm events up to and including the 10 percent exceedance runoff-generating storm event... A conservative alternative is treatment of 1.0 inches of runoff over the entire site.”
Page 17, Unified Sizing Criteria

Peak flow calculation method(s)

Presettlement hydrology unified sizing criteria, NOAA Precipitation Frequency Data Server (PFDS)

“The recommended hydrologic baseline condition used in this manual is the presettlement hydrology of the site... Channel Protection – Maintain the calculated presettlement runoff volume and peak flow rate for all storm events up to the 2-year, 24-hour event.”
Pages 13, 17

Hydrologic/hydraulic software

Not found in document

No evidence cited

Approved BMP categories

Not found in document

“practices as either physical/vegetative, or managerial. Some BMPs may not include certain elements, either because the elements don’t apply, or because no reliable information exists for a given practice.”
pp. 27–28