Stormwater Atlas

Milwaukee Metropolitan Sewerage District

Chapter 13 Surface Water and Stormwater

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Open source PDF ↗Official agency page ↗

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

MMSD Ch 13 Jul 2020 regional criteria covering Milwaukee metro. Pipeline excerpt repair removed 4 unlocated citation(s).

Fields not found in document: document_metadata.adoption_or_effective_date, design_criteria.required_hydrologic_hydraulic_software, document_metadata.state_code, document_metadata.version_or_edition, document_metadata.last_revised_date, design_criteria.peak_flow_calculation_method
Other manuals in Wisconsin: City of Madison, Wisconsin, Wisconsin Department of Natural Resources

Document Metadata

Jurisdiction level
Special District

“Metropolitan Sewerage District”

Chapter 13

State
Not found in document

No evidence cited

Version / edition
Not found in document

No evidence cited

Adoption / effective date
Not found in document

No evidence cited

Last revised date
Not found in document

No evidence cited

Relationship to state manual
independent

“unit that is violating this chapter. This action may include: stopping work on facilities under construction; stopping the design of facilities recommended by a facilities plan; deferring planning for sewerage system capacity expansion or relief; or placing a moratori”

p. 5

Design Criteria

Design storm return periods (years)
2-year, 100-year

“outflow during the 1% probability (100-year) storm that is no more than 0.5 cubic feet per second multiplied by the area of the site in acres and a post-development peak outflow during the 50% probability (2-year) storm event that is no more than 0.15 cubic feet per second m”

p. 11

Water quality volume method
Green infrastructure detention: 0.5 inch × net new impervious for sites 5,000 sf to ½ acre (MMSD Ch 13). Larger sites follow peak/volume match release criteria.

“will add one-half acre or more of impervious surface, then a site development stormwater runoff management plan shall achieve either the allowable runoff release rate or the allowable runoff volume. (b) Requirement for redevelopment disturbing two acres or more If redevelop”

p. 12

Peak flow calculation method(s)
Not found in document

No evidence cited

Hydrologic/hydraulic software
Not found in document

No evidence cited

Approved BMP categories
Green infrastructure, Detention, Volume control practices

“green infrastructure / detention”

Chapter 13