City of Akron

Rainwater and Land Development — Ohio's Standards for Stormwater Management (city MS4)

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

Statewide Ohio manual used as MS4 post-construction reference when city PDF unavailable/empty.

Other manuals in Ohio: City of Cincinnati, City of Cleveland, City of Columbus, City of Dayton, City of Toledo, City of Youngstown, Ohio, Ohio Department of Transportation (ODOT)

Document Metadata

Jurisdiction level

City

No evidence cited

State

Ohio

No evidence cited

Version / edition

Third Edition 2006

No evidence cited

Adoption / effective date

2006-12-01

No evidence cited

Last revised date

Not found in document

No evidence cited

Relationship to state manual

adopts state manual directly

No evidence cited

Design Criteria

Design storm return periods (years)

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

No evidence cited

Water quality volume method

WQv (ac-ft) = C × 0.75 × A / 12 (treat runoff from 0.75 inch of precipitation); Ohio EPA NPDES requires 20% additional WQv for sediment; extended detention drawdown 24–48 hours. Used where no durable city design-manual PDF was found (or prior extract was empty/scanned).

“for construction activities. WQv (ac-ft) = C * 0.7 * A / 2 (Equation ) Where: C = runoff coefficient A = area draining into the BMP in acres The runoff coefficient, C, is calculated using the following equation or alternatively values provided in the current Ohio EPA NP”
p. 37

Peak flow calculation method(s)

NRCS TR-55, USGS empirical equations for small urban streams in Ohio, Manning's Equation

No evidence cited

Hydrologic/hydraulic software

Not found in document

No evidence cited

Approved BMP categories

Water Quality Ponds, Infiltration / Filtration practices, LID / Conservation Development, Wetland / Stream setbacks

No evidence cited