City of Evansville
Indiana Storm Water Quality Manual (EMC 16.20 / IDEM reference)
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Compare each cited field to the official PDF before relying on it. What this means
Municipality coverage via Indiana Storm Water Quality Manual referenced by Evansville drainage code; local EMC may add site-specific criteria.
Document Metadata
Jurisdiction level
City
No evidence cited
State
Indiana
No evidence cited
Version / edition
October 2007
No evidence cited
Adoption / effective date
2007-10-01
No evidence cited
Last revised date
Not found in document
No evidence cited
Relationship to state manual
adopts state manual directly
“adopts_state_manual_directly — IDEM / Indiana SWQ Manual”
Coverage note
Design Criteria
Design storm return periods (years)
10-year, 100-year
No evidence cited
Water quality volume method
Treat at least one-half inch of storm water runoff (water quality volume or storage) from impervious surfaces, targeting ≥80% TSS removal on an annual average basis; post-development peak discharge rates and volumes should not exceed predevelopment levels (Indiana Storm Water Quality Manual / IDEM).
“Treat at least one-half inch of storm water runoff (water quality volume or storage) from impervious surfaces”
Indiana Storm Water Quality Manual
Peak flow calculation method(s)
Rational Method, NRCS TR-55, NRCS TR-20
No evidence cited
Hydrologic/hydraulic software
Not found in document
No evidence cited
Approved BMP categories
Vegetated Swales, Filter Strip / Filter Ridge, Riparian Buffer Zones, Sand Filters, Pervious Concrete / Porous Asphalt / Porous Pavers, Infiltration Trench / Basin, Bioretention Systems, Dry Extended Detention / Wet Detention, Constructed Storm Water Wetlands, Subsurface Detention/Retention
No evidence cited