City of Portland
Maine Stormwater Management Design Manual, Volume III
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Compare each cited field to the official PDF before relying on it. What this means
Municipality coverage via Maine Vol III (Augusta pattern).
Document Metadata
Jurisdiction level
City
No evidence cited
State
Maine
No evidence cited
Version / edition
May 2016
No evidence cited
Adoption / effective date
Not found in document
No evidence cited
Last revised date
2016-05-01
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, 10-year, 25-year
No evidence cited
Water quality volume method
Treat the first 1 inch of runoff from impervious surfaces and 0.4 inch from landscaped areas.
No evidence cited
Peak flow calculation method(s)
Rational Method, SCS TR-20, SCS TR-55
No evidence cited
Hydrologic/hydraulic software
TR-20, TR-55
No evidence cited
Approved BMP categories
Detention Basins, Wet Ponds, Vegetated Buffers, Infiltration / Filtration BMPs, LID Practices
No evidence cited