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An independent project organizing public records from the City of Nowthen, Minnesota. Not an official city site. Documents and votes are sourced from cityofnowthen.gov; interpretations are AI-extracted and may need correction.

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Definition of 10% storm event for stormwater design.

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Date range

2019-01-08 — 2019-01-08

Every document that mentions this number (1)

Meeting City Council Work Session — Agenda Packet (2019-01-08)Jan 8, 2019p.3raw: 4.21" of rainfall over a 24- hour period
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Definition of 10% storm event for stormwater design.
b. New storm sewer systems shall be designed to accommodate discharge rates with a 10% chance of occurrence. The 10% storm event is defined as having an MSE 3 MN distribution of 4.21" of rainfall over a 24- hour period (based on NOAA 14 data) for Anoka County.
Reasoning: This is a quantifiable rainfall rate, not a dollar, but is a required figure for compliance.