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Design Manual Using the Rational Method to Chapter 4 ...
Design Manual Chapter 4 Drainage . Originally Issued: 09-01-95 Revised: 07-02-15 . ... same downstream location as the underground storm sewer pipe? • Are there known or expected roof drains, tile drains, subdrains, sump pumps, or other items that ... frequency, design flood frequency, storm frequency, recurrence frequency, exceedence ...
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