Ill. Admin. Code tit. 35 § 501.390

Current through Register Vol. 48, No. 50, December 13, 2024

Section 501.390 - 25-Year, 24-Hour Precipitation Event

The maximum 24-hour precipitation event with a probable recurrence interval of once in 25 years, as defined by NOAA Atlas 14; Precipitation Frequency Atlas of the United States, incorporated by reference in Section 501.200.

Ill. Admin. Code tit. 35, § 501.390

Added at 38 Ill. Reg. 17661, effective 8/11/2014