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Code Adoption History for Houston Codes.
Last updated: 11/19/2019
The 2020 version of the Infrastructure Design Manual (IDM)
Last updated: September 10, 2020
The 2019 version of the Infrastructure Design Manual (IDM)
Groundwater Plant Design Guidelines January 2011
Chapter 9.2.01 supplement for design rainfall events, pipe sizes and placement, and inlet
City of Houston Sign Code, effective July 29, 2020