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Current Groundwater Plant Design Guidelines

Current groundwater plant design guidelines (effective Oct. 1, 2021)

Last updated: July 1, 2021

IDM Chapter 9 storm detention cover letter

Cover letter explaining the supplemental changes made to Chapter 9 of the Infrastructure Design Manual.

 

Last updated: January 26, 2021

Harris County Records Memo

Memo for restrict flood bond projects to municipalities.

Request For Acknowledgment Of Easement Reverter

Request For Acknowledgment Of Easement Reverter.
This document maintained by the Joint Referral Committee.

Historical Groundwater Plant Design Guidelines

Historical groundwater plant design guidelines

Last updated: Jan. 2011

Easement Reverter Guidelines

Easement Reverter Guidelines.
This document maintained by the Joint Referral Committee.

Easement Reverter Flowchart

Easement Reverter Flowchart. 
This document maintained by the Joint Referral Committee.

2022 IDM Cover Letter and Executive Summary

Executive summary and cover letter for the 2022 edition of the Infrastructure Design Manual

 

Last updated: July 1, 2022

IDM Chapter 9 Storm Detention Supplement

This supplement modifies storm detention requirements in Chapter 9 of the Infrastructure Design Manual (IDM).

 

Last updated: March 17, 2021

IDM Chapter 9.2.01 Supplement

Chapter 9.2.01 supplement for design rainfall events, pipe sizes and placement, and inlet