F-41 Channel Conveyance Improvements along Clawson Ditch Q122-00-00

F-41 Channel Conveyance Improvements along Clawson Ditch Q122-00-00

Recent Action

December 15, 2020 - Harris County Commissioners Court authorized $1,050,017 for engineering services for a preliminary engineering study for Unit Q122-00-00.

August 25, 2020 – Harris County Commissioners Court authorized the Flood Control District to negotiate an agreement for engineering services for an advanced alternatives analysis and preliminary engineering study in support of this project.

April 7, 2020 – Harris County Commissioners Court authorized to purchase one tract of land to support this project

September 24, 2019 – Harris County Commissioners Court authorized and initiated this project.

Project Description

This project study team will analyze flooding occurring near Clawson Ditch, formally identified as Harris County Flood Control District (HCFCD) Unit Q122-00-00 and will recommend projects to reduce flooding risks.


Q122-00-00, also known as Clawson Ditch, is a tributary to Cedar Bayou watershed near the northeastern corner of Harris County, east of US 90 and bisected by Farm-to-Market (FM)1942.


This project is currently undergoing the Preliminary Engineering Report (PER) stage and conceptual design stage. This effort will result in more detailed recommendations for flood damage reduction projects and an implementation strategy for those projects.

Bond Project Listing

Bond Project F-41 is a “Local Only” project, which means there is no funding partner identified at this time, and the project will be funded entirely from the 2018 Bond Program. The Bond Project List includes an allocation for this project of $19 million.

Q122 Study

The Harris County Flood Control District (HCFCD) completed the Cedar Bayou Flood Risk Reduction Study (FRRS), which was funded as part of the 2018 Bond program. This study focused on evaluating long-term flood risk reduction strategies for the watershed while outlining improvements that could provide benefits in the short term.

A long-term proposed solution identified by the study is a large regional detention pond, approximately 155 acres in size and providing approximately 335 million gallons of storage volume. Additionally, channel improvements to widen and deepen Q122-00-00 upstream were identified as a long-term proposed solution. For short-term improvements the study recommends acquisition of right-of-way for future improvements, the initial construction of the regional stormwater detention basins, and implementing the long-term proposed solutions.

The long-term proposed solutions would be phased as funding becomes available with the estimated total cost for the ultimate solution equal to roughly $31.5 million.

The project benefits include more effective channel conveyance to contain future 100-year flows and removal of inundation of up to 35 structures in the 100-year event. The project benefits also include the removal of inundation by approximately 80% in the 100-year event and an estimated reduction of $2.2 million in damages.