Conveyance Improvements on Armand Bayou

Conveyance Improvements on Armand Bayou

Last Modified: 08/23/2020 05:18 AM

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Recent Actions

September 15, 2020 – Harris County Commissioners Court authorized an agreement with Harris County Toll Road Authority in support of this project.

July 28, 2020 – Harris County Commissioners Court awarded $4,985,763 for widening and deepening of Armand Bayou for the Flood Control District in support of this project (subject to applicable bonds to be received).

March 24, 2020 – Harris County Commissioners Court authorized negotiations for materials engineering and testing services in support of this project.

October 8, 2019 – Harris County Commissioners Court authorized an additional $281,510 for design, bidding and construction stage engineering services in support of this project 

August 2, 2017 – Harris County Commissioners Court accepted a Preliminary Engineering Report in support of this project. 

July 11, 2017 – Harris County Commissioners Court approved an $871,741 agreement with an engineering firm to provide design, bidding and construction phase engineering services in support of this project. 

September 13, 2016 – Harris County Commissioners Court approved an agreement with the Harris County Toll Road Authority in support of this project.

Project Description

Construction will begin in 2020 on a project to widen and deepen a segment of Armand Bayou from Sam Houston Tollway East to Spencer Highway. The Harris County Flood Control District is working with the Harris County Toll Road Authority on the project, in connection with a HCTRA project to expand the toll road.

HCTRA will fund the channel project, which is being managed by the Flood Control District.

Channel improvements along this 2,300-foot section of Armand Bayou will mitigate for increased stormwater flows as a result of the road project. The new design will deepen and widen the channel to allow for storm sewer outfall from HCTRA’s tollway widening.

The current V-shaped channel has an average depth of about 6 feet, with a bank-to-bank channel width that varies between 20 feet and 30 feet.

The proposed channel will have a trapezoidal (flat-bottom) cross-section, with an average depth of 8 feet and a bottom width of 61 feet. The bank-to-bank channel width is as much as 122 feet.

Property along the channel was acquired to widen the current 30-foot channel corridor to a maximum of 182 feet, including maintenance berms that will allow for future routine maintenance access.

Natural stable channel design features of the new channel will improve its environmental value, while also working to stabilize the slopes. These environmentally friendly features include using natural root balls to armor the “toe” of the bayou banks, and using a series of pools and rock riffles to slow the water and reduce erosion. This new reach of Armand Bayou will have room to meander more naturally within the channel corridor.

Public Meeting

A Public Meeting for this project was held on February 12, 2020.