South Mayde Creek Channel Conveyance Improvements (C-36,46)

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The “South Mayde Creek Channel Conveyance Improvements and Bypass Channel” (C-36) is made up of two components: (1) a widening and deepening of South Mayde Creek west of the Greenhouse Road bridge, starting at Fry Road; and (2) the construction of a bypass channel on the east side of the Greenhouse Road bridge, extending to Barker Cypress Road.  

The purpose of channel expansion west of the Greenhouse Road bridge is to increase the conveyance capacity of South Mayde Creek. 

The bypass is an additional waterway that will be constructed east of the Greenhouse Road bridge. The purpose of the bypass is to convey the additional flow of stormwater into the Addicks Reservoir during more severe storm events. The existing channel will continue to convey water during normal rainfalls.

HCFCD recognizes there will be a number of challenges to the bypass, and the final configuration has not been determined. Some of the challenges are:

1. The bypass will intersect a channel that flows north-south from Morton Road, 
2. It will also cross Groeschke Road at the trail entrance to Cullen Park .
3. The water volume and velocity when the bypass rejoins South Mayde Creek just before the Barker Cypress Road bridge is uncertain.
4. Sediment will be transferred downstream.  The Corps of Engineers will require sedimentation basins to be constructed. 

The project also includes the construction of two wet bottom detention basins near South Mayde Creek to mitigate the potentially adverse impacts of the channel improvements by temporarily storing excess stormwater - and then slowly draining when channel water levels recede.

It should be underscored that this project is in a preliminary engineering stage, and changes to the design are not unexpected. HCFCD expects to work through the bypass challenges and model alternatives for the next few months. The PER will be completed in the spring of 2020, and properties for the two stormwater detention basins will be acquired. No timeline has been established for the detailed design and construction of the bypass, but detailed engineering for the detention basins is to begin in the summer of 2020. A start date for construction has not been determined.
 

The Harris County Flood Control District will hold a Community Engagement Meeting for the Grand Parkway at Clay Stormwater Detention Basin. The purpose of this meeting is to inform residents about the status of the Grand Parkway at Clay Stormwater Detention Basin and share project information.

The Grand Parkway at Clay Stormwater Detention Basin focuses on providing stormwater detention in support of flood damage reduction in Addicks Reservoir watershed. This project will be paid for with funds from the 2018 Bond Program which were approved by Harris County voters on August 25, 2018. Community engagement is an important component of the Bond Program, and we invite your participation as the program is implemented.

The meeting will begin with a brief presentation to share project updates, followed by a moderated Q&A session with Flood Control District team members. Residents will be able to submit questions and comments throughout the presentation. Any comments not addressed during the Q&A session will receive a response after the event.

A recorded version of the meeting will be available on the Flood Control District’s website and YouTube channel after the event. Meeting accommodations can be made for those with disabilities. If needed, please contact 346-286-4000 at least 48 hours prior to the meeting.

For questions, please contact the Flood Control District at 346-286-4000, or fill out the comment form online at www.hcfcd.org/C48.

Si le gustaría participar en la reunión, pero necesita ayuda en español, comuníquese con el Flood Control District al 346-286-4000.