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:
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.
In February 2021, Commissioners Court approved the Preliminary Engineering Report, “Lower South Mayde Creek (U101-00-00) Bypass Channel and Channel Improvements” (September 2020), and authorized the Flood Control District to proceed with detailed engineering plans.
The recommendations of the Halff PER were:
Short term – fully benched channel conveyance improvements between Fry Road and Greenhouse Road, construction of 2 detention basins (one at the water-filled Katy “Cliffs” at Morton Road, the other at Sprint Sand & Clay’s excavation operation at Fry Road and Franz Road).
Long-term – a bypass to the natural flow of South Mayde Creek on the east side of the Greenhouse Road bridge, plus a sedimentation basin just west of Westlake MUD No. 1’s sewage treatment facility.
Replacing the Greenhouse Road bridge was evaluated but was not believed to produce incremental benefits to the channel conveyance improvements and introduced adverse downstream impacts.
Only 10% of the total project cost is to be funded by the bonds authorized by Harris County voters in 2018. The remaining 90% is to be funded by federal or state "partners". To date, HCFCD has not received such funding.
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.
The Virtual Community Engagement Meeting will be held on:
THURSDAY, JUNE 24, 2021
6:30 P.M. – 7:30 P.M.
Join online at: PublicInput.com/GPClay
Or by phone* at 855-925-2801 with Meeting Code: 2287 .
The Addicks De-Silt Program consists of multiple comprehensive projects to evaluate and de-silt channels for which the District has property rights that drain directly to the Addicks reservoir. In addition, this program will repair impacts, and develop construction and maintenance plans, in coordination with the U.S. Army Corps of Engineers as appropriate.
The goal of this program is to make sure these channels are functioning at design capacity as they carry stormwater out of surrounding neighborhoods and into the federal reservoir. Rainfall within the 138-square-mile Addicks Reservoir watershed drains along 159 miles of open waterways, including Langham Creek (U100-00-00), South Mayde Creek (U101-00-00), Bear Creek (U102-00-00), Horsepen Creek (U106-00-00), and its tributaries. As a part of the Flood Control District’s overall maintenance operations, this program follows the Tax Day 2016 and Hurricane Harvey storms, which sent record levels of sediment-laden stormwater through the channels leading into the reservoir, and caused severe erosion in some areas.
To learn more about this project and other Flood Control District eﬀorts in the area, please visit www.hcfcd.org/F53.
July 20, 2020 - HCFCD reports that the District has removed over 100,000 cubic yards of silt, sediment, and debris. The largest volume removed was in Langham Creek, with 64,579 tons removed, followed by South Mayde Creek with 32,298 tons (or 3,200 dump trucks) removed. Crews are continuing work on this construction project to remove silt and debris from these 2 creeks, plus Bear Creek and Horsepen Creek to help return these waterways to their original design capacity.
October 3, 2019 - HCFCD held a community engagement meeting is to discuss the rehabilitation of channels upstream of Addicks Reservoir.
Desilting Project - Pilot Project (Completed) and There Packages to be Completed
Harris County Engineering consultant Pape‐Dawson Engineers, LLC. presented recommended drainage improvements for the Bridgewater Village and Enclave at Bridgewater subdivisions on October 8, 2019 at Loraine T. Golbow Elementary School.
Recommended improvements for the Bridgewater Village and Enclave at Bridgewater subdivisions include a regional wet‐bottom stormwater detention basin to the north of Clay Road and east of Grand Parkway to provide more storage capacity. In addition to the basin, a berm along Clay Road is also proposed to provide further mitigation.