project description
This feasibility study investigated flooding along the
Wallisville Outfall Channel, formally identified as HCFCD Unit H103-00-00, to
identify potential solutions. The study was completed in May 2023. The
Wallisville Outfall Channel is mainly an open, grass-lined channel that starts
near the intersection of North Wayside Drive and Wallisville Road. The channel
drains eastward and ultimately outfalls into Hunting Bayou just north of IH-10.
The channel and its tributaries service approximately
4.5 square miles of the H103-00-00 area located within the City of Houston and
a small area of Jacinto City. The secondary drainage system that drains to the
Wallisville Outfall Channel consists of multiple roadside ditches and storm
sewer networks owned and maintained by the City of Houston. Historically,
flooding of structures and roadways is frequent in the project area.
The feasibility study identified the primary factors
causing historical flooding in the Hunting Bayou watershed, including the
limited conveyance capacity of the main Wallisville Outfall channel and
inadequacies in the drainage system. This analysis identified four areas
subject to frequent flooding: the Denver Harbor neighborhood, the Gellhorn
Drive industrial area, the lower Hunting Bayou area and the City of San Jacinto
City. The study then recommended two potential alternatives to reduce
structural and roadway flooding using the available $10 million in funds
through the 2018 Bond Program.
The recommended project will provide significant
benefits by reducing frequent flooding in the Denver Harbor neighborhood. In
addition, the recommended improvements include construction of a stormwater
detention basin, construction of a new open channel and changes to local
drainage systems to increase their capacity. This will result in more efficient
local storm-sewer drainage systems in the City of Houston.
The study also recommended the construction of a stormwater
detention basin and channel conveyance improvements in the Gellhorn Drive
industrial area.
The project will next move
into the Preliminary Engineering stage of the overall project lifecycle under
Bond ID F-17 (for additional information visit F-17). The project will be
coordinated with existing City of Houston plans. To view a summary of the
feasibility study click here.