Harris County Flood Control District (HCFCD) will soon start building the new Mercer Stormwater Detention Basin, a large flood-risk reduction project along Cypress Creek adjacent to Mercer Botanical Gardens. HCFCD issued a notice to proceed to the contractor in December 2023 and the contractor is now mobilizing.
Combined 512 Acre Feet in Two Basins
The Mercer Stormwater Detention Basin project will include the excavation of 512 acre-feet of soil and other materials from the site. Once complete, the $14.8 million dry-bottom stormwater detention basin will provide approximately 166.8 million gallons of stormwater storage during heavy rainfall events.
The U.S. Department of Housing and Urban Development’s Community Development Block Grant Disaster Recovery program provided a $15.4 million grant for the project. Another $9.7 million comes from the 2018 Bond Program.
Arrowstone Contracting, LLC received a $14,846,391 contract for construction. Land acquisition, engineering and administration will consume the rest of the budget.
The stormwater detention basin will include two separate compartments, north and south, with an equalizer pipe connecting them. An 54″ outfall pipe will also be constructed along the north compartment so stormwater can slowly flow back into Cypress Creek after storms pass.
Contractors will access the work area via FM-1960 or Lazy Ravine Lane in the Memorial Hills Subdivision. The contractor may use heavy construction equipment such as dump trucks, excavators and bulldozers. Motorists should be aware of truck traffic when passing near construction access points and along truck routes.
The HUD Grant stipulates that construction needs to finish by Fall 2024. And construction is scheduled to take 348 days.
Reducing Backwater in Tributaries
This is among multiple stormwater detention basin projects the Flood Control District is developing in the Cypress Creek watershed.
A regional drainage study for the watershed found that flooding along tributaries of Cypress Creek is predominately caused by rising stormwater in Cypress Creek backing up into tributaries. Flooding is not caused by a lack of sufficient stormwater conveyance or drainage capacity on the tributaries themselves. Therefore, stormwater detention basins could be a beneficial project to reduce that backwater issue.
The Mercer Basins will remove the 100-year area of inundation from 30 structures and the 500-year area of inundation from an additional 17 structures.
The project also includes a 30’ wide berm to accommodate maintenance and future recreational amenities.
The project avoids wetlands and will lower the water surface elevation by .35 feet during a 100-year storm event, according to HCFCD.
Upstream detention was one of three major prongs of the strategy to reduce flooding in the Lake Houston Area. This and every other little bit will help downstream.
The regional drainage study found here recommends nearly 25,000 acre-feet of additional stormwater detention in the Cypress Creek watershed. That would be enough to hold back the peak flow during Harvey for almost 5 hours. In lesser storms, the benefit would last even longer.
Posted by Bob Rehak on 1/2/24based on information from HCFCD
2317 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2024/01/Mercer_Map-e1704245017906.png?fit=1100%2C1100&ssl=111001100adminadmin2024-01-02 19:34:562024-01-02 19:47:54Construction Beginning Soon on Mercer Stormwater Detention Basin
Imagine you pull up to a stoplight and two needy people approach you for a handout. You want to help, but have only $1 in your pocket.
Do you give the dollar to the person who has not eaten for the longest time? Or to the person from the zip code with the highest percentage of minorities and lowest average household income?
As you may have guessed, the people at the stoplight are a metaphor for flood victims.
More Needs than Dollars
Harris County doesn’t have enough dollars to build every flood mitigation project that everyone needs. Flood mitigation requires tough choices.
So the County is setting up a supposedly unbiased task force to decide whom to help. But its composition will be biased toward people who believe flood bond money should favor low income, minority neighborhoods, i.e., the constituents of the three politicians pushing the task force (Judge Lina Hidalgo, Precinct 1 Commissioner Rodney Ellis, and Precinct 2 Commissioner Adrian Garcia).
Stacking the Jury
Look at the proposed overview and bylaws for the Community Resilience Task Force. You will see that they embed the concepts of equity, social justice, and social vulnerability into every recommendation the task force will make. For flood mitigation. Housing. Health. Construction. Urban planning. And more. For the next 30 years!
Proposed bylaws for the task force explicitly state that the members MUST demonstrate:
An interest in “equitable” flood mitigation.
Interest in socioeconomic and demographic factors that affect resilience.
So they are baking “equitable” into the job descriptions.
Difference Between Equitable and Equal
“Equitable” treatment sounds like “equal” treatment. But it’s not.
For instance, handicapped people get to park closer to the door. That’s fair…based on need.
But what happens when you start making flood mitigation decisions on the basis of race, income, and social vulnerability? Is that fair to more affluent communities destroyed by flooding?
They never mention that Department of Housing and Urban Development (HUD) Community Development Block Grants for mitigation (CDBG-MIT) and disaster recovery (CDBG-DR) already favor poorer (LMI) neighborhoods.
Nor do they mention that the County has already received a BILLION dollars in CDBG-DR funds. Or that the Texas General Land Office is sitting on top of approximately $4.2 billion in CDBG-MIT funds that it’s trying to distribute. The vast majority of those funds must go toward LMI/socially vulnerable neighborhoods. (The exact percentages vary by storm and type of grant. But they often range up to 70%.)
Problems With Basing Flood-Mitigation Decisions on LMI Data
There are two more problems with basing flood-mitigation decisions on racial and LMI data.
First, it ignores need. Shouldn’t projects that help the largest numbers of people or the worst flooding be mitigated first?
Second, LMI data only comes by zip code. Zip codes can mask huge disparities in wealth. So even if you feel poor people deserve more flood protection than the middle class, it’s hard to ensure that result with zip code data. Elm Grove, for instance, is an LMI neighborhood embedded within an affluent zip code.
He did not mention Army Corps of Engineers grants to HCFCD for work on four bayous in his precinct. Nor did he mention that in the entire history of Harris County Flood Control (which dates back to 1937), not one federal dollar has ever been funneled through HCFCD by the Corps for work in the Lake Houston Area.
4 Out of 5 Flood Bond Projects in SVI Neighborhoods
How much have Ellis, Hidalgo and Garcia skewed flood bond spending to date?
During the Commissioners Court meeting on June 30, 2020, Harris County Flood Control was asked to prepare a report to document the status of flood bond risk reduction projects in socially vulnerable neighborhoods. See Item 2E on Tuesday’s Commissioners Court Agenda. It shows a startling fact.
The distribution looks like this.
And those are just the projects based on Flood Bond money. The Flood Control District is also pursuing additional CDBG grants and Army Corps funding to help fund even more projects in socially vulnerable areas. Those projects are not reflected in these percentages.
Rushing Through Public Comment Period
One measure of how much Ellis, Hidalgo and Garcia want to institutionalize their own definitions of equity is that they’re giving only six more days for public comment with little public warning.
You can bet that the commissioners court meeting on the 28th will be packed with surrogate speakers for Ellis, Hidalgo and Garcia who favor the “equity bias.” They’ve shown up in Commissioners Court for months.
Why wouldn’t they? It’s worked. They now have 4 out of every 5 flood bond projects going into their neighborhoods and they could get even more if this task force goes through in its current form.
Help the greatest number of people for the dollars invested?
Are the poorest?
Or should the money be split equally or on some other basis?
Personally, I think decisions like these should be left in the hands of engineers, not partisan politicians.
Register Your Opinion
The County Judge’s office is inviting the public to share their thoughts and ideas on the proposed draft bylaws of the Task Force. You can register your opinion from now until July 30th, 2020, via one of the following methods:
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/07/Bond-Spending-by-SVI-Index.jpg?fit=1200%2C691&ssl=16911200adminadmin2020-07-24 17:07:032021-07-29 16:06:18Harris County Changing How It Will Choose Which Flood Projects to Support; Welcome to the “Equity Bias”