Second in a series on the Houston Planning Commission’s Livable Places Initiative
“Livable Places” is a new initiative by the City of Houston Planning Commission designed to increase housing affordability and equity while increasing the walkability of neighborhoods.
To achieve these goals, the Commission is recommending new rules that govern development, platting and parking. They would also result in greater housing density especially in inner city neighborhoods. However, they affect the entire city.
Moreover, greater density usually comes at the expense of more impervious cover, which contributes to flooding. Despite several attempts to minimize the growth of impervious cover, the Planning Commission has not studied what the aggregate impact could be.
City Council will consider approval of the recommendations on Wednesday, 6/21/23. This Planning Commission website explains how you can sign up to speak.
ReduceFlooding.com recommends that City Council does NOT approve “Livable Places” recommendations until any potential impact on flooding is known and residents can decide whether the potential increased risk is worth any benefits developers may gain.
Proposed Changes
Specifically, ordinance changes to Chapters 42 and 26 of the City Code would allow:
Second Dwelling Unit: Lets this housing type be larger with parking based on the unit size. Think of apartments over garages or small backyard homes. Only available where deed restrictions do not prohibit their construction.
Multi-Unit Residential: Brings back this affordable housing type which is small scale 3–8-unit apartments with a height restriction to fit better within neighborhoods.
Courtyard Style Development: Promotes this housing type where lots are located around a common courtyard, and do not require street frontage. The proposal includes green space requirement per lot, parking could be separate from the units and height restriction so that homes are at neighborhood scale.
Narrow Lot Development: Incentivizes this housing type where lots take rear access or shared access to reduce the number of times pedestrians come in potential conflict with automobiles. In addition, these regulations help the redevelopment be more walkable by reducing the driveway widths and preventing vehicles from hanging into the sidewalk.
Market Based Parking: For all the four residential development types mentioned above, the proposal is to allow market-based parking in proximity where other transportation options exist and make housing affordable. This means the City will not have a minimum parking requirement, and the property owner can provide parking based on market needs.
Impervious-Cover Impact Unknown
The recommended changes encourage greater density by allowing subdivision of lots. That generally means more rooftops and concrete per acre. Rooftops and concrete are called impervious cover because they do not let stormwater soak into the ground.
Here are the proposed changes to ordinances. They mention impervious cover only once – in the context of courtyard development. And that mention says, courtyards “may be a mix of impervious or pervious material…” They specify no percentages.
Neither do they mention pier-and-beam foundations that could elevate new buildings above flood risk without reducing floodplain storage. Any reduction in the volume of floodplain storage could affect the flood risk of existing homes.
Several department spokespeople pointed out, however, that any development would have a 65% cap on impervious cover. Above that, developers would have to build stormwater detention basins. But the wording of that requirement is reportedly being reconsidered at this time by the Public Works Department.
The Planning Commission did not conduct a comprehensive engineering study to estimate any increase or decrease in impervious cover associated with the recommended changes. That raises the question:
Will impervious cover increase, decrease or stay the same?
The City knows how much impervious cover we have now because the City charges us a Drainage Fee for it. And even though the City cannot predict which types of housing developers will want to build and in what quantities, it could easily calculate the increase or decrease for representative scenarios and make guesstimates.
But we may not know a definitive answer for decades until the impact of these recommendations become visible on the ground or during the next large flood.
Fortunately, the Planning Commission has recommended several changes that may help offset increases in density. They include, but are not limited to:
Elimination of some mandatory parking requirements in neighborhoods where car ownership is low and access to public transportation is high.
Making greater use of alleys to preserve green space in public right of way at the front of lots.
Allowing shared driveways that are narrower than two individual driveways.
Density, Impervious Cover and Drainage Fees
Back in 2010, the City taught us that impervious cover was bad. The City even created a fee to discourage it called the Drainage Fee. Since then, the City has collected 3.2 cents per square foot of impervious surface from each home and business owner with curb and gutter drainage in the City. Those with street ditches pay a slightly lower rate. The total collected to date is reportedly approaching $1.3 billion.
Aerial Photo taken in 2022north of Houston’s downtown.
The proposed changes could make neighborhoods like the one above even denser and tax the capacity of storm sewers/roadside ditches even more. Many of the ditches are already blocked and in serious need of restoration.
Adding more homes per acre in areas with drainage that’s already poor could increase flood risk for existing residents.
More Resources
To learn more about the Planning Commission’s Livable Places initiative and what the Commission believes to be the benefits, visit these resources.
Livable Places does have the potential to provide some benefits to some market segments. So to make sure we get this right, I encourage comment from members of the planning commission, local governments, affected citizens, and flood experts. To submit a guest editorial, reach out to me through the Contact page of this website.
Posted by Bob Rehak on 6/16/2023
2117 Days since Hurricane Harvey
The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.
Concrete reinforcements under and on both sides of the bridge have collapsed from undercutting, erosion and jetting.
The stream has downcut, exposing pipelines.
Jetting has carved out a cavernous area south of the bridge.
Erosion has reached within a few feet of a utility corridor.
Storm sewer outfalls have been exposed, undercut and punctured by massive slabs of displaced concrete.
Bridge supports, once protected by sidewalls, have been exposed to more erosion.
Pictures Taken on 6/12/23 Show Extent of Damage
The bridge will probably not collapse in the next big rain. However, the cumulative damage to all these components underscores the need for urgent repair. It also underscores the need for mitigation to reduce the jetting that caused the damage.
Looking NE at downstream, eastern side of Tree Lane bridgeWider shot from same position reveals two exposed pipelines.Looking upstream under Tree Lane Bridge. Note how downcutting threatens western (left) wall also.Giant slabs of concrete have destroyed outfall.Erosion downstream of the Tree Lane bridge now is within approximately ten feet of a utility corridor.
Damage Accelerating, Repaired Just Three Years Ago
The city repaired the Tree Lane Bridge in March of 2020. Compare this post to see how it looked then. It’s amazing how much damage could be done in three years to a bridge that weathered multiple hurricanes and tropical storms for more than 50 years.
That’s a testament to insufficiently mitigated development upstream that sends ever greater volumes of water downstream – more than the opening under the bridge was designed for.
For a description of how jetting works, check this post. Basically, water backs up behind the bridge, putting greater pressure on the water flowing under the bridge.
Let’s hope the City can repair the Tree Lane Bridge again before school starts in the fall. The bridge borders Bear Branch Elementary School where 638 students attend classes.
Please check bridges near you and report any damage.
Posted by Bob Rehak on 6/12/2023
2113 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2023/06/20230612-DJI_0007.jpg?fit=1100%2C733&ssl=17331100adminadmin2023-06-12 21:28:172023-06-13 09:04:40Flood Damage To Tree Lane Bridge Over Ben’s Branch Accelerates
Mayor Pro Tem Dave Martin has announced that Houston City Council unanimously accepted an additional $29,000,000 in state grant funds to continue dredging around the canals and channels of Lake Houston. The money will also help start a pilot program to trap sediment upstream before it reaches the lake, thereby hopefully reducing dredging costs in the long run.
East Side of Lake
The additional funding will allow dredging activities to start on the east side of Lake Houston in the various canals/channels. Martin emphasized, however, that they have some touch up work to do on Rogers Gully on the west side of the lake before they move to the east side.
Once on the east side, dredging will start near FM1960 and work its way south. The City has not yet established a firm timeline.
DRC will handle the dredging. That is the same company that has handled the dredging since the Corps finished its Emergency West Fork Dredging program several years ago.
DRC will reportedly use mechanical, not hydraulic dredging. That means, they’ll be working with long-armed excavators and scooping dirt onto pontoons. See second picture below.
If successful, this could reduce long-term dredging costs. The pilot program will rely on sand miners to excavate sand from point bars outside their mines. But there are few, if any, mines upstream on Cypress and Spring Creeks, where the miners claim most of the sediment is coming from. So that could limit the replicability of the test, even if successful on the West Fork.
More than 4 Million Cubic Yards Dredged to Date
“Tremendous progress has been made since Hurricane Harvey through the completion of FEMA, Texas Water Development Board, Harris County, and City of Houston projects,” said Martin. “Since 2018, the total combined efforts of these entities have resulted in approximately 4,004,008 cubic yards of silt and sediment dredged from Lake Houston and its tributaries at a total cost of $222 million.” That money has come from federal, state, and local funding sources.
Example of canal dredging. Rogers Gully mouth bar in Atascocita before it was removed. This picture shows mechanical dredgers at work. This blockage was eventually removed, but some touch up work elsewhere reportedly remains.
Blockages like those above can back water up during storms, and flood homes and businesses.
Kudos
Martin passed out kudos to those who supported the $29 million appropriation. Martin thanked former State Representative Dan Huberty and Senator Brandon Creighton for their commitment to seeing this project through and their dedication to the long-term maintenance dredging on Lake Houston.
“Harris County Commissioner Precinct 3, Tom Ramsey, and Harris County Flood Control District have also been terrific partners,” said Martin. “I also want to thank my colleagues on City Council, Mayor Sylvester Turner for his unwavering support for Lake Houston, and Chief Recovery Officer Stephen Costello for his continued diligence on flood mitigation efforts.”
Status of Dredging District Legislation
State Representative Charles Cunningham introduced HB 5341 this year. The bill would have created a Lake Houston Dredging and Maintenance District to handle sediment issues like these in perpetuity. The bill received a public hearing on 4/11/23, but unfortunately, it has stalled in the Natural Resources Committee since then. So has HB 1093, a bill which would have assured cleanup of abandoned sand mines.
With time running out in this session, we will likely need to recycle those bills for the next session.
More news to follow when the dredging starts.
Posted by Bob Rehak on 5/11/2023 based on information from the Houston District E officeand Mayor Pro Tem Dave Martin
2081 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2022/05/20220520-DJI_0451.jpg?fit=1200%2C799&ssl=17991200adminadmin2023-05-11 07:50:472023-05-11 08:22:27Houston City Council Approves $29 Million More For Dredging, Sand Trap Tests
The rate of excavation for another stormwater detention basin on the Woodridge Village property picked up 47% in the last five weeks. That’s compared to the weekly average since Sprint Sand and Clay began excavating last year under the terms of its Excavation and Removal (E&R) contract with Harris County Flood Control District (HCFCD).
March 6, 2023, Sprint has excavated 93,023 CY, according to HCFCD.
Dividing the difference by five weeks, yields an average of 2,532.6 CY per week.
The weekly average since the start of excavation 54 weeks ago equals 1722.7 CY.
So, the February/early March data is an increase of more than 800 cubic yards per week compared to the long-term average, a 47% increase.
Demand for dirt under E&R contracts varies with housing starts and road construction. Housing starts have slowed greatly in recent months as interest rates have increased to cool inflation. It’s not clear yet whether the increased rate of excavation represents a temporary blip or the beginning of a turnaround in the market for dirt.
Then and Now Photos
Here’s the extent of excavation on the new pond as of January 24, 2023.
Woodridge Village Detention Basin #6 at the end of January 2023.Contractors have not yet connected the new basinto others.
Here’s how the new basin looks today from approximately the same location – much longer!
Same location at start of March.Sprint has not yet reached the end of S1, the detention basin on the right.Looking south toward Kingwood. Sprint has the width of four or five more houses to go before it reaches as far as the end of S1. The tree line in the background is the Harris/Montgomery County line.
Increased Rate is Welcome News
The increase in the excavation rate is welcome news for residents who flooded twice in 2019, thanks in large part to Woodridge Village construction practices. Perry Homes left the aborted development about 40% short of Atlas-14 requirements. Since then HCFCD and the City of Houston bought the site and are working on ways to reduce flood risk.
E&R contracts give HCFCD a low-cost head start on mitigation as engineers finalize plans. Knowing that they will need additional stormwater detention capacity, HCFCD established a flexible contract with Sprint for only $1,000. It lets Sprint remove up 500,000 CY and sell the dirt at market rates. This virtually eliminates a major construction cost and provides major savings to taxpayers.
Sprint is obligated to remove a minimum average of 5,000 CY per month and must place the dirt outside of the 100-year floodplain. The contract lasts three years.
Sprint will excavate within the red line. If they move the total 500,000 cubic yards, they will more than double stormwater detention capacity on the site.
Posted by Bob Rehak on 3/6/2023
2015 Days since Hurricane Harvey and 1264 since Imelda
The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2023/03/20230304-DJI_0190.jpg?fit=1200%2C799&ssl=17991200adminadmin2023-03-06 15:31:292023-04-03 15:55:23Rate of Woodridge Village Excavation Increases 47%
City of Houston Mayor Pro Tem Dave Martin’s office has supplied ReduceFlooding.com with the Black & Veatch Engineering report on the recommended alternative for adding floodgates to Lake Houston. One key finding immediately jumped out at me that wasn’t in Martin’s press release last week. The recommended gates would have a release capacity that virtually equals the highest release rate of Lake Conroe during Hurricane Harvey.
The Lake Conroe release rate during Harvey maxed out at 79,000 cubic feet per second (CFS).
The eleven tainter gates recommended by Black & Veatch would have a release rate of 78,700 CFS.
New Possibilities, More Certainty
That opens up a world of possibilities. For instance, the City could wait to start releasing water until it knew water was coming downstream from Harvey.
Said Martin, “Once constructed, we can release with a moments notice which gives us great opportunities to coordinate release protocols with the SJRA!!”
Previously, Public Works has been reluctant to release water in advance of a storm because the release rate of the existing gates is so small. They have to start lowering the lake so far in advance of storms that a storm can veer away before it gets here. If it does, that means water has been wasted.
The recommended floodgates should provide much more certainty for operators and avoid waste.
Key Elements of Recommendation
Gates would be placed at the original channel for the San Jacinto River seen in foreground.
Other key elements of the recommendation include:
Locating the floodgates in the earthen eastern portion of the dam near the old channel of the San Jacinto River.
Creating baffles and a dissipation basin downstream from the new gates to break up the flow and reduce water velocity
“Outdenting” the gates (i.e., building them in front of the current dam)
A bridge between the two parts of the earthen dam
Using tainter gates, the same type used at Lake Conroe.
A 3.5 year construction schedule.
The last point means that if construction started in January, the earliest completion date would be mid-2026.
For a complete discussion of the project history, constraints, alternatives, recommended options, construction drawings, rationales, and costs, see the entire 28-page Black and Veatch Report by Chris Mueller, PhD, P.E.
Posted by Bob Rehak on 12/14/22 based on the Black & Veatch Report
1933 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2022/12/20220722-RJR_0779.jpg?fit=1200%2C800&ssl=18001200adminadmin2022-12-14 19:42:472022-12-14 19:45:58Recommended Floodgates Could Release at Rate of Lake Conroe During Harvey
Because the Laurel Springs RV Resort was grandfathered under old drainage regulations, it got away with building a detention pond that was half the size required by current regulations.
But assuming the developers were just shrewd businessmen who legally and successfully exploited the system, did they follow the rest of the rules? Let’s look at two other things.
The percentage of impervious cover on the site
How the number of parking spots increased 25% without the impervious cover increasing.
Laurel Springs RV Resort as of 10/22/22. The contractor still has one more “pour” to complete the concrete in the far upper right of the image.
Were Impervious Cover Calculations Correct?
Detention-pond volume calculations begin with impervious cover (i.e., land covered by concrete plus the entire detention pond area). See below.
The total site covers 20.032 acres. The proposed impervious portion, they claim, covers 13.349 acres. That works out to 66.6%. So one third of the site should be grass, trees and other vegetation. But since the entire 5-acre detention pond counts as impervious, mathematically, the remainder of the site can have no more than about 60% concrete and still comply with the percentage they promised.
But just eyeballing that trapezoidal area in the photo above, it seems much more than 60% is covered with concrete.
If my eyeball assessment is correct, then the detention pond is even more undersized than I initially thought because the percentage of impervious cover has increased and with it the amount of runoff.
I wish the developer would show us the basis for those calculations.
Plans Show Increase in Density With No Increase In Impervious Cover
The developer’s permit allows 182 RV spaces, but the plans show 226 – about a 24% increase. However, the impervious cover shown on the plans before and after the permit approval didnot change. That could also affect detention pond capacity requirements. And explain why the percentage of concrete appears higher than they claim.
Why Underestimate Impervious Cover?
Why would a developer underestimate the amount of impervious cover? Two reasons:
It would make the detention pond smaller and thus allow the remaining property to produce more income.
I’m not alleging they did anything illegal. I’m just saying that much more than 60% of that trapezoid in the photo above appears to be concrete and I sure would like to see how they arrived at their figures. I requested the drainage analysis twice and never got it. That should tell you something.
Posted by Bob Rehak on 10/23/22
1881 Days since Hurricane Harvey
The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.
Amendment 11 from the Texas Hurricane Harvey Action plan will let the Texas General Land Office (GLO) take over unused money from seven Houston disaster relief funds. The money will be reallocated to a state-run Homeowner Assistance Program (HAP) currently administered by the GLO on behalf of Houston residents.
On 10/7/22, GLO posted Amendment 11 to the State’s Action Plan for $5.676 billion in Community Development Block Grants for Disaster Recovery (CDBG-DR) related to Hurricane Harvey. View the entire 461-page Action Plan Amendment 11 at https://recovery.texas.gov/public-notices/index.html. Or see the major changes below.
File photo from June 2021.Flood damaged home on Houston’s NE side, still needing repair.
Reallocation of $141 Million
Amendment 11 deals with the $1.2 billion in CDBG-DR funds previously allocated to and administered by the City of Houston. The amendment reallocates $140,930,253 in unused funds from seven City of Houston disaster relief programs. The money will be reallocated to a state-run Homeowner Assistance Program (HAP) administered by the GLO on behalf of Houston residents.
Reason for the reallocation? The City programs repeatedly failed to meet contract benchmarks and deadlines.
The GLO acted after the City missed contractual benchmarks designed to ensure that funds for City of Houston residents are expended before HUD’s final program deadlines.
GLOcurrently administersthe “City of Houston Homeowner Assistance Program,” nicknamed HAP, the acronym used by the state as opposed to HoAP, which the City used.
Latest City Pipeline Report
The City doesn’t publish statistics for all of its programs in its monthly “Pipeline Reports.” However, the most recent, dated 9/6/2022 shows the following:
This whole issue came to a head several years ago when the GLO attempted to step in once before as programs were expiring. The City sued the GLO to keep the programs. A settlement let the GLO keep some and the City others. But it also stipulated that the City had to meet strict deadlines and quotas.
The City had to clear a certain percentage of its backlogs each month. The City missed those contractual deadlines repeatedly according to the GLO. And now the GLO is stepping in to help as many people as it can with the unused funds.
The GLO will only reallocate funds not already obligated to a project by the City. All funds will stay in Houston to benefit the residents of Houston. Funds should now get to residents in a faster and more efficient manner.
GLO has helped thousands of homeowners statewide in less time than the City has helped several hundred.
Reasons Cited for Delays, Slowness
The City blames the GLO for delays. However, many of the applications submitted by the City to the GLO early on were incomplete, lacked required documentation, or didn’t meet program requirements. Reasons cited for the Houston Housing and Community Development Department problems included bad hiring decisions, poor record keeping, training failures, refusal to accept help, political interference, unwillingness to follow GLO recommendations, making programs overly complicated, late starts, and procedural violations.
The GLO maintains it has not slowed the City of Houston from using disaster recovery funds – only prevented the City from using them improperly. “Any delays are a result of the City of Houston’s misplaced focus on circumventing rules and requirements,” said a GLO spokesperson.
Attempting to Help Those in Need Faster
Caught in the middle are the most vulnerable among us.
According to U.S. Department of Housing and Urban Development (HUD) statistics, nearly 90% of the homeowners served by the affected programs have incomes less than 80% of the area’s median income (AMI).
Nearly two thirds of the Houston homeowners served by the GLO’s program make less than 30% of the AMI. In Houston, this would include families of four living on $26,600 or less.
Also, 64% of the homeowners identify as Black/African American and 25% identify as Hispanic/Latino.
Finally, about 87% of approved homeowners are female heads of households and at least 72% are aged 65 or older.
The GLO’s Houston HAP demographics are updated monthly and available online.
Main Changes in Amendment 11
City of Houston Impacts
The amendment includes the following changes. Funds remaining with the City of Houston for all disaster recovery programs would be reduced to $694,157,590 from $835 million.
The difference – $140,930,253 in uncommitted funds – would be taken from the following City programs, which would be reduced to:
Homeowner Assistance Program (HoAP) – $69,188,511.
Multifamily Rental Program – $400,855,752.
Small Rental Program – $12,943,423.
Homebuyer Assistance Program – $18,381,000.
Public Service – $20,000,000.
Economic Revitalization Program – $18,888,904.
State of Texas Impacts
State administered disaster recovery programs increase to $4,064,897,426.
The State-administered City of Houston Homeowner Assistance Program increases to $565,601,475.
The last total exceeds the $141 million because the State had previously taken over several programs that the City relinquished.
To Comment on Amendment 11…
The amendment triggers a federally required 30-day public comment period.
Submit all comments to cdr@recovery.texas.gov by 5:00 p.m. on Monday, Nov. 7, 2022, to be considered. Per federal requirements, the GLO must respond to public comments before the amendment can be sent to HUD for its 45-day final approval.
Posted by Bob Rehak on 10/8/22
1866 Days since Hurricane Harvey
The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2022/10/20210626-RJR_8685.jpg?fit=1200%2C800&ssl=18001200adminadmin2022-10-08 19:43:482022-10-10 14:13:00GLO Posts Amendment 11 to Harvey Plan Affecting Houston Flood Victims
On October 3, 2022, the City of Houston announced an update of its 568-page Infrastructure Design Manual (IDM). The new IDM will govern all new construction within the jurisdiction of Houston after October 1.
Residents concerned about the possibility of new construction negatively affecting drainage should review it and related documents to make sure contractors adhere to requirements. At a minimum, neighbors should understand the outcomes that the City expects developers to achieve in case something goes wrong.
Chapter 9 addresses Stormwater Design and Water Quality Requirements. At a minimum, make sure you read Section 9-2, pages 183 and 184 of the PDF. The City lays out the high-level requirements and objectives for developer/contractors.
Goals Guiding Drainage Standards
Chapter 9 begins with several paragraphs that lay out the obligations of developers and contractors. I’ve condensed them for brevity below. See the original document for the exact wording.
9.1.02.A (1)
Drainage criteria for newly designed areas must provide protection from Structural Flooding during a 100-year storm event.
9.1.02.A (2)
Recognizing that each site has unique differences, the City may consider alternatives (pipe flow, overland sheet flow, and detention storage) that still achieve objectives.
9.1.02.B
Ponding in streets and roadside ditches of short duration is anticipated and designed to contribute to the overall drainage capacity of the system.
9.1.02.C
When rainfall events exceed the capacity of the storm sewer system, the additional runoff is intended to be conveyed or stored overland in a manner that reduces the threat of structural flooding.
All proposed New Development, Redevelopment, or Site Modifications shall not alter existing or natural overland flow patterns and shall not increase or redirect existing sheet flow to adjacent private or public property.
Where the existing sheet flow pattern is blocked by construction (i.e. raising the site elevation) of the Development, the sheet flow shall be re-routed within the developed property to return flow to original configuration or to the public right of way (ROW).
Except under special circumstances dictated by natural or existing drainage patterns no sheet flow from the developed property will be allowed to drain onto adjacent private property.
No impact will be allowed onto adjacent property.
9.1.02.C of CoH 2022 Infrastructure design manual
No sheet flow from the developed property may drain onto the adjacent ROW.
Any increased quantity discharge should only be discharged to the ROW at the approved point of connection (which have enough capacity to handle the discharged) via a subsurface internal drainage system.
Hurricane Harvey flooded 100 percent of all the businesses in Kingwood Town Center. Recovery has been a long, hard road. Some retailers threw in the towel. Others hung on by their nails. The shopping center on the northwest side of Kingwood Drive and West Lake Houston Parkway was one of the hardest hit – caught between rising waters from Lake Houston and descending waters from Bens Branch. For several years, the entire center looked like a ghost town.
City of Houston crews remove sediment from under Kingwood Drive Bridge over Bens Branch by shopping center.
The remediation efforts seem to have bolstered confidence and encouraged the return of retailers.
Pardon Their Dust
For the last two years, loyal customers had to dodge construction as the shopping center got a facelift. But last month, the construction trailer and fencing disappeared. Today, I counted only four vacancies in the main part of the shopping center. And workmen are busy doing interior buildout on some of those.
Ghost-Town Look Gone
The ghost-town look is gone…replaced by pristine exteriors, new signage, and fresh landscaping. It will only be a matter of time before the remaining spaces refill.
Here’s how the center looks today.
A new Trek bicycle store recently opened, and makes a nice complement to other retailers. Around the corner, a fresh new look for the urgent care center and Walgreens.
Still Searching for Anchor Tenant…
Unfortunately, the center still lacks an anchor tenant.
The leasing agent, NewQuest, is rumored to have been in discussions with a large fitness center to occupy that space or part of it. This morning, I saw electricians entering the space to work. But NewQuest did not return a phone call to confirm or deny a deal with a new tenant. NewQuest’s website still shows the space officially for lease.
…But Appraised Value Quadruples Since Harvey
Regardless, you can see another sign of the shopping center’s success on the Harris County Appraisal District website. The appraised value of the center has more than quadrupled since those bleak days after Harvey.
Five-year appraised value history from HCAD.orgas of 9/8/22.Screen capture from HCAD.org as of 9/8/22.
Welcome Back, Retailers!
If you avoided this center during construction, explore what all the small business owners have to offer.
Posted by Bob Rehak on 9/8/2022
1836 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2022/09/20220908-RJR_0963.jpg?fit=1200%2C800&ssl=18001200adminadmin2022-09-08 15:17:032022-09-08 17:09:21Major Kingwood Shopping Center Almost Back
Tomorrow is the fifth anniversary of Hurricane Harvey. Many in the Lake Houston Area have asked, “Are we safer now?” The answer is yes, but we have a long way to go to achieve all our goals. Here’s a five-year flood-mitigation report card. It describes what we have and haven’t accomplished in 29 areas. So get ready for a roller coaster ride. I’ll leave the letter grades to you.
Lake Houston Area Mitigation
1) Dredging
The most visible accomplishment in the Lake Houston Area since Harvey is dredging. The City and Army Corps removed approximately 4 million cubic yards of sediment blocking the West and East Forks. Before dredging, River Grove Park flooded six times in two months. Since dredging, it hasn’t flooded once to my knowledge.
West Fork mouth bar after Harvey and before dredging. Now gone, but not forgotten.
Potential location for new tainter gates east of the spillway portion of the dam (out of frame to the right.
3) Upstream Detention
To reduce the amount of water coming inbound during storms, the San Jacinto River Basin Master Drainage Study identified 16 potential areas for building large stormwater detention basins. Unfortunately, they had a combined cost of $3.3 billion and would only reduce damages by about a quarter of that.
So, the SJRA recommended additional study on the two with the highest Benefit/Cost Ratio. Their hope: to reduce costs further. The two are on Birch and Walnut Creeks, two tributaries of Spring Creek near Waller County. Expect a draft report in February next year.
Funding these would likely require State assistance. But the Texas Water Development Board’s San Jacinto Regional Flood Planning Group has just recently submitted its first draft report. The draft also recommended looking at detention basin projects on West Fork/Lake Creek, East Fork/Winters Bayou, and East Fork/Peach Creek.
Building them all could hold back a foot of stormwater falling across 337 square miles. But funds would still need to be approved over several years. We’re still a long way off. Results – on the ground – could take years if not decades.
4) “Benching”
The Regional Flood Planning Group also recommended something called “benching” in two places along 5 miles of the West Fork. In flood mitigation, benching entails shaving down a floodplain to create extra floodwater storage capacity. Like the detention basins, benching is still a long way off…if it happens at all.
5) West Fork Channel Widening
Finally, the Regional Flood Planning Group recommended widening 5.7 miles of the West Fork to create more conveyance. But again, at this point it’s just a recommendation in a draft plan.
San Jacinto River Authority
6) SJRA Board Composition
After Harvey, many downstream residents accused SJRA of flooding downstream areas to save homes around Lake Conroe. At the time, SJRA’s board had no residents from the Humble/Kingwood Area. So Governor Abbott appointed two: Kaaren Cambio and Mark Micheletti. Cambio later resigned due to a potential conflict of interest when she took a job with Congressman Dan Crenshaw. That leaves Micheletti as the lone Humble/Kingwood Area resident on a seven-person board. However, the SJRA points out that the Board’s current president, Ronnie Anderson, represents Chambers County, which is also downstream.
State Representative Will Metcalf, who represents the Lake Conroe area, introduced a bill to limit SJRA board membership to upstream residents. Luckily for downstream residents, it failed.
7) Lake Conroe Lowering
SJRA identified temporary, seasonal lowering of Lake Conroe as a strategy to reduce downstream flood risk until completion of dredging and gates projects in the Lake Houston Area. The lowering creates extra storage in the lake during peak rainy seasons. After SJRA implemented the plan, Lake Conroe residents objected to the inconvenience. They sued SJRA and the City, but lost. After discussion with all stakeholders, the SJRA quietly modified its plan. It still lowers the lake, but not as much.
8) Lowering Lake Houston
Houston also started lowering Lake Houston, not seasonally, but in advance of major storms. The City has lowered the lake more than 20 times since beginning the program. That has helped to avoid much potential flooding to date.
9) Lake Conroe Dam Management
SJRA applied for and received several TWDB grants to enhance flood mitigation and communications in the San Jacinto River Basin. One involves developing a Lake Conroe Reservoir Forecasting Tool. SJRA has also worked with San Jacinto County to develop a Flood Early Warning System.
Finally, SJRA’s Lake Conroe/Lake Houston Joint Reservoir Operations Plan is on hold pending completion of the City’s plan to add more gates to the Lake Houston dam. Such projects may help reduce the risk of releasing unnecessarily large volumes of water in the future.
However, the location is controversial. Geologists say it wouldn’t reduce sediment in the area of greatest damage. Environmentalists worry that it could increase sedimentation through a “hungry-water” effect and open the door to river mining. And I worry that, even if successful, the pilot study would not be extendable. That’s because it relies on partnerships with sand miners. And other tributaries to Lake Houston do not have sand mines or as many sand mines.
Sand bar blocking West Fork after Harvey. The Corps has since removed it.
Federal Funding
It’s hard to get good grades on your flood mitigation report card without funding.
$1.6 million for HCFCD for Taylor Gully stormwater channel improvement.
$1.6 million for HCFCD for Kingwood Diversion Channel improvement.
$1.67 million for Harris County for the Forest Manor drainage improvement project in Huffman.
$8.2 million from FEMA the Westador Basin stormwater detention project on Cypress Creek.
$9.9 million from FEMA for the TC Jester storm water detention basin on Cypress Creek.
Crenshaw also has backed community requests for more funding in Fiscal 23. They include:
$8 million for the Lake Houston Dam Spillway (Gates).
$10 million for the Woodridge Stormwater Detention Basin (see below).
$10 million for a Cedar Bayou Stormwater Detention Basin.
Harris County Flood Control
19) Channel Maintenance and Repair
Harris County Flood Control has already completed several maintenance projects in the Lake Houston Area. In Kingwood, those projects include Taylor Gully, Ben’s Branch, parts of the Diversion Ditch and other unnamed ditches. In Atascocita, HCFCD also completed a project on Rogers Gully. Upstream, HCFCD is working on the third round of repairs to Cypress Creek. Batch 3 includes work at 12 sites on 11 channel sections. I’m sure the District has maintenance projects in other areas, too. I just can’t name them all.
Bens Branch near Kingwood High School after sediment removal.
In 2019, uncontrolled stormwater from the Woodridge Village development twice flooded approximately 600 homes in Elm Grove Village and North Kingwood Forest. HCFCD and the City purchased Woodridge from Perry Homes last year. HCFCD soon thereafter started removing sediment from the site to create a sixth stormwater detention basin that would more than double capacity on the site. At the end of last month, contractors had removed approximately 50,000 cubic yards out of 500,000 in the contract. This gives HCFCD a head start on excavation while engineers complete the basin’s final design.
21) Local Drainage Study Implementation
HCFCD authorized four studies of the drainage needs in the Lake Houston Area. They completed the Huffman and Kingwood studies. Atascocita and East Lake Houston/Crosby started earlier this year and are still underway.
The Kingwood study measured levels of service in all channels and outlined strategies to improve them to the 100-year level. The first two projects recommended: Taylor Gully and the Kingwood Diversion Ditch. Neither has started construction yet. But see the notes under funding above.
The Huffman Study recommended improvements to FM2100, which TxDOT will handle. It also recommended dredging in the East Fork near Luce Bayou which the City has completed. Finally, it recommended a bypass channel for Luce. However, pushback from residents forced cancellation of that project.
22) Buyouts
HCFCD completed buyouts of 80+ townhomes on Timberline and Marina Drives in Forest Cove last month. Contractors demolished the final run-down complex in August. That should improve property values in Forest Cove.
Completion of demolition of one of the last Forest Cove Townhome Complexes in July 2022.
23) Regulation Harmonization
Harris County Flood Control and Engineering have been working to get municipalities and other counties throughout the region to adopt certain minimum drainage regulations. I discussed the importance of uniformly high standards in last night’s post. So far, about a third of the governments have upgraded their regs. A third are still deciding whether to act. And the remainder have taken no action. There has been little movement in the last six months.
City of Houston
As mentioned above, the City has taken a lead role in dredging, adding gates to Lake Houston, and proactive lake lowering. In addition, the City has helped with:
24) Bridge Underpass Clean-Out
The City of Houston successfully cleaned out ditches under Kingwood Drive and North Park Drive in at least six places. Bridges represent a major choke point during floods. So eliminating sediment buildups helps reduce flood risk in areas that previously flooded.
Excavation of Bens Branch under Kingwood Drive by City crews.
The lowest score on the flood-mitigation report card probably goes to LSGCD.
26) Subsidence
The Lone Star Groundwater Conservation District has started pumping groundwater again at an alarming rate. Projected subsidence near the Montgomery County Border equals 3.25 feet, but only 1 foot at the Lake Houston dam. That could eventually tilt the lake back toward the Humble/Kingwood/Huffman area and reduce the margin of safety in flooding. That’s bad news.
Sand Mining Regulations
Twenty square miles of West Fork sand mines immediately upstream from I-69 have exposed a swath of floodplain once covered by trees to heavy erosion during floods. Mathematically, the potential for erosion increased 33X compared to the normal width of the river. Sand mines were also frequently observed releasing sediment into the river. And the dikes around the mines often wash out.
So in 2019, the Lake Houston Area Grassroots Flood Prevention Initiative (LHAGFPI) began meeting with legislators, regulators and the Texas Aggregate and Concrete Association (TACA). The goal: to establish comprehensive Best Management Practices (BMPs) for the sand mining industry in the San Jacinto River Basin.
27) Mine Plan/Stabilization Reports Now Required
TCEQ adopted new regulations, effective January 6, 2022. They required miners to file a ‘Mine Plan’ by July 6, 2022 and also a ‘Final Stabilization Report’ when a mine is played out.
28) Vegetated Buffer Zones (Setbacks)
The new regs also stipulate undisturbed vegetative buffer zones around new mines. Buffer zones aid in sediment filtration and removal by slowing surface water. They also strengthen dikes.
The new regs require a minimum 100-foot vegetated buffer zone adjacent to perennial streams greater than 20 feet in width. However, for streams less than 20 feet wide, the buffer zone is only 50 feet for perennial streams, and 35 feet for intermittent streams.
29) Reclamation Bonds
Unfortunately, the Flood Prevention Initiative could not convince TCEQ to require ‘reclamation bonds.’ Other states use such bonds to prevent miners from abandoning mines without taking steps to reduce future erosion, such as planting vegetation.
My apologies to any projects or parties I omitted. Now it’s your turn. Give grades to those you think have done the best job on YOUR Harvey flood-mitigation report card.
Posted by Bob Rehak on 8/26/22
1823 Days since Hurricane Harvey and one day from Harvey’s Fifth Anniversary
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2021/04/20210416-DJI_0406.jpg?fit=1200%2C900&ssl=19001200adminadmin2022-08-26 22:09:382022-08-27 12:10:28Harvey: A 5-Year Flood-Mitigation Report Card
