Tag Archive for: City of Houston

Contractors Begin Excavation of N1 Detention Pond at Perry Homes’ Woodridge Village

In the last week, contractors have finally started excavating the N1 detention pond at Woodridge Village. Work on the excavation of N2 continues. It also appears that they may have started prep work for excavating the N3 pond. See photos below.

All this comes:

The next Commissioners’ Court Meeting is set for May 19. The agenda for that meeting should be posted May 15.

Excavation Begins on N1 Pond (First Pond on Northern Section)

On May 5, 2020, Jeff Miller, an Elm Grove resident, noticed excavation activity near the Webb Street entrance to Perry Homes’ Woodridge Village. Engineers designated this area for the N1 (first northern) detention pond.

Photo Courtesy of Jeff Miller from Webb Street Entrance in Porter taken on 5/5/2020 shows excavation beginning on N1
Closer photo by Miller from Webb Street Entrance also taken on 5/5/2020
Wider shot by Miller on same date shows additional prep work on N1 site

Miller also shot this video on 5/6/2020, showing the progress contractors have made on the excavation in one day.

Video by Jeff Miller, Elm Grove resident on 5/6/2020.

N2 Excavation Continues

I took the shot below on May 1 with a telephoto lens from the north end of Village Springs in Elm Grove. It shows excavation work continuing on the N2 pond.

Excavation work on N2. Photo taken on 5/1/2020.

Additional Work in Area of N3 Pond

Additional work near area of N3. This excavator was loading up three dump trucks on May 1, 2020.
The dump trucks hauled dirt back to the soupy portion of the Woodridge Villages northern section, then circled back.

On May 5th, Jeff Miller photographed the N3 area from a closer vantage point. It appears only the surface layer has been scraped off so far.

Photo of N3 area courtesy of Jeff Miller taken on 5/5/2020.

Putting New Work in Context of Entire Project

Here’s the layout for the five Woodridge Village Detention Ponds. Contractors finished work on the two southern ponds earlier this year.

Woodridge Village has five detention ponds at various stages of completion. Northern ponds are now under construction. Southern ponds are completed.
At the time of last year’s May flood, only S1 was complete. S2 was substantially completed by September’s flood. The northern ponds had not yet been started.

When the northern detention ponds are complete, the detention system will still not be fully functional because there are no streets or storm drains yet to funnel water into them. Still, some detention is better than no detention with hurricane season three weeks away and an above average season predicted.

City Still Needs to Meet Two Conditions

Perry Homes swears that the work being done now will not affect the purchase price if the County makes a decision on the property by May 15th. At their last meeting, commissioners made the purchase contingent on the City of Houston:

  • Adopting Atlas-14 rainfall statistics
  • Donating $7 million worth of land to HCFCD for flood control projects and to help offset the purchase price of Perry’s property.

No items relating to the purchase appeared on this week’s City Council agenda. But Council meets again next week before the deadline expires.

The County hopes to meet with the City next week to discuss the donation of land. The County also reportedly feels that the four days between Perry Homes’ extended deadline (May 15) and the next commissioners’ court meeting (May 19) will not present a problem if the the City meets the conditions.

Posted by Bob Rehak on 5/6/2020 with thanks to Jeff Miller

981 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.

Planning Commission Concerns About Romerica Land Seem More Procedural than Flood-Related

Last week, the Houston Planning Commission deferred approval of the General Plan for Romerica’s Orchard Seeded Ranches in Kingwood. A City of Houston Planning and Development Department document obtained this afternoon suggests that concerns about the West Fork development may have been more procedural than flood-related.

Much of Romerica’s land lies between the Barrington in foreground and San Jacinto River in background. All 283 homes in Barrington flooded during Harvey.

Of the ten concerns listed in a letter to the permit applicant, only one had to do with flooding. And that came from Harris County Flood Control, not the City. Nine other concerns had to do with street spacing and layouts or labelling.

Half of Land in Floodway

Half of Orchard Seeded Ranches is in the floodway (below red line) of the San Jacinto West Fork.
Half of Orchard Seeded Ranches is in the floodway (below red line) of the San Jacinto West Fork. That line will shift north on new flood maps.

Half of the land lies in the floodway of the West Fork. The other half lies in the hundred-year floodplain. The development would be built on the same property that Romerica tried to get approved last year. The company wanted to build a series of high rises and 5,000 condominiums. That proposal drew a record 770 letters of protest to the Army Corps. Despite all that…

The Planning Commission document indicates that the City Engineer had no comments on the proposal.

Last week it appeared that the balance of power might be shifting at City Hall from developers to flood-weary residents. This week, it appears the other way around.

Only Harris County Flood Control Raises Serious Objections

Harris County Flood Control District (HCFCD) recommended deferral of any approvals until the master drainage plan for the development is reviewed. HCFCD also said, “This area has historically been prone to flooding with numerous home buyouts immediately to the west. The Flood Control District, City of Houston, Montgomery County, and San Jacinto River Authority are working on a planning study to reduce flood risk in this area.”

Those partners should complete the San Jacinto Regional Watershed Master Drainage Plan final report by September this year.

Part of that plan will include new flood surveys. They will likely show the floodway expanding to take in an even greater percentage of Romerica’s property.

Gear Up for Another Lengthy Fight

It should not take the developer much time to address City’s concerns. It’s unclear at this time whether the City will heed the HCFCD’s concerns.

As a result, this controversy could wind up back in the hands of the Army Corps and/or the US Fish and Wildlife Service again. Last year, the Fish and Wildlife Service wrote an uncharacteristically frank recommendation to the Corps, urging the Corps to deny Romerica’s permit. Their reasoning had to do with the value of wetlands on the property and the presence of American Bald Eagles, a protected species.

Bald eagle photographed adjacent to Romerica property in February, 2020.

In the meantime, the developer may realize that it still faces an uphill struggle even with City approval. Perhaps they will come to their senses and sell this land to a group or groups that wish to preserve it as green space for flood control and recreation.

Light pole near River Bend in North Shore as Harvey receded. Note the "wet marks" several feet up on pole. Photo by Jim Balcom.
Light pole by westernmost Romerica property as Harvey receded. Photo by Jim Balcom.

As if to underscore the value of that proposition, the Bayou City Initiative today announced a virtual meeting to discuss the difficulty of mass evacuations and sheltering during the hurricane season as the COVID crisis continues. Remember that most of this land was under 20+ feet of water during Harvey.

Posted by Bob Rehak on 4/5/2020

980 Days since Hurricane Harvey

Tools to Track Permit Applications for Developments Near You

Have you ever been flooded by a new development? Did you learn about the development AFTER bulldozers started knocking down trees? There’s a much better way. The City of Houston offers several tools to help you track applications for new developments long before the bulldozers start belching diesel fumes.

GIS PlatTracker Map

The first is an interactive, color coded GIS map that shows the status of all permit applications in the City and its ETJ (extra-territorial jurisdiction). The ETJ extends well beyond the boundaries of the City. Going up 45, it extends to 242. Going up 59, it extends to Roman Forest.

City of Houston PlatTracker map for Northeast Houston and Lake Houston Area as of 4/30/2020

If someone has applied for a permit to develop a piece of land, it will show up on the map. Notice the purple areas along the West Fork west of the Kingwood Country Club. That’s how I learned about the reactivation of Romerica’s plans.

The color of the parcels corresponds to the stage of the application. Clicking on the parcel pulls up an information panel that gives you more history including the date the developer submitted the application, when it will be reviewed, the review stage, and more.

Zoom in and out as wide as you want. Just be aware that the wider you zoom, the longer it takes the screen to refill with all the plat information. There’s a lot more of it!

As I zoomed out around Kingwood, the number of new developments that I was unaware of shocked me. If you want to see humongous changes, look south of Humble, east to Huffman, west to Spring, and north to Porter and New Caney. Kingwood is a relative island of quiet in a sea of change.

Other Related Interactive Maps

The PlatTracker Plat Map is just one of thirty other interactive maps that you can use to explore and monitor the City around you. They include, but are not limited to:

  • Land use
  • Water flood hazards
  • Governmental boundaries
  • Demographics
  • Annexation history
  • Address and Permit Information

PlatTracker Agenda/Spreadsheet

Once you have identified a development you are interested in, another site can help you learn more about when the Houston Planning Commission will consider applications related to the site. It will also give you:

  • Subdivision plat name
  • Application Number
  • Date Submitted
  • Subdivision type
  • Variance requests
  • Location on the Commission’s agenda
  • County
  • Council district
  • Precinct
  • Census Tract
  • Zip Code
  • School district
  • TIRZ (tax increment reinvestment zone) if any
  • Superneighborhood Council
  • Land Use
  • Number of Lots
  • Acreage
  • Appraisal district numbers
  • Developer Name
  • Applicant Company
  • Applicants Name
  • Phone Number

You can even download the latest documents related to the application.

For Planning Commission meeting dates and agendas, click here.

Situational Awareness for Concerned Citizens

Wow. Everything you need to put your mind at ease. Or stage a protest. All at your fingertips.

These are great tools for concerned residents and citizen activists.

I’m sure a lot of Elm Grove residents wish they had known about these tools before the bulldozers started knocking down trees in Woodridge Village.

For future reference, I’ve added links for these sites within ReduceFlooding’s Links Page under the Community heading.

Posted by Bob Rehak on 4/30/2020

975 Days since Hurricane Harvey

Commissioners Will Vote Tuesday On Measure That Could Improve Drain/Ditch Maintenance

On Tuesday, Harris County Commissioners will vote on an asset-swap proposal that could improve drain and ditch maintenance county wide. It’s item 2A1 on the Commissioners Court Agenda. But it may take a while to implement. Here’s the background.

Untangling Overlapping Responsibilities

During recent storms, many blamed local flooding on lack of drain and ditch maintenance. The 80,000 cubic yards of silt clogging the lower portion of Ben’s Branch is just one example. Hundreds of others exist throughout the City of Houston and Harris County.

As the City and County Flood Control District tried to determine who was responsible for what, they became mired in legal tangles. Often, they discovered, both entities had responsibility for different portions of the same ditch.

But determining where one’s responsibilities stopped and the other’s started delayed mitigation and ran up legal fees. And even where responsibilities were clear cut, they wound up mobilizing two different crews, when one would have sufficed. This duplication of efforts ran up mitigation costs needlessly. It also often resulted in a patchwork quilt of repairs where one part of a ditch was maintained and another was not. And that reduced effectiveness.

Dividing Responsibilities by Core Competency

Luckily, common sense prevailed. The City and County reached an agreement in principle after Harvey to exchange responsibilities. Now each will focus on its core competency to maximize efficiency.

The goal: to get to a point where the City takes over responsibility for underground drainage and the County takes responsibility for above ground inside City limits.

One of the Flood Control District’s core competencies resides in ditch maintenance and improvements. Likewise, the City Public Works Department specializes in storm drains and sewers.

Any business school grad can tell you that companies maximize efficiency when focusing on their core competencies. The key: outsourcing parts of businesses where others offer greater efficiency.

Gradual Changeover In Series of Asset Swaps

However, the changeover won’t be like flipping a universal switch. It will happen gradually over several years with a series of asset swaps. Why? To ensure that neither side becomes saddled with deferred maintenance costs of the other.

Accordingly, each asset must be brought up to standards before swapping responsibilities.

See the explanation for Agenda Item 2A1 – The Houston City Council approved the interlocal agreement on February 27, 2020. Harris County Commissioners will vote on it on Tuesday, 4/28/2020.

Along with the agreement, the parties have identified the first batch of properties for exchange. However, they have not yet publicized those.

Only One Potential Problem

I only see one problem with this program. Some ditches that desperately need maintenance may not qualify for exchange before people flood.

Kings Forest, for example, has a ditch that parallels Valley Manor, west of Kingwood High School. Like Ben’s Branch, the City never maintained it. Now, water backs up dangerously close to homes on Kingsway Court and Twin Grove during heavy rains.

Rick Beaubien, a resident who lives near the ditch, took the pictures below.

Downed trees in ditch between Valley Manor and Twin Grove.
Clogged drain in same ditch.
North side of Kingwood Drive looking south. Trees and silt block channel and culverts. You can tell by the size of the trees that no one has maintained this ditch in a long time.
Same culverts, but in center of Kingwood Drive.
Exit of same culvert south of Kingwood Drive

Dustin Hodges, District E North Sector Manager for Mayor Pro Tem Dave Martin indicates that Public Works is working on a plan to maintain this and other ditches. However, he also admits that “Currently, there are no available funds to address this ditch and there is no timeline on when any funds would be available for this ditch.”

Theory Good, Time Will Tell

I wholeheartedly support the asset-exchange program outlined in agenda item 2A1. Voting against it will not immediately accelerate the maintenance of ditches such as the one above. However, in principle and in the long run, it should help if the City and County treat neighborhoods equitably and partisan politics don’t intervene.

Posted by Bob Rehak on 4/26/2020 with thanks to Rick Beaubien

971 Days since Hurricane Harvey

SJRA Starts Seasonal Release to Lower Lake Conroe

After the Easter weekend, the San Jacinto River Authority (SJRA) started its seasonal-release plan. The river authority is currently releasing at a rate of 529 cubic feet per second (CFS) from Lake Conroe. At that rate, the lake should reach its target level of 200 feet above sea level by the end of April, according to Jace Houston, general manager of the SJRA.

Seasonal Release from Lake Conroe, 529 cfs from one tainter gate open six inches.
SJRA Seasonal Release on 4/15/2020. One tainter gate open six inches releases a slow, steady stream of 529 cfs. Image courtesy of SJRA.

The slow rate of release avoids flooding downstream property and the lower lake level provides additional capacity in the lake. That additional capacity provides a buffer against flooding for downstream residents.

About Seasonal Lake Lowering Policy

Houston said the River Authority will hold the lake at 200 feet through the end of May, then allow it to reach its normal level for most of the summer.

Lake Conroe actually reached 200.75 feet before SJRA began its seasonal lowering this week. A reduction of .14 feet equates to about one and two-thirds inches of lowering so far.

At 200.75 feet, Lake Conroe was actually above its highest average monthly level for the year, which is 200.44 feet in May. The normal level for April is 200.32 feet.

Lake Conroe seasonal levels by month. From SJRA board presentation by Chuck Gilman in January.

Earlier this year, a bitter fight broke out between upstream and downstream property owners over the seasonal lake lowering policy. The SJRA board decided to extend the lake lowering plan, but modify it. In the fall, they will let the City of Houston, which owns two-thirds of the water in the lake, decide whether to take the lake down below 199.5 feet.

The extra lowering in the fall helps protect against hurricanes and tropical storms, such as Harvey and Imelda. The SJRA begins slowly lowering the lake in August for the peak of hurricane season in September and then letting it resume its normal level again in October. For the exact details of the policy adopted by the board in its February meeting, click here.

Lake Houston Level Declining

Despite the start of the seasonal release and last week’s rains, the level of Lake Houston has declined this week. And rivers are far from flooding.

Normal level for Lake Houston is 42.5 feet, but City is still lowering lake for spillway maintenance.

Uncertain Weather for This Weekend

Jeff Lindner, Harris County meteorologist, predicts that storms this weekend could bring several inches of rain. “With the Gulf of Mexico water temperatures running several degrees above average for this time of year, winds blowing off the Gulf will need little time to supply a rich moisture-laden air mass.” 

The NWS predicts a 30-40% chance of showers and thunderstorms for this weekend as a front passes. However, Lindner notes, models diverge widely in their predictions. The Global Forecast System (GFS model) predicts that most rain will happen over the Gulf with little impact to land.

However, the European Medium Range Forecast Model (ECMWF) predicts a very wet weekend with several rounds of storms and several inches of rainfall for much of southeast Texas.

Which Model is Better?

ECMWF is considered one of the premiere global forecasting models for the mid-latitudes. Statistically, it has been more accurate than the GFS model.

NOAA has tripled spending on supercomputing capacity to make GFS the best model in the world again.

Posted by Bob Rehak on 4/15/2020

960 Days after Hurricane Harvey

Bruce Sprague’s Hurricane Harvey Story, Part VI

I have known Bruce Sprague for 30 years. He has always been a contributor. He flew cargo planes in Vietnam back in the 1970s and was honorably discharged from the Air Force as a Major. Then he captained commercial planes for Continental Airlines. Most recently, he taught military pilots how to transition to commercial aircraft. Like most pilots who live to the age of 73, Bruce follows procedures religiously and always has backup plans to his backup plans. But lately, life has dealt him a series of blows that have left him flying on fumes with only one engine.

While in the US Air Force and USAF Reserves from 1970 thru 1984, Sprague flew C5s all over the world.
Bruce Sprague flew for Continental Airlines from 1978 thru 2006.  Here is his most famous passenger in 2001, right after the terrorist attacks. Bruce is the pilot standing next to George Bush.

In 2006, at age 60, FAA regulations forced him to retire from flying. Then in 2008, the financial crisis wiped out a large part of his retirement savings. Next, in 2017, he flooded from Hurricane Harvey. Then the Texas General Land Office (GLO) denied him a grant under the Homeowner Assistance Program (HoAP) because he had already taken out an SBA loan. And most recently, he lost his teaching gig when the airline industry went into a tailspin due to the corona virus; no new pilots needed!

So now, Bruce is trying to regain altitude by appealing the grant rejection, but the GLO is still stalling him.

This is the story of a man who has been 1) forced out, 2) wiped out, 3) flooded out, 4) ruled out and 5) “virused” out.

Despite all that, Bruce has maintained a positive attitude. I’m writing this because he symbolizes, according to a GLO estimate, a thousand other Texans caught in a similar bind.


Waking Up on August 29, 2017, to a Changed Life

Rehak: What happened to you and your home during Harvey?

Sprague: Like most people, we went to bed on the night of August 28th thinking we were safe. But on the morning of the 29th we woke up to find an army of insects marching in front of a what felt like a tidal wave headed toward our house. Soon, the water started creeping in. It eventually reached 25 inches in the house and 30 inches in the garage.

The Sprague Kitchen on the morning of August 29, 2017 during Harvey

Rehak: Did you have flood insurance?

Sprague: No. We are in the 500-year flood plain.

Rehak: What happened next?

Reconstruction, Loans and Grant: Start of Even Bigger Problem

Sprague: Luckily, our son in law is in a business that regularly uses lots of contractors. He got people repairing our home right away. And they only charged us cost. No markup. That was the good news. But because of financial losses in 2008, we still had a mortgage and less in our retirement fund than I planned. So we applied for an SBA loan. And they loaned us about $90,000. We also got about $30,000 of individual assistance from FEMA. But the repairs cost $130,000 and that didn’t include contents and replacement of two cars. At any rate, we were able to get back in our house by Christmas, which was close to a record.

Tearing out wallboard, insulation, cabinets and flooring.

Rehak: Some time later, HUD Homeowner Assistance grants became available and you applied for one. Did you see anything in the fine print to cause you concern?

Sprague: Yes, there was a clause called “Duplication of Benefits.” It said that if we had taken an SBA loan, we would not be eligible for the grant.

Rehak: Did you ask about that?

Sprague: Yes, the person at the City who processed our application for the General Land Office said that would not be a problem. “Not to worry about it,” she said.

Rehak: So you applied?

Sprague: Yes. We went thru a year long process to fill out forms. We made multiple visits to the HoAP offices, and many, many phone calls and emails.

Loan With Interest Classified Like Grant

Rehak: What happened?

Sprague: They denied us.

Rehak: Why?

Sprague: Duplication of benefits.

Rehak: How is a loan that you have to pay back with interest a “benefit”?

Sprague: Those are their rules. But that wasn’t our only problem. Even though we had receipts totaling $130,000 for repairs, and even though most other people in the neighborhood paid more than $200,000 to repair their homes, the City inspector estimated we only had about $105,000 worth of damage. That reduced the amount of any potential grant.

Not Following Katrina Model

Rehak: When people hear the words “duplication of benefits,” it conjures up images of double dipping and fraud.

Sprague: Right. Had we applied for GRANTS that totaled more than we paid, I would agree with that. But a loan is not a grant. You have to pay it back…with interest. So you’re not defrauding the government unless you default on the loan. Look at it this way.

We had way more in repair costs than the total of our loans and grant. And they’re not even considering a homeowner assistance grant.

That’s just not fair. A lot of people think that, not just me. After Katrina, they allowed people in New Orleans to pay down their SBA loans with homeowner assistance grants. It was NOT considered a duplication of benefits then!

Rehak: So, what did you do next? You’ve worked in and around government for decades.

Crenshaw Rallies Support in Congress and With Trump

Sprague: I went to Congressman Dan Crenshaw. He and his staff have been terrific. He got ten other members of Congress to send a letter to President Trump explaining that SBA loans should not be considered a duplication of benefits. That was not Congress’ intent. Trump agreed and had HUD-leader Ben Carson publish new guidance for duplication of benefits for Harvey. [See Section VB2 on page 28841 of Federal Register.]

But the Texas General Land Office, which was overseeing the distribution of these funds in Texas, still has not changed their rules. They said the new guidance came “too late.” They also said they didn’t have enough money to make grants to people who also had loans. So, Crenshaw pushed an additional $45 million appropriation through Congress.

Rehak: Where does that stand now?

The belongings of a lifetime on the curb for looters and garbage men to take. Sprague lives in a one-story house.

Appropriations Bill Stalled In Senate Due to Virus

Sprague: It stalled in the Senate because everyone is focusing on corona virus now. The GLO has not changed its position. They say that even though Congress and the President have clarified their position, “the rules came too late.”

Rehak: That leaves you in limbo. And you’re dealing with two disasters now: Harvey and the virus.

Sprague: I understand that people are just doing their jobs, that they have rules to deal with, and they’re trying to prevent fraud. But it sure is frustrating when the President tells someone in his chain of command, “This is how I and Congress want this to work,” and then people down the line don’t follow instructions.

Rehak: Are you holding out much hope for a grant at this point?

Sprague: No time soon. It’s been more than two and a half years since Harvey. When natural disasters destroy people’s lives and homes, they need help right away, not three or four years later.

Hoping Appeals Last Long Enough

Rehak: Have you appealed?

Sprague: Yes. We’re on our second appeal. Three appeals are possible. We’re hoping we can keep this going long enough for Crenshaw’s appropriations bill to get some traction in the Senate and for the GLO to revise its rules.

Rehak: Is there any hope in the Senate? Have you approached Cruz or Cornyn?

Sprague: I’ve gotten some nice form letters back from them saying they are “working for all Texans.”

Rehak: What do you hope for at this point?

Sprague: I just hope we survive corona so our heirs don’t inherit a mountain of debt with our house. Until now, I’ve never asked anything from my government. I hope just this once they come through.

Posted by Bob Rehak on 4/4/2020

949 days after Hurricane Harvey

Note: This report for the Congressional Research Service describes issues with the Duplication of Benefits provision.

City Completes Repairs on Tree Lane Bridge, But Concerns Remain

The City of Houston has completed repairs on the Tree Lane Bridge over Ben’s Branch…at least for now. The City partially concreted a wing wall and placed riprap in the stream bed to help reduce erosion and scour. However, the root cause of the damage remains. Upstream development without adequate detention is funneling more and more water into Ben’s Branch. The higher volume will continue to contribute to scouring and erosion in major storms unless detention ponds upstream are built and fixed.

Water Under the Bridge

As I struggled to understand what I was looking at, an online search revealed this excellent 196-page, well-illustrated document. It’s titled “AN ILLUSTRATED GUIDE FOR MONITORING AND PROTECTING BRIDGE WATERWAYS AGAINST SCOUR.” Robert Ettema, Tatsuaki Nakato, and Marian Muste from the College of Engineering at the University of Iowa produced it for the Iowa Department of Transportation.

It begins with a maxim: “Person who overlooks water under bridge will find bridge under water.”

The document points out that bridge engineers often assume that a stream channel will maintain its course and dimensions. But most channels adjust their alignment and shape in response to floods and land-use changes in their watersheds. That has happened on Ben’s Branch in recent years.

“Channel changes sometimes have severe consequences for bridge waterways,” say the authors.

Scour and Progressive Degradation

A review of the entire paper reveals two types of destructive forces at work on the Tree Lane Bridge.

Long-term scour is one. It occurs over a time scale of several years, and usually includes progressive degradation and lateral bank erosion due to channel widening or meander migration.

Progressive degradation is another. It features the almost permanent lowering of the river bed at a bridge site owing to changes in the watershed [e.g., head-cut progression (head-cutting), or human activities (e.g., channel straightening or urbanization)]. 

The area around the Tree Lane bridge supports has been badly eroding for years. A 12-inch water line that was once buried 5 feet below the stream bed is now at the water surface. See below.

How the area downstream from the bridge looked in December before repairs started.

Scour and erosion under and around bridges are constant problems for engineers. This bridge is a great example. Any time a structure interrupts the flow of floodwater, it creates turbulence (vortices in the flow) that can lead to erosion.

From “AN ILLUSTRATED GUIDE FOR MONITORING AND PROTECTING BRIDGE WATERWAYS AGAINST SCOUR.”

During Harvey, scour destabilized the Union Pacific and US59 bridges across the West Fork. Both had to be replaced for safety.

The Tree Lane Bridge doesn’t appear to be to that point yet. But the heavier load placed on Ben’s Branch by new upstream developments, such as Woodridge Village, Woodridge Forest, and Brooklyn Trails, may be pushing this bridge beyond its design capacity.

Source: FEMA. Bridge constricts water flow (from top to bottom). The pressure of water stacking up behind the bridge forces the water to accelerate under the bridge, causing erosion and scour. See below.
Major storms in the last four years have eroded a large area immediately downstream from the bridge.

Concrete and Rip Rap Should Help in Short Term

To address these problems, the City repaired part of a concrete wing wall. They also placed riprap (boulders) downstream from the bridge and below a stormwater drain.

Riprap breaks up the flow of water and slows it down. This reduces erosion and scour.

Partially concreted wall (left) and riprap at Tree Lane Bridge over Ben’s Branch, Kingwood, TX. Photo courtesy of COH Public Works.
Tree Lane Bridge repairs, Kingwood, TX.
Tree Lane Bridge repairs, Kingwood, TX. Photo courtesy of COH Public Works.

…But Root Causes for Damage Remain

However, problems remain, both here and upstream.

  • That 12-inch water line could be taken out in the next flood by a tree flowing downstream. If the flood lasts for several days as it did during Harvey, the loss of water would be a major inconvenience to the residents of Bear Branch.
  • Inadequate detention upstream will continue to erode both the stream banks and bed at accelerating rates.

Until we can address the root causes of such damage, I fear that maintenance on this bridge will be a constant, long-term issue…despite the City’s best intentions.

Slabs of concrete still lean against water main.
In extreme event, water could still get behind concrete repair and peel it away from bank.

Posted by Bob Rehak on 3/31/2020

945 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.

Tree Lane Bridge over Ben’s Branch: Before and After Repairs

Yesterday, I posted about the hidden costs of flooding. Here’s another one: infrastructure repairs. And another one: re-doing infrastructure repairs. Like those to the Tree Lane Bridge over Ben’s Branch.

History of Issue

Upstream development in Montgomery County with insufficient and un-repaired detention pond capacity started dumping excess water into Ben’s Branch. It didn’t take long for the area under the Tree Lane bridge next to Bear Branch Elementary to start eroding badly.

Tree Lane was already a pinch point in the Ben’s Branch floodway. That and the combination of even more water during the Tax Day, Memorial Day, Harvey, May 2019, and Imelda floods all took a toll. The picture below shows what the bridge looked like on December 1, 2019. Hundreds of kids cross this bridge on their way to Bear Branch Elementary every day.

The Before Shot: Taken November 31, 2019

After taking the shot above, I emailed it to the City. To their credit, they sent crews out right away to repair it. Heavy equipment sat at the site for 2.5 months.

After the Repairs

About two weeks ago, the last piece left the job site. So today, I drove by to get an “after” shot. See the improvements below.

The After Shot: Taken 2/29/2020, three months later.

The City put rip rap across the creek to reduce erosion from water shooting out from the storm sewer in the upper right. They also broke up some of the large slabs of concrete to form additional rip rap.

However, it appears that they:

  • Have done little to stabilize the bridge supports.
  • Left slabs of concrete leaning against an exposed pipeline.
  • Threw a traffic sign and traffic cone into the creek.
  • Left about 50 bags of sand on the large slab at the left.

Someone else could have dumped the construction materials and sign. Crappy looking areas always encourage illegal dumping.

Enlargement of detail from previous shot showing sand that has been left behind or dumped.

I’m guessing that the rip rap may help reduce erosion from the storm sewer. But…

I see little here to stop erosion from upstream of Tree Lane or reduce danger to the pipeline. More important, the City did nothing to increase conveyance under the bridge.

The Tree Lane Bridge still forms a pinch point that restricts conveyance of Ben’s Branch.

Of course, the City may handle the conveyance issue in a second job. That could help build a case for doubling those drainage fees.

Posted by Bob Rehak on 2/29/2020

914 Days after Hurricane Harvey

Exact Text of Lake Lowering Policy Adopted by SJRA

This morning, the San Jacinto River Authority put out a press release about the seasonal lowering of Lake Conroe. I reported the results of the board vote last Friday. The elements of the policy in this press release do not differ. Regardless, I’m printing this press release verbatim for two reasons: a) its the official version, and b) I want the historical record to be complete. I have four comments on the official wording below the release.

Kingwood Town Center Apartments after Lake Conroe release during Harvey. For reference, that’s the roof of an SUV in the foreground and the Town Center Apartments are more than a mile from the river.

SJRA Board of Directors Recommends Renewing Flood Mitigation Strategy

Conroe, Texas—San Jacinto River Authority (SJRA) Board of Directors last week approved a recommendation to the City of Houston (COH) to continue a temporary flood mitigation program at Lake Conroe. The board’s vote proposed extending the initiative through December 2022 and serves as a recommendation to the City of Houston who owns the majority of the water rights in Lake Conroe.

At the special board meeting, over 100 constituents voiced their opinions on the initiative to reduce water level in Lake Conroe on a seasonal basis to create extra capacity to catch rainfall and storm water runoff. During the meeting SJRA Director of Water Resources and Flood Management, Chuck Gilman, gave a presentation to the board that included 20 years of rainfall and lake level data for consideration. 

After approximately five hours of presentation, public comment, and board discussion, the SJRA Board of Directors approved the following recommendation to the COH regarding the operation of Lake Conroe:

  • Spring strategy: Beginning April 1, release only an amount of water from Lake Conroe to create a one foot capacity to catch rainfall and storm runoff (from 201’ mean sea level to 200’ msl). Recapture of lake level beginning June 1.
  • Fall strategy: Beginning August 1, release only an amount of water from Lake Conroe to create a one foot capacity to catch rainfall and storm runoff (from 201’ msl to 200’ msl). After September 1, increase capacity an additional six inches (from 200’ msl to 199.5’ msl). If a named storm is predicted to impact our region, the COH may initiate an additional release of six inches (to 199’ msl) by notifying SJRA in writing of their call for release. Recapture beginning October 1.
  • All releases come from the COH’s 2/3 share of permitted water supply in Lake Conroe at the city’s request. SJRA staff to coordinate with COH staff on the details and timing of any releases.
  • If the lake level of Lake Conroe has already dropped to the target elevation due to natural evaporation, no releases should be made. 

The strategy of temporarily creating capacity in Lake Conroe on a seasonal basis began in 2018 to provide flood mitigation benefits for regional downstream constituents in both Montgomery County and Harris County by catching rainfall and runoff in Lake Conroe. 

The COH supports the strategy. Mayor Sylvester Turner notified SJRA the day before the special board meeting that the city wished to extend the initiative until the completion of additional dredging and construction of flood gates on the Lake Houston Spillway.

Lake Conroe was built in the 1970s as a partnership between COH, SJRA, and the Texas Water Development Board as a water supply reservoir for the region. COH owns 2/3 of the water rights in Lake Conroe; SJRA owns 1/3. The City of Houston may call for the release of water from Lake Conroe for the city’s use at any time. Upon release, the city’s water flows down the west fork of the San Jacinto River eventually ending up in Lake Houston for use by Houston.

One of the major river authorities in Texas, SJRA’s mission is to develop, conserve, and protect the water resources of the San Jacinto River basin. Covering all or part of seven counties, the organization’s jurisdiction includes the entire San Jacinto River watershed, excluding Harris County. For additional information on SJRA visit our website at www.sjra.net, like SJRA on Facebook@SanJacintoRiverAuthority, follow us on Twitter @SJRA_1937, or find us on Instagram @sanjacintoriverauthoritysjra.


Observations about Curious Wording Within the Release

I found several things interesting about nuances of the language in this press release.

First, the headline talks about renewing the lake lowering policy, not modifying, tweaking, changing, or revising it.

Second, they characterize what they did as a recommendation to the City of Houston, as if it is not the policy that they officially adopted over the City of Houston’s recommendation.

Third, they omitted mention of the difference between the City’s recommendation and the SJRA’s.

Fourth, they omitted any mention of affected residents who live outside of the City, but inside the West Fork watershed. For instance, approximately a dozen residents testified from River Plantation on behalf of the hundreds who flooded there. Woodloch and other Montgomery County communities upstream from the Lake Houston area also experienced severe flooding. More than 1100 homes on the West Fork flooded during Harvey between Kingwood and Lake Conroe.

Fifth, in the last paragraph, the SJRA omitted flood prevention in the boilerplate about their mission! Their enabling legislation clearly included it. The governor recently reconfirmed it. And it was the reason for months of debate that consumed two communities. While the omission may seem trivial, it speaks of an entrenched attitude. I trust the State Sunset Commission will consider that during its review of the SJRA’s performance this year.

Posted By Bob Rehak on 2/26/2020

911 Days after Hurricane Harvey

Forest Cove Townhome Buyouts 80% Complete, But Area Now Magnet For Illegal Dumping

Eighty percent of the Forest Cove townhomes south of Hamblen on Marina and Timberline Drives have been bought out so far. But while HCFCD scrambles to complete the remainder of the buyouts, the area has become a magnet for illegal dumpers.

Vacant Since Harvey

Ever since Hurricane Harvey when 15-20 feet of water swept through the riverfront townhomes, they have been abandoned. Then they were looted, burned, covered with graffiti, and dumped on. No one lives there anymore. They can’t. The Harvey flood destroyed them beyond repair.

The absence of residents has now made the once-proud townhomes a favorite destination for illegal dumpers.

Pictures from February 13 Flyover

Below are some pictures I took from a helicopter on 2/13/2020. Believe me, it looks and smells much worse from the ground. People have dumped old furniture, electronics, a boat, tires, landscaping debris, mattresses and more.

The City can’t keep up with it.

Fire from last July.

Status of Buyouts

The City of Houston is responsible for keeping the area clean. But Harris County Flood Control District HCFCD is buying these properties out.

Matt Zeve, Deputy Executive Director of HCFCD, says HCFCD has purchased 80% of the townhomes since Harvey. Fourteen units remain un-purchased. 

HCFCD has already demolished eight of the buildings. Seven remain. The 14 units are scattered among those seven buildings. That’s why they haven’t been demolished yet.

Of the 14 units, five are in the acquisition process. The nine remaining owners have all volunteered to be bought out. “We’re in the approval process of adding them to our Hazard Mitigation Grant Program (HMGP) buyout grant,” said James Wade of HCFCD. So all the pieces of this puzzle are falling into place.

A FEMA Hazard Mitigation Grant Program (HMGP) resulting from Hurricane Harvey is partially funding this acquisition. Seventy-five percent of the cost is from a federal HMGP grant and 25% (plus some relocation costs) will be funded by HCFCD. The total estimated costs of the townhomes once complete: approximately $5 million. 

HCFCD hopes to complete all acquisition and demolition by the end of 2020.

When buyouts are complete, this area will revert to nature. It could also become part of a linear park. The Houston Parks Board was considering building a hike and bike trail south of Hamblen between the County’s planned Edgewater Park and River Grove Park.

Posted by Bob Rehak on 2/25/2020

910 Days after Hurricane Harvey