When Elm Grove and North Kingwood Forest flooded on May 7, the Woodridge Village contractor had cleared most of the 268 acres of land north and west of them. The contractor also had sloped the drainage toward those subdivisions without first installing a critical 50 acre-foot detention pond to intercept runoff. Tonight after months of delays, and the flooding of almost 200 homes, work on that pond is almost complete.
S2 Pond Finally Connected to Drainage Ditch Today
Regular readers may remember plans call for a 15-foot deep detention pond shaped somewhat like a hockey stick (see below). The area circled in red is the channel that will connect the pond to the drainage ditch that runs down the east side of the property. Today, some workers excavated that channel while others deepened the pond.
Circled in red: the channel excavated today that will connect the drainage ditch with the detention pond.
Not Much Excavated on May 9
Back on May 9, about a month ago, very little of the pond was excavated when local videographer, Jim Zura, captured this image from his drone. Only a small ditch connected a pond north of Sherwood Trails to the box culvert seen below. The white outline indicates how much of the pond had yet to be excavated.
Almost nothing had been excavatedshortly after the May 7 flood.White outline shows the approximate intended dimension of the pond.
Despite the heavy rains in early May and early June, the contractor now has most of the pond excavated. See the video that Jeff Miller shot this afternoon.
Since the flood, the pond has been widened and deepened. Rebel Contractors is now approaching the pond’s final dimensions and target depth of 15 feet, according to Miller. However, Miller was even more excited about the excavation of the channel connecting the drainage ditch running down the east side of the property to the detention pond. “I’ll be able to sleep with both eyes closed tonight,” he said.
In the future, when runoff drains from the northern part of the property to the southern, it will overflow from the ditch into the pond, rather than into neighbors’ houses.
Recent Excavation Despite Heavy Rains Last Week
The next two shots show what the connecting channel looks like from the ground.
Previously, water in the ditch had to funnel down into the 3′ black culvert (bottom left). This caused the ditch to overflow into surrounding neighborhoods when the ditch got full.Now, however, this channel connects ditch (foreground) and pond (upper left). It will allow runoff to overflow into pond instead of neighbors’ homes.
Bill King Visits Elm Grove Again, Meets Texas Monthly Writer
But that wasn’t the only good news, today. Houston mayoral candidate Bill King visited Elm Grove for the third time in a month and toured the area with Mark Dent, who is covering the story for Texas Monthly.
Bill King (left) and Mark Dent talk about flood mitigation strategies with Taylor Gulley in the background.
King emphasized several needs to Dent. They included:
Greater clarity and accuracy of flood maps, so that people can realistically assess their flood risk
Safer construction practices that better protect downstream residents
Preservation of natural wetlands, buffers and drainage features like those that previously existed on the Woodridge site, and that had protected Elm Grove since it was built.
King emphasized that preserving such natural areas and the wetlands on them can provide both recreation and protection against flooding. Finally, he advocated using buyouts to build more and bigger detention ponds, and also to create more green space.
It’s good to know that King is taking Kingwood issues seriously. He’s making them a centerpiece of his campaign and using them to shine a spotlight on development practices that need improvement in my opinion.
Posted by Bob Rehak on 6/14/2019with help from Jeff Miller
654 Days since Hurricane Harvey, 5 weeks since the Elm Grove Flood, and 4 Months Until the Election
Thoughts expressed in this post represent my opinions on matters of public interest 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/2019/06/Swale_01.jpg?fit=1500%2C1000&ssl=110001500adminadmin2019-06-14 19:41:442019-06-14 19:50:21Critical Woodridge S2 Detention Pond Approaching Final Dimensions
Charles Jones, a Lake Houston Area resident and business man, has developed a presentation that examines the role of the FM1960 bridge in Harvey Flooding. The small openings in the bridge, he says, constrict the flow of floodwaters, much like sand gets pinched and backed up when moving through an hourglass.
The following three slides sum up the heart of Jones’ theory.
Most of the flooding during Harvey happened above the FM1960 bridge on the East and West Forks.The bridge is mostly a causeway. It has two small openings that total 1700 feet.The two openings restrict the flow compared to other bridges and create a backwater effect.
Discussion of FM1960 Theory
Jones’ presentation is a deliberately “high level”, simplified discussion targeted at a general audience. Parts of it seemed a bit OVERsimplified at times.
For instance, at one point he describes the FM1960 bridge as the cause of sediment build up in the mouth bar area on the West Fork. But if that’s the only cause, why isn’t there a similar build up on the East Fork?
Another example: he describes the West Lake Houston Parkway Bridge as 3700 feet in length. That’s true. But so much sand is stacked up on the downstream side of the bridge that it effectively narrows the opening. See sand in the treetops below.
Looking north toward Kingwood’s Kings Harbor. The West Lake Houston Parkway bridge is on the left. Photo taken two weeks after Harvey. In the foreground, sand now reaches the tree tops and is virtually as high as the bridge itself. Water used to flow under the bridge and through the area in the foreground during floods. Now it is forced north.
However, put those observations aside for the moment and ask two simple questions:
Are the principles behind Jones’ theory generally true?
Are there any direct observations available that support the theory?
The answers are yes and yes.
“There’s Always a Bottleneck Somewhere in Every System”
I had a client for 35 years that made plastics. The company was one of the largest and most respected in the business. They built plants around the world. A process engineer in that company, whom I highly respected, once told me, “There’s always a bottleneck somewhere in every system.” The FM1960 bridge is ONE of those bottlenecks.
A Google Earth satellite image taken DURING Harvey shows water swirling above the bridge looking for a way to get downstream. In the photo below, see how the bridge disrupts the different colors in the flow.
Note the different shades of brown near the FM1960 Bridge and how the flow within those colors is disrupted by the bridge, especially by the smaller eastern opening.Satellite image from 8/30/17 DURING Harvey.
So pardon the pun, but I think Jones’ theory holds some water. It certainly merits further investigation. I would certainly like to know the answers to the following questions:
Did someone actually measure the difference between the high water marks on each side of the bridge during Harvey?
If so what was it? Can the backwater effect of the causeway be quantified?
Is there photographic evidence of any difference?
If the backwater effect is significant, how much would it cost to modify the bridge? Would the benefits justify the cost?
Thank you, Mr. Jones, for bringing this matter to the public’s attention. You’ve made a valuable contribution to our understanding of Harvey.
And On a Side Note…
What’s that nasty brown stuff flowing out of Luce Bayou on the upper right in the photo above? At first I thought I might be the shadow of a cloud on that particular day, but it shows up consistently in other photos. See below, for instance. It starts about the time construction on the Luce Bayou project started. That’s the project designed to bring water to Lake Houston from the Trinity River. Mmmmmm!
Satellite image from 12/30/2014 shows purple/brown effluent coming from Luce Bayou.Note the three distinct sediment colors in this photo: light brown in the West Fork on the left, medium brown from the East Fork at the top, and dark brown from Luce Bayou on the right.Most recent Google Earth image from 2/23/19 shows that water coming from Luce Bayou is more normal in coloration now. Construction on the Interbasin Water Transfer Project is required to be complete this month. Let’s hope that’s the last we see of that purple stuff.
Posted by Bob Rehak on 6/14/2019
654 Days After Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/06/Portholes.jpg?fit=1978%2C1396&ssl=113961978adminadmin2019-06-14 08:22:022019-06-14 14:32:28New Presentation Looks at Role of FM1960 Bridge in Harvey Flooding
Harris County Flood Control District (HCFCD) has enhanced its Flood Warning System at www.harriscountyfws.org.
Flood Warning System Enhancements
The system can now provide:
Residents of Harris AND surrounding counties…
The ability to receive CUSTOMIZED water level AND rainfall alerts…
From ANY gage or gages IN THE ENTIRE REGION…
Via TEXT message, EMAIL, or BOTH.
When signing up, consider the gages nearest you plus those upstream. Upstream gages can give you more warning time.
How to Sign Up for Warnings
Sign up for the new flood warning system at www.fwsalerts.org. Create your free account, then customize your preferences. You can request notifications from more than 250 gage locations across the region. Gages are located in or operated by:
Harris County
Brazoria County
Fort Bend County
Montgomery County
Galveston County
Waller County
City of Mont Belvieu
City of Sugar Land
The Woodlands
San Jacinto River Authority
Residents will need to create an account and can then choose which gages they want to receive information from, i.e., those nearest them and those upstream from them. You can create custom alerts for various water levels, channel depths, rainfall intensities, and so forth. You can also default to four standard alerts.
1 inch of rainfall in 15-minutes
4 inches of rainfall in 1 hour
Channel flooding is possible (3 ft below bankfull)
Channel flooding is likely (bankfull)
When defined rainfall or water level values are reached indicating a potential for flooding, the new flood warning system will begin sending alerts that match your preferences.
Response to Harvey
“One of the biggest takeaways from Hurricane Harvey was the need for automated notifications to be delivered in a timely manner. This enhancement will help do that,” stated Jeff Lindner, Director of Hydrologic Operations and Meteorologist for the Flood Control District.
“Residents can use the new alerts feature to make timely, informed decisions on how to protect themselves, their families, and property,” said Lindner.
More Information
HCFCD has optimized the flood warning system for both desktops and mobile phones.
HCFCD encourages residents across the region to establish an account and sign up for alert notifications at www.fwsalerts.org.
Posted by Bob Rehak on 6/13/2019
653 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/06/FWS-Signup.jpg?fit=1500%2C1009&ssl=110091500adminadmin2019-06-13 17:20:242019-06-13 17:20:38Flood Control District Enhances Flood Warning System with Customizable Alerts
Critical Woodridge S2 Detention Pond Approaching Final Dimensions
When Elm Grove and North Kingwood Forest flooded on May 7, the Woodridge Village contractor had cleared most of the 268 acres of land north and west of them. The contractor also had sloped the drainage toward those subdivisions without first installing a critical 50 acre-foot detention pond to intercept runoff. Tonight after months of delays, and the flooding of almost 200 homes, work on that pond is almost complete.
S2 Pond Finally Connected to Drainage Ditch Today
Regular readers may remember plans call for a 15-foot deep detention pond shaped somewhat like a hockey stick (see below). The area circled in red is the channel that will connect the pond to the drainage ditch that runs down the east side of the property. Today, some workers excavated that channel while others deepened the pond.
Not Much Excavated on May 9
Back on May 9, about a month ago, very little of the pond was excavated when local videographer, Jim Zura, captured this image from his drone. Only a small ditch connected a pond north of Sherwood Trails to the box culvert seen below. The white outline indicates how much of the pond had yet to be excavated.
Despite the heavy rains in early May and early June, the contractor now has most of the pond excavated. See the video that Jeff Miller shot this afternoon.
Since the flood, the pond has been widened and deepened. Rebel Contractors is now approaching the pond’s final dimensions and target depth of 15 feet, according to Miller. However, Miller was even more excited about the excavation of the channel connecting the drainage ditch running down the east side of the property to the detention pond. “I’ll be able to sleep with both eyes closed tonight,” he said.
Recent Excavation Despite Heavy Rains Last Week
The next two shots show what the connecting channel looks like from the ground.
Bill King Visits Elm Grove Again, Meets Texas Monthly Writer
But that wasn’t the only good news, today. Houston mayoral candidate Bill King visited Elm Grove for the third time in a month and toured the area with Mark Dent, who is covering the story for Texas Monthly.
King emphasized several needs to Dent. They included:
King emphasized that preserving such natural areas and the wetlands on them can provide both recreation and protection against flooding. Finally, he advocated using buyouts to build more and bigger detention ponds, and also to create more green space.
It’s good to know that King is taking Kingwood issues seriously. He’s making them a centerpiece of his campaign and using them to shine a spotlight on development practices that need improvement in my opinion.
Posted by Bob Rehak on 6/14/2019 with help from Jeff Miller
654 Days since Hurricane Harvey, 5 weeks since the Elm Grove Flood, and 4 Months Until the Election
Thoughts expressed in this post represent my opinions on matters of public interest and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP statute of the great State of Texas.
New Presentation Looks at Role of FM1960 Bridge in Harvey Flooding
Charles Jones, a Lake Houston Area resident and business man, has developed a presentation that examines the role of the FM1960 bridge in Harvey Flooding. The small openings in the bridge, he says, constrict the flow of floodwaters, much like sand gets pinched and backed up when moving through an hourglass.
You can download and review the entire presentation here. It will be stored permanently under the Other Flood Mitigation tab of the Reports page on this web site.
Summary of Jones’ Theory
The following three slides sum up the heart of Jones’ theory.
Discussion of FM1960 Theory
Jones’ presentation is a deliberately “high level”, simplified discussion targeted at a general audience. Parts of it seemed a bit OVERsimplified at times.
For instance, at one point he describes the FM1960 bridge as the cause of sediment build up in the mouth bar area on the West Fork. But if that’s the only cause, why isn’t there a similar build up on the East Fork?
Another example: he describes the West Lake Houston Parkway Bridge as 3700 feet in length. That’s true. But so much sand is stacked up on the downstream side of the bridge that it effectively narrows the opening. See sand in the treetops below.
However, put those observations aside for the moment and ask two simple questions:
The answers are yes and yes.
“There’s Always a Bottleneck Somewhere in Every System”
I had a client for 35 years that made plastics. The company was one of the largest and most respected in the business. They built plants around the world. A process engineer in that company, whom I highly respected, once told me, “There’s always a bottleneck somewhere in every system.” The FM1960 bridge is ONE of those bottlenecks.
Other Support for Theory
But what about the direct observations?
So pardon the pun, but I think Jones’ theory holds some water. It certainly merits further investigation. I would certainly like to know the answers to the following questions:
Thank you, Mr. Jones, for bringing this matter to the public’s attention. You’ve made a valuable contribution to our understanding of Harvey.
And On a Side Note…
What’s that nasty brown stuff flowing out of Luce Bayou on the upper right in the photo above? At first I thought I might be the shadow of a cloud on that particular day, but it shows up consistently in other photos. See below, for instance. It starts about the time construction on the Luce Bayou project started. That’s the project designed to bring water to Lake Houston from the Trinity River. Mmmmmm!
Posted by Bob Rehak on 6/14/2019
654 Days After Hurricane Harvey
Flood Control District Enhances Flood Warning System with Customizable Alerts
Harris County Flood Control District (HCFCD) has enhanced its Flood Warning System at www.harriscountyfws.org.
Flood Warning System Enhancements
The system can now provide:
How to Sign Up for Warnings
Sign up for the new flood warning system at www.fwsalerts.org. Create your free account, then customize your preferences. You can request notifications from more than 250 gage locations across the region. Gages are located in or operated by:
Residents will need to create an account and can then choose which gages they want to receive information from, i.e., those nearest them and those upstream from them. You can create custom alerts for various water levels, channel depths, rainfall intensities, and so forth. You can also default to four standard alerts.
When defined rainfall or water level values are reached indicating a potential for flooding, the new flood warning system will begin sending alerts that match your preferences.
Response to Harvey
“One of the biggest takeaways from Hurricane Harvey was the need for automated notifications to be delivered in a timely manner. This enhancement will help do that,” stated Jeff Lindner, Director of Hydrologic Operations and Meteorologist for the Flood Control District.
“Residents can use the new alerts feature to make timely, informed decisions on how to protect themselves, their families, and property,” said Lindner.
More Information
HCFCD has optimized the flood warning system for both desktops and mobile phones.
For more information, consult this Flood Warning System Brochure or just sign up.
HCFCD encourages residents across the region to establish an account and sign up for alert notifications at www.fwsalerts.org.
Posted by Bob Rehak on 6/13/2019
653 Days since Hurricane Harvey