Between 1:00 and 3:00 PM on 1/24/23, approximately 3.6 inches of rain fell over Royal Pines in southeast Montgomery County. According to Atlas-14 rainfall tables, that qualifies as a 5-year rainfall event. But floodwaters from White Oak creek approached the edge of the 100-year floodplain. And missing silt fences let sediment escape into the wetlands that border the property.
5-Year Rain
A friend who lives a mile from Royal Pines recorded about 4″ on his rain gage for the full day. A check of nearby rain gages on the Harris County Flood Warning System, showed that the official gage at FM1485 and the San Jacinto East Fork recorded approximately 3.6 inches between 1 and 3 PM today.
Harris County Flood Warning System hyetograph shows approximately 3.6 inches fell in two hours on 1/24/23.
Cross-referencing that rate with NOAA’s Atlas-14 rainfall probability estimates for this area, we can see that 3.6 inches in 2 hours equals a 5-year rain.
NOAA Atlas 14 rainfall probabilities for Lake Houston Area.
100-Year Flood Line
Now let’s look at how close that 5-year rain came to the 100-year flood line. In the construction diagram below, the developer shows the edge of the 100-year flood plain. It’s the dotted line between Zone AE and Zone X. I’ve circled the relevant portion in red.
If you were to project that line toward the lower right, it would roughly parallel the heavy black line that forms the eastern boundary of Country Colony, which you can see in the middle right of the photo below.
Floodwaters from Creek Overflow Royal Pines
The water comes almost to the edge of the floodplain shown in the construction diagram above.
Looking SE across Royal Pines. County Colony in upper right.
That big area filled with water, is a part of White Oak Creek cutting across Royal Pines. Think it’s just standing water? Think again.
The closer shot below shows water streaming through the soon-to-be subdivision and filling the Country Colony drainage ditch to overflowing.
Notice the water streaming through the cleared area and carrying away sediment downstream.
Notice also how the floodwaters approach what appears to be some sort of water treatment facility in the upper right.
These shots also document the absence of silt fence on the eastern side of Royal Pines.
All that silt will migrate down White Oak Creek and Caney Creek into the East Fork San Jacinto which the City of Houston just dredged at great public expense. The public also must foot the bill for increased water-purification costs.
More Missing Silt Fence in NW Corner of Royal Pines
The SE corner of Royal Pines wasn’t the only part of the development missing silt fence. The developer removed it from the NW corner – where a neighbor has now flooded three times in two months.
Looking N toward White Oak Creek. Contractors removed the silt fence last week. Rain then swept sediment into the woods.
Those woods contain sensitive wetlands.
Notice how water coming from the north (left) is clear. But water coming from Royal Pines (right) is filled with sediment.The muck filled the wetlands for more than a mile downstream.
How Can a 5-Year Rain Reach Almost as Far as a 100-Year Floodplain?
We need an answer to that question before this development starts pouring concrete. There are several possible explanations.
Clearcutting accelerated runoff.
Bulldozers compacted soil, limiting the rate of infiltration.
The developer hasn’t built any stormwater-detention-basin capacity to offset the increased runoff.
Planners used old (lower) Montgomery County rainfall data to determine the extent of the floodplain in their plats and plans.
Engineers didn’t count on the cumulative impact of insufficiently mitigated upstream development, some of which used beat-the-peak, hydrologic-timing surveys to avoid building detention basins.
More rain fell upstream than at the gage shown above.
Some or all of the above.
I took these photos within an hour of the end of the rain. So there wasn’t much time for water to work its way downstream very far.
Two floodplain experts I consulted pointed to the cumulative impact of upstream development as a possible culprit. Engineers are likely working with flood data acquired in the 1980s before Montgomery County became one of the fastest growing counties in the region. The data is simply too complex to adjust after each new development. So, it never gets revised and errors compound over time.
I’m sure the Montgomery County Engineers Office and TCEQ will want to get to the bottom of this before the developer starts building homes. If homebuyers flood on rains that are far less than 100-year rains, tremendous liabilities could result.
If Royal Pines or Montgomery County would like to rebut the issues I’ve raised, I will be happy to publish their point of view. The public deserves to know what’s going on.
Posted by Bob Rehak on 1/25/23
1975 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/2023/01/20230124-DJI_0738.jpg?fit=1200%2C799&ssl=17991200adminadmin2023-01-25 11:21:142023-01-25 15:48:255-Year Rain Brings White Oak Creek Close to 100-Year Mark in Royal Pines
In March, Community Impact reported the facility would open this year, but did not specify a date. Amazon said it was one of four such facilities opening in the Houston area this year. “The station will bring in about 300 full-time jobs paying $15 as a starting hourly wage,” said Community Impact.
Amazon Transportation Facility at Valley Ranch as of 11/6/2021. Looking NNW from the SE corner. I-69 intersects Grand Parkway in upper right.
According to Amazon’s plans, those brownish grassy areas between the parking lots are wetlands they are trying to preserve.
Looking SW from over White Oak Creek from NE corner of property.
The site has two large detention ponds on the left and in the foreground to help slow down all that runoff from the acres of concrete.
Looking S from over I-69 (right).
Proximity to Bush Intercontinental Airport, US59 and the Grand Parkway make this location an ideal transportation hub.
Looking NE. I-69 in lower left.
Development in this area is exploding. While photographing this site today, I noticed three other sites on the west side of I-69 clearing ground. Developers are excavating detention ponds and building has just begun. More on those soon.
Posted by Bob Rehak on 11/7/2021
1531 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2021/11/20211106-DJI_0755.jpg?fit=1200%2C799&ssl=17991200adminadmin2021-11-06 19:53:352021-11-06 19:56:36Amazon Transportation Center at Valley Ranch Nears Completion
The Valley Ranch area in Porter near US 59 and SH 99 is developing rapidly these days. Signorelli Company calls Montgomery County the 18th fastest growing county in the US.
Medical Plaza Site Cleared
The developer has just cleared a 200+ acre site for a medical plaza in this area. Signorelli’s website says, “Envisioned as the ‘place of wellness’ for the region, the Medical District is a visionary mixed-use concept blending healthcare with restaurants, specialty services, hotels, and high-density residential, providing a broad range of health care services, from primary physicians to acute care and every specialist in between.”
Looking SW across US 59 in foreground. Photo taken on 5/3/21 after three inches of rain on April 30 and May 1. This area drains into the White Oak Creek Watershed.
Detention ponds, both in this picture and the developer’s website seem to be planned for the area back from the freeway.Photo taken 5/3/2021.
The Montgomery County Engineer’s office says it does not yet have construction, drainage plans, or an H&H analysis specifically for the medical plaza property. In response to my FOIA Request, the engineer’s office said, “This is all we have on file at this time.” Their drainage mitigation study they sent me was produced in 2014, long before Atlas 14. That means its runoff calculations are likely 40% short of the current standard. The study also does not isolate this portion of the overall development.
It’s unclear at this time whether Signorelli is planning to update its drainage mitigation study and incorporate Atlas-14 standards into its medical plaza drainage.
Amazon Distribution Complex Across Freeway
Right across the freeway from the Valley Ranch medical plaza, Amazon is building a distribution complex.
That green area that snakes its way across 99 and then 59 from the top left to upper right is White Oak Creek. White Oak runs southeast through Porter then joins Taylor Gully and Mills Branch south of the Triple PG Sand Mine near Woodstream Forest. Ultimately, it joins Caney Creek near Dunnam Place and then the East Fork of the San Jacinto. See below.
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/2021/05/20210503-DJI_0680.jpg?fit=1200%2C900&ssl=19001200adminadmin2021-05-10 21:48:222021-05-10 21:55:08Valley Ranch Med Plaza and Shipping Complexes Planned
Triple P.G. Sand Development LLC appears to have violated provisions of an injunction by dredging before its trail and flooding neighboring properties with industrial waste water.
In part, the injunction stipulated that the defendant shall:
Not conduct any dredging operations at the Facility.
Not engage in any operations at its Facility that discharge process wastewater, nor shall Defendant engage in any operations at the Facility that produce process wastewater that must be discharged off Defendant’s property without express prior approval from TCEQ.
Immediately and permanently cease and prevent all discharges of any Industrial Waste and/or Process Wastewater from the Facility into or adjacent to waters in the state.
Not allow any discharge of water that is in or has ever been in the Facility’s Dredge Ponds without the express prior approval of TCEQ.
Aerial Photos Show Potential Violations
The aerial photos below show that within eight days of agreeing to the injunction, the mine started pumping process wastewater OVER BERMS into a pit that then overflowed onto the property of adjoining landowners and lands adjacent to White Oak Creek.
Before showing you the photos, let me show you a satellite image that helps illustrate the relationship between the different elements of this report.
Overview of mine, area drainage and adjoining properties in Montgomery County. Note the location of the mine’s stockpile in the satellite photo above for orientation when viewing the photos below. Brownish creek to right of mine is Caney Creek. Blue line shows approximate path of White Oak Creek through forest. Red oval shows adjoining properties in area of interest. Solid red line shows ditch around perimeter of mine. Green lines show approximate locations of breaches in Attorney General’s lawsuit.
Water pumped out of the mine’s wastewater pond is now flooding neighboring properties within the red oval that he does not own. The mine also dug a ditch around the perimeter of its property (solid red line) through dense forest that channels the process wastewater toward White Oak Creek (solid blue line) and the wetlands along it. It’s not clear, though, whether the wastewater has actually entered the creek yet; the forest canopy limits visibility. Regardless, the injunction says they can’t discharge waste adjacent to waters of the state.
No Flooding That Lasted Months of Adjoining Properties Until Injunction
None of the historical satellite images in Google Earth dating back to 1989 show flooding in the red oval. Some of the properties in the red oval lie in the 100-year flood plain. However, there has been no widespread flooding in this area since Imelda on September 19, 2019.
Nor has there been prolonged flooding as far as I can determine. Photos taken of this exact location on 9/27/2019, ten days after Imelda, show no flooding of the adjacent properties. Likewise, the property was not flooded on 9/14/2017, two weeks after Harvey. I can find no evidence that this area has ever flooded for months before.
Looking south toward stockpile in background. Properties in the forested strip do not belong to Guniganti. On 9/27/2019, ten days after Imelda, they showed no flooding.
For months, I’ve been watching waste water build higher and higher in the area above until it overflowed the pit and invaded neighboring properties. That made me curious and prompted a review of thousands of aerial photos. Here’s what I found.
Photos Taken In November Before Injunction Show Neighboring Land Still Not Flooded
The neighboring properties were NOT flooded on November 4, 2019 (before the injunction). Notice the level of water in the foreground pit – higher than after Imelda, but still waaaay short of overflowing.
Think of the November 4th photo below as the “before” shot. Compare it with other photos below taken from December through March 2020.
Properties in the red oval are between the pit in the foreground and stockpile in background. Note level of water in pit.Photo taken November 4, 2019, looking south.The mine’s process waste water enters the pit immediately to the left of the trees.
After Injunction, Mine Starts PUMPING Waste Water OVER Dike
Eight days AFTER the injunction, on December 3, 2019, I flew over the mine again. I noticed that the mine was pumping water out of its main waste water pond and into the pit in the photo above. But the pit had not yet overflowed. Here’s how the pumping looked. (Note: You can even see the pumping from outer space if you zoom in on this area within Google Earth and look at the Dec. 1 satellite image.)
Close up of pump taken on 12/3/2019. The pumping operation can also be seen in Google Earth satellite photo dated 12/1/19.
On January 20, Pumping Continues From Different Location
I flew over the mine again on January 20, 2020; the pumping from and into the same pits continued – but from a different location.
Looking West. Notice the line running from the arc in the wastewater pond (diagonally from center to lower right).Looking south. The same line dumps water into the trench (bottom left). The trench then carries the water south (toward the top of the frame) to fill the pond next to the stockpile and flood adjoining properties with waste water.Looking SE. Here’s what it looked like closer up. Notice the waste water extending into the tree line and ending at the stockpile (upper right). The same pond that had plenty of excess capacity in September and November was now overflowing.Looking south. This wider shot shows the flooding wastewater curled around the stockpile and headed south into the woods where White Oak Creek flows toward the mine.Looking SE. Close up of the waste water turning the corner around the stockpile.
From where you lose visibility of the ditch under the forest canopy to White Oak Creek is about 80 yards according to Google Earth.
Floodwaters Even Higher on February 13
On my February 13, 2020, overflight, I captured the following images. They show the floodwater had risen even higher and backed up farther.
Looking SW. On February 13th, the flooding wastewater appeared even higher.Looking SE.It still curled down the ditch on the west (right) side of the mine and flowed into the woodstoward White Oak Creek
Water backed up so far, it even flowed into the utility corridor at the north end of the mine.
Looking East.Water in utility corridor at north end of mineon February 13, 2020
In March, Possible Dredging Observed, Still Flooding Neighboring Properties
In March, one of the first things I noticed was the dredge. The cutterhead, which had been elevated for months, was now DOWN. That usually indicates the dredge is working. And that’s something the injunction prohibited.
Dredge with its cutter head down usually means active dredging.
The pond next to the waste water pit overflowed onto neighboring properties even more. It came right up to the road. Note the huge difference between the levels of the two ponds below.
Note how high the water level is in the pond at the top of the frame compared to the waste pit at the bottom. Looking SW. Floodwaters stretch into adjoining properties. Stockpile is behind trees in upper left.Looking SE. Floodwater still fills the ditch running south along west side of stockpile.Looking NW at wastewater flooding adjoining properties.Stockpile is in lower left.Looking SE. Adjoining properties are in tree strip in front of stockpile. Notice waste water among the trees.Looking north from over stockpile toward vast areaflooded with waste water.Looking west. Even more of utility corridor is flooded in March.
Water In, Water Out
Miners use water to clean silt out of the sand before shipment. Note the damp sand coming off the conveyor belts.Looking south. A river of waste water is seen leaving the processing equipment on March 6, 2020.Looking NW. The silt-laden waste water even forms a delta in the waste pit. Flooded properties are on the other side of the road that cuts diagonally through the frame from middle left to upper right.
So water is leaving the processing equipment and going into the waste pit. It has to come in from somewhere. But where? As you can see from the photos below, the supply lines for the processing equipment come from the dredge pond.
Looking west. Water goes into the processing equipment from the dredge pond.Looking North. Wide shot showing dredge with cutterhead down and discharge pipe leading back to shore.
In the shot above, you can see that the lowest pond in the whole operation is the pond receiving ALL the waste water. Why is that?
The Big Questions and Some Possible Answers
So it appears that the mine is pumping water out of the dredge pit, into the waste pit, and finally into the surrounding forest. The big questions are these.
Why is the mine keeping the level of the water in the waste pit so low?
Why is the mine flooding the surrounding forest and neighboring properties with industrial waste water?
Is the waste water polluting White Oak Creek?
To hypothesize some answers to those questions, let’s look at two pictures: the first from February and the second from March.
Looking south. February 20, 2020. Miners have been removing sand from area with all the tracks in the center and the big pond at the lower left.
From this one photo, we can see that to avoid dredging (per the injunction), the miners have started surface mining. But the level of mining is getting down to a) the water table, and b) the level of the waste pit.
Looking NW. March 6, 2020. Three weeks later, mining is now BELOW level of water in the waste pit.
Note the differing levels of water in the forest (top) and waste pit (middle). Also note that the level of the surface mining has now gone far below the level of sediment in the waste pond.
From this photo (and others in the series) we can conjecture what happened. Please note: I have no proof of this. It is only conjecture.
Theory for the Discharge
I suspect that the mine realized that if it were to continue filling orders while it waited for trial on June 22, 2020, it would need to start surface mining AND mine below the level of water in the waste pit. So, I’m guessing they started lowering the level of the pond to keep mining as long as possible.
I’m also guessing that the terms of the injunction and heightened scrutiny by the TCEQ meant they could no longer make excuses about discharging water into the creek. So they discharged into the forest instead…most of which Guniganti owns except for that strip north of the stockpile. If the discharge drained into White Oak Creek deep in the forest, at least it wouldn’t be visible.
Is Discharge Reaching White Oak Creek?
Is the waste-water pollution reaching White Oak Creek? Because of the dense forest canopy, that’s impossible to determine from the air. One could only tell from the ground. And because Guniganti owns all the land around the mine (except for the properties in the red circle), the only way to determine that would be by trespassing. That makes it impossible for ordinary citizens to spot any illegal discharge, such as Tony Buzbee did when he was running for Mayor of Houston. Fortunately, the TCEQ has the right to inspect the property from the ground if it suspects a violation of the restraining order. And they are investigating this.
Summary of Potential Violations
This whole affair once again raises questions about whether sand mines should be permitted in floodways. This mine actually sits at the confluence of TWO. Which is part of the reason why it was sued by the attorney general in the first place. Both Caney and White Oak Creeks captured the pit last year and the TCEQ estimates millions of gallons of process waste water were discharged without a permit into the headwaters of Lake Houston.
Meanwhile, Triple PG appears to be discharging again without the benefit of storms to blame the behavior on. They also appear to be violating terms of their injunction by:
Dredging
Discharging process wastewater
Producing process wastewater that had to be discharged off their property.
Discharging water that had been in the Facility’s Dredge Ponds.
Discharging Industrial Waste and/or Process Wastewater adjacent to waters of the state (White Oak Creek)
I have contacted the TCEQ twice already about whether they permitted any of these activities. They have not responded yet, citing the ongoing investigation. However, I must believe that had they permitted the activities, they would not be investigating and would have replied immediately. They visited the site yesterday.
Posted by Bob Rehak on March 13, 2020
927 Days after Hurricane Harvey and 176 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.
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