Starting tonight at 11:59 P.M. and lasting through April 3, 2020, “this Order requires all individuals anywhere in Harris County, to stay at home – except for certain Essential Activities and work to provide Essential Business and Essential Government services or perform essential infrastructure construction, including housing.”
Rustling Elms Bridge over Taylor Gully during peak of May 7, 2019 flood.
Non-essential and prohibited:
All exercise facilities including gyms, swimming pools and martial arts studios must close.
A broad range of retail shops must close including barbers, hair salons, tattoo parlors, bowling alleys, game rooms, massage parlors, malls, flea markets, movie theaters, concert halls and more.
All public and private gatherings occurring outside a single household or living unit are prohibited.
Nursing homes, retirement, and long-term care facilities must prohibit non-essential visitors except for end-of-life visitation or critical assistance.
Restaurants will remain closed except for drive-through and carry-out orders.
Churches may only provide services via video or teleconference.
Essential and still exempt:
Grocery stores
Pharmacies
Gas stations
Convenience stores
Liquor stores
Car dealers and repair facilities
Professional services, such as legal, accounting, insurance, etc.
Flood Control Not On List
The corona virus prohibited and exempted lists stretch for 20 pages. They are too numerous to summarize here. However, as I read through the list, nowhere did I see “flood control” or “flood mitigation” work. That made me wonder whether we had potentially traded one type of crisis for another.
So I reached out to county officials and asked how today’s corona virus order would affect the activities of the Flood Control District. Said another way, were they considered “essential activities.”
Flood Control Deemed Essential, Will Continue
The answer: Yes, Flood Control is considered essential under the infrastructure and construction provisions of the order. No, Harris County Flood Control District (HCFCD) will not shut down mitigation projects.
Matt Zeve, Deputy Executive Director of HCFCD had this to say. “Everyone who can will work from home. We had already been phasing that in before today. All construction and field work will continue as normal…with appropriate social distancing and hygiene procedures of course.”
Moving Into High-Risk Season for Flooding
As we move into April and May, the rainiest months of Spring, that’s comforting. A reader asked me today, “What would happen if we got a flood on top of the corona virus?” My first inclination was to tell her she needs to write the screenplay and go to Hollywood. But then I said, “That’s actually pretty plausible.”
People mucking out houses in unsanitary conditions and tight, crowded spaces could accelerate the spread of the virus. Crowded rescue boats and choppers would make a first responders nightmare, especially when rescuing people with the corona virus. Thousands of evacuees in churches, schools and convention centers. Evacuating high-risk populations like the elderly from nursing homes. These are not pleasant thoughts.
That’s why I’m glad that the work of flood control will continue as normal. Hurricane season is only nine weeks away.
Posted by Bob Rehak on 3/25/2020
939 Days since Hurricane Harvey and 188 since Imelda
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/05/Taylor-Gully-at-Peak-e1728600738227.jpg?fit=1100%2C327&ssl=13271100adminadmin2020-03-24 20:14:102020-03-24 20:14:18Corona Virus Lockdown Expansion Will Not Affect Flood Mitigation
The rain earlier this week continues to filter into Lake Conroe and raise the lake level. As of today at 3 p.m. today, the level reached 200.35 msl (mean feet above sea level).
Lake Conroe level as of 3pm on 3/24/2020
That means the lake level now exceeds the average for April – and there’s still a week left in March. With additional rain or inflow, the lake could soon reach its highest point in an average year.
Monthly variation in average levels of Lake Conroe dating back to 1973 when the dam was built.
The highest monthly average happens in May when the lake reaches 200.44 feet. That means the lake is now 0.09 feet (1.08 inches) from its average annual peak in May.
That also means that the SJRA will begin releasing water on April 1 as part of its seasonal lowering plan to reduce flood risk to downstream communities.
Posted by Bob Rehak on 3/24/2020
938 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/03/Screen-Shot-2020-03-24-at-3.06.55-PM.png?fit=400%2C228&ssl=1228400adminadmin2020-03-24 15:35:362020-03-24 15:44:06Lake Conroe Level Now Exceeds Average for April a Week Early
Montgomery County commissioners will vote Tuesday whether to sue a new sand mine on the west side of the San Jacinto West Fork. The mine is in a Conroe development called Carriage Hills.
Page 1 of the document above says that, “… it appears that MBM Sand Company, LLC and Carl Hudspeth, individually and doing business as Skilled International, LLC have violated, is violating, or is threatening to violate Subchapter I of Chapter 16 of the Tex. Water Code, or one or more rules adopted by Montgomery County under said subchapter and has failed and refused to cease and desist as demanded by the Montgomery County Engineer and/or the Montgomery County Attorney.”
The county seeks both injunctive relief to remove illegal improvements and restore preexisting conditions. The county also seeks monetary fines totaling $100 for each act of violation and each day of violation.
The complaint, however, does not enumerate specific alleged violations.
Depending on alleged violations, the outcome of this could set a precedent for other sand mines operating on the West Fork.
Homeowners Have Additional Complaints
The mine also faces problems from local homeowners.
The mine is operating adjacent to a once-quiet neighborhood called Carriage Hills in Conroe. It is sending heavy trucks weighed down with sand up and down Carriage Hills Boulevard. Residents say the noise exceeds 85 decibels, the trucks have torn up roads, and they fear for their children’s safety.
The trucks, as many as 12 at a time, begin idling outside the plant gate at 6:30 a.m. and run up and down Carriage Hills Boulevard hundreds of times a day – by one count 600 times.
They believe 600 dump trucks a day at intervals of 2 minutes or less, starting at 6:30 a.m. “substantially interferes” with their ability to enjoy their land and that it causes “unreasonable discomfort or annoyance.”
The operation will not end anytime soon without a restraining order. The company is just now removing the overburden, trying to get to frack sand.
Only Restraining Order Will Stop Operation Now
Homeowners believe the operation will likely devalue their properties.
They also worry about the safety risk to children given the high volume of industrial vehicles with tons of payload traveling at speeds that make them unable to stop to stop quickly on residential streets.
Some of the residents plan to present the petition to commissioners tomorrow.
Posted by Bob Rehak on 3/23/2020
938 Days after 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/2020/03/Two-Trucks.jpg?fit=1200%2C677&ssl=16771200adminadmin2020-03-23 21:10:532020-05-25 05:34:12MoCo Will Vote Tomorrow on Whether to Sue New Sand Mine in Carriage Hills
The tribe fought for more than 160 years to get legal protection for the Whanganui River. In 2017, New Zealand granted legal personhood to the Whanganui River. Since then, other nations have followed suit in an effort to protect the environment.
The author’s article, Kate Evans, says, “Environmental personhood has been studied as a way of protecting nature since at least the 1970s. In his book Should Trees Have Standing?, American law professor Christopher D. Stone argued that environmental interests should be recognised apart from human ones. His work influenced Maori academics James Morris and Jacinta Ruru, who wrote Giving Voice to Rivers, making a case for why waterways in New Zealand should be seen as legal people.”
India Grants then Revokes Legal Personhood Status
Evans says that following the decision in 2017, the Ganges and Yamuna rivers in India and all rivers in Bangladesh also received legal rights – although, in India, the decision was later revoked.
Evidently, personhood status can backfire in some places. If the river is a person, and the river floods someone, the river can then be held liable. That’s the downside. But on the plus side, the river can sue polluters.
Protecting Essential, but Voiceless Elements in Nature
The latest edition of Stone’s book continues to serve as the definitive statement as to why trees, oceans, animals, and the environment as a whole should be bestowed with legal rights. The argument: to help protect the voiceless elements in nature for future generations.
Think enough people in Texas would support legal personhood for the San Jacinto River? It’s not unheard of in the U.S.
In Ohio, Lake Erie, which supplies much of the state’s drinking water, was given limited legal rights a few years ago.
The San Jacinto supplies much of our drinking water.
Posted by Bob Rehak on 3/23/2020
937 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/03/Screen-Shot-2020-03-23-at-2.34.14-PM.png?fit=1194%2C668&ssl=16681194adminadmin2020-03-23 15:10:552020-03-23 16:08:43New Zealand Gives River Status of “Legal Personhood”
Yesterday, I posted about rains that quickly brought Lake Conroe back up to its average for March. Additional rain last night and today brought the lake up another 3.24 inches to 200.23 as of 9pm on 3/22/2020. That means the lake is now within about 1 inch of its average level for April.
Source SJRA.net. Readings as of 9pm on Sunday, March 22, 2020.46-year average levels for Lake Conroe. Variation due to rainfall, evaporation and releases. Source: SJRA.net. Chuck Gilman presentation and January 2020 board meeting.
This now means that SJRA would release enough water starting April 1 to reduce the level of the lake to 200 feet above sea level. If the lake remains at this level, that would mean lowering it about 3.24 inches starting April 1.
The purpose of the SJRA’s temporary seasonal lake lowering program: to provide a margin of safety against flooding until downstream mitigation measures can be put in place. Those include West Fork mouth bar dredging and additional floodgates on Lake Houston to lower the level of the lake faster during a flood.
Renewal of the policy was the subject of a bitter fight between Lake Conroe and Lake Houston between December 2019 and February 2020. It culminated in a board meeting attended by approximately 1500 residents from both communities.
Posted by Bob Rehak on 3/22/2020
936 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/03/March-22-Lake-Level.png?fit=900%2C531&ssl=1531900adminadmin2020-03-22 21:35:152020-03-22 21:42:20Additional Rain Puts Lake Conroe Within 1 inch of April Average
Lake Conroe area businesses, boaters, home values and tax rolls got a boost yesterday. Yes, despite the drought, Lake Conroe returned to its normal level for this time of year. The watershed received an average of 2 to 2.5 inches of rain in the last 36 hours. That’s all it took.
The March average for the last 47 years (since the lake was built) is 199.98. The current lake level as of 5pm on 3.21.2020 is 199.96. That virtually equals the March average.
The difference, 0.02 ft., is less than a quarter inch. That’s less that the thickness of a pencil.
36 hour rainfall totals for Lake Conroe area sensors. Source: SJRA.onerain.com.SJRA Dashboard as of 5pm on 3.21.202047 year average for monthly Lake Conroe levels. Source: SJRA
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/03/Current-vs-Average-March-Conroe-Level.jpg?fit=1200%2C962&ssl=19621200adminadmin2020-03-21 17:51:392020-03-21 18:20:53Lake Conroe Returns to Average Level for March
LJA Engineers submitted a master drainage plan for the 2,200 acre Artavia development that Montgomery County approved. It has no detention ponds. And the drainage channels currently do not connect to the San Jacinto river. Even though LJA said they would connect to the river, the plans do not specify how, when or where. As you will see below.
Dead-end drainage. Currently, the Artavia drainage channel stops just short of the Liberty Materials Moorehead mine in the background. The San Jacinto River lies beyond the mine. This and all other aerial photos below were all taken March 6, 2020.
A Sand Mine Is Not the San Jacinto
The plans DO show the channel terminating in a sand mine between Artavia and the river. A spokesman for the sand mine said the developer is still trying to work out environmental and easement issues.
Aerial photos show the main channel stops about a 100+ yards short of LMI’s shipment facility. Meanwhile, during heavy rains, the dead-end drainage overflows onto surrounding properties. A spokesman for the mine claimed that the overflow flooded the mine last year and caused the dikes to break. He alleged that was the proximate cause for 56 million gallons of white sediment-laden water entering the West Fork.
Exhibit 2 of Artavia Drainage Impact Analysis from 9/20/2018 shows the project outfall in the middle of the LMI sandpit that borders Moorehead Road and the San Jacinto West Fork in Montgomery County.
The project manager for LJA did not return calls to explain their position on the dead-end drainage. And when asked for an explanation, the new Montgomery County Engineer (not the one who signed these plans) only referred me back to LJA.
Below are the drainage plans for Artavia, obtained by a Freedom of Information Act request to Montgomery County.
Several things have jumped out at me so far. LJA has not yet returned phone calls, so to me they remain…
Unaddressed Issues
Elevation Change Accelerates Flow
Elevation drops suddenly as you get near the river – 12 feet. That accelerates waterflow and threatens the sand mine. As you can see above and below, the channel is like a firehose aimed at the mine. That mine has enough problems of its own. In the past, dike breaches have affected Lake Houston water quality; we don’t need more of that. The mine blames the breaches on water overflowing from the Artavia ditch.
Note how the water in this short section of Artavia’s drainage ditch does not even pond at one end and reaches halfway up the banks at the other. That shows the slope. The SJR West Fork is between the two sections of the mine in background.
Flow Rates Understated
LJA calculations appear to understate the volume and velocity of flow. They use a Manning’s coefficient of .035, a value associated with pasture/farmland or channels filled with stones and cobbles. The coefficient recommended for smooth channels is 0.022. The difference creates a 63% increase in velocity and a 60% increase in volume of flow.See for yourself. With no real way yet for the water to get to the river or under FM1314, that will cause water to pile up much faster.
Not too many cobbles and boulders in this channel.All sand and siltwhich is already blocking culverts.
LJA also uses pre-Atlas rainfall statistics in their calculations of 10-, 25- and 100-year peak flows. The new Montgomery County standard is 16.1 inches in 24 hours compared to the 12.17 that LJA used for the 24 hour, 100-year flood.
Did LJA use “good engineering practices” and model Atlas 14 to ensure that it actually contained the 100-yr, 24-hr storm? There’s an ethical issue here. Did they put public safety first? We don’t know because they didn’t say so in any of their documents.
No Mention of Wetlands
LJA never mentions wetlands in their analysis. However, the National Wetlands Inventory shows wetlands on Artavia property and other property Artavia drains through.
Wetlands on Artavia Property or property Artavia drainage would likely have to go through.
Threat to Pipeline
A pipeline crosses the Liberty Materials mine. High velocity flow through the mine could undermine and threaten that pipeline like it did at another Liberty mine and at the Triple PG mine on the East Fork.
Green line shows path of pipeline across across Liberty Materials Mine. White line shows current path of drainage ditch.
No Outlet
There’s no explanation for how Artavia will get water through the pit at the end of their ditch. They can not store Artavia’s runoff in the pit. Their pit is already filled to the brim with highly silty, turbid water. Another unauthorized discharge could affect water quality in Lake Houston...again!
Level of water in the pit that Artavia’s ditch would have to drain through. Pit is already overflowing. West Fork is in background.TCEQ measured suspended solids in pit’s water at 25X higher than river.
Threat to Mine
A representative for the mine owner says the mine owner doesn’t want more water in the pit. They can’t afford the cost from environmental or business perspectives. With the COVID-19 threat, construction activity is way down. So margins are slim. And they can’t afford to have water fill their deep pit where they dry mine.
“No Adverse Impact”
LJA claims the project will have no adverse impact on downstream properties. But it already has. Properties along Greenbaugh and in Oak Tree have flooded since Artavia started clearing land and filling in wetlands.
Oak Tree detention pond (behind camera) used to overflow into wetlands. Then Artavia started clearing and filling. Now water backs up into the 40+ homes in the small subdivision.
The Liberty Materials mine also alleges it was flooded by Artavia’s overflow, resulting in the discharge of 56 million gallons of silty water into the West Fork.
LJA can only convey 68 cfs under FM1314. Meanwhile, TxDoT has not yet finished the design for a bridge. They hope to start bidding the job by the Fall of this year. Residents, not the developer, will pay for the improvement through the local municipal utility district.
Artavia ditch on north side of FM1314Where water exits on the downstream side of FM1314Channel downstream/south of FM1314.
LJA claims “The culvert crossings were designed to have capacity to convey 100-year storm events.” But they certainly aren’t doing that now.
Diverting Water From East to West Fork
The developer appears to be diverting water from the East Fork watershed to the West Fork watershed. See Section 1.4 and Exhibit One.
It would be harder to “beat the peak” to the East Fork. It’s 12 times farther away; water would take much longer to get there. So the diversion appears to be an attempt to avoid building detention ponds. But the diversion adds to flood volume in heavily populated West Fork areas where far more homes flooded during Hurricane Harvey.
Will LJA Figure It Out In Time?
For the sake of adjacent residents and businesses, let’s hope they figure these loose ends out before the next flood.
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/2020/03/20200306-RJR_9170.jpg?fit=1200%2C800&ssl=18001200adminadmin2020-03-20 20:48:012020-03-20 23:58:19The MoCo/LJA Way: Build First; Work Out Drainage Details Later
Mark Mooney, PE, the long-time Montgomery County Engineer whose office approved LJA plans for Woodridge Village and Artavia, and whose office oversaw LJA’s investigation of itself, has joined LJA Engineering as a “business development representative.” (Usually that means “sales.”)
A February 17, 2020, press release about Mr. Mooney’s appointment appears on LJA’s Facebook page. According to insiders, Mr. Mooney actually started working part time with LJA shortly after his retirement from MoCo. That happened after the May floods in 2019. However, the release now implies the relationship is full time. It appeared just days before LJA was named as an additional defendant in the Elm Grove flooding case. Below is the entire release verbatim:
MARK MOONEY, PE JOINS LJA AS BUSINESS DEVELOPMENT REPRESENTATIVE
After 34 years with Montgomery County, during which most of the time he served as the County Engineer, Mark Mooney, PE has joined LJA Engineering.
During his tenure, he had oversight of all major road initiatives through numerous bond elections; provided advice, direction, and consultation to 5 different County Judges and 17 different County Commissioners; oversaw the review and approval of over 3500 residential and commercial subdivision plats; oversaw the review, approval and inspection of over 1300 miles of road construction; and, provided daily services to a population that grew from 160,000 residents to over 600,000 residents in the 34-year span.
“I have known and respected Mark for many, many years. When the opportunity presented itself, I knew he was a perfect fit for LJA. We have four offices within Montgomery County and are personally and professionally vested in the growth and success of our employee-owners and clients there. Mark has dedicated his career to this community, and we want him to keep doing what he does best, serving Montgomery County,” said Jeff Cannon, Senior Vice President.
Mark was a Member of the City of Houston planning commission from February 1998 to May 2019. He is a Member of the Texas Association of County Engineers and Road Administrators (TACERA) since 1998; having served as President from 2005-2006, and he has been a Member of the National Association of County Engineers (NACE) since 1998.
Joining LJA, Mark explained, “It was the confidence that I felt between myself and Calvin Ladner (LJA President), that began when we were both a lot younger back in the mid-eighties, that sealed the deal. My responsibilities as the Montgomery County Engineer were made much easier by the honesty I had with Calvin initially and then with so many of the staff at LJA throughout the years. In my 34 years in this business, it always came down to trust as being the most important aspect as a public official. At LJA, I am ready to further develop my industry relationships utilizing the same playbook that worked for me for so many years as Montgomery County’s engineer.”
End of Release
Revolving Door Between Government and Business
[Rehak here again.] Before retirement, I frequently saw how the revolving door worked between government and business. I knew a man who went to Washington and worked for the EPA in a high level position “to get his ticket stamped.” Those were his words, not mine. After working in D.C. for several years, he returned to private industry where he made considerably more money, thanks to the insights he gave clients about how the EPA worked.
Personal connections provide knowledge of agency priorities; understanding of personal hot buttons; insights into procedures; and relationships with decision makers. They all prove valuable to companies whose sales depend on public-sector approval.
Fine Line Between Harmless and Harmful
There’s nothing illegal or immoral about this per se. On the innocent side, sometimes, if projects get bogged down, a call to an old friend can:
Move plans from the bottom of a pile to the top in an emergency.
Determine what the agency’s concerns about a set of plans might be so the concerns can be addressed quickly.
Speed up slow approval processes that run up costs.
Cases like these harm no one. They represent a form of social engineering or influence peddling that has been around as long as governments. However, what is normal and accepted in principle can sometimes turn sourin practice.
For instance, private-sector engineers/consultants might urge decision makers who are old friends on the government side to:
Rubber stamp questionable plans without looking too closely at them. (“Trust me.”)
Look only at the conclusion of a report without scrutinizing the assumptions, methodologies, underlying calculations and support.
Between these two extremes, between legal and illegal, infinite shades of gray exist.
Public’s Presumption of Oversight
Cases like those in the latter category can mislead the public and have devastating consequences. The public presumes the government is overseeing development (or at least the permitting of plans). In fact, government may not be. Those plans and stamps and dazzling arrays of figures may create the appearance of professional oversight when none exists.
Families may invest their life savings in homes based on the presumption of government oversight. Officials are supposed to ensure that there is no adverse downstream impact from a new development. But as we’ve seen in Elm Grove and elsewhere, that’s often not the case.
Bad Optics for Ethics
Exerting influence can sometimes cross moral, ethical and legal lines. I’m not saying it happened with Mr. Mooney. I have no evidence to even lead me to suspect such a thing. By all accounts, Mr. Mooney is honest and reputable.
Apparent Conflict of Interest In Elm Grove Investigation
However, it was on Mr. Mooney’s watch as County Engineer that the TCEQ referred a complaint about Woodridge Village involving LJA to Montgomery County for investigation.
To inspire public confidence in the outcome of the investigation, you would think that LJA would have recused itself or the county engineer would have hired another company for this particular investigation. Neither thing happened.
Certifying No Need for Detention Ponds in 2,200-Acre Development
Mooney’s department also vetted the LJA Drainage Impact Analysis for Artavia. It certified no detention ponds were necessary for the 2,200 acre development because it would have no impact on the West Fork San Jacinto. However, the report did not examine the impact on:
Surrounding homes whose drainage has been blocked
The impact on downstream flooding, i.e., loading Lake Houston before floodwaters arrive.
Approving Dead-End Drainage
Artavia’s Drainage Ditch stops before reaching the San Jacinto West Fork. The company hopes to work out some environmental and drainage easement issues that would allow the ditch to cross the LMI mine in the background.
LMI also blames Artavia’s alleged overflow for flooding a deep pit where they are doing dry mining. A large part of the pit remains flooded; disrupting LMI’s normal operations, according to a company spokesperson. (More on this in a future post.)
Supposedly dry pit that LMI says was flooded by Artavia drainage ditch overflow.
Meanwhile, Artavia is building homes and the developments drainage ditch still does not reach the river.
Certifying “No Adverse Impact” for Woodridge Village Right Before 400 Homes Flood
Under Mooney’s watch, county engineers certified that LJA plans would have no adverse impact on Elm Grove…right before 400 homes in Elm Grove flooded.
MoCo Engineers office certified “No adverse impact” for Elm Grove where hundreds of homes flooded twice in five months last year.
Accepting Job With LJA Right Before LJA Sued by Flooded Elm Grove Residents
The optics of these incidents sure don’t inspire trust and confidence in LJA, Mr. Mooney, or Montgomery County developers. In future posts I will dig into more of the details behind these incidents.
Calls to LJA’s project manager for Artavia went unanswered for days before this post. If LJA wishes to submit a response to this post, I will publish it verbatim.
Posted by Bob Rehak on 3/19/2020
934 Days after 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/2019/05/Rescue-Truck-1.jpg?fit=1500%2C729&ssl=17291500adminadmin2020-03-19 21:02:222020-03-19 21:45:08Right Before LJA Sued, LJA Employs County Engineer Who Approved LJA Plans
On March 6, I flew over the Union Pacific bridge repairs near 59 and the West Fork and noticed some splashing I could not explain. I’ve been on a fruitless search for answers ever since. So now I’m enlisting your help. But first a quick update on the status of repairs.
Update on Repairs
Not much had visibly changed since the previous month on February 23rd. I observed that:
The north side of the river looked considerably cleaner.
Virtually all supports for the north side of the temporary bridge had been removed.
Virtually all of the old supports between the new supports for the main bridge were gone.
The big red crane was starting to retreat back to the southern side of the river.
Some sort of underwater cutting torch operation was in progress.
Pontoon-based lifting equipment was retrieving cut pipe and old cement from the river bottom.
Incremental changes since Feb. 23 flyover. This and all photos below taken March 6.
Enlargement Reveals Splashing
However, when I downloaded the images at home and reviewed them on a big screen, I saw something I could not explain. I saw a giant splash in the water under the bridge that went up at least 10 feet. At first I thought something fell from the bridge. But there was nothing on the bridge as you can see above.
Strange splash in water near old support. Caught at 1/8000th of a second from a helicopter 250 feet away.
Further review of the images reveal tanks of industrial gas, likely used for underwater cutting torches.
Tanks of what might have been acetylene for underwater torches.
Then I noticed the same splash in the same place in dozens of other images as the helicopter circled around the bridge.
Similar splash in same spot several seconds later from different camera position. Also at 1/8000th of a second.
Something falling could have created the splash in one frame. But not multiple frames. Especially since I was shooting at 1/8000th of a second to minimize vibration from the helicopter.
Shot from other side of bridge about 30 seconds later.
The series of shots shows continuous splashing in a virtually identical pattern.
26 Frames Taken 3 Seconds Apart Show Similar Splash
It took almost a minute and a half to circle the operation. During that time, I took 26 shots. Each shot shows water “erupting” in the same place, the same pattern, and to roughly the same height. All while workers sat by unconcerned!
So this was a normal part of the operation. But what caused it? I’m not familiar with underwater cutting. However, I’m guessing, with all the offshore experts in Houston, someone can explain it.
Photo of same site when workers no present by Mike Combat Wilcox.
Mike Combat Wilcox sent me this image from his boat when workers were not present. No workers. No splash. Hmmmm. The mystery deepens.
Two Ways to Help
A hearty corona-virus-free handshake through social media to anyone who has the answer. I will publish it…with a credit if you can explain it.
And let’s have some fun while we’re at it. We need more of that these days.
I’ll also publish a separate list of “creative” answers from the clueless (like me). Try to make people laugh with those. For instance, were the splashes actually “oil company stocks taking a nosedive during corona week”? You get the idea. Have fun people! If you can. I know its painful.
Posted by Bob Rehak with image from Mike Combat Wilcox on 3/18/2020
932 Days after Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/03/Splash1.jpg?fit=1200%2C893&ssl=18931200adminadmin2020-03-18 21:12:492020-03-18 22:13:42Help Wanted: Can You Explain This Strange Splashing in Water Near RR Bridge Repairs?
It all seemed somewhat academic at the time – unless you previously flooded from upstream development. Then along came Imelda. The absence of functioning detention ponds on Perry Homes’ Woodridge Village property underscored the need for adequate detention for the second time in five months when hundreds of homes downstream in Kingwood flooded.
The engineering company for the developer, Aliana, claims their calculations show that floodwater from Artavia will beat the peak of a flood to the West Fork by 35 hours. Dasa Crowell, PE, LJA’s Project Manager for Hydrology and Hydraulics, thus concluded, “This leads us to a conclusion that the peak flows generated by the runoff from project drainage area will have no impact on the WFSJR under proposed conditions, therefore detention is not required.” See page 56 of this PDF.
In fairness, the development does include a retention pond in Section 1 labeled as a detention/amenity pond. However, aerial photos show that it has only a few feet of excess storage capacity above its normal water surface elevation. See the plans here. It’s certainly not going to hold back a 100-year rain falling over 2200 acres.
Little Buck Amenity Facility/Pond. Note that as-built conditions appear smaller than plans.
Engineers seem to be relying on drainage channels to act as their detention basins, but as we will see, that comes with some risk. And one potentially bad assumption may invalidate the whole concept.
Because detention costs money and limits the number of salable lots, developers try to get their water to the river as quickly as possible so they can “beat the peak.” Of course, racing to get water to the river in a flood is the exact opposite of what you want to happen if you are a downstream resident. Normally, you want developers to hold water back as long as practical so as not to overwhelm downstream channel capacity.
Wilds said in part, “The analysis … demonstrates that the peak flow from the developed tract will pass through the downstream cross-section approximately 35 hours prior to the peak flow from the upstream watershed. The report indicates that the 10-year, 25-year and 100-year events were analyzed and concludes that the runoff from the project drainage area will have no impact to the San Jacinto River under proposed conditions.”
“Based on this information, this office offers no objection to the analysis as presented. Storm water detention will not be required for this development as long as the developed flows up to and including the 100-year event can be adequately conveyed to the San Jacinto River.” For the full text, see page 51 of this PDF.
The Executive Summary of the most recent update of the drainage impact analysis for Artavia states, “The November 2014 memorandum documents the analysis supporting no detention requirement; this analysis provides calculations showing that the proposed Star Ridge Ranch development (as it was then called) drainage system will safely convey the rainfall runoff for rainfall events up to and including the one-percent annual chance (100-year) storm event.”
Similarities Between Woodridge Village and Artavia
Finally, LJA pushed both the Woodridge and Artavia plans through the MoCo Engineers office right before the drainage criteria manual was about to be updated again with more stringent requirements.
LJA submitted both drainage analyses for MoCo approval within approximately a year of Hurricane Harvey before flood maps, rainfall statistics, drainage criteria, and construction standards were updated.
LJA Engineering was not only playing beat the peak, it was playing beat the clock again. This will be the first of several posts on Artavia. More news to follow.
Posted by Bob Rehak on 3/17/2020
931 Days after 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/2020/03/20200306-RJR_8998.jpg?fit=1200%2C800&ssl=18001200adminadmin2020-03-17 21:29:282020-03-17 22:31:30LJA Engineers 2200-Acre Artavia Development in Montgomery County Without Detention Ponds