Harris County Flood Control, SJRA, and the Cities of Humble and Houston using funding provided in part by the Texas Water Development Board are searching for sediment solutions in the Upper San Jacinto River Basin. Their major scientific study includes all or parts of seven counties: Harris, Montgomery, Waller, Grimes, Walker, San Jacinto and Liberty – all land draining into Lake Houston.
From Technical Memorandum 1 of the Upper San Jacinto River Basin Regional Sedimentation Study.
The high-level goal: to better manage sediment in the river basin. Sediment reduces both floodway conveyance and the storage capacity of Lake Houston. Both contribute to the frequency and severity of flooding.
Among other things, the study partners hope to prioritize sediment hot spots so they can develop sediment solutions and recommendations.
I hope they look at Colony Ridge. It exemplifies a major hot spot and points the way to an obvious sediment solution – better enforcement of existing regulations.
Scope and Status of Sediment Study
The study is now about half complete. With much of the fieldwork complete, the partners will next focus on modeling, hotspot identification, area prioritization and sediment solutions, according to Matt Barrett, Water Resources and Flood Management Division Manager atSJRA.
To date, the study has examined a variety of factors:
Sediment Solutions Must Address Development Practices
Erosion occurs naturally. But poor development practices can accelerate the rate of erosion unnaturally.
Regulations in Liberty County call for backslope interceptor swales to prevent sheet flow over the sides of ditches. I have yet to see one such system anywhere in the 30+ square miles of Colony Ridge. What you typically see is this.
All that sediment washes downstream where it reduces the carrying capacity of rivers and the storage capacity of Lake Houston.
Liberty County regulations also call for planting grass on the side slopes of ditches and detention basins. The grass reduces erosion, too. But you don’t see much grass on those side slopes either.
Compare the ditch above with the ditch below in Harris County to see how grass and backslope interceptor swales can reduce erosion.
Small swales behind main slopes capture sheet flow heading toward the ditch. Pipes then take runoff to the bottom of ditch, thus reducing erosion on side slopes.
Here’s Colony Ridge again.
Three-mile-long Colony Ridge drainage ditch has no grass or backslope interceptor swales.
Address the Elephant in the Room Before the Next Disaster
Ironically, both Liberty and Harris County have almost identical regulations for erosion control. Harris County enforces them; Liberty County doesn’t.
Enforcement of development regulations is the elephant in the room.
So, as the SJRA and its partners search for sediment solutions, here’s one simple recommendation. Enforce regulations already on the books.
Colony Ridge and other developments that skirt regulations represent a disaster waiting to happen. Unfortunately, it will probably take a disaster, such as Harvey, to cause leaders to take action. But by then, it will be too late.
Posted by Bob Rehak on 10/20/23
2242 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/2023/10/20231006-RJR_6038-1.jpg?fit=1100%2C733&ssl=17331100adminadmin2023-10-20 14:08:222023-10-20 17:39:42Search For Sediment Solutions Should Lead Straight to Colony Ridge
Ten days ago, the entire Republican Congressional Delegation from Texas asked State Attorney General Ken Paxton to investigate Colony Ridge, the controversial development in Liberty County. Today, he responded with a scathing letter that kicked Colony Ridge criticism up quite a few notches. Paxton also sent the letter to Governor Greg Abbott; Dade Phelan, Speaker of the Texas House; and Lieutenant Governor Dan Patrick.
Neighboring communities have also complained about crime, traffic, destruction of roads, and rapidly growing burdens on the Plum Grove Volunteer Fire Department.
Too Much Chaos to be Tolerated
Paxton asks whether a settlement the size of Colony Ridge should have been allowed to grow that large without annexation or incorporation. By some estimates, Colony Ridge now has upwards of 40,000 people. If accurate, that would make it larger than the three largest cities in Liberty County combined!
Paxton says, “…this unincorporated settlement has drawn far too many people and enabled far too much chaos for the current arrangement to be tolerated by the state.” Boom.
Colony Ridge Business Model Caters to Cross-Border Settlement
Then Paxton talks about the business model used by Colony Ridge. “Texas has seen a growing trend of real estate developers buying huge quantities of undeveloped land, creating primitive subdivisions, and selling the bare lots in a practice often paired with offering minimal-down-payment, high-interest owner-financed loans,” he says.
“These loans require little identity verification. Lax development codes for unincorporated areas mean residents can crowd onto a property and the residential population can expand quickly.”
Paxton continues, “This form of real estate development and financing has created an attractive opportunity for noncitizens to cross the border and settle in Texas, with fast-growing developments the size of entire cities forcing nearby areas to struggle to adapt to—and even subsidize—the influx of new residents enriching the developers.
Unmanageable Size
“The scale of the Colony Ridge development has proved unmanageable for effective law enforcement and other key standards of acceptable governance,” he says. “Violent crime, drug trafficking, environmental deterioration, public disturbances, infrastructure overuse, and other problems have plagued the area and nearby towns.”
Distorting the Intent of Municipal Management Districts
In the next page and a half of Paxton’s letter, he details how the developers, with the help of State Senator Ernest Bailes and Senator Robert Nichols, perverted the intent of Texas Local Government Code which deals with the creation of Municipal Management Districts (MMDs).
MMDs were intended to revitalize and beautify already developed urban commercial areas. They were not intended to develop raw land, according to Paxton.
The Colony Ridge MMD controlled by the developer started with 5 acres then annexed tens of thousands of acres – also owned by the developer.
“…the managers of this district function as the unelected, unaccountable leaders of a city that is inhabited by an unknown population including unvetted foreign aliens and whose unsustainable growth is protected by a specific state carve-out,” says Paxton.
“The burden displaced onto the surrounding areas to subsidize public services needed by those residing in Colony Ridge is significant.”
Ken Paxton, Texas Attorney General
Criticism of Two Texas Lawmakers
He adds, “I am beyond disappointed in Senator Nichols and Representative Bailes for apparently working to enrich specific developers at enormous expense to the rest of the public and reducing the quality of life for their own constituents.”
“It [Colony Ridge] is a sprawling, highly populated settlement that will soon outpace the population of many cities in Texas yet is ungoverned by any meaningful authority other than the developers whose primary interest is selling more property to new residents.”
Attacks Those Trying to Downplay Colony Ridge Problems
Paxton concludes by attacking journalists and politicians trying to downplay the problems caused by Colony Ridge. He says, “…the people of Texas … never assented to the creation of a sprawling unincorporated, ungoverned zone…”
Paxton does not mention this transaction specifically, but it falls under “enriching developers at the expense of the public.”
Note that the developer runs the MMD mentioned above. Also note how in these MMD board meeting minutes, the developer set the tax rate on his customers, gives his brother a $9.9 million paving contract and approves a reimbursement agreement for “the developer.”
The purpose of an MMD is to promote the public interest. But the developer is using his position as MMD president to defray his own costs. In a transaction that certainly raised my eyebrows, he and his board awarded a contract worth almost $10 million to Liberty Paving, a company controlled by his brother’s T-Rex Management Inc.
The developer has asserted that Colony Ridge is like any other community. All these photos below were taken on 10/6/2023, one day after the developer took several state legislators on a guided tour of the nicer areas in the development near the Grand Parkway – as the northern entrance flooded.
The neighborhood swimming pool.Note tarp for roof and trees growing in another pool.Colony Ridge residents often operate businesses from their homes.
Paxton’s letter points out that in 2019, “the developer insisted extra state funding was needed to accommodate the growth of residents because the area had so little commercial tax revenue.” No wonder those commercial taxes are down.
A backyard AC recycling business? A backyard car repair business?Used car lot in the front yard? Or car rental agency?A Google search says these containers can hold chemicals, food and water.I am not sure what these held but the volume certainly goes beyond the needs of one family. Perhaps someone is smuggling in fresh water.
Next up: Will the Texas legislature take any meaningful action in its special session? Come back soon as the Austin action unfolds.
Posted by Bob Rehak on 10/19/23
2242 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/2023/10/20231006-RJR_2514.jpg?fit=1100%2C733&ssl=17331100adminadmin2023-10-19 16:49:122023-10-19 23:05:15Paxton Letter Kicks Colony Ridge Concerns Up a Notch or Ten
At Mayor Pro Tem Dave Martin’s final town hall meeting last night, he and Chief Recovery Officer Stephen Costello gave an update on the status of new, higher capacity floodgates for the Lake Houston Dam. Their talks also addressed dredging and sand traps.
City of Houston Chief Recovery Office Stephen Costello (l) and Mayor Pro Tem Dave Martin at Martin’s final town hall meeting on 10/17/2023. Term limits bar Martin from running again for Council, though he is running for City Controller.
According to the latest estimate, construction of the gates now looks like it could begin in mid-2026, barring unforeseen setbacks.
The City has scheduled more dredging for the San Jacinto West Fork south of where the mouth bar used to be. Also, Costello says the City has completed opening up ditches and tributaries north of the railroad bridge and is now starting on those south of it.
Finally, Costello revealed that Lake Houston has lost almost 20% of its capacity due to sedimentation. To receive future dredging grants, the City must take steps to reduce the rate of sediment inflow. Costello revealed plans for a pilot sand-trap project in a point bar outside the Hallett mine far upstream. He said that the mine had agreed to remove trapped sediment there for free. Otherwise, he did not explain why a possibly more effective location closer to the problem area was not chosen for the pilot project.
For more details on each, see below.
Gates Details/Timeline
The purpose of adding more floodgates to the Lake Houston Dam: to lower the lake faster in advance of a flood.
The City must now start to lower the lake so far in advance of a storm that storms can veer away before they arrive. This wastes water.
The existing gates have 1/15th of the release capacity of the gates on Lake Conroe. This makes a joint pre-release strategy virtually impossible in extreme storms.
After examining and discarding the notion of adding crest gates to the spillway portion of the dam, the City is now focusing on adding 11 tainter gates to the earthen portion of the dam (east of the existing gates).
Proposed location for 11 new tainter gates.
With Mayor Sylvester Turner’s help, the City secured enough funding for construction during the regular session of this year’s legislature.
Next steps include:
3/24 – New environmental and historic preservation assessments, Army Corps permitting
12/24 – Construction plans completed
1/25 – Bidding
6/25 – Award Contract
5/26 – Begin Construction
The success of this plan will require the election of a new Mayor and City Council Representative who are committed to the project. Early voting begins next week.
Dredging Volumes, Costs
Dredging at various locations around Lake Houston will likely be a continuous effort for years to come. Sedimentation has already reduced the capacity of Lake Houston an estimated 18%. The City estimates future yearly losses in the range of 360-460 acre feet per year.
Historic and projected capacity loss in Lake Houston due to sedimentation.
One acre roughly equals the size of a football field. So imagine 400 football fields covered with sludge a foot deep. Each year!
To keep this problem in check, the City is already looking at doing additional dredging on the East and West Forks. It and the Army Corps finished major projects in both areas less than four years ago.
East of Atascocita and south of the convergence of the East and West Forks, the City plans to spend another $34 million to remove almost 900,000 cubic yards of sediment.
To date, Costello estimates that dredging nearly 4 million cubic yards of material has cost $186 million.
Summary of dredging costs and volumes in Lake Houston since Harvey
The City hopes to recoup some of these costs by reselling sand that it recovers from “hilltops” in the lake. Costello showed the heat map below. Notice the heavy sediment concentrations in the lake’s headwaters. This is because sediment drops out of suspension where rivers slow down as they meet standing bodies of water.
In addition to reducing the volume of Lake Houston, the sediment also poses a flood threat. It reduces conveyance of the rivers and lake forcing water up and out. Sediment blockages, such as the mouth bar, can also form dams that back water up.
Costello also addressed the ongoing dredging of 17 canals around Lake Houston. He said the focus is now shifting to the southern part of the lake.
Sand Traps to Reduce Inflow
In addition to dredging sediment from the lake, Costello also emphasized the need to reduce sediment coming downstream via sand traps. This last effort may be a condition of future grants for dredging.
Costello described two pilot types of pilot projects that the City is working on with the SJRA and sand-mining industry. The first is “sand traps” dug in point bars outside sand mines. The second: in-channel traps.
The idea behind the traps: dig holes in the river or its sand bars where migrating sand can settle out of the flow before it reaches the lake.
The first project may be near the Hallett Mine on the West Fork. According to Costello, the mine has agreed to remove the sand for free, thus reducing long term maintenance costs.
During Q&A after Costello’s presentation, however, he admitted that the City has no plans to try to get sand mines to reduce illegal emissions. In one notable instance, the TCEQ documented 56 million gallons of sludge discharged into the West Fork by the LMI mine.
Controlling sediment is crucial in reducing flooding. Accumulated sediment reduces storage capacity and conveyance for stormwater. The smaller capacity means lakes and rivers will flood faster and higher.
For high res versions of all the slides shown in the Town Hall, see this PDF.
Posted by Bob Rehak on 10/17/23
2241 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2023/10/20230812-RJR_2234-copy.jpg?fit=1100%2C733&ssl=17331100adminadmin2023-10-18 06:47:582023-10-18 15:28:45Update on Floodgates, Dredging, Sand Traps from Martin, Costello
Search For Sediment Solutions Should Lead Straight to Colony Ridge
Harris County Flood Control, SJRA, and the Cities of Humble and Houston using funding provided in part by the Texas Water Development Board are searching for sediment solutions in the Upper San Jacinto River Basin. Their major scientific study includes all or parts of seven counties: Harris, Montgomery, Waller, Grimes, Walker, San Jacinto and Liberty – all land draining into Lake Houston.
The high-level goal: to better manage sediment in the river basin. Sediment reduces both floodway conveyance and the storage capacity of Lake Houston. Both contribute to the frequency and severity of flooding.
Among other things, the study partners hope to prioritize sediment hot spots so they can develop sediment solutions and recommendations.
I hope they look at Colony Ridge. It exemplifies a major hot spot and points the way to an obvious sediment solution – better enforcement of existing regulations.
Scope and Status of Sediment Study
The study is now about half complete. With much of the fieldwork complete, the partners will next focus on modeling, hotspot identification, area prioritization and sediment solutions, according to Matt Barrett, Water Resources and Flood Management Division Manager atSJRA.
To date, the study has examined a variety of factors:
The Colony Ridge area receives some of the highest rainfall totals and highest intensity rains in the river basin.
Colony Ridge also ranks among the most erodible areas in the entire river basin.
So, you would hope that a development 50% larger than Manhattan, which is decimating forests and filling in wetlands would receive some scrutiny.
Sediment Solutions Must Address Development Practices
Erosion occurs naturally. But poor development practices can accelerate the rate of erosion unnaturally.
Regulations in Liberty County call for backslope interceptor swales to prevent sheet flow over the sides of ditches. I have yet to see one such system anywhere in the 30+ square miles of Colony Ridge. What you typically see is this.
Liberty County regulations also call for planting grass on the side slopes of ditches and detention basins. The grass reduces erosion, too. But you don’t see much grass on those side slopes either.
Compare the ditch above with the ditch below in Harris County to see how grass and backslope interceptor swales can reduce erosion.
Here’s Colony Ridge again.
Address the Elephant in the Room Before the Next Disaster
Ironically, both Liberty and Harris County have almost identical regulations for erosion control. Harris County enforces them; Liberty County doesn’t.
So, as the SJRA and its partners search for sediment solutions, here’s one simple recommendation. Enforce regulations already on the books.
Colony Ridge and other developments that skirt regulations represent a disaster waiting to happen. Unfortunately, it will probably take a disaster, such as Harvey, to cause leaders to take action. But by then, it will be too late.
Posted by Bob Rehak on 10/20/23
2242 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.
Paxton Letter Kicks Colony Ridge Concerns Up a Notch or Ten
Ten days ago, the entire Republican Congressional Delegation from Texas asked State Attorney General Ken Paxton to investigate Colony Ridge, the controversial development in Liberty County. Today, he responded with a scathing letter that kicked Colony Ridge criticism up quite a few notches. Paxton also sent the letter to Governor Greg Abbott; Dade Phelan, Speaker of the Texas House; and Lieutenant Governor Dan Patrick.
Burden on Surrounding Communities
Paxton’s letter echoes many of the criticisms made in the media recently about Colony Ridge. But then he goes far beyond those.
After discussing illegal immigration, he addresses the impact of the development on Cleveland ISD and neighboring communities.
While Paxton does not cite these specific examples, they represent the types of concerns neighbors have complained about for years.
Neighboring communities have also complained about crime, traffic, destruction of roads, and rapidly growing burdens on the Plum Grove Volunteer Fire Department.
Too Much Chaos to be Tolerated
Paxton asks whether a settlement the size of Colony Ridge should have been allowed to grow that large without annexation or incorporation. By some estimates, Colony Ridge now has upwards of 40,000 people. If accurate, that would make it larger than the three largest cities in Liberty County combined!
Paxton says, “…this unincorporated settlement has drawn far too many people and enabled far too much chaos for the current arrangement to be tolerated by the state.” Boom.
Colony Ridge Business Model Caters to Cross-Border Settlement
Then Paxton talks about the business model used by Colony Ridge. “Texas has seen a growing trend of real estate developers buying huge quantities of undeveloped land, creating primitive subdivisions, and selling the bare lots in a practice often paired with offering minimal-down-payment, high-interest owner-financed loans,” he says.
“These loans require little identity verification. Lax development codes for unincorporated areas mean residents can crowd onto a property and the residential population can expand quickly.”
Paxton continues, “This form of real estate development and financing has created an attractive opportunity for noncitizens to cross the border and settle in Texas, with fast-growing developments the size of entire cities forcing nearby areas to struggle to adapt to—and even subsidize—the influx of new residents enriching the developers.
Unmanageable Size
“The scale of the Colony Ridge development has proved unmanageable for effective law enforcement and other key standards of acceptable governance,” he says. “Violent crime, drug trafficking, environmental deterioration, public disturbances, infrastructure overuse, and other problems have plagued the area and nearby towns.”
Distorting the Intent of Municipal Management Districts
In the next page and a half of Paxton’s letter, he details how the developers, with the help of State Senator Ernest Bailes and Senator Robert Nichols, perverted the intent of Texas Local Government Code which deals with the creation of Municipal Management Districts (MMDs).
MMDs were intended to revitalize and beautify already developed urban commercial areas. They were not intended to develop raw land, according to Paxton.
The Colony Ridge MMD controlled by the developer started with 5 acres then annexed tens of thousands of acres – also owned by the developer.
“…the managers of this district function as the unelected, unaccountable leaders of a city that is inhabited by an unknown population including unvetted foreign aliens and whose unsustainable growth is protected by a specific state carve-out,” says Paxton.
Criticism of Two Texas Lawmakers
He adds, “I am beyond disappointed in Senator Nichols and Representative Bailes for apparently working to enrich specific developers at enormous expense to the rest of the public and reducing the quality of life for their own constituents.”
“It [Colony Ridge] is a sprawling, highly populated settlement that will soon outpace the population of many cities in Texas yet is ungoverned by any meaningful authority other than the developers whose primary interest is selling more property to new residents.”
Attacks Those Trying to Downplay Colony Ridge Problems
Paxton concludes by attacking journalists and politicians trying to downplay the problems caused by Colony Ridge. He says, “…the people of Texas … never assented to the creation of a sprawling unincorporated, ungoverned zone…”
To see the complete text of Paxton’s letter, click here.
$9.9 Million Paving Contract
Paxton does not mention this transaction specifically, but it falls under “enriching developers at the expense of the public.”
Note that the developer runs the MMD mentioned above. Also note how in these MMD board meeting minutes, the developer set the tax rate on his customers, gives his brother a $9.9 million paving contract and approves a reimbursement agreement for “the developer.”
The purpose of an MMD is to promote the public interest. But the developer is using his position as MMD president to defray his own costs. In a transaction that certainly raised my eyebrows, he and his board awarded a contract worth almost $10 million to Liberty Paving, a company controlled by his brother’s T-Rex Management Inc.
Normally, paving would be the developer’s cost.
Unpublished Pics of Colony Ridge
The developer has asserted that Colony Ridge is like any other community. All these photos below were taken on 10/6/2023, one day after the developer took several state legislators on a guided tour of the nicer areas in the development near the Grand Parkway – as the northern entrance flooded.
Paxton’s letter points out that in 2019, “the developer insisted extra state funding was needed to accommodate the growth of residents because the area had so little commercial tax revenue.” No wonder those commercial taxes are down.
Next up: Will the Texas legislature take any meaningful action in its special session? Come back soon as the Austin action unfolds.
Posted by Bob Rehak on 10/19/23
2242 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.
Update on Floodgates, Dredging, Sand Traps from Martin, Costello
At Mayor Pro Tem Dave Martin’s final town hall meeting last night, he and Chief Recovery Officer Stephen Costello gave an update on the status of new, higher capacity floodgates for the Lake Houston Dam. Their talks also addressed dredging and sand traps.
According to the latest estimate, construction of the gates now looks like it could begin in mid-2026, barring unforeseen setbacks.
The City has scheduled more dredging for the San Jacinto West Fork south of where the mouth bar used to be. Also, Costello says the City has completed opening up ditches and tributaries north of the railroad bridge and is now starting on those south of it.
Finally, Costello revealed that Lake Houston has lost almost 20% of its capacity due to sedimentation. To receive future dredging grants, the City must take steps to reduce the rate of sediment inflow. Costello revealed plans for a pilot sand-trap project in a point bar outside the Hallett mine far upstream. He said that the mine had agreed to remove trapped sediment there for free. Otherwise, he did not explain why a possibly more effective location closer to the problem area was not chosen for the pilot project.
For more details on each, see below.
Gates Details/Timeline
The purpose of adding more floodgates to the Lake Houston Dam: to lower the lake faster in advance of a flood.
After examining and discarding the notion of adding crest gates to the spillway portion of the dam, the City is now focusing on adding 11 tainter gates to the earthen portion of the dam (east of the existing gates).
With Mayor Sylvester Turner’s help, the City secured enough funding for construction during the regular session of this year’s legislature.
Next steps include:
The success of this plan will require the election of a new Mayor and City Council Representative who are committed to the project. Early voting begins next week.
Dredging Volumes, Costs
Dredging at various locations around Lake Houston will likely be a continuous effort for years to come. Sedimentation has already reduced the capacity of Lake Houston an estimated 18%. The City estimates future yearly losses in the range of 360-460 acre feet per year.
One acre roughly equals the size of a football field. So imagine 400 football fields covered with sludge a foot deep. Each year!
To keep this problem in check, the City is already looking at doing additional dredging on the East and West Forks. It and the Army Corps finished major projects in both areas less than four years ago.
East of Atascocita and south of the convergence of the East and West Forks, the City plans to spend another $34 million to remove almost 900,000 cubic yards of sediment.
To date, Costello estimates that dredging nearly 4 million cubic yards of material has cost $186 million.
The City hopes to recoup some of these costs by reselling sand that it recovers from “hilltops” in the lake. Costello showed the heat map below. Notice the heavy sediment concentrations in the lake’s headwaters. This is because sediment drops out of suspension where rivers slow down as they meet standing bodies of water.
In addition to reducing the volume of Lake Houston, the sediment also poses a flood threat. It reduces conveyance of the rivers and lake forcing water up and out. Sediment blockages, such as the mouth bar, can also form dams that back water up.
Sand Traps to Reduce Inflow
In addition to dredging sediment from the lake, Costello also emphasized the need to reduce sediment coming downstream via sand traps. This last effort may be a condition of future grants for dredging.
Costello described two pilot types of pilot projects that the City is working on with the SJRA and sand-mining industry. The first is “sand traps” dug in point bars outside sand mines. The second: in-channel traps.
The idea behind the traps: dig holes in the river or its sand bars where migrating sand can settle out of the flow before it reaches the lake.
The first project may be near the Hallett Mine on the West Fork. According to Costello, the mine has agreed to remove the sand for free, thus reducing long term maintenance costs.
During Q&A after Costello’s presentation, however, he admitted that the City has no plans to try to get sand mines to reduce illegal emissions. In one notable instance, the TCEQ documented 56 million gallons of sludge discharged into the West Fork by the LMI mine.
Controlling sediment is crucial in reducing flooding. Accumulated sediment reduces storage capacity and conveyance for stormwater. The smaller capacity means lakes and rivers will flood faster and higher.
For high res versions of all the slides shown in the Town Hall, see this PDF.
Posted by Bob Rehak on 10/17/23
2241 Days since Hurricane Harvey