Here’s a short digest of nine flood-related items in the news this month.
Fifth Anniversary of Harvey
This month marks the fifth anniversary of Hurricane Harvey. It’s hard to pinpoint an exact day for Harvey. The system moved off of Africa on August 13, 2017. It became a tropical storm on the 17th; moved into the Gulf on the 22nd; became a Cat 4 hurricane; and made landfall at Port Aransas on the 25th. The outer bands reached Harris County on the 26th.
Harvey dumped heavy rain over Houston for four days. It started moving back offshore on the 29th and 30th. Ninety percent of the river forecast points in southeast Texas reached flood stage; forty-six percent reached new record levels. Harvey dumped more rain than any storm in the history of North America. For more information, see the Hurricane Harvey tab on the Reports Page.
West Fork San Jacinto During Harvey. Looking NE toward Kingwood from the Townsend Park N Ride.
New SJRA Director From Lake Conroe
Most flooding in the Lake Houston Area during Harvey happened after the SJRA started releasing 79,000 cubic feet per second (CFS) from Lake Conroe to save homes there. Many Lake-Houston-Area residents blamed the absence of downstream representation on the SJRA board for what they saw as disregard for their property.
After touring the extensive damage by helicopter, Governor Abbott appointed two Lake-Houston-Area residents (Kaaren Cambio and Mark Micheletti) to the seven-person board. Cambio later resigned to avoid a conflict of interest when she joined Congressman Dan Crenshaw’s staff. Last month, the Governor appointed a Lake Conroe resident to fill her vacancy, Stephanie Johnson. That now leaves Micheletti as the lone downstream representative.
Lone Star Groundwater Conservation District Elections
Sometimes it seems that the main requirements for membership on the LSGCD board are half a brain, a willingness to kiss Simon Sequiera’s ring and indifference to science. Sequiera owns Quadvest, the largest private groundwater pumping company in Montgomery County. And excessive groundwater pumping in MoCo has been linked to subsidence and flooding. But concerned citizens will have a chance to take back the LSGCD board from a slate of directors backed by Sequiera. The deadline for applying is August 22. This page on the LSGCD site is all about the election and how to file if you are interested.
Edgewater Park
Harris County Precinct 3 is trying to jumpstart the development of Edgewater Park at 59 and the San Jacinto West Fork. The county has stated it is hiring a new consultant to re-design the park and that construction could begin 1 to 2 years from now. Quiddity Engineering will get the nod. The project will provide a boat launch, an additional park for the Humble/Kingwood Area, and a connection to the Spring Creek Greenway hike and bike trail. Quiddity’s contract will cover design, engineering, and other pre-construction expenses. Quiddity is the new name for Jones and Carter.
Houston Planning & Development Department News
The Planning and Development Department has a new initiative called Livable Places. The objective: create more housing options for Houstonians. The four options they visualize all increase housing density and impervious cover. I wrote them asking, “Won’t that increase flooding?” In essence, they said, “But it may help other places stay green.” True. But that’s not going to help flooding in the City much. Wasn’t our Drainage Fee designed to provide an incentive to REDUCE impervious cover. Oh well. These are different times. Can we get our drainage fees back now?
Flood Tunnels
Harris County Flood Control District (HCFCD) released Phase 2 of its $30 billion flood tunnel study last month – along with a recommendation to study the recommendations in more detail. The current plan for Phase 3 is to spend the next 4-6 months:
Working with the Army Corps to explore possible federal involvement
Scoping the Phase 3 study
Beginning procurement.
HCFCD hopes to start Phase 3 in early 2023. Said Scott Elmer, P.E. CFM and Assistant Director of Operations for HCFCD, “We expect it to take approximately 3 years to complete.” For the complete Phase 2 study, click here.
GLO HARP Program Deadline
The Texas General Land Office (GLO) announced that applications for its Homeowner Assistance and Reimbursement Program (HARP) will close at 5 p.m. on Aug. 31, 2022. Those include applications for repairs/rebuilds from Tropical Storm Imelda in 2019. To be eligible, you must submit applications by the deadline … unless funding runs out first. So hurry.
The program includes repair or reconstruction of owner-occupied single-family homes and reimbursement up to $50,000 for certain out-of-pocket expenses incurred for reconstruction, rehabilitation, or mitigation. Repayment of SBA loans is also eligible for reimbursement.
The GLO has $71,604,000 to help residents of Harris, Chambers, Liberty, Jefferson, Montgomery, Orange, and San Jacinto counties. HARP is only available for a primary residences, not second homes. Interested homeowners should visit recovery.texas.gov/harp to apply online or download an application.
Harris County Attrition and Pay Reports
As reported in April, the loss of employees and managers in dozens of Harris County departments has created a brain drain that impacts delivery of county services. On Tuesday, 8/2/22, Commissioners considered two related reports. The first had to do with attrition. The second had to do with pay and benefits.
Commissioners did not discuss the first, but they did discuss the second at length. They also voted unanimously to have the Office of Management and Budget investigate pay disparities. Certain commissioners wanted to apply equity guidelines to low-paid employees and freeze pay for those making more. I didn’t hear the words “Pay for Performance” once during the discussion.
In the end, commissioners recommended having HR create a job architecture, pay structure, and new evaluations that would determine pay increases or freezes. More in future posts.
New Bond Package
Discussion of a new $1.2 billion bond package consumed the last 90 minutes of commissioners court this week. The County Administrator still cannot say where the money is actually needed. Commissioners Adrian Garcia and Rodney Ellis want to apply equity guidelines to this bond. And neither wants to say which projects they would spend the money on. Garcia even threatened in a previous meeting that Republican-leaning precincts would not get ANY of the money if their commissioners voted NO on the bond.
When Hidalgo suggested guidelines for distribution of the money, Garcia stomped out of the meeting. He later reluctantly agreed to a split that would give his precinct and Ellis’ $380 million each while Republican precincts would get only $220 million each.
During the debate, it came out that much of the money from the 2015 bond program still has not been spent. That raised the question, “Why do we need another bond?”
Bragging About Trickery on One Bond While Pitching Another
Also, Commissioner Rodney Ellis publicly bragged that he purposefully didn’t define “equity” in the 2018 flood bond. “It was side language,” he said. “It was not in the language that was on the ballot, but that was the side agreement we agreed to.”
Ellis later said, “Those poor neighborhoods are the ones who have gotten the short end of the process.” But the HCFCD July flood-bond update shows that Halls, Greens, White Oak, Brays and Hunting Bayou Watersheds have received $400 million out of the $1 billion spent to date from the flood bond. Twenty percent of the watersheds are getting 40% of the money. Short end?
I personally don’t plan to vote for another bond until I start seeing some benefit from the last two. Especially when there’s no guarantee how, where or on what the money will be spent. To me, this looks like a $1.2 billion dollar slush fund for Garcia and Ellis.
Posted by Bob Rehak on 8/6/22
1803 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/2018/10/KVE-2017-Flood.jpg?fit=1500%2C968&ssl=19681500adminadmin2022-08-06 19:46:432023-06-11 18:30:31August Flood Digest: Brief Summaries of Nine Items in the News
Two new updates provided to Harris County Commissioners on Tuesday 8/2/22 show progress on the 2018-flood-bond and MAAPnext slowing compared to previous estimates.
Flood-Bond Progress
In many ways, the Harris County Flood Control District (HCFCD) Flood-Bond Progress Reports are a model of government transparency. They provide detailed information, even when the news is not all good. The most recent flood-bond update showed that HCFCD:
Awarded one more construction contract during July. The count increased from 46 to 47.
Awarded 5 new agreements, down from 11 the previous month.
Spent only $8 million on bond projects including:
$1 million dollars in grant money – $368 million total up from $367 million the previous month.
$6 million in bond funds – $551 million total up from $545 the previous month.
$1 million in local funds – $141 million total up from $140 million the previous month.
Completed 0.2% more of the projects in the bond – 22% up from 21.8%.
Finished 21 more buyouts – 802 up from 781.
Stayed at .97 on the Key Performance Indicator Scale – slightly behind schedule.
Step by Step, Project by Project
Updates also show the progress of each bond project in the form of detailed GANNT charts. Check pages 4-9 to see projects in your watershed.
The next two pages show the amounts spent and funded to date in each watershed. These maps give readers a good idea of where the money goes. Draw your own conclusions and remember the map below when certain politicians tell you some watersheds don’t get anything.
The last two pages describe updates on active maintenance and construction projects with spending on each. They show that – five years after Harvey – the Lake Houston Area still has only two active capital projects in construction. Both are excavation and removal contracts for $1000 each.
Pace of Projects Slowing
From looking at these reports month after month, it feels as though the pace of activity has slowed. We’re 40% of the way through the 10-year flood bond in terms of time, but only 22% complete. The gap is getting wider. Worse…
At the rate of $8 million per month, it would take 500 months to spend the next $4 billion in the bond.
That’s more than 40 years, not the 10 originally planned. We need explanation. But HCFCD executives were not immediately available to provide it due to travel schedules. I will follow up.
The timeline has slipped three months. In earlier updates, HCFCD indicated new maps would be released in spring/summer this year. Now, the target has slipped to summer/fall. A large portion of the update consisted of trying to explain why. In a sentence, “We’re waiting on FEMA.”
So I tried contacting FEMA. But FEMA could not provide a more precise estimate.
Harris County followed standard practice by submitting its findings to FEMA prior to public release. FEMA is currently reviewing all data and models. It is also producing preliminary Flood Insurance Rate Maps (FIRMS) based on those models. The data will help determine flood insurance premiums as FEMA moves to an actuarial-based system called Risk Rating 2.0.
Next Steps
When FEMA is ready, it will first brief community officials and floodplain administrators, and give them access to preliminary data. Shortly thereafter, FEMA and HCFCD will hold a series of open houses to brief the public. Public comment periods and appeals follow.
So, at best, the new maps will be released in 2024, seven years after Harvey. That’s fairly consistent with the length of time it took to finalize new flood maps after Tropical Storm Allison in 2001. Those maps became official on 6/17/2007.
But this process is far more complex because of Risk Rating 2.0. It includes individual flood-risk assessments for millions of homes. And that risk assessment will now also include street flooding, not just coastal and riverine flooding.
Posted by Bob Rehak on 8/5/2022
1802 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2022/08/20220804-Screen-Shot-2022-08-04-at-4.39.46-PM.jpg?fit=1200%2C915&ssl=19151200adminadmin2022-08-05 15:59:242022-08-05 18:52:26Flood Bond, MAAPnext Updates Show Projects Slowing
Initial options that the City of Houston explored for adding more flood gates to the Lake Houston Dam struggled to achieve a high enough Benefit/Cost Ratio. However, all parties involved are still hopeful that a solution can be found. They are now evaluating yet another option. It would add gates in the earthen (eastern) portion of the dam.
Looking south over eastern portion of Lake Houston Dam at area under consideration for five new tainter gates. The spillway is out of frame to the right.Picture taken on 7/22/22.
More Gates Would Create More Room For Floodwaters
Flooding devasted the entire Lake Houston Area during Harvey. Since then, Mayor Pro Tem Dave Martin has led an effort to find a way to lower the lake faster in advance of a storm. This would create extra room in the lake for floodwaters. And that would reduce the risk of flooding homes and businesses around it.
Currently, the dam has a fixed height spillway. That makes releasing water in advance of a storm difficult. The dam does have several small gates, but they have only 1/15th the release capacity of the gates on Lake Conroe. Adding more gates would help release water faster…to keep up with water coming downstream.
It would also let managers wait to start a release until they were certain a storm would not veer away. That would help avoid wasting water if forecasts are not accurate.
The Dual-Role Dilemma
The City built Lake Houston in 1953 to supply water. Making the dam play two roles – water supply and flood mitigation – poses a challenge.
In 2017, immediately after Hurricane Harvey, Martin began leading the effort to transform the dam to play a dual role. This would let Lake Houston provide our region with needed drinking water and reduce flood risk.
New Timeline Longer Than Hoped, But Still Shorter Than Usual
A project of this magnitude normally takes up to twelve years. However, Martin worked with federal, state, and local officials to shorten the timeline. Martin now hopes the project will take no longer than seven years. While acknowledging that he hoped completion would happen in as little as five years, Martin also cites unexpected technical and cost challenges related to the aging dam.
As engineers started precisely calculating costs and benefits of preferred approaches, they weighed those against environmental impacts, construction challenges, safety risks, and available budget.
During that process, engineers discovered hidden challenges with some options that initially looked promising. At this point, they have determined that all six initial options cost more than the federally funded amount of $48 million.
A Complicated Path Forward
So now engineers are focusing on finding the optimal solution while Martin and others explore options to pay for it.
Martin says the City of Houston, Texas Division of Emergency Management and Federal Emergency Management Agency are working together to find the option with the highest Benefit to Cost Ratio (BCR).
Acceptable BCRs for projects like this range from .75 to 1, according to Martin. Preliminary engineering studies found that two crest-gate alternatives (already evaluated) yielded only .48 – largely due to the aging structure of the existing spillway, which drove up costs.
City Expects Answer on Latest Option Before October
Currently, the City has paused the final-design phase of the project while engineers evaluate Alternative 1A. That now consists of five new tainter-gates (not six or twelve as previously reported) on the earthen embankment east of the spillway.
While engineers work to find the best BCR, Martin is leading an effort with BOTH state and federal partners to find additional funding for the project.
For instance, Martin is working with outgoing State Representative Dan Huberty and incoming State Representative Charles Cunningham to seek funds in the upcoming Texas Legislative Session. Martin says that state dollars do not require BCRs like federal dollars do.
While all the challenges would have discouraged many, Martin says they have fortified his resolve. He vows to find a path forward. Martin promises an update in his regular fall public meeting in October and hopes to have an attractive BCR for alternative 1A.
Interim Flood-Mitigation Measures Still In Place
In the meantime, the City of Houston will continue its existing Lake Houston pre-release strategy. It calls for lowering the lake when forecasters predict three or more inches of rain in the San Jacinto Watershed. Since Hurricane Harvey, the City has lowered the lake more than twenty times and successfully avoided flooding.
Thanks to Key Contributors
Martin acknowledges the continuing contributions of Congressman Dan Crenshaw, Governor Greg Abbott, Lt. Governor Dan Patrick, Commissioner Tom Ramsey, State Representative Dan Huberty, State Representative-Elect Charles Cunningham, TDEM-Chief Nim Kidd, Mayor Sylvester Turner, Chief Recovery Officer Stephen Costello, and Harris County Flood Control District.
Martin says, “All parties are committed to constructing these additional gates to help ensure protection against future flood events.”
Posted by Bob Rehak on 8/4/2022
1801 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2022/08/20220722-RJR_0780-1.jpg?fit=1200%2C800&ssl=18001200adminadmin2022-08-04 18:10:242022-08-04 18:17:52All Parties Still Focused on Finding Solution for Adding Flood Gates to Lake Houston Dam
August Flood Digest: Brief Summaries of Nine Items in the News
Here’s a short digest of nine flood-related items in the news this month.
Fifth Anniversary of Harvey
This month marks the fifth anniversary of Hurricane Harvey. It’s hard to pinpoint an exact day for Harvey. The system moved off of Africa on August 13, 2017. It became a tropical storm on the 17th; moved into the Gulf on the 22nd; became a Cat 4 hurricane; and made landfall at Port Aransas on the 25th. The outer bands reached Harris County on the 26th.
Harvey dumped heavy rain over Houston for four days. It started moving back offshore on the 29th and 30th. Ninety percent of the river forecast points in southeast Texas reached flood stage; forty-six percent reached new record levels. Harvey dumped more rain than any storm in the history of North America. For more information, see the Hurricane Harvey tab on the Reports Page.
New SJRA Director From Lake Conroe
Most flooding in the Lake Houston Area during Harvey happened after the SJRA started releasing 79,000 cubic feet per second (CFS) from Lake Conroe to save homes there. Many Lake-Houston-Area residents blamed the absence of downstream representation on the SJRA board for what they saw as disregard for their property.
After touring the extensive damage by helicopter, Governor Abbott appointed two Lake-Houston-Area residents (Kaaren Cambio and Mark Micheletti) to the seven-person board. Cambio later resigned to avoid a conflict of interest when she joined Congressman Dan Crenshaw’s staff. Last month, the Governor appointed a Lake Conroe resident to fill her vacancy, Stephanie Johnson. That now leaves Micheletti as the lone downstream representative.
Lone Star Groundwater Conservation District Elections
Sometimes it seems that the main requirements for membership on the LSGCD board are half a brain, a willingness to kiss Simon Sequiera’s ring and indifference to science. Sequiera owns Quadvest, the largest private groundwater pumping company in Montgomery County. And excessive groundwater pumping in MoCo has been linked to subsidence and flooding. But concerned citizens will have a chance to take back the LSGCD board from a slate of directors backed by Sequiera. The deadline for applying is August 22. This page on the LSGCD site is all about the election and how to file if you are interested.
Edgewater Park
Harris County Precinct 3 is trying to jumpstart the development of Edgewater Park at 59 and the San Jacinto West Fork. The county has stated it is hiring a new consultant to re-design the park and that construction could begin 1 to 2 years from now. Quiddity Engineering will get the nod. The project will provide a boat launch, an additional park for the Humble/Kingwood Area, and a connection to the Spring Creek Greenway hike and bike trail. Quiddity’s contract will cover design, engineering, and other pre-construction expenses. Quiddity is the new name for Jones and Carter.
Houston Planning & Development Department News
The Planning and Development Department has a new initiative called Livable Places. The objective: create more housing options for Houstonians. The four options they visualize all increase housing density and impervious cover. I wrote them asking, “Won’t that increase flooding?” In essence, they said, “But it may help other places stay green.” True. But that’s not going to help flooding in the City much. Wasn’t our Drainage Fee designed to provide an incentive to REDUCE impervious cover. Oh well. These are different times. Can we get our drainage fees back now?
Flood Tunnels
Harris County Flood Control District (HCFCD) released Phase 2 of its $30 billion flood tunnel study last month – along with a recommendation to study the recommendations in more detail. The current plan for Phase 3 is to spend the next 4-6 months:
HCFCD hopes to start Phase 3 in early 2023. Said Scott Elmer, P.E. CFM and Assistant Director of Operations for HCFCD, “We expect it to take approximately 3 years to complete.” For the complete Phase 2 study, click here.
GLO HARP Program Deadline
The Texas General Land Office (GLO) announced that applications for its Homeowner Assistance and Reimbursement Program (HARP) will close at 5 p.m. on Aug. 31, 2022. Those include applications for repairs/rebuilds from Tropical Storm Imelda in 2019. To be eligible, you must submit applications by the deadline … unless funding runs out first. So hurry.
The program includes repair or reconstruction of owner-occupied single-family homes and reimbursement up to $50,000 for certain out-of-pocket expenses incurred for reconstruction, rehabilitation, or mitigation. Repayment of SBA loans is also eligible for reimbursement.
The GLO has $71,604,000 to help residents of Harris, Chambers, Liberty, Jefferson, Montgomery, Orange, and San Jacinto counties. HARP is only available for a primary residences, not second homes. Interested homeowners should visit recovery.texas.gov/harp to apply online or download an application.
Harris County Attrition and Pay Reports
As reported in April, the loss of employees and managers in dozens of Harris County departments has created a brain drain that impacts delivery of county services. On Tuesday, 8/2/22, Commissioners considered two related reports. The first had to do with attrition. The second had to do with pay and benefits.
Commissioners did not discuss the first, but they did discuss the second at length. They also voted unanimously to have the Office of Management and Budget investigate pay disparities. Certain commissioners wanted to apply equity guidelines to low-paid employees and freeze pay for those making more. I didn’t hear the words “Pay for Performance” once during the discussion.
In the end, commissioners recommended having HR create a job architecture, pay structure, and new evaluations that would determine pay increases or freezes. More in future posts.
New Bond Package
Discussion of a new $1.2 billion bond package consumed the last 90 minutes of commissioners court this week. The County Administrator still cannot say where the money is actually needed. Commissioners Adrian Garcia and Rodney Ellis want to apply equity guidelines to this bond. And neither wants to say which projects they would spend the money on. Garcia even threatened in a previous meeting that Republican-leaning precincts would not get ANY of the money if their commissioners voted NO on the bond.
When Hidalgo suggested guidelines for distribution of the money, Garcia stomped out of the meeting. He later reluctantly agreed to a split that would give his precinct and Ellis’ $380 million each while Republican precincts would get only $220 million each.
During the debate, it came out that much of the money from the 2015 bond program still has not been spent. That raised the question, “Why do we need another bond?”
Bragging About Trickery on One Bond While Pitching Another
Also, Commissioner Rodney Ellis publicly bragged that he purposefully didn’t define “equity” in the 2018 flood bond. “It was side language,” he said. “It was not in the language that was on the ballot, but that was the side agreement we agreed to.”
Ellis later said, “Those poor neighborhoods are the ones who have gotten the short end of the process.” But the HCFCD July flood-bond update shows that Halls, Greens, White Oak, Brays and Hunting Bayou Watersheds have received $400 million out of the $1 billion spent to date from the flood bond. Twenty percent of the watersheds are getting 40% of the money. Short end?
I personally don’t plan to vote for another bond until I start seeing some benefit from the last two. Especially when there’s no guarantee how, where or on what the money will be spent. To me, this looks like a $1.2 billion dollar slush fund for Garcia and Ellis.
Posted by Bob Rehak on 8/6/22
1803 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.
Flood Bond, MAAPnext Updates Show Projects Slowing
Two new updates provided to Harris County Commissioners on Tuesday 8/2/22 show progress on the 2018-flood-bond and MAAPnext slowing compared to previous estimates.
Flood-Bond Progress
In many ways, the Harris County Flood Control District (HCFCD) Flood-Bond Progress Reports are a model of government transparency. They provide detailed information, even when the news is not all good. The most recent flood-bond update showed that HCFCD:
Step by Step, Project by Project
Updates also show the progress of each bond project in the form of detailed GANNT charts. Check pages 4-9 to see projects in your watershed.
Watershed by Watershed
The next two pages show the amounts spent and funded to date in each watershed. These maps give readers a good idea of where the money goes. Draw your own conclusions and remember the map below when certain politicians tell you some watersheds don’t get anything.
Active Construction
The last two pages describe updates on active maintenance and construction projects with spending on each. They show that – five years after Harvey – the Lake Houston Area still has only two active capital projects in construction. Both are excavation and removal contracts for $1000 each.
Pace of Projects Slowing
From looking at these reports month after month, it feels as though the pace of activity has slowed. We’re 40% of the way through the 10-year flood bond in terms of time, but only 22% complete. The gap is getting wider. Worse…
That’s more than 40 years, not the 10 originally planned. We need explanation. But HCFCD executives were not immediately available to provide it due to travel schedules. I will follow up.
MAAPnext Progress
MAAPnext is the county’s effort to update flood-risk maps in the wake of Harvey. There’s not much new to report.
The timeline has slipped three months. In earlier updates, HCFCD indicated new maps would be released in spring/summer this year. Now, the target has slipped to summer/fall. A large portion of the update consisted of trying to explain why. In a sentence, “We’re waiting on FEMA.”
So I tried contacting FEMA. But FEMA could not provide a more precise estimate.
Harris County followed standard practice by submitting its findings to FEMA prior to public release. FEMA is currently reviewing all data and models. It is also producing preliminary Flood Insurance Rate Maps (FIRMS) based on those models. The data will help determine flood insurance premiums as FEMA moves to an actuarial-based system called Risk Rating 2.0.
Next Steps
When FEMA is ready, it will first brief community officials and floodplain administrators, and give them access to preliminary data. Shortly thereafter, FEMA and HCFCD will hold a series of open houses to brief the public. Public comment periods and appeals follow.
So, at best, the new maps will be released in 2024, seven years after Harvey. That’s fairly consistent with the length of time it took to finalize new flood maps after Tropical Storm Allison in 2001. Those maps became official on 6/17/2007.
But this process is far more complex because of Risk Rating 2.0. It includes individual flood-risk assessments for millions of homes. And that risk assessment will now also include street flooding, not just coastal and riverine flooding.
Posted by Bob Rehak on 8/5/2022
1802 Days since Hurricane Harvey
All Parties Still Focused on Finding Solution for Adding Flood Gates to Lake Houston Dam
Initial options that the City of Houston explored for adding more flood gates to the Lake Houston Dam struggled to achieve a high enough Benefit/Cost Ratio. However, all parties involved are still hopeful that a solution can be found. They are now evaluating yet another option. It would add gates in the earthen (eastern) portion of the dam.
More Gates Would Create More Room For Floodwaters
Flooding devasted the entire Lake Houston Area during Harvey. Since then, Mayor Pro Tem Dave Martin has led an effort to find a way to lower the lake faster in advance of a storm. This would create extra room in the lake for floodwaters. And that would reduce the risk of flooding homes and businesses around it.
Currently, the dam has a fixed height spillway. That makes releasing water in advance of a storm difficult. The dam does have several small gates, but they have only 1/15th the release capacity of the gates on Lake Conroe. Adding more gates would help release water faster…to keep up with water coming downstream.
It would also let managers wait to start a release until they were certain a storm would not veer away. That would help avoid wasting water if forecasts are not accurate.
The Dual-Role Dilemma
The City built Lake Houston in 1953 to supply water. Making the dam play two roles – water supply and flood mitigation – poses a challenge.
In 2017, immediately after Hurricane Harvey, Martin began leading the effort to transform the dam to play a dual role. This would let Lake Houston provide our region with needed drinking water and reduce flood risk.
New Timeline Longer Than Hoped, But Still Shorter Than Usual
A project of this magnitude normally takes up to twelve years. However, Martin worked with federal, state, and local officials to shorten the timeline. Martin now hopes the project will take no longer than seven years. While acknowledging that he hoped completion would happen in as little as five years, Martin also cites unexpected technical and cost challenges related to the aging dam.
Difficulty of Finding Best Alternative
The age of the Lake Houston Spillway, built in 1953, has proven to be a bigger obstacle than expected. Engineers initially proposed six different alternatives for adding different types of gates in different locations, with variations on several.
During that process, engineers discovered hidden challenges with some options that initially looked promising. At this point, they have determined that all six initial options cost more than the federally funded amount of $48 million.
A Complicated Path Forward
So now engineers are focusing on finding the optimal solution while Martin and others explore options to pay for it.
Martin says the City of Houston, Texas Division of Emergency Management and Federal Emergency Management Agency are working together to find the option with the highest Benefit to Cost Ratio (BCR).
Acceptable BCRs for projects like this range from .75 to 1, according to Martin. Preliminary engineering studies found that two crest-gate alternatives (already evaluated) yielded only .48 – largely due to the aging structure of the existing spillway, which drove up costs.
City Expects Answer on Latest Option Before October
Currently, the City has paused the final-design phase of the project while engineers evaluate Alternative 1A. That now consists of five new tainter-gates (not six or twelve as previously reported) on the earthen embankment east of the spillway.
The comprehensive, final BCR analysis for the embankment alternative should be completed by the end of September 2022. The preliminary engineering report suggested the 1A alternative could reduce flood heights by half a foot for a cost of $47.3 million with a BCR of .89. So initially, on the surface, this appears feasible.
Martin Widens Search for Funding
While engineers work to find the best BCR, Martin is leading an effort with BOTH state and federal partners to find additional funding for the project.
For instance, Martin is working with outgoing State Representative Dan Huberty and incoming State Representative Charles Cunningham to seek funds in the upcoming Texas Legislative Session. Martin says that state dollars do not require BCRs like federal dollars do.
While all the challenges would have discouraged many, Martin says they have fortified his resolve. He vows to find a path forward. Martin promises an update in his regular fall public meeting in October and hopes to have an attractive BCR for alternative 1A.
Interim Flood-Mitigation Measures Still In Place
In the meantime, the City of Houston will continue its existing Lake Houston pre-release strategy. It calls for lowering the lake when forecasters predict three or more inches of rain in the San Jacinto Watershed. Since Hurricane Harvey, the City has lowered the lake more than twenty times and successfully avoided flooding.
Thanks to Key Contributors
Martin acknowledges the continuing contributions of Congressman Dan Crenshaw, Governor Greg Abbott, Lt. Governor Dan Patrick, Commissioner Tom Ramsey, State Representative Dan Huberty, State Representative-Elect Charles Cunningham, TDEM-Chief Nim Kidd, Mayor Sylvester Turner, Chief Recovery Officer Stephen Costello, and Harris County Flood Control District.
Martin says, “All parties are committed to constructing these additional gates to help ensure protection against future flood events.”
Posted by Bob Rehak on 8/4/2022
1801 Days since Hurricane Harvey