At the current rate that crews are removing sand from the West Fork San Jacinto Mouth Bar, the remainder of the above-water portion of this once-behemoth sand bar could be gone by Christmas. See the two pictures below. The first taken after Harvey and the second taken today.
These two shots show the West Fork mouth bar two weeks after Harvey and today…more than three years later.
Much Yet to Dredge
Of course, even when the above water portion of the Mouth Bar is removed, that will still leave a huge portion below the surface. However, all progress is welcome.
Like an iceberg, most of a sand bar exists below the waterline.Photo taken 10/26/2020.I can’t say with certainty that this is submerged sand, or water stirred up by dredging. It seems too uniform to be the latter. Compare the picture below looking toward the WLHP bridge from a slightly different position and note how irregular the stirred-up sediment looks.Also note that the picture above was taken upstream from the current dredging.
At the start of October, the above-water (sub-aerial) extent of the mouth bar was down to the width of one excavator. Two excavators are now working toward the middle from each end. See below.
Looking WNW toward the West Lake Houston Parkway Bridge and Kings Harbor.Taken 10/26/2020.
From the wet mark on this excavator’s arm, it looks as though they are excavating up to 10 feet below the waterline. The 10-foot estimate closely agrees with the profile chart below.Taken 10/26/2020.
Like an Iceberg, Most of a Sand Bar Exists Below Water
That’s significant progress given what we started with. But much sand remains below the surface.
Tim Garfield and RD Kissling, two leading geologists now retired from one of the world’s largest oil companies, mapped the depth of the river using sonar and depth poles. They found an underwater plateau exists in this region of the river. See chart below.
The blue line represents the water surface. The gold line indicates the deepest part of the channel as you move downstream from the WLHP bridge to the FM1960 bridge. Numbers on the left scale indicate water depth. Numbers on the bottom scale indicate distance in feet downstream from the WLHP bridge.
Plans for Next Phase Still Not Revealed
FEMA has approved dredging another million cubic yards. And Dan Huberty’s amendment to SB500 in the last legislature dedicated $30 million for dredging the West Fork Mouth Bar. The City is drawing up plans, but they have not been announced yet. The last time I talked to Stephen Costello about this, he said the City was leaning toward dredging a channel somewhere south of the mouth bar. But many details remained to be worked out, such as:
Method of dredging (hydraulic vs. mechanical)
Exact location
Channel width
Finding qualified contractors
Bidding
Determining a suitable placement area, etc.
More news when its available.
Posted by Bob Rehak on 10/26/2020
1154 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/2020/10/BeforeNow.jpg?fit=1200%2C1200&ssl=112001200adminadmin2020-10-26 17:09:182020-10-26 17:09:22Above-Water Portion of Mouth Bar Could Be Gone by Christmas
Since June, I’ve posted about problems in the Colony Ridge development in Liberty County. Among them: the washout of FM1010 where it crosses over Rocky Branch. Authorities have closed the busy road which provides access to Colony Ridge for three years, forcing tens of thousands of residents to seek alternate access routes, such as FM1485 and FM2090.
However, it’s difficult to see all the damage. So today I took a drone and captured some previously unseen details.
Colony Ridge drainage ditch leading to Rocky Branch contributed to washing out FM1010 at far end of ditch.
Lack of Functional Detention Capacity Likely Contributed to Washout
The damage is likely the result of inadequate, poorly engineered, or poorly maintained detention. Another contributing factor: a steep drop in elevation as water leaves the massive ditch (see above) in Colony Ridge and descends through a wooded area toward FM1010. That drop accelerated more water than should have been traveling down Rocky Branch, an East Fork San Jacinto tributary. As a result, floodwaters swept trees and other debris downstream.
One Thing Leads to Another
The debris:
Clogged culverts under the road…
Then, when the roadbed became a dam…
…Water churned through the roadbed next to the culverts…
…And deposited more “beaver dams” downstream…
…that, in turn, contributed to the flooding of surrounding homes.
Years of Neglect Still Ignored
Amazingly, no one in Liberty County corrected these problems after Harvey. As a result, many homes flooded again in 2019, during heavy downpours on May 7th and September 19th. The problems still have not been fixed. See the pictures below. I took them this afternoon.
Just yesterday, I had lunch with a couple who were considering moving to Liberty County because they were seeking a quieter lifestyle. I told them about this story. They are reconsidering.
FM1010 Washout at Rocky Branch has not been repaired for more than three years. Note flood debris clogged in culvert. Also note straps around logs!
“Beaver dam” just downstream from culverts is building up and up, contributing to additional flooding.
Not All Business is Good Business
Colony Ridge has grown into the world’s largest trailer park in less than a decade. It brought more than its fair share of problems:
Legendary traffic backups – even on Sunday afternoons.
A hard lesson for some people to learn is that not all business is good business. Lax enforcement of regulations allowed Colony Ridge to grow out of control. Now county commissioners have a nightmare on their hands, cannot fix their problems, and cannot enforce their own regulations.
Posted by Bob Rehak on 10/25/2020
1153 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/2020/10/20201025-DJI_0919.jpg?fit=1200%2C900&ssl=19001200adminadmin2020-10-25 21:08:132020-10-25 23:49:28New Drone Shots Reveal Need for Better Flood Control in Liberty County
Hurricane Watches issued for eastern and northern coasts of the Yucatan peninsula.
(Sunday 8am, October 25, 2020) The tropical depression over the northwestern Caribbean Sea has continued to slowly become better organized. Satellite and hurricane hunter aircraft have determined that winds increased to near 40kts. Overall Zeta has not moved much in the last 12 hours. However, Zeta should approach the Gulf Coast Tuesday night or Wednesday. It will bring storm surge, rainfall and wind impacts from Louisiana to the Florida panhandle. The storm poses no immediate threat to the Houston Area.
Track
Zeta will have little forward motion for the next 12 hours; steering flow is weak. However, on Monday mid-level high pressure will begin to build westward letting Zeta turn NW and WNW, and to increase forward motion. Global model guidance is in good agreement on this track. Zeta will then enter the southern Gulf of Mexico. A strong cold front will push south and east across the Great Plains by mid-week. and turn Zeta north and likely northeast toward the central or eastern US Gulf coast. However, much uncertainty exists on how sharply Zeta will turn. The storm could make landfall anywhere from Louisiana to the Florida panhandle.
Intensity
Overall Zeta is in a favorable environment for development. Zeta could approach hurricane intensity as it nears the Yucatan. Once in the Gulf of Mexico conditions continue to look favorable for intensification. Zeta will likely regain or maintain hurricane intensity.
However, as Zeta begins to turn northward toward the central Gulf, cooler sea surface temperatures and increasing vertical wind shear should weaken the system. No one knows at present how quickly weakening may occur.
A slight chance exists that tropical storm force winds could extend into areas east of Houston and Galveston Bay.
NOAA/NESDIS/STAR GOES ABI BAND 13 shows Zeta’s intensity building in the NW Caribbean.
Posted by Bob Rehak on 10/25/2020 based on information from Jeff Lindner, HCFCD, and the National Hurricane Center
1153 Days after Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/10/image002.png?fit=897%2C736&ssl=1736897adminadmin2020-10-25 09:51:202020-10-25 10:01:47It’s Official; Zeta, Yet Another Tropical Storm Forms
Above-Water Portion of Mouth Bar Could Be Gone by Christmas
At the current rate that crews are removing sand from the West Fork San Jacinto Mouth Bar, the remainder of the above-water portion of this once-behemoth sand bar could be gone by Christmas. See the two pictures below. The first taken after Harvey and the second taken today.
Much Yet to Dredge
Of course, even when the above water portion of the Mouth Bar is removed, that will still leave a huge portion below the surface. However, all progress is welcome.
At the start of October, the above-water (sub-aerial) extent of the mouth bar was down to the width of one excavator. Two excavators are now working toward the middle from each end. See below.
Like an Iceberg, Most of a Sand Bar Exists Below Water
That’s significant progress given what we started with. But much sand remains below the surface.
Tim Garfield and RD Kissling, two leading geologists now retired from one of the world’s largest oil companies, mapped the depth of the river using sonar and depth poles. They found an underwater plateau exists in this region of the river. See chart below.
Plans for Next Phase Still Not Revealed
FEMA has approved dredging another million cubic yards. And Dan Huberty’s amendment to SB500 in the last legislature dedicated $30 million for dredging the West Fork Mouth Bar. The City is drawing up plans, but they have not been announced yet. The last time I talked to Stephen Costello about this, he said the City was leaning toward dredging a channel somewhere south of the mouth bar. But many details remained to be worked out, such as:
More news when its available.
Posted by Bob Rehak on 10/26/2020
1154 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.
New Drone Shots Reveal Need for Better Flood Control in Liberty County
Since June, I’ve posted about problems in the Colony Ridge development in Liberty County. Among them: the washout of FM1010 where it crosses over Rocky Branch. Authorities have closed the busy road which provides access to Colony Ridge for three years, forcing tens of thousands of residents to seek alternate access routes, such as FM1485 and FM2090.
However, it’s difficult to see all the damage. So today I took a drone and captured some previously unseen details.
Lack of Functional Detention Capacity Likely Contributed to Washout
The damage is likely the result of inadequate, poorly engineered, or poorly maintained detention. Another contributing factor: a steep drop in elevation as water leaves the massive ditch (see above) in Colony Ridge and descends through a wooded area toward FM1010. That drop accelerated more water than should have been traveling down Rocky Branch, an East Fork San Jacinto tributary. As a result, floodwaters swept trees and other debris downstream.
One Thing Leads to Another
The debris:
Years of Neglect Still Ignored
Amazingly, no one in Liberty County corrected these problems after Harvey. As a result, many homes flooded again in 2019, during heavy downpours on May 7th and September 19th. The problems still have not been fixed. See the pictures below. I took them this afternoon.
Just yesterday, I had lunch with a couple who were considering moving to Liberty County because they were seeking a quieter lifestyle. I told them about this story. They are reconsidering.
Not All Business is Good Business
Colony Ridge has grown into the world’s largest trailer park in less than a decade. It brought more than its fair share of problems:
Posted by Bob Rehak on 10/25/2020
1153 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.
It’s Official; Zeta, Yet Another Tropical Storm Forms
Hurricane Watches issued for eastern and northern coasts of the Yucatan peninsula.
(Sunday 8am, October 25, 2020) The tropical depression over the northwestern Caribbean Sea has continued to slowly become better organized. Satellite and hurricane hunter aircraft have determined that winds increased to near 40kts. Overall Zeta has not moved much in the last 12 hours. However, Zeta should approach the Gulf Coast Tuesday night or Wednesday. It will bring storm surge, rainfall and wind impacts from Louisiana to the Florida panhandle. The storm poses no immediate threat to the Houston Area.
Track
Zeta will have little forward motion for the next 12 hours; steering flow is weak. However, on Monday mid-level high pressure will begin to build westward letting Zeta turn NW and WNW, and to increase forward motion. Global model guidance is in good agreement on this track. Zeta will then enter the southern Gulf of Mexico. A strong cold front will push south and east across the Great Plains by mid-week. and turn Zeta north and likely northeast toward the central or eastern US Gulf coast. However, much uncertainty exists on how sharply Zeta will turn. The storm could make landfall anywhere from Louisiana to the Florida panhandle.
Intensity
Overall Zeta is in a favorable environment for development. Zeta could approach hurricane intensity as it nears the Yucatan. Once in the Gulf of Mexico conditions continue to look favorable for intensification. Zeta will likely regain or maintain hurricane intensity.
However, as Zeta begins to turn northward toward the central Gulf, cooler sea surface temperatures and increasing vertical wind shear should weaken the system. No one knows at present how quickly weakening may occur.
Posted by Bob Rehak on 10/25/2020 based on information from Jeff Lindner, HCFCD, and the National Hurricane Center
1153 Days after Hurricane Harvey