We learned a little bit more this week about the next phase of dredging. Several graphics (below) released by the Corps summarize modifications to the Emergency West Fork Debris Removal Project.
What We Confirmed and Learned
We confirmed that:
Great Lakes, the prime contractor on the original job, will be the only contractor on the Corps portion of the contract extension
Great Lakes will pump sediment all the way upstream to Placement Area 2
The Corps intends to dredge 500,000 cubic yards in the area of the mouth bar.
We learned that:
The original contract contingency allotment of approximately $3.5 million was used up, most likely by additional sediment washed downstream during floods in December, January, February, May and June.
Callan, the subcontractor for phase one, has approximately 83,000 cubic yards to dredge due to modification of the original contract.
Dredging an additional 500,000 cubic yards will cost another $17,085,861
The FEMA/Corps portion of the dredging should finish by December 6, 2019
Demobilization and cleanup will take until Jan. 22, 2020
This is FEMA mission assignment SWD-30
Great Lakes started dredging the mouth bar on June 25th
Great Lakes will dredge a wide area but not go all the way to the FM1960 bridge.
Corps Releases Summary of Project and Extension(s)
I compiled the information above from a PDF developed by The Army Corps. They released it on July 9.
First page of a 2-page PDF released by the Corps on July 9.Second page of a 2-page PDF. Army Corps summary of Emergency West Fork Dredging project. For a high-resolution PDF, click here.
To calculate the depth of dredging in that blue area to the right, I simulated the outline in Google Earth and found that it roughly equals 500,000 square yards. That means if they dredge this whole area, they will reduce the river bed by approximately 3 feet. The area already averages 2-3 feet deep. That means the river will be roughly 6 feet deep through this reach when the Corps finishes its portion of the job.
The area outlined by Corps is approximately 500,000 square yards. Where Callan will finish dredging near Kings Harbor, the depth will be approximately 22.5 feet.
However, upstream, Callan is dredging to a depth of 22.5 feet. Thus, creating a continuous gradient along the river bottom would require dredging approximately another 16 feet deeper in the same area…and that wouldn’t even get you to the FM1960 bridge. Also, note the gap in the graphic between where Callan will finish its portion of Phase One and Great Lakes will start mouth bar dredging.
Unknowns
It is unclear at this point who will dredge the rest of the material that needs to be removed to restore conveyance of the West Fork. Neither the City, County, nor State have yet announced their plans. We don’t know:
Where they will dredge
How deep they will go
Where they will place the material
How much it will all cost, or
When they plan to do it.
In the meantime, here are two dramatic sequences of photos plus a video submitted by readers this week. They show what the start of mouth bar dredging looked like from the air and water.
Carolyn Daniel Mouth Bar Shots from Airplane Landing at IAH
Carolyn Daniel submitted these shots of the mouth bar and dredging activity taken from her airplane window while on a landing approach to Bush Intercontinental Airport.
On approach to IAH. FM 1960 at bottom of frame. East Fork of San Jacinto upper right and West Fork on the left. Kings Point and Royal Shores between them. Image courtesy of Carolyn Daniel.
Can you spot East End Park? Kingwood Drive? Town Center? All are visible in this shot by Carolyn Daniel.
Mouth bar of west fork with dredge. Photo courtesy of Carolyn Daniel.Note the large Triple-P sand mine near the top of the frame in Porter.
Mouth bar of San Jacinto West Fork with Great Lakes Dredge. Image courtesy of Carolyn Daniel.
Mouth bar of West Fork with dredge. Atascocita Point on left in foreground. Fosters Mill and Kings Point in background.Photo Courtesy of Carolyn Daniel.
Through the clouds. While landing at Bush Intercontinental Airport. Mouth bar of San Jacinto West Fork with Great Lakes Dredge. Image courtesy of Carolyn Daniel.
Franz Willette runs a company called BCAeronautics that uses drones in mapping, inspections, roofing analyses, site surveys, and 3D modeling. He did not have clouds to contend with and could shoot safely from a much lower elevation. Willette is FAA certified.
West Fork Mouth Bar with Great Lakes Dredge. Drone image courtesy of Franz Willette, BCAeronautics.West Fork Mouth Bar with Great Lakes Dredge. Drone image courtesy of Franz Willette, BCAeronautics.Great Lakes should dredge those two small islands in the background.West Fork Mouth Bar with Great Lakes Dredge. Looking south toward the FM1960 Bridge. Drone image courtesy of Franz Willette, BCAeronautics.West Fork Mouth Bar with Great Lakes Dredge. Drone image courtesy of Franz Willette, BCAeronautics.
Kendall Taft Video
Video courtesy of Kendall Taft. Shot from south of mouth bar looking north. Shows how shallow the water is and how vast the expanse is.
I hope to post updates weekly on this project. So readers, please help. Submit your images through the submissions page of this web site. My thanks to Carolyn Daniel, Franz Willette, BCAeronautics and Kendall Taft.
Posted by Bob Rehak on 7/13/2019with help from Carolyn Daniel, Franz Willette, BCAeronautics and Kendall Taft.
683 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/07/BCAeronautics-Mouth-Bar-2.jpg?fit=1500%2C1125&ssl=111251500adminadmin2019-07-12 22:43:452019-07-12 22:47:22Weekly Mouth Bar Dredging Update with Images from Carolyn Daniel, Kendall Taft, Franz Willette of BCAeronautics, and the Army Corps
According to Beth Walters of the Harris County Flood Control District (HCFCD), work on the upstream portion of Taylor Gully in Kingwood will begin on Monday, July 15, weather permitting. There’s still uncertainty regarding the local impact of Tropical Storm Barry, however, equipment has already started showing up at the job site.
Taylor Gully at the county line is half blocked with silt due to erosion from the clearcut area in the Woodridge Village development behind this culvert.Photo courtesy of Jeff Miller.
From Bassingham to Harris County Line
The work will extend from Bassingham to the Harris County line where the Gully meets the new Woodridge Village development in Montgomery County.
Scope of Work
This work will include the following:
Desilt the channel
Reconstruct the backslope interceptor structures
Install new backslope interceptor pipes
Regrade backslope swales
Install new gates
Install new “No Trespassing Signs”
Re-Set the covers of the “E type” inlets that have been damaged
Next Steps
After completing this reach of the channel, HCFCD staff will investigate Taylor Gully further downstream, where HCFCD completed a desilt job in the spring of 2019, from Bassingham to the downstream end. HCFCD will open up any constrictions and desilt the channel if necessary.
Vital for Flood Mitigation
Approximately 200 homes near this channel flooded during the May 7th storm. According to residents, video taken during the storm, and still photos taken after the storm, overland sheet flow from Woodridge Village was the likely cause of their problems. Regardless, news of this effort will come as a great relief to Elm Grove and Woodstream residents who welcome every extra margin of safety they can get.
Kudos to the flood control district for jumping on this project. Commissioners Court approved the right of way acquisition only last Tuesday!
Work on Montgomery County Portion of Gully Also Proceeding
Elm Grove resident Jeff Miller also reported today that Woodridge has expanded a portion of Taylor Gully that runs through Montgomery County. Where the east/west portion of the ditch makes a 120 degree turn and starts heading south along the western border of North Kingwood Forest…
This corner and the portion of the ditch that extends straight down were expanded this week.
… the contractor widened the ditch and expanded the turn.
Dozens of homes flooded in North Kingwood Forest (left side of photo behind tree line) on May 7. This ditch had a tiny portion of current capacity at the time (see below). Photo courtesy of Jeff Miller.
For comparison, here is what the same ditch looked like on May 12.
Same ditch as above adjacent to North Kingwood Forest (on left) but on May 12.
To see what the entire turning radius NOW looks like, see this video.
Video courtesy of Jeff Miller.
More good and welcome improvements. Just wish they had been in place before May 7th.
Posted by Bob Rehak on 7/13/2019 with help from Jeff Miller.
683 Days after Hurricane Harvey and Two Months after the Elm Grove Flood
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/07/IMG_2433-1.jpg?fit=1200%2C900&ssl=19001200adminadmin2019-07-12 20:06:372019-07-12 20:06:46Rehab Work to Begin on Upstream Portion of Taylor Gully Monday, July 15
It wasn’t supposed to happen. But it did. After receiving two letters and two visits telling Elaine Phillips that the City could do nothing to fix her drainage, trucks magically showed up this morning … and fixed it. They gave her no explanation.
Epic Battle over Partially Blocked Drainage Swale
You may remember me posting about Elaine Phillips on June 21. Elaine was battling cancer, contractors, and the City of Houston bureaucracy all by herself. Her home had just flooded for the fifth time since 1997 and her husband was working in New York. The swale in front of her home had never been regraded and was partially clogged with sediment.
Surprise Turn of Events
“We had been told, as recently as Wednesday, 7/10, that nothing would be done in the near future, despite the unrelenting efforts of both Dave Martin’s office and Dan Crenshaw’s office,” said Elaine. “Then I woke up to four city trucks and a back hoe Thursday morning. They regraded the ditches from my house to the corner and Cindy’s house to the corner. Don’t know how, who, or why it’s happening, but I’m not going to look a gift-horse in the mouth. It’s Christmas in July! Many thanks to Kaaren Cambio from Dan Crenshaw’s office and Dave Martin’s office as well!”
Elaine Phillips newly graded ditch should help ensure positive drainage in future storms and move water away from her house faster.
Altogether, Phillips estimates that various city, county, and congressional representatives worked dozens of hours trying to help her for a job that ultimately took about five hours from start to finish.
Other Possibilities Still Remain
Phillips has also explored elevating her house and buyouts. Both remain possibilities thanks to their extra efforts on her behalf.
In the meantime, Phillips is giddy with glee. Until today, progress had remained elusive for 22 years.
For good measure, and in the spirit of Christmas, while the City of Houston crew was out helping Phillips today, they also deepened the ditches in four more homes near the same intersection.
A hearty thanks to the City from the Kings Forest Board and residents.
Posted by Bob Rehak on July 12, 2019
682 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2019/07/IMG_3535.jpg?fit=1500%2C2000&ssl=120001500adminadmin2019-07-12 17:14:512019-07-12 18:33:34Christmas in July for Elaine Phillips
Weekly Mouth Bar Dredging Update with Images from Carolyn Daniel, Kendall Taft, Franz Willette of BCAeronautics, and the Army Corps
We learned a little bit more this week about the next phase of dredging. Several graphics (below) released by the Corps summarize modifications to the Emergency West Fork Debris Removal Project.
What We Confirmed and Learned
We confirmed that:
We learned that:
Corps Releases Summary of Project and Extension(s)
I compiled the information above from a PDF developed by The Army Corps. They released it on July 9.
To calculate the depth of dredging in that blue area to the right, I simulated the outline in Google Earth and found that it roughly equals 500,000 square yards. That means if they dredge this whole area, they will reduce the river bed by approximately 3 feet. The area already averages 2-3 feet deep. That means the river will be roughly 6 feet deep through this reach when the Corps finishes its portion of the job.
However, upstream, Callan is dredging to a depth of 22.5 feet. Thus, creating a continuous gradient along the river bottom would require dredging approximately another 16 feet deeper in the same area…and that wouldn’t even get you to the FM1960 bridge. Also, note the gap in the graphic between where Callan will finish its portion of Phase One and Great Lakes will start mouth bar dredging.
Unknowns
It is unclear at this point who will dredge the rest of the material that needs to be removed to restore conveyance of the West Fork. Neither the City, County, nor State have yet announced their plans. We don’t know:
In the meantime, here are two dramatic sequences of photos plus a video submitted by readers this week. They show what the start of mouth bar dredging looked like from the air and water.
Carolyn Daniel Mouth Bar Shots from Airplane Landing at IAH
Carolyn Daniel submitted these shots of the mouth bar and dredging activity taken from her airplane window while on a landing approach to Bush Intercontinental Airport.
Franz Willett Drone Shots Courtesy of BCAeronautics
Franz Willette runs a company called BCAeronautics that uses drones in mapping, inspections, roofing analyses, site surveys, and 3D modeling. He did not have clouds to contend with and could shoot safely from a much lower elevation. Willette is FAA certified.
Kendall Taft Video
Shows how shallow the water is and how vast the expanse is.
I hope to post updates weekly on this project. So readers, please help. Submit your images through the submissions page of this web site. My thanks to Carolyn Daniel, Franz Willette, BCAeronautics and Kendall Taft.
Posted by Bob Rehak on 7/13/2019 with help from Carolyn Daniel, Franz Willette, BCAeronautics and Kendall Taft.
683 Days since Hurricane Harvey
Rehab Work to Begin on Upstream Portion of Taylor Gully Monday, July 15
According to Beth Walters of the Harris County Flood Control District (HCFCD), work on the upstream portion of Taylor Gully in Kingwood will begin on Monday, July 15, weather permitting. There’s still uncertainty regarding the local impact of Tropical Storm Barry, however, equipment has already started showing up at the job site.
From Bassingham to Harris County Line
The work will extend from Bassingham to the Harris County line where the Gully meets the new Woodridge Village development in Montgomery County.
Scope of Work
This work will include the following:
Next Steps
After completing this reach of the channel, HCFCD staff will investigate Taylor Gully further downstream, where HCFCD completed a desilt job in the spring of 2019, from Bassingham to the downstream end. HCFCD will open up any constrictions and desilt the channel if necessary.
Vital for Flood Mitigation
Approximately 200 homes near this channel flooded during the May 7th storm. According to residents, video taken during the storm, and still photos taken after the storm, overland sheet flow from Woodridge Village was the likely cause of their problems. Regardless, news of this effort will come as a great relief to Elm Grove and Woodstream residents who welcome every extra margin of safety they can get.
Kudos to the flood control district for jumping on this project. Commissioners Court approved the right of way acquisition only last Tuesday!
Work on Montgomery County Portion of Gully Also Proceeding
Elm Grove resident Jeff Miller also reported today that Woodridge has expanded a portion of Taylor Gully that runs through Montgomery County. Where the east/west portion of the ditch makes a 120 degree turn and starts heading south along the western border of North Kingwood Forest…
… the contractor widened the ditch and expanded the turn.
For comparison, here is what the same ditch looked like on May 12.
To see what the entire turning radius NOW looks like, see this video.
More good and welcome improvements. Just wish they had been in place before May 7th.
Posted by Bob Rehak on 7/13/2019 with help from Jeff Miller.
683 Days after Hurricane Harvey and Two Months after the Elm Grove Flood
Christmas in July for Elaine Phillips
It wasn’t supposed to happen. But it did. After receiving two letters and two visits telling Elaine Phillips that the City could do nothing to fix her drainage, trucks magically showed up this morning … and fixed it. They gave her no explanation.
Epic Battle over Partially Blocked Drainage Swale
You may remember me posting about Elaine Phillips on June 21. Elaine was battling cancer, contractors, and the City of Houston bureaucracy all by herself. Her home had just flooded for the fifth time since 1997 and her husband was working in New York. The swale in front of her home had never been regraded and was partially clogged with sediment.
Surprise Turn of Events
“We had been told, as recently as Wednesday, 7/10, that nothing would be done in the near future, despite the unrelenting efforts of both Dave Martin’s office and Dan Crenshaw’s office,” said Elaine. “Then I woke up to four city trucks and a back hoe Thursday morning. They regraded the ditches from my house to the corner and Cindy’s house to the corner. Don’t know how, who, or why it’s happening, but I’m not going to look a gift-horse in the mouth. It’s Christmas in July! Many thanks to Kaaren Cambio from Dan Crenshaw’s office and Dave Martin’s office as well!”
Altogether, Phillips estimates that various city, county, and congressional representatives worked dozens of hours trying to help her for a job that ultimately took about five hours from start to finish.
Other Possibilities Still Remain
Phillips has also explored elevating her house and buyouts. Both remain possibilities thanks to their extra efforts on her behalf.
In the meantime, Phillips is giddy with glee. Until today, progress had remained elusive for 22 years.
For good measure, and in the spirit of Christmas, while the City of Houston crew was out helping Phillips today, they also deepened the ditches in four more homes near the same intersection.
A hearty thanks to the City from the Kings Forest Board and residents.
Posted by Bob Rehak on July 12, 2019
682 Days since Hurricane Harvey