Tag Archive for: silt fence

Bayou Land Conservancy Volunteers Protect Nature’s Flood Protection

12/7/24 – One of the leading environmental groups in the Houston region is the Bayou Land Conservancy (BLC). Their motto: “We preserve land along streams for flood control, clean water, and wildlife.”

Last year, BLC volunteers logged thousands of hours maintaining and improving natural areas and trails that help others appreciate nature’s wonders.

One such volunteer is Jeff Hodges. He helped restore land along Spring Creek in BLC’s Arrowwood Preserve, which is being used for environmental education. His story is a testament to the tenacity of BLC volunteers in their service of nature. Below are excepts from Hodges’ responses to my questions.

Preserve’s Contribution to Flood Reduction

Rehak: How does the Bayou Land Conservancy help reduce flooding?

Hodges: Development in the Houston area will continue. We need to understand how this can lead to increased flood risk of flooding if not managed correctly.

BLC is a land trust. It protects lands where rain water is absorbed and held as flood waters, slowing down the release of water into creeks, streams and rivers. That helps reduce or eliminate flooding downstream.

These lands are increasingly important. They let water soak into the land providing much needed water, to the water table and aquifers.

Currently, ever major aquifer in the U.S. is being depleted, except in the Pacific Northwest. This depletion contributes to subsidence, which increases flood risk. Areas in the Woodlands have lost two feet of elevation from subsidence.

The lands that BLC protects also provide habitat for wildlife and give people a chance to enjoy nature.

Rehak: Specifically, how does Arrowwood reduce flooding along Spring Creek.

Hodges: Arrowwood is a natural flood plain. It slows and stores rainwater flowing toward Spring Creek. A large portion of the preserve floods in heavy rains. It gives stormwater someplace to sit and wait instead of moving quickly downstream and flooding other areas already developed.

Restoring the Natural Environment

Rehak: I hear that in trying to make Arrowwood more user friendly, you and your fellow volunteers removed more than a mile of silt fence. How did it get there?

Hodges: A sand-and-gravel company installed the silt fence when it applied for a permit to turn the property into a quarry. But neighbors blocked approval of the permit. The mining company, after a number of years, donated the land to Bayou Land Conservancy.

Rehak: Removing that silt fence must have been a chore!

Hodges: We actually made a short movie about it. The preserve comprises 117 acres and the fence surrounded 22 acres. As work began to make the preserve accessible, we realized that we did not have the correct equipment to remove the silt fence.

Bayou Land Conservancy Volunteer Jeff Hodges led the Arrowwood Silt Fence Removal Project

We originally estimated the preserve had 2 miles of silt fencing containing approximately 700 posts, each weighing 5 pounds.

Jeff Hodges

The task seemed overwhelming. But we were very concerned about the impact of the fence on wildlife. Turtles and other small wildlife couldn’t get over or around it.

Volunteers Discover Task is Herculean

Rehak: What kind of problems did you encounter?

Hodges: I started to wonder if we could remove the silt fence manually. Bayou Land Conservancy gave me and a small team permission to work on it. The first day, two of us tried to develop a process to remove the silt fencing. In a half day, we could only remove about 10 posts and 50 feet of fencing.

Most of the posts had to be dug out by hand. Each was four feet and originally pounded into the ground to a depth of two feet. But over time, silt built up around the fence. Many sections were totally buried.

The silt fencing has three components: posts, heavy metal fencing, and a plastic tarp. The combination prevents silt, sand and rocks from washing into the creek.

After the first day, most people would have been discouraged. But our volunteers proved it could be done. It was just going to take a lot of time and effort.

Volunteers decided to separate the fence and post removal operations to speed things up.

We decided we would remove the metal fence along with the black tarp first. We left the posts until we were able to develop a better way to remove them.

But the removal of the fencing was not without problems. Portions of the fencing were buried, so we had to dig them out. Worse, the fencing had become overgrown. Before we could remove it, we first had to remove fallen trees, and cut away vines and brambles.

Triumph of Ingenuity, Sweat and Safety Goggles

Rehak: Did you ever develop a faster system?

Hodges: As we removed fencing over the next couple of months, we worked on developing a technique to remove posts without digging. Eventually, we developed a technique that sped up the operation. We hit the posts with a sledge hammer on all four sides to loosen them. Then we hooked up a farm jack to pry them out of the ground.

Working as a team, we could remove about 15 posts per hour. Some, buried to the top in heavy clay, still had to be dug out by hand. Those just took longer.

Everyone working on this project had to wear long pants, long sleeves, safety glasses, and heavy-duty work gloves. We also had to be up to date on our tetanus shots, too for obvious reasons.

Rehak: What did the final boxscore say?

Hodges: All in all, the team ended up removing 499 posts and more than 1.5 miles of fencing. While working on the fencing, we also removed trash and litter which seemed to be everywhere. Fencing and trash filled two industrial dumpsters.

Some of the trash and fencing materials removed from the BLC Arrowwood Preserve.

It was grueling work. But the transformation of the land is overwhelming. And very satisfying. The beauty of what this preserve will become is now evident. 

Postscript: Jill Boullion, Bayou Land Conservancy Executive Director, said, ““Jeff was awarded our Trailblazer Award for 2024 because of his leadership on this project. It’s an important part of our restoration plan for Arrowwood that will make the preserve even more ecologically valuable for the community. We appreciate volunteers like Jeff and the crew that did this very difficult project.”

Posted by Bob Rehak and Jeff Hodges on 12/7/24

2657 Days since Hurricane Harvey

WLHP Developer Still Flooding Neighborhood

Overnight, the gauge at West Lake Houston Parkway (WLHP) and the West Fork received 1.44 inches of rain. And once again, runoff from Trammell Crow’s High Street Residential apartment complex on WLHP flooded surrounding streets and neighbors.

Visit from Engineering, Pollution Control and Constables

Harris County Engineering made a series of visits to the work site earlier this week in an effort to bring the developer into compliance with stormwater regulations. Harris County Constables and Harris County Pollution Control even accompanied the engineering staff to the site on 2/1/24.

After that visit, a member of the engineering staff told a neighbor that work at the site had been shut down until contractors came into compliance. Reportedly, mitigation work was the only work allowed on the site. But evidently, the developer had other priorities.

Sediment-laden runoff from construction sites is one of the main sources of sediment pollution in rivers and lakes. It has been linked to blockages that contribute to flooding.

Changes Between 2/1/24 and 2/2/24

On Friday, 2/2/24, I paid the site the Trammell Crow construction site a visit and saw some stormwater-mitigation work in progress. Specifically, contractors appeared to have:

  • Dug a small pond to let sediment settle out of water.
  • Dug a channel toward it.
  • Cleared muck off the sidewalk on Kings Park Way.
  • Placed a short length of wattle roll between the street and worksite along Kings Park Way. (Wattle is a temporary erosion control and sediment control device used on construction sites to protect water quality in nearby streams, rivers, lakes. During rain storms, the rolls intercept surface stormwater runoff and reduce the velocity of flow.) 
  • Placed wattle in front of one of the two storm drains on Kings Park Way along the southeast side of the development.
  • Erected a six-foot-high privacy fence around three sides of the site.
  • Stationed a guard at the worksite entrance. They clearly didn’t want anyone documenting what they were or weren’t doing.

Had they spent as much time erecting a runoff barrier as they did the visual barrier, they might have prevented another stormwater debacle.

Other work unrelated to stormwater mitigation also appeared to be underway at the site Friday afternoon.

Still No Results

By 8 am Saturday morning (2/3/24), my phone was blowing up. Irate neighbors were sending me videos. Once again, Kings Park Way and West Lake Houston Parkway were being flooded.

Screen capture from video sent by reader 8:43am 2/3/24. For full video, click here or on image.

By 10:30 am, the same intersection looked like this.

Someone had removed the wattle and a sand bag to let the street drain. Note the new privacy fence in background.

That’s one way to solve a street-flooding problem. Flush the silty muck down the storm drain.

At noon, here’s what you could see elsewhere with a drone.

Looking toward the same troubled corner from the other side of the fence. Note water seeping underneath.
Elsewhere, they had begun digging a trench to channel water toward the sediment pond.
But the trench from the troubling corner did not reach the sediment pond.

Unprotected Perimeter Remained

Beyond the main entry, no silt fence and water leaking under privacy fence, which was leaning over.
At the back of the property, no fence at all and water flowing into neighboring property.
Water was escaping all along the back of the property.

Perhaps the developer should have spent more time controlling stormwater and less time concealing the site with a half mile of privacy fence.

It makes me wonder whether their values are misplaced.

Posted by Bob Rehak on 2/3/24

2349 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.

RV Resort Pumping Stormwater Into Edgewater Park, Bringing in Fill

Lakewood Cove residents reported yesterday and today that contractors at the Laurel Springs RV Resort are pumping stormwater from their detention pond into Precinct 4’s Edgewater Park. The reports are true. And it’s a permit violation.

I also found contractors bringing in fill from the outside that I thought was going to be “cut” from the detention pond. All photos below were taken on 1/18/22.

Pumping From Pond onto Neighboring Property

The approved permit plans clearly state that “Stormwater runoff shall not cross property lines.”

Stamp on many pages of approved Laurel Springs RV Resort plans.

I guess at some point the water in the pond ceased being runoff. Now it’s just a nuisance. The plans said pond water would be pumped into the City storm sewers. Hmmmm.

Photographed from Laurel Springs Lane looking west.
Here’s an aerial photo looking toward Laurel Springs Lane.
Check out all the muck being washed into the woods. Those woods belong to Harris County Pct. 4. That’s part of new Edgewater Park.

Note the lack of silt fences in the two photos above. Plans clearly state that silt fences will be installed to keep silt from escaping the property. Double Hmmmm!

Bringing in Fill instead of Moving It From Within the Site

As I photographed the pumping, I noticed a parade of dump trucks bringing in fill, dumping it, and leaving as a bulldozer spread it out and another machine quickly compacted it.

Looking NW toward Lowes in top center. Note dump truck depositing fill – one of many that I watched.
The area where they deposited fill just north of the pond corresponds to the plans. See below.
Detail from mitigation plan showing NW corner of pond and fill area. For full plan, click here.

From text on the image above, I assumed that the job was to be a routine “cut and fill” operation. Maybe I shouldn’t have assumed.

Cut and Fill is an industry standard in floodplains. It means you move dirt from one part of the site to another. So, there is no additional fill brought into the floodplain. The fill area above appears to be in the .2% annual chance floodplain, according to the old FEMA map below. However, the developer did not mark the .2% chance floodplain on plans.

FEMA floodplain map. Aqua = 1% annual chance. Brown = .2% annual chance. It appears the northern part of the detention pond (not shown on this old satellite image) cuts between the aqua and brown areas.

For the record, Chapter 19 of Houston’s Code of Ordinances currently does not prohibit bringing fill into the .2% annual chance floodplain. See Section 19.34.

Posted by Bob Rehak on 1/18/2022

1603 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.

TCEQ Blasts Colony Ridge, Says Construction Practices Could Adversely Affect Human Health

A seven-month-long TCEQ investigation of Colony Ridge construction practices resulted in a 184-page report that confirmed allegations of erosion and silt flowing uncontrolled into ditches and streams. The investigation resulted in a “notice of enforcement.”

TCEQ Alleges Permit Violations Affecting Human Health

TCEQ found the Colony Ridge developer in violation of its Construction General Permit for failure to install even minimum controls such as silt fences and vegetative buffer strips.

As a result, the report says the developer failed to prevent discharges that “contribute to a violation of water quality standards” and that have “a reasonable likelihood of adversely affecting human health or the environment.”

Investigators found unstabilized and unprotected drainage channels connecting 3,678.69 acres of disturbed land to unprotected streams and creeks. Sediment now almost completely fills some of those streams. They lead to Luce Bayou and and the East Fork San Jacinto River, which empty into Lake Houston, the source of drinking water for 2 million people.

Lack of Construction Best Management Practices

Colony Ridge’s Construction General Permit does not authorize discharges into Texas surface waters. Yet investigators found:

  • Drainage ditches with unstabilized soil on their sides
  • A drainage ditch with completely destabilized sides
  • Sediment deposition in multiple creeks
  • One creek channel almost completely filled by sediment
  • Culverts blocked with sediment
  • A washed out road
  • Water samples with elevated levels of dissolved and suspended solids as high as 1370 milligrams/liter (suspended) and 6360 (solid)…
  • ...All tied to inadequate or non-existent best management practices

See photos below.

Self-Reports in Stark Contrast to TCEQ Report

In contrast, the construction superintendent’s own inspection checklists (pages 51-78) rated virtually all erosion-prevention measures that the company did employ as “acceptable.” However, he also indicated that the company did not use most common protective measures, such as vegetation, sod, silt fences and detention basins; claiming they were “not applicable.” His report on 2/19/20 contained a note indicating the construction site “Looks good.” His last weekly report before the complaint that triggered the investigation found no “action items.”

Get the Picture

Pages 139 to 159 of the report (Attachment 13) and pages 167-171 (attachment 17) show photographs of almost five dozen violations that contradict the construction manager’s reports.

Below is a sampling of ten photos from the report. The TCEQ investigator took them all on 6/16/2020. He also provided the captions. Page numbers refer to the full TCEQ report.

Downstream view of Rocky Branch Creek. Washed out road in background. Photo 2 out of 57. Page 141.
Destabilized banks along Long Branch Creek and sediment deposition in creek channel. Note: the creek channel almost completely filled in by sediment. Photo 17 of 57. Page 146.
Unstabilized drainage channels in Section 7 that are tied into Long Branch Creek. Photo 20 of 57. Page 147.
Area surrounding Long Branch Creek destabilized with no BMPs installed around the creek. Note unstabilized sediment piles next to the creek. Photo 30 of 57, Page 151.
Area surrounding Long Branch Creek destabilized with no BMPs installed around the creek. Note unstabilized sediment piles next to the creek. Photo 32 of 57, Page 151.
Sediment and debris in cement culvert that allows Long Branch Creek to flow underneath Section 5 entrance road. Photo 40 of 57. Page 154.
Sediment and debris in cement culvert that allows Long Branch Creek to flow underneath Section 5 entrance road. Photo 41 of 57. Page 154.
Inadequate BMPs in drainage ditch that leads to Long Branch Creek. Note: Undercut silt fence. Photo 44 of 57, page 155.
Sediment deposition in unnamed creek channel right before Long Branch Creek. Note sediment line on cree. Sediment line is demarcated by pocket knife in red circle. Photo 48 of 57. Page 156.
Sediment in a drainage ditch that is tied into an unnamed creek. Note over-capacitated silt fence. Photo 53 of 57. Page 158.

Personal Observations Corroborate Report

Based on personal observations, I don’t think the investigator exaggerated. On the contrary, he may not have captured the full scope the hazards. Some can only be seen from the air. As luck would have it, I flew a helicopter over Colony Ridge on the same day the investigator captured his photos. Here are two from the air and one from the ground.

Washed out ditches abounded.
The developer was clearing more land before previously developed areas could be stabilized.
Silt fence being propped up to allow raw sewage to flow underneath it into Luce Bayou, which empties into Lake Houston.

Other Strangeness

Colony Ridge hired Merit Professional Services in Flower Mound, a Dallas/Fort Worth suburb. Merit obtains stormwater pollution prevention permits and also provides stormwater inspection services. However, according to the complainant in this case, Merit claimed they only provided the permit, but not inspection services. Lack of local oversight may have been a large part of the problem.

Page 182 of the TCEQ report contains an August 12, 2020, memo from Landplan Engineering to the investigator. It states that, “Going forward, Colony has switched to Double Oak since they are headquartered in the Houston Area.” Double Oak provides the same services and then some. Their website shows they offer construction, erosion control and stormwater management.

Ironically, Double Oak Construction is a defendant in the Elm Grove lawsuits against Perry Homes and its contractors on the Woodridge Village project in Montgomery County. That case involves many of the same issues involved in both the TCEQ report and the City of Plum Grove’s lawsuit against the developer of Colony Ridge. The report does not mention exactly when Double Oak started working for Colony Ridge.

For the full TCEQ report, click here. Caution: large download, 28 megs, 184 pages.

Posted by Bob Rehak on 10/16/2020

1144 Days after Hurricane Harvey and 393 After Imelda

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.