Sheetflow Erosion Control Erosion Control for the CESCL

December 10, 2020

Infiltration Berm

I call these infiltration berms. They aren’t berms like the others in this presentation but they function the same way-they contain water, divert water, or both.

The first two photos show created berms and the last is a utility trench that has not been paved yet. The first two were installed to contain the dirty runoff from muddy shoreline rip rap that we had to remove to install piling.

The berm surrounds about two acres of paved surface. The asphalt was removed to expose the subgrade to allow runoff to infiltrate. These can be designed but we didn’t have time.

To do this correctly, you should figure out how much runoff you will have, how much storage volume to create (this determines how long and how wide the trench is) and the actual infiltration rate of the subgrade.

The last photo shows how you can use your site to your advantage.

Presentation: David Jenkins-Sheetflow Erosion Control
Presentation: David Jenkins-Sheetflow Erosion Control
Presentation: David Jenkins-Sheetflow Erosion Control

November 20, 2020

Bubbling Crude

Photo: David Jenkins-Sheetflow Erosion Control

This “bubbling crude” could be from an episode of ” The Beverly Hillbillies”, but it isn’t. This is oil from a leaking underground storage tank we found on a Superfund cleanup project.

November 19, 2020

A Rare Beast

Photo: David Jenkins-Sheetflow Erosion Control

Here is a rare beast: a vacuum sweeper with working spray nozzles and nothing dripping out of the back.

This has been such a problem that I included the following language in my erosion control specification:

1.) Vacuum sweepers shall have on-board water spray systems operating at all times.  

2.) Sweeper systems shall function per manufacturer specifications including, but not limited to, water spray systems, blowers, vacuum nozzles, hoses, debris hopper, hydraulics and electrical.

3.) At no time shall debris hopper seals leak debris and/or liquids

November 18, 2020

The Problem with Hosing Tires

Photo: David Jenkins-Sheetflow Erosion Control
Photo: David Jenkins-Sheetflow Erosion Control

What is the problem with hosing tires? Water-specifically “Process Water”. Water that is used in a process, like hosing tires, is classified as process water and must be dealt with as though it is contaminated; because it is, with oil, grease, and various metals. So, if you are going to hose tires, you must plan to collect and dispose of the water legally. Legal disposal means a special processor for treatment and discharge or sanitary sewer.

November 17, 2020

Silt Fence Here?

Photo: David Jenkins

Would I put silt fence here? I would not. The work involves installing an 8 inch ductile water line to a property up the hill. The connection to service is at the left orange cone. The other orange cones are located on the backfilled excavation. I would have specified a gravel berm, asphalt berm, burlap fence, orange construction fence, or a combination.

November 10, 2020

What’s Wrong with this Photo?

Photo: David Jenkins-Sheetflow Erosion Control

What’s wrong with this photo? On first glance, it looks like a peaceful pathway across a stormwater swale. In reality, it is two compost socks that need to be overlapped and one burlap silt fence that needs maintenance.

November 6, 2020

Blowin’ in the Wind

Filed under: Photo — Tags: , , , , , , — Sheetflow @ 4:04 am
Photo: David Jenkins-Sheetflow Erosion Control

Blowin’ in the wind is what happens to your plastic stockpile cover when you don’t use enough sand bags. The contractor has been pulling material from the pile daily and hasn’t been using enough sand bags on the overlapped seams.

November 5, 2020

Large Containment, Small Container

Filed under: Photo — Tags: , , , , — Sheetflow @ 4:03 am
Photo: David Jenkins-Sheetflow Erosion Control

Such a large containment for such a small container. Let’s see, one quart is 32 ounces. The containment needs to hold 110% of the largest container. So, the containment for a quart of oil needs to contain 32 plus 10%, or 3.2 ounces, which equals 35.2 ounces total containment. I think a small trash can would be big enough.

November 4, 2020

Silt Fence Inspection

Filed under: Photo — Tags: , , , , , , — Sheetflow @ 6:53 am
Photo: David Jenkins-Sheetflow Erosion Control

This silt fence looks pretty ugly and inspection shows it certainly needs maintenance; but does it? The silt fence made sense before we excavated several feet, now it doesn’t. There is a turbidity curtain in the river to the right and the contractor is careful to pull material back from the riverbank. I am going to let this go.

November 3, 2020

Excellent Boot Wash Station

Filed under: Photo — Tags: , , , , , — Sheetflow @ 2:33 am
Photo: David Jenkins-Sheetflow Erosion Control

This is an excellent example of a boot wash station that we used on a Superfund site seven years ago. We entered from the top right, cleaned the loose mud off of our boots. Next, we stepped into the center bin and cleaned everything off of the boots. Lastly, we stepped into the closest bin and rinsed off.

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