Sheetflow Erosion Control Erosion Control for CESCL's

September 17, 2020

Compost Sock Catch Basin Berm

Photo: David Jenkins

This compost sock catch basin berm works well as it is heavy enough to stick to the asphalt. Note the tear and I would keep an eye on it during inspections.

September 7, 2020

Trash Bag Catch Basin Cover

Photo: David Jenkins

In an emergency, a heavy duty trash bag can provide catch basin protection until a more permanent BMP is installed.

September 2, 2020

Why is There Foam Around the Catch Basin?

Photo: David Jenkins

Why is there foam around the catch basin? I will give the answer tomorrow.

July 31, 2020

Catch Basin Covered-Infiltration

catch basin covered to allow infiltration of construction stormwater in hole cut in asphalt and filled with rock
Photo: David Jenkins

This is the first project we have cut asphalt to allow construction stormwater to infiltrate. The area is paved, flat. The sweeper runs constantly but the water is still too turbid to go down the drain. The fill soil under the asphalt is sandy. If we just covered the catch basin with 30 Mil PVC, the area would just flood, then drain to another catch basin. Solution? Cut out a section of asphalt full depth to the sandy soil, fill with 3 to 5 inch rock. This way the water infiltrates but vehicles can drive over the hole. This is working really well so we will be doing this on future container dock upgrade projects.

June 30, 2020

Sand Bag Berm Around Catch Basin

Photo: David Jenkins

You can’t get a good seal with a sand bag berm. Dirty water down the drain.

May 19, 2020

I Know There’s a Catch Basin in There Somewhere

Photo: David Jenkins

I know there’s a catch basin in there somewhere. Can you identify all of the materials? I think there are five or six types.

October 30, 2019

Open Catch Basin Fixed Again

photo: David Jenkins

As of two days ago, the open catch basin is fixed again; there is new 30 mil PVC under the catch basin grate and turbid water is not draining into the catch basin. The contractor told their staff not to puncture the PVC. No word on whether they are thinking more proactively about this. The best measure is to keep the stockpile covered and the area cleaned up. We shall see what’s next.

October 29, 2019

Open Catch Basin Open Again

Photo: David Jenkins

The saga continues… the next inspection looked like the first inspection. The open catch basin is open again. 500 + NTU water draining into the catch basin. What happened?

Photo: David Jenkins

As suspected, someone didn’t like the flooding, so they punctured the 30 mil PVC. I am wondering why the contractor erosion control lead is not finding this.

October 28, 2019

Open Catch Basin Fixed?

Photo: David Jenkins

I inspected the open catch basin the next day to see if it was fixed, and this is what the contractor had done to keep turbid water out. I have nothing against doing this, but, since this does keep water out, flooding ensues. Flooding is okay if the catch basin is in a low spot and no one needs to work in the area.

I told the contractor that they might want to look at the storm system and see if there is a point where they can install a concrete plug temporarily and use the system for conveying the turbid water to their treatment system.

October 27, 2019

Open Catch Basin

Photo: David Jenkins

I found this open catch basin during a construction erosion inspection. The turbidity of the water draining into it from the stockpile measured at over 600 NTUs. Note that there is an insert in the catch basin; these do nothing to reduce turbidity. I notified the contractor who should have found this in their daily inspections, which I pointed out to them.

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