Sheet Flow Construction Erosion Control

October 15, 2020

Sediment Trackout Happens

Sediment trackout happens when you back trucks off of the steel plates onto dirt to unload materials. The plan was for trucks to stay on plates, back to the end and dump.

The excavator was to move the materials around the site. There is no tire wash on this project as there isn’t room, so staying on the plates is required and necessary. The trackout is onto the neighbors parking lot, our only site access, and they don’t appreciate dirt ending up in their stormwater swale when the rains come.

Video: David Jenkins-Sheetflow Erosion Control

October 14, 2020

Pink Eco Pans

Photo: David Jenkins

I took this photo of a construction site across from the Frye Art Museum in Seattle. I liked the colors and all of the stacked pink eco pans.

October 13, 2020

Plastic Covered Slope

Here is a nice, plastic covered slope. They have placed sand bags on the seams, the seams are overlapped at least 12 inches and the plastic is run all the way to the bottom of the slope. This is a riverbank habitat restoration project on the Duwamish Waterway.

Video: David Jenkins

October 2, 2020

Excellent Tire Wash

Photo: Troy Modie-Port of Seattle

This here is an excellent tire wash. Why? Because it is long enough for two tire rotations. In addition, quarry spalls are installed at the entrance and exit of the tire wash. To the left of the tire wash, the contractor placed quarry spalls so vehicles entering the project don’t have to drive through the tire wash.

October 1, 2020

Leaky Containment

Leaky Containment Photo: David Jenkins

I wondered why, after several days of rain, this containment had so little water in it. It’s because there are small holes in the bottom and it’s a leaky containment. I hope the generator doesn’t spring a leak.

September 30, 2020

Slope Covered with Plastic

View of slope on Site 25 Habitat Restoration Project. Photo: David jenkins

We have covered a slope above the Duwamish Waterway with plastic until landscaping occurs in December. The contractor has done a great job overlapping the plastic sheets and securing them with sand bags.

September 29, 2020

Sod Berm Perimeter BMP

Photo: David Jenkins

This is not one of my projects but we have used this method on occasion. Why install silt fence when you can create a sod berm perimeter BMP?

In this case, the area is small and it is surrounded by vegetation so the risk of erosion and turbid runoff is low. In addition, the sod is full roots and seeds so it will regrow in place, providing additional erosion prevention.

September 25, 2020

Gravel Berm

Photo: David Jenkins

When we rebuilt this road, we had the contractor blade the gravel base course into a berm along the edge. This created a berm to project the bare area on the left from erosion caused by runoff from the roadway.

The gravel berm was bladed smooth just before installing a curb along the edge of the road. The bare soil was hydroseeded with bonded fiber matrix.

By using the gravel in this way, we avoided installing silt fence, preventing the soil disturbance that causes and keeping a bunch of plastic out of the landfill at the end of the project.

September 24, 2020

Biodegradable Erosion Control BMPs: Burlap Fence Compost Sock

Video: David Jenkins

Biodegradable Erosion Control BMPs: Burlap Fence Compost Sock

My goal was 100% biodegradable BMPs on this habitat restoration project. In this video I show the burlap silt fence and the compost socks.

September 21, 2020

Steel Plate Construction Access

Video: David Jenkins

This is a steel plate construction access that we built across a live stormwater swale. We have installed compost socks along the edge to keep construction runoff out of the swale.

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