Sheetflow Erosion Control Erosion Control for the CESCL

October 27, 2020

Dusty Spalls

Video: David Jenkins-Sheetflow Erosion Control

Dusty Spalls-sounds like the name of a cowboy in an old “B” western film. These quarry spalls came with enough crushed rock dust to create a fugitive dust cloud when dropped into a “skip” box.

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.

September 9, 2020

Berm for Quarry Spalls

Quarry Spalls. Photo: David Jenkins

This would not have been my choice as a berm for quarry spalls; straw wattles are too light to use on asphalt and they allow water to flow under them. A compost sock, being heavy, would work better, though, they are prone to tearing. An asphalt berm might be best here.

October 6, 2019

Construction Entrance Fail

Photo: David Jenkins

This is a 30 + acre site with one access point, this one. If this was my project, I would have specified a tire wash with an asphalt exit to the street. The tire wash would have been long enough for two tire rotations, have high pressure, low volume nozzles located such that all tire surfaces were sprayed. This system would also have an on-board, treatment polymer injection system to keep the tire wash water relatively clean. I would have specified that the water be tested for turbidity daily, measured at 50 NTUs or less. Since the water is classified as “process water”, I would have required it to be tested for metals and other contaminants, then hauled to an appropriate disposal facility.

September 24, 2019

Fancy Rock Entrance

I saw this fancy rock entrance on the way to work and thought it was amusing on the surface. Really, though, I think they needed the elevation to access the upper part of the site. That’s a nice mini excavator.

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