Sheetflow Erosion and Sediment Control

July 13, 2020

Kiddy Pools for Secondary Containment

P:hoto: David Jenkins

Always a good idea to have kiddie pools on hand for all of your secondary containment needs.

July 10, 2020

BMP Graveyard-Straw Wattle

Photo: David Jenkins

Where did the straw go? Ten years and the plastic mesh feels just as strong as the day it was installed.

July 9, 2020

Guide to Handling Fugitive Dust from Construction Projects

Download: Guide to Handling Fugitive Dust from Construction Projects.PDF

The classic brochure developed in 1997 by the Associated General Contractors (AGC) of Washington Education Foundation and the Fugitive Dust Task Force, Seattle, Washington. Updated and edited for the Internet by: www.sheetflow.com, February 2009.

July 8, 2020

BMP Graveyard-Silt Fence

Photo: David Jenkins

10 year old silt fence-does this stuff ever go away?

July 7, 2020

Sed Cage

Photo: David Jenkins

Sed Cage is a catch basin protection best management practice that seems to work well at ponding water, which allows sediment to settle out. It provides some filtration but does plug up, then becoming a barrier. I have only seen it used in this application on a Superfund cleanup site. I imaging that it can be reused if taken care of and cleaned after use. I might even use this over a catch basin insert in some applications.

July 6, 2020

Perimeter Controls, Pump and Sump

Photo: David Jenkins

Using the asphalt berm and silt fence as the project perimeter-left is project, right is not- note that all sediment and water are contained within the project. Turbid water and sediment are directed to a sump and pump to be conveyed to an onsite stormwater treatment system (chitosan-enhanced sand filtration) before discharge to a local creek. There is no need to cover bare soil since the project is contained within the perimeter best management practices. Also, no vehicles can exit here so there is no possibility of sediment being tracked onto the highway.

July 3, 2020

BMP Graveyard-Sand Bags

Photo: David Jenkins

Ten year old sand bags; like we need even more micro-plastic laying around.

July 2, 2020

Placing Amendment 16 Center Runway

Video: David Jenkins

The compost soil amendment was recycled yard waste. It was placed, tilled 8 to 12 inches into the existing soil, then trackwalked. Bonded fiber matrix was applied with seed and fertilizer. It was placed at the end of summer so we watered it with a water truck fitted with an adjustable fire nozzle.

July 1, 2020

Debris Stockpile

Photo: David Jenkins

I like how the contractor built a contained area to temporarily stockpile removed asphalt and other construction debris. They used jersey barriers with cold mix asphalt along the base to contain the debris and rainwater.

June 30, 2020

Sand Bag Berm Around Catch Basin

Photo: David Jenkins

The down side to using sandbags is that you can’t get a good seal and they leak. The idea behind this is that water ponds and some of the sediment settles out. With the leakage, little settling can occur. The catch basin insert will catch some of the sediment but since we are regulated on turbidity in Washington, neither BMP cuts turbidity low enough to meet the compliance standard. Our contract specifications require that discharges not exceed 25 Nephelometric Turbidity Units (NTUs).

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