Sheetflow Erosion & Sediment Control Heavy Civil Construction

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).

June 29, 2020

BMP Graveyard-Geotextile

photo: David Jenkins

Ten year old geotextile fabric left in the environment, more micro-plastic.

June 26, 2020

Native Plant Pollinator Meadow-Part 2

In March, I posted a photo of my newly seeded native plant pollinator meadow. These photos were taken this morning. Special thanks to Northwest Meadowscapes and the Kitsap Conservation District for the seeds, instructions and assistance.

Photo: David Jenkins
Photo: David Jenkins
Photo: David Jenkins
Photo: David Jenkins
Photo: David Jenkins

June 25, 2020

BMP Graveyard-Sandbags

photo: David Jenkins

Ten year old sand bags and micro-plastic left in the environment.

June 24, 2020

Silt Fence and Trackout Fail Part 2

This is a follow up to Silt Fence and Trackout Fail post from April 6, 2020. Same old !@#$, different month.

Photo: David Jenkins
Photo: David Jenkins

June 23, 2020

Western Region Climate Center-WRCC

This is just one of many things you can find at the Western Region Climate Center website. I use this graph all of the time to show people the best time to do earthwork. It looks great in a SWPPP. These are available for hundreds of weather stations throughout the western United States.

June 22, 2020

BMP Graveyard-Coir Blanket

Photo: David Jenkins

Heavy duty coir coconut mesh blanket left in the sun for five years. It is still functioning as soil cover but has no strength left and is easy to pull apart.

June 19, 2020

TESC Plan Review

When your BlueBeam Revu hasn’t been upgraded and you need to finalize the TESC plan for the upcoming project, you do it the old school way- with colored pencils.

June 18, 2020

Rock Construction Entrance

Photo: David Jenkins
Photo: David Jenkins

Rock construction entrance to the Groco stockpile. It is properly installed over geotextile fabric and is 100 feet long. Even so, there is obviously material on the tires the full length, onto a gravel section then onto concrete road surface, then another 250 feet. Nothing got onto the public road and all was swept up.

Still, the best way to deal with trackout is to find ways to keep tires clean. If the delivery trucks had stayed on the rock to dump, and if the loader had moved the compost from where the truck dumped, there would be no trackout.

June 17, 2020

Silt Fence Overlap

Photo: David Jenkins
Photo: David Jenkins

This silt fence surrounds a compost (Groco) stockpile, most of which will be used over the next several months. I don’t expect any runoff; this is a very low risk situation. Being low risk, i am okay with how the fence ends were joined. The orange fence ends overlap about 3 or 4 feet. The black is placed at the overlap seam, with about 3 or 4 feet of black fence on either side of the seam. The fence flaps are trenched in and covered with soil.

If this were a high risk situation, I would have required the contractor to use one continuous orange fence with no seams. Another option is to wrap the fence ends several times around a post and drive the post in. this effectively makes the fence one continuous installation.

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