Sheetflow Erosion and Sediment Control

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.

June 16, 2020

BMP Graveyard-Straw Wattle

Photo: David Jenkins

Ten year old straw wattle. Straw is long gone, plastic mesh just as strong as ever.

June 15, 2020

Sawcutting Expansion Joints

Runway 16 R / 34 L Photo: David Jenkins

June 12, 2020

Embankment Fill Design

June 11, 2020

Phasing a Stockpile Project to Prevent Dirty Runoff From Draining to Wetlands

Phase 1-

(A) Install silt fences on perimeter and at base of future stockpile.

(B) Clear, grub, grade, construct drainage ditches and temporary stormwater pond including outlet structure and perforated pipe level spreader drains. Grade to drain water away from outer perimeter silt fence and toward ditch.

(C) Hydroseed and install blankets in ditch line.

(D) NOTE: Background stockpile, built later, used an early generation construction stormwater treatment system and discharged to creek instead of level spreaders into vegetation.

Phase 2-

(A) Place and compact fill material to approximately 20 feet of vertical elevation.

(B) Trackwalk and hydroseed slope.

Phase 3-

(A) Same as Phase 2.

(B) Same as Phase 2.

Phase 4-

(A) Place and compact fill material to approximately 20 feet of vertical elevation. Start base of slope 15 feet in from lower fill and grade to drain away from lower slope and to the stormwater pond.

(B) Trackwalk and hydroseed slope.

(C) No hydroseed on top of the pile as material is continually brought in as available.

June 10, 2020


Photo: David Jenkins From the Duwamish Waterway

June 9, 2020

Old Straw Wattle

photo: David Jenkins

I don’t know how old this straw wattle is but old enough to grow moss. The straw is well degraded but the plastic mesh is still too strong to pull apart.

June 8, 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:, February 2009.

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