December 29, 2020
Taxiway Bravo Closed as Jets Bypass
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December 28, 2020
Taxiway Lima Drive by Erosion Inspection
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December 25, 2020
Clean Water Diversion with Water Filled Berms
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December 24, 2020
December 23, 2020
Beautiful Staging Area
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December 22, 2020
Shameful Secondary Containment
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December 21, 2020
Root Wads and Cross Logs
We finished installing the root wads and cross logs, the toe and edge logs. All that’s left is the landscaping and planting this winter. When I took this photo last Thursday, the tide was just over +12.
By excavating 1200 feet of Duwamish Waterway shoreline, creating intertidal habitat between +8 and +12 elevations, and installing native plants, we are adding valuable salmon habitat.
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December 17, 2020
I-66 Highway Erosion
On this I-66 highway project, the main cause of the slope erosion and rills is clean runoff from the highway. I assume there were curbs along the road edge that at some point were removed. I would restore permanent or temporary curbs to direct clean water to catch basins.
I might leave the slopes uncovered. This would depend on what phase of construction this project is in. If it is in shutdown, I would cover with plastic ( I hate using plastic because it ends up in the landfill), or some type of erosion blanket. I might even consider spraying the slope with polyacrylamide and not covering it.
I do like how the area at the base of the slope is lower than the road to the left so it acts like a sediment pond. Rather than pump to a geotextile bag, I would set up a chitosan-enhanced sand filtration (CESF) treatment system, treat and discharge clean water to the catch basin. Or, if the state environmental agency allows, I would use a gel-floc passive treatment system instead.
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December 16, 2020
Deep Cell Cleanup
This cleanup contractor is pumping contaminated water out of this deep cell prior to backfilling it with clean soil. This project is a Superfund site.
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