January 7, 2021
Site 25 Construction Erosion Inspection Part 4
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January 6, 2021
Site 25 Construction Erosion Inspection Part 3
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January 5, 2021
Site 25 Construction Erosion Inspection Part 2
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January 4, 2021
Site 25 Construction Erosion Inspection Part 1
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December 28, 2020
Taxiway Lima Drive by Erosion Inspection
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November 16, 2020
A Final Inspection
I am conducting a final inspection of erosion controls at a former staging area. Some of the best management practices shown are: silt fence, straw wattles, and hydroseed.
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November 4, 2020
Silt Fence Inspection
This silt fence looks pretty ugly and inspection shows it certainly needs maintenance; but does it? The silt fence made sense before we excavated several feet, now it doesn’t. There is a turbidity curtain in the river to the right and the contractor is careful to pull material back from the riverbank. I am going to let this go.
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May 4, 2020
Drive-by Silt Fence Inspection
It doesn’t take more than a few seconds during a drive-by inspection to see that this silt fence has problems. While the risk of sediment discharge is low, the condition of the fence says to me ” We don’t really think this TESC stuff is all that necessary.” If it was my job to inspect, I would be making a “U” turn to have a chat.
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April 17, 2020
Construction Inspection-Container Crane Rail Removal
We are upgrading the dock to handle larger container ships so, the old cranes, and rails that they travel on must be removed. This is at the end of the “water-side” crane rail. This trench, or slot, is several hundred feet long. When it rains, it will fill with rainwater and overflow into the bay.
The trench is filled with dirt and concrete debris left over from the demolition and removal of the old rail, so the water will be turbid and have elevated pH. I told the contractor to block the end of the trench before it rains again, using cold patch asphalt or some other method of their choosing.
Because construction erosion and sediment control is about managing rainwater, I always look for ways water can discharge from a project. This is not something that would have been caught in the planning stage of the project.
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February 25, 2020
Construction Erosion Inspection-Turbid Discharge
My construction erosion inspection turned up a turbid discharge. A little bit of sediment track out each day builds up. The contractor was vacuum sweeping this area on a regular basis but the first rain shows how effective that was. I measured this discharge at 6000 nephelometric turbidity units (NTUs) using an old Hach 2100P turbidimeter. This meter only reads up to 1000 NTUs, so I had to dilute the sample 3 times to determine the actual reading.
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