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Creek Diversion for Restoration Work

By Dave Jenkins posted 12 days ago
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Some of the steps to consider, plan for, and specify during creek restoration work in a salmon creek: Install fish screens, Electro-shock fish, Relocate Fish, Install check dams to keep water out of the work area Pump and convey creek water, Complete work, Slowly re-introduce creek, Pull out check dams, Remove fish screens #CreekDiversion #Restoration Video: Dave Jenkins, CPESC ​​
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Silt Fence Overlap

By Dave Jenkins posted 12 days ago
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#siltfence #overlap Here is a method for joining two pieces of silt fence. Video: Dave Jenkins, CPESC ​​​​​​
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Horizontal Silt Fence

By Dave Jenkins posted 19 days ago
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On vacation, while walking around South Congress district south of downtown Austin, I discovered a new best management practice-horizontal silt fence. This makes access to the work area so much easier! Photo: Dave Jenkins, CPESC ​
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Geotextile-Foam Check Dam

By Dave Jenkins posted 26 days ago
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Yet another example of poorly installed and maintained check dams. Even worse, it’s hard to install geotextile-foam check dams incorrectly. Here is an installation detail to use as a guide for proper installation: Geotextile-encased Check Dam #Geotextile #checkdam Video: Dave Jenkins, CPESC ​​
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Construction Erosion Control Inspection June 2013

By Dave Jenkins posted Feb 22, 2023
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Inspecting a small but busy construction project, checking for things that might be out of compliance with specifications and permits. #ErosionControl Video: Dave Jenkins, CPESC ​ ​
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Hog Fuel to the Rescue

By Dave Jenkins posted Feb 15, 2023
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Construction Erosion Inspection Hog Fuel Mulch Prevents Fugitive Dust – You are hauling dirt on a dry day and the dust is flying. The water truck driver’s head is about to explode trying to keep up with the dust control. Save yourself a Labor and Industries claim! Use ground up vegetation (hog fuel)! Don’t haul it to the landfill. #hogfuel Video: Dave Jenkins, CPESC ​​
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Dude, Where's My Tire?

By Dave Jenkins posted Feb 08, 2023
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Dude, where’s my tire? The driver had just left the Superfind site with a load of Subtitle D soil. He should have checked his nuts before he left. Photo: Dave Jenkins, CPESC
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Denver Dirt Pile

By Dave Jenkins posted Feb 01, 2023
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Just a nice dirt pile in Denver. Walking around between presentations at the International Erosion Control Conference in February 2019 and saw this. A little utility work in the street, going to reuse the excavated dirt, placed it on plastic, put some berms around base, no rain in the forecast and the dirt goes back in the hole later in the day so no need for cover. #Excavation #stockpile Photo: Dave Jenkins, CPESC ​​​ ​
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Turbidity 1-25-250 NTUs

By Dave Jenkins posted Jan 25, 2023
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Photo: Dave Jenkins, CPESC The sample on the left is just under 1 NTU , the middle is 25 NTUs, and the one on the right is 250 NTUs. In Washington state, the Construction Storm Water General NPDES Permit lists benchmarks that construction discharges must meet. These are: 0-25 NTUs everything is cool; 26 -249 NTUs not so good, upgrade your site best management practices ( BMPs ) and modify your SWPPP ; 250 NTUs and above, call the Dept. of Ecology , upgrade BMPs, modify the SWPPP and monitor the water body that the project discharges to until you are in compliance. #turbidity #NTU ​​​
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Sediment Trackout-Not What an Inspector Wants to See

By Dave Jenkins posted Jan 18, 2023
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I just did a quick, random, drive-by of a job and this is what I as the inspector saw. This might tell me that the construction staff, owner and contractor, don’t understand what is required or, haven’t read the TESC specifications. Since this was a random, unannounced, drive-by, I might think that this is not an isolated incident. While I prefer a site be kept clean, as long as stuff doesn’t leave the project boundary, I don’t have an issue. However, by not keeping the site clean, trackout is inevitable. Also, note the Bobcat broom sweeper just inside the fence on the left; these are great for pushing dirt around and up in the air but we only allow vacuum ...
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Bonded Fiber Matrix Needs to Cure

By Dave Jenkins posted Jan 11, 2023
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Bonded Fiber Matrix (BFM) needs to dry for 24 to 36 hours before it rains or else it can start to wash off. Video: David Jenkins, CPESC
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Sand Bag Berm Part 3

By Dave Jenkins posted Jan 06, 2023
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In this sand bag berm part 3 video I show the amount of rain runoff diverted away from a project versus the turbid site water. Video: David Jenkins, CPESC
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Sand Bag Berm, Part 2

By Dave Jenkins posted Jan 05, 2023
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In this sand bag berm part 2 video I show the amount of rain runoff diverted away from a project compared to the water falling on the bare dirt of the project. #SandBag #Berm Video: Dave Jenkins, CPESC ​​
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Sand Bag Berm Part 1

By Dave Jenkins posted Jan 04, 2023
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In this sand bag berm part 1 video I show the amount of rain runoff diverted away from a project. #SandBag #Berm Video: Dave Jenkins, CPESC ​​
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Knocking off Early

By Dave Jenkins posted Jan 01, 2023
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We were working on a Superfund site one cold December night on the Duwamish River in Seattle. It started to snow and things got slippery. We knocked off early. Do you have photos of your work experiencesyou want to share?
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Rough vs. Smooth Slope

By Dave Jenkins posted Dec 28, 2022
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This is a dramatic example of the effect of rainfall on a Rough vs Smooth slope. The rough side was “track walked” using a small Caterpiller tractor. The other side was “back-bladed” smooth with the same tractor. Both test plots were prepared with the same soil and then sprayed with bonded fiber matrix (BFM) with seed and fertilizer. Video: Dave Jenkins, CPESC
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Sediment Trackout Fail

By Dave Jenkins posted Dec 21, 2022
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I’m not a big fan of the “Grizzly” method of trackout prevention. My standard is “No visible trackout” and these have never met that standard. Preventing tires from getting dirty in the first place is still the best BMP! This is a trackout fail. Photo: Dave Jenkins, CPESC
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Migratory Bird Treaty Act Nest  Removal

By Dave Jenkins posted Oct 26, 2022
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Tags: BMPs, building demolition,contract specifications, demolition, eggs, Migratory Bird Treaty Act, migratory birds, nest removal, seagulls, specifications, waterfront Seaport building demolition scheduled for spring summer. Starting in April or May, seagulls begin nesting. When seagulls nest and lay eggs, you can’t demolish the buildings until you apply for and get permission for a “Take” of a bird covered under the Migratory Bird Treaty Act. This takes time, holds up the contractor, everyone gets frustrated. In order to head this off, I wrote some contract specifications: Photo: Port of Seattle NESTING BIRD WATCH AND ...
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Rock Construction Entrance

By Dave Jenkins posted Oct 19, 2022
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Tags: Best Management Practices, BMPs, cescl, construction erosion, erosion and sediment control, rock construction entrance, sediment trackout You can’t ask too much of a rock construction entrance. We installed this according to the state stormwater manual. This is the exit from a very small compost stockpile area. If the trucks could have stayed on the rock to be loaded out we wouldn't have had trackout. It's not much but it adds up and will cause non-compliant discharges when it rains. What have you used instead of rock entrances to prevent trackout? Photo: Dave Jenkins, CPESC Photo: Dave Jenkins, CPESC
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Straw Wattles Used on a Slope

By Dave Jenkins posted Oct 12, 2022
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Tags: BMPs, construction erosion, erosion control, slope, straw wattle A video showing some of the benefits of using s traw wattles on a slope. Video: Dave Jenkins, CPESC
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