Sheetflow Erosion & Sediment Control Heavy Civil Construction

August 7, 2020

Secondary Containment-Almost

Photo: David Jenkins

August 6, 2020

Needs Secondary Containment

Photo: David Jenkins

August 5, 2020

U.S.S. Enterprise CV-6

A moment after kamikaze pilot Shunsuke Tomiyasu hit the forward elevator and put the Enterprise out of action for the rest of the war. Date: May 14, 1945. Photo Credit.

The U.S.S. Enterprise was the most decorated ship of World War 2. Here is a video clip of the damage.

Happy 99th birthday, dad. Cyril A. Jenkins, AM 1C

August 4, 2020

Glacial Erratics

Filed under: Photo — Tags: , , , — Sheetflow @ 2:09 am
photo: David Jenkins

Glacial erratic boulders at Sea-Tac International Airport excavated during runway construction.

August 3, 2020

More Infiltration

Photo: David Jenkins

Another example of using infiltration to manage excess, relatively clean, stormwater during construction. As water builds up around the covered catch basin, is flows into the area to the right and infiltrates, preventing flooding.

Photo: David Jenkins

Closeup of double plastic layers under catch basin grate and infiltration area.

July 31, 2020

Catch Basin Covered-Infiltration

catch basin covered to allow infiltration of construction stormwater in hole cut in asphalt and filled with rock
Photo: David Jenkins

This is the first project we have cut asphalt to allow construction stormwater to infiltrate. The area is paved, flat. The sweeper runs constantly but the water is still too turbid to go down the drain. The fill soil under the asphalt is sandy. If we just covered the catch basin with 30 Mil PVC, the area would just flood, then drain to another catch basin. Solution? Cut out a section of asphalt full depth to the sandy soil, fill with 3 to 5 inch rock. This way the water infiltrates but vehicles can drive over the hole. This is working really well so we will be doing this on future container dock upgrade projects.

July 30, 2020

Compost Sock Maintenance

Photo: David Jenkins

Compost socks work really great around catch basins but need to be maintained. This doesn’t necessarily need to be replaced but the tear needs to be wrapped with plastic or netting. Safety cones or candles might keep people from backing over them.

July 29, 2020

Compost Sock Installation

Photo: David Jenkins

Compost socks need to overlap on each end to maintain a continuous berm. 8 to 12 inches works well. Consider this when figuring out how many you need.

July 28, 2020

Compost Sock Perimeter BMP

Photo: David Jenkins

Compost socks are a better perimeter control BMP than straw wattles as they have much better contact with the asphalt surface. However, they do have to be well maintained and protected as they can rip.

July 27, 2020

BMP Graveyard-Straw Wattle

Photo: David Jenkins

Another ten year old straw wattle and the plastic is partly degraded but mostly too strong to pull apart.

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