Here is a nice, plastic covered slope. They have placed sand bags on the seams, the seams are overlapped at least 12 inches and the plastic is run all the way to the bottom of the slope. This is a riverbank habitat restoration project on the Duwamish Waterway.
October 13, 2020
September 30, 2020
Slope Covered with Plastic
We have covered a slope above the Duwamish Waterway with plastic until landscaping occurs in December. The contractor has done a great job overlapping the plastic sheets and securing them with sand bags.
March 31, 2020
Straw Wattle on Slope Stops Rills
This straw wattle on a slope stops rills before they can completely form.
December 24, 2019
Shortening Slope Length
In this video, I discuss shortening slope length with coir logs installation methods.
December 10, 2019
Creative Contractor Makes Slope Tracking Excavator Bucket
Leave it to the creative contractor to come up with creative solutions. Confronted with a small, steep slope and wet soil, the contractor didn’t want to risk walking a small caterpiller up and down to roughen it before hydroseeding. Using some angle iron and an excavator bucket, they welded up a slope tracker. The operator tamps the slope with the bucket just like they are compacting the slope. This is the result.
November 19, 2019
A Little Rain on Roughened Slope
This video shows the effect of a little rain on a roughened slope that has a high percentage of silt.
April 7, 2018
Slope Drains
Pipe slope drains are a great best management practice for conveying water down to the base of a slope. Water allowed to flow over a slope will cause rills and gullies to form, depositing tons of sediment at the bottom of the slope. This clip shows a good application of a pipe slope drain, except the pipe doesn’t go to the base of the slope.
July 7, 2016
Water Flow Over Slope Causes Erosion
Inspecting a project during a rainstorm is sometimes the best way to determine how storm water will flow around the site. It was clear, during this inspection, that the flat area above the slope was graded toward the slope face , which allowed water to flow over and down the slope, causing it to erode. If it was not possible to grade the area above away from the slope, a sand bag berm and a pipe slope drain could have been used to collect the water and convey it to the base of the slope.
February 10, 2012
Stabilize Cut and Fill Slopes
This shows how to stabilize cut and fill slopes using BMPs like trackwalking, topsoil and shortening the slope.