This is the temporary erosion and sediment control plan sheet for a fill project. The pond can’t be built until almost 90 feet of fill is placed. Because of this, dirty water can’t be managed until later in the project.
June 5, 2020
December 18, 2020
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.
June 1, 2020
Lake Emelia in Port Orchard
This was a 2 inch in 24 hour storm, or about a 2 year storm event, which should have been pretty easily contained if the pond had been designed as a temporary sediment pond for use during construction. Also, they should have had a construction stormwater treatment system set up to treat for turbidity. There really is no excuse for this. Poor planning.
November 26, 2015
Rainy Season Preparation
Preparing for the Rainy Season
David S. Jenkins
WSDOT Statewide Erosion Control Coordinator
September 1997
Now that the El Nino has ended and the La Nina has begun, the National Weather Service is predicting a much wetter fall and winter than normal. So, what are some things you can do now to prepare? How about: (more…)
September 4, 2012
September 27, 2020
Erosion Control Photos
All photos may be used for teaching and training purposes with attribution to: David Jenkins, sheetflow.com
Photos may not be used for commercial purposes without prior express permission from David Jenkins, sheetflow.com
July 7, 2020
Sed Cage
Sed Cage is a catch basin protection best management practice that seems to work well at ponding water so sediment can settle out. The Sed Cage filters sediment but plugs up, becoming a barrier. It can an be reused if taken care of and cleaned after each use.
June 20, 2018
Pump Plug and Infiltration
Pump Plug and Infiltration Pond Used to Dispose of Turbid Water-
Construction erosion and sediment control means managing storm water until the permanent storm water system is functional.
We managed storm water from this 3 acre site by pumping turbid runoff to an on-site, infiltration pond.
June 16, 2016
Paying for TESC
The Best Way to Measure and Pay for TESC in Public Works Contracts
It is a big mistake to make temporary erosion and sediment an “incidental” item in a public works contract. Anything that can be measured should be and set up as a Unit Price item. Planning and Implementation can be lump sum but measurement and payment must be clearly specified. Force Account is set up for unforeseen conditions; the amount is set by the owner so that everyone bids the same number. Make clear at the pre-bid meeting that the Lump Sum bid for planning and implementation covers lots of stuff and they need to bid accordingly. Here is an example of the best way to pay: (more…)