Sheetflow Construction Erosion and Sediment Control

July 30, 2019

Sediment Trackout Fail

Photo: Dave Jenkins

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!

July 26, 2019

Down the Drain it Goes

Photo: David Jenkins

Then the sediment washing off of the uncovered stockpile drains into a catch basin which drains into a small salmon stream.

July 25, 2019

Nope, Just an Uncovered Stockpile after a Rain Storm

Photo: David Jenkins

July 24, 2019

River Delta from Space?

Photo: David Jenkins

July 23, 2019

Lobster Protection in Portland, Maine

In Washington, it’s salmon protection.

July 20, 2019

Water-filled Diversion Berm

Photo: David Jenkins

I am always looking for products and materials that achieve the goal of environmentally friendly erosion controls, such as this reusable best management practice.

Specification
Materials

A. Berm shall be a minimum 6 inches high and 10 feet long and made of 10 mil polyurethane or 22 oz. PVC.

Construction Requirements
Water Filled Diversion Berms

a. Water filled diversion berms shall be installed such that offsite water is prevented from entering the job site and site water is kept within the project boundary.
b. Berms may be used to prevent contaminants and water from entering catch basins.
c. Berms may be used on impervious surfaces.

Payment
O. Payment for “TESC – Water Filled Diversion Berms” will be made at the contract unit price per each per month as stated in the Schedule of Unit Prices, and shall be full compensation for furnishing the specified diversion berms. The unit price per each shall include the cost of mobilization/demobilization, cleaning, hauling and all incidentals for the number of diversion berms required by the Engineer for the duration of the contract.

July 16, 2019

Tree Protection Using Orange Safety Fence

July 9, 2019

Managing Construction Stormwater on Concrete Tiltup Building Project

Video: David Jenkins

July 2, 2019

Biofence Specification

I am trying to get to 100% biodegradable, recycled, reusable, recyclable, low impact best management practices.  I have used burlap fabric fence several times, anytime it makes sense, really.  I use it whenever I can leave it in place to degrade, like on habitat or wetland work.  In one of the photos, plastic zip ties are used to attach the fabric to the wooden stakes; this is a mistake and has been changed to staples in the specification.

Biofence Specification

Materials
U. BIOFENCE
A. Biofence shall consist of 7 ounce or heavier uncoated burlap fabric at least 36 inches wide and 100 feet long. Wood stakes dimensions shall be a minimum 1 1/8 x 11/8 inches by 42 inches high.

Construction Requirements
18. Biofence
a. Stakes shall be driven into the ground a minimum of 12 inches and be spaced no more than 6 feet apart.
b. Fence ends shall be joined by wrapping ends together around a post 3 times and driven into the ground.
c. Burlap fabric shall be attached to the post in at least 3 places using staples or other method approved by the Engineer.
d. When used as a barrier fence, fabric shall not be trenched into the ground. When used as a silt fence, a minimum 8 inch flap shall be left at the bottom and held in place with straw wattles staked in as detailed in item 9 above.

Payment
C. Payment for “TESC – Biofence” will be made at the contract unit price per linear foot as stated in the Schedule of Unit Prices and shall be full compensation for furnishing all labor, equipment, materials and tools necessary to complete the installation of the biofence as detailed on the drawings or as directed by the Engineer and specified herein. The unit price shall include all maintenance, the removal of biofence, and restoration of the area at the completion of the work

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