Sheetflow Erosion Control Erosion Control for CESCL's

September 10, 2020

EXCAVATOR EATS BUILDING!

Filed under: Photo — Tags: , , , , , — Sheetflow @ 3:41 am
Excavator Eats Building. Photo: David Jenkins

Excavator Eats Building! I need to throw in an art shot now and then or this TESC stuff gets old.

September 9, 2020

Berm for Quarry Spalls

Quarry Spalls. Photo: David Jenkins

This would not have been my choice as a berm for quarry spalls; straw wattles are too light to use on asphalt and they allow water to flow under them. A compost sock, being heavy, would work better, though, they are prone to tearing. An asphalt berm might be best here.

September 8, 2020

Biodegradable Wattles

I wrote this biodegradable wattles specification for a riverbank habitat restoration project.

I wrote the last three sentences for this particular project, which has a 2:1 slope above an intertidal river. We will place 12 inches of compost before installing native plants this winter; without the wattles, wet compost will slide to the base of the slope.

BIODEGRADABLE WATTLES

  1. Wattles shall consist of 100% biodegradable straw, coir, excelsior or compost encased in 100% biodegradable fabric or mesh.
  2.  Wattles shall be a minimum of 8 inches in diameter free of cuts tears and damage.
  3. The installation of straw wattles shall be per WSDOT Standard Plan I-30.30-00 “Wattle Installation on Slope”.
  4. Wattles shall be staked in place using wooden stakes a minimum of 16 inches long.  The stakes shall be cut flush with the top of the wattles.
  5. Wattles shall be installed on the Site 25 slope above +12 elevation.
  6. Wattles shall be installed in two rows across the slope parallel to the 12 + elevation. 
  7. Rows shall be approximately 7 feet above the +12 elevation and 7 feet below the top of the slope.

September 7, 2020

Trash Bag Catch Basin Cover

Photo: David Jenkins

In an emergency, a heavy duty trash bag can provide catch basin protection until a more permanent BMP is installed.

September 4, 2020

What Every CESCL Should Know

Filed under: Web Site — Tags: , , , , — Sheetflow @ 2:37 am

Be sure to sign up: IECA Washington Virtual Connection: What Every CESCL Should Know, September 23rd and 24th online.

Wednesday, September 23rd
Thursday, September 24th

On-Demand Presentations – you will be notified as these are posted:

  • Improving Specification of Subsurface LID Measures with Jason Bailey, PE

September 3, 2020

Source of the Foam-Dewatering

Photo: David Jenkins

The contractor has to dewater to dig an excavation for an electrical duct bank-the water table is high. The soil is mildly contaminated so all of the water has to be treated in a Chitosan-enhanced Sand Filtration (CESF) system with granular activated carbon (GAC) before discharge to the waterway. The contractor set the well points, hooked them up to the pump but not the CESF system. So, water went directly onto the ground from the pump and into the nearest catch basin. The foam is from the silt in the soil that has been aerated by the pump.

September 2, 2020

Why is There Foam Around the Catch Basin?

Photo: David Jenkins

Why is there foam around the catch basin? I will give the answer tomorrow.

September 1, 2020

Compost Sock Damage

Photo: David Jenkins

Compost socks won’t take hard use. Constant movement and driving on them tears them up so they should be used in areas that don’t get much traffic or at the base of fence and jersey barriers.

August 31, 2020

Close Call Cut in Half

Photo: David jenkins?

Close Call Cut in Half

While driving pile, one hit a soft pocket and the pile “ran” 20 feet or so. The hammer came down, nothing there to hit, cable holding the pile driving hammer broke, the hammer fell, hit an excavator boom, bounced off and hit the boat.

The pile buck in the boat, having quick reflexes and a clean change of boxers, jumped into the bay just in time; no one hurt.

August 28, 2020

What Every CESCL Should Know

Filed under: Web Site — Tags: , , , , — Sheetflow @ 3:37 am

Be sure to sign up: IECA Washington Virtual Connection: What Every CESCL Should Know, September 23rd and 24th online.

Wednesday, September 23rd
Thursday, September 24th

On-Demand Presentations – you will be notified as these are posted:

  • Improving Specification of Subsurface LID Measures with Jason Bailey, PE
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