Sheet Flow Construction Erosion Control

June 11, 2020

Phasing a Stockpile Project to Prevent Dirty Runoff From Draining to Wetlands

Image: David Jenkins

Phasing a Stockpile Project

Phase 1-

(A) Install silt fences on perimeter and at base of future stockpile.

(B) Clear, grub, grade, construct drainage ditches and temporary stormwater pond including outlet structure and perforated pipe level spreader drains. Grade to drain water away from outer perimeter silt fence and toward ditch.

(C) Hydroseed and install blankets in ditch line.

(D) NOTE: Background stockpile, built later, used an early generation construction stormwater treatment system and discharged to creek instead of level spreaders into vegetation.

Phase 2-

(A) Place and compact fill material to approximately 20 feet of vertical elevation.

(B) Trackwalk and hydroseed slope.

Phase 3-

(A) Same as Phase 2.

(B) Same as Phase 2.

Phase 4-

(A) Place and compact fill material to approximately 20 feet of vertical elevation. Start base of slope 15 feet in from lower fill and grade to drain away from lower slope and to the stormwater pond.

(B) Trackwalk and hydroseed slope.

(C) No hydroseed on top of the pile as material is continually brought in as available.

February 24, 2020

Clean Up and Restoration of Lora Lake

Video: David Jenkins

I took this after the clean up and restoration of Lora Lake. The lake wasn’t a lake but a water-filled hole created from peat mining. Contaminated stormwater runoff impacted the bottom sediments.

September 19, 2013

Lessons in Solving Big Weather-Related Problems

Grading and Excavation Contractor
September-October 2003

Lessons in Solving Big Weather-Related Problems

When it comes to controlling erosion and sediment in bad weather, construction of a third runway at Seattle-Tacoma International Airport, near Seattle, WA, qualifies as a genuine challenge. Providing a foundation for the 8,500-ft.-long, 150-ft.-wide runway in the hilly terrain will require an estimated 17 million yd.3 of fill. Since construction began in 1997, about 5 million yd.3 have been placed. It will take a large fleet of dump trucks, running 20 hours a day, three and a half years to bring in the rest. Then there’s all that wet weather the area is famous for, especially in late fall and winter. Two years ago, for example, the project was drenched with about 5 in. of wind-driven rain in one 36-hour period. (more…)

June 2, 2013

Prominent Pierce County Developer Sentenced To Prison For Criminal Violations Of Clean Water Act

Prominent Pierce County Developer Sentenced To Prison For Criminal Violations Of Clean Water Act


One of First Prosecutions in the Nation for Stormwater Violations

FOR IMMEDIATE RELEASE

October 10, 2012

A prominent Sumner, Washington developer was sentenced to prison today in U.S. District Court in Tacoma for a felony violation of the Clean Water Act. BRYAN STOWE, 65, was sentenced to six months in prison, one year of supervised release, and a $300,000 fine for knowingly violating a national pollution discharge elimination permit. In addition, STOWE will make a $100,000 payment to the National Fish and Wildlife Foundation for environmental projects targeting resources impacted by the illegal discharges. STOWE, as president and co-owner of Stowe Construction, Inc., admitted knowingly violating the Construction General Storm Water Permit for the Rainier Park of Industry project, located on West Valley Highway in Sumner. Permit violations contributed to two major landslides at the site in 2010 and 2011. Both slides forced closure of the West Valley Highway. This case is one of the first storm water pollution criminal cases brought in the United States. At sentencing U.S. District Judge Ronald B. Leighton referenced the Clean Water Act saying, “These regulations serve a broad and useful purpose. You violated them persistently. You were wrong.” MORE…

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