BMPs Demonstrated at Summit provide ideas for Slide/Slope Failure Repair

Redding received over 10″ of much needed rain in January. But all that rain and the saturated soils led to a small slope failure on the Palisades Trail. You may remember the way we treated the “seeping” slopes two years back, with 2″ compost, native grass, mycorrhizae, all reinforced in Enka Mat and then sprayed with Flexterra (known as Green Armor System) Palisades Trail update

Well, we learned a few things at the last couple of Shasta College Summits, including some innovative uses for Compost Socks and how to use and install the Gripple Anchor System.  When Terry Hanson called and said there was a small landslide above the trail.  He informed us he had a CCC crew scheduled, very little budget, and another batch of storms were expects.  Dis we have any ideas, and could we provide a prescription. The College had some products remaining from the Summits we could probably donate, primarily in the form of Filtrexx Compost Siltsoxx and Filtrexx Compost Grosoxx and some Biaxial geogrid.  Terry had some 2010 Enka Mat.  Our prescription was to excavate the heavy failed clay material as feasible and then pack the slide face with Compost Socks.  The sock would be enveloped in Enka Mat and Geogrid and then anchored to the slope.  We decided to use the new Gripple Anchors (altogether we used about 45 anchors) system to anchor the materials to the slope and counter the outward forces.

It was fortunate that we had both green Siltsoxx (more designed for filtration) and the Grosoxx which are designed with more of a growing medium.  Since the slide area is still draining, the green socks may aide drainage while the black growsox may do a better job growing native grasses.  We will get to follow the project through time. 

PHOTOS WILL BE POSTED SOON 

 

By John

John McCullah has an AA degree in Biology and a BS in Watershed Geology. He has CA contractors license since 1990 and has been performing erosion control and restoration work for over 25 years. John has been a Certified Community College Instructor since 1996, developing curriculum and teaching at Shasta College in No. California. John is a recognized expert in erosion control, stream and watershed restoration, and technical training. He has had specialized adult educator training while teaching state-wide storm water courses for California Department of Transportation - from 2001 through 2011. John is also certified as a QSD and QSP (Qualified SWPPP Developer and Practitioner) and he is a Trainer of Record for these CA professional requirements. He has authored 3 complete Best Management Practice Manuals and helped develop new BMPs with California Department of Transportation Division of Landscape Architecture, particularly Steep and Adverse Slopes. John has been teaching professional development courses for IECA since 1996. His popular ‘Best of the BMPs’ course is constantly being updated to reflect new technology, materials, and practices. The Dirt Time video series was produced as a means to present hands on learning experiences to the classroom. There are now over 15 Dirt Time episodes and 50 video clips available. John has designed and built many environmentally-sensitive river and stream projects over the last years, projects ranging from California to Alaska, and Alberta Canada to New Zealand. As an academic and practitioner with dozens of case studies and Dirt Time clips, John’s trainings are filled with first hand, practical experiences. He recently co-authored Bioengineering Case Studies - Sustainable Stream Bank and Slope Stabilization published in 2015 by Springer.