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    Entries by WatchYourDirt (159)

    Tuesday
    Mar032015

    Project: Hwy 44 Trail, Redding, CA

    This trail above Hwy 44 in Redding will take walkers to awesome vistas.

    However it "cuts" through some ancient river aggregate, semi-consolidated , with cobbles, gravel, sand, clay and a really nasty shrink-swell clay from old lake or?? When it rained big a few weeks back the water oozed out of the slope. What can be the fix? A retaining wall with drainage? soil nailed wall? Something very engineered and expensive?

    We are going with compost (will encourage deep rooted native bunch grass (nasella pulchra) that will ultimately anchor and reinforce the soils) but the compost and soils need to be reinforced with ENKA Mat first. We decided to use anchors (long pins 12-18" long) that will "push back" at the forces "weeping out". We added mycorrhizae to provide the symbiosis needed for the grass. We also decided upon a 50/50 mix of compost and sandy loam soil import to 'fill in' eroded areas.

    Click to read more ...

    Tuesday
    Oct072014

    The Dirt Time 'Complete Works'

    The Dirt Time Complete Works is now available!

    The Complete Works is divided up into two DVD sets - The BMP (Best Managed Practices) set and the BioEngineering Set.  They are available together for only $299 or separately for $175.00 each.  

    Order them now at the WatchYourDirt Shop (Click Here).

    Here's what is on each of the four discs...

    BMP Set Disc One 

    • Hydromulch
    • Hydromulch on a large area cover up
    • Compost Blanket
    • Blown Straw
    • RECP / Erosion Control Blankets
    • Silt Fencing
    • Sediment Ponds
    • Theory of Ditch Check
    • Gravel Ditch Checks
    • Gravel Bag Ditch Checks
    • Fiber Rolls Ditch Checks
    • Triangular Silt Dike Ditch Checks
    • Enviroberm Ditch Checks
    • Hay Bales:  The Good & The Bad
    • Straw Talk - A discussion about different straw types and straw theory 

    BMP Set Disc Two

    • Articulate Concrete Blocks
    • Low Water Crossings
    • Stabilized Construction Entrances - Traditional
    • Stabilized Construction Entrances  - Rumble Strips
    • Turf Reinforcement Mats in a Channel
    • The 'Green Armor System'
    • Energy Dissipators - Traditional (rock)
    • Energy Dissipators - ScourStop
    • Extreme Slope Stabilization
    • Extreme Slope Stabilization - Update (6 months later)

     

    BioEngineering Set -  Disc One

    The Willow Creek Project (Follows a large Scale Riverbank stabilization from start to finish), detailing...

    • Rock Vanes
    • Longitudinal Peak Stone Toe Protection (Rock Toe)
    • Slope Prep & Trackwalking
    • Soil Nailing
    • Hydromulching
    • Fiber Rolls
    • Gully Repair
    • Live Willow Staking
    • Live Siltation
    • Modified Brush Layering
    • Soil Flaps
    • Slope Stabilization 

    BioEngineering Set - Disc Two 

    • Rock Vanes
    • Large Woody Debris
    • Live Pole Drains
    • Modified Brush Layering (2)
    • Vegetated RipRap
    • VMSE (Soil Wrapping)

     

    ORDER YOUR COPY HERE!

    Tuesday
    Sep302014

    It's coming - The BioEngineering Set!!!

     We are pleased to announce one of our newest creations!

    The BioEngineering Set includes to jam packed DVDs geared towards well - BioEngineering!

    Please feel free to contact us at watchyourdirt@gmail.com for more information and how to reserve your copy today!!!

     Or visit our Online Store at watchyourdirt.bigcartel.com

    - The Dirt Time Team

    Wednesday
    Sep242014

    Sg. Pedu is COMPLETE!!-

    This was quite a project for sure!!  Remember the purpose was to increase the low-flow water surface elevation so the irrigation pumps can draw water.  

    This multi-million $$$ irrigation project serves the regions rubber tree, banana, and fruit plantations and rice growing.  The facilities are co-managed by JPS (Malaysian Department Irrigation and Drainage) and MADA (Malaysian Agricultural Development Authority).


    Construction  started about August 16.  At first work was a little slow while we coordinated all the heavy equipment and rock delivery.  Transportation of the bigger rock needed was problematic because it was difficult to dump and could easily damage the trucks - lost a couple of tailgates and sideboards!!


    We also had to disassemble the existing gabion baskets.  The Gabion Check Dam was built a couple of years prior.  It was indented to raise the low water surface elevation about 6-9 ft (2-3m) but the “mighty” Pedu River did “an end run” and eroded about 20m of the right descending banK.  We took down 2 layers of baskets (about 2 m), left one layer in place (which became our low-water bridge to the other side) and built an Engineered Newbury Riffle.  


    The riffle crest was about 30 m upstream of the old gabion crest and about 60 m downstream of the pumps.  The crest was approximately 2.5m high and the riffle is 40m long.  The design criteria for Newbury Rock Riffles (NCHRP Report 544) is 10 to 20:1  (riffle length:crest height).  We used over 3000m2 (or approx. 5600 T) of stone!!

    It was not feasible nor practicable to deliver or use 5000T of really large stone, that is probably why Gabions were the first choice.  What we did was used a mixture of well-graded, poorly-sorted angular granitic stone.  The rock graded from 36” (mean diameter) to 2”.  D50 was probably in the range of 12-16”.  


    Construction:  The most critical component and difficult construction is the required manner of laying the rock.  It takes quite a while to understand how to compress, buttress and build the structure - one does not simply place large rock on bottom, followed next larger etc.  I try to visualize “making” as many “contact points between adjacent rocks” as possible.  Really large rocks might have 3 or 4 contact points while a well-graded, self-launching stone has infinitely more.  

    Also the riffle must be built in a way to minimize turbulent flow while having as much surface roughness as possible.  


    We also build one Bendway Weir about 20m upstream of the Newbury Riffle.  Because the Pump House and structures are on a gentle bend in the river (the pump on inner bend) I determined a redirective structure would ensure the high flows went over the crest and not around the structure.  Additionally we laid a tie-back/keyway almost 300 ft into the Right descending bank!!


     The last two weeks of work was challenging because the communication and construction oversight had to be done long-distance.  The construction crew, with oversight from Osman and Wing, have became experts!!  Now we shall all wait and see and monitor how the structures.

    You can now see the structure and reach in its entirety.  

    Thanks for reading

    - John McCullah, Dirt Time TV Host

    Tuesday
    Sep022014

    An Excerpt from Bioengineering Case Studies : Stafford Slide

    Bioengineering Case Studies - by Wendi Goldsmith, Donald Gray, and our very own John McCullah, presents a range of well-documented case studies on key techniques and best practices for bio-stabilization projects. This publication also emphasizes evaluation and comparison of different techniques and challenges across a wide range of project types and geographies!

    Here is an excerpt from Bioengineering Case Studies with a quick look inside the book!


     

     This is another great Chapter from recently published Bioengineering Case Studies: Sustainable Stream Bank and Slope Stabilization. For more information on the compilation, including details on the authors AND how to order please see to: Springer.com/bioengineeringcasestudies.

    We now offer this brillant book in an ebook format!

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