Engineered Earth Armoring Solutions™

Engineered Earth Armoring Solutions™

Todd Larson

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Manufacturing Experience

• ISO 9001:2008 Certified Facility

• American Association of Laboratory Accreditation (A2LA)

• GAI-LAP Accredited Testing Laboratory

• Manufacturing Quality Control (MQC) Program

• Manufactured Woven TRM/HPTRMs since 1994

• Manufactured in the USA

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Engineering & Construction QC Experience

Slope Stability Analysis & Design Hydraulic Analysis & Design

Plan & Detail Generation Testing & Field Support

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Problem: Earth Moves

Accelerated Erosion = Natural Erosion + Human Activities

• Construction• Poor Stewardship• Removal of

Vegetation• Increased

Impervious Areas

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US Clean Water Act Regulation Facts

• US$13 Billion Cost Annually

• Over US $1 Billion removing sediment from waterways annually

• EPA estimates sediment removal from reservoirs costs US $500 million annually.

• Annual water storage replacement costs from sediment range from US $2 to US$6 billon

The Driving Force:

• EPA Environmental Protection Agency – Via Clean Water Act (CWA)

NPDES – National Pollutant Discharge Elimination System:

• Use of Best Management Practices for NPDES Compliance (EPA TRM Fact Sheet)

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Hard Armoring Traditional Solutions Rock Riprap Slopes

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Hard Armoring Traditional Solutions Rock Riprap Channels

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Paved Concrete Channel

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Which one?

• What looks better?

• Which is a BMB?

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Slope Protection!

• Again?

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Hard Armoring "Progressive" Solution“Outside the Box”

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Soft Armoring "Progressive" Solution

“Outside the Box”

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EEAS = Improved Water Quality

• EPA Clean Water Act

✓ Restore the Chemical, Physical & Biological Integrity of US Waters

• Clean Water is vital

✓ Pollutant Removal

✓ Groundwater Table Recharge

✓ Irrigating Crops

✓ Livestock

✓ Wildlife/Aquatic Life

✓ Fish Consumption

✓ Recreation

✓ Reservoir Storage

✓ Public Drinking Water Supply

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Engineered Earth Armoring Solutions (EEAS) – Alternative Solution

SYSTEM H

PTRM/TRM

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EEAS = Reinforced Vegetation

Root ReinforcementStem Reinforcement

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EEAS = Reinforced Vegetation

Turf Reinforcement Mat (TRM)• Synthetic Material

• Vegetative Growth

• Stitch Bonded or Woven

• <3,000 lb/ft Tensile Strength

High Performance Turf Reinforcement Mat (HPTRM)

• Synthetic Material

• Vegetative Growth

• Homogenous Woven

• ≥3,000 lb/ft Tensile Strength

• Improved Performance

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Unreinforced Vegetation

Do Nothing

RAISING THELIMITS OFNATURAL

VEGETATION

LIMITS OFNATURAL

VEGETATION

16 lb/ft2 SHEAR STRESS25 ft/s VELOCITY

2 lb/ft2

SHEAR STRESS

EEAS = Raising the Limits of Natural Vegetation

10 lb/ft2 SHEAR STRESS18 ft/s VELOCITY

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Which TRM Or System Should I Use?

Stitch Bonded/Woven TRM

or

High Performance TRM (HPTRM)

or

Engineered Earth Armoring System (HPTRM + Engineered Earth Anchor)

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Design Life

Determined based on:

• Durability✓ Ultraviolet (UV) Resistance

• Ultimate Tensile Strength✓ Material Quality

• Hydraulic Stresses✓ Velocities/Shear

• Non-Hydraulic Stresses✓ Heavy Mowing Activity

✓ Maintenance Loading

✓ Debris Loading

✓ Animal Loading

✓ Wildlife Burrowing

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Non-Hydraulic Stresses – Heavy MowingFHWA HPTRM Requirements

Federal Highway Administration (FHWA):

recommends minimum tensile strength

3,000 lbs/ft (44 kN/m) when long-term

durability is of concern.

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ARMORMAX® 75

ARMORMAX® = Engineered Earth Armoring Solution™ composed of:

PYRAMAT 75 High Performance Turf Reinforcement Mat + Engineered Earth Anchors (EEA™)

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• Flexible/Soft armoring solution for slopes, channels, levees, spillways

• Expanded Engineering Applications

✓Critical structures

✓Wave overtopping

✓Erosive forces

✓Shallow plane slope stabilization

✓Underwater protection

✓Wave run-up

✓Higher Factor of Safety

• Vegetation provides environmental and aesthetic benefits

ARMORMAX® 75

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ARMORMAX® 75

• Engineered Earth Anchors are

designed to provide resistance

to shear and lateral forces, and

embedded beyond the predicted

plane of failure

• HPTRM distributes loads

amongst anchors while providing

a continuous compressive cover

• HPTRM is also permeable for

pore pressure relief and

promotes vegetative

establishment

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Engineered Earth Anchor

• Percussion Driven Anchor

• Type B1 Anchor

✓3-5 ft (0.9-1.5 m) length

✓200-600 lbs (0.89-2.67 kN) pullout resistance

• Type B2 Anchor

✓6-12 ft (1.8-3.6 m) length

✓800-2,000 lbs (3.56-8.90 kN) pullout resistance

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Bartlett Boulevard – Bartlett, TN

ARMORMAX® 75 Slope Stabilization

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ARMORMAX® 75 Dam Slope Stabilization Combined with other BMPs

Club Lake Dam – Greenville, TX

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ARMORMAX® 75 Spillway Installation

Lake Olgetree Spillway Modifications – Auburn, AL

Engineered Wrap-face

Vegetated Solution

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FEATURES & BENEFITS

• Immediate erosion protection upon installation

• Vegetated BMP for:✓ NPDES Storm Water Compliance

✓ Improved water quality

• PYRAMAT 75 provides:✓Superior UV resistance

✓Durable, permeable and vegetated wall face

✓Trilobal X3® Fiber Technology improves vegetation establishment

• PYRAWALL height/steepness ✓1H:4V (max.)

✓7-ft height with no with primary geogrid reinforcement

✓Can be used with primary geogrid reinforcement for higher walls/slopes

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Engineered Wrap-face Vegetated Solution for Constructing Reinforced-Earth Walls and Steepened Slopes

New Best Management Practice

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• Interlaced bracing :✓Eliminates the need for

temporary metal bracing or forms

✓Environmentally inert and not susceptible to corrosion

• Flexibility of system allows for:✓Curves to be incorporated

✓On-site soil to be used for infill

• System is easily transported

• Available in Green or Tan

FEATURES & BENEFITS

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BRACE ASSEMBLY

Step 1 Step 2 Step 3 Step 4

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CONSTRUCTION SEQUENCE

Completed Wall Prior to Vegetation

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DESIGN – WALL STABILITY

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DESIGN – GLOBAL STABILITY

Shoreline Defense System (SDS)

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Introducing SCOURLOK Shoreline Defense System (SDS) for vegetated shoreline applications

• Bank protection

• Toe protection

Shoreline Defense System

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Typical Section

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• Metal frame basket

✓ Material - Galvanized/S.S.

✓ 3-ft W x 3-ft D x 4-ft H

• Pre-assembled units

✓ Internally lined w/ durable geotextile

✓ Externally lined with PYRAMAT

• Each unit = 5 baskets = 15-ft long

• Outside pocket filled with mulch or other growth media for vegetation

System Components

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• In-Situ Soils

• up to 15% organic

• Gravel and rock

• up to 3-inches

• Dredge (coastal)

Fill Material

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With ARMORMAX®

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DESIGN – WALL STABILITY

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DESIGN – GLOBAL STABILITY

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Summary

LANDLOK TRMs• > 25 Years• > 20 Million SY

PYRAMAT TRM/HPTRMs• > 20 Years• > 14 Million SY

ARMORMAX• > 10 Years• > 5 Million SY

• Tested, Approved, and Specified by USACE

• Validated Field, 3rd Party UV and Hydraulic Testing

Closing Questions - Comments