Overview of Canal Lining Projects. Montana Association of Dam and Canal Systems October 5 and 6, Jack Haynes EDC Canal Linings, LLC Owner

Overview of Canal Lining Projects Montana Association of Dam and Canal Systems October 5 and 6, 2011 Jack Haynes EDC Canal Linings, LLC Owner

Scope of Study 34 Test Sections installed 18 Exposed Geomembranes 5 Concrete (shotcrete or grout-filled mattress) 7 Spray or Wet Applied Membranes 4 Geomembranes with Concrete Cover Size 500 to 1,500 linear ft. (15,000 to 30,000 sq. ft.) Age 1 to 10 years

Types of Water Barrier Membranes (Geomembranes) Polyvinyl Chloride (PVC) High Density Polyethylene (HDPE) Low Density Polyethylene (LDPE) Linear Low Density Polyethylene (LLDPE) Very Flexible Polyethylene (VFPE) Very Low Density Polyethylene (VLDPE) Chlorosulfonated Polyethylene (CSPE) Reinforced Metallocene (mpe)

Types of Water Barrier Membranes (Geomembranes) Flexible Polypropylene (fpp) Prefabricated Bituminous Geomembranes (PBGM) Geosynthetic Clay Liners (GCL) Ethylene Propylene Diene Monomer (EPDM) Polyurethane Polyethylene Geocomposite (Composite)

ORIGINAL STUDY CONDITIONS TYPICAL BASALT SUBGRADES

EPDM

Ochoco Irrigation District Exposed 45-mil EPDM Installed November 1999

Ochoco Irrigation District Exposed 45-mil EPDM 11 years old

C C Hop Farms Exposed 45-mil EPDM Installed April 2008

Valicoff Farms Exposed 45-mil EPDM Installed May 2007

Prefabricated Bituminous Geomembranes

Ochoco Irrigation District Exposed 160-mil Bituminous Geomembrane Installed November 2000

Ochoco Irrigation District Exposed 160-mil Bituminous Geomembrane 1½ years old

Ochoco Irrigation District Exposed 160-mil Bituminous Geomembrane 11 years old

Juniper Flat Irrigation District Exposed 160-mil Bituminous Geomembrane Installed October 1997

Juniper Flat Irrigation District Exposed 160-mil Bituminous Geomembrane 4 years old

Polyethylene Composites with Shotcrete Cover

Arnold Irrigation District Polyethylene Geocomposite with 3 inch Shotcrete cover Installed February 1992

Arnold Irrigation District Polyethylene Geocomposite with 3 inch Shotcrete cover 19 years old

Quincy-Columbia Basin Irrigation District Polyethylene Geocomposite with 3 inch Shotcrete cover Installed 2010

Columbia Basin Irrigation District Polyethylene Geocomposite with 3 inch Shotcrete cover Installed Feb. 2004

Composites with Earth Cover

Quincy-Columbia Basin Irrigation District Polyethylene Geocomposite with Earth cover Installed Nov. 2005

Quincy-Columbia Basin Irrigation District Polyethylene Geocomposite with Earth cover 5 years old

Quincy-Columbia Basin Irrigation District Polyethylene Geocomposite with Earth cover Installed 2004

Quincy-Columbia Basin Irrigation District Polyethylene Geocomposite with Earth cover Installed Feb. 2004

Quincy-Columbia Basin Irrigation District Polyethylene Geocomposite with Earth cover 7 years old (2004)

Blackfeet Indian Tribes Polyethylene Geocomposite with Earth cover Installed Oct. 2009

Composites Exposed 8oz nonwoven-geotextile top and bottom with Polyethylene center or 12oz nonwoven geotextile top and bottom with Polyethylene center

Bitter Root Irrigation District Polyethylene Geocomposite Installed October 2001

Bitter Root Irrigation District Polyethylene Geocomposite 1 year old

New Sweden Irrigation District Polyethylene Geocomposite Installed 2006

New Sweden Irrigation District Polyethylene Geocomposite Installed 2007

Cost Construction cost (2002 dollars): Exposed Geomembranes $0.78 - $1.53 sq ft Concrete alone $1.92 - $2.33 sq ft Geomembranes with Concrete Cover $2.43 - $2.54 sq ft Spray or Wet applied membranes $1.40 - $4.33 sq ft

How are they performing? Seepage Reduction Initial 90 to 99 percent 5 years 80 to 95 percent 10 years 70 to 95 percent Maintenance Very little through 10 years Exposed Membranes - Subject to mechanical damage Concrete - Minor repairs Durability Concrete 40-60 years Exposed Geomembranes 20-40 years Spray or wet applied Geomembranes over Steel Flume 10-20 years over Rocky Subgrades < 1-5 years over Concrete lined ditch?

Benefit-Cost Analysis Lining Fluid or Wet applied Membranes Construction Cost ($/square ft) Durability (years) Maintenance Cost ($/square ft-yr) Eff. At Seepage Reduction (%) B/C Ratio $1.13 $4.33 10 20 $0.010 90 0.2 1.8 Concrete $1.92 - $2.33 40 60 $0.005 70 3.0 3.2 Exposed Geomembranes Geomembranes With Concrete Cover $1.03 - $1.53 20 40 $0.010 90 3.0 3.9 $2.43 - $2.54 40 60 $0.005 95 3.5 3.7

Construction: Exposed Geomembrane Canal Velocities Side Slope Friction Items to Think About Geomembranes with Concrete Cover Concrete Thickness Damage to Geomembrane (when dragging shotcrete hose over the lining)