1. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Dam Repair A Case Study of the Girotte Dam in France By Murphy Mahaffey Director International Sales WIWA Wilhelm Wagner GmbH & Co. KG

2. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Overview History of the Girotte Dam Design Project Requirements Application Performance to Date Contributors to the Project

3. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November History of the Girotte Dam Located in the Rhone-Alpes Region near Hauteluce Girotte Lake producing electricity since 1903 Built from 1942-1949 First Sub-Glacial inlet structure in the world

4. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Construction of Girotte Dam

5. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Girotte Dam Design Multiple Arch and Buttress Design –18 Arches held by Fixed Buttresses Unreinforced Concrete –Due to Shortage of Steel 45 m / 148 Feet Tall 510 m / 1,675 feet long Spans a mountain ridge –1,747m /5,732 feet elevation

6. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Girotte Dam Design Reservoir Surface Area is 75 ha / 8.7 million square feet

7. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Girotte Dam Conditions Difficult Weather Conditions –Cycling Temperatures and Elevation are demanding on a Concrete Structure, morning temperatures on job were 10C / 50F –Aggressive Glacial Waters from Tré-la-Tête Glacier –Wind Erosion Elevation 1,747m / 5,732 feet Aggressive Glacial Water Multiple Coatings over time- paint, resin, etc.

8. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Girotte Condition Report 2006 Condition Report in March 2006 -Cracks observed in wall -Escapes at some membranes (leaks)

9. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Material Specification and Budgeting Polyurea offered these advantages over other competing systems: Fast setting Sprayable High-Build Ease of Application Exceptional Life

10. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Safety Considerations Difficult Access Harness Work Changing Weather Conditions –Temperature, Wind Elevation Communication with Sprayer Environmentally Sensitive Area Equipment Operation Material Handling

11. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application Visual Inspection –Individual drops by rope and harness over all 18 arches and buttress –Top of Dam to Base –Safety is a Priority

12. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application Identify and Mark Cracks Grind Cracks Down

13. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application Apply 2-Component Epoxy Primer

14. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application Equipment Requirements 110 Bar / 1,600 psi spray pressure 70C / 160F material temperature

15. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application Equipment Requirements Full access to Wall Base 45m Heated Hose High Delta T Heaters Impingement Mixing Spray Gun

16. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application Equipment Safety Requirements Over Pressure Shutdown Over Temperature Shutdown Ratio Monitoring

17. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Application

18. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Job Details 1,200 Kilos / 2,645 lbs. of Polyurea Sprayed –110Bar / 1,600 psi; 70C / 160F Applied over 5 Days –Changing Weather Conditions

19. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Performance to Date System Performing Within Specification

20. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Polyurea Dam Repair Success

21. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Contributing Companies SPIE Batignolles- Application BMS- Equipment Supplier Tradecc- Polyurea Material WIWA- Equipment Design and Technical Support WIWA France- Laksander Michel

22. PDA Europe 2010 Annual Conference – It’s Time to… Polyurea – Sitges, 15-17 November Thank You! Polyurea Dam Repair A Case Study of the Girotte Dam in France By Murphy Mahaffey Director International Sales WIWA Wilhelm Wagner GmbH & Co. KG