70 Ranch Reservoir

70 Ranch Raw Water Reservoir: A Geosynthetic Liner System for a Difficult Site 

EPI provided the largest prefabricated scrim-reinforced polypropylene (fPP-R) geomembrane for a water reservoir in North America that was recently completed in Colorado. The Ranch Reservoir, located near Kersey and the South Platte River, is one of the most nostable synthetically lined raw water reservoirs in the state. Over three million cubic yards of dirt were removed during the process. Fabrication was completed by EPI in January of 2018, with full project completion in 2019. The reservoir allows for storage of water for distribution to agricultural, industrial and municipal uses.


170+ acres (5,500 acre feet of water, or 1.8 billion gallons)

Panel Size

  • 45 RPP for the slopes
  • 125 panels at 30 custom sizes, with a total fabricated square foot of 2,010,528
  • 30 RPP for the floor
  • 177 panels, all at the same size, with a total fabricated square foot of 5,522,400 

Total square feet of fabricated material

7,532,928 SF

Technical Considerations

  • Variable porosity and quality of bedrock
  • Limited site soils that could hold water
  • Site weather (high winds & rain, high surface temperatures)
  • Irregular shape

Read more about the Raw Water Ranch Reservoir grand opening here.

Check out this Geosynthetics article about the specifics of the project here.

Explore our other Case Studies & Applications to learn more about our custom geomembrane solutions. 

For more information, call 800-OK-LINER today!

To request one of our free Product Sample Books, please email your name, phone number, and address to sales@geomembrane.com.