Welcome to the forum, Steven.

Liners work and are guaranteed for 20+ years, but are typically the most expensive option. High plasticity clay compacted in 4-6" lifts and use of sealing polymers also aid creating seals to impound water. I'm a volunteer here and my time is free to our forum family, feel free to reach out anytime for a chat. Happy to help however I can.

tj@hudlandmgmt.com