It could be five years before a project to fill a brine well in Carlsbad is complete.
Scientists warn the brine well could collapse at any time, taking roads, a school and homes with it.
In this year’s legislative session, the governor signed a bill which pays to fill it in.
They say construction is expected to be complete in 2021.
However, they will monitor the site for an additional 700 more days hoping to wrap up the entire project by 2023.