Re: [birdingSanDiego] [SanDiegoRegionBirding] Lindo Lakes construction project.
FYI: Bentonite is an extremely dense fine particle clay that is often used to create a lining in ponds, lakes, reservoirs to prevent water loss through percolation into the groundwater… so not concrete…
CK Staurovsky
El Cajon
Source: SanDiegoRegionBirding Latest Reports