This is largely necessary in San Diego County because a major source of sand replenishment has been suppressed: natural erosion of the soft sand bluffs that back the beaches. At the top of every accessible bluff there is a phalanx of small palaces, maintained -- though often left unoccupied -- by an ever-growing class of billionaires, and now protected from nature by steel-reinforced concrete seawalls built upon nominally public property below.

The dredging projects are of course not paid for by the private owners whose seawalls necessitate them, but by the public.

The walls themselves, while nearly invisible to palace occupants, present as egregious eyesores to the ordinary citizen trying to enjoy what remains of the beachfront below:

https://duckduckgo.com/?q=solana+beach++seawall&t=ipad&iar=i...