This is a beach in Malibu. It is one of the most expensive places on the planet: the smallest bungalow is a multimillion dollar property.
The sea is eating the land away. The sand is public but the owners are protecting their properties by shovelling up public sand and putting it in plastic bags to protect their private properties. The workers who do this are generally Mexican and often illegal. Some of them wear uniforms to give the appearance of legitimacy but they are not allowed to be in the US. They are badly paid and wary of photographers.
Two weeks after this photo was taken, a heavy storm hit the coast and some of the bags were washed back into the pacific ocean.
(Please click the picture for a larger image.)