OB since 1972.

check out the California Coastline Website to see photos of the coast from 1972 to 2009. You can see the coastal armoring that has been added to the coast over time.

Here is a link to the coastline south of Sloat at OB:

http://www.californiacoastline.org/cgi-bin/timecompare.cgi?image=200505900&flags=0&year=2005&latdeg=37.734667&longdeg=122.512000

Click on the dates to see old photos of OB --

OB at Sloat in 1972.

OB at Sloat in 1987.

OB at Sloat in 2009.

ALSO, checkout ROCK armoring in Santa Cruz and in Pacifica.

this website is amazing.