This concrete parking strip on Haight Street near Masonic Ave was installed in 1968. As part of the new improvement plan the section with this graffiti was removed and tomorrow it will likely be demolished.
To take a few last pictures that show it off today, I outlined the words in chalk:

The Haight is now down to 5 things that we know the date of, were created in the 1960s, and are visible to the public. (one of which is in front of Hunter S. Thompson’s old place up on Parnassus near UCSF where it still says “FUCK NIXON” in the concrete)

I know of another LSD graffiti in the concrete in front of 1237 Masonic that I will be seeking to learn the date of.