Not all meat packing and processing occurred across the river in National City; Hyde Park was known as a packing district well into the 1970’s, when Krey’s closed in 1978.
The building has really fallen on hard times; it is now some sort of scrapping company. Still, interesting glazed terracotta elements still show off their faded luster.
This crumbling wood structure seems to have been an air conditioning or refrigeration unit.
Much of the building is in very bad shape, with crumbling walls and plants growing out of the roof.
I suspect the twin smokestacks were once much taller, but were truncated at some point due to deterioration.
You can read the obituary of the last president here.