Small Businesses thrive here! Atlantic Plaza is a neighborhood shopping center constructed by Sierra Pacific Properties Inc. in 1980 and consists of 143,000 square feet. This shopping center is located at Railroad Avenue and Harbor Street in Pittsburg. Major tenants include Foods Co., CVS Pharmacy and Goodwill. Small businesses work hand in hand with large anchor stores to drive the traffic to this shopping center. You surely will be able to find all of your common needs here and simultaneously support your local retailers!