Complex sentence: Initially, the CMBC began brewing 12 gallons at a time, but gradually expanded, reaching about 1,500 barrels as of 2013, with a full-time staff of 10 people.
Split into simpler sentences: Initially, the CMBC began brewing 12 gallons at a time, but gradually expanded. By 2013, the number increased to about 1,500 barrels, with a full-time staff of 10 people.