found a quote from the guy who started the company
this must be what the tour guide was referring to
PETALUMA, CA - The Lagunitas Brewing Company of Petaluma CA is moving forward with the construction of a second brewing facility in the crossroads of the US; Chicago Illinois. Carl Sandburgs City of Big Shoulders will be home to a new ROLEC-built 250 barrel kettle and 200,000 barrels of initial capacity. The brewery will be operating by the 4th quarter of 2013, and will occupy 150,420 square feet on the grounds of the CineSpace Movie Soundstage complex at 15th Street and Rockwell in Chicagos Douglas Park neighborhood.
According to Lagunitas founder and CEO, Tony Magee, the idea got very real in the last 2 months. A few days spent with a calculator and a couple more visiting sites around the city crystalized the plan. I was born and raised in Chicago so the siting questions were easy to figure out. But the real driver behind it all was two-fold; first, I realized that there was about 4 ounces of diesel in every 22oz bottle of our beer when enjoyed in Chicago, even more if youre in NYC. Secondly, the future of Craft Beer is, we believe, local and we sure want to be a part of the future so the decision was easy. One of the best things about craft brewing is being close to the people who are digging it.