Columbia University's School of Social Work has adopted an open access policy.
Here's an excerpt from the announcement:
Columbia University Libraries/Information Services' Center for Digital Research and Scholarship (CDRS) is pleased to announce that the School of Social Work at Columbia University has implemented an open access resolution, in which all faculty and staff have resolved that they commit to making their scholarly works accessible to the public. The policy went into immediate effect after Social Work faculty voted unanimously in favor of the resolution at their faculty meeting on December 2, 2013. . . .
The implementation of the School of Social Work open access resolution comes after the recent adoption of an open access resolution at Columbia's Mailman School of Public Health in May 2013, which was the first school at the university to make scholarly research available to the public and free online. The Lamont-Doherty Earth Observatory became the first program at Columbia to adopt an open access resolution in January 2011, which was followed by Columbia University Libraries/Information Services' adoption of a policy in June 2011.