In Cincinnati, local groups (including unions and the Baptist Ministers' Conference) are pushing for a living wage requirement, higher minority hiring goals, and local hiring requirements for the city's $1 billion school district wide construction project. See here. Although about half of the construction has been finished, community members would still like to see these issues addressed in future procurements, possibly in the form of a CBA.
Supporters of the restrictions claim that it will result in higher quality construction and benefits to the local community, but critics claim that it will cost an extra $15 to $20 million--enough by itself to build a new school. The school board will vote on the issue in August.