NEW YORK (Standard&Poor's) May 13, 2014--Standard&Poor's Ratings Services said today that its ratings on Boulder, Colo.-based Zayo Group LLC, including the 'B' corporate credit rating, and the stable outlook remain unchanged following the company's proposed $275 million add-on to its term loan facility due 2019. The proposal will increase the size of the facility to $2.05 billion from $1.77 billion (though approximately $30 million of the facility has been repaid as of March 31, 2014). The issue-level rating on the senior secured debt remains 'B' with a '4' recovery rating. The '4' recovery rating indicates expectations for average (30%-50%) recovery of principal in the event of default. (For the complete recovery analysis, see our recovery report