Glass is a difficult material to recycle, or at least, an unpopular material to recycle. This, ironically, despite the fact that glass can be reformed into glass many times without losing quality.
Momentum Glass is in Salt Lake City, and takes mixed glass to form raw materials for a range of products. Their products go back into local manufacturing in the form of containers, fibreglass and water filtration.
Other applications for ground glass include replacing sand or garnet in blasting applications, forming reflective line marking on roads, and even as a fine powder to assist in brick manufacture.
Momentum Recycling: http://www.momentumrecycling.com/