![Interstate 99](http://upload.wikimedia.org/wikipedia/commons/thumb/7/74/I99SkyTop.jpg/300px-I99SkyTop.jpg)
Interstate 99 excavation in 2002, looking south from Julian toward Port Matilda on Bald Eagle Mountain, where acidic rock was exposed. U.S. Route 322/220 (Skytop Mountain Road), runs below the I-99 alignment. Eagle Field private airport is at the upper left.
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