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<p>I witnessed those MSE walls go up in Pennsylvania some years ago and I believe they were the first of thier kind for that work. Last time I pass various locations where they were used before 9-11 they were still in place.</p><p>I was looking at the three bridges in the photo.. dont they need to shave away the left side a bit more and level out and make room for that third track instead of trying to realign the other two tracks?</p>
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