Environment impact study, 1975 |
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| When engineers built the Boulder Dam and the New Jersey Turnpike, they worried about cost and delay, and little else. By 1975, new laws required Metro engineers to consider ecological (squares), socio-economic (circles), and visual-physical (triangles) impacts as well. , Wallace McHarg Roberts and Todd, Environmental Impact Study, Metro J & H Route to Springfield and Franconia, 1975. WMATA Specifications Collection, box 4, folder 9, GWU. |
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