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1Published 1903Subjects: “...Bridges Pennsylvania....”
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2Published 1903Subjects: “...Pennsylvania Railroad....”
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3Published 1934“...Bridges across Monongahela, Allegheny, and Youghiogheny rivers in Allegheny County, Pennsylvania...”
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4Published 1946“...Bridge across Allegheny River near Warren, Pennsylvania...”
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5Published 1919“...Bridge across Allegheny River near Millvale, Pennsylvania...”
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6Published 1921“...Bridge across Allegheny River at Oil City, Pennsylvania...”
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7Published 1920“...Extending time for bridge across Allegheny River at Pittsburgh, Pennsylvania...”
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8Published 1920“...Extending time for bridge across Allegheny River near Millvale, Pennsylvania...”
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9Published 1916“...Bridge across Allegheny River, Warren County, Pennsylvania...”
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10Published 1917“...Bridge across Allegheny River at Warren, Pennsylvania...”
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11Published 1917“...Bridge across Allegheny River in Glade and Kinzua townships, Pennsylvania...”
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12Published 1929“...Sewer outlet in Allegheny River at Pittsburgh, Pennsylvania...”
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13Published 1927“...Bridge across Allegheny River at Oil City, Pennsylvania...”
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14Published 1939“...Bridge across Allegheny River between Valley Camp, Pennsylvania, and East Deer Township...”
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15Published 1926“...Bridge across Allegheny River near Warren, Pennsylvania...”
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16Published 1935“...Bridge across Allegheny River near Port Allegany, Pennsylvania...”
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17Published 1935“...Bridge across Allegheny River near Ford City, Pennsylvania...”
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18Published 1935“...Bridge across Allegheny River near Emlenton, Pennsylvania...”
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19Published 1935“...Bridge across Allegheny River near Tionesta, Pennsylvania...”
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20Published 1935“...Bridge across Allegheny River near East Brady, Pennsylvania...”
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