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| In 1900 the population of Idaho was 162,000. By 1907 it had grown by 111, 269 to a total of 273,269. This map is Canyon County in 1907. That year the county population was 18,000. Canyon County covered 1,327 square miles. The county seat was Caldwell. |
| The red numbers denote the railroads at the time. They were: |
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| The line between New Plymouth and Emmett was projected. |