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gptkb:North_Pennsylvania_Railroad
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1850s
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gptkb:Skagway_Gold_Rush
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Construction of the White Pass railroad
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gptkb:St._Paul_and_Pacific_Railroad
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used local resources
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gptkb:West_Chester_and_Philadelphia_Railroad_Company
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Completed in 1869
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gptkb:Northern_Pacific_Railway_Company
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Built through challenging terrains
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gptkb:Colorado_Springs_and_Cripple_Creek_District_Railway_Company
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Involved local labor and materials
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gptkb:New_York_and_Wilmington_Railroad
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built in 1830s
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gptkb:Portsmouth_and_Concord_Railroad
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Completed in 1840
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gptkb:Chicago,_Indianapolis_and_Louisville_Railway
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Completed in stages
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gptkb:South_Carolina_&_Georgia_Railroad
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significant engineering projects
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