Source R At Promontory Summit in Utah Territory, the final spike was driven into the rail on May 10, joining the Central Pacific and Union Pacific lines and...

This question asks you to evaluate the usefulness of a source for understanding the impact of the transcontinental railroad on the United States. You need to assess both what the source contributes and what it cannot tell us.

What the source tells us: The newspaper article accurately describes the completion of the transcontinental railroad at Promontory Summit, Utah, on May 10, 1869, connecting the Central Pacific (building eastward from Sacramento) and Union Pacific (building westward from Omaha) lines. The claim that travel time from New York to San Francisco was reduced from months to less than a week is historically accurate. The predictions about cheaper goods flowing westward and agricultural products reaching eastern markets reflected genuine expectations.

Own knowledge that confirms and extends the source: The railroad did transform American commerce and settlement as predicted. It facilitated the movement of goods between East and West, encouraged settlement of the Great Plains, and helped establish new towns along the route. The railroad era contributed to the rapid economic growth of the late nineteenth century.

Limitations of the source: Written at the exact moment of completion, the article is celebratory and forward-looking, focusing only on positive predictions. It cannot describe consequences that had not yet occurred. Several significant negative impacts are entirely absent. The railroad contributed to the displacement of Native American nations from their traditional lands and the destruction of the buffalo herds that sustained Plains peoples. The source does not mention the dangerous working conditions endured by Chinese labourers who built much of the Central Pacific line through the Sierra Nevada mountains. It also omits the financial corruption involved in railroad construction, particularly the Credit Mobilier scandal, in which railroad insiders defrauded the government of millions of dollars.

Reaching the highest level (5-6 marks): A Level 3 answer evaluates usefulness by considering the source's content, its timing (written at the moment of the event, before consequences could be known), and its nature as a newspaper article (designed to celebrate a national achievement). The source is useful for understanding the optimism and expectations surrounding the railroad but does not capture its full impact, both positive and negative. The best answers identify what the source can and cannot tell us, rather than simply calling it "useful" or "not useful."