Question

What did the Central Pacific need that the Union Pacific didn't?

Answer 1

Answer:

The Pacific Railroad Act stipulated that the Central Pacific Railroad Company would start building in Sacramento and continue east across the Sierra Nevada, while a second company, the Union Pacific Railroad, would build westward from the Missouri River, near the Iowa-Nebraska border

Explanation:

Answer 2

The Central Pacific and Union Pacific Railroads ... had barely enough wood to make railroad ties, 2300 of which were needed to finish each mile of track.