Reno to Wadsworth, Nevada, where they bridged the Truckee for the last time. From there, they struggled across a forty mile desert to the end of the Humboldt river at the Humboldt Sink. From the end of the Humboldt, they continued east over the Great Basin Desert bordering the Humboldt River to Wells, Nevada. One of the most troublesome problems found on this route along the Humboldt was at Palisade Canyon (near Carlin, Nevada), where for the line had to be built between the river and basalt cliffs. From Wells, Nevada to Promontory Summit, the Railroad left the Humboldt and proceeded across the Nevada and Utah desert. Water for the steam locomotives was provided by wells, springs, or pipelines to nearby water sources. Water was often pumped into the water tanks with windmills. Train fuel and water cranes for the early trains with steam locomotives may have been as often as every . On one memorable occasion, not far from Promontory, the Central Pacific crews organized an army of workers and five train loads of construction material, and laid of track on a prepared rail bed in one day—-a record that still stands today. The Central Pacific and Union Pacific raced to get as much track laid as possible, and the Central Pacific laid about of track from Reno to Promontory Summit in the one year before the Last Spike was driven on May 10, 1869. Central Pacific had 1,694 freight cars available by May 1869, with more under construction in their Sacramento yard. Major repairs and maintenance on the Central Pacific rolling stock was done in their Sacramento maintenance yard. Near the end of 1869, Central Pacific had 162 locomotives, of which 2 had two drivers (drive wheels), 110 had four drivers, and 50 had six drivers. The steam locomotives had been purchased in the eastern states and shipped to California by sea. Thirty-six additional locomotives were built and coming west, and twenty-eight more were under construction. There was a shortage of passenger cars and more had to be ordered. The first Central Pacific sleeper, the "Silver Palace Sleeping Car", arrived at Sacramento on June 8, 1868. The CPRR route passed through Newcastle and Truckee in California, Reno, Wadsworth, Winnemucca, Battle Mountain, Elko and Wells in Nevada (with many more fuel and water stops), before connecting with the Union Pacific line at Promontory Summit in the Utah Territory. When