I found a period drawing of the Brockliss Bridge that the Pony Express used in 1860-61. The Express was charged 1 cent per month toll to cross. The bridge was heavily used from 1855 until it collapsed in1869, at times wagons were backed up for miles waiting to cross the narrow bridge. We delivered the mail to the north side of the American River, which would be the far side in the drawing. JW