How many rivers are in Nebraska?

# Arikaree River # Big Blue River # Big Nemaha River # Calamus River # Cedar River # Elkhorn River # Keya Paha River # Little Blue River # Little Nemaha River # Loup River # Middle Loup River # Missouri River # Niobrara River # Nishnabotna River # North Fork Elkhorn River # North Loup River # North Platte River # Platte River # Republican River # Snake River # South Fork Elkhorn River # South Loup River # South Platte River # West Fork Big Blue River # White River # Wood River