Steve Hannaford farms in western Nebraska. The farm has passed to succeeding generations of Hannafords, who use water from the North Platte River for irrigation purposes. The headlands of the North Platte are in Colorado, but use of the water from the North Platte by Nebraskans preceded use of the water by settlers in Colorado. What theory of water rights governs Nebraska and Colorado residents? Can the state of Colorado divert and use water in such a way that less of it reaches western Nebraska and the Hannaford farm? Why or why not?

Jamie Stoner decides to put solar panels on the south face of his roof. Jamie lives on a block of one- and two-bedroom bungalows in South Miami, Florida. In 2009, someone purchases the house next door and within two years decides to add a second and third story. This proposed addition will significantly decrease the utility of Jamie’s solar array. Does Jamie have any rights that would limit what his new neighbors can do on their own land?