Mystery theme II by KlionskyG

Question 2

1. What town approximately doubles in population when you include the students at the University of Maine, whose flagship campus has been located there since the 1860s? It's also the name of a smaller city in Hennepin County because the founder was from the town in Maine.

2. What is the name of the tallest dam in the United States? It's on the Feather River, 66 miles due north of the California state capitol building (see image):

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ORO - Orono; Oroville Dam