ɪɾ ɪz fˈɔːɹmd baɪ kˈænɪən dˈæm ɔnðə nˈɔːɹθ fˈɔːɹk ʌvðə fˈɛðɚ ɹˈɪvɚ, æz wˈɛl æz bˈɛnɚ ænd lˈæst tʃˈæns kɹˈiːks, hˈæməltən bɹˈæntʃ, ænd vˈɛɹiəs nˈætʃɚɹəl spɹˈɪŋz.
It is formed by Canyon Dam on the North Fork of the Feather River, as well as Benner and Last Chance Creeks, Hamilton Branch, and various natural springs.