Humphreys Basin Location 0 Humphreys Basin Location 2 Humphreys Basin Location 12 Humphreys Basin Location 4 Humphreys Basin Location 5 Humphreys Basin Location 6 Humphreys Basin Location 7 Humphreys Basin Location 11 Humphreys Basin Location 10 Humphreys Basin Location 9 Humphreys Basin Location 3 Humphreys Basin Location 16 Humphreys Basin Location 18