LauraR8 you may have learned about this by now. but FYI: Internal canner pressures (and therefore temperatures) are lower at higher altitudes. Canners must be operated at increased pressures as the altitude increases. Check reliable canning instructions for altitude adjustments. I fish at sea level and thus don't really deal with elevation, but I live in Jackson Hole WY so if I were to can trout there, I would HAVE to increase the pressure. I love canning!!!