Preheat your oven to 350°F/180°C.
In a large bowl, whisk together the sugars, eggs, oil, water, and the mashed sweet potato.
In a separate bowl, combine the dry ingredients (flour, baking soda, salt, cinnamon, and nutmeg).
Add the dry ingredients to the wet ingredients, mix until there are no dry patches of flour but do not over mix (this is very important).
Fold in the chopped pecans.
Pour batter into a greased 8.5 x 4.5-inch loaf pan and bake for 50-60 minutes or until a toothpick inserted into the center of the bread comes out clean.
Allow the sweet potato bread to cool completely on a rack before removing from the pan and serving.