Usually the bags that started in anc for den on flt 100 are loaded in separate pits, or they will be loaded in the same pits with the pdx bags or cargo. If they have to load den bags with pdx bags they will load the den bags first then the pdx bags in the pit that way it’s easier for the ramp people to off load the plane... The only time that they will take off den bound cargo or bags is for weight and balance to move the bags, or cargo to a diffrent pit, or due to a plane swap in pdx..