They all are. Each separate line refers to a different reach of the Boise River. We currently stock the Boise River from Barber Dam area to Star Rd. We are in the slow process of trying to fix this database glitch by adding a reach descriptor.
The only way you can tell the difference currently is to look for fall adult steelhead plants, if you see them, then you have selected the Boise River reach that provides data for stocking locations within the city of Boise and downstream to Garden City.