In Northern Pacific Railway Company v. Wass, the U.S. Supreme Court ruled in favor of the railway company, overturning a lower court's decision that had favored Wass. The case revolved around land rights and whether or not certain lands were part of public domain available for homesteading under federal law or if they belonged to the Northern Pacific Railway Company as granted by Congress through an 1864 Act. The disputed lands fell within indemnity limits - areas where railroads could select replacement land if their original grants were found to be unavailable due to prior settlement claims or other reasons. However, at issue was whether these lands became part of public domain when they weren't needed for this purpose before being claimed by Mr.Wass. The Supreme Court held that such lands did not automatically become part of public domain just because they weren't immediately required as replacements; instead, until officially restored to public domain by government action, these remained potentially available for railroad selection under its grant from Congress.The ruling thus clarified how indemnity provisions worked in relation with federal land grants made to railroads during westward expansion era.

The dissenting opinion in the case of Northern Pacific Railway Company v. Wass argued that the majority's decision was too broad and did not properly consider the specific circumstances of this case. The dissent believed that there was a valid contract between Mr. Wass and the railway company, which should have been upheld by law despite any potential irregularities or inconsistencies within it. They also disagreed with how much weight was given to certain pieces of evidence over others, arguing for a more balanced approach to evaluating all available information before making a judgment on such an important issue as property rights. Furthermore, they felt that some aspects of common law were overlooked or misinterpreted by the majority, leading them to reach an incorrect conclusion about who rightfully owned land adjacent to railroad tracks in Montana.