The BIA release described a major change in federal administration of roughly 25,000 acres. Its explanation was more precise than the language of restoration in its headline.
The December 1978 opinion read the agreement as a conditional exchange whose terms had not been fulfilled. It rejected both earlier title opinions and the claim that the 1904 reclamation program completed the bargain.
A lengthy reconsideration reaffirmed the Margold position and explained why Interior believed the disputed non-irrigable lands had been ceded. Its reasoning became the immediate target of the 1978 reversal.
Requests for compensation and protection along the All-American Canal prompted an Interior opinion that denied tribal title to disputed non-irrigable lands. Interior would reverse that interpretation four decades later.
Congress brought irrigable reservation lands into a federal reclamation framework. Decades later, officials disputed whether that development fulfilled the earlier cession agreement.
President McKinley's order addressed the former military property south of the Colorado River. Its narrow wording matters when tracing later references to the reservation boundary.
The 1894 statute joined approval of the agreement to directions on allotments, land sales, irrigation, and presidential action. Those provisions became central to the later dispute over performance.
Reports, correspondence, proposed legislation, and maps show the expectations—and unresolved engineering questions—that accompanied the agreement sent to Congress.
