In United States v. Alpine Land & Reservoir Co., 878 F.2d 1217, 1219 (9th Cir.1989), the Court found that the Engineer could, under the decree, "consider the Tribe's objection that the applications should be rejected due to alleged forfeiture or abandonment," Alpine II, 878 F.2d at 1225. The Court found that it was error for the district court to conclude that Nevada law is wholly irrelevant and that it is inappropriate for the Engineer to adjudicate the issues of perfection, forfeiture or abandonment, and we remanded to the district court with instructions to evaluate the Engineer's ruling on the applicability of Nevada's statutory forfeiture provisions and lack of intent to abandon. Id. at 1229. In Alpine, the Court considered the Tribe's claims of lack of perfection, abandonment, and forfeiture in the context of a single issue: whether the district court erred by failing to address these claims. We held that such failure was indeed error. Id. at 1227-28.