Ppl Montana, LLC v. Montana
The Supreme Court unanimously ruled that Montana's courts used the wrong legal test to decide the State owned the riverbeds under PPL Montana's dams, including a stretch with a chain of waterfalls that boats have never been able to cross.
The Court held that riverbed ownership must be assessed segment by segment, that a river segment requiring an overland detour is generally not navigable for title purposes, and that today's recreational boating on the Madison River does not by itself prove the river was navigable back in 1889. The case goes back to Montana's courts to reconsider the remaining disputed stretches.
“Even if portage were to take travelers only one day, its significance is the same: it demonstrates the need to bypass the river segment, all because that part of the river is nonnavigable.”
Explains why needing to carry boats overland shows a river stretch is not navigable for title purposes.
How it got here: A Montana trial court granted the State summary judgment on navigability and ordered PPL to pay $41 million in rent; the Montana Supreme Court affirmed, and PPL sought review.
The Case in Depth
What happened
PPL Montana operates hydroelectric dams built decades ago on riverbeds under the Missouri, Madison, and Clark Fork Rivers, including on Montana's Great Falls. Montana had never sought rent for use of these riverbeds until a 2003 lawsuit prompted the State to claim ownership under the equal-footing doctrine, which gives states title to beds under waters that were navigable when they joined the Union. Montana then demanded back rent from PPL.
The question before the Court
Could Montana charge a hydroelectric power company rent for riverbeds under stretches of rivers—including a 17-mile run of waterfalls—that boats could never actually travel through at statehood?
Why it matters
Power companies and other riverbed users nationwide gain a clearer, more protective legal test for when a state can claim their land and charge back rent. Montana's $41 million rent award is now in doubt for the Great Falls stretch, and other states face tighter limits before they can assert similar ownership claims over riverbeds beneath dams, bridges, or pipelines.
What changes now
The Montana Supreme Court's judgment is reversed, and the case returns to Montana's courts to reconsider, under the corrected legal standards, whether the remaining disputed river stretches (including on the Clark Fork and other parts of the Missouri) were navigable at statehood. The Great Falls stretch has already been decided to be nonnavigable, likely reducing the rent Montana can collect. The Court did not resolve who bears the burden of proving navigability, leaving that question for another day.
What this does not decide
The Court did not decide whether the Montana Supreme Court also erred about which side bears the burden of proving navigability, and it did not rule on the navigability of every disputed river stretch — those questions go back to Montana's courts to reapply the corrected standard.
How the Court got there
The legal reasoning, step by step
- The Court applied the equal-footing doctrine, under which a new state automatically receives ownership of riverbeds beneath waters that were 'navigable in fact' — usable as highways for trade and travel — at the moment the state joined the Union.
- Following its own precedent, the Court explained that navigability for title purposes must be assessed one river segment at a time, because physical conditions like rapids, waterfalls, and canyons can make one stretch of a river navigable while a neighboring stretch is not.
- The Court held that when travelers had to leave the water and haul their boats and supplies overland to get around a stretch of river — a portage — that stretch is generally not navigable, because true highways for water commerce do not require leaving the water.
- Applying that rule to the 17-mile Great Falls stretch, which boats have never been able to cross, the Court concluded that segment was not navigable at statehood, so Montana cannot claim title to the riverbed there.
- The Court also held that Montana Supreme Court's reliance on modern recreational boating on the Madison River was legally flawed, because present-day use only shows a river was navigable at statehood if the boats are similar to those used commercially in 1889 and the river's physical condition has not since changed in ways that make it easier to navigate.
Doctrinal impact
Cases affected by this decision
Reaffirms United States v. Utah (283 U. S. 64)
Reaffirmed that riverbed navigability for title must be assessed segment by segment, not for the whole river.
Distinguishes The Montello (20 Wall. 430)
Held that its portage analysis for interstate-commerce regulation does not control riverbed title disputes.