Why It Matters
A federal appeals court ruling has clarified that Montana state streambed protection laws do not apply to private property within Glacier National Park boundaries. The decision resolves a dispute over construction near McDonald Creek and establishes the limits of state regulatory authority over federally managed parkland.
The case centered on a partially completed three-story home in the Flathead Valley, where local conservation officials had ordered demolition based on state law. The ruling affects how environmental regulations are enforced on private inholdings within national parks.
What Happened
John and Stacey Ambler, a California couple, purchased half an acre along McDonald Creek near Apgar Village in 2019. After consulting with the National Park Service and Flathead County, they were told no permits were required for construction and proceeded to build a home on the property.
By 2023, the three-story structure prompted complaints to the Flathead Conservation District. District staff determined the building violated Montana’s stream protection laws, known as the 310 Law, due to its proximity to the water’s edge. The district ordered the home demolished and the riverbank restored.
The Amblers sued in late 2023, arguing the conservation district lacked authority over their property. A federal judge ruled in their favor, and the U.S. Court of Appeals for the Ninth Circuit affirmed that decision last month.
By the Numbers
The property sits on half an acre purchased in 2019. Glacier National Park was established in 1910, but private parcels remain within its boundaries, particularly near Lake McDonald. Montana ceded jurisdiction over park lands to the federal government in 1911. The state Streambed Act was enacted in 1975, more than 60 years after the jurisdictional transfer.
The Legal Reasoning
The three-judge panel concluded that Montana surrendered legislative authority over private land within Glacier Park boundaries when it ceded jurisdiction in 1911. The federal government accepted that transfer in 1914, making federal authority the sole governing power over these properties.
The court ruled that only state laws in effect before 1911 can be enforced within park boundaries. Because Montana’s stream protection regulations were enacted in 1975, they do not apply to the Amblers’ property.
The judges wrote that federal authority became the only authority operating within the ceded area, including privately owned lands within park boundaries, except where Montana specifically reserved powers during the original transfer.
What’s Next
The Flathead Conservation District’s board stated it respects the court’s decision and appreciates the legal clarification provided by the case. The home, visible from Camas Road, remains partially constructed. The ruling allows the Amblers to complete construction without state streambed permits.