Rise Gold Corp. Advances in Idaho-Maryland Mine Vesting Rights Case

Strategic Insights -

Rise Gold Corp., a Canadian mining company, is making progress in its legal battle to unlock the value of its Idaho-Maryland Mine in Nevada County, California. The mine operated from 1862 to 1957 and produced an estimated 2.4 million ounces of gold. The company has been asserting its constitutionally-protected vested right to mine at the site without a use permit, but the County has rejected this claim, citing the lack of evidence showing the company's intent to resume mining. However, the Supreme Court of California has ruled in a similar case that cessation of use alone does not constitute abandonment of a vested right. Rise Gold Corp. has submitted a Writ of Mandamus to the Superior Court, asking the court to compel the County to follow applicable law and grant the company recognition of its vested right to operate the mine.

Key Takeaways:

  • Rise Gold Corp. is seeking to unlock the value of its Idaho-Maryland Mine, which produced an estimated 2.4 million ounces of gold from 1862 to 1957.
  • The Company has asserted its constitutionally-protected vested right to mine at the site without a use permit, based on a zoning ordinance adopted by the County in 1954.
  • The County has rejected the Company's claim, citing the lack of evidence showing the Company's intent to resume mining.
  • However, the Supreme Court of California has ruled in a similar case that cessation of use alone does not constitute abandonment of a vested right.
  • The Company has submitted a Writ of Mandamus to the Superior Court, asking the court to compel the County to follow applicable law and grant the Company recognition of its vested right to operate the mine.
  • The County's argument that the Company's name change from Idaho Maryland Mines Corporation to Idaho Maryland Industries Inc., implies abandonment of the mine's vested right, does not withstand scrutiny as per the holding in Hansen Bros. v. Nevada County Board of Supervisors.
  • Megan Wold, a partner of the litigation firm Cooper & Kirk, representing Rise Gold Corp. stated, "Constitutional rights do not simply expire, and they can be abandoned only knowingly and intentionally."
  • Joe Mullin, CEO of Rise Gold, commented, "It is unfortunate that the County decided to waste public resources relitigating the Hansen Bros. case, which it lost badly."
  • In the event that the Company loses its case in Superior Court and is denied a vested right to mine, management intends to file a federal lawsuit to vindicate the Company's Fifth Amendment right to just compensation, estimated to be at least $400 million.

Statistics:

  • The Idaho-Maryland Mine produced an estimated 2.4 million ounces of gold from 1862 to 1957.
  • The Company has submitted a Writ of Mandamus to the Superior Court, which will be heard on January 9, 2026.
  • The County has agreed to a reasonable schedule for the litigation, with Rise Gold Corp. submitting its initial brief on September 15, the County submitting its opposition by November 18, Rise Gold Corp. replying by December 5.
  • The fair market value of Rise's mineral estate is estimated to be at least $400 million.

Sources:

Rise Gold Corp. Press Release dated September 16, 2025.

Supreme Court of California, Hansen Bros. Enter., Inc. v. Nevada Cnty. Bd. of Supervisors (1996).

Cooper & Kirk Commentary, dated [current date].