Mineral Rights in Washington State: Ownership, Leases, and Taxes

Mineral rights in Washington State are treated as real property, and they can be owned separately from the land above them. That single fact drives almost everything else: the person who owns the surface of a parcel may or may not own what lies beneath it, and figuring out who does requires tracing the deed history back to the original patent. Once ownership is clear, Washington law governs how mineral interests are leased, developed, taxed, and — in some cases — reclaimed by the surface owner after long periods of non-use.

How Minerals Get Separated From the Surface

Any transfer of real estate or an interest in it in Washington must be made by deed.¹ A landowner can sell the surface while reserving the minerals, or sell the minerals while keeping the surface. Either move creates a split estate: two separate pieces of real property with their own title histories.

Once severed, a mineral interest is perpetual unless the deed says otherwise. It can be sold, leased, inherited, or mortgaged on its own. If a deed says nothing about minerals, they pass with the surface by default. The trouble is that many Washington properties had their minerals severed generations ago, often by federal or state land grants in the late 1800s and early 1900s. A single deed from decades back containing words like “excepting,” “reserving,” or “subject to” any subsurface reference can mean the minerals have been on a separate chain of title ever since.

Finding Out Who Owns the Minerals Under a Property

Determining mineral ownership on a specific parcel starts at the county auditor’s office. Pull the legal description — township, range, and section — and work backward through every recorded deed from the present to the original land patent. At each transfer, read for reservation language.

Three possible owners sit at the end of that trail:

The current surface owner, if no severance ever happened.
A private third party or their heirs, if a prior deed reserved the minerals.
The state or federal government, if the original patent kept them public.

For state ownership, the Department of Natural Resources (DNR) maintains online mapping tools that cross-reference legal descriptions against known state-owned mineral tracts. When the state historically sold land to private buyers, it routinely kept the mineral rights, so many private surface owners in Washington sit on top of state-owned subsurface assets.²

For federal ownership, the Bureau of Land Management’s General Land Office records and Master Title Plats show whether the federal government retained minerals at the time of the original patent. The BLM’s Mineral and Land Records System is the primary online source for current mineral lease status on federal lands.³

One warning worth taking seriously. A standard title insurance policy on a home purchase usually does not cover mineral rights, and a routine title search may not flag a severance buried in a 1930s deed. If minerals matter to you — because you want to develop, because you’re worried about someone else developing, or because you’re being asked to sign something — hire a landman or a title company with mineral experience. Doing this before closing is far cheaper than sorting it out afterward.

Reclaiming Dormant Mineral Rights

Washington is one of a handful of states that lets surface owners take back private mineral interests that have gone unused. Under the state’s abandonment statute, any mineral interest that has sat dormant for 20 years can be extinguished by the surface owner.⁴

After the 20-year dormancy period, the surface owner gives 60 days’ written notice to the current mineral holder of the intent to file a claim of abandonment and extinguishment.⁴ If the mineral owner does not respond, the surface owner records the claim, along with a copy of the notice and an affidavit of publication, at the county auditor’s office. Once filed and the fee is paid, the mineral interest is conclusively presumed extinguished and merges back into the surface estate.

The mineral owner can prevent this by acting during the notice period — filing a statement of claim, or starting actual exploration or development. But if the minerals have truly been idle for two decades, with no activity, no leasing, and no recorded use, the surface owner has a real path to reclaim them. That path is often overlooked and can materially change what a property is worth.

When the State Owns the Minerals

The DNR administers mineral rights on millions of acres of state trust lands, held in trust primarily for public schools and universities. Where the state owns the subsurface under private land, the DNR has authority to lease those minerals to third parties for exploration and extraction. That is worth understanding early if you are planning surface development, because a state mineral lease could allow drilling or mining activity on land you assumed was entirely yours.

Prospecting Leases

The DNR uses a two-step system: a prospecting lease first, then a mining contract if exploration succeeds.⁵ An applicant files on the prescribed form and pays the required application fee.⁶ Prospecting leases run up to seven years, with annual rental and annual prospecting work requirements set by the Board of Natural Resources.⁷ A prospecting lease does not authorize commercial extraction; that requires converting to a mining contract, which can be done up to 180 days before the seven-year term expires.

Oil and Gas Leases

Oil and gas leases on state land follow a separate framework. Initial terms run five to ten years and continue beyond that as long as the lessee is actively drilling, producing, or participating in a unit plan. Annual rental is at least $1.25 per acre, prorated for the state’s ownership share, paid in advance. The statutory minimum royalty is 12.5% of gross production, with a floor of at least $5 per acre once production reaches paying quantities. If oil or gas has not been found by the end of the initial term but drilling is proceeding with due diligence, the lease stays alive as long as drilling continues without more than a 90-day gap between wells.⁸

Surface Owner Protections in State Leases

Before a lessee can begin operations on state-leased mineral land, the DNR must approve a plan of development and operation.⁹ The plan has to address five categories:

Environmental protection and reclamation after operations end.
Compensation to the surface owner or occupier for damages.
Protection of continued surface uses like grazing, agriculture, and timber.
Safeguards for the surface owner’s water supply for domestic, livestock, and irrigation use.
Protection of fences, buildings, and other improvements.

The lessee must also post a performance bond of no less than $5,000, and the DNR can require more depending on project scope.⁹ The bond backs reclamation and surface damage claims.

When the Federal Government Owns the Minerals

Large portions of Washington, particularly in the eastern and central parts of the state, were originally distributed under federal programs that reserved minerals for the government. The Stock Raising Homestead Act of 1916 is a major source of split estates in the western United States, and those reservations remain in effect today.

If federal minerals sit under your land, a mining claimant must file a Notice of Intention to Locate with the Secretary of the Interior and give you written notice by certified mail at least 30 days before entering. The notice must describe the proposed activities, include a map and legal description, and identify who is managing operations.¹⁰ No surface-disturbing activity beyond initial exploration can proceed without either your written consent or an approved BLM plan of operations.

Before BLM authorizes mining, the claimant must post a bond covering reclamation, permanent damage to crops and improvements, and permanent loss of grazing or other surface income that reclamation cannot restore. Surface owners also receive annual rental at fair market agricultural rates during operations.¹⁰ One limit worth knowing: you cannot recover compensation for loss of property value caused by the mining claim itself.

Environmental Review and Permitting for Extraction

A lease is not a permit to mine. Washington’s Surface Mining Act (RCW 78.44) requires reclamation permits and bonding for surface mining, with the DNR holding exclusive authority over reclamation. The State Environmental Policy Act (SEPA) generally requires environmental review of mining projects unless a specific exemption applies, so most commercial operations will go through at least an environmental checklist and potentially a full environmental impact statement.

Federal permits often stack on top. Discharges into streams, wetlands, or other waters require a Section 404 permit from the U.S. Army Corps of Engineers under the Clean Water Act, and the Corps will deny a permit where a less damaging alternative exists or where the project would severely degrade the waterway. Commercial operations must also register with the federal Mine Safety and Health Administration and comply with ongoing safety and health standards.¹¹

Timelines can run well over a year for larger projects. Under federal rules updated by the Fiscal Responsibility Act of 2023, environmental assessments must generally be finalized within one year and environmental impact statements within two.

Taxes on Mineral Income and Sales

Mineral royalty income is reported on Schedule E of your federal return unless you are running the operation yourself as a self-employed working interest owner.¹² You report the gross royalty on line 4 and deduct ordinary expenses like management fees, insurance, and property taxes. If state or local taxes were withheld from oil or gas payments, still report the full gross and deduct the withholding separately.

Depletion Deductions

Holders with an economic interest in the property can claim a percentage depletion deduction. Federal rates by mineral type include:¹³

22% for sulphur, uranium, and certain strategic metals including lead, lithium, manganese, nickel, tungsten, and zinc from U.S. deposits.
15% for gold, silver, copper, and iron ore from U.S. deposits, and for geothermal deposits.
10% for coal, lignite, and sodium chloride.
5% for gravel, sand, pumice, and most construction stone.

Oil and gas percentage depletion is handled separately under Section 613A and is generally available only to independent producers and royalty owners, not major integrated companies.

Capital Gains on a Sale

Selling a severed mineral interest held more than a year produces long-term capital gain, taxed federally at 0%, 15%, or 20% depending on total taxable income and filing status. The 3.8% net investment income tax may also apply above the applicable modified adjusted gross income threshold.

Washington Real Estate Excise Tax

Washington’s real estate excise tax (REET) applies to some mineral transfers and not others. An outright sale of severed mineral rights or a patented mining claim is a transfer of real property and triggers REET. A mining lease that grants exploration and extraction rights in exchange for a royalty is not subject to REET, so long as the lease does not transfer ownership of the minerals before extraction. Unpatented mining claims are classified as intangible personal property, so their transfer also falls outside the excise tax.¹⁴ The practical takeaway: budget for REET on an outright sale, and confirm the structure with a tax professional before signing anything that blurs the line between a sale and a lease.

1
Washington State Legislature. Revised Code of Washington 64.04.010 – Conveyances of Real Estate
2
Washington State Legislature. Washington Code 79.14.010 – Definitions
3
Bureau of Land Management. Federal Land Records
4
Washington State Legislature. Washington Code 78.22 – Dormant Mineral Rights
5
Department of Natural Resources. Mining and Mineral Leases
6
Washington State Legislature. Washington Code 79.14.330 – Prospecting Lease Application Fee
7
Washington State Legislature. Washington Code 79.14.350 – Prospecting Leases Term, Rent, Conditions
8
Washington State Legislature. Washington Code 79.14.050 – Drilling Operations Beyond Initial Term
9
Washington State Legislature. Washington Code 79.14.320 – Operating Agreements or Leases, Rights and Duties
10
Office of the Law Revision Counsel. United States Code Title 43 Section 299
11
Mine Safety and Health Administration. Forms and Online Filing
12
Internal Revenue Service. Instructions for Schedule E Form 1040
13
Office of the Law Revision Counsel. United States Code Title 26 Section 613 – Percentage Depletion
14
Cornell Law Institute. Washington Administrative Code 458-61A-112 – Mineral Rights and Mining Claims