Magnet Fishing & Historical Artifacts — What the Law Says You Must Do

The Archaeological Resources Protection Act (ARPA)

The Archaeological Resources Protection Act of 1979 (16 U.S.C. §§ 470aa–470mm) is the primary federal law governing archaeological finds on public lands. It applies to all federal public lands managed by agencies including the Bureau of Land Management, U.S. Forest Service, Army Corps of Engineers, National Park Service, and Bureau of Indian Affairs.

Under ARPA, an "archaeological resource" includes any material remains of past human life or activities that are at least 100 years old. This is a broad definition that covers coins, tools, weapons, structural remains, personal items, and almost anything that was manufactured before 1926 and is found on covered lands.

Magnet fishing intersects with ARPA most directly on federal waterways: rivers managed by the Corps, lakes on Forest Service land, and any waterway within a federal recreation area or park. These are precisely the kinds of productive spots that attract experienced magnet fishers. The statute does not distinguish between commercial artifact hunting and recreational recovery — intent is not a defense if you remove a covered item.

Penalties scale with the value of the removed items. First-offense criminal penalties for items with archaeological value over $500 can reach $20,000 in fines and two years in prison. For items valued over $5,000, penalties increase to $100,000 and five years. These are federal felonies.

State Antiquity Laws

Every U.S. state has its own antiquity or historic preservation statute that applies to state-managed lands, including state-managed waterways. Most of these laws mirror ARPA's framework — protecting items over 100 years old found on public land — but several extend further:

• Texas: The Texas Antiquities Code (Texas Natural Resources Code §§ 191.001–191.215) covers "landmarks" on state-owned land, including waterways. Texas defines a landmark as any item of historical significance found on state property — notably without an age threshold in some provisions. The permit requirement applies to any recovery activity, not just professional archaeology.
• Florida: Florida's Historical Resources Act (§§ 267.001–267.13) applies to all submerged state lands, which includes virtually all waterway beds in Florida. Recovering items from the bottom of a state waterway without a permit may violate this statute regardless of whether the item appears historically significant.
• Virginia: Virginia Code § 10.1-2305 protects "archaeological sites and objects" on state-owned property, explicitly including submerged cultural resources in state waters. Virginia has been active in prosecuting unauthorized recovery of artifacts from the James and Potomac Rivers.
• North Carolina: G.S. 70-12 prohibits disturbing or removing any artifact from state-owned land without a permit from the Office of State Archaeology. Violations are Class 1 misdemeanors for first offenses, escalating to felony charges for subsequent violations or high-value items.

Find your state's specific statute on your state law page.

How to Identify a Potentially Historical Find

Most magnet fishing finds are obviously modern junk — shopping carts, bicycle frames, phone cases. Historical artifacts are rarer but real. Signs that something may be historically significant:

• Craftsmanship techniques that don't match modern manufacturing (hand-forged iron, hand-cut threads, dovetail joinery)
• Markings, symbols, or stampings that suggest pre-20th century manufacture
• Weapon types associated with historical periods (flintlock pistol mechanisms, swords, bayonets)
• Items recovered near known historical sites, battlefields, or ports
• Anchors, chain segments, or fittings that appear to predate steel construction
• Coins or currency with dates prior to 1924

You do not need to be certain — if something could be historically significant, treat it as if it is. This protects you legally and ensures legitimate artifacts get to the right authorities.

What to Do When You Find Something Potentially Historical

The protocol is straightforward, though different from other dangerous finds:

1. Do not clean, restore, or alter the item. Conservation of archaeological artifacts is a specialized discipline — improper cleaning destroys information that researchers use to date and identify objects.
2. Document the find location precisely. GPS coordinates, waterway name, depth if known, and any surrounding context you can describe. Provenience (context of discovery) is what makes an artifact scientifically valuable.
3. Contact your State Historic Preservation Office (SHPO). Every state has one — it's the designated agency for archaeological resources on state lands. They will either take possession, ask you to surrender the item to a local law enforcement or agency office, or (rarely) determine the item is not protected.
4. If found on federal land, contact the managing agency. For Corps of Engineers waterways, call the district office. For Forest Service, contact the ranger district. For BLM land, contact the field office.
5. Preserve the item as-is in the meantime. Keep it in water if it came from water — sudden drying can cause irreversible structural damage to waterlogged iron and wood. Store in a clean container of water, not tap water if you can avoid it (minerals in tap water can accelerate corrosion).

Items That Are Always Off-Limits to Keep

Regardless of where you find them, certain categories of items have absolute legal protections:

• Native American artifacts: The Native American Graves Protection and Repatriation Act (NAGPRA) and ARPA together create very strong protections for items associated with Native American cultural heritage, including items found in or near waterways in territories with tribal significance.
• Shipwreck components: The Abandoned Shipwreck Act (43 U.S.C. §§ 2101–2106) transfers title of abandoned historic shipwrecks to states. Any component of a historic shipwreck recovered from a state waterway is state property, not finders-keepers.
• Military items: Federal law (10 U.S.C. § 2579 and related statutes) controls the disposition of U.S. military equipment, including equipment that has been abandoned or submerged. Finding a piece of military hardware doesn't convey ownership.

The Finder's Exception: When You Might Be Able to Keep Something

On private land, with the landowner's permission, many of these restrictions don't apply — ARPA explicitly applies only to public land. If you have permission from a private landowner to magnet fish a pond, creek, or river on their private property, and you find an item that is historically interesting but not specifically protected by other statutes (NAGPRA, Abandoned Shipwreck Act), you may legally keep it. Private land is outside ARPA's reach.

This is one reason why building relationships with private landowners is valuable beyond just access — it changes the legal framework for everything you find.

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