DWI on Federal Property — Parks, Lakes and Federal Land

Texas has a great deal of federal land that does not look federal. Lake Texoma, Lake Lavon, Lavon's access roads, Big Bend, the Padre Island seashore, VA medical campuses, and federal building grounds are all examples.

An arrest there is a federal arrest — and on National Park Service land the applicable BAC limit can be lower than the one you know.

Federal land in Texas that does not look federal

Army Corps of Engineers lakes — Texoma, Lavon, Grapevine, Lewisville, Benbrook, Whitney, Belton, Stillhouse Hollow, Somerville and others. The lakes, the surrounding parkland, and many access roads are federal property, and Corps rangers and federal officers patrol them.

National Park Service — Big Bend, Guadalupe Mountains, Padre Island National Seashore, Lake Meredith, Amistad, San Antonio Missions, Lyndon B. Johnson NHP.

National forests and grasslands — the Sam Houston, Angelina, Davy Crockett, and Sabine national forests, and the LBJ National Grasslands.

Other federal property — VA medical center campuses, federal courthouse and building grounds, post office property, federal wildlife refuges, and military installations covered on our military base page.

Two ways the charge arises

An agency regulation. Where the controlling agency has its own rule, that rule applies directly. The most significant is the National Park Service regulation.

The Assimilative Crimes Act. Where no federal statute or regulation covers the conduct, 18 U.S.C. § 13 adopts Texas law — so you are charged federally with violating Texas Penal Code § 49.04.

Which route applies determines the elements, the threshold, and the penalty, so identifying it is the first step.

The Park Service rule and its lower threshold

On National Park Service land, 36 C.F.R. § 4.23 governs. It prohibits operating a vehicle while under the influence to a degree that renders the operator incapable of safe operation, or with a blood alcohol concentration of 0.08 or more.

Critically, the regulation also provides that where state law establishes a lower limit than 0.08, the state limit applies on park land. The penalty is up to six months imprisonment and a fine under 18 U.S.C. § 1865 — a petty offense, meaning no jury right.

The regulation also has provisions on open containers and on refusal, and its implied consent framework is not the Texas one. Assuming Texas refusal law applies on park land is a common error.

Corps of Engineers land

Corps property is governed by 36 C.F.R. part 327, which addresses vehicle operation and restricts alcohol in certain areas, and which incorporates state traffic law on Corps roads in many circumstances. In practice DWI arrests on Corps land are frequently charged through the Assimilative Crimes Act using Texas law.

Boating adds a layer. Operating a vessel while intoxicated on these lakes can be charged federally as well, and Texas boating while intoxicated law may be assimilated. Which is why an arrest on the water and an arrest on the access road can proceed under different provisions.

How the case proceeds

Most begin with a violation notice processed through the Central Violations Bureau, showing a date to appear before a United States magistrate judge. A CVB notice is a criminal charge, not a ticket — paying the collateral amount on a DWI-type offense is not available, and ignoring it produces a warrant.

Petty offenses are tried to the magistrate judge without a jury. Where the exposure exceeds six months, the jury right attaches. Federal probation is available; Texas deferred adjudication and county DWI programmes are not.

The defenses are still the familiar ones

Where Texas law is assimilated, the substantive analysis is the analysis any Texas DWI lawyer knows — reasonable suspicion for the stop, the validity of field sobriety testing under NHTSA protocols, breath instrument reliability, blood draw and chain of custody, and the warrant supporting any blood specimen. See our Texas suppression guide.

The important divergence: Texas article 38.23 does not apply in federal court. The broader Texas exclusionary rule, and the jury instruction it carries, are unavailable. Federal Leon good faith governs instead — the same trade-off discussed on our task force page.

Consequences worth knowing

A federal conviction is a federal criminal record, and it will appear on background checks that matter for employment, licensing, and immigration. Federal probation conditions are supervised by U.S. Probation and are generally more rigorous than county-level supervision.

License consequences require the same careful analysis as on a military installation: Texas ALR is keyed to a specimen request by a Texas peace officer, which a federal ranger’s request does not straightforwardly satisfy, but a conviction may still carry consequences. It should be checked rather than assumed.

Related pages

DWI on a military base · Federal DWI overview · Boating while intoxicated · Texas DWI suppression