PLSS Legal Descriptions for Oil & Gas

Every drilling permit filed with a state oil and gas commission starts with a legal land description. In the 30 states that use the Public Land Survey System, that description follows the same format: section, township, range, and principal meridian. Get it wrong, and the permit gets kicked back. Get it right, and the well location is pinned to a specific parcel on the survey grid.

If you work in oil and gas — as a landman, field operator, lease analyst, or regulatory coordinator — PLSS descriptions are part of your daily workflow. This page covers how the industry uses them, where mistakes happen, and how to convert them to GPS coordinates quickly.

How Oil & Gas Uses PLSS Descriptions

The PLSS grid divides land into 6-mile-square townships, each containing 36 sections of approximately 640 acres. Sections subdivide further into quarter sections (160 acres) and quarter-quarter sections (40 acres). A full legal description looks like this:

T4N R5E Sec 12 NE1/4 — Indian Meridian

That tells you: Township 4 North, Range 5 East, Section 12, Northeast Quarter, measured from the Indian Meridian in Oklahoma. It identifies a specific 160-acre parcel.

Oil and gas professionals encounter these descriptions in:

• Applications for Permit to Drill (APDs) filed with state commissions and the BLM
• Mineral leases that define the lands covered by the lease
• Pipeline right-of-way agreements specifying the corridor a pipeline crosses
• Sundry Notices and regulatory filings throughout a well's life
• Division orders that allocate production revenue to mineral interest owners
• Surface use agreements between operators and landowners

Every one of these documents requires an accurate PLSS description. A transposed range number — writing R5W instead of R5E — puts you in a completely different county.

Major Play Areas and Their Meridians

SCOOP/STACK — Oklahoma

The SCOOP (South Central Oklahoma Oil Province) and STACK (Sooner Trend Anadarko Canadian Kingfisher) plays in central Oklahoma reference the Indian Meridian. Descriptions typically look like:

T7N R6W Sec 24 SW1/4 NW1/4 — Indian Meridian

That's a 40-acre drilling unit in Canadian County. Oklahoma's Corporation Commission requires exact quarter-quarter descriptions on every well permit. Landmen running title in the SCOOP/STACK process hundreds of these descriptions per project, cross-referencing them against county records, lease files, and division order title opinions.

Learn more about Oklahoma's PLSS grid and the Indian Meridian.

Bakken — North Dakota

The Bakken and Three Forks formations in western North Dakota use the 5th Principal Meridian. A typical well permit description reads:

T153N R95W Sec 14 NE1/4 — 5th Principal Meridian

North Dakota's Industrial Commission requires the full legal description on Form 1 (Application for Permit to Drill). Spacing units in the Bakken are commonly 1,280-acre units (two sections), so operators reference multiple sections in a single filing. Field crews need GPS coordinates to reach the well pad, which means converting the legal description from the permit into a location they can drive to.

See how North Dakota's PLSS grid works.

Permian Basin — New Mexico

The New Mexico portion of the Permian Basin — including the Delaware Basin and Northwest Shelf — uses the New Mexico Principal Meridian. Descriptions follow this pattern:

T22S R30E Sec 8 SE1/4 NE1/4 — New Mexico Principal Meridian

New Mexico's Oil Conservation Division requires legal descriptions on all APDs. The Permian Basin's dense well spacing means operators file large numbers of permits in a concentrated area, and each one needs an accurate legal description tied to the correct section.

Explore New Mexico's PLSS grid.

Workflow Scenarios

Scenario 1: Landman Running Title for a New Lease

A landman in the STACK play receives an assignment to check title on a prospective lease covering Sec 15, T12N, R8W, Indian Meridian in Blaine County, Oklahoma. The workflow:

1. Pull the legal description from the county assessor's records
2. Run the tract through the county clerk's grantor-grantee index to build the chain of title
3. Verify mineral ownership by examining deeds, probates, and prior leases — all referencing the same PLSS description
4. Convert the legal description to GPS coordinates to verify the parcel on a map and confirm it matches the prospect area
5. Prepare a title opinion referencing the exact quarter-quarter descriptions for each mineral interest

At step 4, the landman needs a fast conversion from the written legal description to a mappable location. Manually looking up coordinates from BLM plat maps works, but it is slow — especially when the assignment covers 20 or 30 sections.

Scenario 2: Pipeline ROW Acquisition

A midstream company is planning a 40-mile gathering line from a central processing facility to well pads across four townships in the Bakken. The route crosses approximately 120 parcels, each identified by its PLSS legal description.

The ROW agent needs to:

1. List every section the pipeline crosses
2. Identify the quarter-quarter section where each entry and exit point falls
3. Match each parcel to its surface owner using county records
4. Generate GPS coordinates for the centerline to share with survey and engineering teams
5. Prepare exhibits for each easement agreement showing the legal description and a map

Converting 120+ PLSS descriptions to GPS coordinates by hand takes a full day. Running them through a batch converter takes a few minutes, and the output feeds directly into GIS mapping software.

Scenario 3: Regulatory Filing for a BLM Well

An operator is drilling on federal land managed by the Bureau of Land Management in the Permian Basin. The APD requires the legal description in standard PLSS format, and the BLM cross-checks it against the official cadastral survey plats.

The regulatory coordinator needs to:

1. Confirm the legal description matches the BLM's Master Title Plat for the section
2. Verify the surface location falls within the approved spacing unit
3. Include GPS coordinates (latitude and longitude) on the APD surface location plat
4. Ensure the description uses the correct principal meridian — New Mexico Principal Meridian, not the 6th Principal Meridian used in neighboring Colorado

A mismatched meridian reference is one of the most common causes of APD rejection. The legal description might be correct in every other way, but if the meridian is wrong, the BLM sends it back.

Common Mistakes in Oil & Gas PLSS Descriptions

• Transposed township or range numbers — Writing T22N instead of T22S puts you in a different state
• Wrong principal meridian — Oklahoma uses the Indian Meridian and the Cimarron Meridian; mixing them up changes the location entirely
• Missing quarter-quarter call — State commissions often require precision to the 40-acre level; a description stopping at the quarter section (160 acres) may be rejected
• Incorrect section number — Sections are numbered in a serpentine pattern (1-6 east, 7-12 west, etc.); skipping or transposing creates errors that compound through filings

Converting PLSS Descriptions to GPS Coordinates

Every legal description in a drilling permit, lease, or ROW agreement can be converted to GPS coordinates — a latitude and longitude pair that maps to the center of the described parcel. This conversion is essential for:

• Plotting well locations on maps and in GIS software
• Sending field crews to the correct site
• Cross-referencing regulatory filings with spatial data
• Building digital land databases from paper records

Township America converts PLSS legal descriptions to GPS coordinates using official BLM survey data. Enter a single description or upload a batch of hundreds. Each conversion returns the parcel center coordinates, ready for mapping.

Try the PLSS Converter to convert your legal descriptions to GPS coordinates.

Further Reading

• How the PLSS Works — Understand the full structure of the Public Land Survey System
• PLSS Legal Descriptions for Mineral Rights — How mineral interest owners and title examiners use PLSS descriptions
• Oklahoma PLSS Grid — Indian Meridian, Cimarron Meridian, and Oklahoma's survey system
• North Dakota PLSS Grid — 5th Principal Meridian and Bakken-specific considerations
• New Mexico PLSS Grid — New Mexico Principal Meridian and Permian Basin coverage