Property Lines in Wyoming Are Defined by the PLSS
Every property line in Wyoming traces back to the Public Land Survey System, the rectangular grid of townships, ranges, and sections that federal surveyors imposed on the American West beginning in the late 1700s. In Wyoming, U.S. General Land Office (GLO) surveyors established this grid during fieldwork conducted primarily in the late 1800s and early 1900s. The physical monuments they set, known as GLO corners, are the legal anchors for every property boundary in the state.
When you read a Wyoming deed or legal description, you will see references to a township (distance north or south of a base line), a range (distance east or west of the Sixth Principal Meridian), and a section number (one of 36 blocks within a township, each nominally one square mile). These references tell you where your land is in the PLSS grid. What they do not tell you is precisely where the lines defining that grid fall on the actual ground in front of you. Answering that question is the work of a licensed Professional Land Surveyor.
Why Consumer GPS Cannot Locate Wyoming Property Lines
A common question among Wyoming landowners is whether a smartphone GPS app or a consumer-grade handheld GPS unit can locate property corners reliably. The answer is no, for several reasons that are especially significant in Wyoming.
Consumer GPS devices typically achieve horizontal accuracy of three to fifteen feet under good conditions, and often worse in terrain that blocks satellite signals. A three-foot error in corner location translates to a potential encroachment of several hundred square feet on even a modest lot. On a large ranch parcel, the cumulative effect of relying on consumer GPS to locate corners can be enormous.
Beyond the accuracy limitation, locating a Wyoming property corner is not simply a matter of navigating to a set of coordinates. It requires understanding which recorded survey established the corners that govern your parcel, researching BLM cadastral records to find the original GLO survey notes and plat data, knowing how to interpret and apply that historical survey data, and then searching the physical ground for surviving monuments or calculating positions from adjacent corners using professional survey mathematics. None of this is possible with a GPS app.
What Happened to the Original GLO Corners?
The GLO surveyors who established Wyoming's PLSS grid used wooden posts, stone mounds, and iron pipes as corner monuments, depending on what materials were available in a given area and time period. Over the century or more since those surveys were completed, many of those monuments have been lost. Common causes of monument loss in Wyoming include:
- Burial under decades of sediment accumulation in low-lying areas and along stream channels
- Disturbance by agricultural equipment, particularly in areas of intensive cultivation or irrigation
- Destruction by oil and gas development activity, including drilling, road construction, and pipeline installation
- Deterioration of wooden posts and stone cairns over time
- Removal by well-intentioned but uninformed landowners who did not recognize what they found
When a GLO corner cannot be found, a licensed PLS must restore it through a process called a dependent resurvey. This involves researching the original GLO survey notes to understand the surveyor's intent, locating all surviving corners in the surrounding area, and calculating the position of the missing corner using the geometric relationships defined in the original survey. The restored corner is then monumented and documented in a survey record.
The Role of BLM Cadastral Records
The Bureau of Land Management maintains the cadastral records for Wyoming's original GLO surveys, including the original survey notes, plat maps, and any subsequent resurveys authorized by the federal government. These records are the primary source of authority for the PLSS grid in Wyoming, and researching them is a standard part of boundary work throughout the state.
When a licensed PLS takes on a boundary survey in Wyoming, they review BLM cadastral records to understand how the corners affecting the subject parcel were originally established, whether any federal resurveys have been conducted in the area, and what the original survey notes say about the character of the ground and the monuments set. This research, combined with field work to locate surviving monuments, forms the foundation of a legally sound boundary determination.
Energy-Related Boundary Complexity in Wyoming
Wyoming's energy economy adds a layer of boundary complexity that is relatively unique to the state. Oil and gas leases, surface use agreements, pipeline easements, and mineral rights conveyances are all described using PLSS references, just as surface ownership parcels are. When a landowner's surface rights are separated from the mineral rights beneath their land, the boundaries of each interest must be determined independently.
On the surface, a pipeline easement described as running along a section line must be located by finding that section line on the ground. A surface use agreement governing where an operator can place a well pad, access road, and surface facilities is bounded by lines that a PLS must establish. A royalty interest in the production from a specific section requires knowing exactly where that section's boundaries lie.
Near active or historic energy development areas in Wyoming's Powder River Basin, Green River Basin, Wind River Basin, and other producing regions, original corner monuments may have been disturbed by decades of oilfield activity. A PLS experienced in Wyoming's energy regions understands this context and knows how to research and field-locate corners in areas where development has been intense.
What a Wyoming PLS Does to Find Your Property Lines
When you hire a licensed Professional Land Surveyor to locate your property lines in Wyoming, the process typically includes the following steps:
- Research of county deed and plat records to identify the legal description governing your parcel and any adjoining parcels
- Research of BLM cadastral records to obtain the original GLO survey notes and plat data for the section corners affecting your land
- Review of any prior surveys of the subject parcel or adjacent parcels that are on record
- Field search for surviving GLO corner monuments and other reference monuments in the area
- GPS and total station measurements to establish precise positions for located monuments and calculate positions for any that must be restored
- Setting of new monuments at property corners established by the survey
- Preparation of a survey record documenting the work, which may be recorded with the county clerk
The result is a legally defensible determination of where your property lines lie, documented in a form that you and any future owner can rely on.
Costs for Property Line Location in Wyoming
Survey costs in Wyoming reflect the wide range of parcel types and conditions in the state. For a residential lot in an established neighborhood in Casper, Riverton, or another Wyoming city, a boundary survey locating all property corners typically costs $700 to $1,600. For a rural ranch parcel, remote agricultural land, or a parcel with significant energy-related boundary complexity, costs commonly start at $2,500 and rise with acreage and the number of corners that need to be established or restored.
Getting a written scope of work and cost estimate from a licensed PLS before proceeding is always advisable. The surveyor can tell you what research will be required, how accessible the corners are likely to be, and what the total cost will include.
Our Wyoming surveyor directory connects you with licensed Professional Land Surveyors throughout the state, ready to help you locate your property lines accurately and legally.