Ask five buyers looking at acreage between McGregor and Gatesville what drives value in the Oglesby corridor, and four will point to the same thing: the SpaceX site seven miles east, roughly 4,300 acres of active engine testing and a $150 million expansion that keeps adding jobs to McLennan County's payroll. The fifth might mention the county median, which sits near $12,698 per acre across listings that average 123 acres. Neither answer is wrong. Neither is the answer.
The answer is that Coryell County was designated a Priority Groundwater Management Area by the Texas Commission on Environmental Quality, and every tract around Oglesby now sits under Middle Trinity Groundwater Conservation District rules that quietly sort the market into two piles. One pile has a live path to a Water Supply Corporation meter and can be subdivided on a normal timeline. The other pile is gated by a hydrogeological study that has to certify a 30-year supply for the entire ultimate build-out. The per-acre spread between those two piles does not show up on any listing portal.
The rule that reprices half the market
Coryell County joined Middle Trinity GCD in June 2010 after TCEQ flagged it as a Priority Groundwater Management Area, meaning the state expected shortages, quality issues, or contamination without active district-level management. That single designation changed what a subdivider has to prove before a plat gets recorded.
Under the district's subdivision policy for Coryell County, if individual wells or any non-public water system will supply drinking water to a proposed subdivision, the developer's plat application must include a groundwater availability study, prepared by a licensed professional engineer or licensed geoscientist registered in Texas, certifying the long-term quantity and quality of available supply relative to the ultimate needs of the subdivision for a term of not less than thirty years. Lot minimums land at two acres with a private well and septic, and the subdivider is also required to consult directly with the district.
That study is not a checkbox. It is a hydrogeological work product tied to the Trinity aquifer, and its conclusions depend on where the tract sits relative to existing pumping, monitoring wells like the one off FM 116 near Copperas Cove that reads the Hensell formation at 440 feet, and the district's Desired Future Conditions adopted through Groundwater Management Area 8. Two adjoining parcels can return different answers.
For a buyer, the friction shows up at three moments a portal never shows:
- During due diligence, when a feasibility engineer prices the availability study and the geotechnical work behind it.
- During plat review, when the district's consultation and any conditions get folded into county approval.
- During resale, when the next buyer's lender asks whether the yield assumptions in that 30-year study still hold.
Rule of Capture still governs the underlying water right in Texas, which is what makes the district's spacing and permitting authority the real lever. As the district itself frames it, without that authority the largest casing, biggest pump, and deepest well would dominate what sits beneath the surface. Buyers who assume "unrestricted" acreage on a listing sheet means unrestricted development read the wrong document.
Two piles, one corridor
The Oglesby-area listings that move quickly tend to disclose one specific thing: a Water Supply Corporation meter is available or in place. Several tracts along FM 185 and the county roads north of Highway 84 advertise Coryell City water line frontage with meters subject to infrastructure upgrades. Others near CR 220 list Multi-County Water availability. Those disclosures are doing more work than they appear to.
| Signal on the listing | What it usually means for subdivision path | Where the friction sits |
|---|---|---|
| Coryell City WSC or Multi-County WSC meter available | Public supply option exists, MTGCD subdivision-study requirement may not apply to lot creation | Meter capacity, tap fees, WSC's own service extension policies |
| Well water only, ag-exempt, unrestricted | Subdivision on wells triggers 30-year availability study and 2-acre minimums under MTGCD rule | Study cost, timeline, and whether the aquifer at that location supports the yield |
| Existing single homesite, no subdivision intent | Exempt well allowed for domestic and livestock use if incapable of producing more than 25,000 gallons per day | Registration with MTGCD before drilling, ongoing compliance |
| Live-water frontage on the Leon River or a creek | Surface water is not a substitute for potable supply under state subdivision rules | Floodplain, riparian setbacks, and separate surface-water rights analysis |
The single most consequential question a buyer can ask about an Oglesby tract is which pile it belongs to. The next question is what the seller has already done, if anything, to move it from the second pile to the first.
Why the SpaceX story misleads on price
The Rocket Development and Test Facility in McGregor has been described by the company as the most advanced and active rocket engine test facility in the world, with every SpaceX engine passing through for final testing. As of January 2026, Raptor 3 development and qualification, Merlin work, and Falcon 9 second-stage testing were the active programs on site, and the McLennan County incentive agreement tied to Phase II investment thresholds ran through 2026 milestones.
That gravitational pull is real. It also does not touch groundwater hydrology. A tract seven miles from Rocket Road is priced by the same aquifer conditions as a tract seventeen miles away. When a listing leans on SpaceX proximity to justify a per-acre premium, the buyer's underwriting question is whether the premium is being paid for future demand or for a build path that already exists. Those are two very different assets.
A useful stress test:
- If the tract is on a WSC line with meters available, the SpaceX proximity is priced against a subdividable asset. Comparable analysis holds.
- If the tract is well-only, the SpaceX proximity is priced against a tract whose highest and best use depends on a study nobody has yet ordered. Comparable analysis fails silently.
The 2022 pushback on a proposed 595-home subdivision along CR 267, CR 268, CR 272 and U.S. 84 in the Oglesby area was not a zoning fight in the conventional sense. It was residents doing the well-capacity math out loud before the district or the developer did. That episode is a useful signal for any current buyer running numbers on multi-lot development in the same corridor.
What the tax math actually looks like
Coryell County's effective property tax rate lands around 1.41% by broad market summaries, higher than the Texas norm. Layered on top is the MTGCD ad valorem levy at $0.0073 per $100 of property valuation, a small line item but a required one for any owner inside the district. Ag valuation, where it exists on productive pasture and hay ground, materially lowers the annual carry, which is why so many Oglesby-area tracts market with existing ag exempt status through Coryell CAD.
For a buyer intending to convert use, the practical question is not whether ag valuation can be preserved, but for how long, and what the rollback exposure looks like when the intended residential or development use begins. Legal descriptions and acreage should be verified against Coryell CAD records before contract, not after.
Underwriting questions that separate the piles
For a builder, investor, or lifestyle buyer looking at acreage between McGregor and Gatesville, five questions do most of the work:
- Is there a Coryell City WSC or Multi-County WSC line at the road, and has the WSC confirmed in writing that meters are available at the density the buyer intends?
- If wells are the plan, has any groundwater availability study been prepared on this tract or an adjoining one, and what did the yield and drawdown modeling conclude?
- Where does the tract sit relative to the nearest MTGCD monitor well, and what has that well's water-level trend done over the past several review cycles?
- Is the existing well, if any, registered with MTGCD, and does its use qualify for the exempt category of domestic and livestock use under the 25,000 gallon per day cap?
- What ag valuation is currently in place through Coryell CAD, and what would a change of use trigger?
None of those questions get answered by a price-per-acre pull. All of them get answered by a feasibility file.
FAQ
Does the Middle Trinity GCD subdivision rule apply to a single homesite on acreage? The 30-year availability study and 2-acre subdivision minimum are tied to subdivision plats where wells or other non-public systems supply drinking water. A single exempt well serving one household for domestic and livestock use, incapable of producing more than 25,000 gallons per day, falls under the exempt category but still requires registration with the district before drilling.
Is SpaceX's McGregor expansion changing groundwater availability directly? The public record on the McGregor facility discusses infrastructure upgrades on site, including water, as part of the incentive agreements. What matters for Oglesby-area acreage is the aquifer trend under Middle Trinity's monitoring program, not the industrial site's own supply arrangements. Those are separate questions.
Can surface water frontage on the Leon River substitute for a potable supply plan? No. Surface water rights and potable supply for a subdivision are governed by different regimes, and the district's subdivision policy speaks specifically to groundwater or non-public water systems used for drinking water. River frontage is an amenity and a floodplain question, not a supply solution.
Where this leaves a serious buyer
The reason the Oglesby corridor rewards patient underwriting is that its pricing has not yet fully separated the two piles. Some sellers price WSC-served tracts as if they were well-only. Some price well-only tracts as if the study risk did not exist. That inefficiency is the opportunity, and it closes as more buyers learn to ask the questions above.
Land Homes Texas runs feasibility reviews built around exactly this kind of split market, coordinating the engineering, entitlement, and lender-ready documentation that turns an ambiguous tract into a financeable one. If you are evaluating acreage between McGregor and Gatesville and want the water path and the subdivision path answered before you write an offer, request a feasibility review and we will work the file with you.
