Texas

Buying Land in Knox County, Texas

Knox County, seat Benjamin, is Rolling Plains ranch and cotton country that also happens to be a real, active wind-energy county. Here's the one groundwater district that covers the entire county, the septic-permitting picture, and what an existing, operating wind farm's tax and lease record tells a buyer weighing a lease offer of their own.

One Groundwater District Covers the Entire County -- Created by a 1999 Vote

Generally favorable

The Rolling Plains Groundwater Conservation District (RPGCD) has the same boundary as Baylor, Haskell, and Knox Counties combined -- meaning every acre of Knox County sits inside it, with no split-district ambiguity. RPGCD wasn't created by a legislative act alone; Haskell and Knox County voters approved it by election on January 27, 1999, with Baylor County joining in 2000. Confirm current well-permitting, spacing, and registration rules directly with RPGCD before drilling.

A Real, Operating Wind Farm -- and an Active Tax-Incentive Fight Over the Next One

Case-by-case / verify locally

Longroad Energy's 243 MW El Campo Wind farm (67 turbines) has operated in Knox County since 2020 and is reported to contribute roughly $20 million in property taxes to Benjamin ISD, Knox County, and the county hospital district over the project. A second project, Innergex's 225.6 MW Griffin Trail Wind (Knox and Baylor Counties), is also built and has been fully operating since it reached financial close and commissioning in July 2021 -- CORRECTED 2026-09, this page previously described it as still proposed and seeking a roughly $6.6 million-per-year tax abatement, based on a stale, pre-construction 2019 article. Knox County is genuinely an active wind-energy county with two operating projects, not one operating and one pending. See the standalone wind-and-solar-leasing page for both projects' specifics.

Septic Permitting Most Likely Runs Through TCEQ Region 3 (Abilene)

Case-by-case / verify locally

No evidence found that Knox County holds TCEQ OSSF authorized-agent status. Knox County falls under TCEQ Region 3, headquartered in Abilene, so septic permit applications for unincorporated county land most likely route through that regional office -- confirm current forms, fees, and timelines directly before budgeting a system.

Water: a single district, created by a countywide-area vote

Groundwater in Knox County is managed entirely by the Rolling Plains Groundwater Conservation District, whose boundary is identical to Baylor, Haskell, and Knox Counties combined -- there's no split coverage or gap to check for here, unlike some Texas counties where part of the county falls outside any district. What's worth knowing about how RPGCD came to exist: it wasn't simply created by the Legislature and imposed top-down. Haskell and Knox County voters approved the district by election on January 27, 1999, and Baylor County joined a year later in 2000, making it a genuinely locally-initiated groundwater district rather than a purely legislative creation. RPGCD's rules govern well spacing (a general minimum horizontal separation between wells, with district rules distinguishing by well classification), registration, and production; confirm the district's current rules and any recent amendments directly before drilling a new well or relying on an existing one's permitted status.

Wind energy: a working project, and a live incentive question

Knox County is genuinely part of Texas's wind-energy build-out, not adjacent to it, and has two built, operating projects rather than one operating and one pending. Longroad Energy's El Campo Wind farm -- 67 Vestas V150-4.2 turbines (150-meter rotor diameter, 105-meter hub height) totaling 243 megawatts -- has been operating in the county since 2020, supported by corporate power-purchase agreements with DaVita (83 MW) and Crown Holdings (111 MW). Locally, the project has been reported to contribute close to $20 million in property tax revenue to Benjamin Independent School District, Knox County itself, and the county hospital district over its life, alongside roughly 200 construction-phase jobs. Separately, Innergex's Griffin Trail Wind project -- 225.6 MW across 80 turbines, spanning Knox and Baylor Counties -- reached financial close and full commissioning on July 26, 2021 and has been operating since; CORRECTED 2026-09, this page previously described it as still proposed and actively seeking a roughly $6.6 million-per-year county tax abatement, based on a December 2019 pre-construction article that is now nearly seven years stale. See the standalone wind-and-solar-leasing page for what both operating projects' structures can tell a landowner evaluating a lease offer of their own.

Septic and the agricultural economy

Knox County sits in TCEQ Region 3, based in Abilene, and this research found no indication the county has taken on TCEQ OSSF authorized-agent status, so plan on that regional office for septic permitting questions rather than a county department. On the land-use-context side, Knox County's economy has long been built around cotton and ranching: cotton acreage jumped from roughly 53,645 acres planted in 1919 to about 130,247 acres by 1930 as the crop came to dominate the local agricultural economy, and cattle, sheep, wheat, and grain sorghum remain part of the mix today alongside oil and gas extraction and, now, wind-lease income. Benjamin itself, the county seat with a population of roughly 247, has been a National Historic District since 1992 -- a small but real marker of the county's own preserved history worth knowing if a specific parcel sits in or near town.

What we could and couldn't confirm

RPGCD's exact three-county (Baylor/Haskell/Knox) footprint and its 1999 election-founding/2000 Baylor-addition history are drawn from the Texas Water Development Board's own management-plan documentation for the district. El Campo Wind's turbine count, model, capacity, and PPA details are drawn from NS Energy Business's project profile and Longroad Energy's own portfolio page; the roughly $20 million local-tax figure is drawn from broadcast news coverage (KTXS) of the project's construction announcement and was not independently cross-checked against an audited county or school-district financial document. CORRECTED 2026-09: this page previously described Griffin Trail Wind as a proposed project still seeking a roughly $6.6 million-per-year tax abatement, sourced to a Texas Public Policy Foundation article published December 6, 2019. Innergex's own press materials show the project actually reached financial close and full commissioning on July 26, 2021 and has been operating since -- the 2019 abatement-request framing was nearly seven years stale relative to this page's 2026-09 review, and is now corrected to reflect the project as built and operating. Cotton-acreage history is drawn from the Texas State Historical Association's county handbook entry.

Verify directly with: Rolling Plains Groundwater Conservation District directly for current well rules, the Knox County Commissioners Court for the current status of any wind-project tax abatement, TCEQ Region 3 (Abilene) for septic permitting, and the Knox County Appraisal District for how an existing or proposed wind lease affects a specific parcel's valuation

Who to Call Before Buying Land in Knox County

Knox County has no general zoning authority under Texas law, so there is no planning_zoning entry above; contact the Commissioners Court for subdivision and platting questions.

Wells / Private Water

Rolling Plains Groundwater Conservation District

Well registration, permitting, and spacing rules for any well in Baylor, Haskell, or Knox County.

Official website →

District Rules

Environmental Health

TCEQ Region 3 -- Abilene

On-site sewage facility (septic) permitting and other TCEQ environmental functions for Knox County, absent a confirmed local authorized agent.

Phone: (325) 698-9674Official website →

Assessor / Property Tax

Knox County Appraisal District

Assessed value, property tax, and agricultural (ag/wildlife) valuation questions for a specific parcel, including how an existing or proposed wind lease affects appraised value.

Phone: (940) 459-3891Official website →

Recorder / Clerk / Land Records

Knox County Clerk

Recorded deeds, easements, wind-lease agreements, and plat history for a specific parcel.

Official website →

Want to know if this specific parcel actually works?

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Topics Specific to Knox County

Wind and Solar Leasing in Knox County: El Campo Wind and What Comes Next →

Sources

District Overview / District Rules — Rolling Plains Groundwater Conservation District (accessed 2026-09)
2025 District Groundwater Management Plan — Rolling Plains Groundwater Conservation District (accessed 2026-09)
El Campo Wind Farm — NS Energy Business (accessed 2026-09)
El Campo Wind -- Knox County, Texas — Longroad Energy (accessed 2026-09)
Fighting to Keep the Lights On: Knox County — Texas Public Policy Foundation (accessed 2026-09)
Knox County, Texas: History, Geography, and Agriculture — Texas State Historical Association (accessed 2026-09)
Which TCEQ Region is My County In? — Texas Commission on Environmental Quality (TCEQ) (accessed 2026-09)
Knox County Appraisal District — Knox County Appraisal District (accessed 2026-09)

Last reviewed 2026-09