Irrigation Well and Water Source Planning in West Texas: What Every Farmer Needs to Know

# Irrigation Well and Water Source Planning in West Texas: What Every Farmer Needs to Know

Your irrigation system is only as good as the water feeding it. Pro-Tech Irrigation has spent 25 years helping farmers across the Texas Panhandle, West Texas, and the South Plains evaluate, plan, and optimize their water sources -- and we see the same mistakes repeated on operations that skip this critical step.

Whether you are drilling a new well in Lubbock County, evaluating an existing well that is losing capacity, or trying to figure out the right pump and pivot combination for your water table depth, this guide covers what matters.

Why Water Source Planning Comes Before Equipment Decisions

Too many operations in West Texas buy a center pivot or upgrade their irrigation system without first understanding what their water source can actually deliver. The result is a mismatch: a pivot designed for 800 gallons per minute connected to a well that tests at 500 GPM. That mismatch means uneven application, stressed crops, wasted energy, and a system that never performs to its potential.

Pro-Tech Irrigation always starts with the water source. Before we recommend any equipment, we evaluate:

• • Well depth and static water level
• • Pump test flow rate (gallons per minute)
• • Water quality (mineral content, pH, sediment)
• • Aquifer recharge rate and long-term sustainability
• • Seasonal water level fluctuations
• • Proximity to other high-capacity wells on neighboring operations

This data drives every decision downstream -- pivot sizing, nozzle selection, application rate, and energy costs.

Understanding the Ogallala Aquifer Situation in the Texas Panhandle

Most irrigation wells in the Texas Panhandle and West Texas draw from the Ogallala Aquifer, and the reality is straightforward: water levels have been declining for decades. According to the Texas Water Development Board, some areas of the Panhandle have seen saturated thickness reductions of 30 to 50 percent since large-scale irrigation began in the 1950s.

What this means for farmers today:

• • Wells drilled 20 or 30 years ago may not produce what they used to. A well that tested at 700 GPM in 2000 might only deliver 400 GPM today. If your irrigation system was designed for the original flow rate, you are running an inefficient operation.
• • New wells require careful placement. Well spacing matters more now than it did a generation ago. Drilling too close to existing wells can cause interference and accelerate drawdown for everyone.
• • Water quality can change as levels drop. As the saturated thickness decreases, mineral concentrations can increase. This affects crop tolerance and can cause scaling in pivot systems.
• • Conservation is not optional -- it is economic survival. Every gallon wasted is a gallon that will not be available next season or next decade.

Pro-Tech Irrigation works with farmers across Lubbock, Hale, Lamb, Floyd, Swisher, and surrounding counties to develop water management plans that account for current aquifer conditions, not the conditions from the last time the well was drilled.

What Goes Into Planning a New Irrigation Well

Site Selection and Hydrogeological Assessment

Well placement is not random. The best location considers:

• • Aquifer thickness at the proposed site. Thicker saturated zones produce more water and sustain production longer.
• • Distance from existing wells. In the Texas Panhandle, well spacing of at least a quarter mile is generally recommended to avoid interference, though some groundwater conservation districts have specific minimum spacing requirements.
• • Soil characteristics and surface drainage. The well should be accessible for maintenance and located where the pump station can efficiently feed the irrigation system.
• • Proximity to the field center. For center pivot operations, the well ideally sits at or near the pivot point to minimize mainline pipe runs and friction losses.

Well Drilling and Construction

Irrigation wells in West Texas typically range from 200 to 600 feet deep depending on the local aquifer depth. Key specifications include:

| Component | Typical Range | |---|---| | Well depth | 200 - 600 feet | | Casing diameter | 10 - 16 inches | | Screen length | 40 - 200 feet (matched to saturated zone) | | Target flow rate | 300 - 1,000+ GPM | | Drilling cost | $30 - $60 per foot (varies by depth and conditions) | | Total well cost (drilled, cased, developed) | $15,000 - $50,000+ |

Well construction quality directly affects long-term performance. A properly screened and developed well that matches the aquifer geology will outperform a cheaply constructed well for decades.

Pump Testing and Flow Rate Verification

After drilling, a proper pump test is essential -- not a quick 30-minute check, but a sustained test that reveals how the well performs under continuous irrigation demand. Pro-Tech Irrigation recommends:

• • 24-hour pump test minimum for new irrigation wells
• • Static water level measurement before and after pumping
• • Drawdown rate monitoring to determine sustainable yield
• • Water quality sampling during the test (not just at startup)
• • Recovery rate measurement after pumping stops

The pump test data determines the right pump size, motor horsepower, and column pipe configuration. It also establishes the baseline for monitoring well performance over time.

Evaluating an Existing Well That Is Losing Capacity

Many farmers in the Texas Panhandle are not drilling new wells -- they are dealing with existing wells that are not producing what they used to. Common signs of declining well capacity:

• • Pivot runs are taking longer to complete a rotation
• • Pressure at the end gun or last drive unit has dropped
• • Sand or sediment is showing up in the water
• • Energy costs have increased for the same acres irrigated
• • Neighboring wells are reporting similar declines

Pro-Tech Irrigation performs well evaluations that include flow rate testing, water level measurement, and a comparison against original well records. In some cases, well rehabilitation (cleaning, re-screening, or re-developing) can restore a significant portion of lost capacity. In other cases, the aquifer conditions have changed and the operation needs to adapt -- either with a new well, a different irrigation system, or a shift in cropping strategy.

Matching Your Water Source to Your Irrigation System

The connection between water supply and irrigation equipment is where Pro-Tech Irrigation adds the most value. Here is how water source characteristics drive system design:

Low-Flow Wells (Under 400 GPM)

Operations pulling less than 400 GPM have several options:

• • Subsurface drip irrigation (SDI) -- the most efficient option for low-flow situations, applying water directly to the root zone with minimal losses
• • Low-pressure center pivots with LEPA or LESA nozzles -- designed specifically for low-flow conditions common in depleted aquifer areas
• • Reduced-acreage pivots -- running a smaller circle that the well can adequately supply rather than under-watering a larger area

Medium-Flow Wells (400 - 700 GPM)

This is the most common range for Texas Panhandle operations today. A properly designed center pivot with the right nozzle package and pressure regulation can irrigate a standard quarter section effectively at these flow rates.

High-Flow Wells (700+ GPM)

Higher-capacity wells provide flexibility for larger pivots, higher application rates, and faster rotation times. However, high-flow wells also pump down the aquifer faster. Pro-Tech Irrigation helps farmers with high-capacity wells develop conservation strategies that protect long-term water availability.

Water Quality and Its Impact on Irrigation Equipment

West Texas groundwater is not all the same. Mineral content, pH, and sediment levels vary significantly across the Panhandle and affect both crop performance and equipment longevity.

Common water quality issues in the region:

• • High calcium carbonate -- causes nozzle clogging and scale buildup in pivot systems
• • Elevated chlorides or sodium -- can damage salt-sensitive crops and degrade soil structure over time
• • Sand and sediment -- accelerates wear on pumps, nozzles, and moving parts
• • Iron and manganese -- causes staining and biological buildup in drip systems

Water quality testing should be part of every well evaluation. The results influence nozzle material selection, filtration requirements, and in some cases, crop selection for specific fields.

Working With Groundwater Conservation Districts

Most of the Texas Panhandle falls under local groundwater conservation districts that regulate well spacing, drilling permits, and in some cases, pumping volumes. Farmers planning new wells or major system changes should work with their local district early in the planning process.

Pro-Tech Irrigation has relationships with conservation districts across the region and helps farmers navigate the permitting process while ensuring their irrigation plans comply with local regulations.

Frequently Asked Questions

How much does it cost to drill an irrigation well in the Texas Panhandle?

Drilling costs in the Texas Panhandle typically range from $30 to $60 per foot, depending on depth, geology, and casing requirements. A complete irrigation well including drilling, casing, screening, development, and pump installation generally runs $15,000 to $50,000 or more for deeper wells.

How do I know if my existing well is losing capacity?

The clearest signs are longer pivot run times, reduced end-gun pressure, increased energy costs for the same irrigated acres, and sand in the water. A professional pump test compared against original well records gives you a definitive answer.

Can I rehabilitate an old well instead of drilling a new one?

In many cases, yes. Well rehabilitation techniques including chemical treatment, re-screening, and mechanical development can restore flow rates. Pro-Tech Irrigation evaluates whether rehab or a new well makes more economic sense for each specific situation.

How far apart should irrigation wells be spaced?

Local groundwater conservation districts typically set minimum spacing requirements, but a general guideline in the Texas Panhandle is at least a quarter mile between high-capacity irrigation wells. Closer spacing accelerates drawdown and reduces sustainable yield for all nearby wells.

What water quality tests should I run on a new irrigation well?

At minimum, test for pH, electrical conductivity (salinity), calcium, magnesium, sodium, chlorides, bicarbonates, iron, and total dissolved solids. These results determine crop compatibility, nozzle and filtration requirements, and long-term soil health impacts.

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Call Pro-Tech Irrigation at (214) 264-4793 to schedule your farm analysis and water source evaluation. Serving the Texas Panhandle, West Texas, and the South Plains with 25 years of agricultural irrigation expertise.