Stock tank vs. pond — what's the difference?
In Texas, "stock tank" and "pond" are often used interchangeably, but there's a practical distinction. A stock tank is typically a smaller, earthen-dam impoundment built primarily to water livestock — usually less than an acre of surface water. A pond generally implies a larger, deeper water body designed for fishing, wildlife, recreation, or aesthetics, though it may also serve livestock.
For the purposes of this guide, we're covering both — the build process, costs, and considerations are similar. The main variables are size, depth, and intended use.
Site selection — the most important decision
Where you build matters more than almost anything else. A poorly sited stock tank will leak, fill with silt, or never hold water. Get this right first.
- Watershed area. Your tank needs a watershed — land that drains runoff into the impoundment. A general rule of thumb is 25–100 acres of watershed per surface acre of water, depending on annual rainfall. In South Texas (18–24" annual rainfall), you need more watershed per acre of pond than in East Texas.
- Soil type. Clay-heavy soil holds water. Sandy or rocky soil will not. Before spending money on earthwork, dig a few test holes in your proposed site and examine the soil. Red and gray clay is ideal. Sandy loam or caliche will require bentonite treatment or a pond liner, significantly increasing cost.
- Natural drainage. Site your tank where water already wants to go — a natural draw, low spot, or creek bottom. Don't fight topography.
- Depth. South Texas heat will evaporate shallow water quickly. Design for a minimum average depth of 8–10 feet. Shallow tanks lose water fast in summer and encourage aquatic vegetation overgrowth.
- Location relative to use. For deer and wildlife, position near natural travel corridors. For fishing or recreation, consider access from the house or road. For livestock, proximity to pastures matters.
Permits — what you need in Texas
Texas has relatively landowner-friendly water law, but permits are required in some situations. Here's the breakdown:
Stock tank under 200 acre-feet — no state permit required
Most small to medium stock tanks on private land fall under this threshold. You do not need a Texas Commission on Environmental Quality (TCEQ) permit to impound water for livestock or wildlife use on your own property, provided the impoundment is below 200 acre-feet capacity.
Navigable waterway involvement — permit required
If your tank involves altering, damming, or diverting water from a navigable stream or river, you'll need a permit from the TCEQ and potentially the U.S. Army Corps of Engineers. Most rural stock tanks on small drainages don't trigger this.
404 wetlands permit
If your site involves filling or altering jurisdictional wetlands, a U.S. Army Corps of Engineers Section 404 permit may be required. A consultant or your county NRCS office can help you determine if wetlands are present.
USDA NRCS programs
The Natural Resources Conservation Service (NRCS) offers cost-share programs — including the Environmental Quality Incentives Program (EQIP) — that can cover 50–75% of stock tank construction costs on qualifying properties. Apply before you build. These programs have application windows and waitlists.
Cost — what to expect
Stock tank and pond construction costs vary significantly based on size, soil conditions, depth, and your location in Texas. These are rough ranges based on current South and Central Texas market rates:
Typical cost ranges (2024–2025)
Costs vary significantly by location, contractor, fuel prices, and soil conditions. Get at least 2–3 bids.
The build process — what actually happens
- Site evaluation. Walk the site with a contractor or NRCS engineer. Confirm watershed, soil type, and feasibility before spending money on plans.
- Design and layout. Stake the dam location, spillway, and impoundment area. Determine dam height, width, and freeboard (extra height above max water level). A proper spillway design is critical — an undersized spillway is a dam failure waiting to happen.
- Clearing. Remove trees and brush from the dam footprint and pond basin. Roots under a dam cause seepage and eventual failure.
- Excavation and dam construction. The dozer or scraper operator pushes and compacts clay soil to build the dam. The basin may be deepened by pushing soil to the dam. Compaction of the dam core is critical — this is not a job for loose fill.
- Spillway installation. A concrete or corrugated metal pipe spillway controls the water level and safely passes overflow. Don't skip this.
- Wait for rain. The tank fills with runoff — you cannot rush this. In South Texas, it may take one season or multiple rain events to fill depending on watershed size.
- Stocking. Once the tank holds water for 60–90 days with stable water quality, stock fish according to your goals. Contact TPWD for stocking recommendations.
Stock tanks and wildlife exemption compliance
A stock tank or pond counts as supplemental water — one of the seven approved wildlife management practices. Once built, document it with photos and note it in your annual compliance records. It also supports other practices: deer, turkey, and quail will use the water source, increasing census count opportunities and overall habitat quality.
Bottom line
A well-sited, properly built stock tank is one of the most durable improvements you can make to a Texas property. It adds wildlife value, fishing, water for livestock if needed, and a permanent feature that appreciates the land.
Don't cut corners on soil evaluation or spillway design. Get multiple bids. Check with NRCS before you start — free cost-share money is available and many landowners don't know to ask. And build deeper than you think you need, especially in South Texas where summer evaporation is relentless.