Farm Pond Construction: Size, Digging Method and Which Machine to Use

What size should a farm pond be?

Size a farm pond from two things: how much water your catchment will send into it, and how much you need to store. The catchment is the land that drains toward the pond. CRIDA’s figures for black soils put runoff at about 10 to 20 per cent of the rain that falls, depending on the research station and how deep the soil is.

The arithmetic is short. One hectare (2.47 acres) of catchment that gets 700 mm of rain in a season, with 10 per cent running off, sends 10,000 m² × 0.7 m × 0.10 = 700 m³ of water toward the pond. A pond much bigger than that will rarely fill. One much smaller will overflow early and waste the rest.

Once you know the capacity, CRIDA’s table gives the dimensions. These are square ponds with a 1.5:1 side slope, the slope the book recommends for the murrum (weathered rock and gravel) under deep black soils.

Source: CRIDA and ICRISAT (2010), Table 2 of the chapter on dugout farm ponds in deep black soils of the Deccan plateau. Side slope 1.5:1 throughout.

Read the table across a row and one thing stands out. Going deeper saves land. A 1,000 m³ pond 2 m deep has a top of 25.2 m × 25.2 m, about 635 m² of field gone under water. Dug 3 m deep, the top shrinks to 22.2 m × 22.2 m, about 493 m². That is roughly 140 m² of crop land saved, and a smaller water surface also loses less to evaporation. CRIDA also prefers the square over a long rectangle for the same reason: less surface and less wetted side for the same storage.

Depth has a limit, though, and the limit is usually the machine. That is the next question.

Which machine is used for farm pond digging?

A backhoe loader, the machine most villages call a JCB, digs most farm ponds in India, and on a normal excavated pond it can do the whole job alone. In a 2005 to 2006 study in Indore district of Madhya Pradesh, reported in the CRIDA book, eight ponds holding between 2,396 m³ and 7,458 m³ were built in farmers’ fields. Backhoe loaders worked on all eight. A bulldozer was used on only two, to set the boundary and build the earthen embankment, and the study concluded that bulldozers are not needed for a plain excavated pond.

The right machine still depends on the pond. The table uses the specifications listed for every backhoe loader, mini excavator and small excavator in our catalogue, counting only machines whose two spec records agree.

A useful check before you hire: the machine’s listed maximum digging depth should be comfortably more than the pond depth, because a machine reaches its full depth only close in, below the boom, while much of a pond floor lies metres out from where it stands. The JCB 3DX lists 4.77 m and a 0.26 m³ bucket, which handles a 3 m pond with room to spare. The JCB 2DX, a smaller backhoe, lists 3.02 m, the shallowest of the 48, so it suits ponds of 2 to 2.5 m. Among mini excavators the SANY SY35U lists 3.105 m with a 0.12 m³ bucket at 3,780 kg, and the 2,300 kg Tata Hitachi TMX 20 Neo lists 2.323 m, enough for the 1 to 1.5 m lined ponds used in the hills. In the 8-tonne class the SANY SY80C-9 lists 4.02 m and a 0.32 m³ bucket. All figures are as per the listed specifications in November 2026.

Choosing between a backhoe and an excavator for other work as well? The trade-offs are laid out in backhoe vs excavator, and how the backhoe’s own bucket and reach are measured is in the guide to backhoe bucket capacity and reach.

How long does it take to dig a farm pond?

Count the bucket loads first, because that is the honest measure of the job. Time follows from it.

Take the 1,000 m³ pond, 3 m deep, from the table. Worked out exactly for a pit with sloping sides, the earth removed is about 960 m³. CRIDA’s figure of 1,000 m³ averages the top and bottom areas, which slightly overstates a sloped pit. Divide by the bucket size:

Our own arithmetic: 960 ÷ bucket size, rounded. A listed bucket size assumes a full bucket. Sticky black soil, hard murrum or loose sand will fill it less, so treat these as the lowest possible counts.

To turn buckets into hours, time your operator. Count ten full digging cycles on your soil, from bucket in the ground to bucket back in the ground, and divide the seconds by ten. Then hours = buckets × seconds per cycle ÷ 3,600. If the cycle comes out at 30 seconds, 3,700 buckets is about 31 hours of digging. Trimming the slopes, building the bunds and the inlet and outlet come on top of that, and a machine that must also load trolleys works slower than one dumping beside the pit.

This is also why mini excavators make sense only on small ponds. Eight thousand cycles is a long time on a pond a backhoe would finish in under half the count.

How is a farm pond constructed step by step?

The CRIDA chapter on dugout ponds lays the work out in this order, and it holds whether the digging is by hand, backhoe or excavator.

1. Choose the site. It should sit where field runoff already collects, on one side of the natural watercourse rather than in it, so silt does not pour straight in. Where black and red soils meet, put the pond in the deep black soil, which holds water without a lining. Avoid shale, basalt and shattered rock below, which leak.
2. Clear about 20 m around the marked area: bushes, stumps, thorns and roots.
3. Plough and harrow the patch level, so the earthwork can be measured. On very uneven land, take levels on a 5 m or 10 m grid.
4. Mark the four corners with pegs, and set a reference level on a fixed object 15 to 20 m away so depth can be checked all through the job.
5. Dig in steps. Nobody cuts a perfect sloped pit in one pass, so the pit is dug as a series of steps and the steps are trimmed back to the design slope at the end. With a machine, the operator works down from a ramp and keeps checking the side slope.
6. Shape the dug soil into a spoil bank, a shoulder bund and a toe drain (next section), and build the silt trap, inlet and outlet before the rains.

The side slope matters more than most owners think. CRIDA notes that standing water softens the sides over time, so a slope that stands up dry can slip once the pond is full. A pond dug steeper than its soil allows slowly loses its sides into its own bottom.

Figure 1: Cross-section of a dugout farm pond

Parts shown in Figure 1 (dimensions are the 1,000 m³, 3 m deep pond from the table; not to scale):

1. Runoff from the field and the watercourse.
2. Silt trap, a small pit dug in the watercourse just before the inlet, about 0.75 to 1 m deep with 1:1 sides, slightly longer than the channel is wide. It catches sand and soil before they reach the pond.
3. Inlet, built as a chute so water drops into the pond without cutting the side.
4. The pond: sloped sides, flat bottom.
5. Outlet, set a little lower than the inlet, to let surplus water leave safely.
6. Spoil bank, the dug soil, set back from the edge on a strip of level ground called the berm.
7. Shoulder bund and toe drain, a low bund with a small drain along it, so rain falling on the spoil bank does not wash back into the pond.

Dugout pond or embankment pond: which suits your land?

A dugout pond, also called an excavated pond, is dug into flat or gently sloping land and stores water below ground level. An excavated-cum-embankment pond is built in a gully or a low wasteland corner: some earth is dug out, and an earthen embankment is thrown across the gully to hold water above the old ground level as well.

The Indore study tried both. Seven of the eight ponds were dugout ponds on cultivated land, and they needed no built inlet or outlet because they sat on natural drainage lines, so water came in across their full width. The one embankment pond, 206 m long in a gullied waste patch, held 7,458 m³ and needed a proper outlet. The team used a gabion there, a wire cage packed with stones, because concrete outlets in black clay soil had cracked and shifted as the soil swelled and shrank. Per cubic metre stored it was among the cheapest of the eight, and the study advised giving gullied sites priority for that reason.

So the land decides. A gully you cannot farm is the cheapest place to store water, but it needs a bulldozer for the embankment and a sound outlet. Flat cultivated land takes a plain dugout pond, and a backhoe loader alone can make it. The same study found a backhoe can cut a circular pond too, a shape it says has a geometric advantage over the others.

Where should the dug soil go?

A 1,000 m³ pond produces about 960 m³ of soil and murrum, and loose earth takes up more room than it did in the ground. Plan where it goes before the machine arrives, or it ends up in a heap on your best land.

CRIDA’s guidance is practical. Use the murrum to strengthen the farm’s existing bunds and internal farm roads, put a bund around the pond, and spread the excess thinly on the field to lose as little crop area as possible. Selling murrum for rural roads was once expected to recover around 40 per cent of the construction cost, but the book notes that idea did not catch on with the agencies involved.

The backhoe loader has an edge here. Its front loader bucket can carry and spread the spoil itself, so one machine digs and shapes. An excavator dumps beside the pit and needs tractor trolleys, a tipper or dumper or a dozer to move the soil any distance. For farm roads, the spoil from a single pond can be enough to raise a track across a wet field.

Looking at machines for pond and land work? Compare listed backhoe loader models and their digging depths, and talk to a verified dealer before you book or buy.

Does a farm pond need lining?

A farm pond in deep black soil usually holds water without a lining, while one in red soil, sandy soil or over broken rock usually needs one. The CRIDA book puts it plainly for the black soils: site the pond in deep black soil to avoid lining. On the red sandy loam of its own research farm near Hyderabad, it calls seepage from ponds a major problem. Seepage figures it quotes from ponding tests in the United States show the gap: about 7 cm of water lost a day in clayey soil against 48 cm a day in sandy soil.

What to line with depends on who you ask and where, and the book records the disagreement honestly:

• On red soil in Telangana, a pond lined with 150 micron black HDPE film worked at first and was seeping heavily by its fourth year. Soil-cement and asphalt linings did worse. Brick lining with cement plaster held up best and was recommended for that region.
• Researchers from IIT Delhi argue the other way for larger works: cement and concrete linings crack when the ground beneath settles, and the old practice of 150 to 200 micron LDPE (low-density polyethylene) sheet fails because thin sheet gets punctured while it is laid. They favour thicker geomembranes that stretch with the ground.
• In the Uttarakhand hills, a single piece of 0.25 mm LDPE sheet worked well in ponds kept to 1 to 1.5 m deep with 1:1 sides, laid on a 5 cm mud plaster and covered with a mud and straw layer, 10 cm on the sides and 15 cm on the floor.

Whatever the lining, it changes the digging brief. A pond that will be lined needs smooth, even sides with no sharp stones or roots left in them, so the operator has to trim more carefully, and that is where a mini excavator’s smaller bucket earns its place.

How do you keep a farm pond working?

A farm pond fills with silt, and silt means the machine comes back. CRIDA measured ponds in deep black soils silting at 5 to 6 tonnes per hectare every year. It suggests desilting a drinking water pond about every 2 years and an irrigation pond every 5 to 10 years, depending on how fast the storage shrinks. The same backhoe or excavator does that job, and how it is planned is covered in the guide to dredging and desilting.

The rest is routine. Empty the silt trap whenever it fills after a few storms. Plug breaches and rills in the spoil bank and shoulder bund straight away, and keep the toe drain clear. In black soil, set any concrete inlet or outlet on a firm murrum base, because the soil’s swelling and shrinking breaks structures sitting directly on it.

Fence the pond. The book recommends 4 to 5 strands of barbed wire around it to keep people and cattle out. A pond with smooth plastic-lined sides is especially hard to climb out of.

Where farm ponds fit in land development work

Farm ponds are one part of the wider land development work machines do on farms, alongside levelling, bunding and farm roads. The machines, models and state schemes behind that work are collected on the farm and land development page. More industry-by-industry guides sit in the heavy equipment guide.

If you are buying a machine to dig ponds for others in your area, the depth figures in this guide are the first filter, and construction equipment finance options are worth checking at the same time. Browse mini excavators and backhoe loaders side by side and ask a verified dealer for a demonstration on your own soil.

Sources

Pond dimensions, side slopes, site selection, construction steps, silt trap, inlet and outlet, spoil handling, siltation, desilting and fencing are from the chapter on dugout farm ponds in deep black soils of the Deccan plateau; the Indore case study is D.H. Ranade’s chapter on water harvesting tanks in the black soils of the Malwa region; lining experience is from the chapters by B.L. Deopura and B.R. Chahar (IIT Delhi), on farm pond lining in the Alfisols of Telangana, and on hill ponds in Uttarakhand. All are in K.V. Rao, B. Venkateswarlu and others (eds), Rainwater Harvesting and Reuse through Farm Ponds: Experiences, Issues and Strategies, CRIDA and ICRISAT, 2010 (ICAR-CRIDA publication, PDF), read on 4 November 2026. Machine figures are from the listed specifications of 51 backhoe loaders, 49 mini excavators and 46 small excavators in November 2026; machines whose two spec records disagree were left out of the ranges. Bucket counts are our own arithmetic.

Prices, specifications and features are indicative, vary by variant, location and date, and should always be confirmed with the official OEM or authorised dealer before any purchase decision. DesiMachines is not liable for decisions taken on the basis of information that may have changed after publication.