Eldoraigne sits on the dolomite belt that runs through Centurion, with the same cavity-controlled yields and the same chert bands that slow a rig.
Established stands here are generously sized, which helps with siting more than it helps with predicting what a hole will produce.
What Is Under Eldoraigne
| Formation | Where it sits | What it means for drilling |
|---|---|---|
| Malmani Subgroup dolomite | The bedrock beneath most of the suburb, part of the Chuniespoort Group | Water here occupies solution channels and widened fractures rather than the rock mass, which is why two holes on the same street can return very different yields. |
| Chert and chert breccia | Bands within the dolomite and residual rubble above it | Among the hardest material drilled anywhere in the metro. Chert-rich horizons cost time and consumables, and their position is only established once drilling starts. |
| Wad and residual soil | The leached mantle between the soil and dolomite bedrock | A leached, compressible horizon whose depth varies across a single stand. Casing through it is a requirement rather than an option. |
Send your street and what the water is for, and get an itemised quote for Eldoraigne.
Get a Eldoraigne Borehole QuoteWhat That Means for Your Borehole
- Yields are the least predictable in the city high where a solution cavity is intersected, disappointing a stand away.
- Casing through the wad horizon is not optional and its thickness is unknown until drilling starts.
- Loss of circulation is common when a cavity is opened, and the rig has to be equipped for it.
Where We Work Around Eldoraigne
- Eldoraigne proper and the older streets
- Eldoraigne Extension stands
- Wierdapark boundary
- Rooihuiskraal approaches
- Bronberrik side
- Complexes and cluster developments
- Schools and church grounds in the area
What to Watch For Here
Large mature gardens set the demand. Eldoraigne stands carry substantial established planting, and the water requirement peaks in the dry months from June through to the first rains. A borehole with a modest sustainable yield still covers that comfortably once storage is sized for the peak rather than the average.
Mature trees complicate rig access. The same established planting that creates the demand also limits where a truck-mounted rig can reach and set up. It is usually solvable, but it is worth establishing on a site visit before a position is committed to.
What the Water Is Used For
- Irrigation over the long dry season before the summer rains
- Topping up the pool, subject to what the analysis says
- Keeping water on the property through supply outages
- Cutting the volume bought from the metro each month
- Shared landscaping in sectional-title schemes
Wellpoint or Borehole?
Not possible on this ground. Driven points rely on loose, permeable material within about seven metres of surface. Dolomite and its chert rubble stop a point immediately, and the water sits far deeper than a surface pump can lift it.
Registration and Abstraction
A completed borehole here should be registered with the City of Tshwane, and the responsibility for that sits with the property owner rather than with the driller. Separately, the National Water Act governs how much you may abstract: reasonable domestic use and small-scale gardening generally fall under Schedule 1, while larger, agricultural or commercial abstraction may require registration or a water use authorisation from the Department of Water and Sanitation. The position on domestic registration was being actively revised during 2026, so confirm your obligations before drilling rather than afterwards.
Dolomitic ground carries an extra requirement. SANS 1936 governs what may be built on it, and the Council for Geoscience holds the stability records the metro works from, which means approvals can be needed before drilling starts rather than after. It is worth checking at the planning stage, since it can move dates rather than just add forms.
Related Services
For the drilling process itself, the geology across the wider metro and how a quote is put together, see Borehole Drilling Pretoria.
Borehole Prices in This Area
Drilling is charged per metre, so depth drives the total. The ranges below are framed for local ground conditions and access.
| Item | Indicative range | What moves it locally |
|---|---|---|
| Drilling, per metre | R500 - R1,200 /m | The range is wide here for two reasons: chert horizons cut the penetration rate sharply, and a cavity can force a second hole. |
| uPVC casing, installed, per metre | R400 - R700 /m | Set by diameter and class, and by how much wad has to be cased through. That thickness is found during drilling, not before it. |
| Mobilisation and site establishment | R2,500 - R9,000 | Access and site conditions move this; a site visit settles it before quoting. |
| Water survey | R5,000 - R12,000 | Targets structure rather than depth. Worth most where yield is fracture-dependent. |
| Yield testing | R3,500 - R15,000 | Establishes the sustainable rate that pump selection depends on. |
| Pump, supplied and installed | R15,000 - R45,000 | Greater depth means more head, which means a larger pump and heavier cable. |
| Storage and booster | R12,000 - R35,000 | Needed wherever peak demand exceeds the borehole's sustainable rate. |
| Typical complete project | R70,000 - R200,000+ | Everything above, excluding treatment, which depends entirely on the water analysis. |
These are indicative ranges, not a quotation. They are compiled from published South African supplier and contractor pricing to give you a starting point for budgeting. They are not our rate card, and no figure here is a commitment.
Treat them as a broad guide only. Published borehole pricing in South Africa varies enormously - 2026 guides quote per-metre drilling rates for Gauteng ranging from under R300/m to R1,500/m, a spread of more than five to one - because depth, geology, access, specification, distance and fuel costs all move the number. Depth in particular is not known until the hole is finished. Figures generally exclude VAT unless noted, and change over time. Only an itemised written quote against your actual site means anything.
Eldoraigne Borehole FAQs
What sort of yield can I expect in Eldoraigne?
It depends entirely on whether the hole intersects a water-bearing cavity or fracture in the dolomite, and that cannot be established until it has been drilled and tested.
What can be said is that dolomite is the strongest aquifer in the region, so the upside here is better than on the shale ground east of the city, with more variability to go with it.
How long does drilling take in Eldoraigne?
Usually a day or two for the drilling itself, though chert bands can slow that considerably and cavity handling adds time.
The full sequence including casing, development, yield testing and pump installation runs longer, and yield testing in particular should not be rushed because pump selection depends on it.
Will a borehole in Eldoraigne cover a large garden?
Usually, provided the system is designed around the tested sustainable yield rather than the peak flow the borehole can briefly deliver.
Storage is what makes that work. A tank lets a modest continuous yield accumulate overnight and meet a heavy irrigation demand in a short window.
Is the water in Eldoraigne hard?
Dolomite water is typically hard, because dissolved calcium and magnesium carbonate is what the aquifer is made of. That commonly shows up as scale in kettles, geysers and irrigation fittings.
It is a treatable characteristic rather than a safety issue, but it should be confirmed by a laboratory analysis rather than assumed, since hardness varies.
DRILLING IN ELDORAIGNE?
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