Land Drain Conversation Preparation Checklist

Look for straight lines or a branching pattern showing as greener, drier or differently coloured grass, which shows most clearly during a dry spell.

Old runs alter how the ground above them holds moisture, and the pattern appears and vanishes with the weather.

Keep any fragment of clay or plastic pipe turned up by earlier digging and note where it came from, rather than throwing it away.

A fragment with a location attached tells a professional far more than a description of something already discarded.

Record where a strip of stone, gravel or rubble shows at the surface in a line rather than as a patch.

A linear band of stone frequently marks a filled trench, and it is one of the few clues visible without disturbing anything.

Note any chamber, cover, pipe upstand or concrete surround in the ground that nobody uses and nobody can account for.

Leave it closed and photograph it in place; opening a chamber is work for a qualified drainage professional.

Walk the boundaries and look along any ditch bank for a pipe end discharging, or a stained opening where one appears to have discharged before.

What that outfall is and whether it may be used is for a qualified professional and the relevant authority or drainage undertaker to answer.

Note where the ground has settled into a shallow line, since a filled trench often shows itself long after the work was finished.

Settlement follows the trench rather than the pipe, but it points at the same place and is easy to photograph after rain.

Mark on a sketch every area that stays soft, spongy or waterlogged when the rest of the plot has firmed up.

The contrast between areas is the useful finding, and it is lost the moment somebody describes the whole plot as wet.

Note whether water seems to rise from below and sit in place, or to arrive across the surface from somewhere higher up.

The two behave differently and look different while it is raining, though they end up looking identical once the rain stops.

Record how each wet area behaves once rain has stopped, described in your own terms and always paired with the date you looked.

Comparative persistence between areas is what a professional can use, and it means nothing at all without a date attached.

Note where rushes, sedges, moss or other moisture-loving growth has taken hold, and how far that patch extends.

Vegetation records conditions across far longer than you have been watching, and it maps the wet ground for you.

Record any sour smell, iron-coloured staining or oily-looking film on standing water, and exactly where it appears.

Anything suggesting contamination or a foul discharge needs a suitably qualified specialist, with local confirmation of what applies.

Note where the ground will not take a mower, a barrow or foot traffic without damage, and how far that area reaches.

Ground that cannot be crossed shapes what any scheme could involve, since machinery has to reach the work somehow.

Note which ground around the plot sits higher, and whether the wet areas lie downhill of it or somewhere unrelated.

Position relative to higher ground frames every other observation and is quickly forgotten once attention moves to the wet patch itself.

Record whether neighbouring land, a track, a field or a road appears to shed water towards the plot, and where it crosses the boundary.

Water arriving from other land raises questions of responsibility for the relevant authority and, where needed, for a legal adviser.

Note how much of the water reaching a wet area comes off roofs, drives and paving rather than out of the ground itself.

Whether roof or surface water may be redirected is a drainage matter for a qualified professional and the relevant authority.

Go out during heavy rain, where it is safe to do so, and note the routes water actually takes across the surface of the plot.

Flow paths exist only while it rains, so they are absent from every observation made afterwards.

Note whether water ever leaves the plot and where, or whether it simply sits until it disappears where it fell.

This single question shapes the whole conversation and is surprisingly rarely answered before somebody is asked to advise.

Record any point where water appears to emerge from the ground itself, and whether it does so continuously or only after prolonged rain.

A seep that runs when nothing has fallen recently is a distinctly different observation from one that follows a downpour.

Mark on your sketch every ditch, channel, culvert entrance and pipe end around the boundary, including ones on the far side of it.

A boundary feature belonging to somebody else still affects your ground, and mapping it early avoids a late surprise.

Describe the condition of any ditch, including whether it holds water, appears silted, is overgrown or has been partly filled in.

Condition is observable and factual, whereas any conclusion about whether it works is not yours to reach.

Note where a ditch disappears into a pipe and where it reappears, since piped lengths are easily forgotten and rarely appear on anything written.

A culverted length is invisible to everybody except whoever remembers it, and that person tends to move away.

Record how the water level in a ditch behaves during heavy rain, including whether it appears to back up towards the plot.

What that behaviour means for your ground is for a qualified drainage professional to assess, not for you to conclude.

Ask the local authority or drainage undertaker who is responsible for maintaining each watercourse or culvert near the plot, and record what you are told.

Responsibility for watercourses varies by location and by feature, so confirm it with the responsible body rather than with neighbours.

Do not clear, deepen, divert or otherwise alter a ditch on the strength of your own observations.

Work to a watercourse may involve consents and responsibilities; confirm locally and involve a qualified professional first.

Go back through the paperwork from buying the property and note anything mentioning drainage, ditches, watercourses or responsibilities attached to the land.

Drainage obligations are sometimes recorded in purchase paperwork and then never looked at again by anybody.

Write down anything a previous owner told you about wet ground, drainage work or where water used to go, in the words they used.

Their account is a lead rather than a fact, but it points a professional at where to look.

Ask neighbours what they remember about drainage in the area, including work carried out on adjoining land, and record each account separately.

Neighbours often hold the only surviving knowledge of a run, and separate accounts can be compared where they disagree.

Note whether the land was farmed or open ground before the property was built, since agricultural drainage often survives beneath gardens.

Old field systems continue working, partly working or blocking long after the field they served has gone.

Ask what happened to the ground during construction if the property is relatively recent, including where spoil went and where site traffic ran.

Ground compacted by construction traffic behaves nothing like the ground beside it, and the effect outlasts everybody who remembers it.

Record any earlier attempt to deal with the wet ground, what was done, roughly where, and whether it changed anything.

A previous attempt is both a clue to what is buried and a warning about what may not work here.

Bring together your dated observations into one record rather than a collection of notes, photographs and recollections in different places.

Scattered evidence is usually skimmed, whereas an organised record gets read and asked about.

Provide photographs of the same areas in wet conditions and in dry ones, taken from the same positions.

A single set from the worst conditions makes everything look permanent and removes the comparison that makes the set useful.

Prepare one plan of the plot carrying the wet areas, the suspected lines, the boundary features and the outfalls together.

Relationships between features are visible on a drawing and invisible in a list, however carefully the list is written.

Note what access exists for people and machinery, including gate openings, side passages, overhead branches and anything that would have to be moved.

Access frequently determines what can be considered at all, and it is easier to establish before rather than during a visit.

List the trees, planting, structures and surfaces you would want protected, and note which of them you would not accept losing.

Work near trees can involve protections and consents; confirm locally what applies and involve a qualified arboricultural professional.

Gather whatever is known about buried services crossing the plot and hand it over before anybody proposes opening ground anywhere.

Establishing what is buried here is a matter for qualified professionals with the right equipment, before any excavation is contemplated.

Write down what you want each wet area to be usable for, in plain terms such as walking on, mowing, planting or leaving alone.

Intended use governs what any professional would consider, and it is the question owners most often answer vaguely.

Decide and record what degree of change would be enough for you, since wet ground is often improved rather than eliminated.

Setting this expectation early avoids the disappointment that follows an unstated assumption of a perfectly dry garden.

List the parts of the plot that you want left undisturbed regardless of what is proposed, and the reasons for each.

Constraints stated in advance are worked around; constraints raised once work is under way become difficult arguments.

Consider how much disruption you are prepared to accept and where excavated material could realistically go on or off the plot.

How excavated material may be handled or removed is a matter to confirm locally and with a qualified professional.

Decide whether a conversation with a neighbour is needed before anything is discussed, particularly where water crosses a boundary either way.

Anything affecting water crossing a boundary involves other parties; ask the relevant authority and, where appropriate, a legal adviser.

Agree in writing who in the household makes drainage decisions, and how each answer received will be recorded.

Drainage conversations run over a long stretch with several parties, and unrecorded answers get remembered differently by everybody.