Expert Evidence Centre

Start with the thing this page does not do. It names no expert, quotes no expert and attributes no opinion to anyone, because no expert has been instructed. Publishing a list of impressive names we have merely approached, or a summary of what an unnamed specialist is said to think, would be the exact failure this site is built to avoid — and it would be the easiest thing in the world to discredit.

What we can publish honestly is the specification: which disciplines this application touches, the precise question each one has to answer, and the standards any report we commission will have to meet before it appears here. That specification is useful now. It tells a reader what a properly tested application would look like, and it makes it obvious which of those tests has actually been done.

Thirteen disciplines. Zero instructed. Every one of the questions below is currently unanswered on the public record.

The thirteen disciplines, and what each must answer

1 · Wastewater engineering

Can a system be designed, built and operated to collect, treat and dispose of approximately one million litres a day, every day, on its worst day as well as its average one — and what is its nutrient-removal performance as a design value and as a consented limit?

2 · Hydrogeology

Where does water that passes below the root zone at the Morven Hill disposal area actually go? What is the depth to groundwater and how does it vary seasonally, which way does the groundwater move, how fast, and what bores, springs and surface waters lie downgradient?

3 · Nitrogen and nutrient science

Which of the four nitrogen quantities does the 2.8 tonnes a year figure describe — the load entering the plant, the load remaining in treated effluent, the load applied to land, or the load predicted to reach groundwater or surface water? And what is the phosphorus load at each of those four stages, which the application material does not quantify at all?

4 · Land-treatment and soil science

What nitrogen loading rate per hectare per year can this specific ground accept without leaching — given its soil type, depth, drainage and slope, the seasonality of plant uptake, and the days each year when application is not possible because the ground is saturated or frozen? What area is actually available, and how much storage is required?

5 · Drinking-water engineering

Where does potable water for 1,200 dwellings come from, what does abstracting it do to the same catchment that receives the wastewater, and what protects existing drinking-water supplies — including private bores — from the discharge?

6 · Traffic engineering

What is peak-hour generation, not the daily total, and how does the Ridgeburn access intersection perform at peak? What is the assumed directional split across SH6, Gibbston Valley Road and the Crown Range Road approach, what safety effect follows at each affected intersection, and what works are required to carry it?

7 · Transport economics

What do the required roading and intersection works cost, who pays for them and when, and what is the economic cost of the delay imposed on everyone already using those corridors?

8 · Dark-sky and light-pollution assessment

What is the measured night-sky brightness baseline at and around the site, and what is the predicted cumulative change once reflected light, interior light through glazing, resident-installed lighting and vehicle headlights are included alongside the compliant fittings?

9 · Landscape architecture

What is the magnitude of landform, visual and rural-character effect from representative viewpoints, including moving viewpoints on the surrounding roads — and what is the cumulative effect with other consented and proposed development in the same basin?

10 · Tourism economics

What is the economic value of the landscape and night-sky qualities this proposal would alter, and how does it compare with the economic benefit claimed for the development itself?

11 · Planning

How does the proposal sit against the district plan and the applicable national direction, what effects are more than minor, and what could lawfully be imposed as a condition as opposed to merely promised in an application?

12 · Infrastructure finance and governance

Who owns, funds, operates and is liable for the water, wastewater and roading infrastructure this development requires — on day one, in thirty years, and if the developing entity ceases to exist? What happens to the community if an asset fails after the developer has gone?

13 · Legal and resource-management analysis

What does the fast-track pathway permit and preclude, what standing does the public have at each step, what does a referral decision decide and what does it leave open, and what are the routes of challenge and their deadlines?

The six standards every commissioned report must meet

These apply to any report we pay for and publish. A report that does not meet all six does not appear on this site, however helpful its conclusion might be to us.

1. Named author. The report carries the name and qualifications of the person who wrote it. No anonymous expert opinion is published here, ever — an unnamed expert is indistinguishable from an invented one.
2. Stated instruction. The question we asked is published verbatim alongside the answer, so a reader can see whether the question was loaded.
3. Disclosed method. What was measured or modelled, where, when, with what and to what standard — in enough detail that another specialist could repeat it.
4. Declared assumptions. Every input the conclusion depends on, and its source. Any assumption that cannot be sourced is labelled as a gap rather than quietly chosen.
5. Declared interests. Who paid, any prior engagement with any party to this application, and anything else a reasonable reader would want to weigh.
6. Right of reply. Ridgeburn Limited, the Council and any person or body whose work is criticised may respond in full, and the response is published unedited. How to respond.

Two further commitments follow from those six. We publish the report in full rather than an extract of it, because a summary is where inconvenient findings go to be lost. And we publish it whether or not it helps our case — if an independently instructed expert concludes that an effect we have raised is not significant, that conclusion goes up here with the same prominence as one that supports us.

Why nothing here is answered yet

Expert evidence is the single most expensive thing a community campaign has to buy, and it is also the only thing that changes the outcome of a process like this one. A well-argued objection without technical evidence behind it is an opinion. The same objection with a named hydrogeologist’s report attached is a problem the applicant has to answer.

The funding target for this work is $500,000, and it is structured as a ladder so that every tranche buys something specific and nothing is spent on a report that cannot be completed:

• $50,000 — preliminary expert reviews: enough specialist time to identify which of the thirteen questions above are the decisive ones.
• $100,000 — wastewater and hydrogeology, the two disciplines the whole disposal case turns on.
• $150,000 — independent traffic modelling, including peak-hour intersection performance.
• $200,000 — environmental and dark-sky assessment, including a measured night-sky baseline.
• $300,000 — comprehensive expert evidence across the remaining disciplines.
• $400,000 — legal and planning response.
• $500,000 — a fully funded challenge, with every discipline covered and every report published.

Support the Investigation sets out what each tranche buys, where the money goes, and the accountability commitments attached to it. The current position of the fund — [Awaiting client evidence]

If you are one of these specialists

We are interested in hearing from practitioners in any of the thirteen fields above, and particularly from anyone who can tell us that a question on this page is badly framed. A specification written by non-specialists is exactly the kind of document that benefits from expert correction. Contact us through Have Your Say.

To be explicit about what that is not: an approach to us is not an instruction, and nobody who contacts us will be described on this site as our expert, quoted, or named without a signed instruction and their agreement. Until a report exists, with an author’s name on it, there is nothing here to attribute.

Evidence statement

Classification: Expert Evidence (specification only — no expert instructed)

Status: This page is a specification, not expert evidence. No expert has been instructed, no expert is named, and no opinion is attributed to anyone. The thirteen disciplines are the fields we assess this application as requiring.

Author: Ridgeburn Press · Evidence Desk

Last reviewed: 16 September 2026

Sources

1. Application material — the figures each discipline is asked to test, applicant — [Source to be added]
2. Instructions to independently instructed experts — none issued; nothing to cite.

Assumptions

• That the thirteen disciplines listed are those this application requires. This is our assessment and is open to correction by practitioners in those fields.
• That the funding ladder above reflects the cost of commissioning that work. Detailed quotations have not been obtained — [Awaiting client evidence]

What is not established

• Any answer to any of the thirteen questions above.
• That any expert has been engaged, briefed or retained by Ridgeburn Press.
• That the applicant’s own technical reports do not answer these questions — we have not seen them. Where they exist, they are cited as Applicant Evidence — [Source to be added]

Right of response

Ridgeburn Limited, Queenstown Lakes District Council and any person named here may respond in full. How to respond.