# Cass Bay vs Diamond Harbour, the record side by side

| | [Cass Bay](https://www.chch.live/cass-bay) | [Diamond Harbour](https://www.chch.live/diamond-harbour) |
|---|---|---|
| Population | — | 1,610 (2023) |
| 2023 Census (SA1 join) | **3,117 (indicative)** | 1,536 (indicative) |
| Census households | **1,353** | 693 |
| Under 15 (Census) | 15% | — |
| 65+ (Census) | 17% | — |
| Area | 2.7 km² | **3.02 km²** |
| People per km² | — | 533 |
| Reports filed | 540 | **1,756** |
| Rank on the roll | 86th of 108 | **67th of 108** |
| Reports per km² | 200 | **581** |
| First report on record | 2015 | 2015 |
| Busiest day | 2022-01-16 (8 reports) | **2022-12-04 (10 reports)** |
| Crashes on record | 16 (0 fatal · 2 serious) | **27 (0 fatal · 8 serious)** |
| Epicentres inside the outline | **11 (biggest M4.2)** | 1 (biggest M3.4) |
| Of the outline, red-zoned | — | — |
| The 2011 grade | — | — |
| Flooded on record | — | — |
| The sea’s reach | 1% of the outline | **1% of the outline** |
| Slope-hazard bands | **21% of the outline (+79% broad overlay)** | 0% of the outline (+97% broad overlay) |
| The remembered ground | 17% of the outline (+56% silent-file) | **100% of the outline** |
| The wild ledger | — | — |
| The kept view | **90% of the outline (+60% outstanding), 1 ridgeline** | 23% of the outline (+3% outstanding) |
| The waiting water | — | — |
| The quiet lines | — | — |
| The drawn water | **12 reaches, 10% setback strips** | 38 reaches (Purau Stream, Church Gully Stream), 4% setback strips |
| The allowed shape | 0% under density overlays | 0% under density overlays |
| The rebuild’s receipts | 122 frames filed (2011–2014) | **202 frames filed (2012–2014)** |
| The pedal network | 0.0 km inside the outline | — |
| The remembered names | — | 11 plaques, Diamond Harbour Cemetery, Stoddart Point Reserve |
| The rules on the ground | 8 drawn rules, Rapaki Runanga | **15 drawn rules, Rapaki Runanga** |
| On the hazard register | 1 parcel (none current) | — |
| Made ground on file | 5 parcels (all vouched or natural) | 36 parcels (all vouched or natural) |
| Surveyed rocks | 762 rocks (419 fell, 71 wobble easy) | 123 rocks (24 fell, 16 wobble easy) |
| Cleanups on file | 1 parcel (none verified) | 2 parcels (none verified) |
| The model’s verdict | unlikely (2% of the outline) | — |
| Engineered defences | — | — |
| The canopy | 17 trees (no veterans, 16 remembered felled) | **624 trees (91 veterans, 72 remembered felled)** |
| The plan’s word | Rural Banks Peninsula (52% of the outline, 7% residential) | Residential Banks Peninsula (41% of the outline, 61% residential) |
| The plan’s reservations | — | — |
| The plan’s exceptions | — | — |
| The listed city | — | 1 scheduled item (1 highly significant) |
| The usual complaints | Water Leak (91), Parks (60), Graffiti (38) | Roading/Streets (319), Water Leak (197), Parks (184) |
| Schools | 0 | **1** |
| Parks | 5 | **19** |
| Facilities | 0 | **3** |
| Tracks | 0 | 0 |
| Bus stops | 2 | — |
| Bus routes through | 1 | — |
| Heritage places | 0 | **9** |

Same record, same caveats, the stream counts reports, not virtue.

## Questions, answered briefly

**What is the difference between Cass Bay and Diamond Harbour?**

Cass Bay covers 2.7 km², Diamond Harbour 3.02 km²; the record holds 540 reports for Cass Bay and 1,756 for Diamond Harbour.

**Which has more heritage places, Cass Bay or Diamond Harbour?**

Diamond Harbour, 9 on the heritage register to the other’s 0.

**Where do these numbers come from?**

The same public record for both, council reports, the crash register, the heritage schedule, Stats NZ’s counts. The stream counts reports, not virtue; the caveats are each suburb’s own.

HTML: https://www.chch.live/compare?a=cass-bay&b=diamond-harbour
Data: https://api.chch.live/suburb?slug=cass-bay · https://api.chch.live/suburb?slug=diamond-harbour