| Well number | K36/1074 | File number | CO6C/32025 |
|---|---|---|---|
| Last known owner | CANTERBURY REGIONAL COUNCIL | Well status | Active (exist, present) |
| Street/road | Highbank Cairnbrae Road | NZTM grid reference | BX21:97762-68460 |
| Locality | Ashburton | NZTM X and Y | 1497762 - 5168460 |
| Location description | Location accuracy | 2 - 15m | |
| CWMS zone | Ashburton | Use | Groundwater Quality, Water Level Observation |
| Groundwater allocation zone | Chertsey | Water level monitoring | -- |
| Depth | 126.70m | Water level count | 147 |
| Diameter | 200mm | Initial water level | |
| Measuring point description | TOC | Highest water level | 88.66m below MP |
| Measuring point elevation | 284.33m above MSL (Lyttelton 1937) | Lowest water level | 125.99m below MP |
| Elevation accuracy | < 0.5 m | First reading | 30 Aug 2011 |
| Ground level | 0.84m below MP | Last reading | 10 Mar 2026 |
| Strata layers | 7 | Calc min 80% | 122.73m below MP (Estimated) |
| Aquifer name | Aquifer tests | 0 | |
| Aquifer type | Yield drawdown tests | 0 | |
| Drill date | 30 Jun 2011 | Max tested yield | |
| Driller | McMillan Drilling Ltd | Drawdown at max tested yield | |
| Drilling method | Rotary/Percussion | Specific capacity | |
| Casing material | PVC | Last updated | 29 Oct 2024 |
| Pump type | None Installed | Last field check | 10 Mar 2026 |
| Water use data | No |
Screens
| Screen no. | Screen type | Top (m) | Bottom (m) | Slot size (mm) | Slot length (mm) | Diameter (mm) | Leader length (mm) |
|---|---|---|---|---|---|---|---|
| 1 | Stainless steel | 124.705 | 125.705 | 2.5 | 80 |
No step tests for this well
Comments
| Comment date | Comment |
|---|---|
| 05 Jan 2011 | within road reserve areas only |
| 03 Nov 2011 | Gridref changed from: K36:0757-2989 to K36:07740-30074 and set to an accuracy of QAR 2 Driller confirms |
| 16 Feb 2012 | Pumped for 5 hours using Bennett pump - low flow. Water appearance was clear. Will pump agin in winter when GWL a litle higher to clear clay from screen. |
| 27 Jul 2021 | Purposely installed monitoring bore, designed to be screened at the water table. |
| 10 Jan 2023 | Reference Level updated using LiDAR imagery in Dec 2022. The existing RL was 287. and the QAR RL was 4. The method of calculating the original RL was: Interpolated DTM. If GL from MP is updated in future please assess if RL also needs to be updated. |
| 10 May 2023 | Dec 2022 Reference Level update using LiDAR was in NZVD 2016, rather than Lyttelton 1937. Rectified in May 2023 by using the previously determined LiDAR elevation value and LINZ conversion tool to calculate Lyttelton 1937 elevation and update Reference Level field. Reference Level updated from 283.975m to 284.331m. |