| Well number | K38/2312 | File number | CO6C/07842 |
|---|---|---|---|
| Last known owner | Holland Farming Limited | Well status | Active (exist, present) |
| Street/road | CROWS ROAD | NZTM grid reference | BZ20:84654-11855 |
| Locality | Ashburton | NZTM X and Y | 1484654 - 5111855 |
| Location description | Location accuracy | 2 - 15m | |
| CWMS zone | Ashburton | Use | Irrigation, |
| Groundwater allocation zone | Mayfield-Hinds | Water level monitoring | -- |
| Depth | 71.02m | Water level count | 0 |
| Diameter | 300mm | Initial water level | 2.40m below MP |
| Measuring point description | ToC | Highest water level | |
| Measuring point elevation | 20.69m above MSL (Lyttelton 1937) | Lowest water level | |
| Elevation accuracy | < 0.5 m | First reading | |
| Ground level | 0.30m below MP | Last reading | |
| Strata layers | 16 | Calc min 80% | 3.42m below MP (Estimated) |
| Aquifer name | Aquifer tests | 0 | |
| Aquifer type | Yield drawdown tests | 6 | |
| Drill date | 03 May 2011 | Max tested yield | 30 l/s |
| Driller | McMillan Drilling Ltd | Drawdown at max tested yield | 23 m |
| Drilling method | Rotary/Percussion | Specific capacity | 1.91 l/s/m |
| Casing material | STEEL | Last updated | 29 Jun 2023 |
| Pump type | Last field check | ||
| Water use data | Yes |
Screens
| Screen no. | Screen type | Top (m) | Bottom (m) | Slot size (mm) | Slot length (mm) | Diameter (mm) | Leader length (mm) |
|---|---|---|---|---|---|---|---|
| 1 | Stainless steel | 67 | 70 | 1 | 250 | 4980 |
Step tests
| Step test date | Step | Yield | Yield GPM | DrawDown | Step duration |
|---|---|---|---|---|---|
| 03 May 2011 | 1 | 11.5 | 151.779114 | 6.01 | 0 |
| 03 May 2011 | 2 | 15.2 | 200.6124 | 9.33 | 0 |
| 03 May 2011 | 3 | 19.1 | 252.085312 | 11.61 | 0 |
| 03 May 2011 | 4 | 24 | 316.7564 | 14.8 | 0 |
| 03 May 2011 | 5 | 27.1 | 357.670776 | 17.28 | 0 |
| 03 May 2011 | 6 | 30.4 | 401.2248 | 22.8 | 0 |
Comments
| Comment date | Comment |
|---|---|
| 03 Apr 2009 | changed from K38:9448-7362, change in location proposed under water permit. |
| 13 Jul 2011 | Gridref changed from: K38:94612-73465 to K38:94618-73460 and set to an accuracy of QAR 2 Driller confirms |
| 10 Jan 2023 | Reference Level updated using LiDAR imagery in Dec 2022. The existing RL was 23.16 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 20.326m to 20.693m. |