| Well number | M36/4494 | File number | CO6C/03634 |
|---|---|---|---|
| Last known owner | Mr D P & Mrs S M Threadwell | Well status | Active (exist, present) |
| Street/road | ELLESMERE JUNCTION RD | NZTM grid reference | BX23:47768-68361 |
| Locality | Ellesmere | NZTM X and Y | 1547768 - 5168361 |
| Location description | Location accuracy | 50 - 300m | |
| CWMS zone | Selwyn - Waihora | Use | Irrigation, Domestic Supply |
| Groundwater allocation zone | Selwyn-Waimakariri | Water level monitoring | -- |
| Depth | 30.00m | Water level count | 0 |
| Diameter | 150mm | Initial water level | 5.00m below MP |
| Measuring point description | Highest water level | ||
| Measuring point elevation | 41.82m above MSL (Lyttelton 1937) | Lowest water level | |
| Elevation accuracy | < 2.5 m | First reading | |
| Ground level | 0.00m above MP | Last reading | |
| Strata layers | 8 | Calc min 80% | 8.09m below MP (Estimated) |
| Aquifer name | Linwood Gravel | Aquifer tests | 0 |
| Aquifer type | Unknown | Yield drawdown tests | 1 |
| Drill date | 18 Dec 1992 | Max tested yield | 14 l/s |
| Driller | McMillan Drilling Ltd | Drawdown at max tested yield | 11 m |
| Drilling method | Rotary/Percussion | Specific capacity | 1.26 l/s/m |
| Casing material | Last updated | 29 Jun 2023 | |
| Pump type | Unknown | Last field check | |
| 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 | 28 | 30 |
Step tests
| Step test date | Step | Yield | Yield GPM | DrawDown | Step duration |
|---|---|---|---|---|---|
| 18 Dec 1992 | 1 | 13.64 | 180.023224 | 10.8 | 3 |
Comments
| Comment date | Comment |
|---|---|
| 17 Jan 2001 | Corrected grid ref and added uses |
| 21 Jul 2011 | Previous owner MARSHALL DD & KM |
| 10 Jan 2023 | Reference Level updated using LiDAR imagery in Dec 2022. The existing RL was 39.24 and the QAR RL was 3. The method of calculating the original RL was: Interpolated DTM <2.5 m. 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 41.509m to 41.823m. |