Well numberM36/1363 File numberCO6C/02976
Last known ownerChristchurch City Council Well statusActive (exist, present)
Street/road54 COLOMBO ST NZTM grid referenceBX24:70805-76753
LocalityBeckenham NZTM X and Y1570805 - 5176753
Location descriptionLibrary Carpark Location accuracy10 - 50m
CWMS zoneChristchurch - West Melton UseSmall Community Supply,
Groundwater allocation zoneChristchurch West-Melton Water level monitoring--
Depth29.30m Water level count0
Diameter400mm Initial water level0.60m below MP
Measuring point description Highest water level
Measuring point elevation6.47m above MSL (Lyttelton 1937) Lowest water level
Elevation accuracy< 2.5 m First reading
Ground level0.00m above MP Last reading
Strata layers7 Calc min 80%
Aquifer nameRiccarton Gravel Aquifer tests0
Aquifer typeNon-Flowing Artesian Yield drawdown tests1
Drill date25 Sep 1973 Max tested yield159 l/s
DrillerA M Bisley & Co Drawdown at max tested yield4 m
Drilling methodCable Tool Specific capacity40.79 l/s/m
Casing materialSTEEL Last updated29 Jun 2023
Pump typeUnknown Last field check30 Jan 2008
Water use dataNo   

Screens

Screen no. Screen type Top (m) Bottom (m) Slot size (mm) Slot length (mm) Diameter (mm) Leader length (mm)
1 Stainless steel 23.2 29.3

Step tests

Step test date Step Yield Yield GPM DrawDown Step duration
25 Sep 1973 1 159.1 2099.831 3.9 0

Comments

Comment date Comment
NO 25 WELL
FROM OLD CWS DB Wells located at the Columbo St pump station/CCC water services yard. M36/1363 (#4) located behind small pump room on the NW boundary of the yard. Well is covered by a wooden plank lid (several planks are missing & enclosed in a concrete lined pit.
15 Oct 1998 Central pressure zone
10 Jan 2000 FROM OLD CWS DB Surrounding area is the C.C.C water services yard, pump room & control room. Heathcote river borders yard, Cashmere Club is on south boundary & the surrounding land is residential. GRID REF: M36:80796-38425.
04 Feb 2008 Gridref changed from: M36:808-382
20 Jan 2010 Gridref changed from: M36:80841-38423 to M36:80818-38367 from CCC location in aq test M36/4591 report.
04 Feb 2010 Gridref changed from: M36:80818-38367 to M36:80806-38364, update from well photos and Ortho's
14 Apr 2010 Changed well name from MAIN STATION 25 to MAIN PUMPS STN WELL-04
05 May 2010 MfE source code added
10 Jan 2023 Reference Level updated using LiDAR imagery in Dec 2022. The existing RL was 5.7 and the QAR RL was 3. The method of calculating the original RL was: Lidar CCC with QAR 4-5. 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 6.126m to 6.47m.

Bore log