NZ Historic Weather Events Catalogue

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SevereApril 1951 Canterbury Flooding ( 1951-04-16 )

70 years

Flooding was widespread throughout the whole of Canterbury with considerable flooding in the coastal regions causing extensive and serious damage. Roads, railways and telephone connections were affected.

Canterbury

Multi HazardMulti Hazard at Canterbury
Duration:   4  days - From the 16th to the 19th of April.
Comments:

Affected LifelineTelephone and telegraph lines throughout Canterbury were affected by rain and wind and there was widespread damage done to telephone connections. Three channels to the West Coast were lost.

Heavy RainHeavy Rain
Comments:

CommentThere was heavy rainfall in Canterbury on the 16th and extremely heavy rain fell in the back country of South Canterbury.

Physical CharacteristicThe western foothills received 250 mm (25.0 cm) of rain in three days.

Physical Characteristic50-100 mm (5.0-10.0 cm) of rain fell over the plains and along the coast in three days.

ImpactHeavy rainfall caused extremely high flows in rivers and creeks with many overflowing their stopbanks.

FloodingFlooding
Comments:

DamageFlooding was widespread throughout the whole of Canterbury with considerable flooding in the coastal regions causing extensive and serious damage.

Damage CostThe damage to roads for all of Canterbury cost £138,710 ($7,734,000 2009 dollars). The damage to county roads and main highways cost $90,200 ($5,029,000 2009 dollars) and $48,510 ($2,705,000 2009 dollars) respectively.

Affected LifelineSlips and washouts blocked major railway lines. Several slips on the line between Craigieburn and Avoca and another at Jacksons on the West Coast side of the Alps At Sheffield, Darfield and Springfield there are slips and water over the line

Affected LifelineThe Main South Road and Main North Road was blocked by floodwaters. Sections of the main highway between Waipara and Hurunui was badly affected.

Affected LifelineThere was some damage to the railway lines. Most serious damage was to the Midland line. The main line south was blocked at Norwood by floodwaters and 3 ft (0.91 m) of water covered the line at Southbridge. No trains were running between Ashburton and Timaru.

CommentWide areas of North Canterbury were flooded.

ImpactThere was heavy surface flooding at Amberley, Glassnevin and Waipara.

Affected LifelineThere were three major washouts between Hanmer and the engineers camp which was 17 miles over the summit of Lewis Pass on the Canterbury side. No transport was considered possible by either road or rai and there was no link between Canterbury and the West Coast.

ImpactFloods also cut off all means of transport of coal and timber supplies to the east coast.

CommentIt was the worst flood in North and South Canterbury for at least 30 years and in some places up to 50 years.

Affected LifelineApproaches to the highway bridges over the Selwyn, Hinds, Orari and Opihi rivers were covered with swirling water up to 3.5 ft (1.07 m) deep.

Evacuees20 people were rescued by the Army from the district between Pleasant Point and Temuka.

Affected LifelineThe highway from Timaru to Mount Cook was impassable in about five places because of water on the road, wash outs and damaged bridges.

Affected LifelineBridges at Sawdon and McKinnins were washed away and the Allandale and Doyles bridges were washed out at the approaches.

Affected LifelineNearly every road in MacKenzie Country was impassable.

Heavy RainHeavy Rain at Albury
Map Location: -44.231885 170.875643
Comments:

Physical CharacteristicAlbury recorded 3.75 in (9.53 cm) of rain on the 17th.

FloodingFlooding
Comments:

Affected LifelineThe road to Mount Cook was blocked on the Fairlie side of Albury.

FloodingFlooding at Amberley
Map Location: -43.153786 172.731841
Comments:

Affected LifelineThe approaches to the bridge over the North Kowai River at Amberley were washed away and it was closed to traffic.

FloodingFlooding at Arowhenua
Map Location: -44.2674 171.26558
Comments:

Affected LifelineThe Main North Road was impassable at Arowhenua.

Physical CharacteristicWater to a depth of 2.5 ft (0.76 m) was lying on the south side of the Opihi River Bridge at Arowhenua.

Affected LifelineThe road from Arowhenua to Pleasant Point was closed.

EvacueesSeadown and Arowhenua families were evacuated where houses were surrounded by a considerable depth of water. 20 persons were rescued by flat-bottomed boats and a motorboat.

FloodingFlooding at Ashburton
Map Location: -43.902384 171.736416
Comments:

DamageFloods, slips and washouts caused serious damage in the Ashburton district.

ImpactLarge areas of land were inundated.

Affected LifelineThe Main South Road was blocked.

FloodingFlooding at Ashburton River
Map Location: -43.568062 171.483983
Comments:

ImpactFarmlands affected most by the flood were on the south side of the river in the Eiffelton area.

CommentAshburton River was contained mainly within its stopbanks except for an overflow about two miles below Tinwald.

Affected LifelineThe river left its bed in many places along the Ashburton Gorge road above Mount Somers and damaged the approaches to the Stour and Stony creek and Woolshed bridges. The road was impassable at these points.

Physical CharacteristicAshburton River had an estimated discharge of 90,000 cusecs (2549 cumecs).

FloodingFlooding at Ashley River
Map Location: -43.27606 172.67771
Comments:

Physical CharacteristicThe Main North road was blocked at the Ashley Bridge. Water covered both sides of the road to a depth of 3 ft (0.91 m).

Affected LifelineA pier and two iron girders of the railway bridge over the Ashley River were washed away.

ImpactThe Ashley was is in one of its most serious floods in history and caused great concern to residents of Waikuku.

ImpactLogs and large branches were swept under the bridge and the flood waters surged to a height of 8-10 ft (2.4-3.0 m) when striking the main piles of the bridge.

Physical CharacteristicAshley River had a discharge of 100,000 cusecs (2832 cumecs) (which was estimated due to the stopbanks overtopping).

FloodingFlooding at Broomfield
Map Location: -43.11894 172.68401
Comments:

Affected LifelineBerridale Road at Broomfield was closed when the piles supporting the Berridale Bridge collapsed.

FloodingFlooding at Cave
Map Location: -44.31106 170.95874
Comments:

Affected LifelineNo train services were running to Fairlie because of a washout on the line near Cave.

FloodingFlooding at Cheviot
Map Location: -42.815812 173.265245
Comments:

ImpactThe Cheviot area was isolated.

Heavy RainHeavy Rain at Christchurch
Map Location: -43.53112 172.636147
Comments:

Physical CharacteristicChristchurch recorded 1.51 in (3.84 cm) of rain in 24 hours.

Affected LifelineFloodwaters blocked all main roads out of Christchurch except to Akaroa.

ImpactThere was minor surface flooding in Christchurch.

Affected LifelineAll toll circuits north of Christchurch were out of order.

FloodingFlooding at Cricklewood
Map Location: -44.17404 170.84956
Comments:

ImpactThere was flooding at Cricklewood.

FloodingFlooding at Culverden
Map Location: -42.776159 172.855413
Comments:

CommentThere was a heavy flood in the Pahau River near Culverden, and the water lapped the decking of the bridge.

FloodingFlooding at Cust River
Map Location: -43.32142 172.49025
Comments:

CommentCust River was still within its banks but the level was very high.

Heavy RainHeavy Rain at Darfield
Map Location: -43.484623 172.113507
Comments:

Physical CharacteristicDarfield recorded 4.93 in (12.52 cm) of rain from the 16th to the 19th.

FloodingFlooding
Comments:

Affected LifelineAll trains on the White Cliffs branch line from Darfield were cancelled.

Heavy RainHeavy Rain at Erewhon
Map Location: -43.50894 170.85243
Comments:

Physical CharacteristicErewhon recorded 4.11 in (10.44 cm) of rain on the 17th.

FloodingFlooding at Eyre River
Map Location: -43.40959 172.51063
Comments:

CommentThe Eyre had broke its banks in several places and was in high flood.

FloodingFlooding at Fairlie
Map Location: -44.10605 170.814496
Comments:

Affected LifelineThe main streets of Fairlie were flooded.

DamageWater was pouring through some shops damaging quantities of goods.

Affected LifelineThe sewerage system broke down and sewage had to be swept out of shops and cleared from the main street.

CommentThe flood was stated as the "worst seen since 1881".

Affected LifelineDiamond Creek at Goodwins Corner was sweeping down the main Tekapo-Fairlie highway for half a mile. There were big sheets of water covering the road between Fairlie and Burkes Pass.

Affected LifelineThe approach to Woolwash Creek Bridge was washed out and road to Tekapo was closed to traffic.

ImpactResidents of Fairlie were isolated in their homes.

CommentOpihi River at Fairlie broke its banks.

Heavy RainHeavy Rain at Glentui
Map Location: -43.22501 172.28315
Comments:

Physical CharacteristicThere was 9 in (22.86 cm) of rainfall at Glentui on the Loburn-Ashley Gorge highway.

FloodingFlooding
Comments:

Affected LifelineTwo spans of the Glentui Bridge were washed away.

FloodingFlooding at Hanging Rock
Map Location: -44.19579 171.04869
Comments:

Affected LifelineFive spans of the Hanging Rock bridge were washed away.

FloodingFlooding at Hinds River
Map Location: -43.928524 171.529735
Comments:

AreaThe Hinds River burst its banks in many places, flooding 4000 acres (1619 ha) of farmland and isolating homesteads.

ImpactDebris was caught in the piles of bridges. They were endangered due to the pressure of the water.

Heavy RainHeavy Rain at Homebush
Map Location: -43.48092 171.99241
Comments:

Physical CharacteristicHomebush recorded 6.47 in (16.43 cm) of rain from the 16th to the 19th.

FloodingFlooding at Kaiapoi
Map Location: -43.383984 172.645664
Comments:

Affected LifelineA large tract of land about two miles from Kaiapoi on the Ohoka Road was submerged.

ImpactThe main drain into the Cam at Kaiapoi was in full flood and the water barely cleared the under decking of the Skew Bridge.

Stock DamageNo stock losses were reported.

CommentThe Cam was very high.

FloodingFlooding at Kaikoura
Map Location: -42.402255 173.685685
Comments:

Affected LifelineScouring in Luke's Creek, the source of the Kaikoura town water supply, caused service to be cut off.

ImpactThe areas most affected were Kiwi and Bayview streets.

Affected LifelineThe inland road from Kaikoura to Waiau was closed.

CommentThe Kowhai River broke through at the Fernleigh dip on the inland road.

ImpactOn the suburban flats between the township and the seaward Kaikoura range flooding had occurred in the Mount Fyffe and Red Swamp road areas.

FloodingFlooding at Lees Valley
Map Location: -43.14685 172.17342
Comments:

ImpactLees Valley was isolated.

Affected LifelineOne and a half chains (30 m) of the approach to Gillespie's Bridge in the valley were washed away.

FloodingFlooding at Loburn
Map Location: -43.247194 172.52948
Comments:

Physical CharacteristicThe hills around Loburn received more than 2 in (5.08 cm) of rain.

Affected LifelineThe Okuku, Karetu and Station road bridges were all badly damaged and closed to traffic.

Heavy RainHeavy Rain at Lochaber
Map Location: -43.84673 171.06856
Comments:

Physical CharacteristicLochaber recorded 4.34 in (11.02 cm) of rain on the 17th.

FloodingFlooding at Mayfield
Map Location: -43.82128 171.41857
Comments:

CommentWater lapped against the decking of the Mayfield and Maronan bridges.

Affected LifelineOne span of the Mayfield bridge was damaged.

Heavy RainHeavy Rain at Montalto
Map Location: -43.79294 171.33792
Comments:

Physical CharacteristicMontalto recorded 3.80 in (9.65 cm) of rain on the 17th.

Heavy RainHeavy Rain at Mount Nessing
Map Location: -44.26688 170.78358
Comments:

Physical CharacteristicMt Nessing recorded 6.62 in (16.81 cm) of rain on the 17th.

FloodingFlooding at Mount Somers
Map Location: -43.619696 171.375502
Comments:

Affected LifelineOn the Mount Somers branch line piles were washed from a bridge between Cavedish and Mount Somers and the rails over the bridge were twisted.

Heavy RainHeavy Rain at Mount Torlesse
Map Location: -43.25447 171.82249
Comments:

Physical CharacteristicMt Torlesse recorded 11.30 in (28.70 cm) of rain from the 16th to the 19th.

FloodingFlooding at Omihi Stream
Map Location: -43.03669 172.79525
Comments:

ImpactThe highway through Omihi Valley had patches of flooding.

FloodingFlooding at Opihi River
Map Location: -44.262405 171.189002
Comments:

Affected LifelineOpihi River was over both ends of the Allandale Bridge on the Geraldine Road.

ImpactThe Opihi River was well over its banks and up to 4 ft (1.22 m) high around some huts. People were seen on the roof tops.

Physical CharacteristicOpihi River had a discharge of 40,420 cusecs (1145 cumecs) at Hanging Rock.

FloodingFlooding at Orari
Map Location: -44.13804 171.29931
Comments:

Affected LifelineA break in the transmission line occurred in the Orari area where one or more power poles were believed to have been washed away.

FloodingFlooding at Orari River
Map Location: -43.967993 171.21592
Comments:

CommentOrari River was in high flood.

Physical CharacteristicOrari River had a discharge of 29,650 cusecs (840 cumecs) at the Upper Orari Bridge.

FloodingFlooding at Pareora
Map Location: -44.486961 171.215526
Comments:

Affected LifelineAt Amos Bridge in the Pareora Gorge 16 ft (4.88 m) of the approaches were washed away.

Affected LifelineThe highway from Cave to Pareora was closed.

Physical CharacteristicPareora River had an estimated discharge 12,800 cusecs (362 cumecs) with a catchment area of 105 sq miles.

Heavy RainHeavy Rain at Peel Forest
Map Location: -43.91131 171.26236
Comments:

Physical CharacteristicPeel Forest recorded 3.33 in (8.46 cm) of rain on the 17th.

FloodingFlooding at Rakaia River
Map Location: -42.63756 171.39125
Comments:

Affected LifelineSerious damage occurred at the Highbank Power Station. The diversion race was breached resulting in power restrictions.

Heavy RainHeavy Rain at Rangiora
Map Location: -43.309917 172.570905
Comments:

Physical CharacteristicRangiora recorded 82 points (2.89 cm) of rain.

InjuriesOne man was admitted to the Rangiora Hospital suffering from exposure and exhaustation.

FloodingFlooding at Saltwater Creek
Map Location: -43.264896 172.70856
Comments:

CommentThere was considerable flooding of Saltwater Creek.

FloodingFlooding at Selwyn River
Map Location: -43.6641 172.294396
Comments:

CommentThere were extensive overflows from the Selwyn River in many places.

Physical CharacteristicSelwyn River had a discharge of 21,700 cusecs (614 cumecs) which was smaller than the flood of January 1953.

Heavy RainHeavy Rain at Sherwood Downs
Map Location: -43.96066 170.85002
Comments:

Physical CharacteristicSherwood Downs recorded 4.56 in (11.58 cm) of rain on the 17th.

Physical CharacteristicSherwood Downs recorded 3 in (7.62 cm) of rain in 32 hours.

FloodingFlooding at Springburn
Map Location: -43.66344 171.46362
Comments:

Affected LifelineThe approach to the Roxburgh Bridge below Springburn was flooded.

FloodingFlooding at Springfield
Map Location: -43.334894 171.921445
Comments:

Affected LifelineA 80 ft (24.4 m) span of the railway bridge over Kowai River near Springfield was washed out.

FloodingFlooding at Staveley
Map Location: -43.652621 171.445293
Comments:

Affected LifelineFloodwater closed the main highway at Staveley at Bowyers Stream Bridge and between the Alford Forest cutting and Taylors Stream.

FloodingFlooding at Te Moana River
Map Location: -44.07119 171.17791
Comments:

Physical CharacteristicTe Moana River had a discharge 15,230 cusecs (431 cumecs) at Twomeys Bridge.

FloodingFlooding at Te Ngawai
Map Location: -44.21272 170.73019
Comments:

EvacueesIn the Te Ngawai district about 20 families (approximately 80 people) were evacuated.

Affected LifelineTe Ngawai Bridge had a hole in the middle of the decking.

FloodingFlooding at Temuka River
Map Location: -44.22869 171.26576
Comments:

Physical CharacteristicTemuka River had a discharge of 29,250 cusecs (828 cumecs) at Manse Bridge.

FloodingFlooding at The Poplars
Comments:

Affected LifelineThe road at The Populars was badly scoured.

Affected LifelineThe Poplar Road Bridge gave way and was washed out to sea.

FloodingFlooding at Timaru
Map Location: -44.398445 171.2552
Comments:

Affected LifelineThe water supply to the Timaru city reservior was cut. The pipeline from the Cannington Valley was broken.

FloodingFlooding at Waiau
Map Location: -42.6518 173.046278
Comments:

Affected LifelineOn the Waiau branch line there was a washout between Pahau and Culverden and a slip on Weka Pass.

FloodingFlooding at Waikuku Beach
Map Location: -43.28967 172.71645
Comments:

ImpactAshley River and the Taranaki Creek rose and about 150 permanent residents of Waikuku Beach were in danger. Some of the families left the beach.

CommentAshley River breached its banks in three or four places.

Affected LifelineThe flood waters rose so high that all exits from the beach were blocked and the only way out to the main road was by rowing a boat.

ImpactThree houses on the Waikuku side of the road were flooded.

FloodingFlooding at Waimakariri River
Map Location: -43.459744 172.289962
Comments:

Physical CharacteristicThe Waimakariri River was 6 ft (1.83 m) above the normal level.

References

Cowie, C.A.: Attwood, A.K. (1957) Floods in New Zealand 1920-53, The Soil Conservation and Rivers Control Council, Wellington, New Zealand, p.239.
Hydrology Annual No.3 1955, Soil Conservation and River Control Council, Wellington, New Zealand
Major weather events in New Zealand, FLOODS and HIGH RAINFALL to 31st May 2006.
Headline: Floods in North Canterbury
The Press, 18 April 1951.
Headline: Floods in South Canterbury
The Press, 18 April 1951.
Headline: Widespread Flooding in Canterbury
The Press, 19 April 1951.
Headline: Waikuku Beach Isolated
The Press, 20 April 1951.

SevereApril 1951 Canterbury Flooding ( 1951-04-16 )

70 years

Flooding was widespread throughout the whole of Canterbury with considerable flooding in the coastal regions causing extensive and serious damage. Roads, railways and telephone connections were affected.

Canterbury

Multi HazardMulti Hazard at Canterbury
Duration:   4  days - From the 16th to the 19th of April.
Comments:

Affected LifelineTelephone and telegraph lines throughout Canterbury were affected by rain and wind and there was widespread damage done to telephone connections. Three channels to the West Coast were lost.

Heavy RainHeavy Rain
Comments:

CommentThere was heavy rainfall in Canterbury on the 16th and extremely heavy rain fell in the back country of South Canterbury.

Physical CharacteristicThe western foothills received 250 mm (25.0 cm) of rain in three days.

Physical Characteristic50-100 mm (5.0-10.0 cm) of rain fell over the plains and along the coast in three days.

ImpactHeavy rainfall caused extremely high flows in rivers and creeks with many overflowing their stopbanks.

FloodingFlooding
Comments:

DamageFlooding was widespread throughout the whole of Canterbury with considerable flooding in the coastal regions causing extensive and serious damage.

Damage CostThe damage to roads for all of Canterbury cost £138,710 ($7,734,000 2009 dollars). The damage to county roads and main highways cost $90,200 ($5,029,000 2009 dollars) and $48,510 ($2,705,000 2009 dollars) respectively.

Affected LifelineSlips and washouts blocked major railway lines. Several slips on the line between Craigieburn and Avoca and another at Jacksons on the West Coast side of the Alps At Sheffield, Darfield and Springfield there are slips and water over the line

Affected LifelineThe Main South Road and Main North Road was blocked by floodwaters. Sections of the main highway between Waipara and Hurunui was badly affected.

Affected LifelineThere was some damage to the railway lines. Most serious damage was to the Midland line. The main line south was blocked at Norwood by floodwaters and 3 ft (0.91 m) of water covered the line at Southbridge. No trains were running between Ashburton and Timaru.

CommentWide areas of North Canterbury were flooded.

ImpactThere was heavy surface flooding at Amberley, Glassnevin and Waipara.

Affected LifelineThere were three major washouts between Hanmer and the engineers camp which was 17 miles over the summit of Lewis Pass on the Canterbury side. No transport was considered possible by either road or rai and there was no link between Canterbury and the West Coast.

ImpactFloods also cut off all means of transport of coal and timber supplies to the east coast.

CommentIt was the worst flood in North and South Canterbury for at least 30 years and in some places up to 50 years.

Affected LifelineApproaches to the highway bridges over the Selwyn, Hinds, Orari and Opihi rivers were covered with swirling water up to 3.5 ft (1.07 m) deep.

Evacuees20 people were rescued by the Army from the district between Pleasant Point and Temuka.

Affected LifelineThe highway from Timaru to Mount Cook was impassable in about five places because of water on the road, wash outs and damaged bridges.

Affected LifelineBridges at Sawdon and McKinnins were washed away and the Allandale and Doyles bridges were washed out at the approaches.

Affected LifelineNearly every road in MacKenzie Country was impassable.

Heavy RainHeavy Rain at Albury
Map Location: -44.231885 170.875643
Comments:

Physical CharacteristicAlbury recorded 3.75 in (9.53 cm) of rain on the 17th.

FloodingFlooding
Comments:

Affected LifelineThe road to Mount Cook was blocked on the Fairlie side of Albury.

FloodingFlooding at Amberley
Map Location: -43.153786 172.731841
Comments:

Affected LifelineThe approaches to the bridge over the North Kowai River at Amberley were washed away and it was closed to traffic.

FloodingFlooding at Arowhenua
Map Location: -44.2674 171.26558
Comments:

Affected LifelineThe Main North Road was impassable at Arowhenua.

Physical CharacteristicWater to a depth of 2.5 ft (0.76 m) was lying on the south side of the Opihi River Bridge at Arowhenua.

Affected LifelineThe road from Arowhenua to Pleasant Point was closed.

EvacueesSeadown and Arowhenua families were evacuated where houses were surrounded by a considerable depth of water. 20 persons were rescued by flat-bottomed boats and a motorboat.

FloodingFlooding at Ashburton
Map Location: -43.902384 171.736416
Comments:

DamageFloods, slips and washouts caused serious damage in the Ashburton district.

ImpactLarge areas of land were inundated.

Affected LifelineThe Main South Road was blocked.

FloodingFlooding at Ashburton River
Map Location: -43.568062 171.483983
Comments:

ImpactFarmlands affected most by the flood were on the south side of the river in the Eiffelton area.

CommentAshburton River was contained mainly within its stopbanks except for an overflow about two miles below Tinwald.

Affected LifelineThe river left its bed in many places along the Ashburton Gorge road above Mount Somers and damaged the approaches to the Stour and Stony creek and Woolshed bridges. The road was impassable at these points.

Physical CharacteristicAshburton River had an estimated discharge of 90,000 cusecs (2549 cumecs).

FloodingFlooding at Ashley River
Map Location: -43.27606 172.67771
Comments:

Physical CharacteristicThe Main North road was blocked at the Ashley Bridge. Water covered both sides of the road to a depth of 3 ft (0.91 m).

Affected LifelineA pier and two iron girders of the railway bridge over the Ashley River were washed away.

ImpactThe Ashley was is in one of its most serious floods in history and caused great concern to residents of Waikuku.

ImpactLogs and large branches were swept under the bridge and the flood waters surged to a height of 8-10 ft (2.4-3.0 m) when striking the main piles of the bridge.

Physical CharacteristicAshley River had a discharge of 100,000 cusecs (2832 cumecs) (which was estimated due to the stopbanks overtopping).

FloodingFlooding at Broomfield
Map Location: -43.11894 172.68401
Comments:

Affected LifelineBerridale Road at Broomfield was closed when the piles supporting the Berridale Bridge collapsed.

FloodingFlooding at Cave
Map Location: -44.31106 170.95874
Comments:

Affected LifelineNo train services were running to Fairlie because of a washout on the line near Cave.

FloodingFlooding at Cheviot
Map Location: -42.815812 173.265245
Comments:

ImpactThe Cheviot area was isolated.

Heavy RainHeavy Rain at Christchurch
Map Location: -43.53112 172.636147
Comments:

Physical CharacteristicChristchurch recorded 1.51 in (3.84 cm) of rain in 24 hours.

Affected LifelineFloodwaters blocked all main roads out of Christchurch except to Akaroa.

ImpactThere was minor surface flooding in Christchurch.

Affected LifelineAll toll circuits north of Christchurch were out of order.

FloodingFlooding at Cricklewood
Map Location: -44.17404 170.84956
Comments:

ImpactThere was flooding at Cricklewood.

FloodingFlooding at Culverden
Map Location: -42.776159 172.855413
Comments:

CommentThere was a heavy flood in the Pahau River near Culverden, and the water lapped the decking of the bridge.

FloodingFlooding at Cust River
Map Location: -43.32142 172.49025
Comments:

CommentCust River was still within its banks but the level was very high.

Heavy RainHeavy Rain at Darfield
Map Location: -43.484623 172.113507
Comments:

Physical CharacteristicDarfield recorded 4.93 in (12.52 cm) of rain from the 16th to the 19th.

FloodingFlooding
Comments:

Affected LifelineAll trains on the White Cliffs branch line from Darfield were cancelled.

Heavy RainHeavy Rain at Erewhon
Map Location: -43.50894 170.85243
Comments:

Physical CharacteristicErewhon recorded 4.11 in (10.44 cm) of rain on the 17th.

FloodingFlooding at Eyre River
Map Location: -43.40959 172.51063
Comments:

CommentThe Eyre had broke its banks in several places and was in high flood.

FloodingFlooding at Fairlie
Map Location: -44.10605 170.814496
Comments:

Affected LifelineThe main streets of Fairlie were flooded.

DamageWater was pouring through some shops damaging quantities of goods.

Affected LifelineThe sewerage system broke down and sewage had to be swept out of shops and cleared from the main street.

CommentThe flood was stated as the "worst seen since 1881".

Affected LifelineDiamond Creek at Goodwins Corner was sweeping down the main Tekapo-Fairlie highway for half a mile. There were big sheets of water covering the road between Fairlie and Burkes Pass.

Affected LifelineThe approach to Woolwash Creek Bridge was washed out and road to Tekapo was closed to traffic.

ImpactResidents of Fairlie were isolated in their homes.

CommentOpihi River at Fairlie broke its banks.

Heavy RainHeavy Rain at Glentui
Map Location: -43.22501 172.28315
Comments:

Physical CharacteristicThere was 9 in (22.86 cm) of rainfall at Glentui on the Loburn-Ashley Gorge highway.

FloodingFlooding
Comments:

Affected LifelineTwo spans of the Glentui Bridge were washed away.

FloodingFlooding at Hanging Rock
Map Location: -44.19579 171.04869
Comments:

Affected LifelineFive spans of the Hanging Rock bridge were washed away.

FloodingFlooding at Hinds River
Map Location: -43.928524 171.529735
Comments:

AreaThe Hinds River burst its banks in many places, flooding 4000 acres (1619 ha) of farmland and isolating homesteads.

ImpactDebris was caught in the piles of bridges. They were endangered due to the pressure of the water.

Heavy RainHeavy Rain at Homebush
Map Location: -43.48092 171.99241
Comments:

Physical CharacteristicHomebush recorded 6.47 in (16.43 cm) of rain from the 16th to the 19th.

FloodingFlooding at Kaiapoi
Map Location: -43.383984 172.645664
Comments:

Affected LifelineA large tract of land about two miles from Kaiapoi on the Ohoka Road was submerged.

ImpactThe main drain into the Cam at Kaiapoi was in full flood and the water barely cleared the under decking of the Skew Bridge.

Stock DamageNo stock losses were reported.

CommentThe Cam was very high.

FloodingFlooding at Kaikoura
Map Location: -42.402255 173.685685
Comments:

Affected LifelineScouring in Luke's Creek, the source of the Kaikoura town water supply, caused service to be cut off.

ImpactThe areas most affected were Kiwi and Bayview streets.

Affected LifelineThe inland road from Kaikoura to Waiau was closed.

CommentThe Kowhai River broke through at the Fernleigh dip on the inland road.

ImpactOn the suburban flats between the township and the seaward Kaikoura range flooding had occurred in the Mount Fyffe and Red Swamp road areas.

FloodingFlooding at Lees Valley
Map Location: -43.14685 172.17342
Comments:

ImpactLees Valley was isolated.

Affected LifelineOne and a half chains (30 m) of the approach to Gillespie's Bridge in the valley were washed away.

FloodingFlooding at Loburn
Map Location: -43.247194 172.52948
Comments:

Physical CharacteristicThe hills around Loburn received more than 2 in (5.08 cm) of rain.

Affected LifelineThe Okuku, Karetu and Station road bridges were all badly damaged and closed to traffic.

Heavy RainHeavy Rain at Lochaber
Map Location: -43.84673 171.06856
Comments:

Physical CharacteristicLochaber recorded 4.34 in (11.02 cm) of rain on the 17th.

FloodingFlooding at Mayfield
Map Location: -43.82128 171.41857
Comments:

CommentWater lapped against the decking of the Mayfield and Maronan bridges.

Affected LifelineOne span of the Mayfield bridge was damaged.

Heavy RainHeavy Rain at Montalto
Map Location: -43.79294 171.33792
Comments:

Physical CharacteristicMontalto recorded 3.80 in (9.65 cm) of rain on the 17th.

Heavy RainHeavy Rain at Mount Nessing
Map Location: -44.26688 170.78358
Comments:

Physical CharacteristicMt Nessing recorded 6.62 in (16.81 cm) of rain on the 17th.

FloodingFlooding at Mount Somers
Map Location: -43.619696 171.375502
Comments:

Affected LifelineOn the Mount Somers branch line piles were washed from a bridge between Cavedish and Mount Somers and the rails over the bridge were twisted.

Heavy RainHeavy Rain at Mount Torlesse
Map Location: -43.25447 171.82249
Comments:

Physical CharacteristicMt Torlesse recorded 11.30 in (28.70 cm) of rain from the 16th to the 19th.

FloodingFlooding at Omihi Stream
Map Location: -43.03669 172.79525
Comments:

ImpactThe highway through Omihi Valley had patches of flooding.

FloodingFlooding at Opihi River
Map Location: -44.262405 171.189002
Comments:

Affected LifelineOpihi River was over both ends of the Allandale Bridge on the Geraldine Road.

ImpactThe Opihi River was well over its banks and up to 4 ft (1.22 m) high around some huts. People were seen on the roof tops.

Physical CharacteristicOpihi River had a discharge of 40,420 cusecs (1145 cumecs) at Hanging Rock.

FloodingFlooding at Orari
Map Location: -44.13804 171.29931
Comments:

Affected LifelineA break in the transmission line occurred in the Orari area where one or more power poles were believed to have been washed away.

FloodingFlooding at Orari River
Map Location: -43.967993 171.21592
Comments:

CommentOrari River was in high flood.

Physical CharacteristicOrari River had a discharge of 29,650 cusecs (840 cumecs) at the Upper Orari Bridge.

FloodingFlooding at Pareora
Map Location: -44.486961 171.215526
Comments:

Affected LifelineAt Amos Bridge in the Pareora Gorge 16 ft (4.88 m) of the approaches were washed away.

Affected LifelineThe highway from Cave to Pareora was closed.

Physical CharacteristicPareora River had an estimated discharge 12,800 cusecs (362 cumecs) with a catchment area of 105 sq miles.

Heavy RainHeavy Rain at Peel Forest
Map Location: -43.91131 171.26236
Comments:

Physical CharacteristicPeel Forest recorded 3.33 in (8.46 cm) of rain on the 17th.

FloodingFlooding at Rakaia River
Map Location: -42.63756 171.39125
Comments:

Affected LifelineSerious damage occurred at the Highbank Power Station. The diversion race was breached resulting in power restrictions.

Heavy RainHeavy Rain at Rangiora
Map Location: -43.309917 172.570905
Comments:

Physical CharacteristicRangiora recorded 82 points (2.89 cm) of rain.

InjuriesOne man was admitted to the Rangiora Hospital suffering from exposure and exhaustation.

FloodingFlooding at Saltwater Creek
Map Location: -43.264896 172.70856
Comments:

CommentThere was considerable flooding of Saltwater Creek.

FloodingFlooding at Selwyn River
Map Location: -43.6641 172.294396
Comments:

CommentThere were extensive overflows from the Selwyn River in many places.

Physical CharacteristicSelwyn River had a discharge of 21,700 cusecs (614 cumecs) which was smaller than the flood of January 1953.

Heavy RainHeavy Rain at Sherwood Downs
Map Location: -43.96066 170.85002
Comments:

Physical CharacteristicSherwood Downs recorded 4.56 in (11.58 cm) of rain on the 17th.

Physical CharacteristicSherwood Downs recorded 3 in (7.62 cm) of rain in 32 hours.

FloodingFlooding at Springburn
Map Location: -43.66344 171.46362
Comments:

Affected LifelineThe approach to the Roxburgh Bridge below Springburn was flooded.

FloodingFlooding at Springfield
Map Location: -43.334894 171.921445
Comments:

Affected LifelineA 80 ft (24.4 m) span of the railway bridge over Kowai River near Springfield was washed out.

FloodingFlooding at Staveley
Map Location: -43.652621 171.445293
Comments:

Affected LifelineFloodwater closed the main highway at Staveley at Bowyers Stream Bridge and between the Alford Forest cutting and Taylors Stream.

FloodingFlooding at Te Moana River
Map Location: -44.07119 171.17791
Comments:

Physical CharacteristicTe Moana River had a discharge 15,230 cusecs (431 cumecs) at Twomeys Bridge.

FloodingFlooding at Te Ngawai
Map Location: -44.21272 170.73019
Comments:

EvacueesIn the Te Ngawai district about 20 families (approximately 80 people) were evacuated.

Affected LifelineTe Ngawai Bridge had a hole in the middle of the decking.

FloodingFlooding at Temuka River
Map Location: -44.22869 171.26576
Comments:

Physical CharacteristicTemuka River had a discharge of 29,250 cusecs (828 cumecs) at Manse Bridge.

FloodingFlooding at The Poplars
Comments:

Affected LifelineThe road at The Populars was badly scoured.

Affected LifelineThe Poplar Road Bridge gave way and was washed out to sea.

FloodingFlooding at Timaru
Map Location: -44.398445 171.2552
Comments:

Affected LifelineThe water supply to the Timaru city reservior was cut. The pipeline from the Cannington Valley was broken.

FloodingFlooding at Waiau
Map Location: -42.6518 173.046278
Comments:

Affected LifelineOn the Waiau branch line there was a washout between Pahau and Culverden and a slip on Weka Pass.

FloodingFlooding at Waikuku Beach
Map Location: -43.28967 172.71645
Comments:

ImpactAshley River and the Taranaki Creek rose and about 150 permanent residents of Waikuku Beach were in danger. Some of the families left the beach.

CommentAshley River breached its banks in three or four places.

Affected LifelineThe flood waters rose so high that all exits from the beach were blocked and the only way out to the main road was by rowing a boat.

ImpactThree houses on the Waikuku side of the road were flooded.

FloodingFlooding at Waimakariri River
Map Location: -43.459744 172.289962
Comments:

Physical CharacteristicThe Waimakariri River was 6 ft (1.83 m) above the normal level.

References

Cowie, C.A.: Attwood, A.K. (1957) Floods in New Zealand 1920-53, The Soil Conservation and Rivers Control Council, Wellington, New Zealand, p.239.
Hydrology Annual No.3 1955, Soil Conservation and River Control Council, Wellington, New Zealand
Major weather events in New Zealand, FLOODS and HIGH RAINFALL to 31st May 2006.
Headline: Floods in North Canterbury
The Press, 18 April 1951.
Headline: Floods in South Canterbury
The Press, 18 April 1951.
Headline: Widespread Flooding in Canterbury
The Press, 19 April 1951.
Headline: Waikuku Beach Isolated
The Press, 20 April 1951.