NZ Historic Weather Events Catalogue

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ModerateMay 1957 South Island Flooding ( 1957-05-18 )

30 years

Heavy rain caused flooding in Canterbury, Otago and Southland

Canterbury

Heavy RainHeavy Rain at Canterbury
Comments:

CauseComplex depression was centred east of Cook Strait in mid May and moved southwards to give rise to severe floods in many South Island eastern rivers and brought heavy rain over North Canterbury districts on the 19th and 20th

FloodingFlooding
Comments:

Physical CharacteristicHinds River at Black Bridge recorded a discharge of 4630 cusecs (131 cumecs), with a catchment area of 110 sq miles (285km^2)

Physical CharacteristicOrari River at the State Highway Bridge recorded a discharge 20600 cusecs (583 cumecs), with a catchment area of 233 sq miles (603km^2)

Physical CharacteristicWaihi River at the Geraldine recorded a discharge 6400 cusecs (181 cumecs), with a catchment area of 38 sq miles (98km^2)

Physical CharacteristicPapaka Stream at the Rolling Ridges Road recorded a discharge of 1063 cusecs (30 cumecs), with a catchment area of 14 sq miles (36km^2)

Physical CharacteristicPareora River at the Gorge recorded a discharge of 7370 cusecs (209 cumecs), with a catchment area of 125 sq miles (324km^2)

Physical CharacteristicPareora River South at Craigmore Bridge recorded a discharge of 2940 cusecs (83 cumecs), with a catchment area of 42 sq miles (109km^2)

Physical CharacteristicMakikihi River at State Highway Bridge recorded a discharge of 2611 cusecs (74 cumecs), with a catchment area of 40 sq miles (104km^2)

Physical CharacteristicWaimate Creek at Cableway recorded a discharge of 1982 cusecs (56 cumecs), with a catchment area of 23 sq miles (60km^2)

Affected LifelineRail arteries were severed with all traffic disrupted on the main trunk line and branch lines by flooding and numerous slips

CommentConsiderable areas in Halswell, Tai Tapu, Ahuriri Lagoon, Motukarara and Little River districts were inundated with Otahuna and Kaituna areas being worst affected

DamageRiver works suffered some damaged and were bridges endangered

FloodingFlooding at Banks Peninsula
Map Location: -43.73644 173.024672
Comments:

CommentBanks Peninsula experienced heavy rain and unfavourable discharge conditions were caused by Lake Ellesmere being at a high level

FloodingFlooding at Halswell
Map Location: -43.5831 172.5696
Comments:

CommentExtensive flooding occurred in Halswell and adjacent catchments

Physical CharacteristicHalswell River had a peak discharge of 355 cusecs (10 cumecs) at Hidgins Bridge

Otago

Heavy RainHeavy Rain at Otago
Duration:   4  days - Rain commenced on the 18th and caused heavy flooding which diminished around the 21st
Comments:

CauseA complex depression centred east of Cook Strait deepened during the day and moved southward to bring strong to gale force winds and heavy rain over coastal Otago

FloodingFlooding
Comments:

CommentFlooding occurred in many Otago districts with swollen rivers spilling onto thousands of acres of farmland and runoff was accentuated by snow on the high country

CommentIt was the worst flood in Otago in 30 years with several Central Otago districts isolated by rising floodwaters

Physical CharacteristicLee Stream at the Main Highway Bridge recorded a discharge of 10300 cusecs (292 cumecs) from a catchment area of 71 sq miles (184 km^2)

Physical CharacteristicDeep Stream at the Main Highway Bridge recorded a discharge of 13000 cusecs (368 cumecs) from a catchment area of 91 sq miles (236 km^2)

Physical CharacteristicSutton Stream at the Main Highway Bridge recorded a discharge of 3200 cusecs (91 cumecs) from a catchment area of 57 sq miles (148 km^2)

Physical CharacteristicKye Burn at Kyeburn recorded a discharge of 3500 cusecs (99 cumecs) from a catchment area of 145 sq miles (376 km^2)

Physical CharacteristicLittle Kye Burn above Deep Creek recorded a discharge of 2141 cusecs (61 cumecs) from a catchment area of 16 sq miles (41 km^2)

Physical CharacteristicManuherikia at Ophir recorded a discharge of 14000 cusecs (396 cumecs) from a catchment area of 786 sq miles (2036 km^2)

Affected LifelineRoad arteries were severed with nearly every road in Otago affected by floodwaters

Affected LifelineThe main north road was impassable on the night of the 19th at Bushey and Maheno due to the Kakanui River spilling over its banks

Affected LifelineAt Goodwood and Wairunga flood water caused motorists trouble and at Hampden and Glenavy there was flood water

Physical CharacteristicAt Pigroot sections of the road had water up to 2 ft (61cm) deep and traffic had to turn back

Affected LifelineUpper Shag River bridge was washed away

Affected LifelineThere were no N.A.C. (National Airway Corperation) flights during the 19th

Affected LifelineThe main trunk line was washed out between Milton and Balclutha, at Allanton and at Puketeraki

Affected LifelineCentral Otago line was blocked for days by flooding and a number of slips. One slip at Christmas Creek was 500 yards long

Affected LifelineThe Roxburgh line was blocked at Waitahuna

Physical CharacteristicThe Catlins branchline was under 3.5 ft (1.07m) of water on one section

Affected LifelineOne railcar service and all road service buses from Dunedin to Cromwell were cancelled on the 20th

Affected LifelineAt one point the railway line had been dragged 3 ft 6 in (1.07m) out of place by the current and the ballast was scoured out in parts

DamageRiver and drainage works suffered extensive damage and severe erosion and slumping occurred at a number of places

Property DamageConsiderable damage occurred to public and private property

EvacueesSome areas were practically isolated and many houses and buildings were evacuated

Physical CharacteristicSouth Islands main trunk railway between Dunedin and Milton was submerged to depths of up to 6 ft (1.8m)

Affected LifelineRail traffic was disrupted for 10 days

Affected LifelineA road section between Lawrence and Roxburgh was still closed on the 27th where a bridge was swept away

Damage CostDamage to river and drainage works was of the order of £14000 ($604,300 2009 dollars)

Damage CostDamage estimated to total over £170,000 ($7,254,000 2009 dollars) for public and private property not including railway department losses. Included in property damage is the loss in revenue because of the break in services as well as the cost of hiring buses

Damage CostDamage estimated to be £100,000 ($4,267,000 2009 dollars) for State Highways and bridges (including replacing two Manuherikia and Shag River bridges and repairing Idaburn Bridge), clearing slips, repairing roads and large amount of general maintenance

Damage CostDamage estimated to be £30,000 ($1,280,000 2009 dollars) for river protection works and reconditioning

Damage CostDamage estimated to be £10,000 ($426,700 2009 dollars) for county road repairs throughout the province excluding Taieri County

Damage CostDamage estimated in Bruce County to be £750 ($32,000 2009 dollars)

Damage CostDamage estimated in Tuapeka County to be £1000 ($42,700 2009 dollars)

Damage CostDamage estimated in Clutha to be £1200 ($51,200 2009 dollars)

Damage CostDamage estimated in Waihemo to be £1200 ($51,200 2009 dollars)

Damage CostDamage estimated in Waitaki to be £1000 ($42,700 2009 dollars)

Damage CostDamage estimated in Vincent to be £500 ($21,300 2009 dollars)

Damage CostDamage estimated to be £10,000 ($426,700 2009 dollars) for private property repairs on Taieri Plain ( the place of greatest private property damage)

Damage CostConservative damage estimate of £20,000 ($853,500 2009 dollars) for crops and farm properties (not including houses) for the whole province

Damage CostEstimated £5,400 ($230,400 2009 dollars) for stock losses in the whole province

Stock DamageApproximately 700 sheep were lost along with a small number of cattle

Damage CostOne car insurance authority estimated £1,500 ($64,000 2009 dollars) for motorcar damage

CommentThere was substantial damage to the railway lines but no reliable estimate of damage costs was made by the Railways Department

CommentOn the 22nd all road and rail services north resumed and the main Central Otago highway through Lawrence was cleared

FloodingFlooding at Dunedin
Map Location: -45.87911 170.502707
Comments:

Affected LifelineDuring the flood road access to Dunedin was cut off to the north and south

Affected LifelineAll train and railcar services through Dunedin were cancelled on the 19th

Damage CostThe damage costs for Dunedin City were only a few pounds which were spent on minor slips and cleaning up of silt

ImpactOver a week after the flood there was still a backlog of goods waiting to be transported and a break in coal supplies from the south caused difficulties for Dunedin industries

FloodingFlooding at Oturehua
Map Location: -45.00708 169.91488
Comments:

Physical CharacteristicThe road between Oturehua and Poolburn had flood waters up to 2 ft 6 in (76cm) deep on the night of the 19th

Affected LifelineA bridge approximately half a mile from Oturehua was closed when its supports were washed away and approaches to another bridge in the area were undermined

Physical CharacteristicThe road between Oturehua and Ranfurly had 4 to 5 in (10 - 13cm) of water across it with some parts badly scoured

Affected LifelineOn the 27th a bridge was still out of use near Oturehua

FloodingFlooding at Waitati
Map Location: -45.744659 170.573352
Comments:

EvacueesA number of houses were evacuated at Waitati

FloodingFlooding at Riverside
Comments:

ImpactRiverside was one of the areas worst hit by flood waters on the 19th and it became a large sized lake within a few hours

Stock DamageAt Riverside approximately 100 sheep drowned when a floodbank burst on the night of the 19th

Stock DamageOne farmer lost 4 dairy cows

FloodingFlooding at East Taieri
Map Location: -45.898751 170.338476
Comments:

CommentEast Taieri was one of the areas worst hit by flood waters on the 19th

Affected LifelineThe narrow district between East Taieri bank and Henley flooded in the afternoon of the 19th including Main South Road and the main railway line

Physical CharacteristicAccumulated peak flows through and into the East Tairei area were considered to exceed 85000 cusecs (2407 cumecs)

CommentFlood levels in the East Tairei ponding area and the Allanton-Henley floodway were the highest ever recorded

CommentThere was still a lot of water around on the night of the 27th

FloodingFlooding at Taieri Plain
Map Location: -45.88401 170.253762
Comments:

CommentMany older inhabitants of Taieri Plains were predicting the flood to be "the worst ever"

CommentGeneral flooding occurred at Taieri Plain, particularly in lower lying areas. More than 5000 acres of rich farmland on the Tairei Plains were badly flooded with some areas under water for over a month

Crop DamageHeavy losses were sustained particularly in Taieri Plains where many valuable standing crops were ruined. Most serious loss to farmers was pasture, hay stacks and silage pits

CommentAt West Taieri Plain it was believed to be the worst flood crisis in 17 years

Peak River LevelAt Taieri Plains the Taieri River had a peak flood level of 19 ft 9 in (6.02m) at 5pm on 19th

Stock Damage420 sheep drowned

FloodingFlooding at Outram
Map Location: -45.859829 170.220115
Comments:

Peak River LevelThe Taieri River at Outram had a discharge of 71000 cusecs (2010 cumecs) from a catchment area of 1850 sq miles (4791km^2) (this was the highest recorded peak at that time with the river level 1 ft above 1940 flood level)

Affected LifelineTraffic was blocked at Outram bridge between Allanton, Macraes Flat and Hyde and the approach to the bridge between Hyde and Macraes Flat was washed out

CommentTwo farming families were rescued by a motorboat from a marooned houses near Outram bridge

Crop DamagePrivate potato crops suffered especially in Outram and Riverside but main crops were only lightly flooded

Physical CharacteristicAt Outram the Taieri River dropped to 18 ft 3 in (5.56m) at 2:20am on the 20th

CommentWater was lapping a few inches below window sills of at least one house near the Outram bridge

Heavy RainHeavy Rain at West Taieri
Comments:

Physical CharacteristicWest Taieri recorded 0.68 in (1.73cm) of rain up to 12am on the 18th

Physical CharacteristicWest Taieri recorded 1.48 in (3.76cm) up to 6am on the 19th

Physical CharacteristicWest Taieri recorded 0.74 in (1.88cm) of rain in six hours from 6am to 12pm on the 19th

FloodingFlooding at Otokia
Map Location: -45.949801 170.189367
Comments:

Physical CharacteristicAt Otokia the Taieri River was approximately 4 in (10cm) from the top of the bank

Affected LifelineMain South Road and the railway line was still impassable at Otokia on the 22nd

FloodingFlooding at Allanton
Map Location: -45.918208 170.25344
Comments:

Comment60 volunteers sandbagged approximately 10 chains (200m) of riverbank near Allanton

Stock DamageOne Allanton farmer lost nearly 200 stud ewes and lambs which were swept away and drowned

FloodingFlooding at Woodside
Map Location: -45.85912 170.17628
Comments:

CommentThe Contour Channel had two minor breaches near Woodside

ImpactA sizeable area was flooded between the breached Contour Channel and Lee Creek forming a broad lake of muddy water which covered fence posts

FloodingFlooding at Mosgiel
Map Location: -45.882205 170.333108
Comments:

CommentSilver Stream overflowed its banks below Mosgiel

FloodingFlooding at Maniototo Plain
Map Location: -45.151841 170.039107
Comments:

Affected LifelineManiototo Plains had considerable surface water in lower lying areas and several roads were covered with inches of water

CommentAll creeks and rivers flowing into the Taieri River were swollen with most running high

FloodingFlooding at Pigroot
Map Location: -45.20809 170.43034
Comments:

Affected LifelineAccess to Pigroot was blocked at Kyeburn and the Kyeburn to Danseys Pass road was blocked

FloodingFlooding at Patearoa
Map Location: -45.27289 170.054672
Comments:

Affected LifelineThe roads from Patearoa to Ranfurly and from Patearoa to Waipiata had water in places

Affected LifelineThe road from Paerau to Patearoa was blocked on the 19th

Physical CharacteristicThe Taieri River was rising at rate of 1 in (2.54cm) an hour on the night of the 19th

Physical CharacteristicThe Taieri River was about 2 miles (3.22km) wide at several points

FloodingFlooding at Taieri River
Comments:

CommentTaieri River and its tributaries were still swollen with melting snow from mountains on the 21st

FloodingFlooding at Middlemarch
Map Location: -45.508281 170.125395
Comments:

Affected LifelineThe road between Middlemarch and Macraes Flat was impassable

FloodingFlooding at Strath Taieri Plain
Map Location: -45.488248 170.11614
Comments:

Physical CharacteristicAll land adjoining Taieri River flooded in Strath-Taieri basin and many tributary creeks in the district were overflowing

Stock DamageHundreds of sheep and lambs were lost and several farmers had stock marooned on islands within the flood waters

Stock DamageOne farmer lost 108 lambs

Property DamageHundreds of feet of fencing was destroyed

Property DamageStrath Tairei was badly affected with inundation with the biggest losses from fencing but stock losses were light

Stock Damage160 sheep drowned

FloodingFlooding at Catlins
Map Location: -46.489995 169.721959
Comments:

CommentFlooding occurred at Huipapa, Tawanui and Kahuika and the Catlins River was in flood

Affected LifelineA small bridge over a tributary swept away

LandslideLandslide at Otago Harbour
Map Location: -45.84009 170.59708
Comments:

Affected LifelineElectricity cut twice to towns from Ravensbourne to Sawyers Bay

ImpactThe bank at Black Jack's Point on the road from Dunedin to Port Chalmers gave way on the morning of the 19th. Huge boulders and earth crashed onto road bringing down wiring and leaving power poles leaning. Barely after the wiring from the first slip had been fixed, a second slip brought wiring down again

FloodingFlooding at Milton
Map Location: -46.123263 169.966084
Comments:

CommentIt was the heaviest flooding in Milton for several years

CommentTokomairiro River overflowed in several places

Physical CharacteristicWithin the Clarksville district there was a two mile (3.22km) ribbon of water which was 2 ft (61cm) deep in places

Affected LifelineThe Moneymore area and all the land east of the main south highway were under water

Physical CharacteristicThe road between Milton and Central Otago had 2 ft 6 in (76.2cm) water covering the road, the approach to the new Glenore bridge was washed out and power poles were washed out

Physical CharacteristicWater in the streets was up to 18 in (45.7cm) deep

Stock DamageNo stock losses reported

ImpactIsolated settlers were able to get out at 12pm on 21st when the water receded

FloodingFlooding at Toko Mouth
Map Location: -46.22126 170.04232
Comments:

ImpactToko Mouth was isolated by a sea of water

FloodingFlooding at Lovells Flat
Map Location: -46.174409 169.837707
Comments:

ImpactLovell's Flat was cut off on the night of the 19th

FloodingFlooding at Lawrence
Map Location: -45.914289 169.691279
Comments:

CommentFire bell warned people early on 19th morning of the flood

Affected LifelineWetherston Creek was in high flood, it breached its banks and it poured through the railway embankment into a sludge channel causing approximately 3 chains (60m) of railway line to be left hanging in midair

CommentWetherston Creek silted up its channels at Wetherstone and flowed down the County Road.

Physical CharacteristicWetherston Creek was falling by 5pm of the 19th

Physical CharacteristicLawrence recorded 4.85 in (12.3cm) of rain over the 18th and 19th

FloodingFlooding at Waitahuna
Map Location: -45.986063 169.747236
Comments:

CommentThe flood in Waitehuna was reported as the worst flood in memory

CommentHeavy rain flooded creeks and the Pomahaka River in the Tapanui and Heriot area

Physical CharacteristicShopping area at Waitehuna was under 2-3 ft (61 - 91cm) of water at the height of the flood

Affected LifelineRoads adjacent to Waitahuna and other smaller tributaries were damaged

Stock DamageOne Glenore farmer lost approximately 500 sheep but otherwise stock losses were light

Heavy RainHeavy Rain at Oamaru
Map Location: -45.087138 170.980874
Comments:

Physical CharacteristicOamaru recorded 2.14 in (5.44cm) of rain overnight of the 18th to the 19th

FloodingFlooding
Comments:

Affected LifelineThe area worst affected was north of Orana Park where the water was over the main northern highway in several places

Physical CharacteristicOamaru Creek was only 2 ft (61 cm) below Severn Street bridge at 12pm on the 19th and was still rising

ImpactLarge drains on either side of Thames highway were unable to cope and properties were flooded

DamageOne petrol station had to write off petrol stocks because water filtered into the tanks

Affected LifelineWaiareka Creek Bridge was damaged south of Oamaru and Upper Kauru Bridge was also damaged

Affected LifelineThe main highway north of Hampden was under 1 ft (30.5cm) of water, the Kakanui-Waianakarua highway was blocked by a slip, Maheno-Kakanui Road had water over a considerable distance of it

Maritime / CoastalMaritime / Coastal
Comments:

DamageHeavy seas pounded Oamaru breakwater and coastline causing some erosion

FloodingFlooding at Elderslie
Map Location: -45.024652 170.832594
Comments:

Physical CharacteristicNgapara Road at Elderslie was blocked with 2-3 ft (61-91cm) of water

FloodingFlooding at Papakaio
Map Location: -44.98893 170.97533
Comments:

Affected LifelinePukeuri to Kurow road was blocked in several places at Papakaio

FloodingFlooding at Shag River
Comments:

CommentShag River was high on the night of the 19th and was almost up to the 1946 record height at Dunback

FloodingFlooding at Palmerston
Map Location: -45.483857 170.721017
Comments:

Affected LifelineThe Dunback to Palmerston road was impassable late on the night of the 19th

CommentHeavy rain fell on the night of the 18th and on the 19th but there was little local flooding

FloodingFlooding at Shag Point
Map Location: -45.460411 170.814648
Comments:

Affected LifelineAt Shag Point there were slips on railway line and the road

FloodingFlooding at Wairunga
Map Location: -45.5158 170.69738
Comments:

Physical CharacteristicAt Wairunga the road was flooded by 2 ft (61cm) of stormwater

FloodingFlooding at Waronui
Map Location: -46.16934 169.9833
Comments:

ImpactOne man was marooned on horseback overnight by rapid rise of the Tokomairiro River

FloodingFlooding at Balclutha
Map Location: -46.23013 169.733472
Comments:

CommentThe Clutha River was several ft above normal late on the night of the 19th and was still rising. It gave rise to serious flooding in the lower Clutha

Peak River LevelThe Clutha River reached a peak height of 69 ft (21m) at Balclutha at 11pm on 20th

Physical CharacteristicThe Clutha River fell to 66 ft 6 in on 21st night (but was still 6.5 ft (2m) above normal)

Physical CharacteristicDischarge from the Clutha River at Balclutha on the 19th was 73000 cusecs (2010 cumecs) over a catchment area of 7840 sq miles (20,306km^2)

CommentBelow Balclutha the Inchclutha stopbanks overtopped at Dales and the Kaitangata bank blew out

CommentFlooding occurred in the Matau and Otanomomo districts

Damage CostPronounced erosion and slumping occurred especially at the Matau branch of Clutha and Tuapeka River with an estimated cost of repairs of £10,000 ($431,600 2009 dollars)

CommentAt Inchclutha there was mainly surface flooding caused by the high river level backing up drainage outlets and tributary flows

FloodingFlooding at Waitepeka
Map Location: -46.28707 169.67122
Comments:

CommentThe Puerua River overflowed across the flax swamp and invaded the Waitepeka settlement

FloodingFlooding at Kelso
Map Location: -45.905986 169.231867
Comments:

CommentPomahakaka River overflowed into Kelso township and its tributary, the Swiftburn, overflowed into Heriot

FloodingFlooding at Waikoikoi
Map Location: -46.004822 169.154311
Comments:

CommentWaikoikoi Creek overflowed into Waikoikoi settlement

FloodingFlooding at Barnego
Map Location: -46.229256 169.717954
Comments:

CommentBarnego experienced some surface flooding during the 21st

CommentBarnego stopbank was breached and Barnego Flat was inundated

Stock DamageSome stock losses at Barnego but only a fraction of losses that occurred from previous floods

FloodingFlooding at Henley
Map Location: -45.981427 170.16589
Comments:

Evacuees27 refugees were at the White House Hotel (22 adults, 5 children) in cramped upper rooms for over 36 hours with no electricity or phone communication. They had been rescued from nearby houses, farms and stranded vehicles and Red Cross brought emergency supplies to them

Affected LifelineOn the 21st the water still several feet deep along the road and water was still lapping over windowsills of some houses

DamageMany houses were in a sodden and filthy condition

ImpactAt the Henley Hotel 20 people were still isolated on the 22nd

DamageOne house along Taieri River was devastated by flood. It was a complete loss with one wall forced out by water, a watermark on walls 3 ft 7 in from floor, inches of silt in house, household goods strewn across fields and stock scattered, starving or marooned in islands

FloodingFlooding at Maniototo Plain
Map Location: -45.151841 170.039107
Comments:

Affected LifelineManiototo Plain was one of the hardest hit areas. Swollen streams and the Taieri River swept away approaches to bridges and scoured out roads

Damage CostDamage estimated at £10,000 ($431,600 2009 dollars)

Affected LifelineFlooding diminished on the 21st with hardly a bridge or road left untouched

CommentOne of most destructive floods for years

Affected LifelineSeveral small townships were completely isolated at height of flood and Maniototo Plains were cut off from coast until the afternoon of the 21st

Affected LifelineBridges unusable were Sowburn, Styx, Roberts Bridge, two bridges on Kyeburn Diggings Road, Hayes Bridge at Oturehua, Dunstan Bridge and Manuherikia Bridge

DamageUnsealed roads were badly scoured and recently sealed parts were also severely damaged. The repairs were expected to take months with some sections of the road having to be reformed completely and approaches to bridges renewed

FloodingFlooding at Waipiata
Map Location: -45.181718 170.164281
Comments:

DamageThere was severe damage in Waipiata

Peak DischargeThe maximum flood recorded at Waipiata for the Taieri River was a discharge of 278 cumecs over a catchment area of 1865km^2 on the 21st

FloodingFlooding at Kokonga
Map Location: -45.210004 170.246345
Comments:

Peak River LevelIn Kokonga the flooding was still severe on the 21st and the Taieri River reached its highest ever level of 8 ft (2.44m) above normal

Affected LifelineSeveral houses and the railway station was swirling with water

FloodingFlooding at Ranfurly
Map Location: -45.131163 170.112657
Comments:

Affected LifelineThe bent bridge between Ranfurly and Omakau was impassable

Affected LifelineDamage occurred to the Ranfurly water supply system with approximately 300 yards of the main supply pipe swept away. Water was cut off in town on the 20th and they were left with a limited supply

Heavy RainHeavy Rain at Alexandra
Map Location: -45.253862 169.375391
Comments:

ImpactGalloway area was isolated by water from the flooding Manuherikia River on the 20th

Affected LifelineThe bridge linking Galloway and Alexandra was damaged

CommentManuherikia River dropped about 6 ft on the morning of the 21st but a slight rise in river level occurred again in the late afternoon

Heavy RainHeavy Rain at Roxburgh
Map Location: -45.54246 169.300336
Comments:

Physical CharacteristicRoxburgh recorded 2.24 in (5.7cm) at Blackstone Hill from the 18th to the 20th

CommentThe Clutha River at Roxburgh was still running high and dirty on the 21st

Heavy RainHeavy Rain at Queenstown
Map Location: -45.041441 168.645105
Comments:

CommentLake Wakatipu was high on the 21st from melted snow

Heavy RainHeavy Rain at Berwick
Map Location: -45.944896 170.106376
Comments:

CommentConsiderable areas around Berwick were inundated by backed up waters from Lakes Waipori and Waihola

Heavy RainHeavy Rain at Cardrona
Map Location: -44.879797 168.99807
Comments:

Physical CharacteristicCardrona 1.01 in (2.57cm) from the 18th to the 20th

Heavy RainHeavy Rain at Tapanui
Map Location: -45.945409 169.268023
Comments:

Physical CharacteristicTapanui 4.71 in (11.96cm) from the 18th to the 20th

References

Hydrology Annual, No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand.
Hydrology Annual, No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand.
O:\RSKD102\RawData\Archives\Documentation\1957-05-18th-21st South Island FloodingTable
Major weather events in New Zealand, FLOODS and HIGH RAINFALL, to 31st May 2006.
Headline: Deluge At Oamaru Floods Properties.
Otago Daily Times, 20 May 1957.
Headline: Farmer Sits Fast On Horse.
Otago Daily Times, 20 May 1957.
Headline: Flooding In Province: Desperate Battle Against Taieri.
Otago Daily Times, 20 May 1957.
Headline: Heavy Flooding Around Milton.
Otago Daily Times, 20 May 1957.
Headline: Lawrence.
Otago Daily Times, 20 May 1957.
Headline: Many Districts Isolated By Rising Floodwaters.
Otago Daily Times, 20 May 1957.
Headline: Rescued
Otago Daily Times, 20 May 1957.
Headline: Shag River.
Otago Daily Times, 20 May 1957.
Headline: Train Services.
Otago Daily Times, 20 May 1957.
Headline: Volunteers Stave Off Immediate Threat.
Otago Daily Times, 20 May 1957.
Headline: Wires Down.
Otago Daily Times, 20 May 1957.
Headline: Crop Losses.
Otago Daily Times, 22 May 1957.
Headline: Floods Recede: Taieri And Clutha Falling Steadily.
Otago Daily Times, 22 May 1957.
Headline: Red Cross Brings Aid To Flood Refugees.
Otago Daily Times, 22 May 1957.
Headline: Taieri Crisis Eases With Receding Flood.
Otago Daily Times, 22 May 1957.
Headline: Two Hundred Stud Sheep Drowned.
Otago Daily Times, 22 May 1957.
Headline: Widespread Damage Caused By Flooding In Maniototo.
Otago Daily Times, 22 May 1957.
Headline: Family Escapes Narrowly As Flood Ruins House.
Otago Daily Times, 24 May 1957.
Headline: Flood Cost Otago Over £170,000.
Otago Daily Times, 28 May 1957.
Headline: South Line May Open Tomorrow.
Otago Daily Times, 28 May 1957.
Headline: Worst Break.
Otago Daily Times, 28 May 1957.
Owen, R.E. (1969). Hydrology Annual No.16, 1968. Soil Conservation and Rivers Control Council. Wellington, NZ: The Ministry of Works.

ModerateMay 1957 South Island Flooding ( 1957-05-18 )

30 years

Heavy rain caused flooding in Canterbury, Otago and Southland

Canterbury

Heavy RainHeavy Rain at Canterbury
Comments:

CauseComplex depression was centred east of Cook Strait in mid May and moved southwards to give rise to severe floods in many South Island eastern rivers and brought heavy rain over North Canterbury districts on the 19th and 20th

FloodingFlooding
Comments:

Physical CharacteristicHinds River at Black Bridge recorded a discharge of 4630 cusecs (131 cumecs), with a catchment area of 110 sq miles (285km^2)

Physical CharacteristicOrari River at the State Highway Bridge recorded a discharge 20600 cusecs (583 cumecs), with a catchment area of 233 sq miles (603km^2)

Physical CharacteristicWaihi River at the Geraldine recorded a discharge 6400 cusecs (181 cumecs), with a catchment area of 38 sq miles (98km^2)

Physical CharacteristicPapaka Stream at the Rolling Ridges Road recorded a discharge of 1063 cusecs (30 cumecs), with a catchment area of 14 sq miles (36km^2)

Physical CharacteristicPareora River at the Gorge recorded a discharge of 7370 cusecs (209 cumecs), with a catchment area of 125 sq miles (324km^2)

Physical CharacteristicPareora River South at Craigmore Bridge recorded a discharge of 2940 cusecs (83 cumecs), with a catchment area of 42 sq miles (109km^2)

Physical CharacteristicMakikihi River at State Highway Bridge recorded a discharge of 2611 cusecs (74 cumecs), with a catchment area of 40 sq miles (104km^2)

Physical CharacteristicWaimate Creek at Cableway recorded a discharge of 1982 cusecs (56 cumecs), with a catchment area of 23 sq miles (60km^2)

Affected LifelineRail arteries were severed with all traffic disrupted on the main trunk line and branch lines by flooding and numerous slips

CommentConsiderable areas in Halswell, Tai Tapu, Ahuriri Lagoon, Motukarara and Little River districts were inundated with Otahuna and Kaituna areas being worst affected

DamageRiver works suffered some damaged and were bridges endangered

FloodingFlooding at Banks Peninsula
Map Location: -43.73644 173.024672
Comments:

CommentBanks Peninsula experienced heavy rain and unfavourable discharge conditions were caused by Lake Ellesmere being at a high level

FloodingFlooding at Halswell
Map Location: -43.5831 172.5696
Comments:

CommentExtensive flooding occurred in Halswell and adjacent catchments

Physical CharacteristicHalswell River had a peak discharge of 355 cusecs (10 cumecs) at Hidgins Bridge

Otago

Heavy RainHeavy Rain at Otago
Duration:   4  days - Rain commenced on the 18th and caused heavy flooding which diminished around the 21st
Comments:

CauseA complex depression centred east of Cook Strait deepened during the day and moved southward to bring strong to gale force winds and heavy rain over coastal Otago

FloodingFlooding
Comments:

CommentFlooding occurred in many Otago districts with swollen rivers spilling onto thousands of acres of farmland and runoff was accentuated by snow on the high country

CommentIt was the worst flood in Otago in 30 years with several Central Otago districts isolated by rising floodwaters

Physical CharacteristicLee Stream at the Main Highway Bridge recorded a discharge of 10300 cusecs (292 cumecs) from a catchment area of 71 sq miles (184 km^2)

Physical CharacteristicDeep Stream at the Main Highway Bridge recorded a discharge of 13000 cusecs (368 cumecs) from a catchment area of 91 sq miles (236 km^2)

Physical CharacteristicSutton Stream at the Main Highway Bridge recorded a discharge of 3200 cusecs (91 cumecs) from a catchment area of 57 sq miles (148 km^2)

Physical CharacteristicKye Burn at Kyeburn recorded a discharge of 3500 cusecs (99 cumecs) from a catchment area of 145 sq miles (376 km^2)

Physical CharacteristicLittle Kye Burn above Deep Creek recorded a discharge of 2141 cusecs (61 cumecs) from a catchment area of 16 sq miles (41 km^2)

Physical CharacteristicManuherikia at Ophir recorded a discharge of 14000 cusecs (396 cumecs) from a catchment area of 786 sq miles (2036 km^2)

Affected LifelineRoad arteries were severed with nearly every road in Otago affected by floodwaters

Affected LifelineThe main north road was impassable on the night of the 19th at Bushey and Maheno due to the Kakanui River spilling over its banks

Affected LifelineAt Goodwood and Wairunga flood water caused motorists trouble and at Hampden and Glenavy there was flood water

Physical CharacteristicAt Pigroot sections of the road had water up to 2 ft (61cm) deep and traffic had to turn back

Affected LifelineUpper Shag River bridge was washed away

Affected LifelineThere were no N.A.C. (National Airway Corperation) flights during the 19th

Affected LifelineThe main trunk line was washed out between Milton and Balclutha, at Allanton and at Puketeraki

Affected LifelineCentral Otago line was blocked for days by flooding and a number of slips. One slip at Christmas Creek was 500 yards long

Affected LifelineThe Roxburgh line was blocked at Waitahuna

Physical CharacteristicThe Catlins branchline was under 3.5 ft (1.07m) of water on one section

Affected LifelineOne railcar service and all road service buses from Dunedin to Cromwell were cancelled on the 20th

Affected LifelineAt one point the railway line had been dragged 3 ft 6 in (1.07m) out of place by the current and the ballast was scoured out in parts

DamageRiver and drainage works suffered extensive damage and severe erosion and slumping occurred at a number of places

Property DamageConsiderable damage occurred to public and private property

EvacueesSome areas were practically isolated and many houses and buildings were evacuated

Physical CharacteristicSouth Islands main trunk railway between Dunedin and Milton was submerged to depths of up to 6 ft (1.8m)

Affected LifelineRail traffic was disrupted for 10 days

Affected LifelineA road section between Lawrence and Roxburgh was still closed on the 27th where a bridge was swept away

Damage CostDamage to river and drainage works was of the order of £14000 ($604,300 2009 dollars)

Damage CostDamage estimated to total over £170,000 ($7,254,000 2009 dollars) for public and private property not including railway department losses. Included in property damage is the loss in revenue because of the break in services as well as the cost of hiring buses

Damage CostDamage estimated to be £100,000 ($4,267,000 2009 dollars) for State Highways and bridges (including replacing two Manuherikia and Shag River bridges and repairing Idaburn Bridge), clearing slips, repairing roads and large amount of general maintenance

Damage CostDamage estimated to be £30,000 ($1,280,000 2009 dollars) for river protection works and reconditioning

Damage CostDamage estimated to be £10,000 ($426,700 2009 dollars) for county road repairs throughout the province excluding Taieri County

Damage CostDamage estimated in Bruce County to be £750 ($32,000 2009 dollars)

Damage CostDamage estimated in Tuapeka County to be £1000 ($42,700 2009 dollars)

Damage CostDamage estimated in Clutha to be £1200 ($51,200 2009 dollars)

Damage CostDamage estimated in Waihemo to be £1200 ($51,200 2009 dollars)

Damage CostDamage estimated in Waitaki to be £1000 ($42,700 2009 dollars)

Damage CostDamage estimated in Vincent to be £500 ($21,300 2009 dollars)

Damage CostDamage estimated to be £10,000 ($426,700 2009 dollars) for private property repairs on Taieri Plain ( the place of greatest private property damage)

Damage CostConservative damage estimate of £20,000 ($853,500 2009 dollars) for crops and farm properties (not including houses) for the whole province

Damage CostEstimated £5,400 ($230,400 2009 dollars) for stock losses in the whole province

Stock DamageApproximately 700 sheep were lost along with a small number of cattle

Damage CostOne car insurance authority estimated £1,500 ($64,000 2009 dollars) for motorcar damage

CommentThere was substantial damage to the railway lines but no reliable estimate of damage costs was made by the Railways Department

CommentOn the 22nd all road and rail services north resumed and the main Central Otago highway through Lawrence was cleared

FloodingFlooding at Dunedin
Map Location: -45.87911 170.502707
Comments:

Affected LifelineDuring the flood road access to Dunedin was cut off to the north and south

Affected LifelineAll train and railcar services through Dunedin were cancelled on the 19th

Damage CostThe damage costs for Dunedin City were only a few pounds which were spent on minor slips and cleaning up of silt

ImpactOver a week after the flood there was still a backlog of goods waiting to be transported and a break in coal supplies from the south caused difficulties for Dunedin industries

FloodingFlooding at Oturehua
Map Location: -45.00708 169.91488
Comments:

Physical CharacteristicThe road between Oturehua and Poolburn had flood waters up to 2 ft 6 in (76cm) deep on the night of the 19th

Affected LifelineA bridge approximately half a mile from Oturehua was closed when its supports were washed away and approaches to another bridge in the area were undermined

Physical CharacteristicThe road between Oturehua and Ranfurly had 4 to 5 in (10 - 13cm) of water across it with some parts badly scoured

Affected LifelineOn the 27th a bridge was still out of use near Oturehua

FloodingFlooding at Waitati
Map Location: -45.744659 170.573352
Comments:

EvacueesA number of houses were evacuated at Waitati

FloodingFlooding at Riverside
Comments:

ImpactRiverside was one of the areas worst hit by flood waters on the 19th and it became a large sized lake within a few hours

Stock DamageAt Riverside approximately 100 sheep drowned when a floodbank burst on the night of the 19th

Stock DamageOne farmer lost 4 dairy cows

FloodingFlooding at East Taieri
Map Location: -45.898751 170.338476
Comments:

CommentEast Taieri was one of the areas worst hit by flood waters on the 19th

Affected LifelineThe narrow district between East Taieri bank and Henley flooded in the afternoon of the 19th including Main South Road and the main railway line

Physical CharacteristicAccumulated peak flows through and into the East Tairei area were considered to exceed 85000 cusecs (2407 cumecs)

CommentFlood levels in the East Tairei ponding area and the Allanton-Henley floodway were the highest ever recorded

CommentThere was still a lot of water around on the night of the 27th

FloodingFlooding at Taieri Plain
Map Location: -45.88401 170.253762
Comments:

CommentMany older inhabitants of Taieri Plains were predicting the flood to be "the worst ever"

CommentGeneral flooding occurred at Taieri Plain, particularly in lower lying areas. More than 5000 acres of rich farmland on the Tairei Plains were badly flooded with some areas under water for over a month

Crop DamageHeavy losses were sustained particularly in Taieri Plains where many valuable standing crops were ruined. Most serious loss to farmers was pasture, hay stacks and silage pits

CommentAt West Taieri Plain it was believed to be the worst flood crisis in 17 years

Peak River LevelAt Taieri Plains the Taieri River had a peak flood level of 19 ft 9 in (6.02m) at 5pm on 19th

Stock Damage420 sheep drowned

FloodingFlooding at Outram
Map Location: -45.859829 170.220115
Comments:

Peak River LevelThe Taieri River at Outram had a discharge of 71000 cusecs (2010 cumecs) from a catchment area of 1850 sq miles (4791km^2) (this was the highest recorded peak at that time with the river level 1 ft above 1940 flood level)

Affected LifelineTraffic was blocked at Outram bridge between Allanton, Macraes Flat and Hyde and the approach to the bridge between Hyde and Macraes Flat was washed out

CommentTwo farming families were rescued by a motorboat from a marooned houses near Outram bridge

Crop DamagePrivate potato crops suffered especially in Outram and Riverside but main crops were only lightly flooded

Physical CharacteristicAt Outram the Taieri River dropped to 18 ft 3 in (5.56m) at 2:20am on the 20th

CommentWater was lapping a few inches below window sills of at least one house near the Outram bridge

Heavy RainHeavy Rain at West Taieri
Comments:

Physical CharacteristicWest Taieri recorded 0.68 in (1.73cm) of rain up to 12am on the 18th

Physical CharacteristicWest Taieri recorded 1.48 in (3.76cm) up to 6am on the 19th

Physical CharacteristicWest Taieri recorded 0.74 in (1.88cm) of rain in six hours from 6am to 12pm on the 19th

FloodingFlooding at Otokia
Map Location: -45.949801 170.189367
Comments:

Physical CharacteristicAt Otokia the Taieri River was approximately 4 in (10cm) from the top of the bank

Affected LifelineMain South Road and the railway line was still impassable at Otokia on the 22nd

FloodingFlooding at Allanton
Map Location: -45.918208 170.25344
Comments:

Comment60 volunteers sandbagged approximately 10 chains (200m) of riverbank near Allanton

Stock DamageOne Allanton farmer lost nearly 200 stud ewes and lambs which were swept away and drowned

FloodingFlooding at Woodside
Map Location: -45.85912 170.17628
Comments:

CommentThe Contour Channel had two minor breaches near Woodside

ImpactA sizeable area was flooded between the breached Contour Channel and Lee Creek forming a broad lake of muddy water which covered fence posts

FloodingFlooding at Mosgiel
Map Location: -45.882205 170.333108
Comments:

CommentSilver Stream overflowed its banks below Mosgiel

FloodingFlooding at Maniototo Plain
Map Location: -45.151841 170.039107
Comments:

Affected LifelineManiototo Plains had considerable surface water in lower lying areas and several roads were covered with inches of water

CommentAll creeks and rivers flowing into the Taieri River were swollen with most running high

FloodingFlooding at Pigroot
Map Location: -45.20809 170.43034
Comments:

Affected LifelineAccess to Pigroot was blocked at Kyeburn and the Kyeburn to Danseys Pass road was blocked

FloodingFlooding at Patearoa
Map Location: -45.27289 170.054672
Comments:

Affected LifelineThe roads from Patearoa to Ranfurly and from Patearoa to Waipiata had water in places

Affected LifelineThe road from Paerau to Patearoa was blocked on the 19th

Physical CharacteristicThe Taieri River was rising at rate of 1 in (2.54cm) an hour on the night of the 19th

Physical CharacteristicThe Taieri River was about 2 miles (3.22km) wide at several points

FloodingFlooding at Taieri River
Comments:

CommentTaieri River and its tributaries were still swollen with melting snow from mountains on the 21st

FloodingFlooding at Middlemarch
Map Location: -45.508281 170.125395
Comments:

Affected LifelineThe road between Middlemarch and Macraes Flat was impassable

FloodingFlooding at Strath Taieri Plain
Map Location: -45.488248 170.11614
Comments:

Physical CharacteristicAll land adjoining Taieri River flooded in Strath-Taieri basin and many tributary creeks in the district were overflowing

Stock DamageHundreds of sheep and lambs were lost and several farmers had stock marooned on islands within the flood waters

Stock DamageOne farmer lost 108 lambs

Property DamageHundreds of feet of fencing was destroyed

Property DamageStrath Tairei was badly affected with inundation with the biggest losses from fencing but stock losses were light

Stock Damage160 sheep drowned

FloodingFlooding at Catlins
Map Location: -46.489995 169.721959
Comments:

CommentFlooding occurred at Huipapa, Tawanui and Kahuika and the Catlins River was in flood

Affected LifelineA small bridge over a tributary swept away

LandslideLandslide at Otago Harbour
Map Location: -45.84009 170.59708
Comments:

Affected LifelineElectricity cut twice to towns from Ravensbourne to Sawyers Bay

ImpactThe bank at Black Jack's Point on the road from Dunedin to Port Chalmers gave way on the morning of the 19th. Huge boulders and earth crashed onto road bringing down wiring and leaving power poles leaning. Barely after the wiring from the first slip had been fixed, a second slip brought wiring down again

FloodingFlooding at Milton
Map Location: -46.123263 169.966084
Comments:

CommentIt was the heaviest flooding in Milton for several years

CommentTokomairiro River overflowed in several places

Physical CharacteristicWithin the Clarksville district there was a two mile (3.22km) ribbon of water which was 2 ft (61cm) deep in places

Affected LifelineThe Moneymore area and all the land east of the main south highway were under water

Physical CharacteristicThe road between Milton and Central Otago had 2 ft 6 in (76.2cm) water covering the road, the approach to the new Glenore bridge was washed out and power poles were washed out

Physical CharacteristicWater in the streets was up to 18 in (45.7cm) deep

Stock DamageNo stock losses reported

ImpactIsolated settlers were able to get out at 12pm on 21st when the water receded

FloodingFlooding at Toko Mouth
Map Location: -46.22126 170.04232
Comments:

ImpactToko Mouth was isolated by a sea of water

FloodingFlooding at Lovells Flat
Map Location: -46.174409 169.837707
Comments:

ImpactLovell's Flat was cut off on the night of the 19th

FloodingFlooding at Lawrence
Map Location: -45.914289 169.691279
Comments:

CommentFire bell warned people early on 19th morning of the flood

Affected LifelineWetherston Creek was in high flood, it breached its banks and it poured through the railway embankment into a sludge channel causing approximately 3 chains (60m) of railway line to be left hanging in midair

CommentWetherston Creek silted up its channels at Wetherstone and flowed down the County Road.

Physical CharacteristicWetherston Creek was falling by 5pm of the 19th

Physical CharacteristicLawrence recorded 4.85 in (12.3cm) of rain over the 18th and 19th

FloodingFlooding at Waitahuna
Map Location: -45.986063 169.747236
Comments:

CommentThe flood in Waitehuna was reported as the worst flood in memory

CommentHeavy rain flooded creeks and the Pomahaka River in the Tapanui and Heriot area

Physical CharacteristicShopping area at Waitehuna was under 2-3 ft (61 - 91cm) of water at the height of the flood

Affected LifelineRoads adjacent to Waitahuna and other smaller tributaries were damaged

Stock DamageOne Glenore farmer lost approximately 500 sheep but otherwise stock losses were light

Heavy RainHeavy Rain at Oamaru
Map Location: -45.087138 170.980874
Comments:

Physical CharacteristicOamaru recorded 2.14 in (5.44cm) of rain overnight of the 18th to the 19th

FloodingFlooding
Comments:

Affected LifelineThe area worst affected was north of Orana Park where the water was over the main northern highway in several places

Physical CharacteristicOamaru Creek was only 2 ft (61 cm) below Severn Street bridge at 12pm on the 19th and was still rising

ImpactLarge drains on either side of Thames highway were unable to cope and properties were flooded

DamageOne petrol station had to write off petrol stocks because water filtered into the tanks

Affected LifelineWaiareka Creek Bridge was damaged south of Oamaru and Upper Kauru Bridge was also damaged

Affected LifelineThe main highway north of Hampden was under 1 ft (30.5cm) of water, the Kakanui-Waianakarua highway was blocked by a slip, Maheno-Kakanui Road had water over a considerable distance of it

Maritime / CoastalMaritime / Coastal
Comments:

DamageHeavy seas pounded Oamaru breakwater and coastline causing some erosion

FloodingFlooding at Elderslie
Map Location: -45.024652 170.832594
Comments:

Physical CharacteristicNgapara Road at Elderslie was blocked with 2-3 ft (61-91cm) of water

FloodingFlooding at Papakaio
Map Location: -44.98893 170.97533
Comments:

Affected LifelinePukeuri to Kurow road was blocked in several places at Papakaio

FloodingFlooding at Shag River
Comments:

CommentShag River was high on the night of the 19th and was almost up to the 1946 record height at Dunback

FloodingFlooding at Palmerston
Map Location: -45.483857 170.721017
Comments:

Affected LifelineThe Dunback to Palmerston road was impassable late on the night of the 19th

CommentHeavy rain fell on the night of the 18th and on the 19th but there was little local flooding

FloodingFlooding at Shag Point
Map Location: -45.460411 170.814648
Comments:

Affected LifelineAt Shag Point there were slips on railway line and the road

FloodingFlooding at Wairunga
Map Location: -45.5158 170.69738
Comments:

Physical CharacteristicAt Wairunga the road was flooded by 2 ft (61cm) of stormwater

FloodingFlooding at Waronui
Map Location: -46.16934 169.9833
Comments:

ImpactOne man was marooned on horseback overnight by rapid rise of the Tokomairiro River

FloodingFlooding at Balclutha
Map Location: -46.23013 169.733472
Comments:

CommentThe Clutha River was several ft above normal late on the night of the 19th and was still rising. It gave rise to serious flooding in the lower Clutha

Peak River LevelThe Clutha River reached a peak height of 69 ft (21m) at Balclutha at 11pm on 20th

Physical CharacteristicThe Clutha River fell to 66 ft 6 in on 21st night (but was still 6.5 ft (2m) above normal)

Physical CharacteristicDischarge from the Clutha River at Balclutha on the 19th was 73000 cusecs (2010 cumecs) over a catchment area of 7840 sq miles (20,306km^2)

CommentBelow Balclutha the Inchclutha stopbanks overtopped at Dales and the Kaitangata bank blew out

CommentFlooding occurred in the Matau and Otanomomo districts

Damage CostPronounced erosion and slumping occurred especially at the Matau branch of Clutha and Tuapeka River with an estimated cost of repairs of £10,000 ($431,600 2009 dollars)

CommentAt Inchclutha there was mainly surface flooding caused by the high river level backing up drainage outlets and tributary flows

FloodingFlooding at Waitepeka
Map Location: -46.28707 169.67122
Comments:

CommentThe Puerua River overflowed across the flax swamp and invaded the Waitepeka settlement

FloodingFlooding at Kelso
Map Location: -45.905986 169.231867
Comments:

CommentPomahakaka River overflowed into Kelso township and its tributary, the Swiftburn, overflowed into Heriot

FloodingFlooding at Waikoikoi
Map Location: -46.004822 169.154311
Comments:

CommentWaikoikoi Creek overflowed into Waikoikoi settlement

FloodingFlooding at Barnego
Map Location: -46.229256 169.717954
Comments:

CommentBarnego experienced some surface flooding during the 21st

CommentBarnego stopbank was breached and Barnego Flat was inundated

Stock DamageSome stock losses at Barnego but only a fraction of losses that occurred from previous floods

FloodingFlooding at Henley
Map Location: -45.981427 170.16589
Comments:

Evacuees27 refugees were at the White House Hotel (22 adults, 5 children) in cramped upper rooms for over 36 hours with no electricity or phone communication. They had been rescued from nearby houses, farms and stranded vehicles and Red Cross brought emergency supplies to them

Affected LifelineOn the 21st the water still several feet deep along the road and water was still lapping over windowsills of some houses

DamageMany houses were in a sodden and filthy condition

ImpactAt the Henley Hotel 20 people were still isolated on the 22nd

DamageOne house along Taieri River was devastated by flood. It was a complete loss with one wall forced out by water, a watermark on walls 3 ft 7 in from floor, inches of silt in house, household goods strewn across fields and stock scattered, starving or marooned in islands

FloodingFlooding at Maniototo Plain
Map Location: -45.151841 170.039107
Comments:

Affected LifelineManiototo Plain was one of the hardest hit areas. Swollen streams and the Taieri River swept away approaches to bridges and scoured out roads

Damage CostDamage estimated at £10,000 ($431,600 2009 dollars)

Affected LifelineFlooding diminished on the 21st with hardly a bridge or road left untouched

CommentOne of most destructive floods for years

Affected LifelineSeveral small townships were completely isolated at height of flood and Maniototo Plains were cut off from coast until the afternoon of the 21st

Affected LifelineBridges unusable were Sowburn, Styx, Roberts Bridge, two bridges on Kyeburn Diggings Road, Hayes Bridge at Oturehua, Dunstan Bridge and Manuherikia Bridge

DamageUnsealed roads were badly scoured and recently sealed parts were also severely damaged. The repairs were expected to take months with some sections of the road having to be reformed completely and approaches to bridges renewed

FloodingFlooding at Waipiata
Map Location: -45.181718 170.164281
Comments:

DamageThere was severe damage in Waipiata

Peak DischargeThe maximum flood recorded at Waipiata for the Taieri River was a discharge of 278 cumecs over a catchment area of 1865km^2 on the 21st

FloodingFlooding at Kokonga
Map Location: -45.210004 170.246345
Comments:

Peak River LevelIn Kokonga the flooding was still severe on the 21st and the Taieri River reached its highest ever level of 8 ft (2.44m) above normal

Affected LifelineSeveral houses and the railway station was swirling with water

FloodingFlooding at Ranfurly
Map Location: -45.131163 170.112657
Comments:

Affected LifelineThe bent bridge between Ranfurly and Omakau was impassable

Affected LifelineDamage occurred to the Ranfurly water supply system with approximately 300 yards of the main supply pipe swept away. Water was cut off in town on the 20th and they were left with a limited supply

Heavy RainHeavy Rain at Alexandra
Map Location: -45.253862 169.375391
Comments:

ImpactGalloway area was isolated by water from the flooding Manuherikia River on the 20th

Affected LifelineThe bridge linking Galloway and Alexandra was damaged

CommentManuherikia River dropped about 6 ft on the morning of the 21st but a slight rise in river level occurred again in the late afternoon

Heavy RainHeavy Rain at Roxburgh
Map Location: -45.54246 169.300336
Comments:

Physical CharacteristicRoxburgh recorded 2.24 in (5.7cm) at Blackstone Hill from the 18th to the 20th

CommentThe Clutha River at Roxburgh was still running high and dirty on the 21st

Heavy RainHeavy Rain at Queenstown
Map Location: -45.041441 168.645105
Comments:

CommentLake Wakatipu was high on the 21st from melted snow

Heavy RainHeavy Rain at Berwick
Map Location: -45.944896 170.106376
Comments:

CommentConsiderable areas around Berwick were inundated by backed up waters from Lakes Waipori and Waihola

Heavy RainHeavy Rain at Cardrona
Map Location: -44.879797 168.99807
Comments:

Physical CharacteristicCardrona 1.01 in (2.57cm) from the 18th to the 20th

Heavy RainHeavy Rain at Tapanui
Map Location: -45.945409 169.268023
Comments:

Physical CharacteristicTapanui 4.71 in (11.96cm) from the 18th to the 20th

References

Hydrology Annual, No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand.
Hydrology Annual, No.5 1957, Soil Conservation and Rivers Control Council, Wellington, New Zealand.
O:\RSKD102\RawData\Archives\Documentation\1957-05-18th-21st South Island FloodingTable
Major weather events in New Zealand, FLOODS and HIGH RAINFALL, to 31st May 2006.
Headline: Deluge At Oamaru Floods Properties.
Otago Daily Times, 20 May 1957.
Headline: Farmer Sits Fast On Horse.
Otago Daily Times, 20 May 1957.
Headline: Flooding In Province: Desperate Battle Against Taieri.
Otago Daily Times, 20 May 1957.
Headline: Heavy Flooding Around Milton.
Otago Daily Times, 20 May 1957.
Headline: Lawrence.
Otago Daily Times, 20 May 1957.
Headline: Many Districts Isolated By Rising Floodwaters.
Otago Daily Times, 20 May 1957.
Headline: Rescued
Otago Daily Times, 20 May 1957.
Headline: Shag River.
Otago Daily Times, 20 May 1957.
Headline: Train Services.
Otago Daily Times, 20 May 1957.
Headline: Volunteers Stave Off Immediate Threat.
Otago Daily Times, 20 May 1957.
Headline: Wires Down.
Otago Daily Times, 20 May 1957.
Headline: Crop Losses.
Otago Daily Times, 22 May 1957.
Headline: Floods Recede: Taieri And Clutha Falling Steadily.
Otago Daily Times, 22 May 1957.
Headline: Red Cross Brings Aid To Flood Refugees.
Otago Daily Times, 22 May 1957.
Headline: Taieri Crisis Eases With Receding Flood.
Otago Daily Times, 22 May 1957.
Headline: Two Hundred Stud Sheep Drowned.
Otago Daily Times, 22 May 1957.
Headline: Widespread Damage Caused By Flooding In Maniototo.
Otago Daily Times, 22 May 1957.
Headline: Family Escapes Narrowly As Flood Ruins House.
Otago Daily Times, 24 May 1957.
Headline: Flood Cost Otago Over £170,000.
Otago Daily Times, 28 May 1957.
Headline: South Line May Open Tomorrow.
Otago Daily Times, 28 May 1957.
Headline: Worst Break.
Otago Daily Times, 28 May 1957.
Owen, R.E. (1969). Hydrology Annual No.16, 1968. Soil Conservation and Rivers Control Council. Wellington, NZ: The Ministry of Works.