By Roselyn Fauth
Drive south out of Timaru today and the Ōtipua Wetlands can feel as though they have always looked this way: water, raupō, native plantings, birds and walking tracks tucked between the city and coast.
But the four-hectare lake we walk around today is relatively new. The bigger story is much older.
Ōtipua was once part of a 60–70 hectare coastal lagoon, trapped behind the gravel beach. Over generations that landscape was used, drained, flooded, engineered, converted into an aerodrome and partly filled. Then, in the 1990s, local people made a very different decision: instead of continuing to remove the wetland, they would begin bringing part of it back.
It makes Ōtipua much more than a nice place for a walk. It is a story about how our relationship with the landscape has changed...
Ōtipua Wetlands used to be a huge lagoon separated from the coast by a gravel spit. It is a place rich with fish and bird life. A food basket for takata whenua, especially tuna (eel. harakeke, pingao, raupo for weaving and mokihi. The early settlers of the area lived on kokopu. The saltwater catchment goes right up to the to top of Mt Horrible, Claremont, Rosebrook and Fairview. A huge effort has gone into the wetlands to restore them. All vegetation sourced locally with native species to match the three underlying eco systems. Wetland, shrub land and forested areas. Learn more here: https://www.wuhootimaru.co.nz/coastal-walkway-and-wetlands
A place of food, resources and connection
Long before the modern restoration project, Ōtipua Creek and its wetland were important to Kāti Huirapa.
An 1880 record by Ngāi Tahu kaumātua identified Ōtipua Stream as culturally significant. Temporary and permanent pā-tuna, or eel weirs, were used along both branches of Ōtipua Creek to catch tuna. The wetland was a rich source of fish and birdlife, as well as mahika kai resources including harakeke, pīngao and raupō. Ōtipua Creek was also part of an ara tawhito, an old travel route.
The area continued to be a gathering place as colonial Timaru developed. On 14 January 1863, more than 100 people gathered on the Ōtipua flat beside the lagoon to celebrate the anniversary of the arrival of the Strathallan. There was cricket, horse racing, quoits, foot racing and even a competition to catch a pig with a greased tail. So, more than 160 years ago, people were already coming together beside this lagoon.
Then people began trying to drain it
By the 1890s, the prevailing attitude towards wetlands was very different. Rather than seeing the lagoon primarily as habitat, people increasingly saw wet ground as something that could be drained and made useful.
In 1894, Timaru Borough Council sat as the Ōtipua Domain Board and formed a committee to approach neighbouring landowners about helping with drainage. Later that year engineers Meason and Marchant were asked to take levels and report on how the lagoon might be drained.
In 1895 Parliament passed the Timaru Public Park and Garden Domain Reserve and Otipua Domain Reserve Vesting Act, formally vesting the domain in the Borough of Timaru.
The following year came a much more ambitious idea: build a culvert beneath the shingle spit separating the lagoon from the sea. The work was expected to cost between £400 and £500. A tender was received, but councillors changed course and returned it unopened.
The problem, however, did not disappear. A lagoon that kept reminding people it was there. Ōtipua's water was naturally held back by the coastal gravel barrier. Heavy rain could therefore transform the lagoon very quickly.
In October 1900, when the lagoon filled and began flooding nearby Chinese market gardens, the gardeners cut an opening through the beach so the floodwater could escape to the sea.
Two years later it happened again. In March 1902, the lagoon rose over the Chinese gardens and the main road. Around midnight, the gardeners went out by moonlight and cut through the beach. Once the water began flowing, it scoured out a channel about four chains wide, dropping the lagoon level by three or four feet.
Meanwhile, government money was being sought to solve the drainage problem permanently. In 1901, £300 was placed on the Estimates to help Timaru Borough Council drain Ōtipua Lagoon.
For decades, the question was essentially: how do we control this water?
From lagoon to aerodrome
The landscape changed dramatically again in the 1930s. Public Works records show that plans were prepared in 1936 for an extended aerodrome at Saltwater Creek, Timaru. By 1937 major construction was under way. Ōtipua Stream was diverted and stop-banked and an outlet culvert was being built.
By 1938 around 192,600 cubic yards of material had been excavated and replaced. The flying field had been ring-drained and stop-banked, a major subsoil drainage system installed, and about 50 acres levelled and grassed.
A later study of Redruth records the extraordinary sequence plainly: the flat land north of Saltwater Creek had once been Ōtipua Lagoon, then became Timaru's airfield, and from the 1940s the area developed a long association with solid-waste disposal. Lagoon... airfield... dump. That is an extraordinary amount of change within a few generations.
Then the thinking changed
By the early 1990s, people began looking at Ōtipua differently again. Instead of asking how the wetland could be drained or filled, the question became: What could we restore?
Timaru District Council records say a Working Party was formally established in 1994. The Trust's later history panels give 1993, while Environment Canterbury records water-level monitoring beginning in 1993, so the safest interpretation is that organised investigation and community action were building through 1993–94, with the Working Party formally established in 1994.
In 1995, a weir was constructed near the coastal barrier. Its purpose was not simply to dam the creek, but to stop Saltwater Creek completely draining whenever the mouth was opened to the sea. Ports in the structure allowed water exchange and fish passage.
In 1996, restoration of the Ōtipua Wetland was adopted as a Year 2000 project. Then came one of the most important steps.
A community sets out to recreate a wetland
In February 1997, Lucas Associates produced a detailed plan for Ōtipua. Its description was simple and ambitious: a community project to re-create a wetland benefiting wildlife, the environment and people.
That same year the Ōtipua Wetland Charitable Trust was formed. Land was purchased and volunteers, schools, community groups, councils and conservation organisations became involved in the restoration.
The Trust's 2016 history panels record the next major milestone. In 1999, a four-hectare lake was excavated and filled with water. The first planting day followed, with 450 plants put in by 40 community members. The lake was therefore not simply a remnant that happened to survive untouched. People deliberately created it as part of a much bigger effort to restore some of the ecological character of the old Ōtipua lagoon.
Protecting what had been brought back
Restoration did not stop with digging the lake. In 2005, a conservation covenant was placed over the Trust's land to protect its natural environment, landscape, wildlife, freshwater and marine habitat and historical values. The covenant would continue to bind future owners. Further restoration extended towards the coast. In 2012 and 2013, native back-dune restoration projects were funded around the mouth of Saltwater Creek. Stage two planned another 2,000 plants after more than 3,500 had been planted the previous year with a reported survival rate of over 90 per cent.
Then, in 2016, the Trust formally presented the approximately 19-hectare wetland to Timaru District Council. The property included the four-hectare lake and more than three kilometres of tracks. The community had taken a heavily modified fragment of an old lagoon system, protected it, planted it and returned it to public stewardship.
As well as walking, cycling, rowing at Salt Water Creek and Ōtipua Wetlands, have you had
Restoration is still happening
The story did not finish with the handover. In 2019, Ara students worked with Timaru District Council on predator monitoring and trapping at Ōtipua. Around 30 students were involved and 25 traps were installed as part of efforts to improve habitat for birds.
Today Environment Canterbury describes Ōtipua as a collection of different habitats, ranging from saline lagoon and mudflats to raupō swamp, shrubland and developing swamp forest. Birds recorded there include royal spoonbill, pied stilt, scaup, paradise shelduck, white heron, black-billed gull and marsh crake.
That is quite a turnaround for land that earlier generations repeatedly tried to drain.
Ōtipua Wetlands timeline
Before European settlement – Ōtipua Creek and wetland are an important Kāti Huirapa cultural landscape and mahika kai. Pā-tuna are used along both branches of the creek and wetland plants are harvested.
1863 – More than 100 people gather beside Ōtipua Lagoon for Strathallan anniversary celebrations, including cricket and horse racing.
1894 – Ōtipua Domain Board begins investigating drainage. Engineers Meason and Marchant are commissioned to report on draining the lagoon.
1895 – Parliament formally vests the Ōtipua Domain in the Borough of Timaru.
1896 – A culvert beneath the coastal shingle spit is proposed, estimated at £400–£500, but does not proceed.
1900 – Floodwater threatens market gardens and an opening is cut through the beach to release the lagoon.
1901 – Government sets aside £300 to assist with draining Ōtipua Lagoon.
1902 – Another major flood leads gardeners to cut through the beach again, creating an outlet about four chains wide.
1936–38 – Major engineering transforms part of the lagoon landscape into Timaru's aerodrome. Ōtipua Stream is diverted and stop-banked and extensive drainage and earthworks are carried out.
1940s onward – Parts of the former lagoon and airfield landscape become associated with Redruth waste disposal.
1993–94 – Water monitoring and organised action gather momentum. Council records the Working Party as formally established in 1994.
1995 – A weir is constructed near the beach barrier to help manage Saltwater Creek water levels while allowing water exchange and fish passage.
1996 – Wetland restoration is adopted as a Year 2000 project.
1997 – Lucas Associates prepares a restoration plan and the Ōtipua Wetland Charitable Trust is formed.
1999 – A four-hectare lake is excavated and filled. Forty community members plant 450 plants at the first planting day.
2005 – A conservation covenant protects the wetland's ecological, landscape and historic values.
2012–13 – Native dune restoration extends around the mouth of Saltwater Creek.
2016 – The approximately 19-hectare wetland is formally transferred to Timaru District Council.
2019 – Ara students and Council expand predator monitoring and trapping.
Today – Ōtipua supports a diverse mix of wetland habitats and birdlife and remains an important recreational and ecological space on Timaru's southern edge.
Perhaps the most important part of the story
Ōtipua wasn't simply “created in 1999.”
A wetland landscape was already here.
People used it.
People tried to drain it.
People engineered it.
Parts were filled.
And eventually people decided some of it was worth bringing back.
That shift in thinking may be the most interesting part of all. The people who planted those 450 plants in 1999 weren't only planting trees and wetland species. They were helping change the direction of a story that had been unfolding for more than a century. And every time we walk around that lake today, we are walking through the result.
Download Ōtipua Wetlands and the Coastal Track map here A4.pdf
Sources
Kāti Huirapa cultural values for Ōtipua Creek, including the 1880 record, pā-tuna and mahika kai resources: Timaru District Council cultural-values report
1863 gathering beside Ōtipua Lagoon: Lyttelton Times, 21 January 1863, Papers Past
1894 drainage discussions: South Canterbury Times, 28 August 1894 and 11 December 1894
1895 Ōtipua Domain legislation: New Zealand Legislation
1896 culvert proposal: Star, 26 March 1896, Papers Past
1900 and 1902 lagoon flooding: South Canterbury Times, 18 October 1900 and Timaru Herald, 25 March 1902
1930s Timaru aerodrome engineering: 1937 Public Works Statement and 1938 Public Works Statement
Former lagoon, airfield and Redruth waste history: Redruth case study
1994 Working Party, 1996 Year 2000 project and transfer history: Timaru District Council, Future of Otipua Wetland, 2014
1995 weir and Saltwater Creek water management: Environment Canterbury/TDC technical report, 2017
Original 1997 restoration plan: Lucas Associates, Otipua Wetland, Saltwater Creek, Timaru
Trust, 60–70 ha historic lagoon and restoration: Department of Conservation, Canterbury wetlands
2005 covenant and 2016 transfer: Timaru District Council, Otipua Wetland transfer report, 2016
Current ecology and birdlife: Environment Canterbury, Ōrāri Temuka Ōpihi Pareora biodiversity
2019 predator-control project: Ara Institute of Canterbury
Ōtipua Wetlands History panels, 2016, supplied in the original images, particularly for the 1993, 1995, 1996, 1997, 1999 and 2016 restoration milestones.