Retaruke River

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Retaruke River
Retaruke River from Whakahoro Bridge.jpg
The Retaruke River from Lacy's Bridge in Whakahoro
Retaruke River
Native nameRetaruke (Māori)
Location
Country New Zealand
Region Manawatū-Whanganui
District Ruapehu
Settlements Kaitieke, Whakahoro
Physical characteristics
Source Erua Forest
  location2km south west of National Park
  coordinates 39°10′59″S175°22′52″E / 39.18306°S 175.38111°E / -39.18306; 175.38111
  elevation870 m (2,850 ft)
Mouth Whanganui River
  location
Whakahoro
  coordinates
39°6′29″S175°4′12″E / 39.10806°S 175.07000°E / -39.10806; 175.07000
  elevation
110 m (360 ft)
Length64 km (40 mi)
Basin features
ProgressionRetaruke RiverWhanganui River
River system Whanganui River

The Retaruke River is a river in the North Island of New Zealand. It joins with the Whanganui River at Whakahoro just above Wade's Landing and downstream from Taumarunui. The river flows through the farming communities of Upper and then Lower Retaruke Valley. Downstream from this junction is the Mangapurua Landing with its Bridge to Nowhere, servicing the ill-fated Mangapurua Valley farming community.

Contents

Sources

The river source is located 2 km (1.2 mi) south west of National Park in the Erua Forest. The river initially flows south west through the forest before bending to flow north west. [1]

Retaruke River gorge at Ngamoturiki Retaruke River gorge at Ngamoturiki.jpg
Retaruke River gorge at Ngamoturiki

Geology

Most of the valley is made up of Early Miocene Mahoenui Group rocks. About 65,000 years ago movement of the Waimarino Fault probably allowed capture of the Waimarino Stream and/or Makatote River by the Manganuiateao River, which would have reduced erosion by ending the incidence of lahars and reducing flows in the Retaruke River. [2]

Coal was discovered in 1909 [3] in the Late Miocene Whangamomona Group. During the 1960s [4] and 1970s, an opencast coal mine operated at the top end of Retaruke Road. [5] Between 1938 and 1984 it produced about 3,000 tons of coal. [6]

Upper Retaruke valley community

1 kilometre up the Upper Retaruke Valley road is the location of the annual Kaitieke Collie club sheepdog trials. Next is the location of a "Victory Hall". Further up the valley there was a coal mine, and it was along the upper Retaruke river that fossil whalebones were found by Ken McNaught.[ citation needed ]

Kaitieke County

The Retaruke valley is contained within the original Kaitieke County.

This county was created by the Kaitieke County Act 1910 [7] from portions of Waimarino and West Taupo Counties. Its eastern boundary was the Main Trunk line from Erua to Taumarunui, and its western boundary was the Whanganui River down to Te Auroa, about 7 km (4.3 mi) east of Waitotara. Other settlements in the county included Manunui, Raurimu, Ōwhango, Kakahi, and Piriaka. [8] Manunui Town Board was split from the county in 1911 [9] and the county became part of Taumarunui County in 1956. [10]

The Kaitieke Council Chambers were located at Raurimu near the old Raurimu District High School.

The Kaitieke County stockyards are located at the junction of the Upper and Lower Retaruke Roads 39°05.55′S175°14.87′E / 39.09250°S 175.24783°E / -39.09250; 175.24783 . There stands the World War I memorial, a set of stockyards for auctioning of sheep stock, and a defunct manual telephone exchange. Previously in near proximity to the stockyards, there was a postal depot, a general store and then an automatic telephone exchange.

Lower Retaruke valley community

Portions of the Lower Retaruke Valley were settled about 1900 by government run farm ballot. Other portions were independently purchased from the Māori community. The land was then cleared, grassed, and sheep flocks herded in from Raurimu to stock the hills.

The valley previously had a tiny Mangaroa Primary School( 39°7.22′S175°8.06′E / 39.12033°S 175.13433°E / -39.12033; 175.13433 ). At a location further up there still remain the community hall and sports field, here there are annual children's Christmas parties, occasional Dances/Social and the annual Retaruke Easter Sports Day are run.

Access to the Valley is via three main roads: Oio Road, Kawautahi Road or the Raurimu-Kaitieke Road from Raurimu. However, on foot the valley can be accessed via the old Mangapurua Road, or by jetboat or via the Whanganui River. (Other access routes such as the Kokako Road & Kuotoroa East Road (to Ruatiti), Te Mata Road from Whakahoro to Taumarunui have long since been abandoned. Some of these roads were examples of pack horse tracks that were expanded to roads during the Great Depression 1930s as job creation schemes.)

Historically, the wealth of the valley has come from the production of wool. Early on there were also some small dairy farms producing cream/"butterfat" for the Kaitieke dairy factory that was located in Piriaka near Taumarunui.

Reserves

The Retaruke valley has several scenic reserves. Hautonu 9 acres (3.6 ha), Papapotu 28 acres (11 ha), Ngataumata 7 acres (2.8 ha), Ngamoturiki 12 acres (4.9 ha) and Rotokahu 312 acres (126 ha) were gazetted in 1913 [11] and Ngamoturiki 12.5857 ha (31.100 acres) in 1979. [12] The original vegetation was mainly rimu, rata, tawa, hinau, rewarewa, hard beech, and kamahi. [13] Since about 1960, many kamahi around the headwaters of the river have died. The highest and steepest hills in the Retaruke catchment have residual tawa-dominated stands or secondary growth of kamahi and some kanuka and rewarewa. The rest of the valley was largely converted from native bush to pasture in about 40 years from the 1880s. [14]

Tributaries

Tributary NameLength (km)km From Mouth Confluence Coordinates Altitude
Near Erua Road River source 39°15.60′S175°20.58′E / 39.26000°S 175.34300°E / -39.26000; 175.34300
39°05.31′S175°14.66′E / 39.08850°S 175.24433°E / -39.08850; 175.24433
Kawautahi Stream 39°04.22′S175°13.11′E / 39.07033°S 175.21850°E / -39.07033; 175.21850
Whanganui River River Mouth 0 km 39°06.65′S175°03.98′E / 39.11083°S 175.06633°E / -39.11083; 175.06633

Climate

Climate data for Lower Retaruke (1991–2020)
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Mean daily maximum °C (°F)23.6
(74.5)
23.9
(75.0)
22.1
(71.8)
18.4
(65.1)
15.1
(59.2)
12.6
(54.7)
12.0
(53.6)
13.2
(55.8)
14.9
(58.8)
17.2
(63.0)
19.4
(66.9)
21.9
(71.4)
17.9
(64.1)
Daily mean °C (°F)17.7
(63.9)
18.0
(64.4)
16.0
(60.8)
12.9
(55.2)
10.4
(50.7)
8.2
(46.8)
7.6
(45.7)
8.5
(47.3)
10.3
(50.5)
12.2
(54.0)
13.9
(57.0)
16.4
(61.5)
12.7
(54.8)
Mean daily minimum °C (°F)11.8
(53.2)
12.0
(53.6)
9.8
(49.6)
7.4
(45.3)
5.6
(42.1)
3.7
(38.7)
3.1
(37.6)
3.8
(38.8)
5.7
(42.3)
7.3
(45.1)
8.3
(46.9)
10.9
(51.6)
7.5
(45.4)
Average rainfall mm (inches)93.6
(3.69)
99.4
(3.91)
88.2
(3.47)
123.4
(4.86)
133.7
(5.26)
137.7
(5.42)
153.7
(6.05)
162.4
(6.39)
154.9
(6.10)
145.0
(5.71)
126.2
(4.97)
145.9
(5.74)
1,564.1
(61.57)
Source: NIWA [15]

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References

  1. "Retaruke River, Manawatu-Wanganui". NZ Topo Map. Retrieved 27 June 2021.
  2. Jerome A. Lecointre, Vincent E. Neall & Alan S. Palmer (1998). "Quaternary lahar stratigraphy of the western Ruapehu ring plain". doi: 10.1080/00288306.1998.9514807 .{{cite journal}}: Cite journal requires |journal= (help)
  3. "AtoJs Online — Appendix to the Journals of the House of Representatives — 1910 Session I — C-09 NEW ZEALAND GEOLOGICAL SURVEY (FOURTH ANNUAL REPORT (NEW SERIES) OF THE)". atojs.natlib.govt.nz. 1910. Retrieved 27 June 2021.
  4. Hay, R. F. (1965). "Coal measures in the upper Retaruke Valley". doi: 10.1080/00288306.1965.10428167 .{{cite journal}}: Cite journal requires |journal= (help)
  5. "1:63360 map Sheet: N111 Waimarino". www.mapspast.org.nz. 1977. Retrieved 27 June 2021.
  6. Steve Edbrooke (1998). "Mineral Commodity Report 18" (PDF). Institute of Geological and Nuclear Sciences.
  7. "Kaitieke County Act 1910 (1 GEO V 1910 No 33)" . Retrieved 11 February 2013.
  8. "KAITIEKE. AUCKLAND STAR". paperspast.natlib.govt.nz. 7 May 1913. Retrieved 15 August 2020.
  9. "Manunui Town Board/Town Council | Archives Central". archivescentral.org.nz. Retrieved 15 August 2020.
  10. "Taumarunui County Council". archivescentral.org.nz. Retrieved 15 August 2020.
  11. "New Zealand Gazette" (PDF). 22 May 1913.
  12. "New Zealand Gazette" (PDF). 25 October 1979.
  13. "Bibliography of plant checklists for areas in Whanganui Conservancy" (PDF). March 2010.
  14. "Newsletter" (PDF). New Zealand Botanical Society. June 2001.
  15. "CliFlo – National Climate Database : Lower Retaruke Cws". NIWA. Retrieved 20 May 2024.