River & Drainage Schemes

The river management team at Horizons is responsible for maintaining the river and drainage systems in the region to minimise erosion and ensure optimum flood protection for our communities. With many urban communities located on flood plains, it is important to have an appropriate standard of flood risk mitigation for the safety of the community. The protection of the flood plains is also important for protecting productive land, which is important to the economic goals of the immediately affected areas as well as the wider region.

Flood protection is funded through general and Scheme rates based on the amount of protection benefit each ratepayer receives. Horizons currently manages 34 River and Drainage Schemes across our region, maintains over 500 km of stopbanks, 509 floodgates, over 800 km of river channel, and more than 1,100 km of drains.

Scheme boundaries map

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Stopbank grazing guidelines

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Moutoa flood gates

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River and Drainage Infrastructure Asset Management Plan

Download

 

Planned Works

A monthly report of planned engineering works for River Flood and Drainage Scheme maintenance, repair, and capital projects is available here.
 

How to interact with the map


This report is refreshed monthly three working days before the end of the month, to show works planned for the month ahead. For any enquiries about planned engineering works please contact us.

The location and timing of planned works for the month ahead is indicative as these are dependent on variables that can change such as weather, contractor availability, and other reactive work priorities that arise. Reactive works occurring during a month, such as that in response to urgent damage, will be added to the report at the end of the month.

 

Scheme Liaison Committee Meetings

Scheme Liaison Committee Groups are informal groups established by Horizons to:

  • Facilitate effective communication between scheme ratepayers and Horizons Regional Council and its officers;
  • Be the eyes and ears for scheme ratepayers in regard to levels of service and scheme performance;
  • Provide feedback to Scheme Managers on maintenance programmes, scheme review, and audit findings and rating/funding proposals.
We welcome all to attend the meetings. The 2026 Scheme Liaison Committee Meetings schedule is outlined below.
 
  Scheme Date Time Venue
MANAWATU DISTRICT Pohangina-Oroua River Control 19-Feb-26 9.00am Pohangina Hall
Lower Kiwitea Scheme
Ashhurst
TARARUA DISTRICT Mangatainoka Scheme 19-Feb-26 1.00pm The Village Hall
Woodville

 
Upper Man/Lwer Mangahao Scheme
Tararua District Wide
Tawataia
South Eastern Ruahine Scheme
LOWER MANAWATU AREA Lower Manawatū Scheme 20-Feb-26 9.00am Kairanga Hall
Manawatū Drainage Scheme
Kahuterawa Scheme
Te Kawau Scheme
HOROWHENUA DISTRICT Moutoa Scheme 20-Feb-26 1.00pm Foxton
Te Awahou Nieuwe Stroom
Teal Room
Whirokino
Himatangi
Hōkio
Ōhau-Manakau Scheme
Foxton East
Koputaroa Scheme
Makerua Scheme
RUAPEHU DISTRICT Ruapehu District Wide 23-Feb-26 4.00pm Ohakune
The Peaks Motor Inn
Conference Centre
Ohakune
Pakahi
Upper Whanganui River
RANGITIKEI DISTRICT Turakina River Scheme 26-Feb-26 9.00am Horizons Regional Council  Marton Office
Tutaenui Scheme
Rangitīkei Scheme
Porewa Scheme
Forest Road
Huanui
Makirikiri Scheme
LOWER WHANGANUI AREA Lower Whanganui River Scheme 26-Feb-26 2.00pm Whanganui
War Memorial Centre
Pioneer Room
Matarawa Flood Control
Whangaehu-Mangawhero Scheme

 

Scheme Meeting Presentations

Click a download button from the list below to view a downloadable PDF of the information presented at the most recent scheme meeting.
 

2026 February Weather Event Scheme Meeting Presentation
2026 Horowhenua Scheme Meeting Presentation
2026 Lower Manawatū Scheme Meeting Presentation
2026 Lower Whanganui Scheme Meeting Presentation
2026 Manawatū District Scheme Meeting Presentation
2026 Pohangina-Oroua (Follow-Up) Scheme Meeting Presentation
2026 Rangitīkei River Scheme Meeting Presentation
2026 Ruapehu Scheme Meeting Presentation
2026 Tararua Scheme Meeting Presentation
2025 Manawatū Drainage Scheme Meeting Presentation
2025 Rangitīkei River Scheme Meeting Presentation
2025 Ruapehu Scheme Meeting Presentation
2025 Whanganui Scheme Meeting Presentation

 

Drainage Scheme Maps

Click a download button from the list below to view a downloadable PDF of the relevant drainage scheme.
 

Himitangi Drainage Scheme Map
Hokio Drainage Scheme Map
Koputaroa Drainage Scheme Map
Makerua Drainage Scheme Map
Manawatū Drainage Scheme Map
Moutoa-Whirokino Drainage Scheme Map
Ohau-Manakau River and Drainage Scheme Map
Te Kawau Drainage Scheme Map