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CapexCue · Public evidence · Printed 11 Nov 2026
Explore projects / Project dossier

Awaroa Sill, Ruamāhanga Awa

New Zealand · Water and environment

In-depth research Release 1

Project scope

Plan: The proposal is to reposition the existing sill farther back from the river edge and build 10 rock groynes, each of 200 tonnes, in front of it. The stated purpose of the groynes is to deflect flow away from the sill and reduce further lateral movement of the channel.

Reported status and procurement

Reported development

The page reports that enabling works have begun and that the project is due to be completed in 2026. The completion statement is a forecast, not confirmation of completion.

Procurement availability
Unknown / not established

Reported regulatory context

The project is presented among the programme’s sites; the introductory programme text says all projects have been granted resource consent. No consent details or dates are given for this site.

A source report alone does not establish current progress or an open buying window.

Project summary

Greater Wellington identifies Awaroa Sill on the Ruamāhanga Awa as an existing spillway structure affected by river erosion along the bank. The page describes the sill’s role in controlling flow into the spillway during high flow and reducing downstream flood risk.

The stated plan is to move the sill farther from the river edge and construct 10 rock groynes, each weighing 200 tonnes, to divert flow and limit further lateral channel movement. The page reports that enabling works have begun and forecasts completion in 2026; it does not confirm completion.

In programme-level context, Greater Wellington and Kānoa agreed to co-fund 16 flood-resilience projects following Budget 2024. The introductory text also says all programme projects have resource consent. Neither statement provides an Awaroa-specific funding allocation or consent details.

Evidence limits and unknowns

Exact site boundaries, coordinates, land ownership and access arrangements are not provided.

The project-specific budget or funding allocation, contract award, procurement package and purchasing timetable are not stated. The contractor information is programme-level and does not confirm an Awaroa Sill contract.

The page does not say when enabling works began or provide a later project-specific progress update confirming whether the proposed works have proceeded, changed or been completed. Completion in 2026 is presented as due, not achieved.

Detailed engineering design, quantities beyond the stated groyne number and weight, and ecological effects or mitigation are not supplied.

The supplied text gives no date for an Awaroa-specific update. The visible 29 May 2026 update timestamp belongs to the shared communities section, not the Awaroa project entry.

This evidence covers the selected project section, front matter and shared sections, not the complete source page or independent corroboration. Other project sections and linked materials were not supplied for review.

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Project metadata

Country
New Zealand
Based on reviewed release evidence
Region
Oceania
Category
Water and environment
Derived from released evidence
Physical assets
Not classified

Based on this release's supporting evidence. Unresolved fields remain unclassified; these labels do not establish current progress or a buying window.

Released facts and supporting evidence

Each fact retains its source, uncertainty and time context. If a publisher page moves or is unavailable, use the recorded quotation and observation date below.

Project name

Source reported

Awaroa Sill, Ruamāhanga Awa

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · Awaroa Sill, Ruamāhanga Awa
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[2]/div/div[6]/button/h3
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
260e7e32-b583-41ea-b74d-8d8b83813ee3
Evidence reference
dc728f5f-f350-4350-a561-8879c3ff7d9d
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Scope

Planned

The proposal is to reposition the existing sill farther back from the river edge and build 10 rock groynes, each of 200 tonnes, in front of it. The stated purpose of the groynes is to deflect flow away from the sill and reduce further lateral movement of the channel.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · The proposal is to reposition the existing sill …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[2]/div/div[6]/div/p[2]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
1f988f65-b31c-41cb-a9a6-47559ccf2b3a
Evidence reference
678dfc8d-4eb1-4b9f-95b6-8dd9d33d7a4e
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Country

Source reported

New Zealand, as stated in the surrounding flood-resilience programme context.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · New Zealand, as stated in the surrounding flood-resilience …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[1]/div/p[1]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
05d97108-e275-4f33-8da7-79781945ffad
Evidence reference
fb4c10ec-2b46-400b-8ec2-e82131700d14
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Current activity

Source reported

The page says lateral river erosion has undermined the bank and reached the edge of the existing sill. The sill controls the volume and speed of water entering the spillway, particularly during high flow, reducing downstream flood risk.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · The page says lateral river erosion has undermined …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[2]/div/div[6]/div/p[1]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
81c5c9b1-8f9f-4e44-ae00-7bf18cddefdf
Evidence reference
b130a5e7-23f6-43a9-9cc9-abd8eff9c38d
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Delivery

Source reported

The page reports that enabling works have begun and that the project is due to be completed in 2026. The completion statement is a forecast, not confirmation of completion.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · The page reports that enabling works have begun …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[2]/div/div[6]/div/p[3]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
948ed46a-0acf-4dfc-aa3f-a5eedf9e565e
Evidence reference
5ad3de2e-9bae-446c-9a6b-0fa9fa4dbc74
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Location

Source reported

At the existing Awaroa spillway sill on the Ruamāhanga Awa. The broader programme is described as spanning Wairarapa and Ōtaki, but this section gives no coordinates or more precise site boundaries.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · At the existing Awaroa spillway sill on the …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[2]/div/div[6]/button/h3
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
7a384e20-0d84-4922-b0ae-f5ac5656a1a8
Evidence reference
dc728f5f-f350-4350-a561-8879c3ff7d9d
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Contractor

Source reported

Shared programme context only: Mills Albert is described as appointed lead contractor for Greater Wellington’s flood-resilience projects. The supplied text does not expressly confirm the contractor appointment or contract scope for Awaroa Sill.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · Shared programme context only: Mills Albert is described …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[3]/div/p[6]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
2c5b8704-dc6b-4b1b-b4ee-4e1eeb32d21c
Evidence reference
e7f6cb19-6187-4ac1-8856-efa9cc616811
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Investment estimate

Source reported

Programme-level context: Greater Wellington and MBIE’s Regional Economic Development and Investment Unit, Kānoa, agreed to co-fund 16 flood-resilience projects. The page does not give an Awaroa Sill-specific allocation or cost.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · Programme-level context: Greater Wellington and MBIE’s Regional Economic …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[1]/div/p[3]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
e429ab13-219c-404d-a48c-8bb16345af69
Evidence reference
b24fa223-7680-4897-b285-2e5b7cb674b4
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Regulatory evidence

Source reported

The project is presented among the programme’s sites; the introductory programme text says all projects have been granted resource consent. No consent details or dates are given for this site.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · The project is presented among the programme’s sites; …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[1]/div/p[4]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
36f2cc06-4136-4b71-be52-4d5091a320a4
Evidence reference
1874db75-0c05-4e1f-8454-d5e8c2aafa5a
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/

Next milestone

Planned

Completion is due in 2026, according to the project section; no intermediate milestone is specified.

Attributed to Greater Wellington Regional Council project narrative.

Source: Greater Wellington Regional Council own-text flood protection records · publication date not recorded · observed 2026-10-02

Sources and evidence · Greater Wellington Regional Council own-text flood protection records
Source published: Not recordedObserved: 2026-10-02

Greater Wellington Regional Council own-text flood protection records
Attributed to Greater Wellington Regional Council project narrative

Technical record · Completion is due in 2026, according to the …
Evidence location
/html/body/main/div[2]/div/div[1]/div/div[2]/div/div[6]/div/p[3]
Claim confidence
0.90 on a 0–1 evidence-support scaleNot a probability of project success or procurement availability.
Claim reference
5012f347-952b-4d4f-aed2-f6f63096ae3e
Evidence reference
5ad3de2e-9bae-446c-9a6b-0fa9fa4dbc74
Source revision
df3369cd-e75f-4ca2-9568-33269d722921
Content fingerprint
c71ee05576091953862c696126b62fc0aa9a0b98afa09e4c4bc9809c3eaab9bd
Source address
https://www.gw.govt.nz/your-region/emergency-and-hazard-management/flood-protection/our-work/flood-resilience-projects/
Source report history

Prior and superseded states remain labelled. Dates below identify source publication when known, otherwise source observation. They are not assumed event dates; each fact retains its own time qualifications.

  1. No material timeline events have been released.

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