Manawatu–Whanganui
The largest project portfolio in SAE's history is centred on Marton and the Rangitikei District - including three major subdivisions and multiple stormwater neutrality projects.
Regional expertise
SAE's Manawatu–Whanganui project base is the largest by project count in the portfolio. Most of this work is centred on Marton, where the firm inherited three significant subdivision projects from Andre's time at LDE (Land Development and Engineering, Marton, 2019–2020) and has continued to win work in the region since 2021.
The regulatory environment in Rangitikei District involves Rangitikei DC (territorial authority) and Horizons Regional Council (regional) - both of which require separate approvals for subdivision and discharge. SAE understands both. The Horizons RC requirement for a 200-year flood design standard (versus the NZ-standard 100-year) has been applied on the Hereford Heights 90-lot subdivision and the Henderson Line project. Horizons RC resource consent for watercourse change was obtained on the George St Bulls project.
Pallic soils (Flaxtonford series) dominate the Rangitikei District - poorly drained, with low permeability. This shapes stormwater design: soakage is generally not viable, and detention (tanks or swales) is the primary mechanism. Datum reconciliation between NZVD2016 and WVD1953 has been an issue on multiple Rangitikei projects - the difference of 0.543 m at Marton is significant for finish floor level setting in flood-prone areas.
Coverage
NZS 4404:2010 supplemented by the RDC Land Development Addendum (2017); subdivision engineering plan approval; S224c certification. SAE has taken three Rangitikei subdivisions through multi-stage S224c certification and holds familiarity with RDC consent processing timelines and technical requirements.
200-year flood design standard; discharge consents for subdivision stormwater; watercourse change consents; wetland classification under NPS-FW 2020. Horizons RC resource consent was obtained for the George St Bulls watercourse change. The 200-year design standard has been applied across Henderson Line and Hereford Heights.
Project experience includes Bignell St, Whanganui and a Feilding concept. Enquire for current availability in these territorial areas.
Selected work
| Project | Type | Key detail |
|---|---|---|
| Henderson Line, Marton | Greenfield subdivision (70 lots, 2020–2025) | Box culvert vs dual 1050 mm circular - $600K saving; multi-stage S224c; construction supervision |
| Hereford Heights, Marton | Greenfield subdivision (90 lots, 2019–2022) | 200-year Horizons RC flood standard; datum reconciliation 0.543 m; multi-stage S224c |
| Kensington Road, Marton | Subdivision (41 lots, 2022–2026) | WSP wetland rebutted with 1942–1982 aerials; 500 m³ swale; NPS-FW compliance; multi-agency consent |
| Milne St Extension, Marton | Feasibility / rezoning (up to 400 lots, 2023) | 5 sub-catchments; pre-development 457 L/s → post-development 711 L/s; GHD WW review; NPS-FW wetland risk |
| George St, Bulls | Subdivision / stormwater (2024) | 290 m detention swale 1,020 m³; 300 mm→525 mm pipe; Horizons RC watercourse consent |
| Flower St, Bulls | 3-lot subdivision (2024) | Pallic soils; soakage vs kerb analysis; 11.5 m³ detention; NIWA RCP 6.0 |
| Rayner Lane, Marton | 9-lot brownfield (2024–2026) | Sewer easements; one-way access; S224c January 2026 |
| Pukepapa Rd, Marton | 6-lot subdivision | Full three-waters design; EPA approved; NZS 4404 |
SAE has completed more projects in the Rangitikei District than any other region. Enquire today.
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