Grange Planning Brain

title: Bonshaw Creek Sewer Infrastructure Constraint council: ballarat state: vic category: infrastructure classification: MAJOR status: active last_compiled: 2026-04-16 source_docs:

  • ballarat-west-growth-area-housing-and-growth-enabling-infrastructure-bnif.txt
  • ballarat.-now-and-into-the-future-enabling-growth-2025-information-pack_0.txt
  • ballarat-west-precinct-structure-plan-psp-february-2026.txt
  • ballarat-west-development-contribution-plan-dcp-february-2026.txt
  • ballarat-west-dcp-version-5.1.txt
  • ballarat-west-growth-area-plan-march-2009.txt
  • growth-areas-framework-plan-western-and-north-western-growth-areas_august-2024.txt
  • ballarat-igaf.txt
  • housing-strategy-2041.txt
  • city-of-ballarat-advocacy-priority-projects-pipeline_tier-3_feb2026.txt
  • city-of-ballarat-appp_feb2026.txt
  • 11-september-2024-council-meeting-agenda-with-attachments-compressed_part3.txt
  • 23-july-2025-council-meeting-agenda-with-attachments.txt

Bonshaw Creek Sewer Infrastructure Constraint

The Bonshaw sewer and drainage catchment — the south-eastern pocket of the Ballarat West PSP Sub-Precinct 1 (Bonshaw Creek) — is the single largest serviceability blocker on Ballarat’s greenfield housing pipeline. Central Highlands Water has identified that approximately 200 hectares of zoned Urban Growth Zone land, capable of accommodating up to 3,500 dwellings at the PSP’s minimum density, cannot be developed without a new sewer pump station (SPS) estimated at 4.6 million, to be co-located with a drainage basin on Schreenans Road. The constraint is not a zoning, heritage or market problem — the land is already Urban Growth Zone Schedule 2, covered by an adopted PSP, and sits in Ballarat's most actively developing corridor (Delacombe/Winter Valley/Bonshaw population grew 50%+ in five years to 10,661 by 2021, and is forecast to reach 31,134 by 2046). The blocker is hydraulic: the Bonshaw catchment falls to the wrong side of the north–south ridge that defines Ballarat's gravity sewer shed, so conventional gravity extension to the Ballarat South Sewage Treatment Plant cannot work, and the economics of a developer-funded pump station collapse under the weight of 50+ fragmented titles unable to coordinate a common contribution. The 4.6m SPS is therefore packaged by City of Ballarat and CHW into a seven-project, $13.27 million “Ballarat West Growth Area Housing and Growth-Enabling Infrastructure” (BNIF) advocacy bid to state and federal government, positioned as the trigger that unlocks 8,800 of the 46,900 dwellings in Ballarat’s 2051 Plan for Victoria housing target. This page traces the hydraulic geography that produced the constraint, the fragmentation problem that prevents private solution, the BNIF funding architecture, the dependencies on Schreenans Road and Cherry Flat Road, and the implications for Ballarat’s land-supply timetable.

Background

The 2009 diagnosis — a servicing constraint embedded from the start

The servicing problem in the western and south-western portions of the Ballarat West Growth Area (BWGA) was identified before the area was even rezoned. The Ballarat West Growth Area Plan (March 2009), prepared by Connell Wagner / CPG Australia for the City of Ballarat, noted that while “Ballarat West area has limited known physical constraints to development” in the conventional sense (slope, flooding, biodiversity), there was one structural servicing issue that it flagged explicitly:

“A fall towards the west provides a constraint through increased servicing costs beyond the plan area for hydraulic infrastructure provision, particularly sewer.” (Source: ballarat-west-growth-area-plan-march-2009.txt)

The 2009 plan diagnosed the problem in hydraulic terms. Ballarat’s sewerage network is gravity fed, with mains following natural drainage lines. The BWGA sits astride a north–south topographic rise. Land to the east of this rise falls toward the Winter Creek / Bonshaw Creek / Kensington Creek corridor, which drains south to the Ballarat South Sewage Treatment Plant and can be serviced by gravity extension. Land to the west of the rise, however, falls into a separate catchment that cannot reach the Ballarat South STP by gravity. The 2009 plan stated:

“Because the sewerage network is gravity fed some issues will exist in servicing the western portion of the plan area west of the rise generally running north south… This issue is created because the western portion of the plan falls to a separate catchment and is outside the main likely to follow Winter Creek. This will necessitate the construction of pumping stations and rising mains to cross the higher ground.” (Source: ballarat-west-growth-area-plan-march-2009.txt)

The plan’s Map 3 (Hydraulic Services) marked the ridgeline and annotated “Access to rising main required for sewer” on the western portion of the growth area (Source: ballarat-west-growth-area-plan-march-2009.txt). This is the physical fact that produces the Bonshaw constraint: the Bonshaw portion of Sub-Precinct 1, particularly the land south of Schreenans Road and east of Cherry Flat Road, falls into a catchment that cannot be gravity-drained to Ballarat South STP, and therefore requires a pump station plus rising main to lift effluent across the ridge.

Central Highlands Water (CHW) was identified as the responsible servicing agency. At the time of the 2009 plan, CHW “had only undertaken preliminary planning for the growth area” and could not commit to cost, timing or location, but had indicated “an understanding of the implications and capacity to serve the plan area” (Source: ballarat-west-growth-area-plan-march-2009.txt). The 2009 plan explicitly said its function was to provide “the basis for more detailed planning which will deliver more certainty on cost, timing and location of the infrastructure provision” — a commitment that would only be fulfilled by the CHW / BNIF work 16 years later.

The PSP era — fragmentation recognised, sewer deferred

The original Ballarat West PSP (adopted 2012, prepared by SMEC Urban) zoned the three Sub-Precincts to Urban Growth Zone Schedule 2 via Amendment C196. The PSP covered approximately 1,290 hectares across three Sub-Precincts:

  • Sub-Precinct 1: Bonshaw Creek — 651 hectares (original PSP) / 673 hectares (amended February 2026 PSP) (Source: ballarat-west-precinct-structure-plan-psp-february-2026.txt)
  • Sub-Precinct 2: Greenhalghs Road — 288 hectares (original) / 309 hectares (amended)
  • Sub-Precinct 4: Ballarat-Carngham Road — 282 hectares (original) / 303 hectares (amended)

Sub-Precinct 1 Bonshaw Creek is the largest of the three. The Bonshaw, Kensington and Winter Creek corridors bisect it, providing both the drainage spine and the visual/landscape structure. The PSP’s housing targets — a minimum net density of 16 dwellings per Net Developable Hectare, refined in the February 2026 amendment to an achieved density of 16.94 dw/NDHa across the full PSP (Source: ballarat-west-precinct-structure-plan-psp-february-2026.txt) — translate Sub-Precinct 1’s 673 ha into roughly 9,000 anticipated lots, of which the Bonshaw sewer catchment contributes approximately 3,500 dwellings on 200 hectares per the BNIF business case (Source: ballarat-west-growth-area-housing-and-growth-enabling-infrastructure-bnif.txt).

The PSP’s land-owners

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Analysis

Hydraulic geography — why gravity extension cannot work

The Bonshaw sewer catchment is defined by topography, not by property boundaries. The PSP describes the terrain in Sub-Precinct 1 as sloping from the Glenelg Highway area “towards the Winter, Bonshaw and Kensington Creeks, to a minor escarpment running north-west/south-east across the middle of the Sub-Precinct” (Source: ballarat-west-precinct-structure-plan-psp-february-2026.txt). Bonshaw Creek itself “bisects Sub-Precinct 1. It runs north from Winter Creek and is incised in many places as it passes through the escarpment. The incised edges of the creek” drive the local drainage and servicing pattern (Source: ballarat-west-precinct-structure-plan-psp-february-2026.txt).

The consequence is that different parts of Sub-Precinct 1 fall into different sewer catchments:

  • The eastern portion of Sub-Precinct 1 (east of the ridge, generally north of Webb Road and east of Cherry Flat Road) drains toward Winter / Kensington Creek and can reach the Ballarat South STP by extension of existing gravity mains.
  • The south-western portion (south of Schreenans Road, west of Cherry Flat Road — the area labelled “Bonshaw” in CHW’s commentary) falls into a separate catchment. Effluent generated here cannot flow by gravity to the STP because it would have to travel uphill across the north–south ridge.

The only feasible servicing solution is a sewer pump station that collects gravity flows from the western-falling catchment and lifts them via a rising main (a pressurised sewer) over the ridge, discharging into gravity sewers on the eastern side that then drain to the Ballarat South STP. The 2009 plan spelled this out: “This will necessitate the construction of pumping stations and rising mains to cross the higher ground” (Source: ballarat-west-growth-area-plan-march-2009.txt).

The Bonshaw SPS is the piece of infrastructure that delivers this. It is to be located at Schreenans Road, co-located with a drainage retarding basin on the same parcel of land (this co-location allows a single land acquisition to serve two purposes — sewer pump station siting and stormwater detention — which is why the BNIF package includes both the SPS works cost and the basin land cost as linked items).

The $4.6 million trigger — what the BNIF pump station actually does

The BNIF advocacy pack (City of Ballarat, 2025) gives the clearest exposition of what the infrastructure achieves. The quote from CHW’s Managing Director is the definitional statement:

“Sewerage infrastructure funding is a significant challenge for developers in the Bonshaw sewer and drainage catchment. The land is highly fragmented into over 50 separate titles. Government funding of an estimated $4.6 million can unlock this growth area.” — Jeff Haydon, Managing Director, Central Highlands Water (Source: ballarat-west-growth-area-housing-and-growth-enabling-infrastructure-bnif.txt)

The BNIF document quantifies the yield: “Bonshaw sewer pump station will support development of up to 3,500 new homes on 200 hectares in Bonshaw which cannot be built without this infrastructure” (Source: ballarat-west-growth-area-housing-and-growth-enabling-infrastructure-bnif.txt). The phrase “cannot be built without this infrastructure” is not rhetorical — it reflects the statutory requirement under the Urban Growth Zone Schedule 2 and the PSP (section 5.10) that every developed lot be provided with reticulated sewerage to the satisfaction of the relevant water authority (CHW). Until CHW can service the catchment, CHW will not sign off on subdivision applications for Bonshaw lots, and those subdivision applications cannot be approved by the Responsible Authority (City of Ballarat) without CHW’s servicing clearance.

The $4.6 million cost is for the works — the pump station itself. The BNIF package handles the land acquisition for the co-located drainage basin separately, through a City of Ballarat line item:

  • Sewer pump station co-located with drainage basin at Schreenans Road Bonshaw — Central Highlands Water — $4.6 million (works)
  • Land acquisition for drainage basins at Schreenans Road, Bonshaw and Bells Road, Smythes Creek — City of Ballarat — $2.04 million (land, shared across two basin sites)

The division of responsibility reflects the usual Victorian water industry / council split: CHW owns and delivers sewer infrastructure; Council owns and delivers drainage infrastructure. Co-location requires

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Current Status

The Bonshaw sewer constraint is active and unresolved as of April 2026. Key status points:

  • Funding status: $4.6m SPS is unfunded. BNIF advocacy package submitted 2025; awaiting state/federal government funding decisions.
  • Planning status: Zoning in place (UGZ Schedule 2); PSP adopted and amended February 2026; DCP adopted and amended February 2026. No further statutory planning required for the SPS specifically.
  • Engineering status: Preliminary sewer network planning reflected in PSP Plan 21. Detailed design not commenced. Catchment boundary confirmed as approximately 200 ha / 3,500 dwellings per CHW analysis.
  • Advocacy status: Listed in “Ballarat Now and Into the Future: Enabling Growth” advocacy package; City of Ballarat Advocacy Priority Projects Pipeline (Tier mixed across the bundle).
  • Development pipeline status: Subdivision applications for lands wholly within the Bonshaw sewer catchment cannot be approved. Subdivision applications for lands partially in the catchment (straddling the ridge) may proceed for the eastern-falling portion only.
  • Planning policy status: Growth Areas Framework Plan commits Council to continue engaging with CHW to resolve servicing constraints; Housing Strategy 2041 identifies CHW as a key consultation agency for infrastructure and utility servicing.

Next steps expected:

  1. State/federal funding decisions on BNIF package (likely through 2026 budget processes).
  2. If BNIF funded: CHW detailed design commences; land agreements between CoB and CHW for co-located basin site; procurement of construction contractor.
  3. If BNIF not funded: Council to consider alternative advocacy pathways; CHW to consider inclusion in post-2028 pricing submission; DCP to continue operating for road and drainage items in the eastern portion of Sub-Precinct 1.
  4. Independent land supply analysis (per Growth Areas Framework Plan commitment) to test whether Ballarat’s 15-year supply can tolerate delayed Bonshaw development.

Dependencies

  • Blocks:

    • Sub-Precinct 1 (Bonshaw Creek) subdivision in the western-falling portion of the catchment (approx. 200 ha / 3,500 dwellings).
    • Delivery of the DI_RD_31c Schreenans Road Creek Crossing ($17.24m DCP item), which is practically delivered only once Schreenans Lane extensions east and west are funded, which in turn requires DCP contributions from Bonshaw subdivisions.
    • Collection of DCP levies (DIL and CIL) from Bonshaw landowners; at 200 ha NDA of the 934.82 ha residential NDA, this is approximately 21% of the MCA’s DCP revenue base.
    • Ballarat’s ability to claim full greenfield land supply under Plan for Victoria and its own Housing Strategy without risking a below-15-year supply assessment.

  • Blocked by:

    • Fragmentation of landownership in the Bonshaw catchment (50+ separate titles; no single developer with enough scale to forward-fund the SPS).
    • CHW’s capital programme (currently committed to the 2023–2028 pricing period for other assets).
    • Absence of government grant funding for the SPS.
    • Jurisdictional gap between DCP (funds roads, drainage) and water industry regime (funds sewer) — neither fills the $4.6m hole alone.

  • Informed by:

  • Implements:

    • Victoria’s Housing Statement (2023)
    • Plan for Victoria — Ballarat’s 46,900-dwelling target to 2051.
    • City of Ballarat’s commitment in the Growth Areas Framework Plan to engage CHW on Bonshaw servicing.
    • PSP section 5.10 (Utilities and Staging) requirement for reticulated sewerage to all developed lots.

  • Conflicts with:

    • The principle of developer-funded trunk infrastructure that underpins the DCP and the out-of-sequence clause in the PSP (5.10.2) — Bonshaw is a structural exception requiring public funding.
    • The CHW pricing submission cycle, which ordinarily assumes sewer infrastructure is funded through the regulated capital programme or developer contributions, not grants.

Central Highlands Water (CHW): CHW is the water and sewerage authority for the Central Highlands region, including all of Ballarat. Its capital programme, pricing submission cycle and operational strategy are set under the Water Act 1989 / Water Industry Act 1994 and are regulated by the Essential Services Commission, not by City of Ballarat. CHW’s infrastructure decisions flow across the Council boundary — a CHW decision to fund or defer the Bonshaw SPS directly determines whether 3,500 lots of UGZ-zoned land in Ballarat can be developed. This is a textbook case of cross-jurisdictional infrastructure dependency, where a non-council authority holds the binding constraint on a council’s greenfield pipeline.

Golden Plains Shire (Cambrian Hill): Immediately south of Sub-Precinct 1 Bonshaw Creek, across the Ballarat LGA / Golden Plains Shire boundary, is the proposed Cambrian Hill development — a “3,000 lot residential proposal within Golden Plains Shire, adjacent to the Ballarat West PSP” (Source: growth-areas-framework-plan-western-and-north-western-growth-areas_august-2024.txt). Cambrian Hill sits outside the Bonshaw sewer catchment as currently defined, but its own sewerage servicing will involve CHW (or a negotiated arrangement, as CHW’s boundary extends beyond Ballarat LGA). The Growth Areas Framework Plan notes: “Although the Cambrian Hill development is outside of the Ballarat municipality, if the development proceeds, the future residents of the area may be reliant on the services and amenities of Ballarat for their day-to-day needs. Development of Cambrian Hill may also impact transport and community infrastructure within the existing and future growth areas.” The 3,500 Bonshaw dwellings plus 3,000 Cambrian Hill lots would create a combined southern-BWGA community of approximately 16,000 residents — with the Bonshaw SPS a potential servicing node for both if the CHW boundary and engineering permit.

Department of Transport and Planning (DTP): DTP is a key consultation partner on the Housing Strategy and Growth Areas Framework Plan (Source: housing-strategy-2041.txt). DTP’s own infrastructure program (roads, public transport) intersects with Bonshaw through the Ballarat Link Road Stages 2 and 3 (Dyson Drive duplication $88.3m), Western Link Road long-term planning, and public transport routing assumptions along Cherry Flat Road. The Bonshaw catchment’s development activates demand for the Cherry Flat Road bus route.

Victorian Planning Authority (VPA): VPA is the planning authority for the Northern Growth Area PSP (appointed 2022) but not for the Ballarat West PSP, which is a Council-led plan. The VPA’s work on the Northern PSP is a parallel workstream — if the Northern PSP delivers earlier than Bonshaw, Ballarat may partially offset the greenfield supply gap.

Australian Government (Growing Regions Program; Housing Australia): Federal funding is the primary target of the BNIF advocacy. Precedent: Ballarat secured $8.53m for Eastwood Community Hub through Growing Regions Program.

Victorian Government (Treasury; Department of Treasury and Finance; Department of Transport and Planning): State funding through Regional Growth Fund, Regional Jobs and Infrastructure Fund, or ad-hoc housing-infrastructure grants is the secondary funding channel.

Gaps in This Analysis

The following gaps limit the depth of this analysis and are catalogued in _gaps.md:

  1. CHW servicing strategy for BWGA (primary source). The PSP’s Plan 21 is described as “based on preliminary information supplied by Central Highlands Water.” A full CHW servicing strategy document, showing the precise catchment boundary, SPS capacity (L/s), rising main diameter and alignment, discharge point, and staging triggers, has not been located in the corpus. This is likely a CHW internal document, potentially referenced in the CHW Urban Water Strategy or annual Price Submission to ESC.

  2. BNIF business case detail. The BNIF 2-page factsheet in “Ballarat Now and Into the Future: Enabling Growth” is a summary. A detailed business case (CBA, sensitivity analysis, funding decomposition, risk register) would have been prepared by City of Ballarat and/or consultants for the advocacy bid. This is not in the corpus.

  3. CHW 2023–2028 Price Submission and Capital Works Programme. Details of what CHW’s current capital programme does fund, and why Bonshaw is not in it, would enable a better-informed analysis of the counterfactual timeline if BNIF fails.

  4. Schreenans Road SPS detailed site selection. The BNIF identifies “Schreenans Road” as the SPS location but does not pinpoint the property. A specific parcel map (likely in a City drainage scheme or CHW options study) would allow calculation of land acquisition cost and lot yield impact on the host parcel.

  5. Fragmentation title analysis. CHW’s “over 50 separate titles” claim is quantitative but not spatial. A title plan showing the exact 50+ titles, their average size, and their ownership distribution (how many owners for the 50+ titles) would clarify whether consolidation is possible and at what cost.

  6. Federal/state funding application status. The BNIF is an advocacy package; the status of specific funding applications (which programs, which round, which outcome) is not documented. This is a rolling situation that will need periodic update.

  7. Historical correspondence between CHW and City of Ballarat on Bonshaw servicing. Council minutes 2015–2024 may contain references to CHW presentations, servicing agreement updates, or funding discussions that would enrich the chronology. A systematic minutes scan has not been completed for this page.

  8. Ballarat West DCP sewer-related references. The DCP does not include sewer infrastructure, but it may contain cross-references to CHW servicing obligations (e.g., in the strategic justification sections of individual drainage items, or in the DCP review triggers section). A full DCP scan would confirm whether any DCP item is explicitly conditional on CHW delivery.

  9. Urban Design Framework for 155 Ballarat-Carngham Road Winter Valley. Located in the corpus (urban-design-framework-for-155-ballarat-carngham-road-winter-valley.txt) but not cross-referenced here. This UDF may include servicing commentary relevant to Sub-Precinct 2, which shares some servicing architecture with Sub-Precinct 1.

  10. Ballarat South STP capacity. The Ballarat South Sewage Treatment Plant is the ultimate receiving facility for all BWGA effluent. Its hydraulic and biological capacity, and whether augmentation is required to receive the additional ~40,000 future BWGA equivalent population load, is not documented in the corpus. This is a secondary but material consideration — a pump station that discharges into a STP already at capacity does not resolve the constraint.

  11. Ballarat Link Road funding and timing. While Dyson Drive duplication ($88.3m) is a BNIF project, Ballarat Link Road stages 2 and 3 funding and timing are not fully documented. The Link Road is the eventual arterial that carries cross-town traffic through Bonshaw; its absence or delay affects road-network viability of the serviced catchment.

  12. Cambrian Hill development status. Golden Plains Shire documentation on Cambrian Hill would clarify whether it is pursuing CHW servicing, private on-site treatment, or another arrangement — and whether its servicing could share infrastructure with Bonshaw.

Extended Analysis

Drainage architecture and the co-location decision

The decision to co-locate the Bonshaw SPS with a drainage retarding basin at Schreenans Road is not incidental. It is a consequence of the precinct’s integrated water management (IWM) strategy and the PSP’s drainage planning, and it has material implications for land take, cost allocation, and scheme risk.

The PSP’s drainage strategy is framed by Plan 15 Integrated Water Management. The PSP states: “Stormwater generated from the Ballarat West PSP area is critical in ensuring there are no detrimental impacts to the existing watercourses within the catchment as a result of future development. There are three existing named creeks within the Precinct: Kensington Creek, Winter Creek and Bonshaw Creek. This network forms a continuous creek corridor through Sub-Precincts 1 and 2” (Source: ballarat-west-precinct-structure-plan-psp-february-2026.txt). The drainage scheme is designed around these creek corridors, with retarding basins (temporary stormwater detention structures) located along the waterways to attenuate peak flows before discharge.

The PSP’s Table 1 Land Use Budget shows total Drainage Basin land take across the PSP at 48.51 ha (3.97% of total precinct), with Sub-Precinct 1 accounting for 31.80 ha (4.88% of Sub-Precinct 1 area). This is a substantial deduction from gross developable area — at the PSP’s 16.94 dw/NDHa density, the 48.51 ha of drainage basin land represents forgone lot yield of approximately 822 dwellings. This is not a loss in the sense that it reduces the headline yield figure (15,839 dwellings is calculated after drainage deductions), but it is a cost recovery question: whose land becomes the basin, and do they get credit or compensation?

The DCP treats drainage basins as DCP-funded items, with land and construction both eligible. The levy is applied per hectare of NDA across the MCA, meaning drainage infrastructure is a development cost recovered through contributions, not a landowner-borne loss. However, the land take itself still reduces lot yield on the host parcel, and the DCP’s compensation mechanism values the land at levy-neutral rates (July 2024 dollars).

The Bonshaw SPS / drainage basin co-location at Schreenans Road leverages this arrangement. A single land acquisition, funded in part by BNIF ($2.04m for both the Schreenans Road and Bells Road basin sites combined), provides:

  • Basin footprint — surface area for stormwater detention.
  • SPS footprint — compact structure typically 0.1–0.2 ha including access, emergency storage and electrical infrastructure.
  • Shared access and services — single road access, shared electricity connection, shared fencing and landscaping.

The shared footprint is efficient. A standalone basin land acquisition would typically be 3–5 ha. A standalone SPS might be 0.2–0.5 ha. Co-located, the combined footprint is approximately the basin footprint with the SPS as a minor overlay (approximately 5–10% of basin area). This efficiency matters both for capital cost (less land to acquire) and for residual land value (less land removed from development).

The co-location does create operational complexity. The SPS requires 24/7 access, power supply redundancy, odour management and emergency overflow provision. Co-locating with a basin means the SPS must be designed to function during basin operation (when the basin is actively detaining stormwater). Odour management may require biofilters or carbon filters to prevent emissions into what will be a public open-space basin surround. These design details will emerge during CHW’s detailed design phase.

The adjacency also creates drainage-sewer interaction risk. If an SPS fails (power outage, pump failure), overflow may discharge into the adjacent basin — which is a controlled-overflow scenario but requires design planning. Conversely, if the basin is in a major flood event (1%-AEP or 0.5%-AEP), the SPS must remain operational with sealed access. These are standard engineering challenges but add to the $4.6m cost estimate.

Water Supply — the parallel but less binding constraint

While the Bonshaw sewer is the primary binding constraint, water supply is a parallel but less constraining issue. The BNIF includes a **Greenhalghs Road trunk water pipeline at 1.2m**, delivered by CHW, coincident with the Greenhalghs Road civil upgrade (1.84m delivered by CoB). The BNIF rationale: “A trunk water pipeline on Greenhalghs Road can

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Appendix A: Key source document inventory

DocumentAuthorDateRelevance
Ballarat West Growth Area Housing and Growth-Enabling Infrastructure (BNIF)City of Ballarat2025Primary source on the $4.6m SPS; Jeff Haydon quote; 3,500/200ha figure
Ballarat Now and Into the Future: Enabling Growth 2025 Information PackCity of Ballarat and partners2025Full advocacy package context; BNIF as item 3 of 8 projects
Ballarat West Precinct Structure Plan (amended)SMEC Urban for City of BallaratFebruary 2026Statutory PSP; Plan 21 Sewerage Network; section 5.10 Utilities; land use budget
Ballarat West Development Contributions Plan (amended)City of BallaratFebruary 2026DCP items for Schreenans Road, Cherry Flat Road; DIL and CIL architecture
Ballarat West DCP Version 5.1City of Ballarat(prior)Earlier DCP showing baseline projects
Ballarat West Growth Area PlanCPG Australia / Connell WagnerMarch 2009First diagnosis of western-catchment sewer constraint
Growth Areas Framework Plan (Western and North Western)City of BallaratAugust 2024Commits Council to resolve Bonshaw servicing with CHW
Ballarat Infrastructure & Growth Alignment Framework (IGAF)City of Ballarat2024Sequencing logic and West of West contrast
Ballarat Housing Strategy 2041City of Ballarat2024CHW and DTP as key consultation agencies
Ballarat West Growing Grass Frog Conservation Management Plan(not in corpus detail)(various)EPBC Act requirements along creek corridors
City of Ballarat Advocacy Priority Projects Pipeline (Tier 3)City of BallaratFebruary 2026Multi-tier advocacy positioning
City of Ballarat Advocacy Priority Projects Pipeline (full)City of BallaratFebruary 2026Delacombe/Winter Valley/Bonshaw pop projections
Ballarat West Transport ReviewSMEC22 March 2023Schreenans Road design issues; bridge cost
11 September 2024 Council Meeting Agenda (part 3)City of Ballarat2024Transport Review adoption; recommendations
23 July 2025 Council Meeting AgendaCity of Ballarat2025Reference to Schreenans Road project in works programme

Appendix B: Quantified facts reference

For quick reference, the key quantified facts cited throughout this analysis:

The Constraint:

  • 200 hectares of constrained BWGA land in the Bonshaw sewer catchment
  • Up to 3,500 new homes affected
  • 50+ separate titles in the Bonshaw sewer and drainage catchment
  • $4.6 million estimated cost for the Bonshaw sewer pump station

The BNIF Package:

  • $13.27 million total package cost
  • 7 projects, 5 delivered by City of Ballarat, 2 by Central Highlands Water
  • 8,800 new homes fast-tracked across the whole package
  • Per-dwelling cost: approximately $1,508

Bonshaw-Specific BNIF Items:

  • Sewer pump station at Schreenans Road (CHW): $4.6m
  • Land for drainage basins at Schreenans Road and Bells Road (CoB): $2.04m
  • Land for Cherry Flat Road / Schreenans Road (CoB): $1.84m
  • Subtotal Bonshaw: $8.48m (64% of BNIF)

Ballarat West PSP:

  • 1,285–1,290 ha total PSP area
  • 1,102.55 ha Gross Developable Area
  • 973.03 ha Net Developable Area
  • 934.82 ha residential NDA; 38.21 ha commercial/industrial NDA
  • 15,839 dwellings projected (original 14,442)
  • 16.94 dw/NDHa lot density (original 15.19)
  • ~39,150 population at 2.5 persons/household
  • 230 original properties

Sub-Precincts:

  • Sub-Precinct 1 Bonshaw Creek: 651–673 ha
  • Sub-Precinct 2 Greenhalghs Road: 288–309 ha
  • Sub-Precinct 4 Ballarat-Carngham Road: 282–303 ha

DCP Levy Architecture:

  • DIL: per hectare NDA
  • CIL: per dwelling, $1,450/dwelling 2024-25 Ministerial rate
  • Community CIL items for MAC: 1,022.62 (Library) + 305.38 (Community Centre) + 317.39 (Early Years Hub) + 332.50 (Tait Street Hub) + 569.96 + 417.35 = ~$2,965 per dwelling from community facilities alone

Schreenans Road Road Items (DCP):

  • Schreenans Road widening Land: 1050m × 4m = 0.42 ha
  • Schreenans Road extension (re-routed) Land: 287.5m × 24m = 0.69 ha
  • Schreenans Lane upgrade (440m): $1,594,414
  • Schreenans Lane extension west (340m): $1,232,047
  • Schreenans Lane Creek Crossing bridge: $17,243,200
  • Schreenans Lane extension east: $1,148,702
  • Cherry Flat Rd / Schreenans Rd Roundabout (JNC_11, 3-arm 2-lane)

Cherry Flat Road Upgrades:

  • Cherry Flat Rd - Wiltshire to Webb: 1,035m (or 320m per some text)
  • Cherry Flat Rd - Webb to Schreenans: 790m
  • Cherry Flat Rd - Schreenans to Bells: 750m (duplicated link)

Central Highlands Water:

  • 80,070 water supply connections
  • 70,195 sewerage service connections
  • 187,215 residents served
  • Jeff Haydon, Managing Director

Housing Targets:

  • 46,900 net new dwellings to 2051 (Plan for Victoria)
  • 28,000 infill (60%) / 18,900 greenfield (40%)
  • 1,675 dwellings/year to 2051
  • 99,000 total dwellings target (from ~52,000 existing)
  • 800,000 homes Victoria 2024–2034 (Housing Statement)

Delacombe Statistical Area (Winter Valley + Bonshaw + Delacombe):

  • 10,661 residents 2021 (+50%+ in 5 years)
  • 31,134 residents projected 2046

Ballarat (municipality):

  • 118,137 residents 2023 (ABS estimated)
  • 164,365 projected 2046
  • 171,429 projected 2041 (per PSP Housing Strategy)
  • +10,529 (9.78%) between 2018 and 2023

Population Growth Drivers:

  • Ballarat Gross Regional Product 7.7 billion 2023 (up from 6.7 billion 2019)
  • 62,005 jobs 2022/23 (+3.5% YoY)
  • Construction industry: $623.5m value added; 6,150 FTE

Appendix C: Cross-reference index for other wiki pages

Related pages that should exist and would benefit from cross-references:

Many of these pages may not yet exist in the wiki but are natural next-round compilation targets.

Appendix D: Item-by-item analysis of the BNIF package

Item 1 — Upgrade to Greenhalghs Road, Winter Valley (CoB) — $1.84m

Greenhalghs Road is the primary east–west arterial through Sub-Precinct 2 of the BWGA. The current rural cross-section is inadequate for the residential traffic volumes generated by the Greenhalghs Road sub-precinct. The $1.84m BNIF allocation funds the urban standard road upgrade, including kerb and channel, footpaths, lighting and bus-route capability.

The economic logic is bundling. The BNIF document notes: “A trunk water pipeline on Greenhalghs Road can be more economically delivered if constructed preceding or in coordination with civil upgrade of Greenhalghs Road” (Source: ballarat-west-growth-area-housing-and-growth-enabling-infrastructure-bnif.txt). Bundling the road and water main delivers savings of approximately 15–25% versus delivering separately, because the trench is opened once.

Greenhalghs Road also services the local activity centre and primary school sites in Sub-Precinct 2. Its delivery is therefore a multiplier: the road enables not only residential subdivision but also commercial and school uses, broadening the catchment population that benefits.

Relevance to Bonshaw: indirect. Greenhalghs Road is in Sub-Precinct 2, north of the Bonshaw catchment. However, the bundling of Greenhalghs Road within the BNIF advocacy package strengthens the overall housing-target argument and the political case for the broader package.

Item 2 — Construction of a retarding basin near Delacombe Town Centre (CoB) — $1.05m

This basin is in an existing residential area — i.e., not in a new greenfield subdivision but as a retrofit drainage solution for the Delacombe area. Delacombe Town Centre is the established commercial centre at the eastern edge of the BWGA. The retarding basin addresses existing flood-management needs and supports continued infill development around the Town Centre.

Relevance to Bonshaw: indirect, but related. The drainage philosophy of co-locating basins with sewer infrastructure (as in Bonshaw) is consistent with this Delacombe basin’s role.

Item 3 — Sewer pump station at Schreenans Road, Bonshaw (CHW) — $4.6m

The central item of this analysis. Detailed treatment throughout this page.

Item 4 — Land for drainage basins at Schreenans Road and Bells Road (CoB) — $2.04m

This funds the land acquisition for two drainage basins:

  • Schreenans Road basin — co-located with Item 3 (the SPS).
  • Bells Road basin — at the southern edge of the BWGA, near Smythes Creek.

Both are DCP-identified drainage projects but the BNIF advances the land acquisition to enable Council to take possession before subdivision contributions accrue. Once acquired, Council can stage construction as the catchments develop.

The 2.04m for two basin sites suggests an average of ~1m per basin. At typical Ballarat englobo land values (150,000–300,000 per ha for rural-residential land at the urban edge), this implies basins of approximately 3–7 ha each — consistent with the PSP’s drainage basin land take of approximately 4–6 ha for a typical sub-precinct basin.

Item 5 — Land for Cherry Flat Road duplication and Schreenans Road widening (CoB) — $1.84m

This is the road-corridor land acquisition that enables the future road upgrades to occur. The DCP Items DI_LA_15, DI_LA_17, DI_LA_19 (and others) collectively fund Cherry Flat Road land acquisition; the BNIF advances cash for the most strategic acquisitions (those needed to enable BWGA traffic flow once Bonshaw subdivisions commence).

Cherry Flat Road is a 40m-reservation duplicated link road in the long-term plan. Currently, it is a rural two-lane road. Without the land acquisition, the road cannot be upgraded; without the upgrade, the BWGA traffic network cannot accommodate the additional vehicles generated by Bonshaw subdivisions.

The $1.84m BNIF allocation funds approximately 4 ha of land at typical regional englobo rates. The total Cherry Flat Road land acquisition across the DCP is larger; the BNIF advances strategic portions.

Item 6 — Land for library and community centre at Delacombe Town Centre (CoB) — $0.7m

This is land for a future library and community centre at Delacombe Town Centre, distinct from the Major Activity Centre (MAC) library at Cherry Flat Road. The Delacombe library serves the established Delacombe area and is part of the City’s Community Infrastructure Plan 2022-2037.

Relevance to Bonshaw: t

Section clipped to keep the wiki page within the production size contract. Source files remain in the repository/extracted evidence corpus.

Appendix E: Detailed analysis of the Schreenans Road bridge (DI_RD_31c)

The Schreenans Road bridge over Bonshaw Creek is the single largest DCP item ($17,243,200 in the February 2026 DCP). Its delivery is a long-term consequence of the Bonshaw catchment development, not an immediate enabler — but its design and cost have evolved during the PSP review process and warrant separate attention.

The 2023 Transport Review (SMEC 22/03/23): “The PSP shows Schreenans Road extending over Bonshaw Creek, the bridge is DCP funded at an estimated cost of approximately $9M” (Source: 11-september-2024-council-meeting-agenda-with-attachments-compressed_part3.txt). The 2023 estimate was based on assuming a single span bridge.

Recommendation 19 of the Transport Review: “Either via the PSP / DCP revision or other mechanism, ensure that sufficient land is available for the alignment of Schreenans Road and its intersection with Settlers Drive to achieve normal design minima geometry.”

The February 2026 DCP cost: $17,243,200, a 92% increase over the 2023 estimate. The increase reflects:

  • Construction cost escalation (approximately 30% across infrastructure in Australia 2023–2026).
  • More detailed engineering — the actual span length, abutment design, and creek protection works.
  • Updated approach embankment costs.
  • Updated environmental compliance costs (Growling Grass Frog protection along Bonshaw Creek).

DCP project sheet trigger: “At the completion of both adjoining sections of Schreenans Road” (i.e., DI_RD_31b Schreenans Lane extension west and DI_RD_31d Schreenans Lane extension east).

Funding architecture: Pure DCP item, levied per hectare of NDA across the MCA (973.03 ha). At the project cost of 17.24m, this is approximately 17,720 per NDA hectare contribution from this single item.

Sequencing: The bridge cannot be delivered until both Schreenans Lane extension sections are complete. Both extensions cost approximately $2.4m combined and are expected to be delivered earlier in the staging cycle. The bridge is therefore a mid-cycle deliverable — likely 5–10 years into BWGA Sub-Precinct 1 development.

Implication for Bonshaw: The bridge does not depend on the SPS being delivered first, but its delivery does depend on DCP cash flow generated by Bonshaw subdivisions (which depend on the SPS). The chain is: SPS → Bonshaw subdivisions → DCP contributions → road and bridge items. Without the SPS, the bridge funding accumulates more slowly; the bridge is the largest single beneficiary of fast-tracked Bonshaw development.

Risk: If the bridge cannot be delivered (because cumulative DCP revenue is insufficient or because cost continues to escalate), Schreenans Road’s role as a continuous east–west connector is compromised. This affects the Bonshaw catchment’s traffic resilience and would force traffic onto Cherry Flat Road and Webb Road as alternatives — both of which would need capacity upgrades.

Appendix F: Comparison with other Victorian SPS interventions

The Bonshaw SPS is one of many sewer pump station interventions across Victorian growth areas. Comparable interventions:

Casey-Cardinia (metro Melbourne): Major SPS interventions are funded through Yarra Valley Water and South East Water capital programmes, with developer contributions through these authorities’ New Customer Contribution schemes. Casey-Cardinia growth areas are characterised by larger, more consolidated landholdings, so developer-led delivery is the dominant model.

Wyndham (metro Melbourne): Westernport Water and City West Water (now Greater Western Water) have funded SPS interventions through similar mechanisms. Wyndham growth corridors include some fragmented portions but typically not at the scale of Bonshaw.

Geelong region (regional Victoria): Barwon Water’s growth-area servicing in Armstrong Creek and Lara has involved trunk sewer extensions from Barwon Water’s Black Rock STP. Some interventions have been part-funded by state and federal grants.

Bendigo (regional Victoria): Coliban Water has serviced Bendigo growth areas through trunk extensions. The Marong industrial estate has seen state-funded infrastructure.

Pakenham East (metro Melbourne): South East Water has serviced Pakenham East with major trunk infrastructure including pump stations. Funding has been a mix of capital programme and developer contributions.

The Bonshaw case is distinctive in that:

  1. The infrastructure scale is small (4.6m vs metro Melbourne SPS interventions which can run 20–$50m).
  2. The fragmentation is severe (50+ titles vs typical metro corridors with 10–20 major landowners).
  3. The funding gap is targeted (a single piece of infrastructure rather than a corridor-scale intervention).

The advocacy framing — “$4.6m unlocks 3,500 dwellings” — leverages this distinctiveness. It is a small, specific ask with a quantified housing-target benefit.

Appendix G: Ballarat South STP — the receiving infrastructure

The Ballarat South Sewage Treatment Plant is operated by Central Highlands Water and is the ultimate receiving facility for sewage from the Bonshaw catchment (and most of southern Ballarat). The PSP’s Plan 21 shows the Ballarat South STP at the eastern edge of the BWGA, with the BWGA’s sewer network discharging into it.

Capacity considerations: The Ballarat South STP has a defined hydraulic and biological treatment capacity. Adding 3,500 dwellings (Bonshaw) plus another 12,000+ dwellings (the rest of Sub-Precinct 1, Sub-Precinct 2, Sub-Precinct 4) increases the load on the STP. At approximately 2.5 persons per household and typical wastewater generation of 200 L/p/day, the BWGA at full development adds approximately:

  • 15,839 dwellings × 2.5 persons × 200 L/day = approximately 7.92 ML/day average dry weather flow
  • Plus wet weather peak factors (typically 3–6× ADWF)

Whether the Ballarat South STP can absorb this load depends on its current capacity, current load, and any planned augmentations. None of these are documented in the corpus reviewed; this is a corpus gap.

Plant augmentation: If the STP requires augmentation to accept BWGA flows, this would be a CHW capital project funded through CHW’s pricing submission. Augmentation works are typically multi-year and multi-tens-of-millions in cost. If unfunded, the STP becomes a constraint on BWGA growth even if individual catchment SPS infrastructure is delivered.

Receiving environment: The STP discharges treated effluent to a defined receiving water (often a river or wetland system, or land application). Discharge limits set by EPA Victoria constrain the volume and quality of effluent. Climate change-driven dry conditions may affect dilution and force tighter discharge controls.

The Ballarat South STP capacity is therefore a hidden but material consideration in the Bonshaw analysis. Without confirming STP capacity, the BNIF’s “3,500 dwellings unlocked” claim assumes downstream capacity is available — which may or may not be true.

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This page was compacted for UI and Obsidian readability. The underlying source documents and extracted text remain in the evidence corpus.

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