Blanche Harbor flood map & planning overlays
A planning-constraint profile of Blanche Harbor
(Port Augusta City Council, SA) - 1.81 km², mapped from live council and
state overlay data. This suburb is highly constrained.
Profile updated 26 September 2026.
Suburb-wide figures; the free map shows which overlays touch your lot.
Constraint readout
1.81 km² - this suburb is highly constrained by planning overlays.
Elevation hillshade with street names, clipped to Blanche Harbor's boundary, with the flood, bushfire and environmental overlays drawn on top.
Nearby suburbs, nearest first
Aircraft noise and flight paths over Blanche Harbor
Two different things, kept apart on purpose. The ANEF contour is the planning instrument - a forecast published per airport that planning schemes use to control noise-sensitive development. Observed overflight is what a sampled aircraft-tracking feed actually recorded over the suburb - where aircraft flew, how low and how often.
Observed overflight - sampled to
Night movements: not established - night is sampled as often as day, but too few night flights have been seen here to conclude either way.
Traffic is sampled rather than watched continuously, so every figure is a floor: aircraft not captured between samples are not represented. Rates are per 500 m square - the busiest square in the suburb, not a count of flights over the suburb - and a square is only rated where enough traffic was seen to measure it. Altitudes are above mean sea level. Flight paths change with runway use, weather, season and airspace design. This is a record of observed traffic; it is not a noise contour and not a planning control.
Blanche Harbor at a glance
How Blanche Harbor is zoned
Selling in Blanche Harbor? The zone and overlays on this page are the Planning and Design Code controls a Form 1 vendor's statement has to disclose.
Across its 1.81 km², Blanche Harbor is highly constrained by planning overlays. Flood mapping covers the suburb and none of it falls within a mapped flood overlay, and 33% is flagged bushfire-prone. The dominant land-use zone is Coastal Waters and Offshore Islands. The median lot measures about 1,094 m² across 49 parcels.
Who lives in Blanche Harbor
Census 2021 figures published by the ABS for the Blanche Harbor suburb boundary itself, not a wider region.
Socio-economic standing
ABS SEIFA 2021 ranks every Australian suburb. Decile 1 is the most disadvantaged tenth of the country, decile 10 the least.
Score 973, and decile 5 within South Australia. The national average is 1000.
Population trend, 2001 to 2025
Estimated resident population of Quorn - Lake Gilles, the wider ABS statistical area containing Blanche Harbor. There is no annual population series published at suburb level, so this describes the surrounding area rather than Blanche Harbor itself.
2,274 in 2001 to 2,170 in 2025, down 5%.
Source: ABS Census 2021 and SEIFA 2021 (Suburbs and Localities), Regional Population (SA2), CC BY 4.0. Small counts are randomly adjusted by the ABS.
Blanche Harbor data sources and coverage
“Not mapped” means we hold no source layer for this suburb - never an all-clear.
| Dataset | Coverage | Publisher |
|---|---|---|
| Flood mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Bushfire-prone mapping | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Zoning | Mapped | the South Australian Planning and Design Code and Location SA spatial data |
| Heritage and environment | Mapped where published | the South Australian Planning and Design Code and Location SA spatial data |
| Aircraft noise contours (ANEF) | Not held | the South Australian Planning and Design Code and Location SA spatial data, Defence |
| Observed flight paths | Observed | adsb.lol, under the Open Database License |
| Demographics | Available | Australian Bureau of Statistics (2021 Census and SEIFA) |
Profile last materially updated 26 September 2026. See the methodology and full source list. Source data changes over time and critical decisions should be checked with the responsible authority.
Check a specific Blanche Harbor address
See exactly which overlays touch a single property - the interactive map is free. Need it on paper? A full planning PDF is just $9.
Building or pricing a slab? The $119 geotechnical desktop report covers geology, soils, bores and an indicative AS 2870 site class for a Blanche Harbor lot.
See what's in the $9 report →Blanche Harbor planning - frequently asked
Is Blanche Harbor flood-prone?
Flood mapping covers Blanche Harbor and none of the suburb falls within a mapped flood overlay (the council-wide suburb average is 1%).
Is Blanche Harbor bushfire-prone?
Around 33% of Blanche Harbor is mapped as bushfire-prone, compared with a Port Augusta City Council average of 76%.
Is Blanche Harbor under a flight path?
No aircraft were observed over Blanche Harbor in the period sampled (recent weeks to now). Sampling is intermittent, so that is a floor rather than proof that none fly over. Traffic is sampled rather than watched continuously and flight paths change with runway use, weather and season; the ANEF contour is the planning instrument.
What is the zoning in Blanche Harbor?
The dominant planning zone in Blanche Harbor is Coastal Waters and Offshore Islands, though the suburb also includes Rural Shack Settlement and Commonwealth Facilities.
Does Blanche Harbor have heritage-listed places?
No heritage-listed places are on record within Blanche Harbor.
What is the typical lot size in Blanche Harbor?
Across 49 surveyed parcels in Blanche Harbor, the median lot size is about 1,094 m².
Is Blanche Harbor an advantaged suburb?
On the ABS SEIFA 2021 index of relative socio-economic advantage and disadvantage (IRSAD), Blanche Harbor scores 973 and sits in decile 5 of 10 nationally and decile 5 within South Australia (decile 1 is the most disadvantaged tenth, decile 10 the least).
Compare nearby suburbs
| Nearby suburb | Distance | Flood mapped | Bushfire-prone |
|---|---|---|---|
| Commissariat Point | 9.5 km | 0% | 46% |
| Winninowie | 14.7 km | 0% | 78% |
| Miranda | 15.7 km | 0% | 55% |
| Port Paterson | 16.3 km | 6% | 69% |
| Douglas Point The Corporation of the City of Whyalla |
18.4 km | 0% | 74% |
| Stirling North | 21.0 km | 1% | 97% |
| Nectar Brook The District Council of Mount Remarkable |
21.4 km | 0% | 100% |
| Port Augusta | 21.8 km | 0% | 68% |
| Douglas Point South The Corporation of the City of Whyalla |
21.9 km | 0% | 80% |
| Mambray Creek The District Council of Mount Remarkable |
23.4 km | 0% | 89% |