Reservoir · South Australia · Australia · BOM Water Data Online
Happy Valley
96.0% full
Capacity
12.6 hm³
Volume stored
12 hm³
River
Off-stream
Year completed
1897
Coordinates
35.072°S, 138.572°E
Last updated
2026-09-05
Current fill
96.0%vs 7 days ago
+0.2%gaining
vs 1 year ago
+13.0%year-over-year
7-day trend
→stable
Data source: Bureau of Meteorology — Water Data Online (KiWIS) — daily mean storage volume, quality-controlled. Capacity from the BOM Water Storages ArcGIS layer (total design capacity in ML). Last reading: 2026-09-05.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -35.072, 138.572 · Open in Google Maps
About Happy Valley
As of September 5, 2026, Happy Valley is filled to 96.0% of its total capacity, holding roughly 12 hm³ of water out of a maximum 13 hm³. At this level the reservoir is high. Of that total, about 9 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it is 13.0 points above its level on the same date a year earlier.
Across the readings we hold for Happy Valley — 1090 data points between September 10, 2023 and September 5, 2026 — the level has ranged from a low of 77.6% (November 16, 2024) to a high of 98.5% (October 20, 2024). On average the reservoir is fullest around October and at its lowest around November.
The dam at Happy Valley was completed in 1897. It is operated by BOM primarily for water supply. It lies within the Off-stream Basin basin at 35.072°S, 138.572°E.
Key facts
- Current fill level
- 96.0%
- Water stored
- 12 hm³
- Total capacity
- 13 hm³
- Usable capacity
- 9 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 13.0 pts
- Primary use
- Water supply
- River
- Off-stream
- River basin
- Off-stream Basin
- Year completed
- 1897
- Operator
- BOM
- Coordinates
- 35.072°S, 138.572°E
- Last updated
- September 5, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 5 Sep 2026 | 96.0% | 12 |
| 4 Sep 2026 | 95.5% | 12 |
| 3 Sep 2026 | 95.2% | 12 |
| 2 Sep 2026 | 94.8% | 12 |
| 1 Sep 2026 | 94.8% | 12 |
| 31 Aug 2026 | 95.2% | 12 |
| 30 Aug 2026 | 95.5% | 12 |
| 29 Aug 2026 | 95.8% | 12 |
| 28 Aug 2026 | 96.2% | 12 |
| 27 Aug 2026 | 96.5% | 12 |
| 26 Aug 2026 | 96.7% | 12 |
| 25 Aug 2026 | 96.2% | 12 |