Bucca Weir

As of September 8, 2026, Bucca Weir is filled to 74.0% of its total capacity, holding roughly 9 hm³ of water out of a maximum 12 hm³. At this level the reservoir is within its normal operating range. Of that total, about 11 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 3.7 points below its level on the same date a year earlier.

Across the readings we hold for Bucca Weir — 1095 data points between September 10, 2023 and September 8, 2026 — the level has ranged from a low of 62.7% (November 5, 2023) to a high of 131.8% (March 10, 2026). On average the reservoir is fullest around April and at its lowest around October.

The dam at Bucca Weir was completed in 1987. It is operated by BOM primarily for water supply. It lies within the Kolan River Basin basin at 24.897°S, 152.071°E.