Upper Cascade

As of September 9, 2026, Upper Cascade is filled to 98.1% of its total capacity, holding roughly 2 hm³ of water out of a maximum 2 hm³. At this level the reservoir is high.

Over the most recent week on record the fill level has held broadly steady (+1.0 pts), and it is 5.6 points above its level on the same date a year earlier.

Across the readings we hold for Upper Cascade — 1095 data points between September 11, 2023 and September 9, 2026 — the level has ranged from a low of 78.3% (April 24, 2026) to a high of 100.3% (December 7, 2024). On average the reservoir is fullest around August and at its lowest around April.

The dam at Upper Cascade was completed in 1926. It is operated by BOM primarily for water supply. It lies within the Cascade Creek Basin basin at 33.697°S, 150.299°E.