Total water withdrawn from the Bow and Elbow rivers each year. Annual withdrawals have stayed in a narrow band since the late 1990s. Two reference lines are shown:

• ■ Provincial licence (Bow): ~460,000 ML/yr — the legal upper bound on diversion.
• ■ Plan operational cap:233,000 ML/yr through 2040 — the Water Efficiency Plan’s self-imposed ceiling, set below licence to stay within river-ecology limits during low-flow years.

Treatment-plant capacity is shown on the daily chart, where it’s the binding ceiling (plants are rated daily, not annually).