Marys Lake Power Plant Water Level

As of 2026-01-01, Marys Lake Power Plant sits at 8262.04 ft, which is high for this time of year.Over the past 30 days the level has held steady 0.00 ft.

The most recent reading is 8262.04 ft (2026-01-01), sourced from the U.S. Bureau of Reclamation. Readings on this page refresh automatically as the agency publishes new data.

The highest level in our records is 8311.8 ft on 2022-04-01. The lowest is 0.0 ft on 1951-04-01. Our record covers about 74.8 years of readings.

Compared with every January in our records, the current level is higher than 94% of them — high for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Marys Lake Power Plant has held steady 0.00 ft over the past 30 days. For the operational reason on any given week, check the U.S. Bureau of Reclamation directly.

The level is +0.02 ft compared with this date last year (8262.04 ft today). The full-history chart above covers 74.8 years, with a record high of 8311.8 ft and a record low of 0.0 ft.