Coralville Lake, IA

As of 2026-10-13, Coralville Lake sits at 686.43 ft, which is above average for this time of year. That is 3.43 ft above full pool of 683.00 ft. It is still 25.6 ft below the flood pool of 712.00 ft. Over the past 30 days the level has risen 2.41 ft.

The most recent reading at Coralville Lake is 686.43 ft (2026-10-13), sourced from the U.S. Army Corps of Engineers. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Coralville Lake in our records is 710.93 ft on 2018-10-18. The lowest is 678.78 ft on 2016-03-25. Our record covers about 13 years of readings.

Compared with every October in our records, the current level is higher than 77% of them, which we classify as above average 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. Coralville Lake has risen 2.41 ft over the past 30 days. For the operational reason on any given week, check the U.S. Army Corps of Engineers directly.

Coralville Lake is +0.54 ft compared with this date last year (686.43 ft today). The full-history chart above covers 13 years, with a record high of 710.93 ft and a record low of 678.78 ft.