At a mean outflow of 218 cfs, Island Park Reservoir gained 227 ac-ft yesterday and is 77% full, compared with 72% full on average. Since December 1, the reservoir has filled at 295 ac-ft/day, ahead of the 265 ac-ft/day needed over the remainder of the winter to reach the April-1 target 126,000 ac-ft (93% full). If precipitation in Island Park stays above-average for the rest of the winter, as is expected, the reservoir will reach the April-1 target at an average outflow of 216 cfs, within measurement error of current outflow. If reservoir fill rates deviate too much one way or the other from forecasts, outflow adjustments will need to be made later in the winter to keep the reservoir on track to meet the target.

Reported by: Jimmy's All Seaons Angler

The lower river is very popular in the spring and early summer. Please recognize that access on the lower river is dependent on willing landowners, so be courteous and respectful of private property.