Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant water level

What this means

Canyon Ferry Lake Dam Powerplant and Helena Valley Pumping Plant is at 3,784.55 ft, in the normal range for mid-October.

That puts it 1.14 ft below the median of 3,785.69 ft for mid-October, based on 36 years of readings. A year ago it stood at 3,782.58 ft (+1.97 ft).

It has risen 0.10 ft over the past week. In the last month it has stayed between 3,784.39 ft and 3,785.38 ft.

Many reservoirs are drawn down through summer and fall; most of the refill comes later, with winter rain or spring snowmelt.

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date

3,785.69 ft1.14 ft below the median for this date

Normal for this date

3,781.77 ft – 3,792.03 ft8 years in 10 fall in this range (36 years of records)

Same day last year

3,782.58 ft+1.97 ft

Lowest and highest in 30 days

3,784.39 ft – 3,785.38 ft

Lowest and highest in 12 months

3,782.64 ft – 3,791.34 ft