About this river
Helena Valley Canal is a 2.3 mile canal near Missouri River Angler in Montana. Streamflow is measured at the USGS gauge Tenmile Creek near Helena MT (site 06063000). The National Hydrography Dataset places it at stream order 5. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1908 to 2025
Helena Valley Canal typically runs highest in May, at a median 90 cfs, and lowest in August, at 1.4 cfs. The highest flow on record for any single day is 865 cfs, in 1927.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 4.8 | 3.0 to 7.8 | |
| February | 5.0 | 3.0 to 7.1 | |
| March | 7.5 | 4.7 to 13 | |
| April | 29 | 14 to 56 | |
| May | 90 | 46 to 168 | |
| June | 60 | 28 to 153 | |
| July | 7.8 | 2.8 to 21 | |
| August | 1.4 | 0.5 to 4.9 | |
| September | 1.9 | 0.7 to 5.9 | |
| October | 6.0 | 3.3 to 13 | |
| November | 7.0 | 4.0 to 12 | |
| December | 5.1 | 3.0 to 9.5 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 61 years of record. Statistics published by the US Geological Survey for Tenmile Creek near Helena MT (site 06063000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Helena Valley Canal's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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