About this river
Delta-Mendota Canal is a 47.6 mile stream near O'Neill Forebay Rentals in California. Streamflow is measured at the USGS gauge Del Puerto C near Patterson CA (site 11274630). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1965 to 2026
Delta-Mendota Canal typically runs highest in March, at a median 4.8 cfs, and lowest in July, at 0.0 cfs. The highest flow on record for any single day is 1,870 cfs, in 1998.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 2.4 | 0.8 to 9.5 | |
| February | 3.8 | 1.5 to 22 | |
| March | 4.8 | 1.3 to 22 | |
| April | 3.0 | 0.7 to 12 | |
| May | 0.7 | 0.1 to 4.8 | |
| June | 0.1 | 0.0 to 1.4 | |
| July | 0.0 | 0.0 to 0.0 | |
| August | 0.0 | 0.0 to 0.0 | |
| September | 0.0 | 0.0 to 0.0 | |
| October | 0.0 | 0.0 to 0.0 | |
| November | 0.0 | 0.0 to 0.0 | |
| December | 0.0 | 0.0 to 1.8 |
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 Del Puerto C near Patterson CA (site 11274630). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Delta-Mendota 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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