Hydrohistorian
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Needle Rock Ditch
Ditch / canal gage · 4000501A · Division 4 · Water District 40
Live gage at DWR ↗ · Download daily record (CSV)
Source DWR administrative record · verify at DWR station ↗ Source Our computation, no independent reference · computed here from the screened record
The record
Readings come from the weekly-refreshed cache, never fetched live — the date beside the value says exactly how fresh it is. The live gage is one click up.
Annual flow & trend
Chart: annual mean flow at Needle Rock Ditch, water years 2026 to 2026. The measured record is insufficient data at cubic feet per second per decade. The underlying yearly values are available as a CSV download linked at the top of this page.
Where it sits
Location as DWR records it (3.0).
Provenance
DWR station abbreviation 4000501A; recorded station name “NEEDLE ROCK DITCH”; operated by DWR. Daily flows from the DWR HydroBase snapshot plus CDSS REST updates, refreshed on the weekly cycle. Trend statistics are Mann-Kendall (Hamed-Rao corrected) with Sen's slope in native cfs, the same numbers as the basin Trends tab.