USGS station 16104200
Hanalei River at the Highway Bridge
Hanalei Riv at Hwy 56 Bridge nr Hanalei, Kauai, HI
Live river measurement
Hanalei River at the Highway Bridge
6.84ft
Steady
Gage height· measured 1:10 PM HSTProvisional
- 1 hour
- ±0.00 ft
- 3 hours
- ±0.00 ft
- 6 hours
- +0.01 ft
Trend calculated by Kauaʻi Insider from USGS observations. Changes compare the newest reading with the closest reading to each target time; where no reading is close enough, we say unavailable rather than estimate one.
This is a measurement of the river, not a statement about the road or your safety.
Source: U.S. Geological Survey · Station 16104200
Last observation: 1:10 PM HST
Retrieved by Kauaʻi Insider: 1:32 PM HST
Data status: Provisional — subject to revision by USGS
Official USGS station pageOfficial flood references — USGS 16104200 (bridge)
- NWS Flood Alert Threshold: 7.30 ftLatest reading is below this levelSource: USGS time-series metadata
Gage Operation Limit Low - No NWISweb Line: 6.70 ft. This is an instrument limit published by USGS, not a flood level.
Flood references describe the river only. They do not indicate whether the Hanalei bridge or Kūhiō Highway is open, closed or passable — only the County of Kauaʻi, Hawaiʻi DOT and emergency officials can say that.
Gage height over time
284 observations plotted exactly as USGS published them. Gaps in the line are gaps in the published data — nothing is smoothed or filled in.
Upstream context · USGS 16103000
Hanalei River near Hanalei, Kauai, HI
-0.05ft Steady
Gage height · measured 1:20 PM HST · Provisional
Discharge: 171 ft³/s · measured 1:20 PM HST
This station sits upstream of the highway bridge and uses its own gage datum. Its height cannot be compared with the bridge reading, and neither reading tells you anything about the road.
Source: U.S. Geological Survey · Station 16103000
Last observation: 1:20 PM HST
Retrieved by Kauaʻi Insider: 1:32 PM HST
Official USGS station pageUpstream gage height over time
Plotted on its own axis. The upstream and bridge graphs use different gage datums and are deliberately not drawn on a shared scale.
Official flood references — USGS 16103000 (upstream)
- NWS flood alert threshold: 5.00 ftLatest reading is below this levelSource: USGS time-series metadata · NWS NWPS
- NWS Major Flood Stage: 15.80 ftLatest reading is below this levelSource: USGS time-series metadata · NWS NWPS
Flood references describe the river only. They do not indicate whether the Hanalei bridge or Kūhiō Highway is open, closed or passable — only the County of Kauaʻi, Hawaiʻi DOT and emergency officials can say that.
What gage height is — and is not
Gage height is the river's water-surface height relative to the USGS station's reference elevation. It is not the depth of water over the road.
A high or rising reading does not mean the road is closed, and a low or falling reading does not mean it is open or safe. Only the County of Kauaʻi, Hawaiʻi DOT and emergency officials can say that.
Most near-real-time USGS readings are marked provisional. That is normal: the measurement has not yet been reviewed and may later be revised. We show the status USGS publishes rather than hiding it.
How we calculate change and trend
- The newest valid USGS observation is treated as current. Observations arrive roughly every 15 minutes and can be irregular or delayed.
- For a 1, 3 or 6 hour change we step back from the current observation's time and use the closest observation within 20 minutes of that target. If nothing is close enough we report unavailable — we never interpolate or invent a value.
- Trend is Rising, Falling or Steady over 60 minutes, with changes under 0.05 ft read as Steady. Trend calculated by Kauaʻi Insider from USGS observations. It is not an official USGS status, and there is no "rising quickly" classification because no validated rate-of-rise threshold exists for this gage.
- A reading is flagged as delayed once the measurement is more than 60 minutes old, judged on when USGS measured it — not on when we last connected.
Page data retrieved Sat, Sep 12 · 1:34 PM HST.