None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow. Those nearby are listed below.
Nearby, connection not known
Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.
South West Water · into River Neet(S) · 5.4 km away in a straight line · not connected to this gauge on the river map
3 spills · 7 hours in 2025
Not discharging now · last
3 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are not listed.
These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →
🌊 Fairly flashyResponds fairly quickly to rain, with moderate baseflow between events.
Your catchment is all the land that drains rainfall into the river above this gauge. Its character — how
steep, wet, wooded, urban or chalky that land is — decides how fast rain here turns into a rising river. A steep, bare or clay
catchment is “flashy” (rises and falls quickly, floods easily); a flat, chalk or well-wooded one is
slow and steady. The tiles below put numbers to that; the flow-duration curve reads left-to-right
from the river’s typical high flows (Q5) down to its low flows (Q95) — a steep curve means a flashy river.
The physical character of the land that drains to this gauge, and how it shapes its flood response — from the National River Flow Archive (UKCEH).
Most of the rocks in the Tamar catchment are hard mudstones, shales, siltstones, sandstones and minor limestones. A major mountain building event during the Carboniferous Period intensely folded the strata which resulted in extensive fissuring and faulting. The flow duration curve for the catchment is relatively steep through its length because the underlying granite, slate and shale restrict groundwater storage whilst slowly permeable soils in the upper catchment promote rapid surface water runoff. No major catchment changes.
The station
Open channel flood warning gauged installed just upstream of road bridge. Station closed 01/10/2017 and converted to level only site for flood warning.
How it measures flow
ADVP flow gauge installed to assist in flow calculation at site. As site is subject to backwatering from downstream this is used to calculate high flows above a stage of around 1 m, approx 3 m3/s. Flow calculations are made via a combination of a low flow rating and data from the ADVP at higher levels. One peak flow rating across the period of record.
Flow regime
The catchment is predominately rural. Tamar Lakes are found in the catchment. The Upper Lake is a water supply reservoir whilst the Lower Lake is no longer used as a reservoir and so acts as an online pond.
How this gauging station is built and how long it has measured (NRFA / UKCEH).
Gauge type
Ultrasonic
Operating since
2010–2017
Peak-flow record
since 2010
Hydrometric area
47
Measured by
Environment Agency
Nearby Groundwater
Soil Moisture
Frequently asked questions
Is Tamarstone Bridge flooding today?
The latest recorded level is 1.06m. Compare it with the recent history on the chart above to judge whether levels are unusually high.
Is the river level rising or falling at Tamarstone Bridge?
Based on the most recent readings, the level is currently falling. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.
Why is the level slowly falling?
When little or no rain has fallen for a while, a river level gradually drops as the water stored in the ground and soil drains away with nothing to replace it. This is called baseflow recession and is normal in dry spells. Only about 3.9mm of rain has fallen nearby in the last 7 days, so the flow is being sustained mainly by groundwater. A gentle decline like this is expected and is not a sign of a problem — downstream gauges often recede a little faster than headwaters further upstream, and levels recover once rain returns.
How often is this river level data updated?
Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.
Embed this gauge on your website
Free live river-level widget — ideal for parish councils, angling clubs and local sites. Updates automatically.
Preview
📮 Flood risk by postcode near this gauge
Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:
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