River Levels
River Levels

River Allen at Idless Dam

Current River Level

0.106m

At 4:00am, Wednesday 25th August GMT

Within the usual range for this location

Rising, 0.106 from previous measurement

Warning: This data is stale! For some reason, we have not been able to obtain updated levels for over 24 hours. The current displayed level is probably incorrect and you should not rely on it.

View downstream gauge levels

Flood Warning Areas Covering Here

River Allen (Kenwyn) from Idless Dam to Truro

No current or recent warnings.

Helford and Fal Rivers

No current or recent warnings.

Other Nearby Flood Warning Areas

River Kenwyn from New Mill Dam to Truro

No current or recent warnings.

River Kenwyn at Truro

No current or recent warnings.

South Cornwall coast at Truro

No current or recent warnings.

Seven Day Level Chart

Long Term Level Chart

Darker blue shaded areas on long term data indicate maximum and minimum levels for the date (you may need to zoom in closer to see them).

Long term data may have gaps where the API data was not available.

Download long term data as csv

Note: CSV data will include any outlying values that have been ignored by our graphing system as probably erroneous (eg, because they are ridiculously high compared to the values either side of them). It is your responsibility to filter these out if necessary.

Important! If you are planning to retrieve the csv data automatically, you must read and understand the limitations on the data and its availability.

Location and Technical Data

  • Monitoring Station: Idless Dam
  • Watercourse: River Allen (downstream)
  • Nearest Town/Village: St Clement
  • Local Authority: Cornwall
  • Ceremonial County: Cornwall
  • Coordinates: 50°17'5"N 5°3'26"W (50.284843,-5.057324)
  • OS Grid: SW822472 (182296,47237)
  • Mapcode (Local): GBR ZF.W0QW
  • Mapcode (Global): FRA 0898.TV1
  • Open Location Code: 9C2P7WMV+W3
  • Maidenhead Locator System: IO70lg38
  • Environment Agency Location ID: 48115
  • Environment Agency Gauge ID: 48115-level-stage-i-15_min-m
  • Operational Area: Fal
  • Catchment Area: West Cornwall and the Fal
  • UK Hydrometric Area: Fal Group
  • Environment Agency Region: South West
  • Datum Type: Above Stage Datum (ASD)
  • Stage Datum: 1.25m AOD

Please note: Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

The usual range of the River Allen at Idless Dam is between 0.05m and 1.10m. It has been between these levels for 90% of the time since monitoring began.

The highest level ever recorded at the River Allen at Idless Dam is 1.25m, reached on Thursday 7th December 2000 at 8:00pm.

Note that this data may not take account of recent measurements, as we wait until a level has been verified by the Environment Agency before adding it to our records.

Nearby Monitoring Locations

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