Historic monitoring evidence · Environment Agency
1704.00 Calva Hall, River Marron
Cumbria and Lancashire · survey site
This page records ecological survey evidence. It is not proof of current fish presence, abundance, fishing quality, access, permission or safety at this location.
Observed taxa
What monitoring recorded here
Taxa are ordered by latest survey date. Counts and records reflect monitoring events, not an angling forecast.
Brown / sea trout
Salmo trutta- First record
- 24 Jul 2002
- Latest record
- 11 Aug 2025
- Survey events
- 17
Atlantic salmon
Salmo salar- First record
- 24 Jul 2002
- Latest record
- 11 Aug 2025
- Survey events
- 17
European eels > elvers
Anguilla anguilla- First record
- 20 Jul 2005
- Latest record
- 11 Aug 2025
- Survey events
- 13
European elvers
Anguilla anguilla- First record
- 24 Jul 2002
- Latest record
- 11 Aug 2025
- Survey events
- 11
European eel
Anguilla anguilla- First record
- 24 Jul 2002
- Latest record
- 21 Jul 2006
- Survey events
- 4
Rules and access
Check before you travel.
Environment Agency ecology records do not carry fishing-rights boundaries or live restrictions. Confirm the fishery owner, permission, local byelaws, seasonal rules, safety notices and current conditions before setting out.
Check live freshwater fishing rulesProvenance
Source, licence and boundary
- SourceEnvironment Agency Ecology & Fish Data
- LicenceOpen Government Licence v3.0
- Source copy retrieved23 Jul 2026
- Terms checked23 Jul 2026
- CoverageHistoric monitoring evidence, separately dated per record
- Not assertedCurrent presence, access, permission, fishing quality or safety