How many fish died as a result of draining clypse reservoir?
| Authority | [[manx-utilities-authority |
| Date received | 2025-11-18 |
| Outcome | Some information sent but not all held |
| Outcome date | 2025-12-04 |
| Topic | [[environment-agriculture |
Summary
The request sought information on fish mortality and replacement costs due to the draining of Clypse Reservoir. The authority disclosed a risk assessment detailing mitigation strategies to relocate fish rather than kill them, but did not provide specific mortality counts or financial costs.
Key Facts
- Fish stocking was paused in early July 2025 to allow fish to relocate.
- Slow water release was implemented to enable fish to leave via conduits to Kerrowdhoo.
- Stranded fish were to be relocated by DEFA to Kerrowdhoo.
- The reservoir water level was reduced at a rate of less than 300mm per day.
- The risk assessment identified 'Fish killed' as a potential hazard with a high initial risk score of 25.
Data Disclosed
- 06.08.2025
- early July
- <300mm a day
- 25
- 5
- 1
- 12
- 6
- 3
- 9
Original Request
I am looking at finding out how the draining of clypse reservoir has impacted the wildlife and mainly the fish living in the body of water.I would like this information to be made available.
Also i want to know if they have been replaced and at what cost to the tax payers.