The River Finn is one of the major salmon rivers in the Foyle catchment. The counter is situated at Killygordon and has been in operation since December 2000.
The Finn site has a 4-channel crump weir spanning the breadth of the river at this location. Each channel is built to a different level with the two central channels set at a lower level. The reason for the lower level channels is to enable all migratory species that use this river to get over the weir at lower water levels.
Below is the net up count for Finn Counter on the River Finn from 2012 to 2021
| Year | Net Up Count |
|---|---|
| 2012 | 2190 |
| 2013 | 2715 |
| 2014 | 3748 |
| 2015 | 2953 |
| 2016 | 2588 |
| 2017 | 1985 |
| 2018 | 3955 |
| 2019 | 4247 |
| 2020 | 2302 |
| 2021 | 2409 |
| 2022 | 1194 |
* Please note that an average count has been added from May-August 2022 due to one of the channels not being operational.
Location of Counter
Site Details - Partial Count
| 1 | Width of River at weir during high flow | 27m |
| 2 | Sluice Gate | 1.5m |
| 3 | Breadth of Channels/Arrays: | 25.5m |
| a. Channel 1 | 8m | |
| b. Channel 2 | 4.5m | |
| c. Channel 3 | 5.5m | |
| d. Channel 4 | 7.5m | |
| 4 | Electrode Total Length: | 82.5m |
| 5 | Width Not Covered by Array | 0.0 |
| 6 | Operational Start Date | Dec 2000 |
| 7 | First Data Set | Dec 2000 |
| 8 | Camera | 4 x Arial |
| 9 | Camera Coverage | 2 – C1 & C4 |
| 10 | Required Salmon Upstream every year | 5410 Management Target |