Monday 11th August
Report written by James Smith
Tonight we were tasked with inspecting the various types of fish passes on the weirs of the River Don for the Don Catchment Rivers Trust (DCRT). This is to make sure that fish are free to complete their migrations upstream unencumbered. The main species to make use of these are salmon, trout, and grayling, along with dace, chub, and barbel. The passes also help eels and other fish species navigate weirs that were previously impassable. The data and photographs we record are used by the DCRT to assess which passes need maintenance. Thankfully, on this occasion all of the passes we inspected were fully functioning with no obvious damage.
A fin-tastic time was had by all
We managed to survey three weirs- Lady's Bridge, Walk Mill, and Burton Weir- before running into a blocked section of path, which I thought, wrongly, that we would be able to negotiate. We did discover that this section was blooming with blackberries and rosehips, if any foragers are looking for a tip-off. The fenced-off section is absolutely thriving with no foot traffic passing through.
The following is the gathered inspection data for each of the passes. Lady's Bridge: Clear at top. Clear at bottom. Flowing freely. No damage visible or debris present. Walk Mill: Clear at top. Clear at bottom. Flowing freely. No damage visible or debris present. Burton Weir: Clear at top. Clear at bottom. Flowing freely. No damage visible or debris present.
Sheffield's industrial past saw the implementation of weirs on the River Don to power the factories. These flow control devices inhibit natural migratory paths for fish. To combat this, fish passes have been installed at the weirs throughout Sheffield. These are important for the movement of fish (particularly salmon) between habitats and breeding grounds. The Don Catchment Rivers Trust have been working on the River Don to bring back the salmon population to the area and now efforts are needed to maintain this. GoodGymers will be part of long term surveying and monitoring of the fish passes to ensure they have not been blocked and remain fully functional.
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