How the Holt Fish Pass has changed fish migration on the River Severn!

The Holt Fish Pass is an incredible feat of engineering which helps to open up 150 miles of the river Severn in England for Salmon, Twaite Shad and other migratory fish. In this video we take a look at how it was built and what challenges the engineers had to overcome to complete this project during one of the wettest periods ever recorded in UK history! #HoltFishPass #RiverSevern #WildlifeConservation Join the CATCH FISHING CLUB on Patreon for member events, live streams and exclusive videos https://www.patreon.com/c/catchfishingchannel Book a Fishing Day https://www.catchfishingchannel.co.uk/ Improve your fishing FAST at https://catchfishingchannelcourses.thinkific.com/ Catch Fishing Store https://www.catchfishingchannel.co.uk/book-a-fishing-day/ The Gear I Use! https://www.catchfishingchannel.co.uk/gear-i-use Follow Catch Fishing Channel: Patreon https://www.patreon.com/catchfishingchannel Facebook https://www.facebook.com/profile.php?id=61552579535958 TikTok https://www.tiktok.com/@catch_fishing_channel Follow Jamie Harrison: Facebook https://www.facebook.com/profile.php?id=61552657351898 Matrix Website https://www.fishmatrix.co.uk/ Sonubaits Website https://www.sonubaits.com/en The music I use: https://share.epidemicsound.com/3ci80n Show Notes: Fish Pass Engineering at Holt Weir Introduction Holt Weir - Topic: Engineering of the fish pass at Holt Weir - Purpose: To enable fish like salmon and twait shad to reach their natural spawning grounds 1. Challenges in Construction - Holt Weir fish pass was the most challenging among the four constructed on the river. - Difficult access due to steep valley sides required transportation by boat. - Equipment, including a 100-tonne crane, was transported on a floating pontoon. - Concrete was delivered in skips on barges and had to be poured immediately upon arrival. 2. Design and Functionality - The fish pass features a vertical slot design with eight chambers. - Each chamber slows down water flow, allowing fish to rest before moving to the next chamber. - Fish exit at the upstream end, gaining access to the river above the weir. 3. Construction Timing - Construction coincided with the wettest day on record in the UK (3rd October 2020), causing delays. 4. Innovative Design Elements - Chambers slow river flow, with channels on the sides for faster water passage. - Positioned at the upstream end of the weir where the main flow attracts fish. 5. Comparison with Other Fish Passes - Similar design to Diglis Fish Pass but with different outer wall construction. - Lego-style interlocking bricks used due to poor access and shallow bedrock. 6. Importance of Fish Pass Positioning - Located at the upstream end of the weir where most flow occurs. - Ensures fish are drawn to the fish pass entrance. Conclusion - The project aims to open up 150 miles of river for migratory fish. - Encourages viewers to engage with the content by liking, subscribing, and commenting. Call to Action - Like the video if you enjoyed the insight. - Subscribe for more content on fishing and engineering. - Comment below if you want to see more site visits and insights. Thanks for watching! _________________________________________________________________ #matchfishing #livematchfishingfilms #livematchfishing