The fish pass is the second of four being built along the River Aire by the Environment Agency and Suttle Projects.
The £2.7m river restoration scheme will see a pontoon bridge at Kirkstall and Saltaire, with further work at Armley and Newlay later this year.
Every Autumn, salmon swim to the upper reaches of rivers to lay their eggs, resulting in the famous 'leap' as they make their way upstream.
Now 'fish passes' are being installed to allow the salmon to detour four weirs blocking their way from Leeds to Malham on the River Aire.
It is hoped that salmon, eel and other migratory fish will once again be able to access their historic spawning sites - after an absence of 150 years.
The Aire River Trust posted the aerial footage on Friday, showing the construction of the salmon pass at Kirkstall Weir.
The trust said: "Kirkstall Weir during early stages of construction. You can see a coffer dam in position to dry out the working area.
"Going upstream from Leeds city centre, this is the second of the four weirs that the Environment Agency and Suttle Projects are building a fish pass on as part of Developing the Natural Aire project in partnership with The Aire Rivers Trust.
"This project will reconnect 60km of the river to enable fish to breed, feed and shelter. It is hoped that this will encourage the return of Atlantic salmon to spawn after an absence of 150 years.
"We want to work with local communities to celebrate and embrace our fantastic river."
Thank you for reading this story on our website. These are challenging times but the team at the Yorkshire Evening Post need your support more than ever in the weeks ahead.
While I have your attention, I also have an important request to make of you. In order for us to continue to provide high quality and trusted local news on this free-to-read site, I am asking you - wherever possible and providing it is safe for you to do so - to also please purchase a copy of our newspaper.
Inevitably falling advertising revenues will start to have an impact on local newspapers and the way we continue to work during this period of uncertainty. So the support of our readers has never been more important as we try to make sure that we keep you connected with the city you live in during this time. But being your eyes and ears comes at a price. We need your support more than ever to buy our newspapers during this crisis.
Our team of trusted reporters are working incredibly hard behind the scenes- from kitchen tables and spare bedrooms - to look at how we can do this and your continued support to the YEP will help to protect its viability in the days and weeks ahead.
For more details on our subscription offers please visit www.localsubsplus.co.uk/YEP, email [email protected] or call us on 0330 4033004