01 I Low Tech Structures; Building BDAs (Beaver Dam Analogs)

Scott Shahverdian talks about using beaver dam analogs (BDAs) as restoration structures to promote the processes of beaver dam activity.

[@satawamovlogs9112]

Good jod 👍

[@iwanabana]

how do fish pass through the beaver dams @ 8:20?

[@marvinsauer8493]

Very good video. I do have a few suggestions. If these are being built on a “functioning full time stream”, be very careful of the fish species using that stream. Kokanee will not jump a complete obstruction in a stream. If you build these in a stream being used by Kokanee, be prepared, they will be removed. Obstructing fish migration is never a good idea, and where Kokanee are spawning, F&G along with sportsman WILL remove any of these installed in kokanee country. Second, shallow water power boats (jet skiffs and jet skis etc) will cross a beaver dam with ease. Using a very large rock or series of rocks will tend to discourage abuse by shallow water power boats. Set a large rock in center if narrow stream and several large rocks if wide stream. I would save removed waste concrete for this purpose if rocks not readily available. Waste concrete (rebar removed or cut off) is very good for many streams. It provides aggregate as it decomposes and helps “neutralize” low ph streams. These structures are excellent in intermittent streams, and very good in many other places, glad to see they being accepted. Thank you for the video!

[@MrOliverwoods]

I believe, there are studies that show that all natural to the stream fish bypass BDA’s, just like the real ones.

[@SimonHaestoe]

Impossible to listen to this dude screaming at lightspeed.