In The Beginning
While conducting some spawning survey work on the Jumpingpound Creek in the early 90’s, I did an inspection on an eroding stream bank next to a road into the Wine Glass Ranch. My main concern that all of the sliding clay off of the eroding bank, was washing into the JP Creek. I contacted the land owner and we discussed some options to carryout some remediation work for the erosion site. It was decided that Bow Valley Habitat Development would handle the project, if I could get an engineer from Alberta Environments, River Engineering Branch. That engineer was Sheldon Lowe.
This resting pool thing reminds me of an interest story I have to tell. When the local TU Chapter was planting willows along the creek, we all stopped at a resting pool to look for rising trout. When none were spotted, I caught a grasshopper and threw it in the current, just upstream of the resting pool. As the grasshopper drifted over the deep water, a trout lunged up to take the hopper on the surface. We all spent the next 10 minutes, feeding trout in the resting pool.
Sheldon had already helped out with a resting
The copy shown above is the original plan for the erosion site. The rock deflectors are angled at 30 degrees upstream, to repel the fast flow on the outside of the stream bank and move the fast flow of current, to the middle of the stream channel. This stops the erosion at the toe or base of the high outside of the stream bank. The design is similar to the Benway weir design, but the rock structures don’t go all of the way across the channel.
Below, are two photographs of the rock repelling deflectors on the outside of the stream channel, after the project was completed. The first photo shows the project site, one year later, and the second photo shows how the deflectors work during high flows in the stream.
The project site has been monitored over the years, by Bow Valley Habitat Development, and it is remarkable how well the design of protecting an eroding stream bank like this, has been. Over time, the stream channel has changed direction and now it is further to the north east, where a natural sandstone rock outcropping is now protecting the stream channel. The eroded stream bank slope will take years to settle and recover, but now there is no clay loading into the stream every year.