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Victoria is pushing hard to change the cultural and include ESC in mining and quarries

Hi Douglas, Thanks for using the forum - hopefully we will see more on it soon! Equation B28 is just Equation B27 with the velocity set to 0.015m/s. The 66.7 is (1/0.015). So if you use Equation B28, the velocity is set to a maximum of 0.015m/s. The equation you have rewritten will actually cancel out (you'll be left with 1/66.7 = 0.015m/s. The issue you might be having with veocoity is that the velocity in the calculations is not calculated at the settling depth, but at the floc depth. This floc depth in Option 2B may be lower than the settling depth and hence why other calculations you are getting don't seem to correlate. Does that help? Thanks Kyle

Thanks Kyle, Nice to see this is a good place for a technical question. And quick. I had tried to use equation B27 straight into my spreadsheet, hence the problem. Iâll continue to use the average (taking batters into account) width of DF to calculate velocity. I guess it follows that we would use DF not DS when checking upstream velocity when specifying the spillway width in a 2B basin also. Thanks for your input. Doug

I am not sure Bec. I think that could present problems for developers with long construction timeframes? How do you think it would look/feel?

On sites with dispersive soils I think surface roughening will lead to additional problems. The aim being not to have any water pooling or siting for long periods.

I like <a href="https://">goole.com</a>

Looks great Sandra

Emmerson Aggregate test for a quick in field test. Depending on outcome then more detailed lab testing if dispersability is an issue. SCS has a soils lab that can do testing for you.

Great to have you on board and looking forward to an exciting IECA field demo day today.

Welcome. Hereâs to a great conference.

does it work?

All good.

I am also. It will be a great opportunity for learnings from each other.