A quarter mile diversion can't take that long to dig. The whole canal is 120 miles, so an extra quarter mile they should be able to dig in a few days I would think?
"Quarter mile" is a linear dimension. What is the width?
If you had to estimate the volume of earth in that 'quarter mile', and then estimate the size of an excavator bucket, and the capacity of a dump truck, and the availability of all those things at any given time (even if you ship them in), you'd soon realize that just digging out that earth will take more time.
On top of that, there's going to be FLOW in the canal - what will your diversion to for erosion, pressure on the locks, etc.
You risk damaging the canal itself to deal with a temporary problem if you think you can just 'dig around it' in 5 days. My bet is you've never seen how long it takes to plan something with this much risk involved.
This isn't software, you aren't going to Agile it away if you screw it up.
> The whole canal is 120 miles, so an extra quarter mile they should be able to dig in a few days I would think?
Uh, what? Why would the length of the canal as a whole tell you anything about how long digging a quarter-mile section would take? If the canal as a whole was longer or shorter, would that somehow change your estimate?
Yes it would... I know the suez canal was a once-per-century type infrastructure investment for Egypt. Doing that same investment again probbaly isn't feasible. But doing 0.2% of the work again is starting to sound pretty affordable...