Thousands of buildings, highways, and other projects get built every year without requiring the measures CDOT is taking.  You can easily control dust on construction sites with a little water and housekeeping.  This was way over and above what is expected and is just one big concession to the residents for the temporary but minor impacts that construction will have.  This isn't about health or noise is about making the residents life a little better while construction is going on so they don't complain as much.