The entire herd is not infected with CWD there. CWD has spread across a bunch of different units throughout the state, but that doesn't mean that every animal has it. It is a pretty rare disease even though it has spread so much.
I killed a deer there with a left over tag. It tested positive for CWD, when they contacted me to give the results, he was concerned if I had consumed any of the meat, and I replied no. He then asked me to donate the meat for further testing, and then told me the entire herd was infected, that is one of the worst areas for CWD, along with all the front range south to Colorado Springs. The Castle Rock area is also very bad. If the deer have it so do the elk.