Road closures happen for emergency and non-emergency reasons. In recent memory roads have been closed due to train carriages across the road, bridge instability after accident and even for flash flood taking out the highway and/or causing sink holes in the highway. Roads can also be closed for many other emergency and non-emergency reasons and for extended periods, sometimes without notice.
Living in Coal Creek Canyon it is valuable to know the four main entrances / exits that the canyon has available, so you are able to navigate around unexpected and/or extended closures.
Perhaps visit or take your family on a visit to the main north and south routes in good weather to check them out before you need them. They are gloriously scenic routes worth a visit, and a picnic / hike.
Note: It is not hard to know and find these routes from inside Coal Creek Canyon, heading out. However, do you know how to find them from outside Coal Creek Canyon heading home?