From my personal standpoint as an archivist, what is crucially important regarding such archives is how the data should be utilized in the future.
When you compare the timeline which was mapped after the Great Hanshin-Awaji Earthquake, and the one for the recent Great East Japan Earthquake, the timing for the necessary projects becomes visible. The two earthquake disasters were different in the degree and nature of damage, yet brought similar mental impacts to the victims. One can visualize in both the physical and mental aspects, when the victims needed something and when the actual launching of projects took place; such as when temporary housing was needed, and when to relocate to permanent housing.
Although not directly related to critical infrastructure, art events can be considered an important element as mental liberation for the victims.
Establishing consistency between the time axis of basic human desires and external projects has a great utility value in the future launchings of projects after earthquake disasters.
On the other hand, the semantics of the projects visible from the timeline of the archive are also important. There are long lasting projects. There are short projects that last a long time, repeating periodically, and those that end quickly.
We must especially investigate the reasons of the short lived projects. Did the project itself have a purpose only in the short term? Or did it have to be terminated for a reason such as a budget issue? Or maybe it was an idea that did not convey itself to the victims but was just a self-serving on the part of the organizers to begin with.
Such verification shall be a useful lesson for future projects.