You should find it there.
I assume you mean open the "event viewer", under the "Windows Logs" folder open the "Application" folder and in the "Source" column look at the "Winlogon" entries. All thats ever shown are 2 different event notifications. NO chkdsk logs. (...and I checked a months worth of "Winlogon" entries.)
There should be actual files (*.log or *.txt) located either on the "root" drive or the "Windows" folder that contain the info of what occured during the execution of the CHKDSK command before bootup. At one time it could be found in the "bootex.txt" file, but I can find no such animal in Win7.