I am using Windows 7, Pro (64-bit) and found the chkdsk logs in:
Event Viewer > Windows Logs > Application
Sort by 'Source' and look for 'Chkdsk' as the source. The Event Viewer will list each scan. Click on the desired scan to view both system-event information and scan results in the preview pane; if you don't see a preview pane, you can turn it on in the 'View' menu or simply double-click the log entry to open it in a separate window.
You can save it as a text file by clicking the 'Save Selected Events...' action button in the action panel. Then, give the text file a name and use the 'Save as type:' menu to choose 'Text (tab-delimited) (*.txt)'
Then click 'Save'.