Thompson Dam has a live cam that takes pictures from dawn to dusk. The earliest image i found was from back in Septemeber 2017.

Here is a timelapse using an image from each day mostly at 10:42 AM however some are 11:42 AM, 12:42 AM and 1:42 PM from September 2017 through to September 2019.

Noticeable is the ups and downs of the water level, most times it rebounds but the winter months 2019 have left it down at this point.

I used some PHP to filter and download the images i needed however these images are quite open and easy to get access to, you can even create your own timelapse on the website.