Thanks to all for the nice comments.
@viscera912. Not sure what you mean by sticking the coals. I did crack the lid towards the end to try to get the temp of the pit up. But I that point I figured my fire had about run its course.
The fire had settled in in the 280 - 310 range for a good 6.5 hours or so. Then I did notice temps slowly declining
Thank you all again for taking the time to comment