Yes, the pipe is flowing full. I forgot to mention that the manhole is permanently flooded so I can't use an ultrasonic meter. I will check if the funding is available for magmeters, as many new meters are needed and my company's preference is turbine. Thanks to all.
I am currently working on a water audit in which we have tried (somewhat unsuccessfully) to log flow through a 12" DI pipe. We have only tried a turbine insertion meter which has worked on and off, it has stretches where it logs data just fine for a couple of weeks, maybe a month, but eventually...