Two Flow Monitoring Manholes for western North Carolina.  The manhole on the left integrates a Siemens magnetic flow meter. The manhole on the right integrates a Parshall flume.  

The mag meter manhole is provided with a traffic reducer top, while the Parshall flume manhole one on the right has a domed fiberglass top.  The traffic reducer uses standard grade rings / frame / cover to bring the unit up to grade, while the domed top manhole is inteneded for installation where there is no foot or vehicular traffic.