My dream sewer manhole

It may not be very common to dream about wastewater sewer manholes, but today we will. For us at Preventos, sewer manholes are essential for providing data‑driven sewer network management to our customers. The quality of raw data and the resulting data analysis depends greatly on the characteristics of the manhole chosen for measurement. I dream of a saddle manhole through which water flows as a well‑developed open‑channel flow. The flow cross‑section remains unchanged at and near the manhole. The direction and slope of the sewer also remain consistent at the manhole. What kind of sewer manhole do you dream of?