Sewage Overflows in Mana Esplanade

A large volume of sewage was recorded discharging from manholes along Mana Esplanade and flowing into the Inlet after last Wednesday's downpour (11 June 25). This is not unusual, it's been happening for years, but the freequency and volume of polluted discharge is increasing (not helped by housing intensification in the area).
A short video of the discharge was taken and sent to the Council. Unfortunately our wesite doesn't show videos. So, here is a still photo from it.
The Paremata Residents Association has reported these discharges to both the Council and Wellington Water on many occasions and raised it in annual and long term plans (LTP), but nothing changes. Wellington Water has investigated previously and bolted down a few manholes. But that that doesn't solve the problem.
The only practical solution to this unacceptable situation is to replace and upgrade the sewer pipe from St Andrews Road to south of the Paremata Bridge. The Porirua City Council know this but cost always gets in the way. Replacement of the sewer pipe was included in the last LTP for 2030, but now it has disappeared from any priority list.
How many more years do residents of this area, and anyone enjoying the Inlet and foreshore, have to suffer this pollution?