Alan Dickens, Brunswick Heads
The Water & Waste Sewer Advisory Committee (WWSAC) submitted to the elected council that a five-year plan of the investigation was to be undertaken into the Inlow/ Infiltration (I/I) problem that was occurring in the Mullumbimby gravity mains.
The elected council endorsed this strategy. They also agreed to $500,000 a year in funding for this investigation.
A contractor inspected both sewer mains and stormwater mains with a CCTV camera and submitted a report to the WWSAC. The WWSAC accepted that the contractor could reline the mains and rectify the I/I problem. The contractor has completed the work.
I have a question for the three councillors and the mayor, who sit on the WWSAC.
My question is, if the work has been completed with the intention of solving the I/I problem in Mullumbimby, how does the WWSAC explain these inflow figures into the Brunswick Valley Wastewater Treatment Plant (BVWTP).
10/12/2020 – 1,248.10 Kilolitres (KLs), 11/12/2020 – 1,792.43 KLs, 12/12/2020 – 9,369.72 KLs, 13/12/2020 – 14,989.98 KLs, 14/12/2020 – 16,277.23 KLs, 15/12/2020 – 13,977.51 KLs, 16/12/2020 – 9,529.95 KLs, 17/12/2020 – 12,228.33KLs.
Considering we have had the first substantial rain event since the work was completed, and average dry weather daily inflow is around 1,300 KLs, why is the STP recording these flows? How successful would councillors say the relining of the gravity mains has been?