Services

NRSBU is responsible for 16.8km of rising mains, 5 pump stations, and 688m outfall, a wastewater treatment plant and a biosolids application facility.  Indicative replacement costs as at 2017 are shown below.

NRSBU summary asset replacement costs

 

NRSBU summary asset replacement costs
Asset Description Gross replacement Value
Rising Mains $21,495,847
Pipes and Ponds $15,359,632
ATAD Plant $8,944,280
Outfall $4,113,391
Primary Clarifier $4,440,922
Inlet $3,529,668
Clarifier $3,444,959
Saxton P/S $2,962,959
Beach Road Reception Facility $440,115
Thickening $1,628,708
Beach Road P/S $2,393,350
Songer Street P/S $1,993,710
Road $2,247,416
Airport P/S $2,433,402
Aeration Equipment $1,418,086
Dissolved Air Flotation Plant $1,761,658
Biosolids Pipeline $899,685
Resource Consents $735,468
Rabbit Island Facility $983,087
Aeration Basin Civil Works $857,524
Buildings $582,644
Wakatu P/S $429,515
Facultative Equipment $447,766
Sludge Storage Tank $288,170
Biosolids Storage Tanks $143,363
Equipment $332,804
Biosolids Transfer Pumps $71,214
Valves $69,407
Biofilter- ATAD $230,817
Washwater $85,252
Supermatent Sump Pumps $77,616
TOTAL $84,832,436

Schematic of the system

A schematic view of how the Bells Island Sewerage Treatment Plant works.