Nullinga Dam Detailed Business Case



Project value



August 2018


Far North Qld



The Nullinga Dam and Mareeba Dimbulah Water Supply Scheme Improvements Project was proposed as a future water supply to serve growing agricultural demand in Mareeba and surrounding areas as well as future urban demand in Cairns. The project was designed to stimulate irrigated agriculture in the region by supplementing existing supplies from Tinaroo Falls Dam and utilise the existing Mareeba-Dimbulah Water Supply Scheme.

Bellwether was engaged to provide cost estimation services as part of a larger engineering, environmental and hydrology assessment to support the development of the Detailed Business Case (led by Building Queensland) for the Nullinga Dam.

What we delivered

Bellwether delivered high-level cost estimates for five preliminary design options for the future Nullinga Dam Project. This included a thorough review of job costs, a statistical analysis of risks using Montecarlo simulation and a thorough review of the construction program and staging.

“Bellwether’s estimate enabled the client to develop a Detailed Business Case for Nullinga Dam to take to the Queensland and Commonwealth Governments for consideration”

Key outcomes

Bellwether’s estimate enabled the client to develop a Detailed Business Case for Nullinga Dam to take to the Queensland and Commonwealth Governments for consideration. The business case recommended further analyzing improvements to the existing water supply scheme and, if a satisfactory level of demand was met, to further investigate the construction of Nullinga Dam.

Blythe River Bridge Strengthening
North Brisbane Bikeway – Chalk Street to Price Street
Captain Cook Highway Smithfield Bypass
Tinaroo Falls Dam Raising
Nullinga Dam Detailed Business Case
Stony Creek & Lindenow Options
Warrego Highway / Mt Crosby Road Interchange Upgrade
Fairbairn Dam
Maturing the Infrastructure Pipeline Program (MIPP)
Land Street Bikeway Underpass Duplication
Morayfield Indoor Sports and Events Centre Expansion
Torbanlea – Pialba Road Floodway Replacements Business Case
Samford Road Options Analysis
Logan Motorway East Bound Drainage Improvements and Pavement Rehabilitation
Gold Coast Tourism Hub Project – Bundall Road Site
Greenbank Transport Corridor
South Burnett Regional Council Systems Review
Cannon Hill Shopping Centre Bus Facility – Bus Station Upgrade
Newell Highway Flood Immunity West Wyalong to Forbes
Mareeba-Dimbulah Road Widening and Roadside Safety Improvements
Calliope River Bridge and Anabranch Bridge: Engineering Analysis and Options Analysis
North Pine Hub Strategic Assessment
Gregory Highway 27B – LN1 Culverts Upgrade Planning (Business Case)
Barwon Heads Road, Black Rock Road and Staceys Road Roundabout
Juliet Street Pavement Rehabilitation
NDRRA Flood Betterment Works – Merivale Street, Depot & Pidgeon Roads
Mackay Bus Stop DDA Compliance Program
Milton Street & Archibald Street Intersection Upgrade
Warland Street Drainage
Creek & Pipe Protection Works, Sunnybank
South Street & Burton Street Intersection
Whittle Street Drainage Upgrade
Capella Landfill Rehabilitation and Transfer Station Relocation Work
Springsure Landfill Rehabilitation
Leans Creek Bridge & Richardsons Bridge Repairs
Charleville Industrial Estate Stage 2
Caping Road Bridge
Virginia Park N’ Ride Upgrade
Gin Gin Streetscape Stage Two
Black Mountain Road Safety Improvements
Australian Department of Defence – Enoggera Barracks
Arrow Energy Dalby – Laydown Yard Upgrade
Toowoomba Waste Transfer Facilities
Pacific Highway Upgrade – Woolgoolga to Ballina
Easing Sydney’s Congestion – Pinch Point Program
Burdekin Falls Dam Improvement and Raising
M6 Early Works Construction
Warragamba Dam Expert Witness Report
South Batemans Bay Link Road
Gunns Gully Road Interchange
M1 Princes Motorway Improvements
Circular Quay Precinct Renewal
Wynnum Road Corridor Upgrade
Brookside Shopping Centre – Embankment Stabilisation