Winner
Roy Hill Iron Ore - Roy Hill Water Supply and Dewatering Network
The Roy Hill Iron Ore mine development project in Western Australia includes water supply and dewatering operations that cover a 300-square-kilometer area. Roy Hill plans to reduce costs over the 20-year life of the mine by optimizing design and operation of the integrated water network. This AUD 500 million project has already saved more than AUD 1.75 million within the first two years of operation.

A WaterGEMS hydraulic model informs all planning and design decisions. By modeling current and future scenarios, Roy Hill optimizes pipeline sizes, pressure ratings, bore pump operations, and other factors. In one case, reducing operating pressure allowed the use of pipes with smaller PN (nominal pressure) numbers, contributing to savings of AUD 1.6 million within two years. Over the life of the project, Roy Hill expects savings in capital and operating expenditures to total AUD 38 million.

Finalist
Sabesp - Modeling in Crisis
Sabesp provides basic sanitation services to more than half of the 645 municipalities in the state of São Paulo, Brazil. When a 16-month drought caused record low inflow to the Metropolitan Region of São Paulo, Sabesp was challenged to adequately supply the 20 million inhabitants with water under severe restrictions and challenging weather conditions. Rather than impose an intermittent supply of water to customers only two days per week, Sabesp optimized its interlinked metropolitan integrated system (SIM) with the help of hydraulic modeling.

This BRL 150 million project utilizes hydraulic modeling in WaterGEMS to assess the best possible scenario to transport drinking water to the affected areas, reduce overall consumption, reduce water loss including the identification of leakages, and increase the pressure of the flow. It also helped to supply water during a period of drought in 2014 and 2015. In the WaterGEMS model which was integrated with their existing GIS, 80 scenarios were created and managed. They estimated the final time savings on the whole process to be 50 percent once they had delivered the SIM network.

Finalist
NJS Engineers India Pvt., Ltd. - JICA Assisted Ganga Action Plan
Located on the Ganga River, the ancient city of Varanasi discharges 67 percent of its sewerage into the river and its tributary. Uttar Pradesh Jal Nigam, the government corporation responsible for water supply and sewerage services in the state of Uttar Pradesh, India, retained NJS Engineers India to participate in an INR 4.96 billion project to construct new and rehabilitate existing sewerage treatment facilities in Varanasi to improve the quality of sanitation and to boost tourism as a result.

NJS Engineers India developed the rehabilitation and improvement plan, and performed design review, construction supervision, and operations planning. Bentley’s interoperable software supported tasks including GIS database update, sewerage zone development, sewerage network update, wastewater asset inventory, and existing and proposed system modeling. SewerGEMS was instrumental in the analysis of the 800-kilometer sewer network. Bentley technology saved INR 5 million during design and INR 10 million during construction.