Innovative Darwin Calibrator Now Offers Engineers and GIS Professionals Pioneering and
Cost-Effective Way to Identify Location and Extent of Underground Water Leakage

EXTON, Pa. – Aug. 5, 2008 – Bentley Systems, Incorporated today announced that the Bentley and United Utilities PLC collaborative project “Optimization Method and Modeling Tool for Leakage Detection in Water Distribution” has won the Honor Award for Applied Research in the International Water Association (IWA) Project Innovation Award 2008 competition for the European region. The IWA Project Innovation Awards recognize excellence and innovation in water engineering projects around the world. The focus of the Bentley and United Utilities award-winning project was the development of an innovative optimization methodology and modeling tool for detecting unreported leakages in water distribution systems – a problem that results in the annual loss of more 20 percent of potable water by water utilities worldwide. The new version of the Darwin Calibrator modeling tool automates the new methodology, providing engineers and GIS professionals in water utilities and municipalities with a pioneering and cost-effective way to identify the location and extent of underground water leakage.

Commenting on the capabilities of the new Darwin Calibrator, Dr. Zheng Yi Wu, Bentley director of Applied Research in Engineering Optimization, said, “The enhancement to this innovative optimization tool solves a long-standing problem for the water industry. It enables cost-effective water-loss reduction strategies and facilitates the creation of accurate hydraulic models by undertaking both leakage detection and hydraulic model calibration. Therefore, the software module maximizes water utilities’ investments in hydraulic modeling technology.” The new Darwin Calibrator is included in the latest version of Bentley’s WaterGEMS V8 XM and is available for Bentley’s WaterCAD V8 XM.

Having won in the European region, Bentley and United Utilities will now submit the project to IWA’s global awards program, in which they will compete with winners from East Asia, the Pacific, and North America. The winners of the IWA Project Innovation Award Program for Excellence in Innovative Water Engineering will be announced during the IWA World Water Congress in Vienna, Austria, Sept. 8-11, 2008.

For more information about Bentley’s new Darwin Calibrator modeling tool, visit www.bentley.com/waterloss08.

About United Utilities Water

United Utilities Water PLC owns and operates the water network in North West England. The company supplies 2,000 million liters of water every day via a network of around 40,000 kilometers of water mains, 1,444 kilometers of aqueduct, and more than 100 water treatment works.

It covers a population approaching seven million people and 2.9 million households and business premises. The business is also a provider of water and wastewater services to more than 400 industrial and commercial enterprises. For more information about United Utilities, visit www.unitedutilities.com.

About Bentley Systems, Incorporated

Bentley is the global leader dedicated to providing comprehensive software solutions for sustaining infrastructure. Architects, engineers, constructors, and owner-operators are indispensable in improving our world and our quality of life; the company’s mission is to improve the performance of their projects and of the assets they design, build, and operate. Bentley sustains the infrastructure professions by helping to leverage information technology, learning, best practices, and global collaboration – and by promoting careers devoted to this crucial work.

Founded in 1984, Bentley has more than 2,800 colleagues, offices in more than 50 countries, annual revenues surpassing $500 million, and since 1993, has invested more than $1 billion in research, development, and acquisitions. Nearly 90 percent of the Engineering News-Record Top Design Firms are Bentley subscribers, and a 2008 Daratech study ranked Bentley as the world’s #2 provider of geospatial software solutions. For more information about Bentley, visit www.bentley.com.

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