Broomfield, Colorado USA, August 24, 2005 - In its ongoing quest to equip the global wastewater industry with the world's most comprehensive and innovative GIS-centric modeling and design solutions, MWH Soft, a leading global provider of environmental and water resources applications software, today announced the worldwide availability of the V4 Generation of InfoSWMM for ArcGIS (ESRI, Redlands, CA). The release marks the most significant milestone to date in the evolution of the company's flagship urban drainage modeling product, firmly establishing it as the number one choice for the effective evaluation, management, rehabilitation and operation of wastewater and stormwater collection systems.

As a full-featured urban drainage network analysis and design program, InfoSWMM delivers the highest rate of return in the industry. All operations of a typical sewer system - from analysis and design to management functions such as water quality assessment, pollution prediction, urban flooding, real-time control and record keeping - are addressed in a single, fully integrated geoengineering environment. The program offers users unprecedented power in managing urban runoff and wet weather water quality problems in combined, sanitary and storm sewers; optimizing BMP and LID designs; and meeting SSO and CSO regulations. The model also offers highly sophisticated Real-Time Control (RTC) schemes for the operational management of wastewater systems and hydraulic structures. The unparalleled performance modeling of InfoSWMM sets new benchmarks in scalability, reliability, functionality and flexibility within the powerful ArcGIS environment.

Underlining MWH Soft's leadership in the wastewater industry, InfoSWMM reflects the company's ongoing commitment to delivering pioneering technology that raises the bar for urban drainage network modeling standards, helping to shape the future of this critical sector. Focused on expanded geospatial functions and performance, InfoSWMM V4 offers important cutting-edge GIS features and a wide array of enhancements that set an unprecedented standard for GIS-based modeling. These improvements greatly simplify, accelerate, and integrate urban drainage network engineering, helping wastewater engineers develop better designs and operational improvements faster and more efficiently.

Key additional tools include a Transect Extractor that uses advanced GIS technology to automatically create channel cross-sections from a DEM or contour elevation data by simply drawing a line on the map. Stations and elevations can be extracted at equal distances or at each change in slope. Another new feature, a Dry Weather Flow (DWF) Allocator, automatically and reliably computes and assigns wastewater loads generated by various customer categories. Wastewater loads can be calculated based on land use, population, or meter data, then allocated by customer type or merged into a single base flow. In addition, InfoSWMM 4.0 now supports an unlimited number of dry weather base flows, which can be managed and tracked by customer type (industrial, residential, etc.) at each junction. Different hourly, daily, monthly, and weekend patterns can be applied to each base flow at a junction, providing the ultimate flexibility for estimating sanitary loads throughout a long-term continuous simulation.

InfoSWMM is quickly becoming the must-have solution for comprehensive enterprise-wide geospatial urban drainage engineering. With an intuitive working environment and new cutting-edge features and improvements, V4 Generation delivers unmatched capabilities to the wastewater industry, backed by unparalleled technical support. "Just eight months ago, we introduced the world to InfoSWMM and set a new standard of excellence in urban drainage modeling and management software," said Paul F. Boulos, Ph.D, President and Chief Operating Officer of MWH Soft. "Now we're pleased to introduce another major evolutionary release that underscores our ongoing commitment to delivering superior value. InfoSWMM is not only the world's first and only urban drainage modeling solution certified by the National Association of GIS-Centric Software (NAGCS); its powerful hydraulic computational engine is also endorsed by the USEPA and certified by FEMA. We are proud to ship a significantly refined tool set that will have an immediate impact on our clients' productivity and performance."

"InfoSWMM V4 represents a significant leap forward," said Trent Schade, PE, Senior Client Service Manager and National Urban Drainage Technology Leader for MWH Soft. "Its direct integration with ArcGIS and its ability to simulate both dry-weather and wet-weather flows make analyzing even the most sophisticated and challenging urban drainage system fast and easy, regardless of users' technical expertise. This effectively extends its benefits across the entire enterprise."

Pricing and Availability
Upgrade to InfoSWMM V4 is now available worldwide by subscription to the Gold or Platinum Program. Subscription members can immediately download the new version free of charge directly from www.mwhsoft.com. The MWH Soft Subscription Program is a friendly customer support and software maintenance program that ensures the longevity and usefulness of MWH Soft products. It gives subscribers instant access to new functionality as it is developed, along with automatic software updates and upgrades. For the latest information on the MWH Soft Subscription Program, visit www.mwhsoft.com or contact your local MWH Soft Certified Representative.

About MWH Soft
MWH Soft is a leading global provider of technical and infrastructure software and professional solutions designed to meet the technological needs of utilities, government industries, and engineering organizations worldwide. Its clients include the majority of the largest North American cities and ENR top design firms. The multifaceted, state-of-the-art CAD and GIS enabled products created by MWH Soft, empower thousands of engineers across the globe to competitively manage, design, and operate highly efficient and reliable infrastructure systems. For more information, call MWH Soft at (626) 568-6868, or visit www.mwhsoft.com.