Modular

Tucson, Arizona – February 20, 2004

Gold Fields Ghana Ltd. has selected Modular Mining's IntelliMine^® mine management system to improve productivity at its Tarkwa Gold mine. Tarkwa, a world-class open pit mining operation in West Africa, is located in south central Ghana, approximately 300 km west of Accra, the capital, and 100 km north of the port city Takoradi.

The IntelliMine^® system selected by Tarkwa, which includes the DISPATCH^®, MasterLink^®, PowerView™, and MineCare^® systems, will provide the following key benefits to the mine:

Field proven system with optimization algorithm for productivity improvements
802.11 compliant communications
Ability to expand the network as needed
Advanced interfaces with OEM vehicle health monitoring
ODBC compliant database for reporting
Monitor equipment allocations from selective mining faces using handheld PDAs
Optimized equipment fleet assignments
Verify and monitor key operational parameters, such as TKPH, to enable real-time decision making

Additionally, Tarkwa can capitalize on Modular's experienced regional technical support, which is offered 24 hours a day, seven days a week (24/7). Modular support staff can easily 'dial in' to the system, diagnose, and trouble shoot to determine the best solution—providing Tarkwa with added value to keep its system at optimal performance.

"This is a very exciting project for us," stated Mike Jackson, General Manager for Modular Africa. "Tarkwa will be deploying a state-of-the-art mine management system second-to-none in the African region. With a full spectrum of IntelliMine^® products, Modular is pleased to be involved with such a world-class operation."

Tarkwa is in the process of changing from contract mining to owner mining. As part of this project, they plan to utilize the system throughout its operations on a variety of equipment including: 24 trucks (145 ton), 10 loaders, 9 dozers, 5 graders, and 6 pieces of auxiliary equipment. Additionally, 19 MasterLink^® access nodes will be installed and two foreman vehicles will be equipped with ruggedized laptops that include IntelliMine^® and MasterLink^® utilities for controlling and monitoring the operation, as well as browser and corporate client/server application. Site configuration has already begun. Start-up is anticipated for July.

About Tarkwa Gold Fields Ltd.:

Gold Fields (JSE: GFI - NYSE: GSI) is one of the world's largest precious metals producers with annual attributable gold production of more than 4.3 million ounces of gold and attributable mineral reserves of 81.5 million ounces. The Tarkwa mine, originally an underground operation, began surface mining in 1998. Underground operations were suspended mid-1999. Expected mine life is approximately 15 years and total reserves are estimated at 232 million tons as of June 2003. Production at Tarkwa amounted to 0.54 million ounces for 2003. A new CIL plant is under construction with start-up planned for the second half of 2004. Total tons mined is expected to increase to over 70 million, while tons treated will rise to 19.2 million per annum.

About Modular Mining Systems, Inc.

Modular, headquartered in Tucson, Arizona, is the market share leader in providing powerful information management solutions to meet the needs of both open pit and underground mining operations worldwide. The company's products range from fully automated, total mine management and control systems using the latest high-precision global positioning systems for surface applications, to proven mining cycle control, monitoring, and identification systems for underground mines. Modular has sales and support offices located in all key world-mining markets. For more information on Modular, the IntelliMine^® system, or the company's new, revolutionary systems for rail management and equipment automation, visit the Modular website at http://www.modularmining.com.

Email: products@mmsi.com

Phone: 520.746.9127