For immediate release: March 13, 2003

MDA to Provide Land Information to Help with Flooding Problems in Texas

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA) announced today that the company’s Geographic Information Products group has been awarded a contract funded by Hidalgo County Drainage District No. 1 through S&B Infrastructure, Ltd. of Houston, Texas to produce three-dimensional land information of a 900 square mile area on the U.S. border with Mexico.

Hidalgo County, TX is one of the fastest growing counties in the United States, but rapid growth has also increased the amount of impervious surfaces in the region, causing a serious flooding potential. MDA’s work will support an overall drainage design being undertaken by S&B Infrastructure, Ltd., and other engineering firms of the Project Team, on behalf of the Hidalgo County Drainage District No. 1 to produce an effective new drainage system, coordinated with the US Army Corps of Engineers.

MDA will create three-dimensional images of the area using LiDAR, which uses narrow beams of light to create accurate and detailed topography information. The measurements will be developed to specifications set by the Federal Emergency Management Agency, (FEMA).

The S&B Infrastructure, Ltd. contract with MDA is valued at $714,000 (CDN).

Related Websites:
www.mdacorporation.com
www.sbgroupltd.com



For more information, please contact:

Ted Schellenberg
Media Relations
MacDonald Dettwiler
Telephone: (604) 231-2215
E-mail: teds@mda.ca