Northwest Pipe ( NWPX) rose after the company said it will supply about $23 million of welded steel pipe for the Tarrant Regional Water District's Eagle Mountain Connection Project. The district serves customers in north-central Texas. The company said it received a verbal agreement from Garney Construction of Kansas City, Mo., to supply about 48,300 feet of 84-inch diameter steel pipe. Deliveries are scheduled to begin in the fourth quarter. Shares of Northwest gained $2.77, or 11.2%, to $27.55. Radyne ( RADN) got some good news when the satellite-equipment maker learned that it will receive a $5.3 million order for modems and power amplifiers from a major military integrator. The company said it could receive an additional $60 million to $80 million in the next three to five years through the same program. In addition, Radyne was added to the Russell 3000 index. Shares of Radyne gained 36 cents, or 3.2%, to $11.54. America's Car-Mart ( CRMT) plummeted after the auto dealer missed Wall Street's fourth-quarter earnings expectations. The company earned $4.6 million, or 38 cents a share, compared with $4.3 million, or 36 cents share, a year ago. Revenue increased 13% to $62.5 million. Analysts were looking for a profit of 45 cents a share on revenue of $62.5 million. Same-store sales advanced 8.3% in the fourth quarter, compared with 12.6% a year ago. Looking ahead, the company said it expects revenue to grow from 10% to 14% in fiscal 2007, reflecting the planned addition of 12 new stores and revenue growth at existing stores. America's Car-Mart projected earnings of $1.56 to $1.63 a share, a 12% to 17% increase, for the year ending April 30, 2007. The stock dropped $2.17, or 10.9%, to $17.83. Deb Shops ( DEBS) slid after the apparel retailer said its June comp sales decreased 4.9%, and the company cut its forecast.