From left to right: Dallas City Manager Mary Suhm, Trinity Trust president and CEO Gail Thomas, Southwest Airlines president and CEO Gary Kelly, Southwest Airlines vice president of communication and strategic outreach Linda Rutherford, Southwest Airlines senior vice president of culture and communication Ginger Hardage

About 200 Southwest Airlines employees volunteered down at the Santa Fe Trestle Trail Park Friday to kick off the carrier’s three-year, $150,000 commitment to improve the Trinity River corridor.

The six-figure grant helped to form the Trinity Conservation Corps, a partnership between Southwest, the city and Groundwork Dallas, with a mission to clean and conserve the corridor. The corps will organize volunteer efforts over the next three years.

The group from Southwest Airlines Friday planted 400 grass plants and 100 native blooming plants provided by the Lewisville Aquatic Ecosystem Research Facility.