A proposed NFL stadium in Carson

A water truck sprays the dirt road on the proposed site of the new NFL stadium in Carson.  (Francine Orrm / Los Angeles Times)

Carson Mayor Jim Dear, Rep. Janice Hahn, Mayor Pro Tem Elito M. Santarina and City Councilwoman Lula Davis-Holmes at the news conference announcing the NFL stadium plan.  (Francine Orr / Los Angeles Times)

Raiders fans wave flags during the news conference announcing the Oakland-San Diego plan to build an NFL stadium in Carson.   (Francine Orr / Los Angeles Times)

The proposed site of the new NFL stadium near Del Amo Boulevard and South Main Street in Carson. Officials say cleanup efforts have made the site nearly shovel-ready for construction.  (Francine Orr / Los Angeles Times)

Rose Lehane, 6, left, hold up a sign while U.S. Rep. Janice Hahn (D-Los Angeles) waits to speak during a news conference officially announcing the plan for the San Diego Chargers and the Oakland Raiders to build an NFL stadium in Carson.  (Francine Orr / Los Angeles Times)