The 900 block of Randol Mill Road in front of Cowboys Stadium was closed for an hour or so Friday due to an unattended package call.
Officials from the Arlington Bomb Squad and HAZMAT teams arrived to investigate the device, but Arlington police said they found only trash and normal debris in the storm drain.
"There is no device ... other than routine trash that you'd get off the street, that's it," said Jim Self, Assistant Chief with the Arlington Fire Department. "We've been practicing this kind of response for several years now. It went very smoothly. This is a standard response and something we would have done anywhere in the city of Arlington."
The device, or what was thought to be a device, was reported to police by on-site security who said they saw someone dispose of something in the storm drain.
Police said they want to continue to encourage citizens to report things that they believe are suspicious.
The stadium and surrounding area were not evacuated during the investigation.
Cowboys Stadium is the site of Super Bowl XLV on Feb. 6.