I just walked over there - looks like a box spring - double or queen size.

Thank you for reporting! Public Works has one full-time Maintenance worker whose sole job is to respond to illegal dumping reports throughout the City. This person usually makes 2 or more trips to the dump everyday, with each load weighing in around 1,200 pounds. We strive to respond to all reports in a timely fashion. If you see someone dumping illegally please report the incident to the Vallejo Police Department.

Thanks for reporting! Our staff responsible for removing, sorting, and dumping all illegal dumping in Vallejo has picked up the illegal dumping reported at this location. If you have any questions or concerns regarding this issue, please call the Grounds Supervisor at 707-648-4581. Thanks again for using SeeClickFix!

I saw that the mattress was gone - thanks so much for taking care of this.