When police officers in Grass Valley broadcasted a series of “1010” calls across their radios Thursday morning, indicating they were no longer in service, it didn’t sound that uncommon — until the dispatcher who coordinates that communication also signed off. With dispatcher Trisha Bush’s last broadcast, Grass Valley’s police department shut down its internal dispatch at 7 a.m. Thursday to outsource the service to the Nevada County Sheriff’s Office. As the sheriff’s office in Nevada City took over the dispatch from Grass Valley, it meant that all of Nevada County’s local law enforcement had consolidated dispatching under one roof — …