Debbie Watkins is tired of seeing scattered pop cans, beer bottles, plastic cup lids, pine needles and bags of leaves littering the side of La Barr Meadows and Dog Bar roads on her way to work at Grass Valley City Hall.She's complained to numerous Nevada County officials about the debris since March, but they said they only can do a limited amount of work because roadway maintenance takes precedence.A three- to four-mile stretch of the two connecting roads just outside of Grass Valley's city limits is an eyesore, said Watkins, who lives in Alta Sierra. Watkins works as an administrative …