A family of beavers popular among Martinez children and nature lovers should be killed and its dam torn out of a downtown creek to prevent flooding, city administrators have concluded. The fate of the beavers in Alhambra Creek goes to the City Council at its meeting 7 p.m. Wednesday at Martinez City Hall. Supporters of the beavers are aghast, saying the two adult beavers and three or four offspring have become a symbol of nature living near people. "I think it's a horrible idea," said Heidi Perryman, a child psychologist who lives downtown. "You have second-graders making field trips to...