A plan to restore water to a dry pond at the Vistoso Trails Nature Preserve is facing pushback from a conservation group, raising concerns about environmental safety and the risk of legal action.The Town of Oro Valley is looking to restore the pond once part of the former Vistoso Golf Course using reclaimed water. But Archaeology Southwest says that approach could violate protections tied to the land.In a formal 60-day notice to the town, the gr…