Little more than a proposed parking lot stands between negotiators for the city of West Sacramento and California State Parks. The two are close to an agreement for an $80 million California Indian Heritage Center on the banks of the Sacramento River. West Sacramento’s City Council heard a proposal from State Parks last month about building the center on a 43-acre site near the confluence of the American and Sacramento rivers. The center would house a museum and meeting space, and could be a major tourism draw. That has residents worried about parking and traffic. Some don’t want cars parked along their streets. Others don’t want the museum’s proposed two-story parking garage. State Parks is exploring parking alternatives, including using office building parking lots on weekends. The city will look at giving the land to California State Parks in a mid-June meeting.