Officials in South Ogden, Washington Terrace and Riverdale want to know if consolidating their fire departments is the way to go. Officials have been weighing and informally discussing the idea for about a year, particularly in South Ogden and Riverdale, and now a consultant will launch a study to delve deeper into the notion. The study, to be carried out by Salt Lake City-based Zions Public Finance, has a price tag of $16,500, to be split between South Ogden and Riverdale, and the notion of consolidating ambulance services will also figure in the review.