Merrill Fire Chief Dave Savone abruptly retired on Wednesday. He had been on vacation for the past week, and yesterday turned in his letter of retirement, effective immediately. City Administrator Dave Johnson says the two of them have different management styles, and haven’t always agreed on how the fire department is run, or how its employees are treated. Johnson says an interim chief has stepped in, and the job is being advertised. He expects a new chief to be in place by this summer.