(The Center Square) – As temperatures drop in Spokane, its homeless residents are struggling to find safe places to sleep despite the city’s new housing navigation center up and running. Mayor Lisa Brown proposed the housing navigation center earlier this year as the core of her scattered-site shelter model. The new center and model replace typical congregate shelter settings that can house up to hundreds of people daily but often under subpar living conditions. The Trent Resource and Assistance Center, or TRAC, closed on Halloween after serving as the city’s largest shelter for roughly two ye…