The latest analysis of Portland’s options for a new homeless shelter lists over 30 possible sites, including some near the waterfront, as well as the possibility of multiple facilities and partnerships with local nonprofits.

City officials are expected to suggest a new service model, including two smaller specialty facilities in addition to a central emergency shelter. The structure could include partnerships with Avesta Housing and the Opportunity Alliance to operate smaller treatment centers for people with mental health problems and for people 55 or older with medical issues — populations that city staff does not have the expertise to help, said City Manager Jon Jennings. That would allow the city to build a 150-person homeless services center somewhere in the city, he said.