Missoula County in Montana serves a population of more than 100,000 people. It operates a detention facility and sheriff and transportation departments. The county s human resources department provides resource management and training services. Its health department offers immunization, disease control and breast-feeding support solutions, as well as prenatal classes. The county s planning and grants office provides program development and implementation services and operates historic preservation and administration divisions. It maintains Missoula Art Museum, which conducts several exhibitions. The county s emergency services office prepares and manages disaster preparedness, response and recovery plans and programs. Missoula County in Montana also maintains an information systems department that provides data processing services.