Just before Midnight, Sussex EOC alerted Station 85 along with Ellendale (75), Lewes (82) and Memorial (89) for a residential structure fire on Rosemary St. in Primehook Beach. Asst. Chief Millman (85-17) arrived to find nothing evident with a reported odor of smoke in the residence. 85-8 arrived began an evaluation of the interior of the structure. Engine 85-3 arrived as the first due engine and assisted Deputy 85 with investigating the interior. Engine 75-3 arrived as the second due engine and investigated the crawl space under the home. Crews found no smoke or fire throughout the residence. Asst. Chief Millman placed the scene under control and returned all units when ready. Units responding, E-3, ET-2, E-75, T-75, ET-75, ET-89, T-89, E-82, 85-8, 89-8, A-85, B-89, 85-17, DSFP