CHATFIELD STATE PARK, Colo. (CBS4) - A search and recovery operation resumed at Chatfield State Park early Saturday morning. Colorado Parks and Wildlife sent a Marine Evidence Recovery Team out at 2 a.m.

CPW, West Metro Fire and South Metro Fire responded to the swim beach on Friday afternoon for an adult who did not resurface from the water. Witnesses on a nearby boat tell crews they saw two people struggling to swim.

They were able to rescue one of them.

Crews used sonar equipment to search the last point where the missing person was seen.

Storms and wind on Friday capsized a rescue boat, but everyone was able to be rescued by other rescue crews.

Crews declared the missing a recovery instead of a rescue two hours after searching for the adult.

RELATED: 'Don't Get In The Water': Blue Green Algae Closes Swim Area At Cherry Creek State Park