Iowa. Coralville Lake, 4 mi. N of Iowa City. We're looking to fill 3 spring/summer 2023 volunteer positions. We have 2 Custodian positions open for our Dam Complex and West Overlook Day-Use Area and 1 position for a Boat Ramp Volunteer. Contact Coralville Lake Project Office at: 319-338-3543 to apply and get more details. In exchange for hours, volunteers will receive a full-service campsite during their stay with us!