Mark Twain Lake, April 5, 2021 - The U.S. Army Corps of Engineers (USACE) announces the closure of the North Spillway, South Spillway, and Overlook from 3:00 P.M, April 13, 2021 through 7:00 AM., April 15, 2021. This closure includes the shooting range, disk golf course, boat ramp, shelter houses, and bathrooms. Mark Twain Lake will be hosting the Air Force National Guard as they complete a COVID-19 Vaccination Clinic to provide vaccinations to approximately 1,200 participants. This is not an open event, all participants receiving the vaccination have a standing appointment with a scheduled time slot.