The David C. Berti Shooting Range located in the Warren G. See South Spillway Recreation Area at Mark Twain Lake will be closed from dusk Thursday, April 14th until the morning of Monday, April 18th for visitor safety during the 1st Annual Salt River Pow Wow taking place during that time frame. Although the range will be closed during this time, the boat ramp will remain open for public use. If you need additional information, please contact the Mark Twain Lake Project Office at 573-735-4097 or email us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it .