Effective January 07, 2013, there will be a change to the scheduled daily maintenance closures at Ozark-Jeta Taylor Lock and Dam (No. 12) NM 256.8, James W. Trimble Lock and Dam (No. 13) NM 292.8, Webber Falls Lock and Dam (No. 16) NM 366.6, Chouteau Lock and Dam (No. 17) NM 401.4, and Newt Graham Lock and Dam (No. 18) NM 421.6.