The Olmsted Locks and Dams project project consists of twin 110-foot wide by 1,200 foot long lock chambers located at Olmsted, Illinois, on the Ohio River. The lock chambers are constructed from heavy precast concrete units, that will be cast in a yard on the shore and then handled on land using a purpose made 'super gantry' and in the water using a purpose made heavy lift catamaran barge crane. DLT were awarded the contract to design, supply and operate 2 No 12,000 tonne capacity computer controlled strand jack systems for use as the main lifting systems on both the super gantry and the catamaran barge crane. Delivery of these systems took place in early 2010 for use on site in the summer working seasons of 2010-2015. The first concrete unit was placed on the river bed on 21st August 2010, as shown in the video below. Also see Also see ENR online article»