1. Upper Mississippi River - Illinois Waterway System Feasibility Study Extended Lock Design Concept

2. Lower End of Existing Lock Remove Stone as Required and Place Precast Floor Slab Outline of New Lower Gate Monolith Extension of the Existing Lock: General Layout Existing Guidewall Backed by Cellular Wall New Cellular Lockwall

3. Float-in Gate Monolith Z-Pile Cradle Key Plan Landing Pads Detail View of Float-in Lower Gate Monolith

4. Existing Lower Guidewall Sand Fill New Cellular Sheet Pile Wall Detail Cross Section of Lock Extension Concrete Between Guidewall and Cell Concrete Fill Graded Stone Filter Sand Concrete Floor Precast Concrete Panel Attached to Cells New Concrete Filled Cellular Lock Wall

5. New Cellular Sheet Pile Wall Detail View of Modification to Existing Guidewall Existing Lower Guidewall Concrete Between Guidewall and Cell Lock Floor Existing Timber Piles and Crib Sand Fill

6. Detail View of New Riverward Wall New Concrete Filled Cellular Lock Wall Precast Concrete Panel Attached to Cells New Cellular Sheet Pile Wall Lock Floor Concrete Fill

7. Detail View of Lock Floor Paved Concrete Floor Graded Stone Fill Sand