1. 3-Dimensional Views Existing spillway construction

2. 3-Dimensional Views First concrete pour inside spillway (summer 2013)

3. 3-Dimensional Views New concrete pier extensions (summer 2014) This work takes place “in the dry” behind a sheet pile cofferdam

4. 3-Dimensional Views Stoplogs are placed between piers & rest on new concrete sills Once stoplogs are in place water levels can be returned to normal

5. 3-Dimensional Views Construction work taking place between 2015 and 2016 More concrete is poured in the base of the spillway Existing gate and bridge are removed

6. 3-Dimensional Views Construction work taking place between 2015 and 2016 Concrete rollaway slabs and most of upstream barrel arches are removed

7. 3-Dimensional Views Construction work taking place between 2015 and 2016 New concrete crest is poured

8. 3-Dimensional Views Construction work taking place between 2015 and 2016 Concrete overlay is placed over entire pier structure

9. 3-Dimensional Views Construction work taking place between 2015 and 2016 New bridge is constructed

10. 3-Dimensional Views Tobacco Spillway to be completed in 2016 New gate is installed and stoplogs are removed

11. 3-Dimensional Comparison Existing spillway Modified spillway