3-Dimensional ViewsExisting spillway construction

3-Dimensional ViewsFirst concrete pour inside spillway (summer 2013)

3-Dimensional ViewsNew concrete pier extensions (summer 2014)

This work takes place “in the dry” behind a sheet pile cofferdam

3-Dimensional ViewsStoplogs are placed between piers & rest on new concrete sills

Once stoplogs are in place water levels can be returned to normal

3-Dimensional ViewsConstruction work taking place between 2015 and 2016

More concrete is poured in the

base of the spillway

Existing gate and bridge are removed

3-Dimensional ViewsConstruction work taking place between 2015 and 2016

Concrete rollaway slabs and most of upstream barrel arches are removed

3-Dimensional ViewsConstruction work taking place between 2015 and 2016

New concrete crest is poured

3-Dimensional ViewsConstruction work taking place between 2015 and 2016

Concrete overlay is placed over entire pier structure

3-Dimensional ViewsConstruction work taking place between 2015 and 2016

New bridge is constructed

3-Dimensional ViewsTobacco Spillway to be completed in 2016

New gate is installed and stoplogs are removed

3-Dimensional Comparison

Existing spillway Modified spillway