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3-Dimensional Views. Existing spillway construction. 3-Dimensional Views. First concrete pour inside spillway (summer 2013). 3-Dimensional Views. New concrete pier extensions (summer 2014). This work takes place “in the dry” behind a sheet pile cofferdam. 3-Dimensional Views.
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3-Dimensional Views Existing spillway construction
3-Dimensional Views First concrete pour inside spillway (summer 2013)
3-Dimensional Views New concrete pier extensions (summer 2014) This work takes place “in the dry” behind a sheet pile cofferdam
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
3-Dimensional Views Construction work taking place between 2015 and 2016 Existing gate and bridge are removed More concrete is poured in the base of the spillway
3-Dimensional Views Construction work taking place between 2015 and 2016 Concrete rollaway slabs and most of upstream barrel arches are removed
3-Dimensional Views Construction work taking place between 2015 and 2016 New concrete crest is poured
3-Dimensional Views Construction work taking place between 2015 and 2016 Concrete overlay is placed over entire pier structure
3-Dimensional Views Construction work taking place between 2015 and 2016 New bridge is constructed
3-Dimensional Views Tobacco Spillway to be completed in 2016 New gate is installed and stoplogs are removed
3-Dimensional Comparison Existing spillway Modified spillway