Metro construction: July 2003

Quick reference
— Ammonia removal facilities (BAF)
— Phosphorus removal facilities (HRFS)
— Ultraviolet disinfection
— Secondary effluent pump station (SEPS)
— Additional projects

Ammonia removal facilities (BAF)

Setting precast concrete columns in the southeast BAF gallery Swinging precast concrete beams to the southeast BAF gallery

Setting precast concrete planks over the southeast BAF gallery

Setting precast concrete planks over the southeast BAF gallery

Planking in place atop the southeast BAF gallery Looking southeast at the roof over the BAF

Forming the North BAF drop boxes

Forming the North BAF drop boxes

Formed for the South BAF wedge wall

Formed for the South BAF wedge wall

Pouring concrete for the influent channel of the North BAF

Pouring concrete for the influent channel of the North BAF

Looking northwest at the BAF complex at the end of July 2003

Looking northwest at the BAF complex at the end of July 2003

Installing roof insulation at the BAF utility building Power feeds into the BAF utility building

Phosphorus removal facilities (HRFS)

Working on the concrete slab for the HRFS maturation tank #4

Working on the concrete slab for the HRFS maturation tank #4

Concrete slab for the deck of the HRFS north gallery

Concrete slab for the deck of the HRFS north gallery

Building the concrete forms for the effluent channel of the HRFS

Building the concrete forms for the effluent channel of the HRFS

Installing scaffolding for the slab on deck of the HRFS North Gallery

Installing scaffolding for the slab on deck of the HRFS North Gallery

Pouring the north part of the HRFS influent channel

Pouring the north part of the HRFS influent channel

Pouring the upper lift of HRFS tank #1

Pouring the upper lift of HRFS tank #1

Decking over the HRFS influent channel

Decking over the HRFS influent channel

Installing reinforcing steel bars in the influent channel

Installing reinforcing steel bars in the influent channel

14-inch sludge line for the HRFS

14-inch sludge line for the HRFS

Looking northeast toward the HRFS complex

Looking northeast toward the HRFS complex

Ultraviolet disinfection

CMU work along the south wall of the UV facility

CMU work along the south wall of the UV facility

Secondary effluent pump station (SEPS)

Flying in one of the 500-hp pump at the SEPS The last 500-hp pump is set in place

Construction of the south wall of the pump room Temporary bypass piping for the SEPS

Additional projects

Using a plate tamper for backfilling the conduit crossings by the secondary clarifiers

Using a plate tamper for backfilling the conduit crossings by the secondary clarifiers

New switch gear added to the substation

New switch gear added to the substation

Excavation begins for the new operations building

Excavation begins for the new operations building

Forming the grade beams at the operations building

Forming the grade beams at the operations building