Wastewater Facilities

Cross City Water Treatment Plant’s Expansion

Cross City Florida

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Synergy performed engineering design of a 1.2 to 2.0 million gallon per day plant expansion in Dixie County, Florida.  The expansion included an elevated concrete support structure for the raw-water flow split aerator, ground level concrete support structures for two reactor clarifiers, site retaining walls, a concrete ground level support structure for a sludge thickener, a 17,000 gallon concrete backwash transfer tank, a 65,000 gallon enclosed concrete filter/clearwell holding tank, aluminum stairwells, handrails, and catwalks for the tanks, and an 800 square foot operations building with a 800 square foot covered area for equipment pumps.  Also included in the scope of the project were two pre-engineered circular concrete storage tanks, one a 500 thousand-gallon ground storage tank and the other a 160 thousand-gallon ground storage tank.

On Top of the World WWTP Expansion

Clearwater, Florida

$6,500,000

2008

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Synergy Structural engineering performed structural design of a 0.45 to 0.60 MGD plant expansion in Clearwater, Florida. The expansion included an 80,000 gallon concrete disinfection chlorine contact basin, an elevated concrete support structure for influent screen and flow box splitter, two 94,000 gallon steel secondary clarifier tanks, one 450,000 gallon steel reject storage tank, a 600 square foot operations building, concrete ground level support structures for a bulk storage tank/aeration blowers/mixer liquor return pumping station, concrete pipe supports, and aluminum stairs, handrails, and catwalks for the tanks. Also included in the scope of the project were six circular pre-cast manholes, three circular precast wet well pump stations, a 200 square foot chlorination building, a digested sludge transfer pumping and truck loading system, and modifications to an equalization basin. Due to poor site soil conditions, all of the major structure foundations were designed to be supported on 12” diameter auger cast piles. Construction of the expansion has begun and is scheduled to be completed in 2008 for a cost of $6,500,000.

White Springs WWTP Expansion

White Springs, Florida

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Synergy performed structural design of a water treatment plant with a 700 square foot operations building and 3,800 square feet of sludge drying beds for White Springs, Florida. Included in the scope of the project was a pre-engineered 150,000 gallon concrete wastewater tank. The single-story operations building was built with load-bearing masonry walls on a conventional shallow foundation system supporting pre-cast hollow core concrete planks at the roof.  The exterior walls of the sludge drying beds were constructed of masonry supported by conventional shallow foundations and rose to 2’-8” above the level of the granular filter beds.

Sludge Filter Press Addition-Fernandina Beach WWTP

Fernandina Beach, Florida

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Structural design of a two-story theater building and entry portico with an attached 3-story office and classroom building. Included in the theater building is a trap room and orchestra pit at the basement level and 510 seats for the first floor audience in front of the stage.  The 2nd floor balcony includes seats of 263 for the theatre including the side boxes.  The theatre’s fly tower has an elevated fly gallery and a gridiron support level.  Also included in the theatre is the upper level catwalk.  The 3-story office/classroom building has 161 seat film studios, classrooms, and support staff on the first floor; offices on the 2nd floor; and office’s and mechanical rooms on the third floor.   A single story television production studio, film sound stage, classrooms, and supporting rooms with a mechanical mezzanine were included in the design and are separated from the theatre building by an expansion joint.  The buildings were supported with shallow foundations supporting load-bearing masonry walls and structural steel columns placed within the partition walls.  The elevated floors were constructed with cast-in-place concrete above composite steel deck and composite steel beams.  The main roof was sloped at 8:12 and was constructed with steel bar joist framing and structural steel beams supporting a steel roof deck.  For fire and sound isolation from the remaining building, the theatre also had a flat concrete roof deck supported by long span joists below the exposed roof framing.  The adjacent single story building that was separated by the expansion joint was constructed with load bearing masonry walls supporting bar joists and roof deck.  The roof of the television production studio and film sound stage of the single story building was construed flat with concrete above metal deck and steel bar joists.

Hillsborough County Lift Station Flood Rehabilitation

Tampa FL

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Synergy performed structural modifications for a dozen lift stations which were located below flood elevation as part of Hillsborough County’s hurricane preparedness improvements. Lift station modifications were prescribed by the project civil engineer, Jones Edmunds & Associates which included raising finished grade of some of these sites by as much as six feet. The structural scope performed by Synergy included design of services pads, pipe supports, extensions of existing wet wells and valve vaults, aluminum service platforms and handrails, manway hatches, access roadways, highway guardrails, and perimeter wood fencing.

Rockledge WWTP Clarifier Expansion

Rockledge, Florida

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Synergy performed structural design of additions and modifications to the treatment plant in Rockledge, Florida to increase the effluent capacity from 2.2 million gallons per day to 4.4 million gallons per day.  The work included design of a forty-one thousand gallon tertiary filter tank to process an additional 1 million gallons per day and modifications to an existing tertiary filter tank by adding new platforms, handrails, and filters.

Lift Station No. 6 & 7 Rehabilitation

Bradenton, Florida

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Synergy performed the structural engineering design to retrofit Lift Station No. 6 & 7 for the City of Bradenton, Florida.  The lift station designs included adding cast-in-place slabs to cover the existing wet wells of the stations.  New pumps and access ladders were added to bring the stations up to date.  The estimated construction and demolition budget is $2.5 million and was completed in the middle of March 2006.  The project is expected to save the City of Bradenton $600,000.

Selected Project Experience