Water Treatment Facilities

Pinellas County Utilities Water Blending Facility

Tarpon Springs, Florida

$80 million

2006

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Synergy performed structural engineering design of the 72 MGD water blending facility with a construction budget of $80 million dollars for Pinellas County Utilities. The purpose of the project was to improve the quality of water that Pinellas County receives from Tampa Bay Utilities and to replace the aging S. Keller pumping station. The structural scope of work included design of 4 major buildings, 3 minor structures, and pipe supports and restraints for all water lines that are to be located on the 50 acre site. The four major building included a 15,000 square foot administration building, the disinfection and stabilization chemical feed buildings which have a combined area of 31,500 square feet, and a 30,000 square foot,111 MGD capacity high service pump building. Minor structures include foundations and buildings for the 3400 square foot influent energy recovery turbines, a 3900 square foot parking garage, and 1700 square foot sodium hypochlorite storage building at the nearby H. Keller WTP which was also part of the water blending facility project. Design of these buildings includes foundations for the vertical and horizontal chemical storage tanks, pumps, generators and turbines as well as access ladders, stairs, platforms and railings. Design of a 20 ton bridge crane and railings was also included in the high service pump building. The structural design of pipe supports for nearly 1,200 linear feet of above grade water supply lines of various sizes ranging from 24” to 72” in diameter at the influent flow meter, chemical injection/mixer, and finished water trains was included in the scope. Additionally, underground pipe anchors were designed at the effluent manifold for the high service pump building as well as at the influent and effluent taps into the existing unrestrained 66”diameter water main. Structural design services were performed under the direction of the lead civil engineer Jones Edmunds & Associates in conjunction with the process engineer, Boyle Engineering, and project Architects, MRI .Construction is scheduled to commence in 2007 with CH2M Hill as the construction manager.    

North Booster Pump Station Expansion

Pinellas County Florida

$9,000,000

2002

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In order to maintain water system pressure in north Pinellas County, Synergy designed a 4600 square foot building addition to an existing water supply booster pump station. The addition housed a new injection pump, a booster pump, and future pump station. Since the floor elevation of the original building was 8 ½ feet below the ground water table, the addition had to be waterproofed and the structural design needed to account for hydraulic pressure and buoyancy. The foundation design included specification of soil improvements by chemical injection because very loose sands existed at the site.  These soils improvements were needed in order to mitigate differential settlement caused by vibrations from the pumps both at the pump house as well as at the nearby concrete water storage tanks. The structural design included the design of the pipe thrust restraints at the effluent manifold, the pump foundations, a 20 ton bridge crane, and a 2000 kW standby electric generator/switch gear room. Construction was completed in 2002 at a cost of $9,000,000 for Pinellas County Utilities. Synergy performed engineering services for Jones Edmunds & Associates.         

6.0 MGD Water Treatment Plant

Jacksonville Beach

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Synergy performed Structural engineering design of a new 6.0 million gallon per day water treatment facility in Jacksonville Beach, Florida.  The design included a new 1 million gallon cast-in-place concrete ground storage tank. The tank which holds 30 feet of standing water, is divided into two separate chambers. The chambers are baffled for chlorine mixing. The tan featured a patented self washing design in order to reduce deterioration of the roof slab from sulfur attack. The tank design included aluminum ladders, stairs, handrails, and platforms in addition to aerators, overflow vents, access hatches, and water level gages. The project also included new well heads, pumps and a new two story 3,000 square foot office/maintenance building. The maintenance facility was designed with load-bearing masonry walls supporting pre-cast concrete hollow-core planks on the second floor and steel decking and bar joists on the roof.  Also included in the facility was an overhead 10 ton gantry crane to facilitate  maintenance and moving the equipment placed in storage. The maintenance facility is not yet built.

Murphree WTP Filter Backwash Water Basin Rehabilitation

Gainesville, Florida

$150,000

2003

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Synergy performed design of the structural rehabilitations for the existing 180-foot diameter concrete filter backwash settlement water settlement basin for Gainesville Regional Utilities. The basin had numerous cracks which allowed for groundwater intrusion. Nearly 1400 linear feet of cracks in the basin were repaired by injecting with expanding polyurethane chemical grout. Approximately 650 square feet of spalled concrete were also repaired using epoxy mortar. Synergy was hired by GRU to monitor and track material quantities for construction pay requests. Additionally, GRU wished to add several equipment access penetrations and modify the monorails on an existing platform that was severely corroded. Synergy recommended that it would be less expensive to replace the aging platform with one constructed with corrosion resistant materials. By replacing the entire platform, the platform modifications were performed within the 3-4 day window in which the basin was normally empty, causing no disruption to plant operations. A cost study found that an epoxy painted steel platform with a fiberglass baffle and grating was the most cost effective approach over stainless steel and fiberglass platform options. Construction cost for the project was $150,000 when completed in 2003 by Intron.            

Hillsborough County Lift Station Flood Rehabilitation

Tampa FL

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Synergy performed structural design of the 800 square foot operations building with an 800 square foot covered area for equipment pumps, design of the emergency generator equipment pad, and design of the service equipment pads for the City of White Springs, Florida.  The funding of this project was with the State Revolving Loan Fund.  Also included in the scope of the project were two pre-engineered 25,000-gallon circular concrete storage tanks and a 150,000 gallon pre-engineered elevated storage tank. Construction was completed by WPC Industrial Contractors for 2.5 million dollars.  Synergy performed structural engineering services for Jones Edmunds and Darabi & Associates.  

Rockledge WWTP Clarifier Expansion

Rockledge, Florida

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Synergy Structural Engineering designed a pipe restraint structure to resist hydraulic pressure from unrestrained intersecting 36”diameter water mains which were to be tapped while remaining in service. The size of the concrete encasement of the restraint was limited due to the need to maintain access to the self tapping resilient seated valve. Because the lines would be pressurized prior to backfilling, restraint was achieved by mobilizing passive soil resistance through shear keys placed below a large mat foundation. The design also accounted for surface friction and bearing pressures to provide stability against sliding and overturning .Engineering services were performed under the direction of the project civil engineer, Jones Edmunds & Associates.

Steinhatchee WTP Expansion

Steinhatchee, Florida

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Synergy performed structural engineering design for a 0.7 million gallon per day plant expansion for the city of Steinhatchee in Taylor County, Florida.  The design included a 0.175 million-gallon circular pre-stressed concrete ground storage tank, 2,300 square foot operations building constructed with load-bearing masonry walls and pre-engineered wooden trusses, service pump foundations, two filter tank foundations, and backwash tank foundations.

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