Lithia WTP Additional Pumping and Emergency Generator
Metzger + Willard, Inc. (MWI) contracted with Mustang Tampa, Inc. as a team partner to assist with design and construction services for the Lithia WTP Pumping, Storage and Emergency Generator Project. The project provides for an increase in potable water pumping capacity and reliability in the South-Central Service Area of Hillsborough County including increasing the pumping capacity by 25 million gallons per day (MGD) to a total flowrate of 92.2 MGD and expanding the availability of emergency diesel-generator power. The project also includes adding an additional 5.0 MG ground storage reservoir to increase the facility’s total storage capacity.
MWI responsibilities for the project included design of the 5.0 MG storage tank, all yard piping, valving and tank connections; survey; the civil site design including paving, grading and drainage; all permitting; resident inspection; and construction phase services support. Permits required for the facility included SWFWMD ERP Modification, Hillsborough County Planning and Growth Management Site development permits, FDEP Modification of a Drinking Water Facility, FDEP Construction of a Fuel Storage Tank, and a Gopher Tortoise Relocation Permit from the Florida Fish and Wildlife Commission. The FDEP permit for modification of a drinking water facility included application to rerate the facility capacity.
City of Groveland WTP No. 5
MWI recently evaluated the hydraulic sufficiency of the existing water transmission and distribution system for the City of Groveland. This work included reviewing proposed capital improvement projects, and conducting computer modeling simulations to review existing and future conditions. From evaluation of node pressure data, MWI made recommendations for system improvements including increasing transmission main capacity and increasing supply and pumping capacity. Recommendations included siting a new water treatment facility storage tank and well along SR 50. The new water treatment plant has been designated as WTP No. 5.
MWI is currently conducting final design and permitting for the facility including two 800 ft deep, 750 gallon per minute potable wells; 0.75 MG prestressed concrete groundwater storage tank; water treatment process equipment for disinfection and stabilization; three- high-service pumps with variable frequency drives; and emergency generator and associated equipment. The WTP capacity is 1.7 MGD. MWI is being assisted by hydrogeological subconsutant, Andreyev Engineering, Inc.
South Central Water Transmission Main
MWI recently completed surveying, performing a route study and performing preliminary design for the South Central (potable) Water Transmission Main, near Brandon, in eastern Hillsborough County, Florida. The potable water transmission main will connect the Central Hillsborough Water Treatment Facility to the County’s North Brandon potable water distribution system. The length of the route is approximately 22,000 feet (14,000 feet of 42-inch diameter and 8,000 feet of 30-inch diameter).
As part of the project Metzger + Willard, Inc., identified infrastructure within the corridor including, but not limited to utilities, roadway, sidewalks, and substantial vegetation such as trees, assessed easement/ROW considerations, identified Home Owner Association(s) impacted by the proposed transmission main path, identified regulatory concerns or requirements (including wetlands, contaminated sites, etc.) identified permits required for construction, and evaluated geotechnical conditions. The final work products prepared for this contract included a Route Study, Basis of Design Report and 30% Construction Drawings.
MWI has been selected to provide final design and construction phase services for this project.
OUA WWTP Expansion – Design
The OUA contracted with Metzger + Willard, Inc. to expand their existing WWTP and Effluent Disposal System to 3.0 MGD. The expansion includes incorporating existing facilities into the treatment train. New components include headworks with screening, grit removal and flow metering; master pump station; an anaerobic basin for phosphorus removal; a new aeration basin using the ORBAL oxidation ditch process; an anoxic zone/re-aeration basin for nitrogen reduction; automatic backwash filters; and disinfection capacity. The project also includes a new residuals management facility using a centrifuge for dewatering and a solar drying system for processing. The work also includes the expansion of the on-site effluent disposal system. Services included the development of an extensive preliminary engineering report. Construction cost is estimated at $23,000,000.
Nature’s Way Pump Station Expansion
Hillsborough County Water Resource Services contracted with MWI to upgrade and expand an existing station as a replacement for one in a residential area which was to be abandoned. The replacement station was also needed for expansion of the collection and transmission system in a rapid growth area of the County. The station, as designed, is the second largest in the County’s system, with a capacity of 9 MGD. Key components of the station included two 12-feet diameter wet wells and six new 150 HP submersible pumps. In addition, the project included a new odor control system, a new generator and electrical building, plus approximately 1,500 feet of 16, 18 and 24 inch sanitary force main with a connection to an existing system. Because of the heavy flows to the station and very little existing storage capacity, the station had to be expanded without any interruption in flow. Phasing and relocation of existing equipment was very critical. Also as part of the project, a corrosion study was made on an existing force main. Services included conducting a preliminary design and engineering of alternates for expansion, and for design and permitting. In addition, MWI provided construction phase and start up services.
Miller Mac Pump Station Additions
MWI provided design, permitting, bidding and construction services for an addition to the main pump station in Apollo Beach, including new wetwell, pumps, electrical, and controls. Work also included rehabilitation of the existing station.
The project includes a new electrical building and emergency generator with automatic transfer switch. Work also includes a new odor control system. Two existing lift stations will be converted to manholes and a new gravity system will be constructed to connect existing subdivisions to the Miller Mac Pump Station.
The existing pump station consists of two 248 HP constant speed pumps. The proposed pump station will incorporate the existing pumps and a third 215 HP pump to address the future flows anticipated upon completion of ongoing development in the area. Space for a fourth pump is being provided to allow for expansion in the future more easily. The electrical building will house the motor control center and variable frequency drive units. The building is climate-controlled to prevent damage to the drive units. The generator is housed in a noise attenuating cover to reduce the potential for noise complaints and meets the EPA Tier 2 requirements for emissions.
Lithia RW Storage/Pumping
Â MWI provided preliminary and final design, permitting and construction phase services support for a reclaimed water pumping station and 5.0 MGD storage tank. The project provided for expanded reclaimed water service in the South-Central Hillsborough County Service Area. The pumping station was designed to accommodate a total AADF (average annual daily flow) reclaimed water demand of 1.93 million gallons per day (MGD), and a total dry weather seasonal peak demand of 9.1 MGD or 6,300 gallons per minute (GPM). Five horizontal split case pumps were installed including three 125 horse power (HP) pumps at 2,100 GPM each, one 125 HP spare at 2,100 GPM, and one 75 HP jockey pump at 1,050 GPM. The facility also included a pre-cast concrete storage tank, access road and drainage facilities, an electrical building, and SCADA equipment for remote monitoring and control of the station.
Permits obtained for construction of the facility included SWFWMD ERP, Hillsborough County Site Development Permit, Hillsborough County EPC approval, and Florida Fish and Wildlife Gopher Tortoise permit. The site was home to several gopher tortoises. Part of the permitting required that the tortoises be relocated during project construction. Construction phase services support for this project included bid review and evaluation, shop drawing and submittal review, construction management, response to RFI’s, engineering site visits, pay application review, record drawing preparation, certifications, and providing a resident project representative. This $2.7 million dollar project was completed on schedule in December 2004.
Northlakes Reclaimed Water Pump Station Improvements
To provide for expanded reclaimed water service capacity in the Northwest Service Area, Hillsborough County planned the construction of a new reclaimed water pumping facility located at the Lakewood Park. MWI was contracted by the County to provide preliminary design, survey, geotechnical, design, permitting and construction phase services.
The pump station was designed to accommodate a total AADF (average annual daily flow) reclaimed water demand of 1,500 gallons per minute (GPM). Four horizontal split case pumps were utilized including 2 pumps at 600 GPM each, 1 spare at 600 GPM, 1 jockey pump at 300 GPM, and space for two future additional 600 GPM pumps. The design also included flow meter assemblies, site improvements, construction of a new electrical building, SCADA equipment compatible with the County system for remote monitoring and control of the station, and stormwater system improvements.
South County Reclaimed Water Pump Station replacement
To provide for expanded reclaimed water service capacity in the South County Service Area, Hillsborough County planned the replacement/expansion of a reclaimed water pumping facility located at the South County Advanced Wastewater Treatment Plant site. MWI was contracted by the County to provide preliminary design, survey, geotechnical, design, permitting and construction phase services.
The pump station was designed with a capacity to accommodate a total AADF (average annual daily flow) reclaimed water demand of 6,300 gallons per minute (GPM). Five horizontal split case pumps were used including three 150 horse power (HP) pumps at 2,100 GPM each, one 150 HP spare at 2,100 GPM, and one 75 hp jockey pump at 1,050 GPM. The design also included replacement of existing flow meter assembly, site improvements (including an access road), construction of a new electrical building, and SCADA equipment for remote monitoring and control of the station, and stormwater system improvements including retention/detention ponds.
Northwest Sludge Processing Facility
Metzger + Willard, Inc. is subcontracted to Montgomery Watson Harza to provide design and construction service for the Hillsborough County Northwest Class ‘A’ Sludge Processing Facility. This project includes the installation of thermal dryers which will process sludge (residuals) from all of the County’s wastewater treatment plants.
Metzger + Willard, Inc. provided survey services for the 13-acre Northwest Regional Sludge Management Facility. Cross sections were collected at 50 feet intervals with all visible at grade utility components, utility paint marks, pavement, curbing, sidewalks, driveways, ditches, fence lines, structures, and other pertinent features. The horizontal and vertical control survey was conducted in State Plane Coordinates (NAD 1983) with NGVD 1929 elevations. Project deliverables also included a nearly 10,000 linear foot Hillsborough County EPC Wetland Line Survey comprising 27.27 acres of wetlands on the 87.25 acre project site.
Metzger + Willard, Inc. is also providing civil site design, drainage system design, assistance with rezoning, environmental permitting, and construction phase services. The construction cost is estimated at $30,000,000.
Cypress Creek Wellfield
Metzger + Willard, Inc. was contracted by Reynolds, Smith and Hills to provide surveying services to support a wetland inventory of the Cypress Creek Wellfield for Tampa Bay Water. The Wellfield was designated by Tampa Bay Water as a Phase I Mitigation Program project and was a multi-objective wetland restoration and surface water management project. The objective of the project was to modify surface water drainage patterns and improve wetland hydrology. Survey was required to establish existing topographic indicator locations.
Metzger + Willard, Inc. provided surveying services for approximately 23,000 linear feet of topography, 9,240 linear feet of wetland line location, and 50 hydrologic indicator locations. The horizontal and vertical control survey was conducted in State Plane Coordinates (NAD 1983) with NGVD 1929 elevations. Deliverables included field notes and survey data recorder files.
Largo Sanitary Sewer Redevelopment Plan
Â MWI was contracted by Boyle Engineering to provide topographic surveying services for approximately 17,000 linear feet of proposed sewer line (15,000 feet of force main and 2,000 feet of gravity sewer). Cross sections were collected at 100 foot intervals from right-of-way to right-of-way with appropriate intermediate break points and all visible at grade utility components, utility paint marks, pavement, curbing, sidewalks, driveways, ditches, fence lines, and other pertinent features. The horizontal and vertical control survey was conducted in State Plane Coordinates (NAD 1983) with NAVD 1988 elevations. Design survey deliverables included plan-profile sheets for the proposed routes together with a lift station survey and easement description for the gravity sewer route.
South Central Hillsborough Infrastructure Improvement Project
Â To meet water supply needs of the South-Central Hillsborough County service area, Tampa Bay Water identified a list of projects known as South Central Hillsborough Improvement Projects (SCHIIP). Phase I addressed serving immediate needs and included constructing a regional connection between Tampa Bay Water Regional Facilities and the Lithia Water Treatment Plant, and installation of connection piping and alkalinity adjustment facilities at the Tampa Bay Water Regional Treatment Plant (TBWRTP) site. In addition to the regional improvements Hillsborough County entered into a JPA with Tampa Bay Water to make improvements to the existing water delivery system. These projects included an 8 MGD booster pumping facility installed in the northern part of the service area, and an ammonia facility installed at the Lithia Water Treatment Plant (WTP).
Working as a subconsultant to Malcolm Pirnie, MWI provided survey services, zoning support, permitting, site civil design, drainage design, and resident project representation for the improvements at the Lithia WTP, the TBWRTP, and the Highview 8-MGD Booster Pumping Facility. Permits were obtained for each of the three sites including, site development approvals through Hillsborough County Planning and Growth Management, SWFWMD permits, and a variance approval for set-backs through Hillsborough County Zoning, one permit through Florida Fish and Wildlife Commission for relocation of gopher tortoises.
Surveying services included approximately 675 linear feet of topographic survey with platted and maintained right-of-way determination on Highview Road, approximately 6.7 acres of topographic survey at Tampa Bay Regional WTP, and approximately 1,200 linear feet of topographic survey with wetland mapping and easement description at Lithia WTP. The horizontal and vertical control survey was conducted in State Plane Coordinates (NAD 1983) with NAVD 1988 elevations.
- C-factor testing
- Meter flow testing
- Fire hydrant flow testing
- Back flow device testing