Planning Today For Water Tomorrow

Transcription

1 Planning Today For Water Tomorrow Planning ahead is always smart, especially when it comes to something as important as drinking water. The Tampa Bay region expects to gain half a million people by 2030, increasing the demand for drinking water beyond the current supply. That s why we re planning now so we have the right supply ready at the right time to keep our region growing and thriving.

2 Evaluating Options In 2018, potential projects will be evaluated using the following detailed criteria, which are based on goals approved by Tampa Bay Water s board of directors: Regional Need, Regional Solutions With a system that spans three counties and includes 295 miles of pipeline, 21 points of connection, 13 wellfields, two surface water intakes, a surface water treatment plant, a seawater desalination plant and a 15.5 billion gallon reservoir, planning for the future is more than just adding a new source. We have to examine how much water our region will need and where to best serve our members. We update our Long-term Master Water Plan every five years to ensure our region has new water supplies on tap when needed. Our comprehensive planning effort includes numerous studies, computer models and analyses that examine both supply and demand. The current update will be completed in 2018, and will tell us how much water we ll need and where we need it. That gives us plenty of time to design, permit and build the next new water supply before it s needed in the 2028 timeframe. A new drinking water project will only be considered if it can produce safe, clean drinking water. Environmental stewardship Includes local/federal/state permitting, sustainability of natural resources, carbon footprint and public acceptance. Project costs Includes capital costs, property acquisition, operations and maintenance, life cycle costs and the ability to build the project in increments. Reliability Includes resiliency, emergency condition benefits, vulnerability, proven technology/application, regional system operations, institutional factors and risk factors. The top-ranked project(s) will be recommended for detailed engineering design and permitting activities. The recommendation will be made to Tampa Bay Water s board of directors in late 2018, and if approved, work will begin in Once detailed design and permitting is completed and costs are known, the board will select which project(s) to build to meet the region s drinking water needs. New Sources of Supply Our project team is investigating four different source waters: groundwater, seawater, surface water and reclaimed water. Each of these sources can produce high-quality drinking water, thanks to advanced processes that filter and disinfect. Right now, we have a diverse supply system that includes groundwater, seawater and surface water. The fourth option, reclaimed water, is wastewater that has been cleaned and recovered for useful purposes. Sometimes called recycled water, reclaimed water is used by many communities in the Tampa Bay region for lawn irrigation. Reclaimed water could supplement our existing sources to bolster drinking water supplies without taking more water from the environment. Recycling water is a drought-resistant, safe and sustainable alternative that may be cost-effective. Project concepts may change or be eliminated as the project team conducts technical analyses and meets with stakeholders, including regulatory agencies. Variations for each concept are being evaluated, including options being explored by the City of Tampa and Hillsborough County.

3 Project concepts: Aquifer Recharge and Withdrawal: Recharging the Floridan Aquifer using reclaimed water that has been cleaned to drinking water standards, which increases water levels, so groundwater can be withdrawn and treated to produce high-quality drinking water for distribution. Surface Water Expansion: Withdrawing more water from the Alafia River or adding reclaimed water to the Regional Surface Water Treatment Plant to supplement the existing supply. Reclaimed water may augment the existing river water flow into the plant or it may be cleaned to drinking water standards at a new advanced, multi-barrier facility then blended with high-quality drinking water for distribution. Tampa Bay Desalination Expansion: Withdrawing more seawater from Tampa Bay or supplementing the existing source with reclaimed water. Reclaimed water may augment the existing flow into the plant or may be cleaned to drinking water standards at a new advanced, multi-barrier facility then blended with high-quality drinking water for distribution. Gulf Coast Desalination: A new desalination facility co-located with the Anclote Power Plant that would desalinate seawater from the Gulf of Mexico.

4 PLANNING FOR THE FUTURE Aquifer Recharge & Withdrawal Tampa Bay Water s current supply is expected to meet the region s water needs through 2028, even with projected growth. Aquifer recharge, as well as a number of potential new water supplies, is being investigated now to ensure adequate water supply in the future because it can take 10 years or more to evaluate, design, permit, fund, build and startup a new water supply project. Project Overview Aquifer recharge and withdrawal involves recharging the Floridan Aquifer with high-quality reclaimed water to bolster drinking water supplies and achieve a net benefit to the aquifer. There are two ways this can be accomplished: 1. Augment the drinking water zone of the aquifer with reclaimed water that has gone through proven, multibarrier treatment processes and has been verified safe through monitoring. This increases aquifer levels so groundwater can be withdrawn and treated to produce high-quality drinking water. 2. Augment a non-potable zone of the aquifer with reclaimed water to increase aquifer levels. This concept would result in a credit to withdraw groundwater at a distant location for treatment and distribution. NON-POTABLE ZONE POTABLE ZONE Withdrawal Well Recharge Wells High-quality Reclaimed Water Withdrawal Well Recharge Well Reclaimed Water Withdrawal Well Gulf of Mexico Intermediate Aquifer System Intermediate Aquifer System Upper Floridan Aquifer Upper Floridan Aquifer Fresh Water Seawater Brackish Water Fresh Water Aquifer recharge, in either a potable or non-potable zone, can increase water levels so groundwater can be withdrawn and treated to high-quality drinking water standards. Tampa Bay Water is currently identifying potential recharge and withdrawal wellfield locations and conducting modeling scenarios to confirm the feasibility of these options. The goal is to produce up to 20 million gallons per day of drinking water. Additionally, the project team is working closely with Hillsborough County, which is also investigating beneficial uses of reclaimed water to recharge the aquifer as part of its South Hillsborough Aquifer Recharge Project (SHARP). The City of Tampa is investigating aquifer recharge and withdrawal through its Tampa Augmentation Project (TAP). Technical information on these projects will be incorporated into Tampa Bay Water s long-term planning process to support a consistent evaluation of all project concepts for regional use.

5 Next Steps Aquifer Recharge & Withdrawal Tampa Bay Water is studying the feasibility of various aquifer recharge and withdrawal options. Additionally, we will continue to work with Hillsborough County and the City of Tampa to determine feasibility and cost-effectiveness of these projects for regional use. Additional efforts include: Water quality and treatment analyses of the reclaimed water Identifying infrastructure needs and costs Preliminary pipeline routing and potential property needs Permitting and regulatory evaluations Groundwater modeling Cost projections Public Outreach Stakeholder input has already shaped the Long-term Master Water Plan and will continue to do so over the next two years. We are meeting regularly with our member governments, property owners, regulators and others. And we recently conducted a public opinion survey which gave us valuable insights on residents opinions on a variety of water-related matters. We ll be making community presentations and scheduling public meetings once more information is available on the various concepts. If you would like to schedule a speaker for your community, business or civic group, call Kathleen Goelz at or go to and click on Contact Us. Long-term Master Water Plan This project is one of several under consideration in Tampa Bay Water s Long-term Master Water Plan. This 20-year framework for meeting the region s drinking water needs examines demand, existing supplies, conservation, weather variability, drought contingencies as well as potential future supplies and their ability to supply clean, high-quality drinking water to the Tampa Bay region. Each project under consideration will be evaluated using detailed criteria in three categories: environmental stewardship, project costs and reliability. The top-ranked project(s) will be presented to Tampa Bay Water s board of directors for approval in late For more information, go to and under Water Supply, click Future Sources.

6 PLANNING FOR THE FUTURE Gulf Coast Desalination Tampa Bay Water s current supply is expected to meet the region s water needs through 2028, even with projected growth. A number of potential new water supplies, including Gulf Coast Desalination, are being investigated now to ensure adequate water supply in the future because it can take 10 years or more to evaluate, design, permit, fund, build and startup a new water supply project. Project Overview The Gulf Coast Desalination concept is a 9- to 25- million gallon per day (mgd) facility co-located with the Duke Energy Anclote Plant in southwest Pasco County. Previous work, including environmental studies, pilot testing and public input, provided valuable information and showed the project could be designed to meet the community s needs in an environmentally sound manner. While the project was not selected for implementation in 2003, it has remained a part of Tampa Bay Water s Long-term Master Water Plan for future consideration. Co-location Previous studies concluded that co-location with the Anclote Plant is a cost effective and environmentally sound project configuration. With co-location, the desalination plant would use the power plant s existing structures, which would minimize the environmental impacts of new construction. Key elements of co-location include: Shared intake. The desalination plant would use the power plant s cooling water discharge as the source water to the desal plant, eliminating the need for a new seawater intake. Blended concentrate discharge. The concentrated seawater left over from the desalination process would be blended and diluted with the power plant s cooling water in the power plant s discharge canal before the water flows to the Gulf of Mexico. Modeling of a maximum concentrate flow of 53 million gallons per day shows this configuration provides rapid mixing under most conditions and minimal salinity increases within normal tolerances in a relatively small area. Next Steps The Anclote Plant was previously owned by Florida Power, which has since changed ownership twice. The current owner, Duke Energy, acquired the facility in 2011, so one of the most important aspects of this project is meeting with Duke Energy to discuss the project s feasibility. Duke Energy has identified a parcel of land that may be suitable for the proposed desalination facility, and the project team is investigating this option. Additionally, the project team will continue discussions with Duke Energy regarding plant operations and construction

7 Gulf Coast Desalination Reverse osmosis is a common way to desalinate seawater. High pressure forces pretreated water through semi-permeable membranes to separate freshwater and saltwater. considerations to determine if this option is still compatible with the Anclote Power Plant and Duke Energy s long-term plans. Other tasks include: Evaluating potential points of connection, pipeline corridors and pumping station needs in order to convey desalinated water into the regional drinking water system Exploring technological advances in desalination technology Investigating technologies that may reduce energy consumption or increase energy recovery Evaluating permitting requirements Public Outreach Stakeholder input has already shaped the Long-term Master Water Plan and will continue to do so over the next two years. We are meeting regularly with our member governments, property owners, regulators and others. And we recently conducted a public opinion survey which gave us valuable insights on residents opinions on a variety of water-related matters. We ll be making community presentations and scheduling public meetings once more information is available on the various concepts. If you would like to schedule a speaker for your community, business or civic group, call Kathleen Goelz at or go to and click on Contact Us. Long-term Master Water Plan This project is one of several under consideration in Tampa Bay Water s Long-term Master Water Plan. This 20-year framework for meeting the region s drinking water needs examines demand, existing supplies, conservation, weather variability, drought contingencies as well as potential future supplies and their ability to supply clean, high-quality drinking water to the Tampa Bay region. Each project under consideration will be evaluated using detailed criteria in three categories: environmental stewardship, project costs and reliability. The top-ranked project(s) will be presented to Tampa Bay Water s board of directors for approval in late For more information, go to and under Water Supply, click on Future Sources.

8 PLANNING FOR THE FUTURE Tampa Bay Seawater Desalination Expansion Tampa Bay Water s current supply is expected to meet the region s water needs through 2028, even with projected growth. A number of potential new water supplies, including expanding the Tampa Bay Seawater Desalination Plant, are being investigated now to ensure adequate water supply in the future because it can take 10 years or more to evaluate, design, permit, fund, build and startup a new water supply project. Project Overview Tampa Bay Water s desalination plant was designed to accommodate future expansion. This project concept includes expanding the facility by approximately 10 million gallons per day using one of two possible sources: Seawater from the Big Bend Power Plant s cooling water system Reclaimed water to the desalination plant Seawater The Big Bend Power Plant cooling system currently supplies the desalination plant with its source of seawater and could supply an additional 10 million gallons per day. This option would take advantage of existing infrastructure, but the pretreatment, reverse osmosis and chemical facilities would have to be modified to accommodate the expansion. Reclaimed Water There are two options for using reclaimed water for increasing the desalination plant s capacity. By recycling water, we can bolster drinking water supplies without taking more water from the environment. One option is to blend reclaimed water that has been cleaned and disinfected through proven, multibarrier treatment processes with desalinated seawater. This option would require a new water treatment facility built at or near the Tampa Bay Seawater Desalination Plant. Another option is to add reclaimed water to the front end of the plant, blend it with seawater, and purify the water through the facility s multi-barrier pretreatment, filtration, reverse osmosis and post-treatment processes. Like seawater, this option would take advantage of existing infrastructure, but other processes would have to be modified. Exploring Energy Savings Seawater desalination is energy intensive, costing twice as much as surface water and four times as much as groundwater, so we are examining ways to save energy and money. One examination is whether blending seawater with reclaimed water would reduce the salinity enough to reduce energy demands and energy costs. The project team is also exploring new technologies that could reduce power costs or increase energy recovery.

9 Tampa Bay Seawater Desalination Expansion The Tampa Bay Seawater Desalination Plant has produced 29.5 billion gallons of drinking water since the renovated facility came on line in late Next Steps Tampa Bay Water s project team is conducting numerous assessments: Water quality and treatment analyses of the reclaimed water Technological advances in seawater desalination treatment Permitting requirements Infrastructure needs Public Outreach Stakeholder input has already shaped the Long-term Master Water Plan and will continue to do so over the next two years. We are meeting regularly with our member governments, property owners, regulators and others. And we recently conducted a public opinion survey which gave us valuable insights on residents opinions on a variety of water-related matters. We ll be making community presentations and scheduling public meetings once more information is available on the various concepts. If you would like to schedule a speaker for your community, business or civic group, call Kathleen Goelz at or go to and click on Contact Us. Long-term Master Water Plan This project is one of several under consideration in Tampa Bay Water s Long-term Master Water Plan. This 20-year framework for meeting the region s drinking water needs examines demand, existing supplies, conservation, weather variability, drought contingencies as well as potential future supplies and their ability to supply clean, high-quality drinking water to the Tampa Bay region. Each project under consideration will be evaluated using detailed criteria in three categories: environmental stewardship, project costs and reliability. The top-ranked project(s) will be presented to Tampa Bay Water s board of directors for approval in late For more information, go to and under Water Supply, click on Future Sources.

10 PLANNING FOR THE FUTURE Surface Water Expansion Tampa Bay Water s current supply is expected to meet the region s water needs through 2028, even with projected growth. A number of potential new water supplies, including additional surface water, are being investigated now to ensure adequate water supply in the future because it can take 10 years or more to evaluate, design, permit, fund, build and startup a new water supply project. Project Overview This project concept increases the amount of water provided by the Tampa Bay Regional Surface Water Treatment Plant. Two sources of raw water are under consideration: additional water from the Alafia River or reclaimed water. Alafia River Tampa Bay Water has withdrawn water from the Alafia River for 15 years. The current permitted withdrawal schedule varies with available flows and protects the river s ecosystem. Data collected since 2000 shows that additional water could be withdrawn without harming the river. Reclaimed Water Reclaimed water is wastewater that has been recovered and cleaned for useful purposes. Like seawater or river water, reclaimed water can be cleaned to drinking water standards by advanced processes that filter and disinfect, such as microfiltration and advanced oxidation. Tampa Bay Water is exploring two reclaimed water options at the Tampa Bay Regional Surface Water Treatment Plant: Blending raw river water with reclaimed water at the start of the treatment plant. The blended water would go through an advanced, multi-barrier process that produces clean, high-quality drinking water. Cleaning reclaimed water to drinking water standards at a new advanced, multi-barrier process facility before blending it with the surface water treatment plant s high-quality drinking water. Tampa Bay Water is exploring the use of reclaimed water because water is too valuable to be used just once. By recycling water, we can bolster drinking water supplies without taking more water from the environment. Next Steps Tampa Bay Water staff is conducting numerous assessments: Surface water modeling at various withdrawal rates from the Alafia River to determine sustainable yield Facility analyses to determine new infrastructure needs Cumulative impact analysis modeling Pipeline routing and potential property needs Reclaimed water availability from City of Tampa Permitting evaluations

11 Surface Water Expansion Surface water provides about a third of the region s drinking water supply and care is taken to ensure withdrawals are done in an environmentally sound manner. Public Outreach Stakeholder input has already shaped the Long-term Master Water Plan and will continue to do so over the next two years. We are meeting regularly with our member governments, property owners, regulators and others. And we recently conducted a public opinion survey which gave us valuable insights on residents opinions on a variety of water-related matters. We ll be making community presentations and scheduling public meetings once more information is available on the various concepts. If you would like to schedule a speaker for your community, business or civic group, call Kathleen Goelz at or go to and click on Contact Us. Long-term Master Water Plan This project is one of several under consideration in Tampa Bay Water s Long-term Master Water Plan. This 20-year framework for meeting the region s drinking water needs examines demand, existing supplies, conservation, weather variability, drought contingencies as well as potential future supplies and their ability to supply clean, high-quality drinking water to the Tampa Bay region. Each project under consideration will be evaluated using detailed criteria in three categories: environmental stewardship, project costs and reliability. The top-ranked project(s) will be presented to Tampa Bay Water s board of directors for approval in late For more information, go to and under Water Supply, click on Future Sources.

12 2575 Enterprise Road, Clearwater, Florida The tap water delivered to your local utility meets or is superior to all state and federal drinking water standards. In fact, tap water delivered to your utility is tested daily, weekly and monthly in laboratories that are certified by the Florida Department of Health.