Dallas' Long Range Water Supply Plan
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The Path to 2060: Dallas’ Long Range Water Supply Plan The State’s 16 Regional Planning areas are identified by the letters A to P. Dallas is in Region C. December 2, 2009 Purpose of Briefing Provide information on the City of Dallas’ water planning process and implementation of water supply strategies to meet the needs of Dallas’ citizens and customers to the year 2060 2 Fact Sheet The department is funded from water and wastewater revenues, and receives no tax dollars Approximately 1,500 employees Population served (treated water) 1.3 million - Dallas 980,000+ - wholesale customer cities 699 square mile service area 306,000 retail customer accounts 4,980 miles of water mains 4,250 miles of wastewater mains Treated 148.0 BG of water in FY09 meeting all regulatory guidelines Treated 58.1 BG of wastewater in FY09 3 Water Background Surface water is “owned” by the State of Texas, who in turn, grants permits for its beneficial use Dallas’ existing water rights were granted by the State based on serving the needs of Dallas and its customer cities Existing reservoirs were constructed as a result of planning actions from the 1950s It takes approximately 30 years to permit and construct a new reservoir As a result of the drought of record, Dallas initiated a series of long range water supply plans in 1959, 1979, 1990, 2000, and 2005 As a result of a drought in 1996 in which some cities ran out of water, the State initiated regional planning to ensure that the State has enough water for the next 50 years Currently we are in the third round of regional planning Previous plans were prepared for 2002, 2007, and now 2012 4 New Water Source Timeline Examples NEEDS LAND ASSESSMENT CONSTRUCTION CONNECT FEASIBILITY PERMITTING DESIGN ACQUISITION (1-3 years) (4-8 years) TO SYSTEM (2-5 years) (5-10 years) (3-5 years) (5-10 years) 0 3 6 13 17 24 30 Lake Ray Roberts took 25 years to build The U.S. Congress authorized construction in 1965 Permits granted in June 1976 In June 1987, the gates of the dam were closed The reservoir filled in May 1990 Lake Fork, existing source, was acquired in 1981 Total time will be 29 years to connect to Dallas’ system City paid debt service until 2005 Right of way acquisition began in the late 1980s, construction of pipeline and pump station began in October 2000 Projected time for construction to be completed is January 2010 5 Where We Are Today Both Dallas and customer cities enjoy lower water rates because of a regional approach to water acquisition and supply Dallas shares costs with customer cities based on a 30-year Memorandum of Agreement (MOA) and has had a successful relationship with its customer cities for more than 50 years With a “consensus based approach” in mind, Dallas and the customer cities have been meeting to revise the MOA which expires December 2009 City staff anticipates briefing City Council in January 2010 on results and proposal Dallas and other area water agencies looking to 2060 for possible water sources Regional approach for new water sources Funding for new water sources is more cost effective when it is a collaborative effort Even with conservation and reuse, additional water supply sources for Dallas will be needed by 2035 6 DALLAS WATER SERVICE AREA COOKE GRAYSON WISE DENTON COLLIN FANNIN HUNT RAY ROBERTS LAKE LEWISVILLE LAKE LAKE RAY LAKE HUBBARD TAWAKONI LAKE FORK RESERVOIR HOPKINS ELM ROCKWALL FORK RAINS GRAPEVINE WTP LAKE DALLAS FORNEY INTAKE & PUMP HUNT STATION BACHMAN PUMP (FUTURE) WTP STATION IRON TAWAKONI BRIDGE BALANCING PUMP EASTSIDE RESERVOIR STATION WTP WOOD SOUTHEAST WTP (FUTURE) SMITH TARRANT DALLAS JOHNSON ELLIS KAUFMAN VAN ZANDT HENDERSON LAKE PALESTINE BOOSTER PUMP STATION (FUTURE) LEGEND Trinity River Water Service Area INTAKE&PUMP Existing Water Sources STATION (FUTURE) Future Water Sources Existing Water Treatment Plant Future Water Treatment Plant Existing Facilities Future Facilities Existing Pipeline Future Pipeline 18vov09 7 Planning Guidelines Dallas’ plan is to have enough reservoir firm yield to meet water demands equivalent to the drought of record in the 1950s Dallas’ ranking for planned new water supply sources has been based on: Costs – capital construction and power Efficiency Environmental impact Likelihood for development Water located closer to the City is generally less expensive Lower infrastructure costs due to shorter pipelines Lower pumping (energy) costs – a recurring, annual expense Dallas is included in Region C as part of the Statewide water planning effort Working with other area water providers to achieve greater economies of scale and thus reduce costs 8 Components of Water Supply Projected Demand Planning Future Needs Projected Existing Future Demand Supplies Needs Existing Supply Reuse Conservation Existing 4 Project Cost Evaluation 201 Reuse $589 Reservoirs 0 Reservoirs 202 Palestine $492 0 203 Toledo $325 0 Bend 204 Fostrill $129 New 0 Reservoirs Ranking of Recommended Potential Strategies Strategies Potential Strategies 9 Dallas’ Current Water Supply Strategies Sustainability Actions Dallas built its water system to meet the drought of record The drought of record is the worst recorded drought used for planning municipal water supplies Dallas’ drought of record was a seven year period in the 1950’s To minimize water usage, Dallas has undertaken several sustainability actions Leak detection Maintenance and repair Conservation and reuse Actions are to sustain what we have, and add new sources to meet future growth 11 Sustainability Initiatives Major Maintenance Initiatives Reduce water loss by expanding leak detection to survey system every 2.5 years instead of 5 years Unaccounted For Water for FY09 was 9.1% (industry goal is 10%) Increased large wastewater main assessment and replacement in support of Sanitary Sewer Initiative FY10 budget maintains annual replacement rate of 1.5% for aged mains Focus on Infrastructure Rehabilitation and Maintenance For the prior three years, approximately $465M or 50% of the Capital Program addresses maintenance of existing infrastructure For FY10, $133.7M of $293.3M of the capital program is budgeted for water/ wastewater main replacements Dividends from enhanced conservation initiatives 34 MGD savings in water from 2001-2009 Equates to 70% of the 47.40 goal for 2060 A new 5-year water conservation strategic plan is currently underway Reuse Initiatives – 88 MGD identified in current efforts Indirect – working with North Texas Municipal Water District to swap reuse water • 40 MGD to Lake Ray Hubbard • 36 MGD to Lake Lewisville Return Flows – 12 MGD to Lake Lewisville Direct – Cedar Crest golf course (less than 1 MGD) 12 Current Dallas Water Supply Strategies (Included in the State’s 2007 Water Plan) Strategies were adopted by the City Council in March 2005 Connect existing supplies to Dallas’ system Lake Fork (currently in startup phase) Lake Palestine by 2015 (joint pipeline study underway with Tarrant Regional Water District) Recommended Strategies Water Conservation Additional direct reuse Lake Ray Hubbard and Lake Lewisville indirect reuse Contract for return flows Lake Wright Patman floodpool reallocation Construct Lake Fastrill = in progress 13 The Path to 2060 – Water Supply of 1,036.11 MGD Total Current Underway Likely Unsecured Need (MGD) • Lake Fork - Startup • Contract for Return Flows - Phase (102.54 MGD) various dates (71.02 MGD) • Ray Roberts/Lewisville • Lake Palestine - 2015 • Ray Hubbard Indirect • Grapevine • Wright Patman Flood Pool - 2035 (100.00 MGD) Reuse - permitted - 2012 • Ray Hubbard (100.00 MGD) • Conservation - various (60.00 MGD) • Tawakoni • Fastrill - 2045 (100.00 MGD) dates (47.40 MGD) • Lewisville Indirect Reuse - • Elm Fork of Trinity • Direct Reuse - various permitted - 2022 (60.00 dates (18.25 MGD) MGD) 376.90 268.19 191.02 200.00 1,036.11 • Our water supply in 2060 totals 1036.11 MGD 1036.11 (need) • Currently we have 376.90 MGD connected - 376.90 (current) • We are reasonably assured of an additional 268.19 MGD - 268.19 (underway) (underway) - 191.02 (likely) • An additional 191.02 MGD is likely = 200.00 • Wright Patman and Fastrill, totaling 200 MGD, are yet to be secured • 80 percent of 2060 water needs are reasonably assured, which meets Dallas’ water needs through the year 2035 14 Recommended Water Management Strategies Progress Report Water Projected Progress Project Status Management Supply Strategies (MGD) Lake Fork 102.54 - Pipeline construction is complete (currently in startup phase) Startup Lake Palestine 100.0 - Study with Tarrant Regional Water District to determine corridor Corridor selection Study/Contract - Project Financing and Facilities Agreement with TRWD March 2010 Negotiations Conservation 47.40 - Conservation program underway Underway - Average annual savings are estimated to be approximately 34 MGD - April 2005 5-year strategic plan currently being updated Direct Reuse 18.25 - Cedar Crest golf course currently using direct reuse water Underway - Plans are underway to add additional facilities Return Flows 71.02 - Obtained approximately 12 MGD of return flows as part of the Underway Lewisville Lake Reuse permit Lake Ray 60.0 - Negotiated with NTMWD for reuse swap (Approx. 40 MGD) Design Hubbard - Contract finalized in December 2008. Underway Reuse - Infrastructure to facilitate swap under design. Lewisville 60.0 - Negotiated with NTMWD for reuse swap (Approx. 36 MGD) Contract Lake Reuse - Contract finalized in December 2008. Negotiations - NTMWD Reuse