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City of Dallas Long-Range Water Supply Strategies October 18, 2006 1 This Page Left Blank 2 Briefing Outline | Purpose | Background | Water Supply Strategies | Other Actions | Comparison of Draft City and State of Texas 2007 Water Plan Legislative Issues | Summary | Appendix A – Dallas Water Strategies Agenda and Letter | Appendix B - Fastrill Project | Appendix C - Water For Texas 2007 Volume I (Texas Water Development Board) 3 Purpose of Briefing | Update Council on the progress related to the City’s water supply strategies | Discuss the State’s 2007 Draft Water Plan issues and DWU’s legislative agenda 4 Background 5 Planning Efforts • Since 1822, at least one drought has hit somewhere in Texas every decade o Severe drought from 1951 - 57 o Salty water diverted from Red River o City leaders vowed "never again" o Series of Long Range Plans initiated: White R o ck Lake – 1950’s 1959, 1974, 1989, 2000, and 2005 o Dallas’ planning processes have successfully met the City’s needs since then o Dallas participates in the State’s regional planning process as part of the Region C Planning Group o Significant additional supply will be required to meet the needs of the City to the year 2060 and beyond 6 Ongoing Water Planning Activities | Multifaceted approach for water planning to ensure that Dallas citizens and customers have adequate and safe drinking water | Measures include: z Conservation plan z Reuse plan z Connecting existing reservoirs z Looking for additional water resources 7 8 Components of Water Supply Planning Demand Projected Existing Future Demand Supplies Needs Supply Reuse Conservation Existing 4 Project Cost Evaluation 201 Reuse $589 0 Reservoirs 202 Palestine $492 0 203 Toledo $325 0 Bend 204 Fostrill $129 0 New Reservoirs Ranking of Recommended Potential Strategies Strategies Potential Strategies 9 This Page Left Blank 10 Water Supply Strategies 11 Dallas Water Supply Strategies Adopted on March 9, 2005 | Connect existing supplies to Dallas’ system z Lake Fork anticipated late 2008/early 2009 z Lake Palestine by 2015 | Recommended Strategies z Water Conservation z Contract for return flows z Additional direct reuse z Lake Ray Hubbard and Lake Lewisville indirect reuse z Lake Wright Patman flood pool reallocation z Construct Lake Fastrill 12 Water Supply Strategies Conservation (savings) Date Additional Implementation Plan and Status Anticipated Supply (MGD) cumulative •April 13, 2005 Council approved the City’s 2005 Water Conservation Plan •Additional conservation activities are in progress, including implementation of single and multi-family toilet rebate 2010 15.70 programs; implemenation of residential landscape audit 2020 22.30 program; continuation of minor leak repair/fixture 2030 28.30 replacemement program for low-income/seniors Conservation (savings) 2040 34.50 customers; commercial kitchens initiative consisting of free 2050 40.80 pre-rinse spray nozzles and replacement of high-flow 2060 47.40 plumbing fixtures; continuation of plumbing fixture replacements and landscape conversions in city facilities; expansion of the school Environmental Educational Initiative; and continuation of multi-media public awareness campaign 13 Water Supply Strategies Recycled Water Implementation Plan and Status Date Additional Anticipated Supply (MGD) • Cedar Crest Golf Course began receiving treated effluent from Dallas’ Central WWTP Direct Non-potable Use - 2010 18.25 • Direct reuse implementation plan completed Recycled Water • Preparing to select a consultant to formulate a reuse business plan. •Water Rights permit application submitted to TCEQ on May 1, Augmentation (indirect) 2000 through Lake Ray •Water Rights permit application declared administratively 2012/ Hubbard and Lake 120.00 complete on December 5, 2001 2022 Lewisville - recycled •Awaiting TCEQ approval of Dallas' reuse permit. water •Expect approval of Dallas' reuse permit by the end of Oct 2006. 14 Water Supply Strategies Contract for Return Date Additional Implementation Plan and Status Flows Anticipated Supply (MGD) cumulative 2010 30.66 •Identifying wastewater discharges for potential return flow 2020 39.92 contract (i.e., obtain wastewater discharge permits for Contract for Return 2030 47.41 majority of discharges) Flows 2040 54.10 •Preparing boilerplate contract for return flows 2050 62.32 2060 71.02 15 Water Supply Strategies Connect Existing Implementation Plan and Status Water Supplies Date Additional Anticipated Supply (MGD) •Pump Station Contract approved by Council August 24, 2005 •Pipeline Design for final segment completed •Pipeline contract anticipated in 4th Qtr FY06 •Pipeline Interconnect Structure will be awarded in FY 07 Lake Fork 2007 107.00 •Projected Completion of Lake Fork capital improvements is 1st Qtr FY09 •Met with Tarrant Regional Water District (TRWD) to discuss bringing water from Lake Palestine through Cedar Creek Reservoir •Compiling water quality data for Lake Palestine Lake Palestine 2015 100.00 •Pump Station site acquired along with a few high priority parcels •Pipeline alignment must be determined •Working on possible project scope with TRWD. 16 Water Supply Strategies Obtain Water from Date Additional Implementation Plan and Status Existing Reservoirs Anticipated Supply (MGD) • April 13, 2005 - City Council authorized the City of Dallas participation in a contract with the Sulphur River Basin Authority for participation in the Sulphur River Basin Wide Study in concert with the Corps of Engineers, specifically for the reallocation of Wright Patman. • Draft contract prepared and submitted to Sulphur River Wright Patman Lake - 2035 1 00.00 Basin Authority (SRBA) for the Study...currently awaiting Flood Pool Reallocation SRBA action • Corps funding for a basin wide study is not available this FY, but a portion of work is going forward with SRBA and other north Texas regional water suppliers, to include basin wide data collection 17 Water Supply Strategies Develop New Implementation Plan and Status Date Additional Reservoirs Anticipated Supply (MGD) • April 13, 2005 - City Council authorized the City of Dallas participation in a feasibility study on the proposed Lake Fastrill; contract signed in October 2005 • Feasibility study finalized in Sep 2006. Technical supplement on alternative refuge sites to be completed in Nov 2006 • Initial feasibility study indicated in April 2006 that: 1) Fastrill project was feasible, and could meet the multiple objectives of water supply and wildlife preservation by relocating the refuge to an alternate site 2) Reservoir footprint conflicts with the proposed Refuge Lake Fastrill 3) The proposed refuge will contain significantly less (Additional detail is in 2045 100.00 bottomland hardwoods than other potential sites due to Appendix C) logging, and 3 other refuge sites along the Neches are equal to or better than the proposed Refuge • Met with Dale Hall, USFWS Director, in April 2006 who requested that we work with the Texas Parks and Wildlife Service to look for alternate refuge sites which protect more bottomland hardwoods • USFWS issued a FONSI for the North Neches Wildlife Refuge on June 12, 2006 prior to completion of alternate refuge site work (Additional funding will be needed) • Will seek to define process for future actions for Fastrill 18 Other Actions Activties to Support the Maximization of Existing Implementation Plan and Status Reservoir Yield Hydrologic Studies • Yield Studies to be undertaken this FY to determine firm yield • Lake Ray Hubbard and Lake Tawakoni Yield resulting from changing lake characteristics or operations • Volumetric Surveys to determine changes in reservoir volume Studies due to sedimentation…performed by the TWDB and partially • Lake Lewisville and Lake Ray Roberts Volumetric funded by the Corps of Engineers Surveys USGS Stream Gages Program Expansion • Upgrade stream gage below Lake Lewisville to a continuous read station • Install 2 new gages to enhance Dallas' ability to manage Elm Fork of the Trinity water rights 19 Other Actions Alternative Water Strategies Activities Toledo Bend Reservoir • Participation in discussions regarding possible reservation of water Lake o' the Pines • Determine availability and cost of water Ogallala Aquifer (groundwater) • Review Mesa proposal for water from the Ogallala aquifer • In progress Lake Texoma Water Quality and Red River Bromide Studies • Studies will assist in determining the treatability of water from Lake Texoma and the Red River 20 Water Supply: The Path to 2060 Total Established Sources Expected Future Challenges Need (MGD) • Ray Roberts/Lewisville Lake • Grapevine • Contract for Return Flows (71.02 MGD) • Lake Palestine (100.00 MGD) • Ray Hubbard • Indirect Reuse (120.00 MGD) • Conservation (47.40 MGD) • Tawakoni • Wright Patman Flood Pool (100.00 MGD) • Direct Reuse (18.25 MGD) • Elm Fork of Trinity • Fastrill (100.00 MGD) • Lake Fork 483.90 165.65 391.02 1,040.57 Note: All values based on 2060 conditions; MGD = million gallons per day 21 Issues Impacting Water Supply Strategy Implementation | Competing land uses | Impact of other State and Federal agencies | Environmental flows | Required coordination with other agencies and approval process | Permitting delays | Costs 22 City Legislative Issues and State of Texas 2007 Water Plan Draft City Legislative Agenda Water Issues State 2007 Draft Water Plan Legislative Issues A. Support Dallas’ water supply strategies as identified by the Reservoir Site and Mitigation Designation and Acquisition Texas Water Development Board (TWDB) and included in the 2007
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