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Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.
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Transcript of Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.
![Page 1: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/1.jpg)
Lake 7 Update
HDR Engineering, Inc.
TWCA Annual Convention
March 3-5, 2010
![Page 2: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/2.jpg)
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2007 Strategic Water Supply Plan
![Page 3: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/3.jpg)
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Existing Long-Term Supplies
Bailey CountyWell Field
4,000 acft/yr
Lake Meredith
6,000 acft/yr
Roberts CountyWell Field
23,000 acft/yr
Park/SchoolWells
2,000 acft/yrTotal Supplies35,000 acft/yr
![Page 4: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/4.jpg)
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Current Supply Limitations
Lake Meredith Firm yield reduced from >103,000 acft/yr to <60,000 acft/yr Lubbock allocation reduced from 26,000 acft/yr
to 6,000 acft/yr Roberts County Well Field
Lubbock allocation increased to 26,000 acft/yr in 2009. Bailey County Well Field
Target: 10,000 acft/yr (30-40 years) Recharge rate: 3,000 to 4,000 acft/yr Short-term demand: > 10,000 acft/yr
![Page 5: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/5.jpg)
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Region O Water Plan(Initially Prepared 2011 Plan)
Lubbock Water Needs (year 2060)
Demand = 56,516 acft/yr
Supply = 34,876 acft/yr
Shortage = 21,640 acft/yr
Lubbock Plan Components
Municipal Water Conservation (7,662 acft/yr)
Lake Alan Henry Pipeline (21,880 acft/yr)
Lake 7 (17,650 acft/yr – stand-alone)
Post Reservoir (25,720 acft/yr – stand-alone)
North Fork Diversion Operation (26,169 acft/yr – stand-alone)
Brackish Groundwater Desalination (3,360 acft/yr)
![Page 6: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/6.jpg)
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Jim Bertram System Lake 7
![Page 7: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/7.jpg)
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Lake 7 Overview
Capacity: 20,700 acft Area: 1,100 acres Supply Sources:
Unappropriated State water Developed playa lake storm water Developed City return flows
Supply: 17,650 acft/yr firm yield – varies with return flows Cost: $10.1 million (reservoir only – 2011 Region O Plan) Status
Included in 2006/2011 Region O Plan TCEQ Water Right Application No. 5921 pending Feasibility analysis under way
![Page 8: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/8.jpg)
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Lake 7 Dam Site
![Page 9: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/9.jpg)
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Lake 7 Conceptual Plan
![Page 10: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/10.jpg)
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Lake 7 Conceptual Plan
![Page 11: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/11.jpg)
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Lake 7 Status
TCEQ Application No. 5921 Filed October 17, 2005 Administratively Complete in April 2006 Seeks appropriation of:
– Unappropriated State water (little available)– Developed storm water from playa lake system– Future return flows
TCEQ Technical RFI regarding environmental issues
![Page 12: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/12.jpg)
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Lake 7 Status
Environmental assessment Data collected during summer/fall of 2009 Analysis of data continues Updated Environmental Information Document – Spring 2010
Geotechnical evaluation Core drilling completed September 2009 Draft report under preparation No “fatal flaws”
Feasibility report – Spring 2010 Environmental and geotechnical evaluations Flood hydrology for spillway sizing and costing Optimize size of project
![Page 13: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/13.jpg)
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Lake 7 Status
![Page 14: Lake 7 Update HDR Engineering, Inc. TWCA Annual Convention March 3-5, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649ea75503460f94baa1c9/html5/thumbnails/14.jpg)
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Interfaces of the Various Projects
Bailey CountyWell Field
Lake Meredith Roberts CountyWell Field
Park/SchoolWells
Water Conservation
Water Reuse
Lake Alan Henry
Lake 7
Post Reservoir
North Fork Diversion
Developed Storm Water