San Angelo Water Supply Status March 2012

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San Angelo Water Supply Status March 2012

  1. 1. San Angelo Water Utilities
  2. 2. Topics Customer Profile Water Demands Water Supplies Water Supply Status New Water Supplies Drought Management Policy Critical Supply Projection
  3. 3. Customer Profile Population: 93,200 Water Connections: 32,000 Water demand by customer category:  Residential 62%  Commercial 20%  System Operation 14%  Industrial 4% Notable entities:  Goodfellow Air Force Base  Angelo State University  Shannon Medical Center  Community Medical Center
  4. 4. Water Demands Annual Daily Average: 14 mgd Summer Peak: 26 mgd Winter Daily Average: 10 mgd Average Annual Usage: 16,000 acre-feet
  5. 5. Water Supplies All current water supplies are surface water  Reservoirs and Lakes  Highly impacted by drought Primary Sources:  O.H. Ivie Reservoir  Twin Buttes Reservoir  Lake Nasworthy  O.C. Fisher Reservoir  Lake Spence
  6. 6. O.H. Ivie ReservoirOwned and operated by the Colorado River Municipal Water DistrictPurpose: Water SupplySupplies: Odessa, Big Spring, Snyder, Midland, Abilene, San Angelo, Ballinger and Millersview-DooleStorage Capacity: 554,339 acre-feetCurrent Storage: 98,400 acre-feet2011 Change in Storage: -81,820 acre-feet
  7. 7. Twin Buttes ReservoirU.S. Bureau of ReclamationManaged under contract by the City of San AngeloPurpose: Water Supply, Irrigation and Flood ControlSupplies: City of San Angelo and Tom Green County Water Control Improvement District #1Storage Capacity: 186,244 acre-feetCurrent Storage: 13,100 acre-feet2011 Change in Storage: -22,344 acre-feet
  8. 8. Lake NasworthyOwned and operated by the City of San AngeloPurpose: Water SupplySupplies: City of San AngeloStorage Capacity: 12,500 acre-feetCurrent Storage: 8,200 acre-feet2011 Change in Storage: -120 acre-feet
  9. 9. O. C. FisherCOE - Upper Colorado River AuthorityPurpose: Water Supply and Flood ControlSupplies: City of San Angelo and UCRAStorage Capacity: 119,000 acre-feetCurrent Storage: 1,000 acre-feet2011 Change in Storage: -771 acre-feet
  10. 10. Lake SpenceColorado River Municipal Water DistrictPurpose: Water SupplySupplies: Odessa, Big Spring, Snyder, Midland, San AngeloStorage Capacity: 488,000 acre-feetCurrent Storage: 2,300 acre-feet2011 Change in Storage: -13,190 acre-feet
  11. 11. Thousands of Acre-Feet 20 140 0 40 120 160 200 100 180 60 80 1930 1932 1934 1936 1938194019421044194619481950 1952 195419561958196019621964196619681970 19721974197619781980198219841986198819901992199419961998200020022004 Historic Lake Levels200620082010 2012 O.C. Fisher Twin Buttes Lake Nasworthy
  12. 12. New Water Supplies Hickory Groundwater Supply  35,000 acres of groundwater rights acquired in 1972  62 miles southeast of San Angelo in McCullough County near Brady, Texas  Arbitrated water allocations: Development Phase Year Allocation I 2013 6 mgd II 2026 9 mgd III 2036 10.7 mgd
  13. 13. New Water Supplies (Cont.) Hickory Groundwater Supply (Continued)  Project Cost: $120,000,000  Wellfield and transmission piping under contract with projected completion of June 2013.  Pump Station and Well Development bidding and projected completion of June 2013  Treatment Plant for Radionuclides projected for completion in early 2014.
  14. 14. Drought Management Policy Multi-stage with trigger points based on supplies Principles:  Public Education  Progressive restrictions on outside watering until prohibited in final stage  Progressive surcharges for ‘excess’ use of water  Enforcement Provisions
  15. 15. Drought Management Policy (Cont.) Implementation Stages are based on available supply from all sources:  Water Conservation: > 2 years supply  Drought Level 1: < 2 years supply  Drought Level 2: 18 months or less  Drought Level 3: 12 months or less
  16. 16. Critical Supply Projection Worst case scenario: No Runoff Annual demand: 16,000 acre-feet Critical Supply Timeline: 19 months
  17. 17. Questions

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