The document summarizes water supply and demand information for San Angelo Water Utilities. It notes that the population served is 93,200 people through 32,000 connections. Water demand averages 14 million gallons per day annually but peaks at 26 million gallons in summer. Current surface water supplies from reservoirs are well below capacity due to drought. A new Hickory Groundwater Supply project will provide up to 10.7 million gallons per day by 2036 to supplement dwindling surface water sources. The utility has a multi-stage drought management policy to conserve water based on available supply levels with increasing restrictions as supplies decline.

1. San Angelo Water Utilities

2. Topics
 Customer Profile
 Water Demands
 Water Supplies
 Water Supply Status
 New Water Supplies
 Drought Management Policy
 Critical Supply Projection

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. Water Demands
 Annual Daily Average: 14 mgd
 Summer Peak: 26 mgd
 Winter Daily Average: 10 mgd
 Average Annual Usage: 16,000 acre-feet

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. O.H. Ivie Reservoir
Owned and operated by the Colorado River Municipal
Water District
Purpose: Water Supply
Supplies: Odessa, Big Spring, Snyder, Midland, Abilene,
San Angelo, Ballinger and Millersview-Doole
Storage Capacity: 554,339 acre-feet
Current Storage: 98,400 acre-feet
2011 Change in Storage: -81,820 acre-feet

7. Twin Buttes Reservoir
U.S. Bureau of Reclamation
Managed under contract by the City of San Angelo
Purpose: Water Supply, Irrigation and Flood Control
Supplies: City of San Angelo and Tom Green County
Water Control Improvement District #1
Storage Capacity: 186,244 acre-feet
Current Storage: 13,100 acre-feet
2011 Change in Storage: -22,344 acre-feet

8. Lake Nasworthy
Owned and operated by the City of San Angelo
Purpose: Water Supply
Supplies: City of San Angelo
Storage Capacity: 12,500 acre-feet
Current Storage: 8,200 acre-feet
2011 Change in Storage: -120 acre-feet

9. O. C. Fisher
COE - Upper Colorado River Authority
Purpose: Water Supply and Flood Control
Supplies: City of San Angelo and UCRA
Storage Capacity: 119,000 acre-feet
Current Storage: 1,000 acre-feet
2011 Change in Storage: -771 acre-feet

10. Lake Spence
Colorado River Municipal Water District
Purpose: Water Supply
Supplies: Odessa, Big Spring, Snyder, Midland,
San Angelo
Storage Capacity: 488,000 acre-feet
Current Storage: 2,300 acre-feet
2011 Change in Storage: -13,190 acre-feet

11. Thousands of Acre-Feet
20
140
0
40
120
160
200
100
180
60
80
1930
1932
1934
1936
1938
1940
1942
1044
1946
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1972
1974
1976
1978
1980
1982
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
Historic Lake Levels
2006
2008
2010
2012
O.C. Fisher
Twin Buttes
Lake Nasworthy

14. 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

15. 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.

16. 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

17. 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

18. Critical Supply Projection
 Worst case scenario: No Runoff
 Annual demand: 16,000 acre-feet
 Critical Supply Timeline: 19 months

19. Questions