Section 2
Population and Water Demand Projections
In order to develop water plans to meet future water needs, it is necessary to make projections of future population and water demands for the region. For purposes of the South Central Texas Region, the Texas Water Development Board (TWDB) has made both population and water demand projections for cities, rural areas, and water using purposes for each of the 21 counties of the region. These counties are located in six major river basins (Nueces, San Antonio, Guadalupe, Lower Colorado, Lavaca, and Rio Grande) and three coastal basins (Colorado-Lavaca, Lavaca-Guadalupe, and San Antonio-Nueces) (Table 2-1). In accordance with TWDB Rules, Section 357.5(d), which states, “In developing regional water plans, regional water planning groups shall use: (1) state population and water demand projections contained in the state water plan or adopted by the board after consultation with the Texas Natural Resource Conservation Commission and Texas Parks and Wildlife Department in preparation for revision of the state water plan; or (2) in lieu of paragraph (1) of this subsection, population or water demand projection revisions that have been adopted by the board, after coordination with Texas Natural Resource Conservation Commission and Texas Parks and Wildlife Department, based on changed conditions and availability of new information. Within 45 days of receipt of a request from a regional water planning group for revision of population or water demand projections, the executive administrator shall consult with the requesting regional water planning group and respond to their request.” The TWDB-approved projections are presented below.
2.1 Population Projections
The 1996 estimates published by the U.S. Bureau of the Census indicate that Texas currently ranks as the second most populated state in the nation, with a population of more than 18.3 million. The population of the South Central Texas Region was estimated at 2.0 million in 1996 and is projected to be 4.5 million in 2050 (Table 2-2 and Figure 2-1). Approximately 75 percent of the population of the region is projected to reside in the San Antonio River Basin. The TWDB’s population projections for 83 individual cities and 48 rural areas of each county and part of county of each river basin area of the South Central Texas Region are shown in Table 2-3.
2.2 Municipal Water Demand Projections
The projected quantity of water needed for municipal purposes depends upon population growth, climatic conditions, and water conservation measures. For planning purposes, municipal water demand includes residential and commercial water uses. Commercial water use includes business establishments, and public offices and institutions. Residential and commercial uses are categorized together because they are similar types of uses (i.e., they both use water primarily for drinking, cleaning, sanitation, air condition, and landscape watering).
Although per capita water use, in gallons per person per day, is projected to decline over the planning period, this will be more than offset by the projected increase in population, which is expected to cause municipal water demand in the South Central Texas Region to increase by almost 1.5 times the 1990 reported use (Table 2-4 and Figure 2-2). For example, total municipal water use in the South Central Texas Region in 1990 was 318,495 acft/yr and is projected to increase to 769,523 acft/yr by 2050 (Table 2-4). The projected municipal water demand for individual counties in the region is shown in Table 2-4. Since Bexar County has the highest population, it also has the largest projected water demand, with almost 70 percent of the projected total water demand for the region by the year 2050 (Table 2-4 and Figure 2-2).
2.3 Industrial Water Demand Projections
The use of water for the production of goods for domestic and foreign markets varies widely among manufacturing industries in Texas. Manufactured products in Texas range from food and clothing to refined chemical and petroleum products to computers and automobiles. Some processes require direct consumption of water as part of the products being manufactured, while others require very little water consumption, but large volumes of water for cooling or cleaning purposes. Five manufacturing industries account for approximately 90 percent of water used by all manufacturing industries in Texas. These five water-intensive industries are chemical products, petroleum refining, pulp and paper, food and kindred products, and primary metals. The chemical and petroleum refining industries account for nearly 60 percent of the State’s annual manufacturing water use.
The South Central Texas Region’s major water using manufacturing sectors are fabricated metal products, industrial machinery, and food processing. All industries in the region used 67,016 acft of water in 1990 and are projected to have a demand of 202,379 acft/yr in 2050 (Table 2-5 and Figure 2-3). As can be seen in Figure 2-3, industrial water demand is projected to increase throughout the planning period.
2.4 Steam-Electric Power Water Demand Projections
Although Texas is the second most-populated state in the United States, it is the largest generator and consumer of electricity. It is also the largest user of coal-generated power. Power production in Texas is concentrated primarily in ten privately owned utilities, which account for 85 percent of production. Nine percent of power production is from facilities that are both publicly and privately held, while only 6 percent is from publicly owned utilities. The industry has faced and will continue to face significant changes in the structure of power generation. These changes range from new generation technology to government regulations on the marketing of electricity. These changes will not only have an impact on how and where power will be generated, but also on how water will be used in the process.
Only eight counties (Atascosa, Bexar, Calhoun, Frio, Goliad, Guadalupe, Hays, and Victoria) of the South Central Texas Region use water in steam-electric power production. In 1990, 43,451 acft of water was used for steam-electric power generation, and by the year 2050, it is estimated that 125,660 acft/yr of water will be needed for the production of steam-electric power (Table 2-6 and Figure 2-3).
2.5 Mining Water Demand Projections
Although the Texas mineral industry is foremost in the production of crude petroleum and natural gas in the United States, it also produces a wide variety of important non-fuel minerals. Texas is the only state to produce native asphalt and is the leading producer nationally of Frasch-mined sulfur. It is also one of the leading states in the production of clay, gypsum, lime, salt, stone, and aggregate. In the South Central Texas Region, the principal uses of water for mining are for the extraction of stone, clay, and petroleum and for sand and gravel washing.
In the region, total mining water demand was 7,799 acft in 1990 and is expected to increase to 14,308 acft/yr in 2050, an increase of over 80 percent (Table 2-7 and Figure 2-3).
2.6 Irrigation Water Demand Projections
Irrigated agriculture accounts for almost 65 percent of the total water used in the state. Currently, in Texas, approximately 10 million acre-feet (acft) of water is used to grow a variety of crops ranging from food and feed grains to fruits, vegetables, and cotton. Of this 10 million acft of water used for irrigation in Texas, groundwater is approximately 70 percent, and surface is 30 percent. The TWDB irrigation water use data show annual use for irrigation in the South Central Texas Region in 1990 of 669,440 acft/yr, or 6.7 percent of the total irrigation water used in Texas in 1990 (Table 2-8 and Figure 2-4). Projected irrigation water demands in the region in 2050 are 516,348 acft/yr, or 22.9 percent less than in 1990 (Table 2-8 and Figure 2-4)[1]. The projected decline is based upon increased irrigation efficiency, economic factors, and reduced government programs affecting the profitability of irrigated agriculture.
2.7 Livestock Water Demand Projections
Texas is the nation’s leading livestock producer, accounting for approximately 11 percent of the total United States production. Livestock production was valued at approximately $8 billion in 1993 and represented more than half of the total value derived from all agricultural operations in Texas. Cattle and calf operations dominate Texas livestock production, making up more than 75 percent of the livestock value. In 1993, there were approximately 14 million head of cattle and calves, 20 million chickens, 1.7 million head of sheep and lambs, and 0.5 million hogs and pigs. Although livestock production is an important component of the Texas economy, the industry consumes a relatively small amount of water. In 1990, total livestock production consumed approximately 274,000 acre-feet of water in Texas, representing less than two percent of the total water use.
In 1990, water use in the South Central Texas Region for livestock purposes was estimated at 24,400 acft/yr (Table 2-9 and Figure 2-5). The TWDB projections for livestock use in the region estimate that in the year 2000 livestock demand will be 28,186 acft/yr and in the year 2010 livestock demand will be 28,521 acft/yr. After the year 2010, it is projected that livestock demand will remain level throughout the planning period (Table 2-9 and Figure 2-5).
2.8 Total Water Demand Projections
Total water demand projections for the South Central Texas Region are the sum of water demand projections for municipal, industrial, steam-electric power generation, mining, irrigation, and livestock water demand projections (Tables 2-4, 2-5, 2-6, 2-7, 2-8, and 2-9), and are shown in Table 2-10 and Figure 2-6. Total water use in 1990 was 1,130,601 acft/yr (Table 2-10). Projected total water demand for the region is 1,503,848 acft/yr in 2030 and 1,656,739 acft/yr in 2050 (Table 2-10 and Figure 2-6). Projections of future water demands for municipal, industrial, steam-electric power, mining, and livestock increase while projections for irrigation decrease. The reasons for the decline in the projections of demand in future years for irrigation are predictions of increased efficiency in irrigation, economic factors adversely affecting the profitability of irrigation in future years, and expectations of decreased government programs supporting agricultural incomes.
Projections of future water demands for the South Central Texas Region show irrigation demand at 37.5 percent of total demand in 2030 and 31.2 percent in 2050 (Table 2-11). Municipal demand, as a percent of total demand, is projected to increase from 28.2 percent in 1990 to 41.6 percent in 2030 to 46.5 percent in 2050 (Table 2-11), with livestock demand as a percent of total demand decreasing from 2.2 percent in 1990 to 1.9 percent in 2030, and to 1.7 percent in 2050 (Table 2-11). Industrial water demand was 5.9 percent of total demand in 1990, and is projected to be 11.0 percent in 2030, and 12.2 percent in 2050 (Table 2-11). Steam-electric power demand increases from 3.8 percent of total demand in 1990 to 7.0 percent in 2030, and 7.6 percent in 2050 (Table 2-11).
2.9 Water Demand Projections for Counties and Parts of Counties of River and Coastal Basins of the South Central Texas Region
For purposes of this regional planning project, and in accordance with TWDB Rules, Section 357.7(a)(2), water demand projections are tabulated by river and coastal basin, county or part of county located within the river or coastal basin, and city and rural areas of each county or part of county for the South Central Texas Region (Table 2-12).[2] An illustration of how to read Table 2-12 is given below; however, the entire table will not be verbalized here. For example, a part of the rural area of Dimmit County is located in the Rio Grande River Basin. The projected 6 acft/yr of water demand for the people who live in this rural area is shown as municipal water demand (Table 2-12). There is no industry, steam-electric power, irrigation, or mining demand projected for that part of Dimmit County located in the Rio Grande River Basin. However, there is a livestock demand of 150 acft/yr (Table 2-12).
A part of Atascosa County is located in the Nueces River Basin, and a part is located in the San Antonio River Basin. That part located in the Nueces River Basin contains the cities of Charlotte, Jourdanton, Lytle, Pleasanton, and Poteet. In addition, rural areas of Atascosa County are located in the Nueces River Basin. The municipal water use by Charlotte in 1990 was 247 acft/yr, and projected municipal water demand in 2050 is 568 acft/yr (Table 2-12).
Likewise, water use in 1990 by Jourdanton was 670 acft/yr, with projected 2050 demands of 1,124 acft/yr (Table 2-12). Rural areas of Atascosa County located in the Nueces River Basin used 1,633 acft/yr for household purposes (municipal type of water use), with projections in 2050 of 4,100 acft/yr (Table 2-12).
There is no industrial demand in Atascosa County in the Nueces River Basin. However, there was an estimated 6,036 acft/yr of water used for steam-electric power in 1990, with projected steam-electric power water demand in 2050 of 22,000 acft/yr (Table 2-12). Irrigation water demand in Atascosa County in the Nueces River Basin is projected to decrease from 45,792 acft/yr in 1990 to 41,900 acft/yr in 2050 (Table 2-12).
Total water use in Atascosa County in the Nueces River Basin in 1990 was 59,619 acft/yr, with projected total water demand for this same area at 79,445 acft/yr in 2050 (Table 2-12).
The reader can see the projections for each county or part of county of each respective river or coastal basin of the region in Table 2-12. Total projections for counties and parts of counties of each river and coastal basin area located in the South Central Texas Region are shown at the end of the listing of individual counties and parts of counties of each river or coastal basin. In addition, the basin totals are listed at the end of Table 2-12. For example, total water use in 1990 in the Nueces River Basin part of the South Central Texas Planning Region was 582,121 acft/yr, of which 24,157 acft/yr was for municipal purposes, 2,152 acft/yr was for industrial purposes, 6,074 acft/yr was for steam-electric power purposes, 539,759 acft/yr was for irrigation, 2,212 acft/yr was for mining, and 7,767 acft/yr was for livestock (Page 2-35). Projected water demand for the Nueces River Basin part of the planning region in 2050 is 514,162 acft/yr, with 42,873 acft/yr being for municipal demand, 3,157 acft/yr being for industry, 22,400 acft/yr being for steam-electric power, 432,753 acft/yr being for irrigation, 4,037 acft/yr being for mining, and 8,942 acft/yr being for livestock (Page 2-35). The reader can readily see the projections, by type of demand, for the Rio Grande, Nueces, San Antonio, Guadalupe, Lower Colorado, and Lavaca River Basins as well as for the Colorado-Lavaca, Lavaca-Guadalupe, and San Antonio-Nueces Coastal Basin areas of the South Central Planning Region in Table 2-12, Page 2-45.
Total water use in the South Central Texas Region was 1,130,601
acft/yr in 1990, with projected 2050 water demands of 1,656,739 acft/yr (Page
2-46). The quantity of projected water
demands in 2050 are 157 acft/yr for the Rio Grande River Basin, 514,162 acft/yr
for the Nueces River Basin, 732,771 acft/yr for the San Antonio River Basin,
258,570 acft/yr for the Guadalupe River Basin, 352 acft/yr for the Lower
Colorado River Basin, 1,238 acft/yr for the Lavaca River Basin, 31,138 acft/yr
for the Colorado-Lavaca Coastal Basin, 116,140 acft/yr for the
Lavaca-Guadalupe Coastal Basin, and 2,211 acft/yr for the San Antonio-Nueces
Coastal Basin (Page 2-47).
2.10 Water Demand Projections for Major Water Providers in the South Central Texas Region
The Texas Water Development Board’s (TWDB) definition of a Major Water Provider (MWP) is as follows:
“A MWP is an entity, which delivers and sells a significant amount of raw or treated water for municipal and/or manufacturing use on a wholesale and/or retail basis. The entity can be public or private (non-profit or for-profit). Examples include municipalities with wholesale customers, river authorities, and water districts.”
It is the intent that the RWPG plan: “1) for each water user that contracts with a wholesale water supplier, and 2) for the wholesale supplier that is defined as a MWP.” “31 TAC Chapter 357.7(a) requires: 1) the presentation of current and projected population and water demands, 2) evaluation of current water supplies available, and 3) water supply and demand analysis respectively be reported for the MWPs. 31 TAC Chapter 357.7(a)(1) requires that the regional water plans describe the MWPs and Appendix B to the contract between the TWDB and the San Antonio River Authority (political subdivision for the South Central Texas Region) states that the definition of a MWP will be determined by the RWPG based on the characteristics and needs of the region.”
At its meeting on April 13, 1999 the SCTRWPG decided that a Major Water Provider (MWP) is an entity that has commitments to provide 500 acre-feet or more of raw or treated water for municipal and/or manufacturing use, on a wholesale or retail basis, to water users other than its own direct customers. Under this definition, the list of MWPs for the South Central Texas Region is as follows:
San
Antonio Water System (SAWS)
Wholesale
Accounts:
1) City of Elmendorf (2 taps)
2) Palm Park Water Co. (1 tap)
3) East Central Water Supply Co. (2 taps)
Cities Served by SAWS:
1) San Antonio
2) Balcones Heights
3) Terrell Hills
4) Olmos Park
5) Castle Hills (approximately 20 taps – rest served by Bexar Metropolitan Water Dist.)
6) China Grove
7) Live Oak (approximately 800 taps – rest served by City of Live Oak)
8) Hollywood Park (approximately 30 taps – rest served by Bexar Metropolitan W Dist.)
9) Leon Valley (approximately 30% of city – rest served by City of Leon Valley)
10) Helotes
Bexar Metropolitan Water District (BMWD)—(Retail)
Cities Served by BMWD
1) Bulverde Utility Company
2) Castle Hills
3) Hill Country Village (Stone Oak)
4) Hollywood Park
5) Somerset (with Southside subdivisions)
Subdivisions Served by BMWD
1) Southside
2) Northwest
3) Northeast
4) Texas Research Park
5) Cagnon Road
6) Chaparral
7) Hickory
8) Kingspoint
9) Palo Alto Park (Shalomar)
10) Silver Mountain
11) South Oaks
12) Twin Valley
13) Waterwood (1 and 2)
14) Windy’s
15) Primrose
16) Oak South
17) Hidden Springs
18) Elm Valley
19) Timberwood Park
20) North San Antonio Hills
Wholesale Customers Served by BMWD
1) East Central Water Supply Corporation
2) Green Valley Special Utility District
3) Springs Hill Water Supply Corporation
4) City of LaCoste
Canyon Regional Water Authority
1) Crystal Clear Water Supply Corporation
2) Springs Hill Water Supply Corporation
3) Green Valley Special Utility District
4) East Central Water Supply Corporation
5) City of Marion
6) City of Cibolo
7) City of La Vernia
8) Maxwell Water Supply Corporation
9) Martindale Water Supply Corporation
10) County Line Water Supply Corporation
11) Bexar Metropolitan Water District
Guadalupe-Blanco River Authority
1) B. P. Chemical Company
2) Calhoun County Rural Water Supply System
3) Canyon Lake Water Supply Corporation
4) Canyon Regional Water Authority
5) Central Power and Light Company
6) City of Kyle
7) City of Luling
8) City of Port Lavaca
9) City of San Marcos
10) City of Seguin
11) Crystal Clear Water Supply Corporation
12) Gonzales County Water Supply Corporation
13) ISP Technologies
14) New Braunfels Utilities
15) Seadrift Coke, L.P.
16) Southwest Texas State University
17) Springs Hill Water Supply Corporation
18) Standard Gypsum
19) Structured Metals, Inc.
20) Rice Farmers
21) Union Carbide Corporation
22) Panda Guadalupe Power
23) City of San Antonio
24) San Antonio River Authority
25) Bexar Metropolitan Water District
26) Maxwell Water Supply Corporation
27) County Line Water Supply Corporation
28) Green Valley Special Utility District
New Braunfels Utilities
1) City of New Braunfels
2) Springs Hill Water Supply Corporation
3) Crystal Clear Water Supply Corporation
4) Green Valley Special Utility District
City of San Marcos
1) City of San Marcos
2) Southwest Texas State University
3) Texas Education Foundation
2.10.1 San Antonio Water System (SAWS)
The San Antonio Water System (SAWS) provides wholesale water supplies to three utility systems, retail water supplies to nine suburban municipalities, and retail water supplies for most, but not all, of the City of San Antonio. SAWS is the sole water provider for the Cities of Elmendorf, Balcones Heights, China Grove, Helotes, Olmos Park, Terrell Hills, and Palm Park Water Co., and provides part of the water supply for East Central WSC, Leon Valley, Live Oak, and San Antonio. In addition to these customers, Castle Hills and Hollywood Park are customers of SAWS, but have not historically obtained water from this source and are shown in Table 2-13 with a projected demand from SAWS of zero.
As noted in the preceding paragraph, several of SAWS’ customers also obtain water from other Major Water Providers (MWP) or supply a portion of their own water. East Central WSC is a customer of BMWD and CRWA, although historically East Central WSC has not obtained water from BMWD. Leon Valley and Live Oak both obtain water from SAWS and also supply a portion of their own water (Table 2-13). The total amount of water supplied by SAWS in 1990 was 173,087 acft, all of which was for municipal purposes (Table 2-13). The total amount of water needed by SAWS to meet its customers’ projected demands in 2030 is 322,846 acft/yr and in 2050 is 403,397 acft/yr (Table 2-13).
2.10.2 Bexar Metropolitan Water District (BMWD)
The Bexar Metropolitan Water District (BMWD) has wholesale water connections with four utility systems (City of LaCoste, East Central WSC, Green Valley SUD, and Springs Hill WSC), and has historically been the sole water supplier for the Bulverde Utility Company, the Cities of Castle Hills, Hill County Village/Hollywood Park, Somerset, and 20 subdivisions within Bexar County. BMWD is projected to supply a portion of the City of LaCoste’s water demands in the future. In addition to these customers East Central WSC, Green Valley SUD, and Springs Hill WSC are customers of BMWD, but have not historically obtained water from this source and are shown in Table 2-13 with a projected demand from BMWD of zero. The total amount of water supplied by BMWD in 1990 was 24,536 acft, all of which was for municipal purposes (Table 2-13). The total amount of water needed by BMWD to meet its customers’ projected demands in 2030 is 51,914 acft/yr and in 2050 is 63,490 acft/yr (Table 2-13).
2.10.3 Canyon Regional Water Authority (CRWA)
Canyon Regional Water Authority (CRWA) is a water planning and development agency for water purveyors that serve large areas of Guadalupe County, and portions of Bexar, Hays, Wilson, and Comal Counties. In addition to serving as a planning and development agency for its 11 member entities, CRWA provides part of the water supply for Crystal Clear WSC, Springs Hill WSC, Green Valley SUD, and East Central WSC and provides water to meet all of the City of Cibolo’s demands. The total amount of water supplied by CRWA for 1990 was 291 acft, all of which was for municipal purposes. The total amount of water needed by CRWA to meet its customers’ projected demands in 2030 is 6,675 acft/yr, with 6,662 acft/yr being for municipal purposes, and 13 acft/yr being for industrial purposes, and 9,557 acft/yr in 2050, with 9,542 acft/yr being for municipal purposes, and 15 acft/yr being for industrial purposes (Table 2-13). CRWA is projected to supply a portion of the water demands for the City of La Vernia, County Line WSC, Martindale WSC, and Maxwell WSC in the future (Table 2-13). In addition to these customers, the City of Marion, and BMWD’s Northeast Service Area are customers of CRWA, but have not historically obtained water from this source and are shown in Table 2-13 with a projected demand from CRWA of zero.
As noted in the preceding paragraph, several of CRWA’s customers also obtain water from other sources. Crystal Clear WSC is a customer of GBRA and New Braunfels Utilities; Springs Hill WSC is a customer of BMWD, GBRA, and New Braunfels Utilities (Springs Hill historically has not obtained water from BMWD); Green Valley SUD is a customer of BMWD, GBRA, and New Braunfels Utilities (Green Valley historically has not obtained water from BMWD or GBRA); East Central WSC is a customer of SAWS and BMWD (East Central historically has not obtained water from BMWD) (Table 2-13). In addition, Crystal Clear WSC, Springs Hill, and Green Valley SUD supply a portion of their own water.
Two of CRWA’s customers (Green Valley SUD and Springs Hill WSC) are projected to utilize water received from CRWA for industrial purposes over the planning period (Table 2-13).
2.10.4 Guadalupe-Blanco River Authority (GBRA)
The Guadalupe-Blanco River Authority (GBRA) supplies potable water and raw water for municipal, industrial, irrigation, and steam-electric purposes through management of substantial quantities of run-of-river rights and storage rights in Canyon Reservoir. As of July 1999, the Authority had contracts to provide water to 28 public and private entities, although historically GBRA in and of itself has only been called upon to meet the water demands, either in part or in whole, of Calhoun County RWSC, Canyon Lake WSC, CRWA, Central Power and Light, City of Luling, City of Port Lavaca, Crystal Clear WSC, rice farmers in Calhoun County, Gonzales County WSC, New Braunfels Utilities, Springs Hill WSC, Standard Gypsum, and Structured Metals, Inc. The total amount of water supplied by GBRA in 1990 was 56,989 acft, of which 17,683 acft was for municipal purposes, 1,885 acft was for industrial purposes, 2,000 acft was for steam-electric power purposes, and 35,421 acft was for irrigation purposes (Table 2‑13). The total amount of water needed by GBRA to meet its customers’ demands and current contract amounts in 2030 is 68,015 acft/yr, with 32,243 acft/yr being for municipal purposes, 7,259 acft/yr being for industrial purposes, 10,840 acft/yr being for steam-electric power purposes, and 17,673 acft/yr being for irrigation purposes (Table 2-13). The total amount of water needed by GBRA to meets its customers’ projected demands and current contract amounts in 2050 is 65,945 acft/yr, with 32,818 acft/yr being for municipal purposes, 7,259 acft/yr being for industrial purposes, 10,840 acft/yr being for steam-electric power purposes, and 15,028 acft/yr being for irrigation purposes (Table 2-13).
In addition to those customers whom GBRA has historically supplied water, B.P. Chemical Company, BMWD, City of San Antonio, City of Seguin, County Line WSC, Green Valley SUD, ISP Technologies, Maxwell WSC, San Antonio River Authority, Seadrift Coke, L.P., and Union Carbide Corporation are customers of GBRA, but have not historically obtained water from this source; however, these entities do have contracts with GBRA and those contract amounts have been included in Table 2-13.
Several of GBRA’s customers obtain water from other sources. Crystal Clear WSC is a customer of CRWA and New Braunfels Utilities, and Springs Hill WSC is a customer of BMWD, CRWA, and New Braunfels Utilities (Springs Hill historically has not obtained water from BMWD) (Table 2-13). In addition, Canyon Lake WSC, City of Luling, City of Port Lavaca, Crystal Clear WSC, Gonzales County WSC, New Braunfels Utilities, and Springs Hill WSC supply a portion of their own water.
Six of GBRA’s customers (Calhoun County RWSC, City of Port Lavaca, New Braunfels Utilities, Springs Hill WSC, Standard Gypsum, and Structured Metals, Inc.) are projected to utilize water received from GBRA for industrial purposes over the planning period (Table 2-13). In addition, three of GBRA’s customers (American Electric Power (formerly Central Power & Light Company), Panda Guadalupe Power, and the City of Seguin) are projected to utilize water received from GBRA for steam-electric power purposes over the planning period (Table 2-13).
2.10.5 New Braunfels Utilities (NBU)
New Braunfels Utilities supplies water to the City of New Braunfels and two utilities (Crystal Clear WSC, and Green Valley SUD) that serve neighboring areas. The total amount of water supplied by NBU in 1990 was 2,277 acft, of which 2,225 acft was for municipal purposes, and 52 acft was for industrial purposes (Table 2-13). The total amount of water needed by NBU to meet its customers’ projected demands in 2030 is 14,837 acft/yr, with 14,837 acft/yr being for municipal purposes and 135 acft/yr being for industrial purposes, and 22,202 acft/yr in 2050, with 22,025 acft/yr being for municipal purposes and 177 acft/yr being for industrial purposes (Table 2-13).
New Braunfels Utilities, Springs Hill WSC, Crystal Clear WSC, and Green Valley SUD also obtain water from other sources. Springs Hill WSC is a customer of BMWD, CRWA, and GBRA (Springs Hill historically has not obtained water from BMWD, and is projected to depend upon NBU as an emergency source of water only); Crystal Clear WSC is a customer of CRWA and GBRA; Green Valley SUD is a customer of BMWD, CRWA, and GBRA (Green Valley historically has not obtained water from BMWD or GBRA); and New Braunfels Utilities is a customer of GBRA (Table 2-13). In addition to these addition water supplies, all of these entities supply a portion of their own water.
Two of NBU’s customers (City of New Braunfels and Green Valley SUD) are projected to utilize water obtained from NBU for industrial purposes over the planning period (Table 2‑13).
2.10.6 City of San Marcos
In addition to supplying water to the permanent residents of San Marcos, the City supplies water to Southwest Texas State University (SWTSU) and the Texas Education Foundation. The total amount of water supplied by the City of San Marcos in 1990 was 6,686 acft, of which 6,629 acft was for municipal purposes, and 57 acft was for industrial purposes (Table 2-13). The total amount of water needed by the City to meet its customers’ demands in 2030 is 14,844 acft/yr, with 14,422 acft/yr being for municipal purposes, and 422 acft/yr being for industrial purposes, and 27,358 acft/yr in 2050, with 26,883 acft/yr being for municipal purposes, and 475 acft/yr being for industrial purposes (Table 2-13). Both the City of San Marcos and SWTSU obtain water from GBRA as well as supply a portion of their own water (Table 2-13).
Only one of the City of San Marcos’ customers (SWTSU) is projected to utilize water obtained from the City for industrial purposes over the planning period, however, the City is projected to supply water to industrial customers located within the City through its retail distribution system.
