5.3.3 Caldwell County Water Supply Plan
Table 5.3.3-1 lists each water user group in Caldwell County and their corresponding surplus or shortage in years 2030 and 2050. For each water user group with a projected shortage, or need, a water supply plan has been developed and is presented in the following subsections.
Table 5.3.3-1.
Caldwell County Surplus/Shortage
|
Water
User Group |
Surplus/Shortage1 |
Comment |
|
|
2030 |
2050 |
||
|
City of Lockhart |
-668 |
-737 |
Projected shortage – see plan below |
|
City of Luling |
585 |
10 |
Projected surplus |
|
City of Martindale |
149 |
135 |
Projected surplus |
|
Rural Area Residential and Commercial |
383 |
1,173 |
Projected surplus |
|
Industrial |
10 |
0 |
Projected surplus |
|
Steam-Electric Power |
0 |
0 |
No projected demand |
|
Mining |
0 |
0 |
No projected surplus/shortage |
|
Irrigation |
72 |
68 |
Projected surplus |
|
Livestock |
0 |
0 |
No projected surplus/shortage |
|
1 From Table 4-3,
Section 4.1 – Water Needs Projections by Water User Group. |
|||
5.3.3.1 City of Lockhart
The City of Lockhart’s current water supply is obtained from the Carrizo Aquifer. The City of Lockhart is projected to need additional water supplies beginning in the planning year 2010. The following options were considered to meet the city’s projected need:
§ Demand Reduction (Conservation) (L-10 Mun.)
§ Carrizo Aquifer – Local Supply (SCTN-2a)
§ Lockhart Reservoir (G-21) (See Section 6.2.2)
Working within the planning criteria established by the SCTRWPG and the TWDB, it is recommended that the City of Lockhart implement the following water supply plan to meet the projected need for the city (Table 5.3.3-2).
§ Municipal demand reduction (conservation) to be implemented in 2000. This project can provide an additional 91 acft/yr of supply in 2000, decreasing to 0 acft/yr of additional supply in 2050. (See Section 6, Supplement 2 and Volume III, Section 1.1).
§ Carrizo Aquifer – Local Supply (SCTN-2a) to be implemented in 2010. This project can provide an additional 500 acft/yr of supply in 2010 and 2020 and an additional 1,000 acft/yr of supply from 2030 through 2050.
Table 5.3.3-2.
Recommended Water Supply Plan for the City of Lockhart
|
|
2000
(acft/yr) |
2010
(acft/yr) |
2020
(acft/yr) |
2030
(acft/yr) |
2040
(acft/yr) |
2050
(acft/yr) |
|
Projected Need (Shortage) |
0 |
188 |
393 |
668 |
714 |
737 |
|
Recommended Plan |
|
|
|
|
|
|
|
Demand Reduction (Conservation) (L-10 Mun.) |
91 |
91 |
91 |
0 |
0 |
0 |
|
Carrizo Aquifer – Local Supply (SCTN-2a) |
|
500 |
500 |
1,000 |
1,000 |
1,000 |
|
Total New Supply |
91 |
591 |
591 |
1,000 |
1,000 |
1,000 |
The costs of the recommended plan to meet the City of Lockhart’s projected need are shown in Table 5.3.3-3.
Table 5.3.3-3.
Recommended Plan Costs by Decade for the City of Lockhart
|
Plan
Element |
2000 |
2010 |
2020 |
2030 |
2040 |
2050 |
|
Demand Reduction
(Conservation) (L-10 Mun.) |
|
|
|
|
|
|
|
Annual Cost ($/yr) |
$36,491 |
$36,491 |
$36,491 |
$0 |
$0 |
$0 |
|
Unit Cost ($/acft) |
$401 |
$401 |
$401 |
$0 |
$0 |
$0 |
|
Carrizo Aquifer – Local
Supply (SCTN-2a) |
|
|
|
|
|
|
|
Annual Cost ($/yr) |
|
$487,000 |
$487,000 |
$974,000 |
$938,500 |
$938,500 |
|
Unit Cost ($/acft) |
|
$974 |
$974 |
$974 |
$939 |
$939 |
5.3.3.2 City of Luling
The City of Luling is projected to have adequate water supplies available from the Carrizo Aquifer and run-of-river rights to meet the city’s projected demand during the planning period.
Working within the planning criteria established by the SCTRWPG and the TWDB, it is recommended that the City of Luling implement the following water supply plan (Table 5.3.3-4).
§ Municipal demand reduction (conservation) to be implemented in 2000. This project can provide an additional 94 acft/yr of supply in 2000, increasing to 104 acft/yr of additional supply in 2050. (See Section 6, Supplement 2 and Volume III, Section 1.1).
Table 5.3.3-4.
Recommended Water Supply Plan for the City of Luling
|
|
2000
(acft/yr) |
2010
(acft/yr) |
2020
(acft/yr) |
2030 |
2040
|
2050 |
|
Projected Need (Shortage) |
0 |
0 |
0 |
0 |
0 |
0 |
|
Recommended Plan |
|
|
|
|
|
|
|
Demand Reduction (Conservation) (L-10 Mun) |
94 |
105 |
117 |
82 |
93 |
104 |
|
Total New Supply |
94 |
105 |
117 |
82 |
93 |
104 |
The costs of the recommended plan for the City of Luling are shown in Table 5.3.3-5.
Table 5.3.3-5.
Recommended Plan Costs by Decade for the City of Luling
|
Plan
Element |
2000 |
2010 |
2020 |
2030 |
2040 |
2050 |
|
Demand Reduction
(Conservation) (L-10 Mun) |
|
|
|
|
|
|
|
Annual Cost ($/yr) |
$44,931 |
$44,931 |
$44,931 |
$26,485 |
$26,485 |
$26,485 |
|
Unit Cost ($/acft) |
$478 |
$428 |
$384 |
$323 |
$285 |
$255 |
5.3.3.3 City of Martindale
The City of Martindale is projected to have adequate water supplies available from Canyon Reservoir and run-of-river rights to meet the city’s projected demand during the planning period.
Working within the planning criteria established by the SCTRWPG and the TWDB, it is recommended that the City of Martindale implement the following water supply plan (Table 5.3.3-6).
§ Municipal demand reduction (conservation) to be implemented in 2000. This project can provide an additional 10 acft/yr of supply in 2000, decreasing to 0 acft/yr of additional supply in 2050. (See Section 6, Supplement 2 and Volume III, Section 1.1).
Table 5.3.3-6.
Recommended Water Supply Plan for the City of Martindale
|
|
2000
(acft/yr) |
2010
(acft/yr) |
2020
(acft/yr) |
2030 |
2040
|
2050 |
|
Projected Need (Shortage) |
0 |
0 |
0 |
0 |
0 |