Schertz projects about 2,500 acre-feet of additional water need around 2070 as the cities prepare to discuss possible CVLGC asset transactions at an Oct. 22 joint workshop.
The Schertz future-water slide puts that need under expected growth; the joint workshop agenda schedules a discussion of the cities' water portfolios and possible asset-transaction framework.
The puzzle is that the cities' numbers answer different questions. Schertz estimates additional supply it may need decades from now. Cibolo's consultant sets out its current supply and use, then projects shortages under one future scenario. Adding those figures would make a single regional deficit that neither document calculates.
What the forecasts measure
The Cibolo consultant summary puts present annual supply at 3,800 acre-feet and approximate current use at 2,550 acre-feet. In its TWDB scenario, the summary projects shortages of 93 acre-feet in 2050, 738 in 2060, 1,476 in 2070 and 2,321 in 2080. It also sketches a separate full-CCN-buildout need of 1,000 additional acre-feet a year. That buildout estimate is a different scenario, not another amount to stack on the TWDB shortage.
| City and measure | Year or period | Acre-feet |
|---|---|---|
| Schertz: additional need under expected growth | Around 2070 | About 2,500 |
| Cibolo: annual supply | Present | 3,800 |
| Cibolo: approximate annual use | Present | 2,550 |
| Cibolo: TWDB scenario shortage | 2050 | 93 |
| Cibolo: TWDB scenario shortage | 2060 | 738 |
| Cibolo: TWDB scenario shortage | 2070 | 1,476 |
| Cibolo: TWDB scenario shortage | 2080 | 2,321 |
| Cibolo: separate full-CCN-buildout additional need | Buildout scenario | 1,000 per year |
Sources: Schertz future-water slide and Cibolo consultant summary. The scenarios are not additive.
