Micah Voulgaris

1. DFC Tracking
Cow Creek Groundwater
Conservation District
Micah Voulgaris

2. GMA-9 Adopted Desired Future Conditions
(Major and Minor Aquifers)
Trinity Allow For An Increase in Average Drawdown of Approximately 30 Feet
Through 2060 (throughout GMA-9) Consistent With “Scenario 6” in TWDB GAM
Task 10-005
Edwards-Trinity (Plateau) Allow For No Net Increase in Average Drawdown in
Bandera and Kendall Counties through 2070
Ellenburger-San Saba Allow For An Increase in Average Drawdown of No
More Than 2 Feet in Kendall County through 2070
Hickory Allow For An Increase in Average Drawdown of No More Than 7 Feet in
Kendall County through 2070

3. Trinty DFC
• Trinity Allow For An Increase in Average
Drawdown of Approximately 30 Feet Through
2060 (throughout GMA-9) Consistent With
“Scenario 6” in TWDB GAM Task 10-005

4. Source: TWDB

5. 1217.92
1181.07
1214.54
1172.48
1178.94
1214.05
1208.97
1100.00
1150.00
1200.00
1250.00
1300.00
1350.00
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
January-2008
May-2008
September-2008
January-2009
May-2009
September-2009
January-2010
May-2010
September-2010
January-2011
May-2011
September-2011
January-2012
May-2012
September-2012
January-2013
May-2013
September-2013
January-2014
May-2014
September-2014
January-2015
May-2015
September-2015
January-2016
May-2016
September-2016
January-2017
Rainfall Average Level Linear (Average Level)
Monthly Average (Trinity)

6. 1170.00
1180.00
1190.00
1200.00
1210.00
1220.00
January Feburary March April May June July August September October November December
Avg.
Monthly
Level
Avg.
Levels
for 2008
Avg.
Levels
for 2009
Avg.
Levels
for 2010
Avg.
Levels
for 2011
Avg.
Levels
for 2012
Avg.
Levels
for 2013
Avg.
Levels
for 2014
Avg.
Levels
for 2015
Avg.
Levels
for 2016
Avg.
Levels
for 2017

7. 14.74
32.65
42.06
16.98
29.74 29.04
25.62
49.80
40.77
0.00
1170.00
1175.00
1180.00
1185.00
1190.00
1195.00
1200.00
1205.00
1210.00
1215.00
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
Yearly Levels 2008-2017
Yearly Rainfall Yearly Averages Linear (Yearly Averages) Linear (Yearly Averages)

8. Pumping vs. Permitted
• Trinity MAG of about 11,000 AF
• Current permitted non-exempt use of about
4,880 AF
• On average, pumping is only about 36% of the
permitted use or about 1750 AF

9. Source: TWDB

10. manager@ccgcd.org