Howard Slobodin: Agency Rulemaking Update, TWCA Fall Conference 2015
John Dupnik: Managing to the Desired Future Condition, TWCA Fall Conference 2015
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S Managing to the Desired Future Condition John T. Dupnik, P.G. General Manager Barton Springs/Edwards Aquifer Conservation District TWCA Fall Conference 2015 October 16, 2015
Transcript of John Dupnik: Managing to the Desired Future Condition, TWCA Fall Conference 2015
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Managing to the Desired Future Condition
John T. Dupnik, P.G.General Manager
Barton Springs/Edwards Aquifer Conservation District
TWCA Fall Conference 2015October 16, 2015
Barton Springs and the Edwards Aquifer
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2004 - Sustainable Yield Study
1:1 pumping to springflow relationship
Under DOR with uncurtailed pumping: Barton Springs may
cease flowing 19% of the wells in
the District may go dry
DOR
Conditional (Interruptible) Permits
Non-Drought Extreme Drought
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H
C
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50%
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100%
No Drought
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Extreme Drought
E
Management Zones
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DFC Determination
Management Goals: Sustainable yield Preserve minimum spring
flows Preserve water well
supplies Allow reasonable non-
drought pumpage Drought DFC:
“minimum of 6.5 cfs of springflow during recurrence of DOR conditions”
ERP Curtailments: Historical = 50% Conditional = 100%
DOR
6.5
HB 3405 (2015)
Response to large GW project (2-5x MAG)
Expanded BSEACD
Permit Process1. Temp Permits2. Regular Permits
Maximum Production Capacity
Permit reductions if affects:1. Existing Wells, or2. DFC
“allow for an increase in average drawdown of approximately 30 feet through 2060 consistent with "Scenario 6" in TWDB Draft GAM Task 10-005”
Take Aways Aquifer science is evolving
DFC process is iterative/Permitting must be adaptable
Engage with GCDs on local solutions Set Management Zones (springsheds, aquifer
subdivisions) MZ’s foundation for GMA subdivisions
Improve GMAs regional planning (DFCs) Refine the GAMs Broader stakeholder interest More GMA oversight
