Managing Growth and Future Water Needs

Ian Taylor, CEO, New Braunfels Utilities

Population Growth

ForecastsWater Demand

Projections

Comparison of

Supply & DemandSources of

Additional Supply

Aquifer Storage and

Recovery

Questions

Discussion Topics

Current Water Supplies - Surface Water

Current Water Supplies - Groundwater

Population Growth Forecasts

6% Growth

3% Growth

Water Demand Projections

Forecasted Population

Capita

Total Annual

Demand

Gallons per Day (Converted to AFY)

Unit Demand

Gallons per Capita per Day (gpcd)

Unit Demand Reduction will be Achieved by

Enhancing NBU’s Existing Effective Programs

0

10,000

20,000

30,000

40,000

50,000

An

nu

al D

em

an

d (

AF

Y)

Year

Water Demand Projections

41,720

29,775

Sources of Additional Supply

• NBU multi-phased ASR project✓Phase 1: Feasibility study

➢ Recommended storage in brackish Edwards Aquifer at or near New Braunfels Regional Airport

✓Phase 2: TWDB-funded data collection in brackish “Saline Zone” of Edwards Aquifer➢ ILA with EAA for ongoing cooperation, monitoring and approvals➢ Wireline coring to depth of 1,100 feet➢ Monitor/WQ sampling well to depth of 940 feet

• Phase 3: Permitting, design and construction ➢ First full-scale ASR well➢ Monitoring wells for NBU operations and EAA data collection➢ O&M manual and training

• Phase 4: Startup and cycle testing

Aquifer Storage and Recovery (ASR)

Technology - storage of water underground in a suitable aquifer when water is available; recovery of that water during drought and peak demand periods. Typically recharge and recovery from same well.

• NBU 2019 Legislative effort in cooperation with EAA• Amend EAA Act and Chapter 27 of Texas Water Code

• Currently only Edwards water can be recharged into Edwards Aquifer

• Legislation will allow NBU and others to recharge “freshwater” into Saline Zone

• Freshwater includes blended surface and ground water from NBU public water system

• Freshwater does not include treated wastewater or reclaimed water

Aquifer Storage and Recovery (ASR)

Questions?