City Council August 21, 2012 Water

City Council Meeting August 21, 2012

Kickapoo Creek Crossing

Twin Buttes South Pool Pumping

Flow Information

• S Pool Pumping Rate 77 A-F/Day

• Flow into North Pool 55-60 A-F/Day

• Flow into Nasworthy 15-25 A-F/Day

South Pool Summary

• Releases (pumped) - 1,078 A-F• Evaporation -192 A-F

Net Change -1,270 A-F

Elevation Change 3’ Down

North Pool Summary

• Inflow + 812 A-F• Releases -308 A-F• Evaporation -142 A-F

Net Change +362 A-F

Elevation change 6” Increase

Lake Nasworthy Summary

• Inflow +308 A-F• Releases -376 A-F• Evaporation -178 A-F

Net Change -246 A-F

Elevation change 5” Down

Lake Levels

• Changes in Reservoir Contents since August 3

South Pool -1,270 A-F 3’ Drop North Pool +362 A-F 6” Rise Lake Nasworthy -246 A-F 5” Drop

ADDITIONAL WATER SUPPLY

Hickory Well Field Expansion

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

2025

2026

2027

2028

2029

2030

2031

2032

2033

2034

2035

2036

2037

2038

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

6 mgd usage

Well Field Banking and Allocation Chart Based on 6 mgd Usage

Banked Water

Allocated Usage

2013

2014

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

2025

2026

2027

2028

2029

2030

2031

2032

2033

2034

2035

2036

2037

2038

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

9 mgd usage2014 - 2018

Well Field Banking and Allocation Chart Based on 9 mgd Usage

Banked Water

Allocated Usage

Hickory Well Field Layout

Cost Estimate to Expand to 9 mgd Capacity• Well Field:

$10,720,000• 5 New Wells Drilled, Equipped• Well Field Collector Pipes & Roads

• Booster Pump Station: $ 260,000• 1 Additional Pump and Electrical

• Contingencies: $ 2,920,000

• Engineering and Construction Mgmt. $ 2,160 000

• Total $16,060,000

Draft Schedule• Environmental Assessment 3 months

• State and Federal Agency Review 3-4 months

• Prepare Plans and Specs/Bid Project 5 months

• TCEQ & TWDB Review 2 months

• Construction 8-12 months

Water Advisory Recommendation

• Expand the well field with the installation of 7 wells, pumps, collector pipes, roads, electrical

• Expand booster pump station by 3 mgd (1 pump)

• Utilize uncommitted construction funds estimated to be $15 million

• 5 wells-$16 million; 7 wells-$19 million

Drought Level III Projection

Projected Water Supply

Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sept Oct0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

IvieSupply

Depleted

DroughtLevel III

Month

Pro

ject

ed S

up

ply

, Acr

e-F

eet

Stage III Water Use Restrictions

• No watering of lawns, shrubs, gardens, golf courses

• City Council may designate days and times for hand watering of trees and foundations

• No filling or refilling of swimming pools or fountains

• No washing of vehicles except as needed for public health, safety and welfare

Water Usage Surcharges

• Residential accounts- $6.00/1,000 gallons for usage over 10,000 gallons

• Apartments- $5.00/1,000 gallons for usage over 3,000 gallons/apartment unit

• All other accounts- $2.50/1,000 gallons

Water Distribution System

Distribution System Operation

• System Flushing- Rusty Water & Water Quality

• Water Quality- Maintain Chlorine Residual

• Increased Flushing Due to Hot Weather & Lower Usage

Water Disinfection

• Current Disinfection Method Chloramine- Chlorine combined with Ammonia is

added to treated water

• Other Approved Disinfection MethodFree Chlorine- Chlorine gas is added to treated water

System Operational Change

• Switch Disinfectant to Free Chlorine

• Monitor Dispersion of Free Chlorine thru System

• Continue Free Chlorination thru October

Public Notices

• Press Releases, City Web Site

• Written notice to specific customers -Hospitals-Dialysis Units-Pet Stores for aquariums

Water Aesthetics

• Changes that may be observed -Chlorine smell-Fishy smell-Cloudy/Colored appearance

• Symptoms do not affect safety of the water

Schedule

• Begin Free Chlorination August 21

• Complete Chlorination October 31

City Council Meeting August 21, 2012