City of San Angelo Water Forum

August 30, 2012

CITY OF SAN ANGELOWATER SOURCES

HICKORY AQUIFER

O.H. IVIE

TWIN BUTTES

LAKE NASWORTHY

OC FISHER

EV SPENCE

EDENMELVIN

CHRISTOVAL

PAINT ROCK

ROBERT LEE

GRAPE CREEK

SAN ANGELO

BALLINGER

BRADY

San Angelo

Robert Lee

Eldorado

Big Lake

Sterling City

RankinMertzon

BarnhartChristoval

Garden City

Grape Creek

TWIN BUTTES WATERSHED

TWIN BUTTES RESERVOIR

San Angelo

Ballinger

Mertzon

Eden

Paint Rock

Christoval

Grape Creek

LAKE NASWORTHY WATERSHED

LAKE NASWORTHY

San Angelo

Big Spring

Stanton

Robert Lee

Sterling City

Mertzon

GardenCity

Grape Creek

O. C. FISHER WATERSHED

O. C. FISHER RESERVOIR

Big Spring

Colorado CitySweetwater

Sterling City

San Angelo

Robert Lee

Ballinger

Winters

Grape Creek

E V SPENCE WATERSHED

E V SPENCE RESERVOIR

San Angelo

Sterling CityRobert Lee

Ballinger

Paint Rock

Mertzon

Brady

Coleman

Winters

Eden

Grape Creek

O. H. IVIE WATERSHED

O. H. IVIE RESERVOIR

Historical Lake Levels

1930193319361939194219451948195119541957196019631966196919721975197819811984198719901993199619992002200520082011

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

180,000

200,000

Lake Nasworthy

O. C. Fisher

Twin Buttes

Ivie Reservoir Capacity Projections

Jun-12 Dec-12 Jun-13 Dec-13 Jun-140

50,000

100,000

150,000

200,000

Aver

age

Inflo

w (a

cre-

feet

/yea

r)

100% of Average Inflow

50% of Average Inflow

No Inflow

MinimumPumping Level

Municipal Water Demands

Water Use Groups

• Residential Use- 62%

• Commercial Use- 18%

• Industrial Use- 4%

• System Operation- 16%

Average Water Use per Person per Day

1995

1996

1997

1998

1999

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

0

50

100

150

200

250G

allo

ns p

er C

apita

Day

183

230

150

174

152

177

Water Consumption Goals

1995 2000 2005 2010 2015 2020

Goal n/a 185 174 163 152 140

Actual 183 199 154 155

0

50

100

150

200

250Actuals

Goal

Efforts to Reduce Water Usage

Residential Conservation

Commercial Conservation

Decorative Groundcover

Municipal Conservation Efforts

Municipal Pool Renovation--Artificial Turf

Bluffs Nature Walk

Native Plants

Municipal Infrastructure Improvements

Water Main Replacements

Mains Replaced- 386,095 ft

Construction Cost- $19,745,000

Estimated Water Savings- 500 million gallons per year

Valve Replacements

AMR Meter Installation Program• 18,000 AMR Installed

• 28,000 meters replaced

Hickory Water Supply Project

HickoryAquifer

Minor Aquifers in Texas

HICKORY AQUIFER

AQUIFER CROSS SECTION

37,000Acres

Eden Melvin

HICKORY WELL FIELD LOCATION

Brady

O. H. Ivie

San Angelo

9

18 7

4

5

6

3

2

9 EXISTING HICKORY WELLS

Typical Well Location

Typical Hickory Well

Operating Well

9

18 7

4

5

6

3

2

HICKORY WELL FIELD PIPING

50,700 feet of 8 inch thru 20 inch piping

Well Field Collector Pipelines

16 inch Collector Pipeline

Pipeline Installation Between Wells

Well Preparation

Cleaning Well Casing

9

18 7

4

5

6

3

2

WELL FIELD

BOOSTER PUMP STATION

BOOSTER PUMP STATION

Booster Pump Station

30” TRANSMISSION MAIN

Concrete Steel Cylinder Pipe

30” Pipeline Installation

Kickapoo Creek Crossing

Transmission Pipeline Status

WELL FIELD

PUMP STATION

STARTINGPOINT

10.1 MILES

AS OF 8/29/126.4 MILES

AS OF 8/29/12

30” PIPELINE

TOTAL: 62 MILESCOMPLETED: 16.5 MILES

Groundwater Treatment - Radium Removal

•Treatment Options: -Ion Exchange (IX) -Reverse Osmosis (RO)

•Pilot Testing Results:-Both methods effective in radium removal

-Ion Exchange Process- 99% water recovery-Reverse Osmosis Process- 90% water recovery

Treatment Method: Ion Exchange (IX)

Pretreatment

Finished Water(99% Recovery)

GranularMediaFilter

Well

Ion Exchange (IX)

SpentResin

Disposal to Licensed Facility

Phosphate

Ion Exchange “Filter” for Radium Removal

RADIOACTIVITY IN THE ENVIRONMENT

Radioactivity in the Environment

1.00E-02

1.00E-01

1.00E+00

1.00E+01

1.00E+02

1.00E+03

1.00E+04

1.00E+05

1.00E+06

Lantern Mantle

Glazed Zircon

Building Tiles

Gypsum Granite Soil Beans Teeth Bone

Rad

ium

Con

cent

rati

on (p

Ci/g

)

Radioactivity in the Environment

1.00E-02

1.00E-01

1.00E+00

1.00E+01

1.00E+02

Untreated Hickory Water

EPA Drinking Water Limit

Medical (Spa) Water

Mineral Water

Wine Beer Milk

Radi

um C

once

ntra

tion

(pCi

/L)

EPA Standard for Drinking Water

• EPA limit for Radium- 5 piC/l

• Health Risk Assessment for Radium-Based on long term exposure

• If 10,000 people consumed 2 liters of water every day for 70 years, there would be a possibility of one additional incident of cancer

Levels of Radium in Drinking Water

• Hickory Well Field- Average 35 pCi/l

• Millersview-Doole WSC- 68 pCi/l

• City of Brady Wells- 19 pCi/l

pCi/L-Picocuries per liter

HICKORY PROJECT SCHEDULE

IX Plant On-Line

Booster Pump Station and Wells Online

Transmission Main Complete

Collector Piping Complete

Jan-12 Jul-12 Feb-13 Aug-13 Mar-14 Sep-14

July 2014

July 2013

July 2013

May 2012

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

Additional Hickory Wells

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

Water Supply Management

Twin Buttes Pumping Project

Twin Buttes South Pool Pumps

Flow Through Equalization Channel

Water Flowing Into North Pool

Water Supply Stage Drought Level III

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

City of San Angelo Water Forum

August 30, 2012