Alabama Water Resources ConferencePerdido Beach, Alabama

Mac Underwood, General Manager BWWB

BIRMINGHAM WATER WORKS BOARD

Sustainability of Water Supply for the Metro Birmingham Area

September 5, 2007

Outline of this Presentation…Outline of this Presentation…

1.1. Existing BWWSB SystemExisting BWWSB System

2.2. Management of the 2006/2007 DroughtManagement of the 2006/2007 Drought

3.3. Long Range Water Resource PlanningLong Range Water Resource Planning

Outline of this Presentation…Outline of this Presentation…

1.1. Existing BWWSB SystemExisting BWWSB System

2.2. Management of the 2006/2007 DroughtManagement of the 2006/2007 Drought

3.3. Long Range Water Resource PlanningLong Range Water Resource Planning

We are Among the 40 Largest Water We are Among the 40 Largest Water Utilities in the NationUtilities in the Nation

• Largest water utility in AlabamaLargest water utility in Alabama• Supply water to over 650,000 people Supply water to over 650,000 people

(approximately 15% of the State of (approximately 15% of the State of Alabama)Alabama)

• We produce in excess of 100 MGD of We produce in excess of 100 MGD of drinking waterdrinking water

• 31 MGD of raw water provided to Industrial 31 MGD of raw water provided to Industrial customerscustomers

Our Intakes are in the Black Warrior and Our Intakes are in the Black Warrior and Cahaba BasinsCahaba Basins

4 Raw Water Intakes 4 Water Treatment Plants

Our Intakes are in the Black Warrior and Our Intakes are in the Black Warrior and Cahaba BasinsCahaba Basins

Reliable Withdrawal is 176 MGD

Average Day Demand is 134 MGD

- 103 MGD to Treatment Plants

- 31 MGD to Industry (raw water customers)Cahaba River Pump Station

Source Capacity Appears Adequate through 2023 or 2035

(Depending on Future Service Area)

The Board has 4 Water Filtration PlantsThe Board has 4 Water Filtration Plants

Total Treatment Capacity is 179 MGD

Max Day Historical Demand is 167 MGD

Shades Mountain

80 MGD

Western

55 MGD

Putnam

24 MGD

Carson

20 MGD

Treatment Capacity Adequate through 2010

Outline of this Presentation…Outline of this Presentation…

1.1. Existing BWWSB SystemExisting BWWSB System

2.2. Management of the 2006/2007 DroughtManagement of the 2006/2007 Drought

3.3. Long Range Water Resource PlanningLong Range Water Resource Planning

2006/2007 has been a Near-Record 2006/2007 has been a Near-Record Drought!Drought!

Our 2007 Rainfall Deficit is 18 Inches!Our 2007 Rainfall Deficit is 18 Inches!Average Cumulative Rainfall

0

10

20

30

40

50

60

70

Jan1

Jan15

Jan29

Feb12

Feb26

Mar11

Mar25

Apr8

Apr22

May6

May20

Jun3

Jun17

Jul1

Jul15

Jul29

Aug12

Aug26

Sep9

Sep23

Oct7

Oct21

Nov4

Nov18

Dec2

Dec16

Dec30

inch

es o

f ra

in

2007

2000

NWS Normal

NWS 2007

2005

1999

The data for this graph comes fromaveraging the daily reported rainfallfrom six BWWSB sites: Lake Purdy,Inland Lake, Carson, Putnam,Western, and Shades Mountain,along with data from theBirmingham office of the NationalWeather Service (NWS).

2006

NWS 1986

We are in Stage 3 of our Drought We are in Stage 3 of our Drought Management Plan Management Plan

Stage 1: (April 10th)Stage 1: (April 10th)

Stage 2: (May 10th)Stage 2: (May 10th)

Stage 3: (June 7th)Stage 3: (June 7th)

Stage 3 Highlights

•Mandatory Restrictions

•2-tiered surcharge above 12 CCF per month

•Hand watering only (2 days per week)

•No watering on Wednesday, Saturday, Sunday

Our Inland Lake Reservoir is Our Inland Lake Reservoir is Approximately 67% FullApproximately 67% Full

Birmingham Water Works & Sewer BoardInland Lake Storage

0%

25%

50%

75%

100%

Jan1

Jan15

Jan29

Feb12

Feb26

Mar11

Mar25

Apr8

Apr22

May6

May20

Jun3

Jun17

Jul1

Jul15

Jul29

Aug12

Aug26

Sep9

Sep23

Oct7

Oct21

Nov4

Nov18

Dec2

Dec16

Dec30

Date

full pool (20450 MG)

historic low level (January 29, 1956)

reserve pool (5113 MG)5113 MGEL 732'

10225 MGEL 54.75'

15338 MGEL 770.6'

20450 MGEL 784'

33.2 feet down - 9125 MG - 44.6% capacity

guide curve (49 MGD starting May 1)

2006

2007

2000

19921999

1986

Inland on gravity flow; limited to 15 MGD

Inland on gravity flow; limited to 25 MGD

June 1

1988

Our Lake Purdy Reservoir is Also Our Lake Purdy Reservoir is Also Approximately 67% FullApproximately 67% Full

We Manage Each of our Sources We Manage Each of our Sources Conjunctively Conjunctively

4 Raw Water Intakes 4 Water Treatment Plants

Our Ability To Do So This Year has Our Ability To Do So This Year has Been Hampered by Bromide Levels in Been Hampered by Bromide Levels in

the Warrior Riverthe Warrior River

On October 27, 2006 ADEM Notified us On October 27, 2006 ADEM Notified us That Jasper’s Consecutive Systems were That Jasper’s Consecutive Systems were

Experiencing DBP Problems…Experiencing DBP Problems…

• The source of the problem was an industrial The source of the problem was an industrial discharge into the Riley Maze Treatment Plant in discharge into the Riley Maze Treatment Plant in Arab Alabama.Arab Alabama.

• We had to shut down our Mulberry Intake until the We had to shut down our Mulberry Intake until the issue was resolved in late May.issue was resolved in late May.

• This significantly impacted our ability to control This significantly impacted our ability to control lake levels as the drought developed this spring! lake levels as the drought developed this spring!

Our Challenges Are to Manage the Our Challenges Are to Manage the Reservoir Levels in the Face of the Reservoir Levels in the Face of the

Extended Forecast!Extended Forecast!

““This all adds Impetus to our Long-This all adds Impetus to our Long-Range Water Resource Planning”Range Water Resource Planning”

Outline of this Presentation…Outline of this Presentation…

1.1. Existing BWWSB SystemExisting BWWSB System

2.2. Management of the 2006/2007 DroughtManagement of the 2006/2007 Drought

3.3. Long Range Water Resource PlanningLong Range Water Resource Planning

Projected Population Change 2000-2075Projected Population Change 2000-2075

Service Population is projected to grow between 43% and 63% by 2075!

2005 – 2075 RPCI Population 2005 – 2075 RPCI Population Projections (Adjusted) for Existing Projections (Adjusted) for Existing and Potential Future Service Areasand Potential Future Service Areas

YearRPCI Adj for 2000 Census Population Projection w/ Existing Service Areas

RPCI Adj for 2000 Census Population Projections w/

Potential Service Area

2005 608,269 686,0052010 617,977 700,1502015 644,604 736,1922020 681,598 777,6732025 702,562 802,3432030 727,709 830,9222035 746,404 852,2442040 759,131 866,8802045 778,942 889,5042050 790,742 903,0202055 806,557 921,0802060 822,688 939,5022065 839,142 958,2922070 855,925 977,4582075 873,043 997,007

Existing and Potential Future Service AreasExisting and Potential Future Service Areas

Existing and Potential Service Area Existing and Potential Service Area Total Average Daily DemandTotal Average Daily Demand

YearRPCI Adj for 2000 Census

Demands (MGD) w/ Existing Service Areas

RPCI Adj for 2000 Census Demands (MGD) w/ Potential

Service Area

2005 135 1482010 139 1532015 146 1622020 155 1722025 161 1792030 167 1862035 174 1932040 176 1952045 180 2002050 181 2012055 185 2052060 189 2092065 193 2142070 197 2182075 201 222

Future Supply Shortfall for Both Service Future Supply Shortfall for Both Service Area ScenariosArea Scenarios

““BWWSB plans to augment its supply BWWSB plans to augment its supply by up to 50 MGD by 2025!”by up to 50 MGD by 2025!”

Finding and Implementing SolutionsFinding and Implementing Solutions

Potential Water Supply AlternativesPotential Water Supply Alternatives• New Source in the Black Warrior Basin

• New Source in the Tennessee River Basin

• New Source in the Coosa River Basin

• New Source in the Black Belt

• Groundwater

• Local Quarries

• Aquifer Storage and Recovery

• Water Reuse / Recycling – for Industrial Customers

• Increased Capacity at Lake Purdy

• Conservation

Questions?Questions?