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facts July 2009

Sweetwater Authority Boundaries

Gross land area (sq. miles)

41

Loveland reservoir

5.1

Service area

32

San Diego Bay

3.7

City of San Diego

0.2

Service Area

Total Service Area (sq. miles)

 32

National City

7.5

South Bay ID 

24.5

2009 Population estimates (SANDAG)

Service area

total 186,907

South Bay ID 

126,756

National City

59,341

 

Service Connections

Total connections

32,560

Residential

29,319

Commercial

2,646

Government/Other

551

Industrial

38

Agricultural  

6

Pipelines

Total length

388 miles

6 inch diameter and smaller

153

8 to 10 inch

143

12 inch

54

14 to 16 inch

14

larger than 16 inch

24

Average pipe age

38 years

Public Fire Hydrants

Total as of June 2008

2,504

Bonita

447

Chula Vista

1,283

National City

774

Emergency Interconnections & pressure zones

Total emergency interconnections

12

Pressure zones

16

Production

2008-09 total system production 

22,691 af

Local reservoirs

4,428 af

NC wells

1,945 af

Imported water 

12,864 af

Groundwater Desalination

3,454 af

Historical use imported (20 yrs)

55%

Maximum daily consumption-98

32.0 mgd

Average daily consumption

20.3 mgd

Raw Water Storage

Total capacity

53,466 af

 Aqueduct connection capacity  64 cfs

Treated Water

Total storage reservoirs

25

Total capacity (gallons)

42,835,200

Concrete reservoirs

3

Concrete reservoir capacity (gallons)

32,000,000

Steel tanks

16

 Total hydro stations  6

Hydro-pneumatic steel tanks

6

Tank capacity (gallons)

10,835,200

Total pump stations

17

Approximate total pumping capacity (gallons/minute)

36,000

  Aqueduct connection capacity  62 cfs

Sweetwater River Watershed

Total watershed (sq. miles)

182

Lower watershed

38

Middle watershed

42

Upper watershed

102

First Days

Kimball Brothers Water

May 26, 1869

Sweetwater Authority

Feb. 3, 1972

Sweetwater Authority Operations

Aug. 10, 1977

Wholesale Imported Water Cost


per acre foot, from San Diego County Water Authority - Jan. 2009

Raw water (Tier I & II)

$527 / $643

Treated water (Tier I & II)

$695 / $811

Budget

2009-2010 Operating and capital

$56,487,700

Water Equivalents

1 cubic foot

7.48 gal.

1 acre-foot

325,850 gal.

1 million gallons

3.07 af

1 million gallons/day

1,120 af/year

Key to Abbreviations

af = acre feet

mgd = million gallons per day