South Delta BarriersSouth Delta Barriers

Department of Water Resources

OutlineOutline

•• IntroductionIntroduction

•• Temporary Barriers Project (TBP)Temporary Barriers Project (TBP)

•• Historical Water Quality MeasurementHistorical Water Quality Measurement

•• Permanent Barriers (SDIP)Permanent Barriers (SDIP)

IntroductionIntroduction

Temporary Barriers Project Temporary Barriers Project (TBP)(TBP)

Diversion LocationsDiversion Locations

Siphon ● ●Pump

South Delta Barriers LocationsSouth Delta Barriers Locations

TBP Installation HistoryTBP Installation History

ID Task Name1 Middle River Barrier23 DMC Barrier45 Grant Line Canal Barrier67 Spring Head of Old River Barrier89 Fall Head of Old River Barrier

'89 '90 '91 '92 '93 '94 '95 '96 '97 '98 '99 '00 '01 '02 '03 '04

Since 1963

Banks PP and Tracy PP Upstream to San Joaquin River

SLACK TIDE CONDITIONS

Old River at Tracy BarrierOld River at Tracy Barrier

Grant Line Canal BarrierGrant Line Canal Barrier

Middle River BarrierMiddle River Barrier

Head of Old River BarrierHead of Old River Barrier

Historical Water Quality Historical Water Quality MeasurementsMeasurements

Water Quality Compliance/Monitoring SitesWater Quality Compliance/Monitoring Sites

D-1641 Compliance Site

Temporary Barrier Monitoring Site

Old River at Tracy Road Bridge

SJR at Brandt Bridge

Old River near Middle River

SJR at Airport Way Bridge, Vernalis

Typical TBP Water Quality ImprovementsTypical TBP Water Quality Improvements

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2600

Jan.

Feb.

Mar

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Apr

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Jul.

Aug

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Sep

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Oct

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Nov

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Dec

.

Month - 2003

EC

(µS

/cm

) - A

vera

ges

Old River near Head

Old River @ TWA

Old River near DMC Barrier

Temporary barriers installed

DD--1641 Compliance Sites Historical Data 1641 Compliance Sites Historical Data (Critical Dry Year)(Critical Dry Year)

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1400

Oct-93 Nov-93 Dec-93 Jan-94 Feb-94 Mar-94 Apr-94 May-94 Jun-94 Jul-94 Aug-94 Sep-94

EC (µ

S/cm

) - 3

0-da

y R

un A

vg

Vernalis Brandt Bridge Old River @ Tracy Road Bridge Old River near Middle River

DD--1641 Compliance Sites Historical Data 1641 Compliance Sites Historical Data (Wet Year)(Wet Year)

0

200

400

600

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1200

1400

Oct-97 Nov-97 Dec-97 Jan-98 Feb-98 Mar-98 Apr-98 May-98 Jun-98 Jul-98 Aug-98 Sep-98

EC (µ

S/cm

) - 3

0-da

y R

un A

vg

Vernalis Brandt Bridge Old River @ Tracy Road Bridge Old River near Middle River

Permanent Barriers (SDIP)Permanent Barriers (SDIP)

South Delta Improvements Program (SDIP)South Delta Improvements Program (SDIP)

Proposed Grant Line Canal BarrierProposed Grant Line Canal Barrier

Bottom Hinge GateBottom Hinge Gate

D-1641 Compliance Site

Old River at Tracy Road Bridge

SJR at Brandt Bridge

Old River near Middle River

SJR at Airport Way Bridge, Vernalis

DD--1641 Water Quality Compliance Sites1641 Water Quality Compliance Sites

EC at SJR at EC at SJR at VernalisVernalis

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200

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800

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1200

1400

1976197719781979198019811982198319841985198619871988198919901991

EC,(µ

S/cm

) - M

onth

ly A

vera

ges

EC at Old River near Middle RiverEC at Old River near Middle River

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100

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1400

Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar

EC (μ

S/cm

) Mon

thly

Ave

rage

s

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

700 µS/cm objective

1000 µS/cm objective

EC at Old River at Tracy Road BridgeEC at Old River at Tracy Road Bridge

700 µS/cm objective

1000 µS/cm objective

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100

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1000

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1400

Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar

EC (μ

S/cm

) Mon

thly

Ave

rage

s

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

700 μS/cm objective

1000 μS/cm objective

EC at SJR at Brandt BridgeEC at SJR at Brandt Bridge

0

100

200

300

400

500

600

700

800

900

1000

1100

1200

1300

1400

Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar

EC (μ

S/cm

) Mon

thly

Ave

rage

s

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1000 μS/cm objective

700 μS/cm objective

EC at SJR at EC at SJR at VernalisVernalis

0

100

200

300

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1000

1100

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1400

Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar

EC (μ

S/cm

) Mon

thly

Ave

rage

s

1976

1977

1978

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

700µS/cm objective

1000 µS/cm objective

SDIP Current ScheduleSDIP Current Schedule

April 2005April 2005 Release Draft EIR/EISRelease Draft EIR/EIS

May 2005May 2005 Public HearingsPublic Hearings

June 2005June 2005 Public Comments DuePublic Comments Due

December 2005December 2005 Final EIRFinal EIR

Spring 2008Spring 2008 Operate Permanent Operate Permanent BarriersBarriers