Tetra Tech EM Inc.Water Year 2005-2006

FIGURE 2-2Sacramento River Hydrograph

at Fremont Weir

0

50,000

100,000

150,000

200,000

250,0005/

20/2

005

6/3/

2005

6/17

/200

5

7/1/

2005

7/15

/200

5

7/29

/200

5

8/12

/200

5

8/26

/200

5

9/9/

2005

9/23

/200

5

10/7

/200

5

10/2

1/20

05

11/4

/200

5

11/1

8/20

05

12/2

/200

5

12/1

6/20

05

12/3

0/20

05

1/13

/200

6

1/27

/200

6

2/10

/200

6

2/24

/200

6

3/10

/200

6

3/24

/200

6

4/7/

2006

4/21

/200

6

5/5/

2006

5/19

/200

6

Date

Flow

(cfs

)

Tetra Tech EM Inc.

FIGURE 2-3Total Hg in Sediment vs Total Hg:TSS

in Surface WaterDelta Tributaries

Total Hg vs Total Hg:TSS

y = 0.8267xR2 = 0.8613

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5

Total Hg:TSS in Surface Water

Tot

al H

g (m

g/kg

) in

Fine

Fra

ctio

n of

Bed

Sed

imen

t

Bear River

Cache Creek

Yuba River at Marysville

Feather River at Nicolaus

American River

Deer Creek

Thomes Creek

Cottonwood CreekElder Creek

Colusa Basin Drain to Sacramento River at Knights Landing

Mokelumne River

San Joaquin River at Vernalis

0.2 mg/kg Sediment Objective

0.2 mg/kg Sediment ObjectiveSacramento River at Colusa

Sacramento River at Freeport

DRY CREEK

SACRAMENTO RIVER

WILLOW CREEK

Natomas EastMain Drain

Colusa BasinDrain

American RiverNatomas

Lake

Morrison Creek

Yuba GoldFields

COSUMNES R IVERPUTAH CREEK

SA CRAMEN TO RIVE

RPUTAH C REEK

SACR

AMEN

TO DE

EP

WATE

R CHA

NNEL

PROSPECTSLOUGH

DRY CREEK

YUBA RIVER

BEAR RIVER

FEATHER RIVER

Sutter Bypass

LOWER CACHE CREEK

MOKELUMNE RIVER

COSUMNES RIVER

LAKE BERRYESSA

CAMANCHE RESERVOIR

YoloBypass Freeport

LAKEWILDWOOD

5

80

505

50

CAMP FAR WESTRESERVOIR

ENGLEBRIGHTLAKE

FOLSOM LAKE

Cache CreekSettling Basin Fremont

Weir

SacramentoWeirCache Creek

Settling Basin Weir

LisbonWeir

Sacramento

Yuba City

Davis

Napa

Rio LindaWoodland

Lodi

Elk Grove

Dixon

Fairfield

Rocklin

El Dorado Hills

Auburn

Vallejo

Vacaville

Colusa

Olivehurst

Grass Valley

YoloCapay

Brooks

Rumsey

Esparto

Nicolaus

Verona

2008

-05-27

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EMI-N

V a

ndrew

.dye

POTENTIALLY IMPACTEDAREAS, VALLEY FLOOR

0 8 16

Miles

San Jose

Sacramento

StocktonOakland

Reno

Vallejo Fairfield

Modesto

Carson City

Redding

Chico

Roseville

Napa

Merced

5

80

505

Figure 3-1

LegendYuba GoldfieldsYolo and Sutter BypassMajor River or CreekLimited Access HighwayHighwayMajor RoadLegal Delta BoundaryUrban AreaLake, Reservoir, or BayPotentially Impacted Areas of Interest

Daguerre Point Dam