7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

-2.50

-2.25

-2.00

-1.75

-1.50

-1.25

-1.00

-0.75

-0.50

-0.25

0.00

0.25

Res

ervo

ir El

evat

ion

ft

Mon

umen

t Set

tlem

ent f

t

Date

Maximum Section Vertical Deformation - Ritschard Dam Crest

DM 1DM 2DM 3DM 4DM 5DM 6DM 7DM 8DM 9DM 10DM 11DM 12DM 13Elevation

7440

7450

7460

7470

7480

7490

7500-1.0

-0.8

-0.6

-0.4

-0.2

0.0

0.2

Rese

rvoi

r Ele

vatio

n ft

MSL

Dow

nstr

eam

Dis

plac

emen

t -Fe

et

Date

Ritschard Downstream Displacement - Crest Monuments

DM05

DM06

DM07

DM08

DM09

DM10

RES EL

28 ft Drawdown - Nov 2002

38 ft Drawdown - Nov 2012

Ice - Jan 2012

24 ft Drawdown - Nov 2004

Begin 10 ft drawdown - July 2014

7497.5

7498.0

7498.5

7499.0

7499.5

7500.0

7500.5

7501.0

7501.5

7502.0

17000 17200 17400 17600 17800 18000 18200 18400 18600 18800 19000

Deformation Monument Easting (Feet)

October 31, 1995July 23, 1996July 17, 1997June 30, 1998November 24, 1999October 30, 2000August 29, 2001November 24, 2002January 16, 2004December 22, 2006September 9, 2008August 4, 2009December 16, 2009July 27, 2010January 27, 2011September 20, 2011January 31, 2012June 28, 2012November 14, 2012April 26, 2013July 30, 2013April 17, 2014July 3, 2014November 14, 2014April 13, 2015July 22, 2015October 15, 2015April 14, 2016June 7, 2016October 14, 2016

SpillwayChannel

DM14 - Tower -0.01 ft

DM1

DM7

DM9

DM13

LeftAbutment

DM8

DM6 - 7497.78 ft MSL - 2.30 ft

Vertical Deformation Across Ritschard Dam Crest Bridge and TowerEl

evat

ion

MSL

(Fee

t)

DM16 - Bridge Abutment

DM15 - Pier 2 Deck -0.07 ft

DM11

DM10

DM5DM4

DM3 DM2

DM12

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

0.1

Sett

lem

ent f

t

Date

Downstream Shell DM Settlement 2009-2016

DM24DM25DM26DM27DM28DM29DM30DM31DM32DM33DM34DM35DM36DM37DM38DM39

July 2014November 2014

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

0.1

0.2

Hor

izon

tal D

ispl

acem

ent f

t

Date

Downstream Shell DM Horizontal Displacement 2009-2016

DM24DM25DM26DM27DM28DM30DM30DM31DM32DM33DM34DM35DM36DM37DM38DM39

Dow

nstr

eam

July 2014

November 2014

-1.00

-0.75

-0.50

-0.25

0.00

0.25

-0.50-0.250.000.25

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Shell

DM36

DM37

DM38

DM39

Bridge Monuments from 11/2009 to 6/2016

11/09

10/16

-0.75

-0.50

-0.25

0.00

0.25

-0.50-0.250.000.25

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Shell

DM32

DM33

DM34

DM35

Bridge Monuments from 11/2009 to 6/2016

11/09

10/16

-0.25

0.00

0.25

-0.50-0.250.000.25

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Shell

DM28

DM29

DM30

DM31

Bridge Monuments from 11/2009 to 6/2016

11/09

10/16

-0.25

0.00

0.25

-0.50-0.250.000.25

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Shell

DM24

DM25

DM26

DM27

Bridge Monuments from 11/2009 to 6/2016

11/09

10/16

-0.90

-0.80

-0.70

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0.10

-0.60-0.50-0.40-0.30-0.20-0.100.000.10

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Slope

DM6 DM24 DM28 DM32 DM36 D-S Slope

Downstream Face DMs from 8/2009 to 6/2016

-0.90

-0.80

-0.70

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0.10

-0.60-0.50-0.40-0.30-0.20-0.100.000.10

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Slope

DM07 DM25 DM29 DM33 DM37 D-S Slope

Downstream Face DMs from 8/2009 to 6/2016

-0.90

-0.80

-0.70

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0.10

-0.60-0.50-0.40-0.30-0.20-0.100.000.10

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Slope

DM8 DM26 DM30 DM34 DM38 D-S Slope

Downstream Face DMs from 8/2009 to 6/2016

-0.90

-0.80

-0.70

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0.10

-0.60-0.50-0.40-0.30-0.20-0.100.000.10

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Downstream Slope

DM9 DM27 DM31 DM35 DM39 D-S Slope

Downstream Face DMs from 8/2009 to 6/2016

-2.25

-2.00

-1.75

-1.50

-1.25

-1.00

-0.75

-0.50

-0.25

0.00

0.25

-1.50-1.25-1.00-0.75-0.50-0.250.000.25

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Bridge and Crest

Crest - DM09

Abutment - DM16

Deck 2 - DM15

Tower - DM14

Bridge Monuments from 10/1995 to 6/2016

10/95

10/16

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0.10

0.20

-0.50-0.40-0.30-0.20-0.100.000.10

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Bridge Piers

Abutment - DM40

Pier 1 Cap - DM41

Pier 2 Cap - DM42

Pier 3 Cap - DM43

Bridge Monuments from 8/2009 to 6/2016

8/09

10/16

ice 02/13/12

-0.80

-0.70

-0.60

-0.50

-0.40

-0.30

-0.20

-0.10

0.00

0.10

0.20

-0.50-0.40-0.30-0.20-0.100.000.10

Sett

lem

ent f

t

Northing Displacement ft

Ritschard Displacement Vectors - Bridge Piers

Crest - DM9

Abutment - DM16

Deck 2 - DM15

Tower - DM14

Abutment - DM40

Pier 1 Cap - DM41

Pier 2 Cap - DM42

Pier 3 Cap - DM43

Bridge Monuments from 8/2009 to 6/2016

8/09

10/16

ice 02/13/12

7320

7340

7360

7380

7400

7420

7440

7460

7480

7500

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

eaio

n in

feet

MSL

Cumulative Displacement from 11/17/2009 in inches

Ritschard Inclinometer Cumulative Displacement I-1 A-Axis12/10/20091/14/20102/25/20104/26/20106/2/20106/21/20107/28/20108/24/20109/21/201010/20/201011/18/201012/20/20101/30/20112/23/20113/24/20114/21/20114/27/20115/27/20116/24/20117/27/20118/26/20119/28/201110/24/201111/28/20111/2/20122/2/20122/29/20124/5/20125/2/20126/6/20127/5/20128/8/20129/12/201210/10/201211/7/201212/5/20121/27/20132/6/20133/14/20134/10/20135/15/20136/13/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/2/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7362' MSL

Core

Upstream Downstream

2012 Drawdown

2013 Fill

2012 Drawdown

ApproxMonthlyReadings

2014 Fill

2016 Fill

7290

7310

7330

7350

7370

7390

7410

7430

7450

7470

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 11/17/2009 in inches

Ritschard Inclinometer Cumulative Displacement I-2 A-Axis12/2/20091/14/20102/11/20103/25/20104/22/20105/25/20106/21/20107/28/20108/24/201010/20/201011/18/201012/20/20101/26/20112/23/20113/24/20115/4/20115/27/20116/24/20117/27/20118/26/20119/28/201110/24/201111/28/20111/2/20122/2/20122/28/20124/5/20125/2/20126/6/20127/5/20128/8/20129/12/201210/3/201211/7/201212/5/20121/27/20132/6/20133/14/20134/10/20135/15/20136/13/20137/3/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/11/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/29/20158/25/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7361' MSL

Shell

Overburden 7366' MSL

Upstream Downstream

2012 Drawdown

2013 Refill

ApproxMonthlyReadings

2015 Spring Ops

7320

7340

7360

7380

7400

7420

7440

7460

7480

7500

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 12/16/2011 in inches

Ritschard Inclinometer Cumulative Displacement I-1 A-Axis1/2/20122/2/20122/28/20124/5/20125/2/20126/6/20127/5/20128/8/20129/5/201210/3/201211/7/201212/5/20121/27/20132/6/20133/14/20134/4/20135/8/20136/4/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/2/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20158/21/20159/18/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7362' MSL

Core

Upstream Downstream

2012 Drawdown

2013 Fill

ApproximatelyMonthlyReadings

2014 Fill

2016 Fill

7320

7340

7360

7380

7400

7420

7440

7460

7480

7500

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 12/16/2011 in inches

Ritschard Inclinometer Cumulative Displacement I-3 A-Axis12/20/20111/2/20122/6/20122/29/20124/5/20125/2/20126/6/20127/5/20128/8/20129/5/201210/3/201211/7/201212/5/20121/27/20132/6/20133/14/20134/4/20135/8/20136/4/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/11/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/29/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7362' MSL

Core

Upstream Downstream

2012Drawdown

2013 Fill

ApproxMonthlyReadings

2014 Fill

2014 Drawdown

2016 Fill

7320

7340

7360

7380

7400

7420

7440

7460

7480

7500

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 12/16/2011 in inches

Ritschard Inclinometer Cumulative Displacement I-5 A-Axis12/20/20111/2/20122/2/20122/29/20124/5/20125/2/20126/6/20127/5/20128/8/20129/5/201210/3/201211/7/201212/5/20121/27/20132/6/20133/14/20134/4/20135/8/20136/4/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/11/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/29/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7385' MSL

Core

Upstream Downstream

2012 Drawdown

2013 Refill

ApproxMonthlyReadings

7290

7310

7330

7350

7370

7390

7410

7430

7450

7470

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 12/16/2011 in inches

Ritschard Inclinometer Cumulative Displacement I-2 A-Axis1/2/20122/2/20122/28/20124/5/20125/2/20126/6/20127/5/20128/8/20129/5/201210/3/201211/7/201212/5/20121/27/20132/6/20133/14/20134/4/20135/8/20136/4/20137/3/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/11/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/29/20158/25/20159/18/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20154/15/2017

Bedrock 7361' MSL

Shell

Overburden 7366' MSL

Upstream Downstream

2012 Drawdown

2013 Refill

ApproximatelyMonthlyReadings

2015 Spring Ops

7310

7330

7350

7370

7390

7410

7430

7450

7470

7490

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 12/16/2011 in inches

Ritschard Inclinometer Cumulative Displacement I-4 A-Axis12/20/20111/2/20122/2/20122/29/20124/5/20125/2/20126/6/20127/5/20128/8/20129/5/201211/7/201211/7/201212/5/20121/27/20132/6/20133/14/20134/4/20135/8/20136/4/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/2/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/29/20158/25/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/2017

Bedrock 7360' MSL

Shell

Upstream Downstream

2012Drawdown

2013 Fill

ApproxMonthlyReadings

2015 Fill

2016 Fill

7310

7330

7350

7370

7390

7410

7430

7450

7470

7490

-1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement from 12/16/2011 in inches

Ritschard Inclinometer Cumulative Displacement I-6 A-Axis12/20/20111/2/20122/6/20122/28/20124/5/20125/2/20126/6/20127/5/20128/8/20129/12/201210/3/201211/7/201212/5/20121/27/20132/6/20133/14/20134/10/20135/8/20136/4/20138/14/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/2/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7378' MSL

Shell

Upstream Downstream

2012 Drawdown

2013 Fill

ApproxMonthlyReadings

7310

7330

7350

7370

7390

7410

7430

7450

7470

7490

-1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1

Elev

atio

n in

feet

MSL

Cumulative Displacement from 8/2/2012 in inches

Ritschard Inclinometer Cumulative Displacement I-7 A-Axis8/8/20128/15/128/22/20128/29/20129/5/20129/12/20129/19/20129/25/201210/3/201210/10/201210/17/201210/22/201210/31/201211/7/201211/14/201212/5/20126/13/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/2/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7363' MSL

Shell

Upstream Downstream

2012 Drawdown

Post-2012 Drawdown and Refill

Mix ofMonthly/WeeklyReadings

7310

7330

7350

7370

7390

7410

7430

7450

7470

7490

-1 -0.75 -0.5 -0.25 0 0.25 0.5 0.75 1

Elev

atio

n in

feet

MSL

Cumulative Displacement from 8/2/2012 in inches

Ritschard Inclinometer Cumulative Displacement I-8 A-Axis8/8/20129/5/20129/12/20129/19/20129/25/201210/3/201210/10/201210/31/201211/7/201212/5/20121/27/20136/13/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/15/20146/2/20147/9/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/16/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20167/14/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7385' MSL

Shell

Upstream Downstream

2012 Drawdown

Post-201 Drawdown and Refill

Mix ofMonthly/WeeklyReadings

7310

7330

7350

7370

7390

7410

7430

7450

7470

7490

-2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5

Elev

atio

n in

feet

MSL

Cumulative Displacement from 8/2/2012 in inches

Ritschard Inclinometer Cumulative Displacement I-9 A-Axis8/8/20129/5/201210/10/201211/7/201212/5/20121/27/20132/6/20133/14/20134/10/20135/8/20135/29/20136/13/20137/9/20138/14/20139/5/201310/9/201311/7/201312/2/20131/16/20142/11/20143/5/20144/16/20145/7/20146/2/20147/1/20148/5/20149/11/201410/7/201411/6/201412/10/20141/9/20152/12/20153/17/20154/13/20155/14/20156/17/20157/16/20158/21/20159/18/201510/14/201511/19/201512/9/20151/15/20162/21/20163/16/20164/14/20165/19/20166/16/20168/17/20169/14/201610/7/201611/9/201612/9/20161/12/20172/12/20173/9/20174/15/2017

Bedrock 7363' MSL

Shell

Upstream Downstream

Post-2012 Drawdown and Refill

2012 Drawdown

2014 Fill

ApproxMonthlyReadings

2016 Fill

7290

7310

7330

7350

7370

7390

7410

7430

7450

7470

-1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0

Elev

atio

n in

feet

MSL

Cumulative Displacement from 9/14/2016 in inches

Ritschard Inclinometer Cumulative Displacement I-10 A-Axis

10/7/2016

11/9/2016

12/12/2016

1/12/2017

2/12/2017

3/9/2017

4/15/2017

Bedrock 7372.5' MSL

Shell

Upstream DownstreamApproxMonthlyReadings

7290

7310

7330

7350

7370

7390

7410

7430

7450

7470

-1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0

Elev

atio

n in

feet

MSL

Cumulative Displacement from 9/14/2016 in inches

Ritschard Inclinometer Cumulative Displacement I-10 B-Axis

10/7/2016

11/9/2016

12/12/2016

1/12/2017

2/12/2017

3/9/2017

4/15/2017

Bedrock 7372.5' MSL

Shell

Upstream DownstreamApproxMonthlyReadings

7280

7300

7320

7340

7360

7380

7400

7420

7440

7460

7480

7500

-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement 11/28/2011 to 3/16/2016 in inches

Ritschard Core Inclinometers Cumulative Displacement A-Axis

I-1

I-3

I-5

Bedrock 7362' MSL

Core

Upstream Downstream

Bedrock 7362' MSL

Bedrock 7385' MSL

movement since November 2011

7280

7300

7320

7340

7360

7380

7400

7420

7440

7460

7480

7500

-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4

Elev

atio

n in

feet

MSL

Cumulative Displacement 11/28/2011 to 3/16/2016 in inches

Ritschard Shell Inclinometers Cumulative Displacement A-Axis

I-2

I-4

I-6

Bedrock 7360' MSL

Shell

Upstream Downstream

Bedrock 7378' MSL

Bedrock 7361' MSL

movement since November 2011

7450

7452

7454

7456

7458

7460

7462

7464

7466

7468

7470

7472

7474

7476

7478

7480

7482

7484

7486

7488

7490

7492

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-1 A-Axis

10

20

30

40

50

60

70

Elevation

0.4"

0.74"

7450

7452

7454

7456

7458

7460

7462

7464

7466

7468

7470

7472

7474

7476

7478

7480

7482

7484

7486

7488

7490

7492

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-3 A-Axis

10

20

30

40

50

60

70

Elevation

7450

7452

7454

7456

7458

7460

7462

7464

7466

7468

7470

7472

7474

7476

7478

7480

7482

7484

7486

7488

7490

7492

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-5 A-Axis

10

20

30

40

50

60

70

Elevation

7450

7452

7454

7456

7458

7460

7462

7464

7466

7468

7470

7472

7474

7476

7478

7480

7482

7484

7486

7488

7490

7492

-0.4

-0.2

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-2 A-Axis

10

20

30

40

50

60

70

Elevation

0.3"

0.48"

0.38"

7450

7452

7454

7456

7458

7460

7462

7464

7466

7468

7470

7472

7474

7476

7478

7480

7482

7484

7486

7488

7490

7492

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-4 A-Axis

10

20

30

40

50

60

70

Elevation

7450

7452

7454

7456

7458

7460

7462

7464

7466

7468

7470

7472

7474

7476

7478

7480

7482

7484

7486

7488

7490

7492

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-6 A-Axis

10

20

30

40

50

60

70

Elevation

7435

7440

7445

7450

7455

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-7 A-Axis

26364658667686Elevation

7435

7440

7445

7450

7455

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

-1

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-8 A-Axis

26364656667686Elevation

7435

7440

7445

7450

7455

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement by Depth Compared to Water Surface Elevation I-9 A-Axis

26364656667686Elevation

7435

7440

7445

7450

7455

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

-0.2

-0.1

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement Comparison I-1 minus I-2 A-Axis

7450

7457

7464

7471

7478

7485

7492

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

Rese

rvoi

r Ele

vatio

n in

feet

Disp

lace

men

t in

inch

es

Date

Ritschard Inclinometer Displacement Comparison I-1 minus I-2; I-3 minus I-4; I-5 minus I-6: A-Axis

I-1 minus I-2I-3 minus I-4I-5 minus I-6Elevation

-0.54-0.52-0.50-0.48-0.46-0.44-0.42-0.40-0.38-0.36-0.34-0.32-0.30-0.28-0.26-0.24-0.22-0.20-0.18-0.16-0.14-0.12-0.10-0.08-0.06-0.04-0.020.000.020.040.06

Diffe

renc

e fr

om In

itial

Ele

vatio

n 11

/17/

09 (

ft)

Date

Ritschard Dam 2009 Instrumentation Extensometer ME-1 Readings

CHANGE TOP (7499' MSL)

CHANGE SM 4 (7480' MSL)

CHANGE SM 3 (7445' MSL)

CHANGE SM 2 (7415' MSL)

CHANGE SM 1 (7385' MSL)

CHANGE DATUM (7322' MSL)

(Assumes Datum Magnet is Fixed)

-0.54-0.52-0.50-0.48-0.46-0.44-0.42-0.40-0.38-0.36-0.34-0.32-0.30-0.28-0.26-0.24-0.22-0.20-0.18-0.16-0.14-0.12-0.10-0.08-0.06-0.04-0.020.000.020.040.06

Diffe

renc

e fr

om In

itial

Ele

vatio

n 11

/17/

09 (

ft)

Date

Ritschard Dam 2009 Instrumentation Extensometer ME-2 Readings

CHANGE TOP (7465' MSL)

CHANGE SM 4 (7440' MSL)

CHANGE SM 3 (7419' MSL)

CHANGE SM 2 (7400' MSL)

CHANGE SM 1 (7379' MSL)

CHANGE DATUM (7289' MSL)

(Assumes Datum Magnet Fixed)

-0.16

-0.14

-0.12

-0.10

-0.08

-0.06

-0.04

-0.02

0.00

0.02

0.04

0.06

Diffe

renc

e fr

om In

itial

Ele

vatio

n 8/

2/12

(ft

)

Date

Ritschard Dam 2009 Instrumentation Extensometer ME-3 Readings

CHANGE TOP (7495' MSL)

CHANGE SM 4 (7466' MSL)

CHANGE SM 3 (7440' MSL)

CHANGE SM 2 (7406' MSL)

CHANGE SM 1 (7391' MSL)

CHANGE DATUM (7344' MSL)

(Assumes Datum Magnet Fixed)

-0.16

-0.14

-0.12

-0.10

-0.08

-0.06

-0.04

-0.02

0.00

0.02

0.04

0.06

Diffe

renc

e fr

om In

itial

Ele

vatio

n 8/

2/12

(ft

)

Date

Ritschard Dam 2009 Instrumentation Extensometer ME-4 Readings

CHANGE TOP (7495' MSL)

CHANGE SM 4 (7469' MSL)

CHANGE SM 3 (7453' MSL)

CHANGE SM 2 (7432' MSL)

CHANGE SM 1 (7413' MSL)

CHANGE DATUM (7372' MSL)

(Assumes Datum Magnet Fixed)

7360

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

Reservoir Surface

P-5, P-5A isolated in foundation near P-1

P-6, P-6A isolated in core @90-100' near bridge abutment 7' u/s of centerline

P-7, P-7A isolated in core @90-100'near bridge abutment 7' d/s of centerline

P-1 isolated in core @125-135' 7' d/s of centerline

P-9, 10, 11 isolated in core @90-100' (east to west)

7360

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers P-1 OSPP-5A OSPP-6A OSPP-7A OSPP-5 VWPP-6 VWPP-7 VWPP-9 OSPP-10 OSPP-11 OSPP-12 OSPElevationVW-10VW-11VW-12VW-13VW-14VW-15VW-16VW-17VW-18VW-19VW-20VW-21VW-22VW-23VW-24VW-25VW-26VW-27VW-28VW-29VW-30VW-31VW-32VW-33VW-34VW-35

Reservoir Surface

7450

7455

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

Elev

atio

n (ft

)

Date

Ritschard Dam Core Piezometers

P-6 VWP

P-7 VWP

Reservoir

Full Pool

P-6A OSP

P-7A OSP

Spill Spill Spill2012 Drawdown Spill

y = 0.1381x + 6462.9R² = 0.3318

y = 0.1153x + 6626.2R² = 0.3837

7480

7485

7490

7495

7500

7465 7470 7475 7480 7485 7490 7495

Piez

omet

er W

ater

Sur

face

Ele

vatio

n ft

MSL

Reservoir Surface Elevation ft MSL

Piezometer Response to Reservoir Load

P-6

P-7

Linear (P-6)

Linear (P-7)

August 2013 - January 2017

May 18, 2016- rapid fill

June 16, 2016

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers P-1 OSPP-5A OSPP-6A OSPP-7A OSPP-5 VWPP-6 VWPP-7 VWPP-9 OSPP-10 OSPP-11 OSPElevationVW-10VW-11VW-12VW-13VW-14VW-15VW-16VW-17VW-18VW-19VW-20VW-21VW-22VW-23VW-24VW-25VW-26VW-27VW-28VW-29VW-30VW-30VW-32VW-33VW-34VW-35

Reservoir Surface

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

7510

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

P-12 OSP

Elevation

VW-10 @45 ft

VW-11 @53 ft

VW-12 @62 ft

VW-13 @75 ft

Reservoir Surface

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

7510

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-14 @45 ft

VW-15 @53 ft

VW-16 @62 ft

VW-17 @75 ft

Reservoir Surface

7460

7465

7470

7475

7480

7485

7490

7495

7500

7505

7510

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-18 @45 ft

VW-19 @53 ft

VW-20 @62 ft

VW-21 @75 ft

Reservoir Surface

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-22 @45 ft

VW-23 @53 ft

VW-24 @60 ft

VW-25 @75 ft

Reservoir Surface

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-26 @20 ft

VW-27 @28 ft

VW-28 @36 ft

VW-29 @45 ft

VW-30 @80 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-31 @20 ft

VW-32 @28 ft

VW-33 @36 ft

VW-34 @45 ft

VW-35 @80 ft

Reservoir Surface

7350

7360

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

Elev

atio

n (ft

)

Date

Ritschard Dam Core Piezometers

Reservoir

Full Pool

P-1

P-6A

P-7A

P-9

P-10

P-11

Spill SpillSpill

Completion Interval

SpillOvertopping Spill

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

Elev

atio

n (ft

)

Date

Ritschard Dam Core OSP Piezometers

Reservoir

Full Pool

P-1

P-6A

P-7A

P-9

P-10

P-11

SpillSpillOvertopping

Spill

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

Elev

atio

n (ft

)

Date

Ritschard Dam Core Piezometers - Upstream of Dam Axis

Reservoir

Full Pool

P-9

P-6A

P-10

SpillOvertopping

SpillSpill

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

Elev

atio

n (ft

)

Date

Ritschard Dam Core Piezometers - Downstream of Dam Axis

Reservoir

Full Pool

P-1

P-7A

P-11

Spill Spill Spill

7360

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

7540

Elev

atio

n (ft

)

Date

Ritschard Dam Foundation Piezometers Reservoir

Full Pool

VW-3

VW-4

VW-5

P-5A

VW-8

VW-9

Spill

Spill Spill

7360

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

Elev

atio

n (ft

)

Date

Ritschard Dam Foundation Piezometers ReservoirFull PoolVW-3VW-4P-5A

Spill Spill Spill

7370

7375

7380

7385

7390

Elev

atio

n (ft

)

Date

Ritschard Dam Foundation Piezometers

VW-3

VW-4

P-5A

Spill Spill

Spill

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

Elev

atio

n (ft

)

Date

Ritschard Dam Piezometers

Reservoir

Full Pool

P-1

P-5

P-5A

VW-3

VW-4

Spill Spill Spill

-0.20

-0.19

-0.18

-0.17

-0.16

-0.15

-0.14

-0.13

-0.12

-0.11

-0.10

-0.09

-0.08

-0.07

7355

7365

7375

7385

7395

7405

7415

7425

7435

7445

7455

7465

7475

7485

Pore

Wat

er P

ress

ure

(atm

)

Dept

h (ft

)

Date

Ritschard Dam Piezometers

P-1 P-2

P-3 P-4

PM-1 PM-2

VW-2 (7362') VW-1 (7391')

7445

7450

7455

7460

7465

7470

7475

7480

7485

7490

7495

Elev

atio

n (ft

)

Date

Ritschard Dam Piezometers

P-1

Reservoir

Full Pool

Spill Spill Spill Spill

7450

7457

7464

7471

7478

7485

7492

7373

7375

7377

7379

7381

7383

7385

Rese

rvoi

r Ele

vatio

n ft

MSL

Piez

omet

er E

leva

tion

ft M

SL

Date

Ritschard Dam Downstream Shell Piezometers P-2P-3P-4PM-1Stilling BasinPM-2ReservoirFull Pool

Spill Spill Spill SpillSpill

7375

7385

7395

7405

7415

7425

7435

7445

7455

7465

7475

7485

7495Pi

ezom

eter

Ele

vatio

n ft

MSL

Date

Ritschard Dam Downstream Shell Piezometers

P-2P-3P-4PM-1Stilling BasinReservoirFull PoolPM-2

Spill Spill Spill SpillSpill

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers ML-1

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-10 @45 ft

VW-11 @53 ft

VW-12 @62 ft

VW-13 @75 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers ML-2

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-14 @45 ft

VW-15 @53 ft

VW-16 @62 ft

VW-17 @75 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers ML-3

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-18 @45 ft

VW-19 @53 ft

VW-20 @62 ft

VW-21 @75 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers ML-4

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-22 @45 ft

VW-23 @53 ft

VW-24 @60 ft

VW-25 @75 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers ML-5

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-26 @20 ft

VW-27 @28 ft

VW-28 @36 ft

VW-29 @45 ft

VW-30 @80 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers ML-6

P-1 OSP

P-5A OSP

P-6A OSP

P-7A OSP

P-5 VWP

P-6 VWP

P-7 VWP

P-9 OSP

P-10 OSP

P-11 OSP

Elevation

VW-31 @20 ft

VW-32 @28 ft

VW-33 @36 ft

VW-34 @45 ft

VW-35 @80 ft

Reservoir Surface

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers

VW-10

VW-11

VW-12

VW-13

VW-14

VW-15

VW-16

VW-17

VW-18

VW-19

VW-20

VW-21

VW-22

VW-23

VW-24

VW-25

VW-26

VW-27

VW-28

VW-29

VW-30

VW-30

VW-32

VW-33

VW-34

VW-35

Elevation

Reservoir Surface

7370

7380

7390

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

7510

7520

7530

Elev

atio

n M

SL (f

t)

Date

Ritschard Dam Core Piezometers VW-10VW-11VW-12VW-13VW-14VW-15VW-16VW-17VW-18VW-19VW-20VW-21VW-22VW-23VW-24VW-25VW-26VW-27VW-28VW-29VW-30VW-31VW-32VW-33VW-34VW-35P-1 OSPP-5A OSPP-6A OSPP-7A OSPP-5 VWPP-6 VWPP-7 VWPP-9 OSPP-10 OSPP-11 OSPP-12Elevation

Reservoir Surface

7360

7380

7400

7420

7440

7460

7480

7500

Res

ervo

ir El

evat

ion

Date

Ritschard Dam Open Stand Pipe Piezometer ElevationsReservoir Elevation OSP-1 OSP-2 OSP-3 OSP-4 OSP-5

7400

7410

7420

7430

7440

7450

7460

7470

7480

7490

7500

0

5

10

15

20

25

30

35

40

45

50

Res

ervo

ir El

evat

ion

Gal

lons

per

Min

ute

Date

Ritschard Dam East Valley Drain Flows

East Valley Drain Flow Reservoir Elevation Full Elevation

Note: when the tailwater elevation exceeds 7373.5 ft MSL the drain weir box is inundated and cannot be measured

Date Res Elev Flow 9/5/13 7474 ft 0.1 gpm10/16/13 7473 ft 0.0 gpm4/14/14 7472 ft 0.0 gpm 5/15/14 7476 ft 0.5 gpm

Date Res Elev Flow 8/6/14 7479 ft 0.2 gpm9/12/14 7475 ft 0.0 gpm

Date Res Elev Flow 10/9/12 7456.7 ft 0.1 gpm10/16/12 7458.1 ft 0.0 gpm5/15/13 7465.5 ft 0.0 gpm 5/22/13 7471.7 ft 0.4 gpm

approx. reservoir elevation below which drain is dry