RECLAMATION 

Managing Water in th

U.S. Department of the Interior 

Temperature

Control Device

Update
LTEMP Conservation Measure 

Reclamation would explore the efficacy of a temperatdevice at the dam to respond to potential extremes inconditions due to climate conditions that could result

fish establishment.  Evaluations would be ongoing foand evolving technological advances that could proviwarming and cooling the river in both high‐ and low‐fscenarios, and high and low reservoir levels.  These stinclude evaluating and pursuing new technologies, anthe feasibility, and a risk assessment and cost analyspotential solutions.
Current Status 

• TSD will have a summary report of all current an

evolving technological advances completed by t2018.

• The report will inform the anticipated Prize Com

to solicit new and innovative technologies.

• Conduct an analysis of the feasibility, and a risk

assessment and cost analysis for any potential s
Temperature modeling was conducted to determine

release temperature using half, full bypass and withat three reservoir elevation.

• ≈3700 ft ‐ 2004• ≈3600 ft  ‐ 2018, 2012 and 2016• ≈3550 ft – 2007, 2009
Methodology (similar to Temperature

Projections for 24 month Study)• Select Year with similar elevations between March and Ju

determine initial condition Profiles, use January through J

historical data

• Select historical Water Year that best matches projected in

remaining model dates (adjusted)

• Use meteorological and Inflow Temperature Data from a s

historical year
I f 

I I I I 

I X I X I 

I 

I X X 

I X I I 

I I I I I 

I I I 

r r r r r r 

16 

Surface elevation 

≈3700 August

November

Tem ∆p C

o Bypass 8.72

alf 

ypass

7.08 1.64

ull Bypass 6.58 2.14

August

o Bypass 9.96

alf 

ypass

9.25 0.71

ull Bypass 9.01 0.95

141210

86420 

MAM J J A S OND J FMAM 

Temperature C

3700 ft Elevaton GCD Outflow Temperatu

No BypassSingle Bypass (7500cfs)Double Bypass (15000cfs)

Start of Bypass 

Scenarios
X 

X 

X 

X X 

X 

X 

X X 

X 

T T T T T 

Surface elevation 

≈3600 

November

Tem

∆

p C

No Bypass

12.48

Half Bypass

10.63 1.85

Full Bypass

9.82 2.66

September

No Bypass

12.80

Half Bypass

10.64 2.16

Full Bypass

10.4 2.4

3600 ft Elevaton GCD Outflow Temperatures

16141210

86420 

MAM J J A

S

O

N

D J F MAM J 

Temperature C

No Bypass Single Bypass (75Double Bypass (15000cfs) Surface Elevation

Start of Bypass 

Scenarios
X X 

X 

X X 

Surface elevation ≈ 

3550 

October

Temp C ∆

No Bypass

14.92

Half Bypass

11.64 3.28

Full Bypass

11.42 3.50

August

No Bypass

14.01

Half Bypass

11.31 2.7

Full Bypass

11.31 2.7

16141210

86420

Temperature C

3550 ft Elevation GCD Out

No BypassSingle Bypass (7500cfs)Double Bypass (15000cfs)

MAM J J A S OND J FMA
\ 0 \ 

Temperature, °C

22201816141210

86

Colorado River, Grand Canyon Water Temperatures

Projections based on 3550 ft No Bypass

Month
0 

Temperature, °C

22201816141210

86

Colorado River, Grand Canyon Water Temperatures

Projections based on 3550 ft Single Bypass

Month
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

0 

Colorado River, Grand Canyon Water Temperatures 

Projections based on 3550 ft Double Bypass 

Temperature, °C

22201816141210

86

Month 
Downstream Temperatures 

Using No Bypass, Half Bypass and Full Bypass

Surface elevation ≈ 3550 ft.

August

Location No Bypass Half Bypass

∆ Full Bypass

RM‐0 Lees Ferry 11.0 11.0

0 10.0 

RM‐30 12.0 12.0

0 11.0 

RM‐61 LCR 15.0 13.0 2.0 12.0 

RM‐87 BrightAngel

15.5 14.5 1.0 15.0 

RM‐166 Fern Glen 15.8 15.8

0 15.0 

/ _________________________ "\ ________________________________________________________ ....... 7 --- .._ --- \. 

V -------------------------------- "~\ ___________________________________________ / 

- ~ / ~ 

/2 ~~------ --- ~ ·------ -------- --------- --------~ ~ - ........ 

",/' __,.,,,-- .__ -- J ./ / 

-~~ ---------------------------~ ~ --------- ~ ~ 

--------------------------------------------------------- ~ _::- ~ ....-

Colorado River, Grand Canyon Water Temperatures

Projections based on 3600 ft elev No Bypass

Temperature, °C

22201816141210

86

RM 0‐CR@ LeesFerryRM 30‐CR@ 20 miCanyon

Month
....... 

....... 

Colorado River, Grand Canyon Water Temperatures

Projections based on 3600 ft elev Single Bypass

Temperature, °C

22201816141210

86

RM 0‐CR@ LeesFerryRM 30‐CR@ 20 miCanyon

Month
....... 

....... 

Colorado River, Grand Canyon Water Temperatures

Projections based on 3600 ft Elev Double Bypass

Temperature, °C

22201816141210

86

RM 0‐CR@ LeesFerryRM 30‐CR@ 20 miCanyon

Month
---- 1~----------------------------------------------------------------------------------- ....... 

-/ --... -· \_L ---- -------- -------- -------- -------- -------- --------- -------- -------- -------

'~" ------- -------- --",---- -------- -------- --------- -------- 7 S, ....... 

r ---~ ~""~ --------- -- ____. 

= ---- ------- ------- --~ ~ I~ ~ ---- ~ -~ES:-= 

- ~ 

~r 

Colorado River, Grand Canyon Water Temperatures

Projections based on 3700 ft Single Bypass

Temperature, °C

22201816141210

864

RM 0‐CR@ LeesFerryRM 30‐CR@ 20 miCanyon

Month
- /"\. ------------------------------------------------------------------------------- ....... 

/ Jr'\. ·'--______ --------c~ ------- -------- -------- --------- -------- -------- 7 

I L 

________ ________ 

-------- ~ '\.. ____________________________ --------~ / 1 · ~, ,) ........ 

, /:~ --"'"~ K. - -- -~ d~ 

~ - -------------------- --~ --

Colorado River, Grand Canyon Water Temperatures

Projections based on 3700 ft No Bypass

Temperature, °C

22201816141210

864

RM 0‐CR@ LeesFerryRM 30‐CR@ 20 miCanyon

Month
---- 1~----------------------------------------------------------------------------------- ....... 

-/ ----· \ ...... -----------------------------------------------------------------------------

1~ " ------- -------- ", ----- -------- -------- --------- -------- 7 ..--:. ....... 

r ---~ ------- -------- --~ ~ ---- -------- --- -/2V ____. 

= --~--------- -------- ----- --,~~ ~-----

Colorado River, Grand Canyon Water Temperatures

Projections based on 3700 ft Double Bypass

Temperature, °C

22201816141210

864

RM 0‐CR@ LeesFerryRM 30‐CR@ 20 miCanyon

Month