1

Update on Freeze Resistant Stock Tank Savings

November, 2003

2

Background

• Prior RTF meeting adopted “Freeze Resistant Stock Tanks” as new measure eligible for C&R Discount

• Directed staff to develop savings estimates for all heating zones using OTEC metered data as “base”

• Directed staff to develop measure “specifications” with OTEC assistance.

3

Adjustment of Partial Year Metered Use to Full Year Use

Month Metered Days

“Full Season Days

Adjusted Incremental Use (kWh/day)

Use (kWh)

Cumulative Use (kWh)

% of Total

November 0 15 7 105 105 9%

December 23 31 8 248 353 22%

January 31 31 15 465 818 41%

February 28 28 7 196 1,014 17%

March 20 20 6 120 1,134 11%

 Total 102   120 125 9.07   100%

4

Adjustment of OTEC Metered Use Data to Other Heating Zones – Step 1

Mean Monthly Temperatures

Location NOV DEC JAN FEB MAR Average

PDX 39 35 34 36 38 36

SEA 40 36 35 37 38 37

BOI 31 24 22 27 32 27

SPK 32 27 24 29 31 28

MIS 24 17 15 20 25 20

Metered 30 26 24 27 30 27

5

Adjustment of OTEC Metered Use Data to Other Heating Zones – Step 2

Location Average Nov-March

Temp. Relative to Metered Location

Savings

PDX 134% 820

SEA 136% 808

BOI 101% 1090

SPK 104% 1056

MIS 75% 1476

Metered 100% 1100

6

Proposed Savings & Credit by Zone

Zone Annual Savings (kWh)

C&R Discount Credit

Heating Zone 1 900 $ 186

Heating Zone 2 1100 $ 228

Heating Zone 3 1500 $ 311

7

Proposed Specifications

  1.0  Tanks/Fountains shall be enclosed, fully foam-insulated and completely sealed in impact-resistance polyurethane

2.0  Tanks/Fountains shall have elliptical or flap closures that tip easily so animals can drink without resistance

• 3.0  Tanks/Fountains shall be sized in accordance with manufacturer’s specifications for the type and number of animals for which it will be used

4.0  Tanks/Fountains closures shall be insulated by foam insulation or dead air space and seal the opening completely

5.0  Tanks/Fountains water supply shall be hard-piped underground and stubbed up into the insulated portion of the fountain

6.0  Tanks/Fountains shall not contain any type of electric heat

• 7.0 Minimum five-year manufacturer defect warranty