Wyoming Interstate Company, Ltd.

Second Revised Volume No. 2

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Effective Date: 04/12/2010, Docket: RP10-491-000, Status: Effective

Twenty-Eighth Revised Sheet No. 4C Twenty-Eighth Revised Sheet No. 4C

Superseding: Substitute Twenty-Seventh Revised Sheet No. 4C

STATEMENT OF RATES FOR TRANSPORTATION OF NATURAL GAS

RATES PER DTH

Current

Particulars Reimbursement True-up Total

----------- ------------- ---------- -----

Mainline System

Fuel Gas Percentage (Note 3)............................ 0.62% 0.26% 0.88%

L&U Percentage (Note 3)................................. 0.12% 0.04% 0.16%

----- ------ -----

Total FL&U Percentage................................... 0.74% 0.30% 1.04%

L&U Percentage (Note 11)................................ 0.12% 0.04% 0.16%

Powder River Incremental

Fuel Gas Percentage (Note 3) (Note 4)................... 0.94% -0.18% 0.76%

L&U Percentage (Note 3) (Note 4)........................ 0.13% -0.01% 0.12%

----- ------ -----

Total FL&U Percentage................................... 1.07% -0.19% 0.88%

L&U Percentage (Note 11)................................ 0.13% -0.01% 0.12%

Medicine Bow Incremental

Fuel Gas Percentage (Note 3) (Note 6)................... 0.37% 0.06% 0.43%

L&U Percentage (Note 3) (Note 6)........................ 0.13% -0.09% 0.04%

----- ------ -----

Total FL&U Percentage................................... 0.50% -0.03% 0.47%

L&U Percentage (Note 11)................................ 0.13% -0.09% 0.04%

Echo Springs Incremental

Fuel Gas Percentage (Note 3) (Note 8)................... 0.74% 0.36% 1.10%

L&U Percentage (Note 3) (Note 8)........................ 0.00% 0.00% 0.00%

----- ------ -----

Total FL&U Percentage................................... 0.74% 0.36% 1.10%

L&U Percentage (Note 11)................................ 0.00% 0.00% 0.00%