High Island Offshore System, L.L.C.

Third Revised Volume No. 1

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Effective Date: 09/29/2010, Docket: RP03-221-013, Status: Effective

Tenth Revised Sheet No. 10 Tenth Revised Sheet No. 10

Superseding: Ninth Revised Sheet No. 10

SCHEDULE OF RATES AND CHARGES 3/

Maximum Minimum

Rate Rate

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

Long Haul Rates 2/

Rate Schedule FT-1

1) Reservation Rate $ 12.0146 $ .0000

2) Commodity Rate $ .0000 $ .0000

3) Overrun/Volumetric Rate 1/ $ .3950 $ .0000

Rate Schedule FT-2

1) Reservation Rate $ 12.0146 $ .0000

2) Commodity Rate $ .0000 $ .0000

3) Overrun/Volumetric Rate 1/ $ .3950 $ .0000

Rate Schedule IT

1) Commodity Rate $.3950 $ .0000

Short Haul Rates

Rate Schedule FT-1

1) Reservation Rate $ 2.9200 $ .0000

2) Commodity Rate $ .0000 $ .0000

3) Overrun/Volumetric Rate 1/ $ .0960 $ .0000

Rate Schedule FT-2

1) Reservation Rate $ 2.9200 $ .0000

2) Commodity Rate $ .0000 $ .0000

3) Overrun/Volumetric Rate 1/ $ .0960 $ .0000

Rate Schedule IT

1) Commodity Rate $.0960 $ .0000

1/ This rate applicable for releases of firm capacity on a volumetric basis.

2/ Any Shipper that contracts for its receipts and deliveries at HIOS gathering facilities

located at or south of High Island Block 264 shall receive a per Dth credit to its Long

Haul rate equal to the applicable Short Haul rate.

3/ Subject to HIOS's right to withdraw this tariff sheet and reinstate its previously

effective subject-to-refund rates, effective as of April 1, 2010, in the event that the

settlement currently pending Commission approval in Docket No. RP09-487-000 does not

become effective as of such date.