UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	April 8, 2009 2:00 P.M.

Form:	S-4
CIK: 0001131227 Company Name: HORNBECK OFFSHORE SERVICES INC /LA File Number: 333-155437
CIK: 0001159509 Company Name: HORNBECK OFFSHORE SERVICES LLC File Number: 333-155437-06
CIK: 0001159332 Company Name: HORNBECK OFFSHORE OPERATORS, LLC File Number: 333-155437-05
CIK: 0001311888 Company Name: Hornbeck Offshore Transportation, LLC File Number: 333-155437-04
CIK: 0001311889 Company Name: Hornbeck Offshore Trinidad & Tobago, LLC File Number: 333-155437-03
CIK: 0001311887 Company Name: HOS-IV, LLC File Number: 333-155437-02
CIK: 0001163750 Company Name: ENERGY SERVICES PUERTO RICO LLC File Number: 333-155437-01