UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: April 29, 2011 3:00 P.M.
Form: S-3
CIK: 0001110805
Company Name: NuStar Energy L.P.
File Number: 333-173510
CIK: 0001294683
Company Name: NuStar Logistics, L.P.
File Number: 333-173510-02
CIK: 0001399747
Company Name: NuStar Pipeline Operating Partnership L.P.
File Number: 333-173510-01