April 16, 2019

Bradley C. Barron
President and Chief Executive Officer
NuStar Energy L.P.
19003 IH-10 West
San Antonio, TX 78257

       Re: NuStar Energy L.P.
           Registration Statement on Form S-3
           Filed April 12, 2019
           File No. 333-230823

Dear Mr. Barron:

       This is to advise you that we have not reviewed and will not review your
registration
statement.

        Please refer to Rules 460 and 461 regarding requests for acceleration.
We remind you
that the company and its management are responsible for the accuracy and
adequacy of their
disclosures, notwithstanding any review, comments, action or absence of action
by the staff.

       Please contact Lisa Krestynick, Staff Attorney, at 202-551-3056 with any
questions.



                                                            Sincerely,

                                                            Division of
Corporation Finance
                                                            Office of Natural
Resources