SECURITIES AND EXCHANGE COMMISSION
    
    Washington, D.C. 20549
    
    SCHEDULE 13G
    
    Under the Securities Exchange Act of 1934
    
    (Amendment No:  4)
    
    BLACK HILLS CORP.
    --------------------------------------------------------
    (Name of Issuer)
    
    Common Stock
    --------------------------------------------------------
    (Title of Class of Securities)
    
    092113109
    --------------------------------------------------------
    (CUSIP Number)
    
    December 31, 2013
    --------------------------------------------------------
    (Date of Event Which Requires Filing of this Statement)
    
    Check the appropriate box to designate the rule pursuant to
    which this Schedule is filed:
    
    [X] Rule 13d-1(b)
    [ ] Rule 13d-1(c)
    [ ] Rule 13d-1(d)
    
    
    *The remainder of this cover page shall be filled out
    for a reporting person's initial filing on this form with
    respect to the subject class of securities, and for any
    subsequent amendment containing information which
    would alter the disclosures provided in a prior cover page.
    
    The information required in the remainder of this cover
    page shall not be deemed to be "filed" for the purpose
    of Section 18 of the Securities Exchange Act of 1934
    ("Act") or otherwise subject to the liabilities of that
    section of the Act but shall be subject to all other
    provisions of the Act (however, see the Notes).
    
    
    
    
    
    CUSIP No.   092113109
    
    (1)Names of reporting persons. BlackRock, Inc.
    
    
    (2) Check the appropriate box if a member of a group
    (a) [  ]
    (b) [X]
    
    
    (3) SEC use only
    
    (4) Citizenship or place of organization
    
    Delaware
    
    Number of shares beneficially owned by each reporting person with:
    
    (5) Sole voting power
    
     5953353
    
    (6) Shared voting power
    
         None
    
    (7) Sole dispositive power
    
     6096705
    
    (8) Shared dispositive power
    
         None
    
    (9) Aggregate amount beneficially owned by each reporting person
    
     6096705
    
    (10) Check if the aggregate amount in Row (9) excludes certain shares
    
    (11) Percent of class represented by amount in Row 9
    
    13.7%
    
    (12) Type of reporting person
    
    HC
    
    
    
    
    
    Item 1.
    
    Item 1(a) Name of issuer:
    -----------------------------------------------------------------------
    
    BLACK HILLS CORP.
    
    Item 1(b) Address of issuer's principal executive offices:
    -----------------------------------------------------------------------
    
    625 Ninth Street
    Rapid City SD 57701
    
    
    Item 2.
    
    
    2(a) Name of person filing:
    ----------------------------------------------------------------------
    BlackRock, Inc.
    
    
    2(b) Address or principal business office or, if none, residence:
    -----------------------------------------------------------------------
    BlackRock Inc.
    40 East 52nd Street
    New York, NY 10022
    
    
    2(c) Citizenship:
    --------------------------------------------------------------------
     See Item 4 of Cover Page
    
    
    2(d) Title of class of securities:
    -------------------------------------------------------------------
    
    Common Stock
    
    
    2(e) CUSIP No.:
    See Cover Page
    
    
    
    
    
    
    Item 3.
    
    If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c),
    check whether the person filing is a:
    [ ] Broker or dealer registered under Section 15 of the Act;
    [ ] Bank as defined in Section 3(a)(6) of the Act;
    [ ] Insurance company as defined in Section 3(a)(19) of the Act;
    [ ] Investment company registered under Section 8 of the
    Investment Company Act of 1940;
    [ ] An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
    [ ] An employee benefit plan or endowment fund in accordance with
                Rule 13d-1(b)(1)(ii)(F);
    [X] A parent holding company or control person in accordance with
                Rule 13d-1(b)(1)(ii)(G);
    [ ] A savings associations as defined in Section 3(b) of the Federal
                Deposit Insurance Act (12 U.S.C. 1813);
    [ ] A church plan that is excluded from the definition of an
                investment company under section 3(c)(14) of the Investment Company
                Act of 1940;
    [ ] A non-U.S. institution in accordance with
                Rule 240.13d-1(b)(1)(ii)(J);
    [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing
                as a non-U.S. institution in accordance with
                Rule 240.13d-1(b)(1)(ii)(J), please specify the type of
                institution:
    
    
    Item 4. Ownership
    
    Provide the following information regarding the aggregate number
    and percentage of the class of securities of the issuer identified in Item 1.
    
    
    Amount beneficially owned:
    
      6096705
    
    Percent of class
    
    13.7%
    
    Number of shares as to which such person has:
    
    Sole power to vote or to direct the vote
    
     5953353
    
    Shared power to vote or to direct the vote
    
    None
    
    Sole power to dispose or to direct the disposition of
    
    6096705
    
    Shared power to dispose or to direct the disposition of
    
    None
    
    
    
    
    
    
    
    
    
    Item 5.
    
    Ownership of 5 Percent or Less of a Class. If this statement is being
    filed to report the fact that as of the date hereof the reporting person
    has ceased to be the beneficial owner of more than 5 percent of the
    class of securities, check the following [  ].
    
    
    Item 6. Ownership of More than 5 Percent on Behalf of Another Person
    
    If any other person is known to have the right to receive or the power
    to direct the receipt of dividends from, or the proceeds from the sale
    of, such securities, a statement to that effect should be included in
    response to this item and, if such interest relates to more than 5 percent
    of the class, such person should be identified. A listing of the
    shareholders of an investment company registered under the Investment
    Company Act of 1940 or the beneficiaries of employee benefit plan,
    pension fund or endowment fund is not required.
    
    
    The interest of one such person, iShares Select Dividend ETF,
     in the common stock of BLACK HILLS CORP is more than
    five percent of the total outstanding common stock.
    
    
    
    Item 7. Identification and Classification of the Subsidiary Which
    Acquired the Security Being Reported on by the Parent Holding
    Company or Control Person.
    
    
    See Exhibit A
    
    
    Item 8. Identification and Classification of Members of the Group
    
    
    If a group has filed this schedule pursuant to Rule 13d-1(b)(ii)(J),
    so indicate under Item 3(j) and attach an exhibit stating the identity
    and Item 3 classification of each member of the group. If a group
    has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d),
    attach an exhibit stating the identity of each member of the group.
    
    
    Item 9. Notice of Dissolution of Group
    
    Notice of dissolution of a group may be furnished as an exhibit
    stating the date of the dissolution and that all further filings with
    respect to transactions in the security reported on will be filed,
    if required, by members of the group, in their individual capacity.
    
    See Item 5.
    
    Item 10. Certifications
    By signing below I certify that, to the best of my knowledge and
    belief, the securities referred to above were acquired and are
    held in the ordinary course of business and were not acquired
    and are not held for the purpose of or with the effect of changing
    or influencing the control of the issuer of the securities and were
    not acquired and are not held in connection with or as a participant
    in any transaction having that purpose or effect.
    
    Signature.
    
    After reasonable inquiry and to the best of my knowledge and
    belief, I certify that the information set forth in this statement
    is true, complete and correct.
    
    
    Dated: January 08, 2014
    BlackRock, Inc.
    
    
    Signature:  Matthew J. Fitzgerald
    
    
    
    -------------------------------------------
    
    Name/Title  Attorney-In-Fact
    
    
    The original statement shall be signed by each person on whose
    behalf the statement is filed or his authorized representative.
    If the statement is signed on behalf of a person by his authorized
    representative other than an executive officer or general partner
    of the filing person, evidence of the representative's authority to
    sign on behalf of such person shall be filed with the statement,
    provided, however, that a power of attorney for this purpose
    which is already on file with the Commission may be incorporated
    by reference. The name and any title of each person who
    signs the statement shall be typed or printed beneath his signature.
    
    
    
    Attention: Intentional misstatements or omissions of fact constitute
    Federal criminal violations (see 18 U.S.C. 1001).
    
    
    Exhibit A
    
    
    
    
    Subsidiary
    
    BlackRock Advisors (UK) Limited
    BlackRock Advisors, LLC
    BlackRock Asset Management Canada Limited
    BlackRock Asset Management Deutschland AG
    BlackRock Financial Management, Inc.
    BlackRock Fund Advisors*
    BlackRock Fund Management Ireland Limited
    BlackRock Institutional Trust Company, N.A.
    BlackRock International Limited
    BlackRock Investment Management (Australia) Limited
    BlackRock Investment Management (UK) Ltd
    BlackRock Investment Management, LLC
    
    
    *Entity beneficially owns 5% or greater of the outstanding
    shares of the security class being reported on this
    Schedule 13G.
    Exhibit B
    
    
    POWER OF ATTORNEY
    
    The undersigned, BLACKROCK, INC., a corporation duly organized
    under the laws of the State of Delaware, United States (the
    "Company"), does hereby make, constitute and appoint each of
    Matthew Mallow, Howard Surloff, Edward Baer, Bartholomew Battista,
    Dan Waltcher, Karen Clark, Daniel Ronnen, John Stelley, Brian Kindelan,
    John Blevins, Richard Froio, Matthew Fitzgerald and Con Tzatzakis acting
    severally, as its true and lawful attorneys-in-fact, for the purpose of,
    from time to time, executing in its name and on its behalf, whether the
    Company is acting individually or as representative of others, any and
    all documents, certificates, instruments, statements, other filings and
    amendments to the foregoing (collectively, "documents") determined by
    such person to be necessary or appropriate to comply with ownership or
    control-person reporting requirements imposed by any United States
    or non-United States governmental or regulatory authority, including
    without limitation Forms 3, 4, 5, 13D, 13F, 13G and 13H and any
    amendments to any of the foregoing as may be required to be filed
    with the Securities and Exchange Commission, and delivering,
    furnishing or filing any such documents with the appropriate
    governmental, regulatory authority or other person, and giving and
    granting to each such attorney-in-fact power and authority to act in
    the premises as fully and to all intents and purposes as the Company
    might or could do if personally present by one of its authorized
    signatories, hereby ratifying and confirming all that said
    attorney-in-fact shall lawfully do or cause to be done by
    virtue hereof. Any such determination by an attorney-in-fact named
    herein shall be conclusively evidenced by such person's execution,
    delivery, furnishing or filing of the applicable document.
    
    This power of attorney shall expressly revoke the power of attorney
    dated 30th day of November,2011 in respect of the subject matter hereof,
    shall be valid from the date hereof and shall remain in full force and
    effect until either revoked in writing by the Company, or, in respect of
    any attorney-in-fact named herein, until such person ceases to be an
    employee of the Company or one of its affiliates.
    
    IN WITNESS WHEREOF, the undersigned has caused this power of
    attorney to be executed as of this 10th day of July, 2012.
    
    BLACKROCK, INC.
    
    
    By:_ /s/ Chris Leavy
    Name: Chris Leavy
    Title: Chief Investment Officer