UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________________

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities

Exchange Act of 1934

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Date of Report (date of earliest event reported):  September 15, 2014

WAUSAU PAPER CORP.

(Exact name of registrant as specified in its charter)

WISCONSIN	1-13923	39-0690900
(State or other	(Commission File	(IRS Employer
jurisdiction of	Number)	Identification
incorporation)		Number)

100 PAPER PLACE

MOSINEE, WI 54455-9099

(Address of principal executive offices, including Zip Code)

(715) 693-4470

(Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

£

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 23.425)

£

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

£

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

£

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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INFORMATION TO BE INCLUDED IN THE REPORT

Section 1 –Business & Operations

Item 1.01.

Entry into a Material Definitive Agreement

First Amendment to Credit Agreement

On September 15, 2014, Wausau Paper Corp. (the “Company”) and its subsidiaries entered into a First Amendment to Credit Agreement (the “Credit Agreement Amendment”) with Bank of America, N.A. and BMO Harris Bank National Association (collectively, the “Lenders”).

The Credit Agreement Amendment amended the terms of the original Credit Agreement that the Company entered into with the Lenders on July 30, 2014 ( the “Original ABL Credit Agreement”).  The Credit Agreement Amendment revised certain definitions relating to outstanding letters of credit issued for the benefit of the Company and provided that those outstanding letters of credit are subject to the terms of the Original ABL Credit Agreement, as amended by the Credit Agreement Amendment.

The foregoing description of the Credit Agreement Amendment is qualified in its entirety by reference to the complete terms of the Credit Agreement Amendment, a copy of which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference, as well as the Original Credit Agreement, a copy of which was filed as Exhibit 10.3 to the Company’s Current Report on Form 8-K dated July 30, 2014.

Section 9 – Financial Statements and Exhibits

Item 9.01

Financial Statements and Exhibits

Exhibit 10.1

First Amendment to Credit Agreement dated as of September 15, 2014

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

WAUSAU PAPER CORP.

Date:  September 18, 2014

By:  SHERRI L. LEMMER

Sherri L. Lemmer

Senior Vice President–Finance

Chief Financial Officer

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EXHIBIT INDEX

to

FORM 8-K

of

WAUSAU PAPER CORP.

dated September 15, 2014

Pursuant to Section 102(d) of Regulation S-T

(17 C.F.R. Section 232.102(d))

Exhibit 10.1

First Amendment to Credit Agreement dated as of September 15, 2014

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