FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Ball Darin Robert   2. Issuer Name and Ticker or Trading Symbol POTLATCH CORP [PCH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP of Resource (Last) (First) (Middle) 601 WEST FIRST AVENUE, SUITE 1600 3. Date of Earliest Transaction (Month/Day/Year) 02/15/2018 (Street) SPOKANE, WA 99201 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/15/2018   A   1,353.262 (1) A $ 0 5,780.0601 (2) D   Common Stock 02/15/2018   A   1,325 (3) A $ 0 7,105.0601 D   Common Stock 02/16/2018   S   497.424 (4) D $ 54.4306 6,607.6361 D   Common Stock 02/16/2018   S   122.576 (5) D $ 54.4306 6,485.0601 D   Common Stock               69 I 401K (6)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Ball Darin Robert 601 WEST FIRST AVENUE SUITE 1600 SPOKANE, WA 99201			VP of Resource

Signatures

Lorrie D. Scott Attorney-in-Fact		02/20/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Represents shares of common stock in settlement of 2015-2017 Performance Share Grant.
(2)	Includes adjustments for dividends accrued.
(3)	Represents award of restricted stock units (RSUs) that may be settled only for shares of common stock on a one-for-one basis. The RSUs will vest on December 31, 2020, subject to continued employment through such date. During the vesting period, an amount equal to the dividends that would have been paid on the RSU's had they been in the form of common stock will be converted into additional RSU's. The additional RSU's will also vest December 31, 2020.
(4)	Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of the Performance Shares listed in Table I. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.
(5)	Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of the RSU's listed in Table I. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person.
(6)	Reflects periodic contributions to the issuer's common stock fund in the issuer's 401(k) plan.
Remarks: Darin R. Ball C/O Potlatch Corporation 601 West First Ave Suite 1600 Spokane, WA 99201

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