[Section 1.01] of the Credit Agreement is hereby amended to delete the definitions of “Applicable Rate” and “Interest Period” in their entirety and replace such definitions with the following:

[Section 1.01] of the Credit Agreement is hereby amended by inserting the following definitions in the appropriate alphabetical order to read as follows:

[Section 1.44] (definition of Stability Period) shall be amended in its entirety, to read as follows:

[Section 1.01] is hereby amended by adding language to the end there of the as follows:

[Section 1.1] of the Existing Credit Agreement is hereby amended by adding the following clause to the end of the definition of “Specified Transactions” immediately before the period:

[Section 1.2] of the Plan is amended to add the following sentence to the end thereof:

[Section 1.1(a)] of the Warrant is hereby amended as follows: the words “on or after the Stockholder Approval Date and” are hereby deleted.

[Section 1.01] of the Financing Agreement (Definitions) is hereby amended by amending and restating the definition of “Subordinated Indebtedness” in its entirety to read as follows:

[Section 1.01] of the Credit Agreement is hereby amended by amending and restating the following defined terms in their entirety as follows:

[Section 1.01] of the Credit Agreement is hereby amended by replacing [clause (a)] of the definition of “Issuing Lender” with the following: “(a) each of JPMorgan Chase Bank, N.A. and Barclays Bank PLC, each in its capacity as an issuer of Letters of Credit (and each of their respective successors in such capacity as provided in [Section 2.04(j)]),”.

[Section 1.1] (Certain Defined Terms) of the Credit Agreement is hereby amended by replacing the defined terms “Commitment” and “Fee Letter” in their entirety with the following:

[Section 1.1] of the Existing Credit Agreement is hereby amended by deleting the definition “Sanctioned Entity” where it appears therein.

[Section 1.3] of the Business Financing Agreement is hereby amended to read as follows:

Under Treasury Regulations Section 1.1502-77(a), SMBC is the agent for all the Members and is required to act for the Affiliated Group in connection with matters relating to the consolidated tax liability of the Affiliated Group. In particular, SMBC shall be responsible for filing returns with the Internal Revenue Service, making elections, receiving all correspondence, filing claims for refund, contesting proposed

#[Section 1] of the Security Agreement (Definitions) is hereby amended by adding the following new defined terms thereto:

Effective ​, [Section 6.3] is replaced in its entirety as follows:

-1 Introduction Knife River Corporation (which shall be renamed as KRC Materials, Inc, on or after the Knife River Spinoff Effective Date) hereby establish a retirement contribution feature as described in this [Schedule D1] The retirement contribution feature shall be in addition to all other contributions provided pursuant to the Plan