EIGHTH SUPPLEMENTAL INDENTURE

Exhibit 4.1i

EIGHTH SUPPLEMENTAL INDENTURE

THIS EIGHTH SUPPLEMENTAL INDENTURE dated as of November ___, 2008 among CRC Health Corporation, a Delaware corporation (the “ Company ”), the Guarantors, CRC Holdings, LLC, a Delaware limited liability company (the “ New Guarantor ”) and U.S. Bank National Association, as trustee (the “ Trustee ”).

WHEREAS, the Company and the Guarantors have heretofore executed and delivered to the Trustee an indenture dated as of February 6, 2006 (the “ Indenture ”), providing for the issuance of $200 million aggregate principal amount of the Company’s 10.75% Senior Subordinated Notes due 2016 (the “ Notes ”), as supplemented by the First Supplemental Indenture, dated as of July 7, 2006 (the “ First Supplemental Indenture ”), the Second Supplemental Indenture, dated as of September 28, 2006 (the “ Second Supplemental Indenture ”), the Third Supplemental Indenture, dated as of October 24, 2006 (the “ Third Supplemental Indenture ”), the Fourth Supplemental Indenture, dated as of November 17, 2006 (the “ Fourth Supplemental Indenture ”), the Fifth Supplemental Indenture, dated as of April 27, 2007 (the “ Fifth Supplemental Indenture ”), the Sixth Supplemental Indenture, dated as of July 26, 2007 (the “ Sixth Supplemental Indenture ”), and the Seventh Supplemental Indenture, dated as of May 29, 2008 (the “ Seventh Supplemental Indenture ”);

WHEREAS, the Company and the Guarantors propose to further amend and supplement the Indenture to join the New Guarantor, an indirect subsidiary of the Company, as a party to the Indenture, as a Guarantor thereunder;

WHEREAS, pursuant to Section 8.01 of the Indenture, the Company and the Trustee may amend, waive or supplement the Indenture, the Notes or the Guarantees without the consent of any Holders to make any change that would provide additional rights or benefits to the holders of Notes or that does not adversely affect the legal rights under the Indenture of any such holder;

WHEREAS, the Company, each Guarantor and the New Guarantor have been authorized by their respective board of directors, managers, members, partners, or general partners, as applicable, to enter into this Eighth Supplemental Indenture;

WHEREAS, all other acts and proceedings required by law, by the Indenture and by the respective certificates of incorporation, certificates of formation, limited liability company agreements, partnership agreements, limited partnership agreements, by-laws and other organizational documents of the Company, each Guarantor and the New Guarantor to make this Eighth Supplemental Indenture a valid and binding agreement for the purposes expressed herein, in accordance with its terms, have been duly performed;

WHEREAS, pursuant to Section 8.06 of the Indenture, the Trustee is authorized to execute and deliver this Eighth Supplemental Indenture;

WHEREAS, the Company hereby requests that the Trustee execute and deliver this Eighth Supplemental Indenture;

NOW, THEREFORE, for in consideration of the premises herein contained and in order to effect the proposed amendment to join the New Guarantor to the Indenture pursuant to Section 8.01 of the Indenture, the Company, the New Guarantor and the Guarantors agree with the Trustee as follows:

ARTICLE I

Amendment of Indenture

ARTICLE II

Miscellaneous Provisions