(a) Keep all Property and systems useful and necessary in its business in good working order and condition, ordinary wear and tear excepted ; provided, the Hillsboro Mining Event shall not constitute a default in the observance or performance of this Section 8.6(a) , (b) cause the Deer Run Mine to be constructed, operated and maintained in compliance in all material respects with the Construction Budget (as modified from time to time) and the terms and provisions of all Environmental or Mining Permits and in accordance with Prudent Operating Practice and ; provided, the Hillsboro Mining Event shall not constitute a default in the observance or performance of this Section 8.6(b), (c) maintain with financially sound and reputable insurance companies insurance on all its Property of the type and in at least such amounts and against at least such risks (but including in any event public liability, product liability and business interruption) as are usually insured against in the same general area by companies engaged in the same or a similar business, provided such insurance is available on commercially reasonable terms , which insurance shall name Administrative Agent as lender loss payee and additional insured thereunder (solely with respect to policies insuring Collateral, as defined in the Security Agreement) (and Borrower shall provide Administrative Agent with reasonable evidence of such insurance coverage from time to time and as requested by Administrative Agent) , (d) deliver to Administrative Agent annually copies of all policies maintained in accordance with the terms of this Section 8.6, including all certificates and endorsements respecting such policies, and (e) keep Administrative Agent apprised of the (x) filing of any claims under such policies applicable to the Administrative Agent, and (y) the status of any such claims ; provided that Borrower shall procure and maintain insurance in compliance with this clause (c)  of this Section 8.6 for the preparation plant owned by Borrower at all times from and after the commencement of operation of such preparation plant.