Exhibit 4.6.1 SCHEDULE IDENTIFYING SUBSTANTIALLY IDENTICAL AGREEMENT(S) TO EXHIBIT 4.6 ------------------------------------------------------------------------- Indenture of Trust, Mortgage and Security Agreement (T2), dated as of August 17, 2000,...

                                                                   Exhibit 4.6.1


SCHEDULE IDENTIFYING SUBSTANTIALLY IDENTICAL AGREEMENT(S)  TO EXHIBIT 4.6
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Indenture of Trust, Mortgage and Security Agreement (T2), dated as of August 17,
2000, between Joliet Trust II and the United States Trust Company of New York,
as Lease Indenture Trustee.

This Indenture of Trust, Mortgage and Security Agreement differs from Exhibit
4.6 in the following respects:

                  In the Lessor Notes section (2.2), the initial aggregate
         principal amounts of the Series A and Series B Lessor Notes are
         $57,270,000 and $125,410,000, respectively.

                  In the Miscellaneous section (7.16), the maximum principal
         amount of the Lessor Notes secured by this indenture is $211,738,800.



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