6.10.10Attachment 4 – Rate Mechanism for the Recovery by Consolidated Edison Company of New York, Inc.

6.10.10.1Applicability

This Attachment 4 to Rate Schedule 10 of the ISO OATT establishes the RTFC for the recovery of costs for projects undertaken by Consolidated Edison Company of New York, Inc. (“Con Edison”) that are eligible for cost recovery pursuant to Rate Schedule 10.  The projects subject to this Attachment 4 to Rate Schedule 10 of the ISO OATT are as follows:

• Con Edison’s Designated Public Policy Project that is a portion of the Public Policy Transmission Project selected by the ISO Board of Directors in response to the Long Island Offshore Wind Export Public Policy Transmission Need and identified in a decision and Public Policy Transmission Planning Report dated June 13, 2023, and any Designated Network Upgrade Facilities associated with such Public Policy Transmission Project selected by the ISO Board of Directors (“Con Edison Long Island PPTN Project Facilities”).

For purposes of Rate Schedule 10 of the ISO OATT: (i) each project identified above shall constitute an applicable “Eligible Project”; and (ii) Con Edison shall constitute the applicable “Transmission Owner” to recover costs for each such project through the RTFC.

6.10.10.2Project Revenue Requirement

For purposes of Rate Schedule 10 of the ISO OATT, the revenue requirement for each Eligible Project shall be determined using the formula rate template (Section 6.19.8.2.2 of Attachment 3 to Rate Schedule 19 of the ISO OATT) and formula rate implementation protocols (Section 6.19.8.2.1 of Attachment 3 to Rate Schedule 19 of the ISO OATT) set forth in Attachment 3 to Rate Schedule 19 of the ISO OATT.  The revenue requirement for each Eligible Project shall be stated separately within Worksheet 10b of Con Edison’s formula rate template (as set forth in Section 6.19.8.2.2 of Attachment 3 to Rate Schedule 19 of the ISO OATT), and there shall be no duplicative recovery of costs as between the revenue requirement for each Eligible Project hereunder or any other Con Edison project-specific revenue requirement recovered through the ISO OATT.

6.10.10.3Project Cost Allocation

The costs of each project eligible for recovery pursuant to Rate Schedule 10 of the ISO OATT shall be allocated to Responsible LSEs as follows:

• For the Con Edison Long Island PPTN Project Facilities, eligible costs shall be allocated in accordance with the approved cost allocation methodology for the Public Policy Transmission Project selected by the ISO Board of Directors to address Long Island Offshore Wind Export Public Policy Transmission Need.