This page contains preliminary Billing data postings for Operating Reserves, Regulation and Synchronized Reserves.

Reconciliation Billing Determinants
Preliminary Operating Reserves Rates 

Regulation Zone Preliminary Billing Data
PJM Mid-Atlantic Region (Pre-August 2005) 
PJM 
PJM Western Region (Pre-August 2005) 
ComEd (Pre-October 2004)

Synchronized Reserve Zone Preliminary Billing Data
Preliminary (Pre-May 2004)
PJM Mid-Atlantic Region (Pre-February 2007)
PJM Western Region (Pre-February 2007)
ComEd (Pre-February 2007) 
Dominion 
RFC Synchronized Reserve

Day-Ahead Scheduling Reserve Preliminary Billing Data