Total Transmission Capability (TTC), Transmission Reliability Margin (TRM),
and Available Transmission Capability (ATC)
 

Wherever applicable, New England Power Company (NEP) administers its Open Access Transmission Tariff consistent with the services provided under the NEPOOL Open Access Transmission Tariff, administered by ISO-New England. To the extent that NEP is required to calculate the TTC, TRM and ATC for transmission services associated with Hydro Quebec Phase I and II, the methodology described in ISO-New England's document "Total Transmission Capability (TTC), Transmission Reliability Margin (TRM), and Available Transmission Capability (ATC)" will be employed. Please see pages 1-4 of the "TTC, TRM & ATC Determination" document for the applicable methodology.

Click Here to View the TTC, TRM & ATC Determination document (.pdf)