Transmission Studies for New Long Term Network Resources

Doug PowellManager Technical System Planning

Entergy Services, Inc. September 11, 2006

Two options for designating new Long-Term Network Resources

1. Incremental: Customer requests designation of new generation in addition to existing Network Resources.

2. Delisting/displacement: Customer requests designation of new generation replacing existing Network Resources.

Incremental Study

• New resource will be studied in addition to customer’s existing Network Resources.

• All network service studies will be performed on an incremental basis, unless service request specifies otherwise.

Delisting/Displacement Study

• Delisting study evaluates a new generation resource as a long-term replacement for an existing Network Resource.

• Displacement study evaluates a new generation resource as a short-term substitution for an existing Network Resource.

Delisting/Displacement Studies

• Performed at Customer’s election.

• Customer provides list of Network Resources to de-list/displace or Entergy Transmission can provide the delisting/displacement options for Customer.

Batching of Requests

• Customer can elect to have all or a portion of its requests to designate new Network Resources “batched.”

• Transmission will perform all studies in the specified “batch” and release the completed System Impact Studies (“SIS”) at one time.

• Only requests that are in consecutive order in the SIS queue can be “batched.”

Under the ICT

• The ICT will administer the Operating Companies’ OASIS

• The ICT will sign the SIS Agreement with customer and perform the System Impact Study

• To the extent a Facility Study is necessary and requested, Entergy transmission will conduct the study, subject to the validation of the ICT.

Questions??

Timing of SIS • Transmission customer applies for transmission service

in OASIS. N/A• Entergy will forward System Impact Study Agreement

including estimated study cost and time required for completion. Within 30 Days

• Transmission customer returns executed Study Agreement to Entergy. Within 15 Days

• Entergy completes System Impact Study; Entergy approves or denies request for transmission service, or provides Facilities Study Agreement. Within 60 Days, if possible If request approved,

• Transmission Customer returns completed Service Agreement. Within 15 Days