Tri-State’s most recent transmission plan, within the Rule 3627, use load forecast data. Base forecast data for these plans is available in Appendix A of Tri-State’s Electric Resource Plan Annual Progress Report (“ERP/APR”)

For more up to date information on Base Forecast, click here www.tristate.coop/resource-planning.

The most current information on Open Access Transmission Tariff (OATT), Large Generator Interconnection Procedures (LGIP), Small Generator Interconnection Procedures (SGIP), and Facility Interconnection Requirements can be accessed Tri-State's Open Access Same-time Information System (OASIS):

The LGIP, including Large Generator Interconnection Agreement (LGIA) can be found under Attachment N in Tri-State’s OATT. The SGIP, including Small Generator Interconnection Agreement (SGIA) can be found under Attachment O in Tri-State’s OATT. Tri-State’s OATT includes a description of the transmission planning process as Attachment K.

Tri-State’s Facility Rating Methodology and Reliability Criteria are documented in the Engineering Standards Bulletin and can be found on OASIS.

Tri-State’s Transmission Plan, which is comprised of individual projects, provides for an effective utilization of the transmission system on a best-cost basis using the "single-entity concept," which takes into consideration the total costs of Tri-State, the Member, and other affected utilities.

Tri-State is an active participant in regional transmission planning with other area utilities, including the Colorado Coordinated Planning Group and WestConnect.