2023

10-Year
Assessment

Economic planning – 2023

ATC utilizes two methods to determine which projects have the potential for economic benefits:

  1. Stakeholder Input and Analyses
  2. Reliability Project Screening

These methods are described below.

Stakeholder Input and Analyses

In March 2008, Federal Energy Regulatory Commission (FERC) Order 890-A took effect. Order 890-A requires a coordinated, open, and transparent transmission planning process on both a local and regional level. To comply with these requirements, ATC submitted a compliance filing on Order 890-A that provides a timeline of actions to ensure that the economic planning process is both coordinated and open.  ATC has also submitted a compliance filing on Order 1000 that incorporates public policy requirement needs into its economic planning analysis. 

Annually, ATC will use a process with consistent timelines that combines stakeholder input, historical data, future line flow forecasts, and updated information on the electric system to identify transmission upgrades for economic evaluation. 

Each year:

  • During February, we hold an initial stakeholder meeting to review the market congestion summary and potential fixes and to discuss economic study scenarios, drivers, ranges, and assumptions. 
  • By March 1 – we work with stakeholders to request and prioritize new/other economic studies and recommend study assumptions. 
  • By April 15 – we identify preliminary areas of economic study, study assumptions, and models and solicit further comments from stakeholders, including soliciting stakeholders for public policy requirements that drive transmission needs. 
  • By May 15 – we finalize areas of economic study, study assumptions, and models to be used in analysis, including a determination as to why or why not public policy requirements were included in the assumptions. 
  • By November 15 – we provide a summary of the results of the economic analyses to our stakeholders. 

ATC conducts analyses of the projects identified for study over several months’ time and posts the key results, including the extent to which these savings offset project costs. When the expected benefits of a studied project are high enough to justify its costs, the process of developing it as a formal proposal is begun. 

As a result of the 2023 ATC/stakeholder collaborative process, we are performing economic analyses on the following ATC facilities: 

Economic Planning Study Areas
  • Arcadian – Cypress 
  • Whitewater – Bluff Creek 

Studies are performed and results shared with stakeholders over the course of the year. In addition, customers and stakeholders who would like to request specific economic studies can do so if they are willing to pay for the studies and are willing to have the results posted publicly. 

Reliability Project Screening

Economic analyses were performed on 14 projects from the 2022 10-Year Assessment project list to determine whether those projects were candidates for acceleration or deferral based on economic considerations. Please refer Table EP-1 for the list of projects screened. The list of 14 projects was based primarily on the availability of redispatch and capital costs of the projects; however, lower cost projects specifically identified by the ATC planning department were also included in the study. Generation interconnection and distribution interconnection projects were not eligible for inclusion in this list. Further, capacitor bank projects were not considered since the voltage benefits provided were not captured by the PROMOD software analysis. Finally, projects with in-service dates prior to December 2026 were not considered since development of those projects was too far underway to make scheduling changes. As a result of this screening, none of the projects showed significant economic savings to ATC customers. This may change depending on assumptions or modeling of the system. Economic planning will continue to work with reliability planning, if any further analysis needs to be completed. 

A similar analysis will be performed in the 2024 10-Year Assessment based upon the 2023 Assessment project list. 

Table EP-1

Project #ProjectPlanning Zone
1North Central WI Reliability Project 1
2Harrison Tap – Iola 69-kV (Y-70), Rebuild & OPGW1
3Groenier – Rosholt (ALTE) Tap, 69-kV (Y-71), Partial Rebuild and Rerate 1
4Pine Hy Tap – Pine Hy 69-kV (ASPY31-1), Rebuild & OPGW 2
59 Mile SW STA – Pine River 69-kV (6921/23) Partial Rebuild2
6Cornell Tap – Watson Tap 69-kV (Chandler), Partial Rebuild 2
7Chandler-Delta 69-kV (Delta1 and Escanaba1), Partial Rebuild and OPGW 2
8Pine River - Mich Limestone Loading Dock 69-kV (ESE_6906), Rebuild 2
9Gran Grae SS, Install a second 161/69-kV transformer Replacement 3
10Hillman - Darlington 138kV (X-14/X-101), Rebuild 3
11South Fond du Lac - Spring Brook 69-kV (Y-133), Partial rebuild 3
12South Beaver Dam - Hubbard, (Y-134), 69-kV Rebuild & OPGW 3
13South Beaver Dam – North Beaver Dam, 69-kV (Y-59) Line Rebuild 3
14Waupun - South Fond du Lac 69-kV, (Y-25) Partial Rebuild 4
List of 10-Year Assessment 2021 Economically Screened Projects

Meetings and notices

2024 Meetings, Materials and Announcements

March 11, 2024: TYA Stakeholder Meeting

ATC will be hosting a virtual customer/stakeholder meeting on Monday, March 11th, 2024, from 9:00am until 11:00am (CST).

Meeting materials will be posted one (1) week before the meeting is held:

ATC will discuss the:

  • Meeting Agenda
  • 2023 Economic Planning Study Update / 2024 Economic Planning Study Kickoff
  • 2024 10-Year Assessment Preliminary Needs
  • Updated TYA Project List

Please hold this date and time on your calendars if you plan to participate. Feel free to forward to others if we missed someone.

Here is a link to the Microsoft Teams meeting. The standard TYA virtual meeting protocol will be used: presenters will use cameras and microphones, and attendees may ask questions in the chat window.

Please reply with your participation plans by March 4, 2024, to Ted Weber.

2023 Meetings, Materials and Announcements

November 13, 2023: TYA Stakeholder Meeting

ATC is planning to host a customer/stakeholder meeting on Monday, November 13, 2023, from 9:00 a.m. to 11:00 a.m. (CST).

The following materials will be discussed at the meeting:

Materials will be posted one week prior to the meeting.

Please hold this date and time on your calendars if you plan to participate.  Feel free to forward to others if we missed someone.

Here is a link to the Microsoft Teams meeting. Questions will be taken in the chat window.

Please reply with your participation plans by November 6, 2023, to Ted Weber tweber2@atcllc.com if you have not done so already.

We look forward to your involvement in this process.