Chapter 2.1: Investment Summary
The 345 MTEP15 new Appendix A projects represent $2.75 billion in transmission infrastructure investment and fall into the following three categories:
- 90 Baseline Reliability Projects (BRP) totaling $1.2 billion — BRPs are required to meet North American Electric Reliability Corp. (NERC) reliability standards.
- 12 Generator Interconnection Projects (GIP) totaling $73.6 million — GIPs are required to reliably connect new generation to the transmission grid.
- 1 Market Efficiency Project (MEP) totaling $67.4 million – MEPs meet Attachment FF requirements for reduction in market congestion.
- 242 Other Projects totaling $1.38 billion — Other projects include a wide range of projects, such as those that support lower-voltage transmission systems or provide local economic benefit, but do not meet the threshold to qualify as Market Efficiency Projects.
The largest 10 projects represent 35 percent of the total cost and are distributed across the MISO region (Figure 2.1-1).
The new projects recommended for approval in MTEP15 Appendix A are broken down by region and project type (Table 2.1-1). New projects in MTEP15 Appendix A contain three cost-shared Generator Interconnection Projects. Cost sharing information is provided in Chapter 2.2.
|Region||Baseline Reliability Project (BaseRel)||Generator Interconnection Project (GIP)||Market Efficiency Project (MEP)||Other||Total|
Table 2.1-1: MTEP15 New Appendix A investment by project category and planning region
Other Project Type
Within the Other project type, there are a number of subtypes that give more insight into the purpose of these projects (Figure 2.1-2). The majority of Other projects address reliability issues — either due to aging transmission infrastructure or local, non-baseline reliability needs. The remaining projects mostly address distribution concerns, with a small percentage of projects targeting localized economic benefits or unspecified needs.
Each MTEP project is composed of one or more facilities. The facilities consist of elements such as substations, transformers and various types of transmission lines (Figure 2.1-3). About 60 percent of facility cost is categorized as transmission line — either new line on new right-of-way or line upgrades and rebuilds.
New Appendix A projects are spread over 14 states, with eight states scheduled for more than $100 million in new investment (Figure 2.1-4). A few projects have investment in more than one state, but the statistics in the figure are aggregated to the primary state. These geographic trends vary greatly year to year as existing capacity in other parts of the system is consumed and new build becomes necessary.
Active Appendix A Investment
The active project spending for Appendix A, with the addition of MTEP15 new projects, increases to 939 projects amounting to approximately $12.9 billion of investment (Figure 2.1-5). MTEP15 Appendix A contains newly approved projects and previously approved projects that are not yet in service. Projects may be comprised of multiple facilities. Large project investment is shown in a single year but often occurs over multiple years (Figure 2.1-6). Investment totals by year assume that 100 percent of a project’s investment is fulfilled when the facility goes into service.
MISO Transmission Owners have committed to significant investments in the transmission system (Table 2.1-2). Cumulative MTEP transmission investment for Appendix A is approximately $12.9 billion with another $2.8 billion in Appendix B. New MTEP15 Appendix A projects represents $2.7 billion of this investment. Projects associate primarily with a single planning region, though some projects may involve multiple planning regions. About $5 billion of the $13.0 billion in cumulative Appendix A is from the Multi-Value Projects (MVP) approved in MTEP11. Projects are spread across the four MISO geographic planning regions: East, Central, West and South (Figure 2.1-7).
Active Appendix A Line Miles Summary
MISO has approximately 66,500 miles of existing transmission lines. There are approximately 7,700 miles of new or upgraded transmission lines projected in the 10-year planning horizon in MTEP15 Appendix A (Figure 2.1-8, Table 2.1-3).
- 4,600 miles of upgraded transmission line on existing corridors are planned
- 3,100 miles of new transmission line on new corridors are planned
Table 2.1-3: New or upgraded line miles by voltage class (kV) in Appendix A through 2025