Total Projects 4 12 15 Total Miles 5.5 25.3 30.8 1-Year Cost $13.0M 1-Year APC Benefit $68.5M 1-Year B/C Ratio 5.27 10.: Future 2 Portfolio Statistics Map Label Project Description Area(s) Type Study Cost Estimate Mileage 1 Build a new double circuit 115 kV line from Magic City to a point on the Logan - Mallard 115 kV line that minimizes the distance between the new substation and the cut-in point. Bisect the Logan - Mallard 115 kV line to cut-in the new double circuit 115 kV line. WAPA/XEL E $3,075,000 1.8 2 Rebuild 1.0 mile 115 kV line from Lawrence - Sioux Falls Upgrade terminal equipment at Lawrence and/or Sioux Falls to increase the rating of the line between the substations to 398/398 (SN/SE) WAPA/XEL E $1,383,750 1.0 6 Add 2 ohm Series reactor to Northeast - Charlotte 161 kV line KCPL E $512,500 - 7 Build a new second 230 kV line from Knoll to Post Rock. MIDW E $3,389,019 - 11 Rebuild 9.2-mile 161 kV line from Bull Shoals to Midway Jordan and upgrade any necessary equipment to increase the summer emergency rating to 335 MVA. SPA/EES E $8,089,406 9.2 12 Rebuild 2.1-mile 161 kV line from Siloam Springs (AEP)-Siloam Springs City (GRDA) and upgrade terminal equipment at Siloam Springs (AEP) and/or Siloam Springs City (GRDA) to increase the rating of the line between the substations to at least 446/446 (SN/SE) AEP/GRDA E $5,185,885 2.1 13 Install one (1) 138 kV phase shifting transformer at Woodward EHV along with upgrading relay, protective, and metering equipment, and all associated and miscellaneous materials. OGE E $7,459,438 -
Bull Shoals-Midway (161) ftlo Buford-Norfork (161) Rebuild 9-mile 161 kV line from Bull Shoals to Midway Jordan F2 Brookline Xfmr 2 (345/161) ftl Brookline Xfmr 1 (345/161) Install a 345/161 kV transformer at Morgan F1 Further analyzed in Alternative Project Analysis North Platte-Stockville (115) ftlo Gentleman-Red Willow (345) - - No project was selected for this need in Future 3 Arcadia-Jones KAMO (138) ftlo Arcadia-Northwest Station (345) - - Need was not observed in ITP10 South Hays-Hays (115) ftlo Knoll Xfmr (230/115) Build new 1-mile 230 kV 2nd circuit line from Knoll to Post Rock F1, F2 Table 15.: ITP10 Projects Addressing Top 10 Flowgates When analyzing projects to determine their inclusion in the final recommended plan, their performance in mitigating a top 10 congested flowgate was held in high regard. The rationale for recommendation of projects mitigating a current top congested flowgate is included in Section 16. Alternative Project Analysis Methodology An Alternative Project Analysis (APA) was conducted by SPP staff in addition to the original scope of the portfolio development process. The APA included additional focus and evaluation of transmission projects in two target areas, the eastern seam of SPP and the Texas panhandle. This analysis was conducted to support SPP initiatives such as addressing the SPP seams, current operational issues, and zonal deficiencies identified through the Regional Cost Allocation Review (RCAR) process. The APA resulted in two alternative project recommendations that differed from the results of the consolidated portfolios. Eastern Seams There were two corridors along the eastern seam of SPP that were further analyzed as part of the APA: southeast Kansas to southwest Missouri, and northeast Oklahoma to northwest Arkansas. This area was selected for further analysis for multiple reasons: were six different constraints in this area that were identified as economic needs in at least one future of the 2017 ITP10, as detailed in Table 15.3. Three of these economic needs were among the top 10 most congested constraints in SPP in 2015, as indicated in the 2015 ASOM Report.
Morgan - Brookline 161 kV line to summer emergency rating of 208 MVA and winter emergency rating of 232 MVA. Upgrade any necessary terminal equipment at Martin, Pantex North, Pantex South, and Highland tap to increase the rating of the 115 kV lines to 175/175 MVA (SN/SE). SPS R $682,034 18 1/1/2017 16 Upgrade any necessary terminal equipment at Tupelo and/or Tupelo Tap to increase the rating of the 161kV line between the two substations to a summer and winter emergency rating of 169/201 MVA. Upgrade terminal equipment at Lula and/or Tupelo Tap to increase the rating of the line between the substations to 171/192 (SN/SE). OGE/WFEC E $102,500 - 18 1/1/2020 Build new 345 kV line from Potter to Tolk SPS E $147,790,334 103 72 1/1/2017 Table 16.: 2017 ITP10 Recommended Portfolio 2017 ITP10 Recommended Portfolio