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Cost Estimation for Regional Transmission Overlay Study (RTOS) Purpose & Key Takeaways Purpose: To provide detail for MISO’s cost estimation approach Key Takeaways: • Planning-Level and Scoping-Level MISO cost estimate approach • Generic Cost Estimation Data Cost Estimates: Overview Planning-Level cost estimates will be used to compare long-term indicative overlay roadmaps Why does MISO develop cost estimates 3 Prior to FERC Order 1000, Transmission Owners or stakeholders provided cost estimates for regional projects FERC Order 1000 introduced competition to who constructs, owns, and operates regionally cost shared projects Project cost is one area that Transmission Owners and Developers compete Stakeholders sought MISO’s involvement to develop cost estimates MISO Staff Expertise Cost Estimates: Planning-Level and Scoping-Level MISO estimates project cost in two stages – Planning and Scoping A Planning-Level cost estimate is a high level cost estimate for facilities in studies based on overall facility characteristics A Scoping-Level cost estimate is a preliminary cost estimate based on information derived from further research on particular project requirements in terms of assumed transmission line routing and construction details of line and substation 4 RTOS Study Cost Estimates: Regional Needs Identification Long term Indicative Overlay Roadmaps Development MISO Planning-Level cost estimate Preliminary Regional Plan Identification Candidate Regional Plan Evaluation 5 MISO Scoping-Level cost estimate Planning-Level Cost Estimate: Transmission Line Length; Voltage; Conductor; Structure, New or Re-Conductor Terrain Type Right-of-Way Cost Construction Cost Estimate AFUDC; Overhead; Contingency Project Implementation Cost Estimate 6 Planning-Level Cost Estimate: Transmission Line Inputs Transmission Estimate Inputs Definition Source: Straight Line Length + 20% Straight line between two interconnecting substations +20% Geography Voltage and Circuits Determined by the Voltage level and the number of circuits on the proposed line Planning Solution Idea Conductor Type ACSR, ACSS, or HTLS Planning Solution Idea Structure Type Lattice, or Tubular structure - determined to match existing structure types in the project area. Planning Solution Idea New or Re-Conductor Whether the proposed line is new, or re-conductoring an existing line. Planning Solution Idea Terrain Type Farmland, Desert, Wetland, Suburban, Rolling Hill, Urban, Mountain, Forested. Geography Right-of-Way Width Value is determined by the Voltage level and the number of circuits on the proposed line. Estimate Input Data AFUDC Allowance for Funds Used During Construction Estimate Input Data Overhead Services needed to complete the project, such as: Construction Management; Project Management; Permits; Legal Fees; and any other indirect costs. Estimate Input Data Contingency Additional funds included in estimate to account for unknown conditions at the time of completing the estimate Estimate Input Data 7 Planning-Level Cost Estimate: Substation # of New Positions; Arrangement; Voltage; New/Existing site Major Equipment (Transformer, Shunt Reactor, Series Capacitor) Construction Cost Estimate AFUDC; Overhead; Contingency Project Implementation Cost Estimate 8 Planning-Level Cost Estimate: Substation Inputs Substation Estimate Inputs Definition Source: # of New Positions Number of new line and/or major equipment positions added with the proposed project Planning Solution Idea Arrangement Ring Bus or Breaker-and-a-Half Bus Arrangement. Planning Solution Idea New Substation Adder If Substation is new, general facilities are needed such as land Planning Solution Idea cost, grading, fencing, grounding, and a control enclosure. Shunt Reactor MVA If a shunt reactor is required, the MVA will be specified. Planning Solution Idea Series Capacitor MVA If a series capacitor is required, the MVA will be specified. Planning Solution Idea Transformer MVA If a transformer is required, the MVA at the voltages of the transformer will be specified. Planning Solution Idea AFUDC Allowance for Funds Used During Construction Estimate Input Data Overhead Services needed to complete the project, such as: Construction Management; Project Management; Permits; Legal Fees; and any other indirect costs. Estimate Input Data Contingency Additional funds included in estimate to account for unknown conditions at the time of completing the estimate Estimate Input Data 9 Planning-Level Base Cost Transmission Line 230kV Single 345kV Single 345kV Double 500kV Single 765kV Single Circuit Circuit Circuit Circuit Circuit $1.2M $2.0M $3.3M $2.1M $2.45M Base cost ($/mile) in 2017$, M=Million Assumptions for Base cost as mentioned below Conductor Type Structure Type Length Terrain ACSS ACSS ACSS ACSR ACSR Tubular Steel Tubular Steel Tubular Steel Lattice Steel Lattice Steel Greater than 10 Greater than 10 Greater than 10 Greater than 10 Greater than 10 Miles Miles Miles Miles Miles Flat Farmland Flat Farmland Flat Farmland Flat Farmland Flat Farmland Base Costs do not include AFUDC, Overhead, or Contingency 10 Planning-Level Base Cost Substation 230 kV 345 kV 500 kV 765kV Substation Substation Substation Substation* $1.6M $2.4M $3.3M $11.4M $2.4M $3.7M $4.9M $13.8M $8.4M $12.1M $15.8M $50.1M $11.7M $17.0M $22.4M $59.9M New line position Existing Substation Ring Bus New line position Existing Substation Breaker-and-a-Half Bus New Substation 4 positions Ring Bus New Substation 4 positions Breaker-and-a-Half Bus *765kV Line Positions include one 300MVAr Reactor per line position 2017 Dollars, M = Million Base Costs do not include AFUDC, Overhead, or Contingency 11 Planning-Level Base Cost Substation Transformers Transformer 300 MVA 500 MVA 700 MVA 115kV/345kV $3.3M $5.6M $7.8M 138kV/345kV $3.3M $5.6M $7.8M 161kV/345kV $3.3M $5.6M $7.8M 750 MVA 1200 MVA 230kV/500kV $9.2M $14.7M 345kV/500kV $10.9M $17.4M 345kV/765kV $40.7M 500kV/765kV $40.7M 2017 Dollars, M = Million 12 2250 MVA Feedback MISO presented Cost Estimation Data in the February Planning Subcommittee meeting, and the February Economic Planning Users Group meeting and requested feedback Feedback was received on March 9, 2017 MISO will provide responses to the feedback received at upcoming Planning Subcommittee, and Economic Planning Users Group meetings 13 Contact Information Devang Joshi, PE Principal Transmission Design Engineer – MISO [email protected] Alex Monn, PE 14 Senior Substation Design Engineer – MISO [email protected] END 15 APPENDIX 16 Scoping-Level Estimate: Transmission Line Planning-Level Estimate Scoping-Level Estimate Straight Line Length g +20% Google Earth Line Routing g Voltage & # of Circuits Voltage & # of Circuits Conductor yp Type Conductor yp Type Conductor Size Fittings & Accessories Shield Wire 17 Scoping-Level Estimate: Transmission Line Planning-Level Estimate Scoping-Level Estimate Structure Type yp Structure Type yp # of Structures Foundation Details 18 New or Re-conductor New or Re-conductor Right-of-Way Right-of-Way Terrain Type Terrain Type Scoping-Level Estimate: Transmission Line Planning-Level Estimate Scoping-Level Estimate AFUDC AFUDC Overhead Construction Management g Project g Management Permits & g Fees Legal Indirect Costs Contingency 19 Contingency Scoping-Level Estimate: Substation Planning-Level Estimate Scoping-Level Estimate # of New Positions Mobilization & Demobilization All Equipment, g Bus & Fittings Steel Stands Foundations Conduit & Control Cable Relay Panels 20 Scoping-Level Estimate: Substation Planning-Level Estimate Scoping-Level Estimate Arrangement Arrangement New Substation Adder Land Cost Clearing & Grubbingg Grading, Fence & Groundingg Control Enclosure 21 Scoping-Level Estimate: Substation Planning-Level Estimate Scoping-Level Estimate Shunt Reactor MVA Shunt Reactor MVA Series Capacitor p MVA Series Capacitor p MVA Transformer MVA Transformer MVA 22 Scoping-Level Estimate: Substation Planning-Level Estimate Scoping-Level Estimate AFUDC AFUDC Overhead Construction Management g Project g Management Permits & g Fees Legal Indirect Costs Contingency 23 Contingency