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I I Iisbased on information known as of the date of this filingand upon planning Project schedule s p p g assumptions that balance the timing of implementation with the availability of crews and materials I and with other practical considerations. This schedule may be subject to revision as further information is developed. I3.5 Project Cost Xcel Energy estimates that the Proposed new transmission line and new Orono Substation will cost I approximately $5.3 million, depending upon the selected route, and broken down as follows in Table 3. I Table 3 Estimated Project Cost I Project Item Cost New 115 kV Transmission Line Facilities along Proposed $1.2 million Route IOrono Substation Removal and Replacement $4.1 million Total Project Cost $5.3 million IXcel Energy will construct, operate and maintain the new Orono Substation and transmission lines proposed in this Project. I Operating and maintenance costs for the transmission line will be nominal for several years, since the line will be new and minimal vegetation maintenance will be required. Typical annual operating and maintenance costs for 115 kV transmission voltages across Xcel Energy's Upper Midwest I system area are on the order of$300 to $500 per mile of transmission right-of-way. The principal operating and maintenance cost include inspections, which are usually done by fixed-wing aircraft and by helicopter on a regular basis. IThe Company performs periodic inspections of substations and equipment. The type and frequency of inspection varies depending on the type of equipment. Typical inspection intervals are semi- I annual or annual. Maintenance and repairs are performed on an as-needed basis, and therefore the cost varies from substation to substation. I I I I I• Orono Project June 7,2011 MPUC Docket No. E002/TL-11-223 11