Common use of ESTIMATED COSTS OF CONNECTING TRANSMISSION OWNER’S INTERCONNECTION FACILITIES Clause in Contracts

ESTIMATED COSTS OF CONNECTING TRANSMISSION OWNER’S INTERCONNECTION FACILITIES. Description Estimated Costs Connecting Transmission Owner’s $1,118,000 Interconnection Facilities SERVICE AGREEMENT NO. 2547 Connecting Transmission Owner’s Review $3,500 and Acceptance of Interconnection Customer’s Interconnection Facilities Total $1,121,500 Cost estimates are presented in 2019 dollars, are based on current system conditions and are subject to the following exclusions: • property and right-of-way acquisition; • property, income, and use taxes; • future operation and maintenance costs; • legal fees; • additional costs due to adverse field conditions such as rock, water, matting, road construction, weather, and Interconnection Customer electrical equipment obstructions; • site grading beyond normal clearing, rough grading and topsoil removal; • site work (i.e., landscaping, access roads, clearing, etc.); • costs associated with permitting and licensing including unique permit requirements that materially impact the design; • telecommunications; • ground grid analyses, and/or modifications; • preparation, inspection or construction necessary to meet storm water compliance requirements; • extended construction hours to minimize outage time or Connecting Transmission Owner’s public duty to serve; • the cost of any temporary construction service, or any required permits; • distribution station service; • review and acceptance of any Interconnection Customer designs, specifications, construction, etc. associated with Stand Alone System Upgrade Facilities; • additional requirements due to lack of available space in the remote stations to accommodate any System Upgrade Facilities; and

ESTIMATED COSTS OF CONNECTING TRANSMISSION OWNER’S INTERCONNECTION FACILITIES. Description Estimated Costs Connecting Transmission Owner’s $1,118,000 Interconnection Facilities SERVICE AGREEMENT NO. 2547 Connecting Transmission Owner’s Review $3,500 and Acceptance of Interconnection Customer’s Interconnection Facilities Total $1,121,500 Cost estimates are presented in 2019 dollars, are based on current system conditions and are subject to the following exclusions: • property and right-of-way acquisition; • property, income, and use taxes; • future operation and maintenance costs; • legal fees; • additional costs due to adverse field conditions such as rock, water, matting, road construction, weather, and Interconnection Customer electrical equipment obstructions; • site grading beyond normal clearing, rough grading and topsoil removal; • site work (i.e., landscaping, access roads, clearing, etc.); • costs associated with permitting and licensing including unique permit requirements that materially impact the design; • telecommunications; • ground grid analyses, and/or modifications; • preparation, inspection or construction necessary to meet storm water compliance requirements; • extended construction hours to minimize outage time or Connecting Transmission Owner’s public duty to serve; • the cost of any temporary construction service, or any required permits; • distribution station service; • review and acceptance of any Interconnection Customer designs, specifications, construction, etc. associated with Stand Alone System Upgrade Facilities; • additional requirements due to lack of available space in the remote stations to accommodate any System Upgrade Facilities; andand 2- 3 SERVICE AGREEMENT NO. 2547 • any increase in material costs due to changes in commodity costs will be in addition to the estimate (i.e., present day commodity costs were used for the estimate).

ESTIMATED COSTS OF CONNECTING TRANSMISSION OWNER’S INTERCONNECTION FACILITIES. Description Estimated Costs Connecting Transmission Owner’s $1,118,000 Interconnection Facilities SERVICE AGREEMENT NO. 2547 $1,325,000 Connecting Transmission Owner’s Review $3,500 and Acceptance of Interconnection $7,000 Customer’s Interconnection Facilities Total $1,121,500 1,332,000 Cost estimates are presented in 2019 dollars, are based on current system conditions and are subject to the following exclusions: • property and right-of-way acquisition; • property, income, and use taxes; • future operation and maintenance costs; • legal fees; SERVICE AGREEMENT NO. 2548 • additional costs due to adverse field conditions such as rock, water, matting, road construction, weather, and Interconnection Customer electrical equipment obstructions; • site grading beyond normal clearing, rough grading and topsoil removal; • site work (i.e., landscaping, access roads, clearing, etc.); • costs associated with permitting and licensing including unique permit requirements that materially impact the design; • telecommunications; • ground grid analyses, and/or modifications; • preparation, inspection or construction necessary to meet storm water compliance requirements; • extended construction hours to minimize outage time or Connecting Transmission Owner’s public duty to serve; • the cost of any temporary construction service, or any required permits; • distribution station service; • review and acceptance of any Interconnection Customer designs, specifications, construction, etc. associated with Stand Alone System Upgrade Facilities; • additional requirements due to lack of available space in the remote stations to accommodate any System Upgrade Facilities; andand • any increase in material costs due to changes in commodity costs will be in addition to the estimate (i.e., present day commodity costs were used for the estimate).