Solar Energy Services

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2 Utility-Scale Solar Project Development & Construction - EPC Perspective

3 Our Financial Strength is Behind Every Project Regulated Utilities Alliant Energy Resources, Inc. Corporate Services Interstate Power & Light Company Alliant Energy Transportation Wisconsin Power & Light Company Part of a $8 billion energy holding company 900+ employees in offices across the U.S. and UK Founded over 30 years ago to provide energy and environmental solutions 3

4 Solar Project development and Construction Development Engineering, Procurement & Construction Siting Assessments Electrical & Civil Engineering Energy & Interconnect Studies Bidding & Procurement Acquiring Land Rights Electrical & Civil Construction Power Purchase Agreements Startup & Commissioning Permitting 4

5 Solar Energy from Site to Grid Site Development Due diligence assessment Transmission and interconnection support Solar resource evaluations Land use approvals Land control support Environmental permitting and assessments Construction Health & safety Electrical infrastructure Civil infrastructure Assembly and installation Procurement & project management Start-up & commissioning CQA Engineering Electrical design Civil design Foundation design Transmission Interconnection Full route planning Transmissio n design Geotechnica l Investigation s Transmissio n construction 5

6 Site Development Site Selection Due diligence and fatal flaw analysis Energy assessments Landowner coordination Technology selection support Preliminary Development & Design Interconnect application/ppa planning Load-flow and transmission feasibility evaluations Preliminary site design Environmental assessments & permitting Final Development & Design Interconnect agreement Final site design Landowner coordination Construction contracts 6

7 Civil Engineering Establishment of design standards and customer requirements Geotechnical investigations Road design Foundation design Identification and tracking of licenses, permitting, and environmental compliance requirements 30% and 90% design reviews Constructability reviews Long lead procurement planning Real-time analysis of field-directed design changes 7

8 Electrical Engineering Collector systems Substations Transmission lines Electrical system studies and interconnection analysis 30% and 90% design reviews (typical) Coordination of designs for above and below-grade features, protection systems, and controls Constructability reviews Long lead procurement planning Real-time analysis of field-directed design changes 8

9 Construction Surveying, site work, roads, restoration Earthwork and road construction Foundations, piers, concrete Electrical collector systems Equipment assembly & installation Energization Logistics Management Substation and T-Line Construction Management Union/Open Shop Coordination 9

10 Construction Processes Safety and Environmental Compliance Lean Construction Techniques Project Planning and Controls Quality Control/Quality Assurance Procurement Construction Methods Project Close-Out and Documentation 10

11 Procurement Dedicated solely to renewable energy projects Early procurement of long-lead items, specified by in-house engineering Pre-approve all potential suppliers of services and materials Broad network of supplier relationships, including Alliant Energy s network Complete capability to manage international and domestic logistics 11

12 Quality Design and Construction Ensures a Reliable Energy Source Quality Planning Developing project specific quality plan to fulfill the defined quality objectives. Quality Control Actions taken by the RMT to provide material and workmanship that meet the requirements of the contract, plans and specifications. Quality Assurance Providing confidence that quality requirements will be fulfilled, routine project audits. Quality Improvement Striving to continuously improve our systems. 12

13 Critical Issues for Successful Project Execution Early Development of Schedule, Execution Plan and Project Controls Early Engineering and Procurement with Client Involvement Key Equipment Reserved Early Identify Water Resource Needs Environmental Issues Construction Labor Utility Service 13

14 s Key Engineering and Construction Activities Site Civil Work Foundations Solar Step-up Equipment Transformers Collector System Substation Components Power Transmission Transformer Line ngineering Materials and Equipment RMT Purchase RMT Purchase N/A Owner Supplied N/A RMT Purchase or Owner Supplied RMT Purchase and GE Alliance RMT Purchase or Owner Supplied RMT Purchase onstruction Installation and Owner Subcontract Subcontract Subcontract 14

15 Solar Energy Experience ~1,000 MWs of solar energy engineering and construction projects in our pipeline Imperial Valley Solar Two (Tessera Solar, Imperial County, CA) Engineering and construction of civil, electrical and mechanical infrastructure for 300 MW facility Phase 1 of 750 MW facility 34.5 kv substation 4.5 kv V collector system 10 miles of 230 kv transmission line 12,000 pedestals for SunCatcher units 12 miles of reclaimed wastewater pipeline Water treatment and storage Hydrogen generation and distribution Administration building & security system Concrete-lined evaporation ponds Currently providing environmental and permitting services for multiple solar thermal and photovoltaic projects (licensing through the California Energy Commission) Photo courtesy of Stirling En ergy System s 15

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