ROCK ISLAND CLEAN LINEClean Energy. Delivered.

2

U.S. Onshore Wind Resources

United States - Annual Average Onshore Wind Speed at 80 m

3

Existing Transmission Lines

4

Clean Line Energy Partners

Clean Line projects

Connecting the lowest-cost wind resources to major

demand centers

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Rock Island Clean Line

DE NC IN PA MD VA NJ IL OH KY TN MI

WV DC

IANE

SD

Delivers 3,500 MW of wind power

500-mile direct current transmission line

Approximate project cost: $2 billion

1.4 million homes powered per year

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Rock Island Regulatory Approvals

REGULATORY APPROVALS

STATUS MILESTONES

Illinois Commerce Commission unanimously approved the Rock Island Clean Line on November 25, 2014, making Rock Island a public utility.

Iowa Utilities Board informational meetings completed in 16 counties, franchise petitions filed in November 2014.

Federal Energy Regulatory Commission authorized Rock Island to negotiate rates in 2012

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Key Partnerships

Kiewit will provide development support and construction

management services for the Rock Island Clean Line

Sabre Tubular Structures is the preferred supplier of transmission

structures for the Rock Island Clean Line

Siemens will provide the high voltage direct current technology solutions for

the Rock Island Clean Line

Southwire is the preferred supplier for the overhead transmission cable for the Rock Island Clean

Line

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2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 20250

20

40

60

80

100

120

140

160

180Projected demand1

Current supply (in PJM states, 2013 YE installed capacity)

Current supply + Rock Island

Growing Demand and Value for Renewables

RPS Demand in PJM States TWh

MD/NJ/PA Average REC Prices 2011-2014 $

1. Projected demand for renewable energy credits within PJM. States with voluntary goals are not included in the demand calculations. Source: EIA; DSIRE; AWEA

2. Prices as of 10/20/2014. 2013, 2014, 2015, and 2016 Vintage, Class 1/Tier 1 Maryland, New Jersey, and Pennsylvania. Source: SNL

Rock Island will supply 15 million MWh of clean energy per year to reduce projected REC shortfalls, helping states comply with Renewable Portfolio Standards. EPA 111(d) rules strengthen need for renewables and minimize likelihood of RPS repeal or rollback.

Jan-

11

Apr-1

1

Jul-1

1

Oct-1

1

Jan-

12

Apr-1

2

Jul-1

2

Oct-1

2

Jan-

13

May

-13

Aug-1

3

Nov-1

3

Feb-

14

May

-14

Aug-1

4 -

2

4

6

8

10

12

14

16

18

20

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Clean Line Competes

0

20

40

60

80

100

120

140

160

180

23

74

94104 105

120

144.5154

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Levelized Cost of Energy$ / MWh

1. Based on the Lazard estimate for high-capacity factor wind, includes Production Tax Credit2. Assumes ~725 miles of transmission at $2 mm per mile, end-point converter costs of $250 mm each, mid-

point converter at $100 mm and development cost of ~$100 mm, price is flat for 25 years3. Cost of generation based on mid-point of Lazard’s Levelized Cost of Energy estimate4. Assumes $4.50/MMBtu gas price. Source: Clean Line, Lazard’s 2013 Levelized Cost of Energy Analysis

3, 4

Transmission2

Wind1

3

3 3 3

3 3

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Direct Current Technology

• More efficient — Lower line losses

• Lower cost — Requires less infrastructure, results in lower costs and lower prices for delivered renewable energy

• Improved reliability — Control of power flow enhances system stability and lowers cost of integrating wind

• Smaller footprint — Uses a narrower right-of-way than equivalent Alternating Current (AC)

AC footprint DC footprint

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Delivering Renewable Energy

• In O’Brien County, Iowa• Collects wind energy• Converts energy from AC

to DC• Transmits energy on the

Rock Island Clean Line

• In Grundy County, Illinois• Receives energy from the Rock

Island Clean Line• Converts energy from DC to AC• Connects with existing

transmission system

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0.37 0.09 0.03

0.37 0.19 0.07

0.09 0.19 0.75

0.03 0.07 0.75

KS IA IL IN

KS

IA

IL

IN

Correlation of 10-Minute Wind Energy Generated

Low correlationMedium correlationHigh correlation

Source: EWITS; Clean Line analysis

Wind Power Curve Correlations

.00 .02 .15 .19PA

1. “Low correlation”: between 0.0 and 0.25; “Medium correlation”: between 0.25 and 0.5; “High correlation”: between 0.5 and 1.0

.00

.02

.15

.19

PA

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Economic Benefits

$7 bil l ion in new wind farm investments

$2 bil l ion investment in transmission l ine project

Millions per year in tax payments

Provides electricity to 1.4 million homes per year

5,000+ construction jobs

500+ operations jobs

Significant pollution reduction

Increased market competition benefits consumers

"Expanding transmission is ver y impor tant to the U.S. wind industr y and to Iowa. The Rock Island Clean Line enables a market for 4,000 MW of new wind, suppor ting hundreds of jobs at facilities like our wind blade factor y in Newton, Iowa."

— Steve Lockard,President & CEO, TPI Composites

Inc

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Preferred Route

www.rockislandcleanline.com

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Typical Structure TypesLattice Mast StructureMonopole Structure Lattice Structure

Typically 4 - 6 structures per mile

Typically 1,000 - 1,300-foot spans between

structures

Typically 4 - 6 structures per mile

Typically 1,000 - 1,300-foot spans between

structures

Typically 3 - 5 structures per mile

Typically 1,100 - 1,600-foot spans between

structures

Structure sizes and span lengths vary due to soil conditions, topography and other routing considerations.

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Study Corridors

3 to 10-mile-wide study corridors within which Clean Line has worked with communities and other stakeholders to determine the preferred route for the line

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Environmental Benefits

9 MILLION TONS(equal to taking 1.7 million cars off the road each year)

16,100 TONS PER YEAR(sulfur dioxide is a precursor to acid rain)

8,300 TONS PER YEAR(nitrogen oxide contributes to smog)

140 POUNDS OF MERCURY PER YEAR

OVER 3.5 BILLION GALLONS OF WATER PER YEAR

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Growing Demand For Renewables

0

20

40

60

80

100

120

140

160

180

Rock Island

Current renewables supply

Renewable energy demand

Renewable energy supply and demand in PJM statesThousand GWh

1. Energy from existing wind, biomass, and solar projects within the PJM states 2. Demand for renewable energy credits within PJM. States with voluntary goals are not

included in the demand calculations.

Sources: EIA; DSIRE; AWEA; PJM Transmission Expansion Advisory Committee

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Local Business OpportunitiesEngineering • Geotechnical engineering• Utility potholing • Surveying (Lidar, staking)

Equipment Rentals • Vehicles, excavators, dozers, cranes• Equipment Fueling Trucking and Hauling Service

Environmental • Silt fence • Dewatering • Environmental controls ST&S

Local Services • Title searches and abstracting• Housing / apartments / hotels • Restaurants • Office and event space

Converter/substation equipment• Transformers• Converter stations

Access • Clearing of right away • Stone purchasing • Geo fabric material • Culvert material and installation

Foundations • Drilled pier contractors • Concrete suppliers• Rebar suppliers and installers • Foundation casings

Structures • Steel fabricators• Lattice and monopole structure manufacturers• Rigging materials

Conductor• Conductor manufacturers, aluminum producers• Conductor hardware and insulators

Restoration • Site grading • Hydro or broadcast seeding • Grass matting