Memorandum Supplementing section 4.6.4 of th e GHG Mitigation Measures TSD supporting the final CPP. Ownership and Co-Location
From: Matt Clouse, OAP

On e example of co

- located fossil fuel-fired EGU and renewable energy in stallation s is Sempra Energy’s neighboring natu ral gas and solar PV projects located at 701 Eldorado Valley Drive in B oulder City, Nevada. Acc ording to satellite imagery, the Desert Star Energy Center 480 megawatt natural gas plant is located alongside the C op p er Mountain Solar 1 and 2 plants of 58 megawatts an d 9 2 megawatts, respectively.

In late 2014, the Kentucky Public Service Commiss io n ap pr ov ed a request from Louisville Gas and Electric (LG&E) and Kentucky Utilities (KU) to construct what w ill be the state's largest

so lar photovoltaic facility at th e utilities' E.W. Br own Generating Station
, wh ich has 3 coal units ( 1 1 3

, 1 8 0 an d 4 64 megawatt nameplate capacity) and seve ral simple cycle natural gas units. The 1 0

- megawatt solar facility is exp ected to go online in 2016 and will pro v ide renewable electricity d irectly to the grid, rep r esented by the follo w ing December 22, 2014 press release from LG&E and KU.

The press release, which can be found here https://lgeku.com/newsroom/articles/2014/12/22/kpsc-approves- lge-and-kus-request- build-states-largestsolar-facility as of August 2015, is titled, “KPSC Appr oves LG&E and KU's Request to Build State's Largest Solar Facility.” Here is the content of the press release.

This project and its approval is the result of positive, productive agreements between the utilities, the Sierra Club and industria l partners for the benefit of Kentucky.

The Kentucky Public Service Commission ap proved LG&E and KU's request to construct what will be the state's largest so lar photovoltaic facility in Mercer County at the utilities' E.W. Brow n Generating Station.

“This is a good example of how LG&E a nd KU, the Sierra Club and our industrial partners worked together for a mutually be neficial solution for Kentucky," said LG&E and KU Chief Operating Of ficer Paul Thompson.

“While Kentucky is not blessed with an abundance of wind and solar energy, the approval gives us the opportunity to learn more about solar technology,” said Thompson. “By utilizing our existing prope rty and taking advantage of tax incentives, we can offer our customers another source of generati on, similar to our existing hydro plants.”

The 10-megawatt solar facility is expected to go online in 2016 and cost $36 million.

The solar array will consist of solar panels and associated transformers, switches and other equipment. The number of solar panels will be driven by the final design of the solar array selected from the competitive bidding process.KU will own 61 percent of the array and LG&E the remaining 39 percent — a split based upon the relative load of the two utilities during daylight hours.

LG&E and KU will continue maintaining a diverse generation portfolio and are continually evaluating potent ial energy supplies to determ ine which available sources would allow the company to sufficiently prov ide safe, reliable, least-cost energy using commercially available technologies.

For more information, the agreement is also in cluded in the KPSC press release that is attached.

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