BEFORE THE PUBLIC SERVICE COMMISSION OF MARYLAND

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1 BEFORE THE PUBLIC SERVICE COMMISSION OF MARYLAND IN THE MATTER OF THE APPLICATION OF * MASON DIXON SOLAR CENTER, LLC FOR A CERTIFICATE OF PUBLIC * Case No.: 9426 CONVENIENCE AND NECESSITY TO CONSTRUCT A 18.4 MW SOLAR * PHOTOVOLTAIC GENERATING FACILITY IN WASHINGTON COUNTY, MARYLAND * * * * * * * * * * * * * * * SUPPLEMENTAL DIRECT TESTIMONY OF RYAN GILCHRIST ON BEHALF OF MASON DIXON SOLAR CENTER, LLC November 10, / /09/2016

2 1 2 3 Q. PLEASE STATE YOUR NAME, BUSINESS ADDRESS AND TITLE. A. My name is Ryan Gilchrist, Project Developer, Coronal Development Services, LLC, 321 East Main Street, Charlottesville, Virginia Q. ARE YOU THE SAME RYAN GILCHRIST THAT SUBMITTED DIRECT TESTIMONY TO THE COMMISSION ON OCTOBER 20, 2016 IN THIS PROCEEDING? A. Yes, I am. Q. WHAT IS THE PURPOSE OF YOUR SUPPLEMENTAL DIRECT TESTIMONY? A. The purpose of my supplemental direct testimony is to provide additional information for the record in this proceeding that further clarifies that the Mason Dixon Solar Project (the Project ) does not present a glare hazard to the Hagerstown Regional Airport Q. WHERE IS THE PROJECT LOCATED RELATIVE TO THE HAGERSTOWN REGIONAL AIRPORT? A. The Hagerstown Regional Airport is located approximately 3,200 feet southeast of the Project Site Q. DOES THE ERD SUBMITTED WITH MASON DIXON S APPLICATION FOR A CPCN IN THIS PROCEEDING INCLUDE INFORMATION ON GLARE? A. Yes, it does. Page 26 of the ERD states that Mason Dixon has corresponded with the Federal Aviation Administration ( FAA ) via submission of a FAA Form The glare analysis provided to the FAA is included as Attachment A to my supplemental / /09/2016

3 direct testimony. 1 After performing analysis related to the Project s proposed height, location, and glare, the FAA issued Determination of No Hazard to Air Navigation letters to Mason Dixon corresponding to the boundary points of the Project. These letters are included as Appendix E to the ERD Q. DID MASON DIXON PERFORM ANY ADDITIONAL OUTREACH TO FURTHER CONFIRM THE PROJECT WILL HAVE NO GLARE IMPACT ON THE HAGERSTOWN REGIONAL AIRPORT? Yes, it did. Mason Dixon sought a determination from the Maryland Department of Transportation Aviation Administration ( MAA ) that the Project will not present a glare hazard to the Hagerstown Regional Airport. After its review, MAA determined the Project presents no solar glare hazards for any of [the] runway approaches at Hagerstown Regional Airport and thus would not be an obstruction or hazard to air navigation. The correspondence from MAA confirming this conclusion in included as Attachment B to my supplemental direct testimony Additionally, Mason Dixon provided glare studies to and sought input from the Hagerstown Regional Airport, which also received a copy of MAA s determination. As indicated in the correspondence included as Attachment C to my supplemental direct testimony, based on this information the Hagerstown Regional Airport does not object to the Project for any reason, including on the basis of glare impacts Q. DO THESE CORRESPONDENCES INDICATE THAT THE PROJECT DOES NOT PRESENT A GLARE HAZARD TO THE HAGERSTOWN REGIONAL AIRPORT? 1 All glare analysis for the project utilized the Project s proposed single-axis tracking configuration / /09/2016

4 1 2 Yes. These correspondences indicate that the Project does not present a glare hazard to the Hagerstown Regional Airport. 3 4 Q. DOES THIS CONCLUDE YOUR SUPPLEMENTAL DIRECT TESTIMONY? A. Yes, it does / /09/2016

5 / /09/2016 RG-3 Attachment A

6 Solar Glare Hazard Analysis Flight Path Report Generated Dec. 14, 2015, 11:19 a.m. Flight path: Runway 2 No glare found! Print 1 of 5 12/14/15, 1:19 PM

7 Analysis & PV array parameters Analysis name Mason Dixon 2 PV array axis tracking single Tilt of tracking axis (deg) 0.0 Orientation of tracking axis (deg) 0.0 Offset angle of module (deg) 0.0 Limit rotation angle? True Maximum tracking angle (deg) 52.0 Rated power (kw) Vary reflectivity PV surface material True Smooth glass without ARC Timezone offset -5.0 Subtended angle of sun (mrad) 9.3 Peak DNI (W/m^2) Ocular transmission coefficient 0.5 Pupil diameter (m) Eye focal length (m) Time interval (min) 1 Correlate slope error with material False Slope error (mrad) 10.0 Flight path parameters Direction (deg) of 5 12/14/15, 1:19 PM

8 Glide slope (deg) 3.0 Consider pilot visibility from cockpit False 3 of 5 12/14/15, 1:19 PM

9 PV array vertices id Latitude (deg) Longitude (deg) Ground Elevation Height of panels above ground Total elevation Flight Path Observation Points Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? Threshold No 1/4 mi No 1/2 mi No 3/4 mi No 1 mi No 1 1/4 mi No 1 1/2 mi No 1 3/4 mi No 4 of 5 12/14/15, 1:19 PM

10 Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? 2 mi No No glare found Sandia Corporation 5 of 5 12/14/15, 1:19 PM

11 Solar Glare Hazard Analysis Flight Path Report Generated Dec. 14, 2015, 11:01 a.m. Flight path: Runway 9 Approach from SW No glare found! Print 1 of 5 12/14/15, 1:03 PM

12 Analysis & PV array parameters Analysis name PV array axis tracking Mason Dixon single Tilt of tracking axis (deg) 0.0 Orientation of tracking axis (deg) 0.0 Offset angle of module (deg) 0.0 Limit rotation angle? True Maximum tracking angle (deg) 52.0 Rated power (kw) Vary reflectivity PV surface material True Smooth glass without ARC Timezone offset -5.0 Subtended angle of sun (mrad) 9.3 Peak DNI (W/m^2) Ocular transmission coefficient 0.5 Pupil diameter (m) Eye focal length (m) Time interval (min) 1 Correlate slope error with material False Slope error (mrad) 10.0 Flight path parameters Direction (deg) of 5 12/14/15, 1:03 PM

13 Glide slope (deg) 3.0 Consider pilot visibility from cockpit True Max downward viewing angle (deg) 30.0 Azimuthal viewing angle (deg) of 5 12/14/15, 1:03 PM

14 PV array vertices id Latitude (deg) Longitude (deg) Ground Elevation Height of panels above ground Total elevation Flight Path Observation Points Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? Threshold No 1/4 mi No 1/2 mi No 3/4 mi No 1 mi No 1 1/4 mi No 1 1/2 mi No 1 3/4 mi No 4 of 5 12/14/15, 1:03 PM

15 Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? 2 mi No No glare found Sandia Corporation 5 of 5 12/14/15, 1:03 PM

16 Solar Glare Hazard Analysis Flight Path Report Generated Dec. 14, 2015, 11:19 a.m. Flight path: Runway 20 No glare found! Print 1 of 5 12/14/15, 1:19 PM

17 Analysis & PV array parameters Analysis name Mason Dixon 2 PV array axis tracking single Tilt of tracking axis (deg) 0.0 Orientation of tracking axis (deg) 0.0 Offset angle of module (deg) 0.0 Limit rotation angle? True Maximum tracking angle (deg) 52.0 Rated power (kw) Vary reflectivity PV surface material True Smooth glass without ARC Timezone offset -5.0 Subtended angle of sun (mrad) 9.3 Peak DNI (W/m^2) Ocular transmission coefficient 0.5 Pupil diameter (m) Eye focal length (m) Time interval (min) 1 Correlate slope error with material False Slope error (mrad) 10.0 Flight path parameters Direction (deg) of 5 12/14/15, 1:19 PM

18 Glide slope (deg) 3.0 Consider pilot visibility from cockpit True Max downward viewing angle (deg) 30.0 Azimuthal viewing angle (deg) of 5 12/14/15, 1:19 PM

19 PV array vertices id Latitude (deg) Longitude (deg) Ground Elevation Height of panels above ground Total elevation Flight Path Observation Points Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? Threshold No 1/4 mi No 1/2 mi No 3/4 mi No 1 mi No 1 1/4 mi No 1 1/2 mi No 1 3/4 mi No 4 of 5 12/14/15, 1:19 PM

20 Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? 2 mi No No glare found Sandia Corporation 5 of 5 12/14/15, 1:19 PM

21 Solar Glare Hazard Analysis Flight Path Report Generated Dec. 14, 2015, 11:03 a.m. Flight path: Runway 27 Approach from NE No glare found! Print 1 of 5 12/14/15, 1:03 PM

22 Analysis & PV array parameters Analysis name PV array axis tracking Mason Dixon single Tilt of tracking axis (deg) 0.0 Orientation of tracking axis (deg) 0.0 Offset angle of module (deg) 0.0 Limit rotation angle? True Maximum tracking angle (deg) 52.0 Rated power (kw) Vary reflectivity PV surface material True Smooth glass without ARC Timezone offset -5.0 Subtended angle of sun (mrad) 9.3 Peak DNI (W/m^2) Ocular transmission coefficient 0.5 Pupil diameter (m) Eye focal length (m) Time interval (min) 1 Correlate slope error with material False Slope error (mrad) 10.0 Flight path parameters Direction (deg) of 5 12/14/15, 1:03 PM

23 Glide slope (deg) 3.0 Consider pilot visibility from cockpit True Max downward viewing angle (deg) 30.0 Azimuthal viewing angle (deg) of 5 12/14/15, 1:03 PM

24 PV array vertices id Latitude (deg) Longitude (deg) Ground Elevation Height of panels above ground Total elevation Flight Path Observation Points Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? Threshold No 1/4 mi No 1/2 mi No 3/4 mi No 1 mi No 1 1/4 mi No 1 1/2 mi No 1 3/4 mi No 4 of 5 12/14/15, 1:03 PM

25 Latitude (deg) Longitude (deg) Ground Elevation Eye-level height above ground Glare? 2 mi No No glare found Sandia Corporation 5 of 5 12/14/15, 1:03 PM

26 / /09/2016 RG-3 Attachment B

28 / /09/2016 RG-3 Attachment C

From: Sent: To: Cc: Subject: Ridenour, Phil <PRidenou@washco-md.

29 From: Sent: To: Cc: Subject: Ridenour, Phil Wednesday, November 09, :50 AM 'Ben Combs' Kroboth, Kathy RE: Mason Dixon Solar Center - Hagerstown Regional Airport Correspondence Good morning Ben, Hagerstown Regional Airport has no objection to the Mason Dixon, LLC solar fam installation. Federal Aviation Administration as well as Maryland Aviation Administration find no objections so accordingly, we have none as well. Best of luck with your project and we appreciate your correspondence! Regards, Phil From: Ben Combs [mailto:bcombs@coronalgroup.com] Sent: Thursday, November 3, :11 PM To: Ridenour, Phil Subject: FW: Mason Dixon Solar Center - Hagerstown Regional Airport Correspondence Mr. Ridenour, Thank you for returning my call this afternoon. As discussed, please find attached the glare analyses for the Mason Dixon Solar Center, which is located about 0.5 miles West of the Hagerstown Regional Airport. We performed the analyses for each flight approach path corresponding to the two active runways at the facility. Included as well are the following supplements: Mason Dixon Solar Center Project Summary USGS map depicting location in relation to Hagerstown Regional Airport 4 x FAA Approvals stating ³No Hazard to Air Navigation² for each of the project boundary points If you have any additional questions, please feel free to reach out to me directly. 1

Best regards, Ben Ben Combs Senior Project Engineer Coronal Development Services P 434 446 1459 C 434 962 5122

30 Best regards, Ben Ben Combs Senior Project Engineer Coronal Development Services P C bcombs@coronalgroup.com Charlottesville Los Angeles New York Newark San Francisco Click here to learn more about Coronal Group and Panasonic 2

^_ Key Observation Point Viewshed Model. Grazing Yak Solar Project. Key Observation Point Location Map KOP #6 KOP #3 KOP #1 KOP #2 KOP #4 KOP #5

^_ Key Observation Point Viewshed Model. Grazing Yak Solar Project. Key Observation Point Location Map KOP #6 KOP #3 KOP #1 KOP #2 KOP #4 KOP #5 Liberty Rd Paint Mine Rd Mc Queen Rd Paint Mine Rd E q Funk Rd ^_ KOP #6 Currier Rd Washington Rd ^_ KOP #1 ^_ KOP #2 ^_ KOP #3 Hanisch Rd ^_ KOP #4 Judge Orr Rd ^_ KOP #5 0 1,000 2,000 Feet Solar Array