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Know what'sbelow. R Call before you dig. ELLSWORTH 1 ENERGY CENTER Phone (214) 473-4640 2901 Dallas Parkway, Suite 400 Tol Free (888) 937-5150 Plano, TX 75093 westwoodps.com Westwood Professional Services, Inc. Arizona Reg. Firm NO. F-1406398-2 ENERGY STORAGE SYSTEM 8759 E STARFIRE AVENUE MESA, ARIZONA SEC SUNBELT MESA RAY 202 TRACT A & A PORTION OF LOT 1, VIEW 202, AS RECORDED IN BOOK 1638 OF MAPS, PAGE 11 OF MARICOPA PREPARED FOR: COUNTY, ARIZONA, LOCATED WITHIN THE SOUTH HALF OF THE SECTION 21, TOWNSHIP 1 SOUTH RANGE 7 Ellsworth Energy EAST, OF THE GILA AND SALT RIVER MERIDIAN, MARICOPA COUNTY, ARIZONA Center, LLC 700 Universe Boulevard Juno Beach, FL 33408 Civil Site Plan REVISIONS: # DATE COMMENT BY CHK APR A 05/14/2026 ISSUED FOR PERMIT DM MS BM B 06/10/2026 ISSUED FOR PERMIT DM MS BM C 07/10/2026 ISSUED FOR PERMIT DM MS AK D 08/14/2026 ISSUED FOR PERMIT MP MS BM E 10/14/2026 ISSUED FOR PERMIT DM MS BM REGIONAL REGIONAL MAP MAP VICINITY VICINITY MAP MAP UTAH COLORADO NEVADA E ELLIOT Rd Sheet List Table 202 SHEET LAST REV LAST REV SHEET TITLE NUMBER DATE NUMB BYW-C-001 Cover Sheet 10/14/2026 E FLAGSTAFF EXISTING SUBSTATION BWY-C-100 Existing Conditions Plan 10/14/2026 E E WARNER Rd BYW-C-200 Overall Site Plan 10/14/2026 E 40 40 BYW-C-300 Grading and Drainage Plan 10/14/2026 E BYW-C-301 Grading Profile Plan N-S 10/14/2026 E BYW-C-302 Grading Profile Plan E-W 10/14/2026 E 17 EASTMARK CALIFORNIA NEW MEXICO SANTAN VILLAGE 10 PHOENIX SITE PLAN 1 AREA 10 8 TUCSON 10 E PECOS Rd SITE 19 85 (NOT TO SCALE) MEXICO (NOT TO SCALE) DATA SET INFORMATION APPLICABLE CODES & STANDARDS COORDINATE SYSTEM ARIZONA CENTRAL ZONE, Int. FT (HARN) NFPA 70, THE NATIONAL ELECTRIC CODE AS ADOPTED AND AMENDED BY THE AHJ (2023) BASE FILE FILE NAME PROVIDER DATE NFPA 70E, STANDARD FOR ELECTRICAL SAFETY IN THE WORKPLACE (2024) COLLIERS ENGINEERING AND ALTA SURVEY NORTH 25-1015_2298 NEXTERA LOT 6B ALTA.pdf 10/15/2025 DESIGN ANSI C2, THE NATIONAL ELECTRICAL SAFETY CODE (2023) HUNTER ENGINEERING CIVIL ALTA SURVEY SOUTH AZ - Ellsworth - ALTA Survey 12-17-2024 2.pdf 12/17/2024 AND SURVEY IEEE 1547 STANDARD FOR INTERCONNECTING DISTRIBUTED RESOURCES WITH ELECTRIC POWER SYSTEMS (2018) Ellsworth Ellsworth I GEOTECHNICAL REPORT NextEra - Ellsworth BESS DRAFT Geotechnical Report (21AUG2026) ANS 08/21/2026 WESTWOOD PROFESSIONAL ANSI C57.12.00 GENERAL REQUIREMENTS FOR LIQUID-IMMERSED DISTRIBUTION, POWER, AND REGULATING SITE DESIGN 0077606.00C-SITE.dwg SERVICES, INC. 08/28/2026 TRANSFORMERS (2010) Energy Energy Center Center HYDROLOGY REPORT - WESTWOOD PROFESSIONAL - IBC INTERNATIONAL BUILDING CODE, AS ADOPTED AND AMENDED BY THE AHJ (2021) SERVICES, INC. City City of of Mesa, Mesa, Arizona Arizona AQUATIC RESOURCES REPORT Ellsworth Aquatic Resources Memo_20251003.pdf ENVIRONMENTAL RESOURCES 10/03/2025 CITY OF MESA FIRE ORDINANCE NO. 5976 & SECTION 11-31-37 Ellsworth II Aquatic Resources Memo_20250925.pdf MANAGEMENT, INC. 09/25/2025 BIOLOGICAL RESOURCES REPORT Ellsworth Biological Resources Report_20251003.pdf ENVIRONMENTAL RESOURCES 10/03/2025 ENVIRONMENTAL CONDITIONS Ellsworth II Biological Resources Report_20250925.pdf MANAGEMENT, INC. 06/25/2025 ITEM VALUE MAX. AMBIENT AIR TEMPERATURE 119.3°F/ 48.5°C CULTURAL CLASS REPORT Nextera_ERM_CulturalClassI_Ellsworth I_20250924.pdf ENVIRONMENTAL RESOURCES 09/24/2025 Cover Sheet Nextera_ERM_CulturalClassI_Ellsworth II_20250909.pdf MANAGEMENT, INC. 09/09/2025 NOMINAL AMBIENT AIR TEMPERATURE 75.92°F/ 24.4°C MIN. AMBIENT AIR TEMPERATURE 27.5°F/-2.5°C Mak PHASE 1 REPORT Final Ellsworth Energy Storage Project II_Phase I ESA_11112025.pdf ENVIRONMENTAL RESOURCES 11/11/2025 Final NextEra Ellsworth Phase I ESA_20251003.pdf MANAGEMENT, INC. 10/03/2025 RISK CATEGORY: II Dallas SEISMIC CONDITION SOIL CLASS: D PM SEISMIC CATEGORY: D 5:57 CONTACT INFORMATION WIND LOADS 102 MPH 10/14/2026 PROJECT ROLE CONTACT NAME COMPANY PHONE SNOW LOADS 4 PSF ICE LOADS 0 PSF OWNER/DEVELOPER - ELLSWORTH ENERGY CENTER, LLC - ELEVATION ABOVE SEA LEVEL 1391.1 FT / 424m CONTRACTOR TBD TBD TBD ISSUED FOR PERMIT PROJECT MANAGER YASAMINE TAHERIROZBAHANI WESTWOOD PROFESSIONAL SERVICES, INC. 785-393-7266 CIVIL PROJECT ENGINEER MINDA SANCHEZ TELLEZ WESTWOOD PROFESSIONAL SERVICES, INC. 210-807-9030 DATE: N:\0077606.00\_CAD\_Civil\0077606.00-CV.dwg 10/14/2026 CIVIL ENGINEER OF RECORD BRENDAN MILLER WESTWOOD PROFESSIONAL SERVICES, INC. 720-315-1045 REV: LAND USE COUNSEL SEAN LAKE PEW & LAKE, PLC 480-461-4670 SHEET: BYW-C-001 E OWNER/DEVELOPER BENCHMARK ELLSWORTH ENERGY CENTER, LLC WARNER ROAD 700 UNIVERSE BOULEVARD CITY OF MESA BENCHMARK. BRASS TAG LOCATED AT THE NORTHWEST CORNER INTERSECTION OF ELLSWORTH & JUNO BEACH, FL 33408 Phone (214) 473-4640 2901 Dallas Parkway, Suite 400 ELLIOT ON CONCRETE PAD. EXISTING CONDITIONS PLAN Tol Free (888) 937-5150 Plano, TX 75093 ELEVATION: 1405.91 westwoodps.com DATUM: NAVD88 ROAD SITE ROAD Westwood Professional Services, Inc. ENGINEER E STARFIRE AVE Arizona Reg. Firm NO. F-1406398-2 ENERGY STORAGE SYSTEM WESTWOOD PROFESSIONAL SERVICES BASIS OF BEARING HAWES ST. 2901 DALLAS PARKWAY, SUITE 400 ELLSWORTH BASIS OF BEARING IS S89'33'17E, ALONG THE NORTH LINE OF PLANO, TX 75093 ROUTE THE SOUTHEAST QUARTER OF SECTION 21, TOWNSHIP 1 SOUTH, PHONE: (214) 473-4640 RANGE 7 EAST OF THE GILA AND SALT RIVER BASE AND CONTACT: BRENDAN MILLER 24 MERIDIAN, MARICOPA COUNTY, ARIZONA 8759 E STARFIRE AVENUE PHONE: (720) 315-1045 RAY ROAD MESA, ARIZONA LEGEND: VICINITY MAP NTS PROPERTY BOUNDARY SEC SUNBELT MESA RAY 202 PARCEL LINE PROPERTY SECTION LINE RIGHT-OF-WAY LINE TRACT A & A PORTION OF LOT 1, VIEW 202, AS RECORDED IN BOOK 1638 OF MAPS, PAGE 11 OF MARICOPA PREPARED FOR: EX. EASEMENT LINE COUNTY, ARIZONA, LOCATED WITHIN THE SOUTH HALF OF THE SECTION 21, TOWNSHIP 1 SOUTH RANGE 7 2700 EX. MAJOR CONTOUR Ellsworth Energy EX. MINOR CONTOUR EAST, OF THE GILA AND SALT RIVER MERIDIAN, MARICOPA COUNTY, ARIZONA EX. FLOW ARROW Center, LLC EX. FIRE HYDRANT EX. WATER METER EX. WATER VALVE ELLSWORTH 1 ENERGY 700 Universe Boulevard EX. SANITARY SEWER Juno Beach, FL 33408 CENTER - PROJECT DATA: EX. SANITARY SEWER MANHOLE REVISIONS: EX. STORM SEWER PROJECT ADDRESS: 8759 STARFIRE AVENUE, MESA, # DATE COMMENT BY CHK APR EX. BACKFLOW PREVENTER AZ 85212 EXISTING CHANNEL EX. MONUMENT LINE A 05/14/2026 ISSUED FOR PERMIT DM MS BM EX. HANDHOLE COVER 1382 N=847170.66 PARCEL NUMBER: A PORTION OF 304-31-044E B 06/10/2026 ISSUED FOR PERMIT DM MS BM 1380 E=783372.54 N=847177.15 1378 NOTES EXISTING HANDHOLE EXISTING MONUMENT LINE EXISTING ZONING: LI/PAD C 07/10/2026 ISSUED FOR PERMIT DM MS AK E=782536.80 E. STARFIRE AVENUE D 08/14/2026 ISSUED FOR PERMIT MP MS BM 1. ALTA SURVEY FEATURES SHOWN ARE BASED ON 1376 PROPOSED ZONING: LI DATA FROM HUNTER ENGINEERING DATED EXISTING BASIN REMOVE AND DISPOSE E 10/14/2026 ISSUED FOR PERMIT DM MS BM 12/17/2024. EXISTING STORM LINE AND HEADWALL GENERAL PLAN DESIGNATION: REGIONAL 2. TOPO FEATURES SHOWN ARE BASED ON DATA 1375 COORDINATE WITH OWNER (TO BE REMOVED ) N=847111.95 1381 EMPLOYMENT CENTER 1382 FROM COLLIERS ENGINEERING & DESIGN E=783400.15 1379 1380 DATED 10/28/2025. 1373 1377 PROJECT ACREAGE: 21.8 AC 1375 1377 EXISTING BASIN EXISTING BASIN 1379 PROPOSED USE: BATTERY ENERGY STORAGE SYSTEM 1378 1381 1374 (BESS) AND RELATED ANCILLARY STRUCTURES 1381 1382 PAD: ORDINANCE #5976 1381 61 61 1382 PARKING SPACES REQUIRED: 4 PARKING SPACES PROVIDED: 4 BOL LG JF2 DC LINK 5.1: 262 PARCEL NO. 1 EOL LG JF2 DC LINK 5.1: 334 EXISTING STOCKPILE BOL PE FP4200M2: 49 1382 EOL PE FP4200M2: 62 **BOL: BEGINNING OF LIFE **EOL: END OF LIFE 1381 1380 EXISTING BUILDING 1392 PROPERTY BOUNDARY 1391 APPROXIMATE LOCATION OF EXISTING CONDUIT STUB OUT 1379 1389 EXISTING BUILDING 1387 EXISTING WATER VALVE (TYP) TRACT 1384 1382 1379 EXISTING MAIN WATER LINE (TYP) EXISTING RIPRAP TO BE A 1380 REMOVED (BY OTHERS) 1378 N=846607.51 E=784125.81 1381 N=846607.13 E=783342.81 1382 STATE EXISTING BASIN EXISTING RIPRAP TO BE EXISTING SANITARY SEWER (TYP) (TO BE RESHAPED) REMOVED EXISTING FIRE HYDRANT (TYP) 1383 1384 ROUTE EXISTING CHANNEL EXISTING SANITARY SEWER MANHOLE (TYP) 1376 (TO BE REMOVED) 24 1377 PROPERTY BOUNDARY 1378 0' 80' 160' 240' 1379 1380 1381 1381 PARCEL NO. 1 Ellsworth I Energy Center EXISTING WATER METER (TYP) City of Mesa, Arizona 1384 1380 EXISTING DRYWELL (TYP) N=846184.91 1376 1378 EXISTING PARKING LOT 1373 E=783228.09 PROPERTY BOUNDARY 1374 1376 EXISTING BASIN 1372 1371 1371 1372 1376 1376 (TO BE RESHAPED) 1375 Existing Conditions Mak 1380 1379 1380 Dallas Plan PM N=846177.42 5:47 E=784126.02 STATE 10/14/2026 1381 EXISTING RIPRAP TO BE 1381 REMOVED (BY OTHERS) ROUTE 1382 TRACT 1384 24 1386 1388 1389 1389 ISSUED FOR PERMIT 1390 A EXISTING BUILDING EXISTING BUILDING 1381 N:\0077606.00\_CAD\_Civil\0077606.00-EX-SOUTH.dwg 1381 DATE: 10/14/2026 REV: 1380 SHEET: BWY-C-100 E N 845944 67 OWNER/DEVELOPER BENCHMARK WARNER ROAD ELLSWORTH ENERGY CENTER, LLC CITY OF MESA BENCHMARK. BRASS TAG LOCATED AT THE NORTHWEST CORNER INTERSECTION OF ELLSWORTH & 700 UNIVERSE BOULEVARD Phone (214) 473-4640 2901 Dallas Parkway, Suite 400 ELLIOT ON CONCRETE PAD. OVERALL SITE PLAN JUNO BEACH, FL 33408 Tol Free (888) 937-5150 Plano, TX 75093 ELEVATION: 1405.91 ROAD SITE ROAD westwoodps.com DATUM: NAVD88 Westwood Professional Services, Inc. E STARFIRE AVE ENGINEER HAWES ST. Arizona Reg. Firm NO. F-1406398-2 ENERGY STORAGE SYSTEM ELLSWORTH BASIS OF BEARING WESTWOOD PROFESSIONAL SERVICES ROUTE 2901 DALLAS PARKWAY, SUITE 400 BASIS OF BEARING IS S89'33'17E, ALONG THE NORTH LINE OF PLANO, TX 75093 24 THE SOUTHEAST QUARTER OF SECTION 21, TOWNSHIP 1 SOUTH, PHONE: (214) 473-4640 RANGE 7 EAST OF THE GILA AND SALT RIVER BASE AND CONTACT: BRENDAN MILLER MERIDIAN, MARICOPA COUNTY, ARIZONA 8759 E STARFIRE AVENUE RAY ROAD PHONE: (720) 315-1045 MESA, ARIZONA VICINITY MAP LEGEND: NTS PROJECT BOUNDARY SEC SUNBELT MESA RAY 202 PROPERTY SECTION LINE DL DISTURBANCE LIMITS RIGHT-OF-WAY LINE TRACT A & A PORTION OF LOT 1, VIEW 202, AS RECORDED IN BOOK 1638 OF MAPS, PAGE 11 OF MARICOPA PREPARED FOR: EX. EASEMENT LINE COUNTY, ARIZONA, LOCATED WITHIN THE SOUTH HALF OF THE SECTION 21, TOWNSHIP 1 SOUTH RANGE 7 2700 EX. MAJOR CONTOUR Ellsworth Energy EX. MINOR CONTOUR EAST, OF THE GILA AND SALT RIVER MERIDIAN, MARICOPA COUNTY, ARIZONA EX. FLOW ARROW Center, LLC EX. FIRE HYDRANT EX. WATER METER EX. WATER VALVE ELLSWORTH 1 ENERGY 700 Universe Boulevard EX. SANITARY SEWER Juno Beach, FL 33408 CENTER - PROJECT DATA: EX. SANITARY SEWER MANHOLE HH HH REVISIONS: EX. STORM SEWER FACP AREA PROJECT ADDRESS: 8759 STARFIRE AVENUE, MESA, EXISTING SUBSTATION # DATE COMMENT BY CHK APR EX. BACKFLOW PREVENTER PROPOSED 38' WIDE X 13' HIGH SECURITY GATE AZ 85212 EX. MONUMENT LINE PROPOSED 4 - 9'X20' PARKING A 05/14/2026 ISSUED FOR PERMIT DM MS BM PROPOSED SAWCUT LINE PARCEL NUMBER: A PORTION OF 304-31-044E PROPOSED EASEMENT LINE DRAINAGE EASEMENT B 06/10/2026 ISSUED FOR PERMIT DM MS BM PROPOSED 100' BATTERY SETBACK LINE PROPOSED 30' DRIVEWAY PER AREA RESERVED FOR MV CITY OF MESA DETAIL NO. EXISTING ZONING: LI/PAD C 07/10/2026 ISSUED FOR PERMIT DM MS AK PROPOSED ACCESS ROAD 15.0' LANDSCAPE YARD PROPOSED SECURITY WALL DL DL DL DL DL DL DL DL DL DL DL M-1212 PROPOSED ZONING: LI D 08/14/2026 ISSUED FOR PERMIT MP MS BM DL PROPOSED DRAINAGE BASIN E. STARFIRE AVE E 10/14/2026 ISSUED FOR PERMIT DM MS BM 16.1' HH JBOX12B2 HH HH JBOX12A2 HH HH JBOX12A1 HH HH JBOX12C2 HH HH HH JBOX12C1 HH HH JBOX11C1 HH HH JBOX11A2 HH HH JBOX11A1 HH HH HH JBOX11B1 HH HH HH JBOX11B2 HH JBOX22B1 HH HH JBOX22B2 HH HH GENERAL PLAN DESIGNATION: REGIONAL PROPOSED CULVERT DL R55.0' 26.0' 20.0' GATE SETBACK PROPOSED 20' SECURITY GATE EMPLOYMENT CENTER PROPOSED SUBSTATION DL PROPOSED RIPRAP 20.0' 39.7' PROJECT ACREAGE: 21.8 AC R35.0' 290.0' PROPOSED FIRE HYDRANT 26.0' 143.0' R35.0' PROPOSED 15' LANDSCAPE YARD PROPOSED USE: BATTERY ENERGY STORAGE SYSTEM DL PROPOSED SUBSTATION R70.0' DL (BESS) AND RELATED ANCILLARY STRUCTURES UMVX PROPOSED UNDERGROUND MV 15.0' LANDSCAPE YARD (1.93 AC) CABLE 10.0' (SEE SUBSTATION SITE PROPOSED SWALE UMV21B2 50.4' PAD: ORDINANCE #5976 PLAN FOR EQUIPMENT PROPOSED STORM DRAIN DETAILS) 55.7' PARKING SPACES REQUIRED: 4 R41.0' DL PARKING SPACES PROVIDED: 4 DL 10.3' EXISTING FIRE HYDRANT (TYP) NOTES BOL LG JF2 DC LINK 5.1: 262 PARCEL NO. 1 EXISTING UNDERGROUND EOL LG JF2 DC LINK 5.1: 334 320.0' R70.0' WATER LINE (TYP) BOL PE FP4200M2: 49 1. ALTA SURVEY FEATURES SHOWN ARE BASED ON EOL PE FP4200M2: 62 DATA FROM HUNTER ENGINEERING DATED DL R35.0' DL EXISTING STORM SEWER (TYP) **BOL: BEGINNING OF LIFE 12/17/2024. UMV21C1 158.7' **EOL: END OF LIFE 2. FURTHER DETAILS ARE SUBJECT TO CITY OF 125.9' UMV21C1 EXISTING CATCH BASIN (TYP) UMVAUX21D1 MESA AND ARIZONA STATE REQUIREMENTS. BATTERY HEIGHT: 11.5 FT DL 100.0' REMOTE FACILITY 21.2' UMV21C1 UMV21C1 DL BATTERY SETBACK UMVAUX21D1 AREA RESERVED FOR MV UMVAUX22D1 UMV22A2 PROPOSED BASIN EXISTING BUILDING UMV22A1 UMV21A2 (BY OTHERS) DL UMV21B2 UMVAUX21D1 UMV21B2 UMVAUX21D1 UMV21B2 20.0' UMV21B1 UMV21B1 UMV21A1 UMV21A1 DL EXISTING BUILDING 113.1' UMV21C1 UMVAUX21D1 UMV21C1 50.2' DL UMV22A2 EXISTING SANITARY SEWER (TYP) 349.2' UMV21A2 UMV22A1 UMVAUX22D1 300.0' PROPOSED SWALE (TYP) UMV21B1 DL 10.2' 15.0' LANDSCAPE YARD PROPOSED UNDERGROUND DL MV CABLE (TYP) UMVAUX21D1 UMV21C1 26.0' UMV21C1 220.2' UMV22A2 R55.0' UMV22A1 PROPOSED 13' HIGH SECURITY WALL (TYP) DL UMVAUX22D1 DL DL DL DL DL DL DL DL DL DL DL R35.0' (TYP) 20.0' 113.1' 26.0' UMV21C1 DL UMV21C1 14.6' UMVAUX21D1 UMV22A2 PROPOSED 13' HIGH SECURITY WALL DL 161.2' UMV22A1 R55.0'(TYP) PROPOSED 20.0' ACCESS ROAD (TYP) UMV21C1 UMV21C1 UMV21C1 UMV21C1 R35.0' (TYP) UMVAUX22D1 83.0' DL 0' 80' 160' 240' PROPOSED BASIN 349.2' 300.0' 24.8' TYPICAL EQUIPMENT LAYOUT: DL 349.2' 113.1' 349.2' 232.1' SCALE: 1" = 40' UMV22A2 MAX EQUIPMENT HEIGHT = 11.5' 300.0' UMV22A1 83.0' 39.2' UMVAUX22D1 5.0' 26.0' DL DL 26.0' ACCESS ROAD PROPOSED BASIN UMVAUX22D1 UMVAUX22D1 UMVAUX22D1 (BY OTHERS) 14.0' 113.1' 8.4' UMV22A2 113.1' 3.0' PROPOSED EMERGENCY OVERFLOW (TYP) DL UMV22A1 349.2' Ellsworth I 343.2' DL PROPOSED FIRE HYDRANT (TYP) 26.0' 3.0' 300.0' 300.0' PROPOSED PE FP4200M PCS PROPOSED RIPRAP Energy Center 23.5' INVERTER EQUIPMENT R35.0' DL 64.0' UMV22A1 UMV22A1 UMV22A1 UMV22A1 DL STATE 40.0' DL R35.0' PROPOSED LG JF2 DC LINK 5.1 City of Mesa, Arizona 15.0' 26.0' BATTERY STORAGE EQUPIMENT DL PROPOSED 20.0' ACCESS ROAD (TYP) ROUTE DL 7.0' 850.4' DL 40.0' 26.0' PROPOSED SAWCUT LINE 7.0' 24 40.0' E. POINT DL Mak DL DL DL DL DL DL DL DL TWENTY-TWO BLVD Overall Site Plan 158.4' DL DL DL DL Dallas DL PM PROPOSED BOL BATTERY STORAGE EQUIPMENT (TYP) 5:52 DL PROPOSED BOL PCS (TYP) 10/14/2026 DL 6.5' PROPERTY BOUNDARY PROPOSED 34' WIDE X 13' HIGH SECURITY GATE DL DL PROPOSED 13' HIGH SECURITY WALL APPROXIMATE AREA OF EXISTING BUILDING APPROXIMATE LOCATION OF ISSUED FOR PERMIT FUTURE ACCESS EASEMENT APPROXIMATE AREA OF N:\0077606.00\_CAD\_Civil\0077606.00-OA-SOUTH.dwg PROPOSED SECONDARY FIRE ACCESS EXISTING BUILDING 7.0' 21.3' DATE: 10/14/2026 DL DL REV: SHEET: BYW-C-200 E