INTRODUCTION... 1 II. PROJECT IDENTIFICATION... 1 III.

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2 TABLE OF CONTENTS I. INTRODUCTION... 1 II. PROJECT IDENTIFICATION... 1 III. PROJECT SELECTION... 1 Safety...1 Non-reimbursable Portions of Relocation Projects...2 Load Growth Improvements...2 Reliability...2 Target Areas...2 IV. LIST OF PROJECTS Undergrounding Projects Spreadsheet...3 APPENDIX A Underground Project Summary Sheets 2015 Girdwood Olympic Mountain Loop... A Old Seward Hwy - 92nd Ave (State Relocation)... A Spring Hill Estates... A Autumn Ridge... A Bentzen Subdivision...A Heritage Heights... A Dowling Substation Feeder 512 and 34.5 kv Upgrade... A Spenard 312 to LaTouche A Dowling LaTouche 122-4/0 Upgrade... A Dowling 412/612-4/0 Upgrade to 750 kcmil... A Jewel Lake Road - Strawberry to 84th... A Dowling Subdivision... A Arctic Boulevard... A Muldoon Road - Creekside to Northern Lights... A DeBarr Road - Creekside to Muldoon... A Old Seward Hwy - O'Malley Rd. to Huffman Rd.... A Wisconsin Street... A Old Seward Hwy - Dimond Blvd. to O'Malley Rd.... A-18

3 I. INTRODUCTION On March 1, 2005, the Anchorage Assembly adopted certain revisions to Section 21.07, Utility Distribution Facilities, of the Anchorage Municipal Code. These revisions required an electric utility to include as part of its annual capital improvement plan, a five-year undergrounding program ( F.1). In each of the years of this program the electric utility shall plan on expending at least two percent of a three-year average of its annual gross retail revenues derived from utility service connections within the municipality ( G.1a). This requirement means that Chugach Electric Association (Chugach) is required to spend approximately $3.2 million annually to underground existing overhead facilities. Over expenditures or under expenditures may be carried over as an adjustment to the following year s obligation. In the development of the five-year undergrounding program the electric utility is allowed to choose which existing lines to underground. Specifically, priorities for the program shall be based on undergrounding in conjunction with the electric utility s essential system improvements and then by target area ( F.1). The following document contains Chugach s five-year undergrounding program. Overall, the plan calls for $16,050,000 to be expended on undergrounding existing overhead lines from 2015 to 2019, for an average of $3,210,000 annually. The projects were chosen taking into account Chugach's overall system needs and consideration of the designated target areas. The inclusion of a project within this plan does not guarantee that the project will be constructed in the designated year. II. PROJECT IDENTIFICATION In order to reduce the overall financial impact of the ordinance on the utility ratepayers, in the revisions adopted by the Anchorage Assembly, provisions were made for utilities to choose projects that have benefits that are not just aesthetic. Therefore, following the direction of the ordinance, Chugach has determined projects essential to the continued reliable operation of the electrical system by reviewing its system outage data, results from an ongoing inspection program, load growth analysis and target areas. III. PROJECT SELECTION Chugach s undergrounding projects are intended to implement one or a combination of five main objectives. These objectives are listed in order of priority; however, the priority of a project can change depending on the specific project and how it relates to maintaining the integrity of the Chugach system. 1. Safety: These projects will improve the safety of our system by retiring overhead facilities as they are identified where clearances or strength requirements are less than mandated by the National Electric Safety Code (NESC). Lines over residential houses or buildings, although not necessarily a code violation, pose a 1

4 potential safety concern and will attempt to be relocated underground as part of this plan. 2. Non-reimbursable Portions of Relocation Projects: State and Municipal road projects often include the relocation of existing utility facilities at the expense of the road project. Under this category, Chugach will fund any betterment undertaken by the utility embedded within the relocation work or add small system improvements that may lie just outside of the scope of the road project but that are ideal to construct at the same time. 3. Load Growth Improvements: Existing overhead facilities are sometimes insufficient to handle the additional load of a large commercial or residential development. Instead of reconductoring an existing pole line with larger conductor, these projects will install larger underground conductor and retire the overhead facilities. 4. Reliability: Chugach realizes the need for reliable electrical service and on an ongoing basis analyzes the system to ensure this reliability remains at an acceptable standard. These projects include loop closures to provide an alternate feed for radial underground circuits. Some areas have higher numbers of wind related or tree related outages. These areas may benefit by retiring overhead systems and replacing them with underground facilities. 5. Target Areas: Existing overhead facilities located in target areas as defined in Designation of Target Areas ( F) emphasize locations that would benefit significant numbers of people. Some of the areas specifically listed include central business areas, major traffic corridors, parks and recreational areas, and school and university areas. IV. LIST OF PROJECTS The following spreadsheet lists the undergrounding projects to be performed in the years from 2015 to Project summary sheets have been created and are included in Appendix A. 2

5 $ 16,050,000 $ 3,200,000 $ 3,200,000 $ 3,150,000 $ 3,300,000 $ 3,200,000 Last Revised: 12/09/ WK Overhead to Underground Projects Chugach Electric Association, Inc. Project Description Page Number Grid Work Order Cost Estimate Girdwood Olympic Mountain Loop - OH to UG Conversion A E $ 100,000 $ 100,000 $ - $ - $ - $ - Old Seward Hwy - 92nd Ave (State Relocation) A E $ 225,000 $ 225,000 $ - $ - $ - $ - Spring Hill Estates - OH to UG Conversion A E $ 160,000 $ 160,000 $ - $ - $ - $ - Autumn Ridge - OH to UG Conversion A E $ 110,000 $ 110,000 $ - $ - $ - $ - Bentzen Subdivision - OH to UG Conversion A E $ 150,000 $ 150,000 $ - $ - $ - $ - Heritage Heights - OH to UG Conversion A E $ 200,000 $ 200,000 $ - $ - $ - $ - Dowling Substation Feeder OH to UG Conversion A7 1935, 2035 E $ 130,000 $ 130,000 $ - $ - $ - $ - Dowling Substation Upgrade 34.5kV - OH to UG Conversion A7 1935, 2035 E $ 525,000 $ 525,000 $ - $ - $ - $ - Spenard 312 to Latouche OH to UG Conversion A , 1832 E $ 2,800,000 $ 1,600,000 $ 1,200,000 Dowling Latouche 122-4/0 upgrade OH to UG conversion A TBA $ 500,000 $ - $ 500,000 $ - $ - $ - Dowling 412/612-4/0 upgrade to 750kcmil - OH to UG Conv. A TBA $ 1,500,000 $ - $ 1,500,000 $ - $ - $ - Jewel Lake Road - Strawberry to 84th OH to UG Conversion A , 2225 TBA $ 1,250,000 $ - $ - $ 1,250,000 $ - $ - Dowling Subdivision - OH to UG Conversion A TBA $ 600,000 $ - $ - $ 600,000 $ - $ - Arctic Boulevard - OH to UG Conversion A , 2229 TBA $ 1,300,000 $ - $ - $ 1,300,000 $ - $ - Muldoon Road - Creekside to Northern Lights OH to UG Conv. A , 1540, 1640 TBA $ 1,750,000 $ - $ - $ - $ 1,750,000 $ - DeBarr Road - Creekside to Muldoon OH to UG Conversion A TBA $ 550,000 $ - $ - $ - $ 550,000 $ - Old Seward Hwy - O'Malley Rd to Huffman Rd OH to UG A TBA $ 1,000,000 $ - $ - $ - $ 1,000,000 $ - Wisconsin Street - OH to UG Conversion A , 1726 TBA $ 1,500,000 $ - $ - $ - $ - $ 1,500,000 Old Seward Hwy - Dimond Blvd to O'Malley Rd OH to UG A , 2432, 2532 TBA $ 1,700,000 $ - $ - $ - $ - $ 1,700,000 OH to UG: overhead to underground Estimated Project Expenditures for Five-Year Plan $ 16,050,000 Estimated Spending Requirements for Five-Year Plan $ 15,725,674

6 Appendix A Underground Project Summary Sheets 4

7 GWSS UNDERGROUNDING PROJECT GIRDWOOD MOUNTAIN LOOP OH to UG Conversion PROJECT NUMBER: E PROJECT COST: $100,000 This project will retire five distribution poles in the Girdwood/Alyeska area and install underground facilities. Chugach is using a Municipality of Anchorage / State of Alaska road project to facilitate this underground project. Costs associated with stream crossing, SWPPP and traffic control will be included under the road contractor s project. Chugach will not only underground these existing facilities, but at the same time loop two underground single phase radials in the process. For additional information concerning this project, please contact Shelly Schmitt at Secondary Overhead Conductor ASPEN RD GWSS 322 GWSS 422 BRIGHTON RD ALYESKA AV GARMISCH RD LOVELAND RD CORTINA RD DAVOS RD ALYESKA HWY Snow Ridge Condos ARLBERG AV CR YSTA L RD GWSS 422 GWSS Alyeska Day Lodge Alyeska Race Training Center TAOS RD ,560 2,340 3,120 1 inch = 448 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :5,376 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\Contents\2015 Girdwood Mountain Loop.mxd Last Updated: 10/23/2014 WK

8 LONG ST NEW SEWARD HWY SLSS UNDERGROUNDING PROJECT OLD SEWARD HWY AND 92ND AVENUE OH to UG Conversion PROJECT NUMBER: E PROJECT COST: $225,000 This safety and capacity project will replace 0.3 mile of the three-phase overhead 336 kcmil underbuild circuit with750 kcmil underground cable in duct. This work is in conjunction with the State of Alaska DOT road relocation project at Old Seward Hwy and 92nd Ave. For additional information concerning this project, please contact Shelly Schmitt at house of critters K&W Interiors Full Swing Golf 2431 OLD SEWARD HWY ABBOTT RD SHORT ST ,150 1,725 2,300 1 inch = 333 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 BRAYTON DR SLSS 412 SLSS 412 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2015 Old Seward Hwy 92nd Ave.mxd Last Updated: 12/9/2014 WK

9 DLSS 212 CARLSON RD JUPITER DR OMSS 412 OMSS UNDERGROUNDING PROJECT SPRING HILL ESTATES OH to UG Conversion PROJECT NUMBER: E PROJECT COST: $160,000 The overhead distribution along the west side of Spring Hill Drive will be converted to underground. This line has exposure to large trees and was impacted heavily during the 2012 windstorm. The circuit feeds AK Child & Family s Jesse Lee Campus (formerly Alaska Children s Services) as well as an underground residential circuit. The new underground circuit will be fed directly from the Hillside feeder. Feeders are high priority circuits to be re-energized during major windstorm outages; customers with underground feeder ties will see shorter outage durations. For additional information concerning this project, please contact Shelly Schmitt at SOLAR DR 2336 DLSS 212 BIRCH RUN DR 2436 E 96TH AVE MARS DR DLSS 212 Jesse Lee Home-Bldg 1 Jesse Lee Home-Gilbert Center Jesse Lee Home-Bldg 4 ABBOTT RD Jesse Lee Home-Benson Center BLUE HERO N CIR SAHALEE DR SPRING HILL DR TRAILSIDE ELEMENTARY SCHOOL 2337 NICKELL CIR Elitas Golden Home Care ,560 2,340 3,120 1 inch = 448 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :5,376 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\Contents\2015 Spring Hills Estates.mxd Last Updated: 12/11/2014 WK

10 OMSS 212 STRUTZ AV OMSS 212 OMSS 412 OMSS UNDERGROUNDING PROJECT AUTUMN RIDGE OH to UG Conversion PROJECT NUMBER: E PROJECT COST: $110,000 The overhead distribution line along the east side of Strutz Avenue will be converted to underground. This line has exposure to large trees and feeds a residential underground circuit with many homes; it was impacted heavily during the 2012 windstorm. The project will provide an underground feed directly from the main feeder. Feeder circuits are high priority to be re-energized during major windstorm outages; customers with no overhead obstructions between them and the feeder circuit will see shorter outage durations. For additional information concerning this project, please contact Shelly Schmitt at SAHALEE DR SPRING HILL DR TRAILSIDE ELEMENTARY SCHOOL NICKELL CIR Service High Pool SERVICE SENIOR HIGH SCHOOL Elitas Golden Home Care E NINETY-EIGHTH AV ABBOTT RD ZIEML AK CIR ,560 2,340 3,120 1 inch = 448 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :5,376 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\Contents\2015 Autumn Ridge.mxd Last Updated: 12/09/2014 WK

11 SPSS 412 SPSS 412 SPSS 412 SPSS 412 SPSS UNDERGROUNDING PROJECT BENTZEN SUBDIVISION - ADDITION #5 OH to UG Conversion PROJECT NUMBER: E PROJECT COST: $150,000 The overhead distribution line from Northwood Drive to Melvin Avenue along Aspen Drive will be converted from overhead to underground. Five poles and 700 feet of #2 ACSR conductor will be retired and replaced with underground 1/0 concentric cable. The overhead line was impacted heavily by fallen trees during the 2012 windstorm; converting it to underground will decrease the number and duration of outages in this area. For additional information concerning this project, please contact Shelly Schmitt at LAKESHORE MOTOR INN Chandler Inn 1827 APSS 412 APSS 412 ASPEN DR Comfort Suites APSS 412 IRIS DR APSS 412 FORREST RD MALIBU RD KLAMATH DR MELVIN AVE W INTERNATIONAL AIRPORT RD Anchorage Montessori TERRACE BY THE LAKE - BLDG. A NORTHWOOD ELEMENTARY SCHOOL AMERICAN fst FREIGHT MICROTEL INN & SUITE ,560 2,340 3,120 1 inch = 448 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :5,376 OLD INT. AIRPORT RD SPSS 212 SPSS 412 ATSS 712 HA RU LA NORTHWOOD DR SPSS 212 W FORTY-FIFTH AVE W FORTY-EIGHTH AVE VAN BUREN ST 1828 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\Contents\2015 Bentzen Subdivision.mxd Last Updated: 10/27/2014 WK

12 OMSS 212 OMSS UNDERGROUNDING PROJECT HERITAGE HEIGHTS OH to UG Conversion PROJECT NUMBER: E PROJECT COST: $200,000 The overhead distribution line running parallel to and north of Barry Avenue will be removed and converted to underground. This line has exposure to large trees and feeds a residential underground circuit with many homes. These homes were impacted heavily during the 2012 windstorm. This project will provide an underground feed directly from the main feeder to avoid the overhead obstructions that are present. Feeder circuits are a high priority to re-energize during an outage; undergound laterals tied to the feeder experience higher reliability and shorter resoration times. For additional information concerning this project, please contact Shelly Schmitt at BIRCH RD ABBOTT RD CHISANA WY YUKON RD OLYMPIA CIR OMSS BARRY AV BRIEN ST OMSS 212 MAIN TREE DR ,150 1,725 2,300 1 inch = 333 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2015 Heritage Heights.mxd Last Updated: 12/9/2014 WK

13 DLSS UNDERGROUNDING PROJECT DOWLING SUBSTATION FEEDER 512 AND 34.5kV UPGRADE PROJECT NUMBERS: E AND E PROJECT COST: $655,000 This reliability and capacity improvement project will replace the 34.5kV overhead getaway with parallel 1000kcmil underground circuits (INSS 732 and UVSS 1232) in duct. One critical load limiting 4/0 ACSR overhead span at the source end of feeder DLSS 512 will be replaced with 750kcmil underground in duct. A vault will provide for the future underground conversion of DLSS 412 and 612. For additional information concerning this project, please contact Shelly Schmitt at DLSS DLSS 412 DLSS 412 DLSS 612 DLSS 512 Project Location DLSS DLSS 212 DLSS 512 DLSS 212 DLSS 512 DLSS ,150 1,725 2,300 1 inch = 333 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 DLSS 212 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2015 Dowling Substation Feeder 512 and 34.5kV Upgrade.mxd Last Updated: 12/9/2014 gc/wk

14 CORDOVA ST C ST B ST A ST DENALI ST LASS 166 EAGLE ST BERING ST INGRA ST KOYUK AVE W FORTY-EIGHTH AVE JUNEAU ST E FIFTY-THIRD AVE TOGIAK CIR B ST A ST LASS 155 ATSS 612 LASS 155 A ST UNDERGROUNDING PROJECT PROJECT COST: $2,800,000 SPENARD 312 TO LATOUCHE 166 4/0 ACSR Three-Phase Upgrade to 750 kcmil PROJECT NUMBER: E W FORTY-SECOND AVE Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\ Spenard 312 to Latouche 166.mxd Last Updated: 12/11/2014 WK E FORTY-SECOND PL 1731 State Farm Insurance US FISH AND WILDLIFE / Tudor Bus Ctr TUDOR PARK PLAZA Office Depot Hampton Inn AM Vets / Music Man ³ E TUDOR RD W TUDOR RD Parkwood Inn West Center Car Quest Hilton Garden Inn Central Environmental Inc FAIRBANKS ST EAGLE ST E FORTY-FIFTH AVE LASS 166 AIH Buildings Homewood Suites Hotel 1832 EGAVIK DR UHAUL main bldg Continental Motors Rehab Center Alaska Village Electric Co-op Strip Mall PROVIDENCE EXTENDED CARE FACILITY E FIFIETH AV This project will replace 1.0 mile of 4/0 ACSR 3-phase overhead with 750 kcmil underground on the Spenard 312 to LaTouche 166 tie (Grids , and 1832). This upgrade will improve the system capacity for existing and new load growth in addition to improving reliability. The summer peak loading is near the capacity limit of the 4/0 ACSR circuit. Under n-1 contingency conditions this represents one of the top three heaviest loaded 4/0 overhead line segments on the distribution system. The overhead line is presently located on the south boundary of the ML&P service area and will be relocated to the south side of Tudor Road (north boundary of the Chugach service area) where it will be available to feed loads in the increasingly densely loaded C Street corridor. The relocation of the line on a heavily used arterial meets the "target area" underground conversion focus. GCI Warehouse Alaska Rock Gym Rodda Paints E FIFTIETH AVE Continental Honda/Acura Motel 6 Fairfield Inn Suites This is for reference and review purposes only of proposed Undergrounding Projects and is for official Chugach RODDA PAINTS Fats Suto Service Crowne Plaza Hotel Korean Christian Church For additional information concerning this project, please contact Lou Mass at E INTERNATIONAL AIRPORT RD AK Bearing Hilti F.A.T.S. Alaska Tent and Tarp Grand Duchess Hope Community Resources ATSS 312 ARCTIC ROAD RUNNER STUSSER ELECTRIC 1930 LITHIA HYUNDAI 0 1,450 2,900 POLAR SUPPLY 5,800 Bailey's Furniture 1 inch = 500 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :6, ATSS 312

15 LAUREL ST LASS 177 S TAHITI LP PIPER ST DLSS 412 DLSS 612 DLSS UNDERGROUNDING PROJECT DOWLING 412 TO LaTOUCHE 122 OH to UG Conversion PROJECT NUMBER: TBA PROJECT COST: $500,000 This safety and capacity improvement project will replace 0.6 miles of the 4/0 ACSR three-phase overhead underbuild circuit (DLSS 412) with a 750 kcmil underground circuit in duct. This is the second phase of a project from Dowling Substation and will complete the capacity upgrade that ties in to the existing 750kcmil feeder tie to Latouche Substation. The 34.5kV overhead ACSR feeder (INSS 732) will benefit from the increased pole strength capacity and conductor sag clearance. Under the N-1 contingency condition the DLSS 412 circuit has the heaviest loaded 4/0 ACSR segment the remains on the Chugach distribution system. For additional information concerning this project, please contact Shelly Schmitt at SAMOA ST US Post Office 1934 NORTHERN LIGHTS ABC ELEMENTARY American Hyperbarics 2033 TONGA ST FIJI ST TINIAN ST RAYMOND ST MEGO ST E DOWLING RD MEADOW VIEW DR ROSE HIP CIR E SIXTY-FOURTH AVE NADINE ST NEWT DR DOIL DR G R O SS DR NORM DR 2034 DOIL CIR AWWU Well ,740 2,610 3,480 1 inch = 500 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2016 Dowling 412 TO 122.mxd Last Updated: 12/11/2014 WK

16 DLSS 412 DLSS 612 DLSS UNDERGROUNDING PROJECT DOWLING 412/612 4/0 ACSR Three-Phase Upgrade to 750 kcmil PROJECT NUMBER: TBA PROJECT COST: $1,500,000 This project will replace 0.9 miles of 4/0 ACSR three-phase overhead with 750 kcmil underground on the Dowling 412 to 612 tie (Grid 2034). This upgrade will improve the system capacity for existing and new load growth in addition to improving reliability. The summer peak loading is near the capacity limit of the 4/0 ACSR circuit. Under n-1 contingency conditions, this represents the heaviest loaded 4/0 overhead line segment on the distribution system. The relocation of the line along a new arterial route with rapidly increasing traffic volumes should qualify as a Target Area for underground conversion. For additional information concerning this project, please contact Will Klatt at DLSS 412 DLSS DLSS DLSS 612 DLSS 512 DLSS 212 DLSS 212 DLSS ,320 1,980 2,640 AWWU Well 13 1 inch = 380 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 DLSS 412 DLSS 512 DLSS 512 DLSS 212 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2016 Dowling 612 to 412.mxd Last Updated: 12/12/2014 WK

17 RBSS 212 JLSS 132 LOGANBERRY ST RBSS 212 HUCKLEBERRY ST CRYSTAL ST JLSS 122 JLSS 122 JLSS 122 JLSS UNDERGROUNDING PROJECT JEWEL LAKE ROAD PROJECT NUMBER: TBA Strawberry to 84th Avenue PROJECT COST: $1,200, SAND LAKE ELEMENTARY SCHOOL Under this project, the existing 1/0 ACSR threephase line between Riser Pole 9866 (Grid 2125) and Riser Pole 9708 (Grid 2225) will be replaced with Chugach s standard 750 kcmil underground cable specified for main feeder circuits. Approximately 2200 feet of overhead Raspberry 212 main feeder circuit and 2800 feet of Jewel Lake 132 main feeder circuit along Jewel Lake Road, south of the Raspberry Road intersection, would be retired within the scope of this project. The first phase of this project from Raspberry to Strawberry was completed in The second phase is scheduled for Replacement of this 1/0 ACSR circuit with 750 kcmil cable would increase the feeder transfer capacity from 6 MVA to 13 MVA. This area has also been documented as an area with tree trimming difficulties. By relocating the facilities underground, the reliability associated with tree related outages should improve. This is for reference and review purposes only of proposed Undergrounding Projects and is for official Chugach For additional information concerning this project, please contact Will Klatt at SAND LAKE NORDALE ST CANAL ST 2225 ST. BENEDICT'S SUE ST DEL ST BRENTWOOD DR JEWEL LAKE RD W EIGHTIETH AV ST.BENEDICT'S ST. BENEDICT'S ANCHORAGE FIRE DEPARTMENT STORAGE FACILITY WESTLAKE AV 2325 JLSS 142 MOORLAND ST JLSS 142 STRAWBERRY RD 2226 GLORIA DEI LUTHERN CHURCH JLSS ,060 1,590 2,120 1 inch = 500 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 JLSS 122 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2016 Jewel Lake Road - Strawberry to 84th.mxd Last Updated: 10/29/2014 WK

18 LASS 122 SLSS 712 ROSEWOOD ST LATOUCHE ST SLSS 712 ROWAN ST DLSS 412 BURLWOOD ST DOW PL DLSS 412 DLSS 412 PETERSBURG ST 2017 UNDERGROUNDING PROJECT DOWLING SUBDIVISION PROJECT NUMBER: TBA PROJECT COST: $600,000 This project will upgrade eight spans of #2 ACSR on Dowling Substation Feeder 412 within Dowling Subdivision on the east side of the New Seward Highway between Dowling Road and E 64th Avenue with 750 kcmil underground cable. This project is a component of load reallocation between LaTouche, Sand Lake, Klatt, Dowling and the new substation on O'Malley Road. For additional information concerning this project, please contact Shelly Schmitt at Loomis Inc. GREENWOOD ST HOFFMAN STRAPPING & FASTENING E DOWLING RD HOMER DR NEW SEWARD HWY BRAYTON DR Polaris School M & M DIST SPEEDY AUTO REPAIR 2032 Shop Building 2033 E SIXTY-FOURTH AVE E SIXTY-SIXTH AVE LASS 122 E DRIFTWOOD ST BRAYTON DR ASHWOOD ST DLSS 412 MEADOW ST WATERWOOD Cir LILY POND CIR RIERI E DR E SIXTY-FOURTH AVE 1933 FYFE CIR Multiple Bus NorthSlope Telecom ASKELAND ST E SIXTY-SIXTH AVE ,750 2,625 3,500 1 inch = 500 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :6,000 DLSS 412 Path: I:\I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2017 Dowling Subdivision.mxd Last Updated: 10/29/2014 WK

19 ATSS 412 STANLEY DR ATSS 412 ATSS 412 ATSS 412 PAPAGO PL ATSS 412 ARCTIC BLVD ATSS 412 HART ST 2017 UNDERGROUNDING PROJECT ARCTIC BOULEVARD South of 68th to North of Dimond Boulevard PROJECT NUMBER: TBA PROJECT COST: $1,300,000 W SEVENTIETH AV This project will retire the overhead three-phase line along the west side of Arctic Boulevard from 68th Avenue south to the new underground facilities located 800 feet north of Dimond Boulevard. This main 4/0 ACSR feeder serves significant load off Arctic 412 and ties into the heavily loaded Sand Lake 812 feeder. Summer peak loadsfor Arctic 412 have been exceeding the continuous rated summer limit for 4/0 ACSR conductor of 258 amps. Contingency situations or increased load growth in this area would see overloads on the 4/0 ACSR portions of this feeder. By retiring the 4/0 ACSR and replacing it with 750 kcmil underground cable, the ampacity of this feeder will increase to 550 amps for summer conditions. This is for reference and review purposes only of proposed Undergrounding Projects and is for official Chugach For additional information concerning this project, please contact Shelly Schmitt at W SEVENTY-FIRST AV W SEVENTY-SECOND AV 2129 CAMPBELL ELEMENTARY SCHOOL L INDA LA W EIGHTIETH AV 2229 W SEVENTY-SECOND AV RAPPE CT ATSS HIG H LANDER DR ,050 1,575 2,100 1 inch = 500 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 BRANCHE DR ATSS 412 C ST SLSS 712 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2018 Arctic Blvd.mxd Last Updated: 10/29/2014 WK

20 PATTERSON ST PAXSON DR TAGALAK DR MULDOON RD BRIN EAST VIEW DR EARLY VIEW DR MULDOON CIR This project is the last phase of the replacement of 4/0 ACSR three-phase with 750 kcmil cable in duct between Baxter and DeBarr Substations. The overhead line is non-compliant with regard to the NESC strength requirements and in a known high wind corridor. The capacity increase is required to feed DeBarr Feeder 142 and 152 from the Baxter Substation, particularly in the event of the loss of the DeBarr Substation (transformers, bus or 35 kv feed). The circuit is located along a high visibility arterial and in an area of local load growth. E SEVENTEENTH AVE CHESTER VALLEY ELEMENTARY SCHOOL 1439 YORKSHIRE LA UNDERGROUNDING PROJECT PROJECT NUMBER: TBA For additional information concerning this project, please contact Shelly Schmitt at CHANDALAR DR AUGUSTINE DR MULDOON ROAD Creekside to Northern Lights 1440 TIKCHIK CIR TANGLE CT E NORTHERN LIGHTS BLVD ISLAND DR SUSITNA ELEMENTARY SCHOOL 1640 KALGIN S T EASTBR OOK DR US POST OFFICE CARRS Muldoon PROJECT COST:$1,750,000 CARRS SATELLITE BRINK CT K DR PARK WAY DR STATE ST HALLIGAN ST POPCARY D R HAVITUR WY GREEN DALE DR E TWENTIETH AVE UNNAMED BYRNE DR 1541 E SEVENTEENTH AVE REBEL RIDGE DR H ALLIGAN DR MOLLY O PVT RIDGEWAY AV OWEN CIR VINCE N T ST E NORTHERN LIGHTS BLVD BROOKRIDGE DR ,250 2,500 3,750 5,000 1 inch = 800 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2018 Muldoon Road-Creekside to Northern Lights.mxd Last Updated: 10/29/2014 WK

21 DBSS 172 DBSS 172 DBSS 172 DBSS 172 DBSS 172 DBSS 152 BXSS 182 DBSS 152 DBSS 152 BOSTON ST DBSS UNDERGROUNDING PROJECT DEBARR ROAD Creekside to Muldoon PROJECT NUMBER: TBA PROJECT COST: $550,000 This project will retire 9 distribution poles along DeBarr Road south of Fred Meyer and install underground facilities. With the construction of the Creekside Town Center, Begich Middle School and Wal-Mart the loads in this area have increased and will continue to increase, initiating the need for system improvement projects in this area. DeBarr feeders 152, 162 and 172 were all constructed with 4/0 ACSR overhead main lines and will be upgraded to standard 750 kcmil underground construction. DeBarr 152 and 162 currently run as an overhead double circuit from Patterson to Muldoon along E 10th Avenue, and DeBarr 172 runs overhead down the north side of DeBarr Road from Patterson to Muldoon. For additional information concerning this project, please contact Shelly Schmitt at OLD HARBOR AVE 1340 FRED MEYER ALASKA COMMUNICATIONS SYSTEMS EAST WIRE CENTER DBSS BXSS 182 Hollywood Auto DEBARR RD MULDOON MALL ,400 2,100 2,800 American Legion 1 inch = 400 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS :4,800 DBSS 172 BXSS 182 BXSS 182 BXSS 182 MULDOON RD DBSS 152 DBSS 152 DBSS STATE ST 1441 BXSS 292 Path: I:\I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2018 DeBarr Road - Creekside to Muldoon.mxd Last Updated: 12/11/2014 WK

22 JOHNS RD GREGORY RD ELLEN AV DAVE LA CORDOVA ST HACE ST LANDMARK ST DIVISION ST CORNELIA ST HAWKINS LA LANG ST NEW SEWARD HWY READER RD READER RD 2018 UNDERGROUNDING PROJECT OLD SEWARD HWY O'MALLEY TO HUFFMAN OH to UG Conversion KLSS 412 and KLSS 812 PROJECT NUMBER: TBA PROJECT COST: $1,000,000 This safety improvement and capacity project will replace 0.9 miles of 336 ACSR three-phase overhead underbuild with a 750 kcmil underground circuit in duct. This is the second phase of the project to remove the distribution underbuild from the 34.5kV overhead to increase the structure strength capacity required to maintain compliance with the NESC. When these projects are completed the available ampacity of this circuit (RRSS 1132) can be uprated based on the additional sag clearance. For additional information concerning this project, please contact Shelly Schmitt at Air Land Transport Old Shop Concrete Forms Building Block Pland AS & G Headquarters LOW'S Alaska Club South Maintenance and Shop Facility A S & G Sales Value Liquor Angelus Memorial Park NIX C OLIVE LA Cellular One Sports Center Subway Sports Center Eagle Crest Independant Truck & Auto Main Office STG Shop Coshok's Canine Castle Building A OCEAN VIEW ELEMENTARY SCHOOL Building B U. S. Post Office Integraded Supply 8-PLEX APARTMENTS Tesoro 2- Go Wells Fargo Huffman Square Bldg B PETTIS RD W HUFFMAN RD T BOTANI C AL CIR DAILEY AVE DAILEY AV MARINER DR HUFFMAN RD CLIPPER SHIP CT O"MALLEY RD Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS E KLATT RD 2832 BRAYTON DR St. Johns United Methodist Church Alaska Baptist Convention AK Baptist Family Services Residential Cottage E 112TH AV OREN DR 2732 BRAYTON DR BOWMAN ELEMENTARY SCHOOL C I RCLEWO OD DR BRAYTON DR CHINOOK AV I LYN ST BRAN D RAINBOW AV MEANDE R DR ,800 3,600 5,400 7,200 1 inch = 1,083 feet Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2018 Old Seward Hwy O'Malley to Huffman.mxd Last Updated: 12/11/2014 WK

23 MC KENZIE DR FORREST RD 2019 UNDERGROUNDING PROJECT WISCONSIN STREET Northern Lights to 44th Avenue PROJECT NUMBER: TBA PROJECT COST:$1,500,000 SEPPALA DR 1526 W NORTHERN LIGHTS BLVD 1527 TURNAGAIN ELEMENTARY SCHOOL W 29TH AVE This project will retire 36 spans of overhead double-circuit primary conductor along the west side of Wisconsin Drive from Northern Lights Boulevard to W 44th Avenue. The northernmost 26 spans will be retired in addition to the poles, guy spans and guy wires. The southernmost 10 spans are underbuilt on 138 kv structures and will only have the conductor and any additional distribution facilities removed. These overhead facilities are located on Grids 1626 and 1726 and have a total distance of 5200 feet. Turnagain Substation is located on the east side of Wisconsin Drive on Grid 1627 and has four distribution feeders: Turnagain 112, 122, 132 and 142. All four feeders leave the substation as underground circuits and riser up to the pole structures on Wisconsin. Turnagain 112 and 122 go south as a double-circuit; and Turnagain 132 and 142 go north as a double-circuit. Double-circuit horizontal construction using one crossarm, as found on Wisconsin Street, creates working clearance problems and requires extra equipment and crew time whenever maintenance is needed. The majority of the poles supporting the 4/0 ACSR double-circuit overhead line do not meet the NESC grade C minimum strength requirements. Also, under an n-1 contingency, the Turnagain 132 circuit is undersized and not capable of picking up Woodland Park 242 under summer or winter peak loads without complex switching of the load. The total load provided by the Turnagain 122 tie with Spenard 212 is also approaching winter and summer capacity limits. Replacing the circuits with 750 kcmil would resolve both the NESC strength problem and contingency loading capacities. This is for reference and review purposes only of proposed Undergrounding Projects and is for official Chugach For additional information concerning this project, please contact Shelly Schmitt at W THIRTIETH AVE W THIRTY-FIRST AVE MILKY WAY DR LAKE HOOD ELEMENTARY SCHOOL CONSTELLATION AVE W THIRTY-SECOND AVE 1626 GRISSOM CIR ORION CIR W THIRTY-SIXTH AVE 1726 W FORTIETH AVE WISCONSIN ST FAITH CHRISTIAN COMMUNITY LAKESHORE DR 1826 Spenard Lake WILEY POST LP CROSSON DR W 30TH AVE W 31ST AVE Turnagain Substation W 32ND AVE MC RAE RD LAKESHORE MOTOR INN Lakeshore Tower Condos- A BALCHEN DR W 33RD AVE W 34TH AVE W 36TH AVE BENNETT AVE Chandler Inn BORLA ND DR MERRILL DR TURNAGAIN ST TURNAGAIN BLVD W FORTY-SECOND PL ,540 2,310 3,080 1 inch = 700 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2019 Wisconsin Street.mxd Last Updated: 10/29/2014 WK

24 KING ST JOHNS RD LANG ST CORDOVA ST A ST DALLAS ST OLIVE LA OLD SEWARD HWY GOOSE BERRY PL NEW SEWARD HWY LAKE OTIS RD LONG ST GOLOVIN ST DAKOTA ST ARLON ST ARLON ST LAKE OTIS RD LAKE OTIS PKWY 2019 UNDERGROUNDING PROJECT OLD SEWARD HWY DIMOND TO O'MALLEY OH to UG Conversion PROJECT NUMBER: TBA PROJECT COST: $1,700,000 This safety improvement project will replace 1.3 miles of the 336 ACSR three-phase overhead underbuild circuit with a 750 kcmil underground circuit in duct. This is the third phase of the project to remove the distribution underbuild from the 34.5kV overhead to increase the structure strength capacity required to maintain compliance with the NESC. When these projects are completed the available ampacity of this circuit (INSS 732) can be uprated based on the additional sag clearance. For additional information concerning this project, please contact Shelly Schmitt at W NINTY-SECOND AV SOUTH TOWN CENTER Home Depot Abbott DIMOND MALL Michaels Arts & Crafts Alaska Trade Center WALDEN POND CHARTER SCHOOL A.T. Publishing Carrs Quality Center AWWU OPERATIONS & MAINTENANCE K&W Interiors FERGUSONS 2430 NORCON Fairweather Inc. Holland Roofing house of critters Great Alaskan Holidays GENSCO Pacific Asphalt ASRC Galco Warehouse Bldg A BUILDERS CHOICE TRUSS PLANT Modular Plant PEPSI BUILDING C ST E EIGHTY-EIGHTH AV E NINETY-FIRST AV O"MALLEY RD KING CIR FAIRWEATHER ENVIRONMENT 2333 ABBOTT RD THIMB L E BERRY DR CREDIT UNION ONE Tikigaq Access Apartments Fred Meyers GRACE COMMUNITY CHURCH Commodore Park Senior Housing St. Johns United Methodist Church AS & G Headquarters Alaska Baptist Convention Independence Park Manor 1 0 1,150 2,300 LOW'S Alaska 4,600 Club South 6,900 Sprinkler/Utility Building 2633 Anchorage 9,200 Roofing Air Land Transport 1 inch = 1,375 feet Coordinate System: NAD83, State Plane, Alaska Zone 4, FIPS 5004 BRAYTON DR 2632 ACADEMY DR CEDRUS CT THUJA CIR THUJA AV V ANG UARD DR 2433 STURBRIDGE CIR 2533 COLONY LP RELIANCE DR ABBOTT RD VALLEY PARK DR RIVES CT OMALLEY RD Path: I:\Engineering\Planning Section\Undergrounding Projects\ Project Manual\2019 Old Seward Hwy Dimond to O'Malley.mxd Last Updated: 12/11/2014 WK