Director of Electricity and Gas Utilities State House ...€¦ · The second attachment, entitled "Emera Maine 2015 Chapter 330 Project Condition Detail", is a more detailed analysis

Faith Huntington Director of Electricity and Gas Utilities Maine Public Utilities Commission State House Station #18 Augusta, ME 04333-0018

PO Box 932 • Bangor, Maine 04402-0932

Ovemight Deliveries: 970 Illinois Ave. • Bangor, Maine 04401

Ph: (207) 945-5621 • emeramaine.com

Electronically filed April1, 2015

RE: Chapter 330 § B(A), Schedule of Rebuilding and Relocation of Transmission Lines - Emera Maine

Dear Ms. Huntington:

Pursuant to Chapter 330 of the Rules of the Maine Public Utilities Commission, Emera Maine hereby submits its schedule of transmission line rebuilding, relocation and construction projects for the next five years. This report includes the identification of all planned transmission projects 34.5kV or greater that change the electrical characteristics or rating of a portion of the transmission system. This includes all new construction or reconductoring of any transmission line. New transmission substations or additions to transmission substations that add line terminations or increase line rating are also included.

The report has three attachments. The first, entitled "Chapter 330 Projects", is a list of the 32 projects in this years' report broken down into the following categories: in service (six projects), under construction (six projects), planned (three projects), proposed (five projects), and conceptual (12 projects). For each of the 32 projects, we have provided details including estimated costs, an explanation of the need, the project characteristics, the solution, and general comments. As you will note in this report, the main driver of need for 17 of the 26 projects under construction, planned, proposed, or conceptual is the age and condition of the plant. Of the remaining nine projects, four are needed for reliability (projects that help prevent customer outages or provide redundancy), three are needed to support generator interconnection, and two are needed because of system loading or load growth.

The second attachment, entitled "Emera Maine 2015 Chapter 330 Project Condition Detail", is a more detailed analysis of the condition of the 12 conceptual projects, and 4 of the 5 proposed projects. The proposed project involving the Northem Maine Reliability Solution is not included in this report because it involves new construction.

The third attachment, entitled "Transmission Line Loading", is a loading report based on projected growth from the 2010 Transmission Needs Assessment Analysis.

There are a few points we'd like to highlight in this years' report. First, no projects were dropped off of last years' report, and no projects were cancelled or defunded.

1

Second, Bulk Electric System discussions are ongoing and could result in additional projects. If that occurs, or if projects are added or deleted for other reasons, we will provide an updated report.

Third, the report is a snapshot of the current order, status, and cost estimates for the various projects. As conditions evolve, the priority of projects may change, along with status and cost estimates. We will provide updates if any significant changes occur.

Fourth, as we discussed at our meeting with MPUC staff and the OPA on March 13, 2015, we are in the process of developing criteria to evaluate non-transmission alternatives (NTA) for each project. In prior reports and in the current report, we included a discussion of potential alternatives to the identified solution. In future reports, once we have developed and implemented our evaluation criteria, our goal is to provide more visibility over our NTA analysis for our various projects.

Finally, we call attention to the estimated costs for the Line 1176/3855 Rebuild Project (Number 22 on Attachment 1 ), and the Line 6901 Rebuild Project (Number 27 on Attachment 1 ). The cost estimates are based on normal de-energized construction. However, if a second 13BkV connection is not completed to resolve reliability needs, reconstruction would have to be conducted with the line engergized, or a new parallel line would be constructed. These options would increase the costs for reconstruction by 75 percent.

Please contact Kendra Overlock at (207) 973-2895 or me at (207)973-2847 if you have any questions about this filing.

TP:sm Enclosures

Very truly yours,

~~~ Timothy Pease Manager, Legal and Regulatory Affairs

2

STATE OF MAINE

COUNTY OF PENOBSCOT

) ) )

AFFIDAVIT

NOW, BEFORE ME, the undersigned authority, personally came and appeared, Gerard

R. Chasse, who first being duly sworn by me, did depose and say:

1. I am President and Chief Operating Officer of Emera Maine.

2. I have reviewed the Chapter 330 Report with the person(s) responsible for its

development and affirm that the utilities have not planned or made any improvements to the

transmission system with the intent of giving any existing or proposed generator preferential

treabnent nor with the intent of providing any ratepayer subsidy in terms of allocating the costs

of any such improvements between generators and rat ayers.

Subscribed and sworn to me this lst day of April, 2015.

Notary Public

KAREN A. BEll Notary Public • State of Maine

My Commission Expires July 6, 2019

Chapter 330 Projects

1. In Service: Keene Rd (KR) Transformer Addition2. In Service: L5 Reconductor to T9L3. In Service: L6908 Rbld Phase II4. In Service: L75 & BW3 Rebuild ROW Phase I5. In Service: L85 & L87 Rebuild, Chester to Lincoln6. In Service: MPRP - Orrington Cap Bank & 115kV Buyback7. Under Construction: 6908 Rbld Phase III8. Under Construction: Flo's Inn Transformer - Phase 29. Under Construction: Keene Rd. Expansion for Oakfield Wind Generator Interconnect10. Under Construction: L13/FR1 Rebuild11. Under Construction: Orrington Series Cap - Bingham Wind Generator Interconnect12. Under Construction: Passadumkeag Wind Generator Interconnect13. Planned: MDI Reliability Project - Transmission - New 34.5 kV Line14. Planned: MDI Reliability Project - Transmission - New BH Sub/Switching Station15. Planned: WaterWorks (WW) 46/12.5 Sub - Transmission work16. Proposed: L6913 (12-22) Rebuild17. Proposed: L75 & BW3 ROW Phase II18. Proposed: L8 Rebuild - Elm to Parkway So and Tibbets St Sub to Penobscot River19. Proposed: L89 Rbld - Medway Sub to E Millinocket Sub20. Proposed: Northern Maine Reliability Solution21. Conceptual: L1 Rebuild22. Conceptual: L1176/3855 Rebuild23. Conceptual: L2 Rebuild24. Conceptual: L20 Rebuild25. Conceptual: L25 Rebuild26. Conceptual: L50 Rebuild27. Conceptual: L6901 Rebuild28. Conceptual: L6910 Rebuild29. Conceptual: L73 Rebuild30. Conceptual: L74 Rebuild31. Conceptual: L80 Rebuild32. Conceptual: L84 Rebuild

ISO-NE Local System Plan Transmission Status Definitions

Status PTF Definition Local Definition(where different)

Estimated CostAccuracy

04/01/2015

In Service The project has been placed in operation. -- -Under Construction The project has received necessary approvals and a significant level

of engineering or construction is underway.-- +/-10%

Planned The project has I.3.9 approval (if required), but may or may nothave received TCA approval. Generators planned withInterconnection Agreements filed.

The project has been approved in the budget. +/-25%

Proposed A Significant degree of analysis is available to show potential needfor the project, but I.3.9 has not been received yet. ISO has beenprovided the analysis.

-- -25%, +50%

Conceptual There is little or no analysis available to support a specific project,but there is sufficient information to suggest a pending need forfuture study work and a remedial project.

-- -50%, +200%

Cancelled Project has been cancelled. -- --Deferred -- -- --

ATTACHMENT 1

Chapter 330 Data - Keene Rd (KR) Transformer Addition

Project: Keene Rd (KR) Transformer AdditionProject Type: SubstationPTF: No

Status: In ServiceProject Timing: 2014 - 2015Cost (Actual): $3,463,572

Reason for Need:Line 63 is a 115kV line feeding the Northern Division from Keene Rd to Chester Substation. This project would allow thedivision to be fed following an outage of line 63. It will also mitigate an overload on one of the two Chester 115kV/46kVtransformers following a contingency.

Regulatory Activity:

Characteristics:· Line Identification: KR Sub· Location: Chester· Line Length: 0.4 mi· Peak Load: 42MVA· Voltage Level: 46kV

Solution:· New Structure/Material/Design: Single wood pole HLP· New Conductor: 795ACSR· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Minor impact to existing small hydro generating units at Medway and W. Enfield, allowing them to stayon line following a contingency.

· Potential Alternatives:Alternative would be building a new 115kV line parallel to Line 63 and also ensuring the dieselgenerators at Medway are licensed and able to run when needed.

Comments:2014 reported estimate $3,200,000

Page 1 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L5 Reconductor to T9L

Project: L5 Reconductor to T9LProject Type: Rebuild/ReratePTF: No

Status: In ServiceProject Timing: 2014 - 2015Cost (Actual): $192,705

Reason for Need:The existing section of 46kv Line 5 that ties transformer T9 with the lower sub at Graham Substation needs to be upgraded tomatch the ampacity of the transformer. The existing line is overloaded during contingency operation with one of the otherGraham Substation transformers out of service.


Characteristics:· Line Identification: GS Sub· Location: Veazie· Line Length: .25 Miles· Peak Load: 90MVA· Voltage Level: 46kV

Solution:· New Structure/Material/Design: Single wood pole with 8' arms· New Conductor: 1192 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:

None· Potential Alternatives:

Comments:2014 reported estimate $200,000

Page 2 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L6908 Rbld Phase II

Project: L6908 Rbld Phase IIProject Type: Rebuild/ReratePTF: No

Status: In ServiceProject Timing: 2014Cost (Actual): $3,930,905

Reason for Need:Age and condition, thermal ratings limited due to sag. Poles are near end of life.

Regulatory Activity:MPUC Docket 2014-00146

Characteristics:· Line Identification: 6908· Location: From New Sweden north to Sullivan Road· Line Length: Ph II - 10.4 miles· Peak Load: 10 MVA· Voltage Level: 69kV

Solution:· New Structure/Material/Design: Wood H-Frame, Steel Arms, Static Wires· New Conductor: 795 ACSR Drake· Impact on Existing/Proposed Generators? No· Description of the Impact:


Upgrade to 138 kV

Comments:2014 reported cost estimate: $4,000,000

Page 3 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L75 & BW3 Rebuild ROW Phase I

Project: L75 & BW3 Rebuild ROW Phase IProject Type: Rebuild/ReratePTF: No

Status: In ServiceProject Timing: 2014Cost (Actual): $234,590

Reason for Need:Replace aging and substandard plant discovered during recent inspections.


Characteristics:· Line Identification: Line 75· Location: Bangor· Line Length: 10 spans· Peak Load: 15 MVA· Voltage Level: 46kV

Solution:· New Structure/Material/Design: Single wood pole with 8' arms· New Conductor: 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer project and accept risk.

Comments:2014 reported estimate direct cost of $201,464. The original estimate did not include overheads (OH) and the actual cost reportedabove does include OH. Direct cost for this project (for comparison to estimate) was $234,590.

Page 4 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L85 & L87 Rebuild, Chester to Lincoln

Project: L85 & L87 Rebuild, Chester to LincolnProject Type: Rebuild/ReratePTF: No

Status: In ServiceProject Timing: 2014Cost (Actual): $3,225,139

Reason for Need:Line 87 transmission line overload with loss of line 85. Pole condition is also an issue on both Line 85 & 87, along with separationfrom line 85 in locations.


Characteristics:· Line Identification: Line 85 & Line 87· Location: Chester to Lincoln· Line Length: 1.8 miles· Peak Load: 21.7MVA· Voltage Level: 46kV

Solution:· New Structure/Material/Design: Single wood & composite poles with 8' arms· New Conductor: 559 AAAC, 556 AAC· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Minor impact to existing hydro generation at W.Enfield.· Potential Alternatives:

Build additional 46kV line from Chester to Lincoln

Comments:2014 reported estimate was "TBD" and our internal, approved estimate was $3,100,000

Page 5 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - MPRP - Orrington Cap Bank & 115kV Buyback

Project: MPRP - Orrington Cap Bank & 115kV BuybackProject Type: SubstationPTF: Yes

Status: In ServiceProject Timing: 2014 - 2015Cost (Actual): $11,100,000

Reason for Need:Termination equipment for CMP's 115kV line (MPRP project). Breakers and 115kV line terminal have already been installed. Miscellaneous work to terminate the new line in 2015. Project includes Emera Maine purchase of 115 kV Lines in Orrington.Capacitor Bank has been in service since 2012.

Regulatory Activity:CMP CPCN MPUC Docket 2008-00255

Characteristics:· Line Identification: ORR Sub· Location: Orrington· Line Length: -· Peak Load: -· Voltage Level: 115kV

Solution:· New Structure/Material/Design: Wood H frame· New Conductor: 2 conductor bundle 795 ACSR· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

New 115kV line south of Orrington could allow improvements to all generators in Emera Maine territoryby providing an additional path to export.

· Potential Alternatives:N/A

Comments:MPUC approved transaction for the line purchase, which is based on costs for CMP to construct the line.

Page 6 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - 6908 Rbld Phase III

Project: 6908 Rbld Phase IIIProject Type: Rebuild/ReratePTF: No

Status: Under ConstructionProject Timing: 2014 - 2016Cost (Approved Estimate): $8,670,000

Reason for Need:Age and condition, thermal ratings limited due to sag. These poles are near end of life per inspection.


Characteristics:· Line Identification: 6908· Location: Sullivan Road to Fish River Switching Station.· Line Length: 20.6 miles· Peak Load: 10 MVA· Voltage Level: 69kV· Year Constructed: 1950· Existing Structure/Material/Design: Wood Pole H-Frame· Existing Conductor: 2/0 F Copperweld

Solution:· New Structure/Material/Design: H-Frame Wood, Steel Arms and Shield Wires· New Conductor: 795 ACSR Drake· Impact on Existing/Proposed Generators? No· Description of the Impact:

No generators in the area.· Potential Alternatives:

138 kV Line

Comments:Construction commenced in November, 2014 and is projected to be completed by Q1, 2016.

Page 7 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - Flo's Inn Transformer - Phase 2

Project: Flo's Inn Transformer - Phase 2Project Type: SubstationPTF: No


Reason for Need:The Flo's Inn Back-Up Transformer will improve system reliability in Northern Maine by procuring and installing a new, back-uptransformer at Flo's Inn Substation in Presque Isle, Maine. This transformer mitigates risk by enabling Emera Maine NorthernOperating District to continue to support the Northern Maine electrical system should the existing transformer fail at either EmeraFlo's Inn sub or Algonquin Tinker sub in New Brunswick. The transformer purchase spend of $2,627,510 occurred in 2013-14and substation installation will occur in 2014-2015.


Characteristics:· Line Identification: Flo's Inn Sub· Location: Presque Isle· Line Length: -· Peak Load: 90MVA· Voltage Level: 138kV· Year Constructed: 1979· Existing Structure/Material/Design:· Existing Conductor:

Solution:· New Structure/Material/Design:· New Conductor:· Impact on Existing/Proposed Generators? No· Description of the Impact:

Does not impact generators due to remaining thermal limits on 6901 line and others.· Potential Alternatives:

Comments:2014 reported estimate $3,000,000 for Phase II. Cost escalation due to higher than estimated construction costs.

Page 8 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - Keene Rd. Expansion for Oakfield Wind Generator Interconnect

Project: Keene Rd. Expansion for Oakfield Wind Generator InterconnectProject Type: SubstationPTF: No

Status: Under ConstructionProject Timing: 2014 - 2015Cost (Approved Estimate): $0

Reason for Need:To accommodate the 115kV line interconnecting the new Oakfield Wind project. Emera Maine's portion of the project is toexpand the 345kV bus and interconnect the project with a new 345kV breaker.


Characteristics:· Line Identification: KR Sub· Location: Chester· Line Length: -· Peak Load: 150MVA· Voltage Level: 345kV· Year Constructed: -· Existing Structure/Material/Design: -· Existing Conductor: -

Solution:· New Structure/Material/Design:· New Conductor: -· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Dedicated feed to the new Oakfield generator. All costs paid by the generator.· Potential Alternatives:

N/A

Comments:

Page 9 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L13/FR1 Rebuild

Project: L13/FR1 RebuildProject Type: Rebuild/ReratePTF: No


Reason for Need:Rebuild of Line 13 and underlying distribution circuits due to age and condition. By installing covered distribution conductor, thisproject will also help mitigate damage from overbuild contacts. Construction planned in 3 phases: 4 miles/4 miles/3 miles


Characteristics:· Line Identification: Line 13· Location: Hancock to East Franklin Substations· Line Length: 11.5 miles· Peak Load: 12.3MVA· Voltage Level: 34.5kV· Year Constructed: 1926, rebuilt in 1950s· Existing Structure/Material/Design: Single wood pole· Existing Conductor: #6CU, 3/0 ACSR, 4/0 ACSR

Solution:· New Structure/Material/Design: Single wood poles with 8' arms· New Conductor: 336 AAC· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer and accept risk.

Comments:In 2015, Emera Maine completed the rebuild of 5.5 miles of Line 13 and plans to complete an additional 2.5 miles. The remaining3.5 miles of rebuild is in the engineering/planning phase and may be completed in late 2015 or in 2016. Average cost per mile for34.5 kV overbuild with a combination of roadside and ROW for this project is $550,000 per mile.

Page 10 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - Orrington Series Cap - Bingham Wind Generator Interconnect

Project: Orrington Series Cap - Bingham Wind Generator InterconnectProject Type: SubstationPTF: Yes


Reason for Need:Wind Project system upgrade. Series Capacitor installation required as part of the Bingham Wind Project in CMP's serviceterritory per ISO's System Impact Study.


Characteristics:· Line Identification: OR Sub· Location: Orrington· Line Length: -· Peak Load: 1200MVA· Voltage Level: 345kV· Year Constructed:· Existing Structure/Material/Design:· Existing Conductor:

Solution:· New Structure/Material/Design:· New Conductor:· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Compensating the 345kV lines south of Orrington could possibly allow improvements to all generators inEmera Maine territory by increasing the transfer capability. All costs paid by the generator.

· Potential Alternatives:N/A

Comments:

Page 11 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - Passadumkeag Wind Generator Interconnect

Project: Passadumkeag Wind Generator InterconnectProject Type: BuildPTF: No


Reason for Need:Work necessary to interconnect new 115kV Substation to Line 64 to accommodate new 39.8MW Wind Generation. Distributionline rebuild also needed to accommodate wind collection lines.


Characteristics:· Line Identification: -· Location: Passadumkeag· Line Length: -· Peak Load: 40MVA· Voltage Level: 115kV· Year Constructed:· Existing Structure/Material/Design:· Existing Conductor:

Solution:· New Structure/Material/Design:· New Conductor:· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Dedicated feed to the new Passadumkeag generator. All costs paid by the generator.· Potential Alternatives:

N/A

Comments:

Page 12 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - MDI Reliability Project - Transmission - New 34.5 kV Line

Project: MDI Reliability Project - Transmission - New 34.5 kV LineProject Type: BuildPTF: No

Status: PlannedProject Timing: 2015 - 2017Cost (Estimate): $4,500,000***

Reason for Need:A second transmission feed to Bar Harbor is required to improve reliability and serve load growth.

Regulatory Activity:MPUC Docket 2014-00137 Ten Person Complaint

Characteristics:· Line Identification: Line 34· Location: Bar Harbor· Line Length: 8.9 Miles· Peak Load: 18.9MVA· Voltage Level: 34.5kV· Year Constructed:· Existing Structure/Material/Design: n/a· Existing Conductor: n/a

Solution:· New Structure/Material/Design: Single wood pole with spacer cable over 8' arm· New Conductor: 795 AAC 35 kV covered· Impact on Existing/Proposed Generators? No· Description of the Impact:

none· Potential Alternatives:

Upgrade the existing Line 22 feeding Bar Harbor energized without building a second feed.

Comments:Cost estimate based on recommended Rte 3 route using bundled spacer conductor 34.5 kV overbuild. Ongoing discussions withstakeholders are occuring before line design is finalized.

Page 13 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - MDI Reliability Project - Transmission - New BH Sub/Switching Station

Project: MDI Reliability Project - Transmission - New BH Sub/Switching StationProject Type: SubstationPTF: No


Reason for Need:Replacing aging and overloaded distribution substation

Regulatory Activity:MPUC Docket 2014-00141 Ten Person Complaint

Characteristics:· Line Identification: AA Sub· Location: Bar Harbor· Line Length: -· Peak Load: 14.6MVA· Voltage Level: 34.5kV· Year Constructed:· Existing Structure/Material/Design:· Existing Conductor:

Solution:· New Structure/Material/Design:· New Conductor:· Impact on Existing/Proposed Generators? No· Description of the Impact:


3 alternative locations under consideration, open-air substation design originally considered

Comments:Current cost estimate is based on use of compact, Gas Insulated Switchgear technology to meet location-specific requirementsunique to MDI/Bar Harbor. Continuing to work with stakeholder advisory group on location and design specifics.

Page 14 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - WaterWorks (WW) 46/12.5 Sub - Transmission work

Project: WaterWorks (WW) 46/12.5 Sub - Transmission workProject Type: BuildPTF: No


Reason for Need:Project to replace existing Waterworks sub to 46/12.5kV to provide needed capacity for current loads during contingencies and tosupport customer projected 6 MVA load growth in 2016. Project scope also includes new two-mile 46 kV T line from GrahamStation in Veazie.


Characteristics:· Line Identification: Line 41· Location: Bangor· Line Length: 2 Miles· Peak Load: 11MVA· Voltage Level: 46kV· Year Constructed: This is new construction· Existing Structure/Material/Design:· Existing Conductor: N/A

Solution:· New Structure/Material/Design: Single wood poles spacer over 8' arm· New Conductor: 556 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


see comments

Comments:***The costs of this project will be shared with Eastern Maine Medical Center, which is constructing a large addition to itscampus.

Alternatives considered: (1)Upgrade existing East side substations: Graham Station, Hogan Road and Broadway Subs(2) EMMC splitting their campus load between two subs: BW & GS to avoid system upgrades(3) 46kV Transmission to EMMC(4) Replacement of Water Works Substation with a new 46kv transmission source from GS

Page 15 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L6913 (12-22) Rebuild

Project: L6913 (12-22) RebuildProject Type: Rebuild/ReratePTF: No

Status: ProposedProject Timing: 2016Cost (Estimate): $486,000***

Reason for Need:Age and insufficient clearances to meet NESC.


Characteristics:· Line Identification: 12-22 (6913)· Location: Mapleton· Line Length: 0.81 miles· Peak Load: 8 MVA· Voltage Level: 69kV· Year Constructed: 1963· Existing Structure/Material/Design: Wood, Single Pole and Crossarm, Post Insulators, Dist. U/B· Existing Conductor: 336.4 ACSR Transmission, #2 ACSR Distrib

Solution:· New Structure/Material/Design: Wood, Single Pole and horizontal Post Insulators, Dist. U/B· New Conductor: 336.4 ACSR Drake Trans., and 336.4 AAC D· Impact on Existing/Proposed Generators? No· Description of the Impact:

None without a complete line rebuild.· Potential Alternatives:

138 kV Line

Comments:***Cost estimate is based on a full rebuild using an average 69 kV line construction cost of $600,000 per mile based on 2015recent line construction projects and cost analysis. These estimates are subject to change based on project timing, market costs,engineering design, internal vs. external construction, and other factors, for the to-be-determined project solution.

Page 16 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L75 & BW3 ROW Phase II

Project: L75 & BW3 ROW Phase IIProject Type: Rebuild/ReratePTF: No

Status: ProposedProject Timing: 2016Cost (Estimate): $325,000***

Reason for Need:Rebuild to address age and condition of plant (both in ROW and that which spans I-95) and upgrade the conductor to match theremainder of the line.


Characteristics:· Line Identification: Line 75· Location: Bangor· Line Length: 0.46 miles· Peak Load: 15MVA· Voltage Level: 46kV· Year Constructed: 1950s· Existing Structure/Material/Design: Single wood Pole w/Horizontal Wood Crossarm· Existing Conductor: 3/0 ACSR

Solution:· New Structure/Material/Design: Single wood poles with 8' arm· New Conductor: 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer and accept risk.

Comments:***Cost estimate is based on cost of Phase I of the line 75 rebuild.

Page 17 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L8 Rebuild - Elm to Parkway So and Tibbets St Sub to Penobscot River

Project: L8 Rebuild - Elm to Parkway So and Tibbets St Sub to Penobscot RiverProject Type: Rebuild/ReratePTF: No

Status: ProposedProject Timing: 2015 - 2016Cost (Estimate): $750,000***

Reason for Need:Line condition and required Line 8 rating increase due to overload during Line 9 outage identified in the transmission systemstudy. Increased separation from Line 9 or relocation to roadside also required for working clearance and reliability.The section toward the river from Tibbets St. Sub also requires new larger conductors due to overload during contingency.


Characteristics:· Line Identification: Line 8· Location: Brewer· Line Length: 1.53 miles· Peak Load: 39.8 MVA· Voltage Level: 46kV· Year Constructed: 1953, 1980's· Existing Structure/Material/Design: Wood Single Pole w/Horizontal Wood Crossarm· Existing Conductor: 266 ACSR, 336 AAC 46kV, 795 AAC, 556 AAC

Solution:· New Structure/Material/Design: Wood Single Pole with FG Crossarm· New Conductor: 795 AAC· Impact on Existing/Proposed Generators? No· Description of the Impact:


Rebuild in place with substandard separation from Line 9 which limits working clearance and reliability.

Comments:Cost estimate is based on a full rebuild using an average 46 kV line construction cost of $500,000 per mile based on 2015 recentline construction projects and cost analysis. These estimates are subject to change based on project timing, market costs,engineering design, internal vs. external construction, and other factors, for the to-be-determined project solution.

Page 18 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L89 Rbld - Medway Sub to E Millinocket Sub

Project: L89 Rbld - Medway Sub to E Millinocket SubProject Type: Rebuild/ReratePTF: No

Status: ProposedProject Timing: 2016 - 2017Cost (Estimate): $750,000***

Reason for Need:Poles - Many of the older poles from the 1950's have decay and other condition issues associated with age. The existing polesalso lack proper strength for new conductors.Conductor - Existing sub-standard No 2 Cu conductor installed in the 1930's has an increasing risk of failure due to condition. New larger conductors are necessary to support voltage & load.This project completes the five part rebuild of Line 89 from Medway to Millinocket started in the 1990's.


Characteristics:· Line Identification: Line 89· Location: Medway to East Millinocket· Line Length: 1.6 miles· Peak Load: 9.2MVA· Voltage Level: 46kV· Year Constructed: Conductor 1930's, Poles 1950's & 1970's· Existing Structure/Material/Design: Single Wood Pole w/Horizontal Wood Crossarms· Existing Conductor: No 2 Copper

Solution:· New Structure/Material/Design: Single Wood Pole w/Horizontal Fiberglass Crossarm· New Conductor: 559 AAC· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer and Increase risk & rate of failures


Page 19 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - Northern Maine Reliability Solution

Project: Northern Maine Reliability SolutionProject Type: BuildPTF: No

Status: ProposedProject Timing: 2014 - 2018Cost (Estimate): $17,400,000***

Reason for Need:Reliability need for the project is fully described in the Report titled "Transmissions System Reliability Investigation--EmeraMaine Reliability Solutions Study Report" prepared by RLC Engineering and filed on March 31, 2014 in MPUC Docket 2014-00048 Petition for a Certificate of Public Convenience and Necesssity. Includes a new Transmission Line and Substation.


Characteristics:· Line Identification: TBD· Location: Monticello, Maine to Woodstock, NB· Line Length: 4.2 Miles· Peak Load: 40 MVA· Voltage Level: 138kV· Year Constructed: N/A· Existing Structure/Material/Design: TBD· Existing Conductor: N/A

Solution:· New Structure/Material/Design:· New Conductor: 795 ACSR· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

May provide additional export capacity for northern Maine generators.· Potential Alternatives:

A thorough alternatives analysis was conducted including study of the following options: strengthenedNB connections, new ISO-NE connection, and new in-region generation. The new NB connection solvesall reliability needs (including BES compliance) and is the lowest cost to customers.

Comments:***Estimate is the cost for work in the U.S.

Page 20 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L1 Rebuild

Project: L1 RebuildProject Type: Rebuild/ReratePTF: No

Status: ConceptualProject Timing: 2017 - 2019Cost (Estimate): $11,250,000***

Reason for Need:Age & condition of poles and conductor. Many of the poles in ROW are pre-1970 with ground line decay and other age relatedissues. Some sections have significant access limitations which often delays restoration and maintenance.


Characteristics:· Line Identification: Line 1· Location: Veazie to Ellsworth· Line Length: 23.4 Miles· Peak Load: 13.3· Voltage Level: 46kV· Year Constructed: Originally constructed in 1909· Existing Structure/Material/Design: Single Wood Pole w/Horizontal Wood Crossarms· Existing Conductor: Majority 4/0 ACSR with shorter lengths o

Solution:· New Structure/Material/Design: Single Wood Pole w/Horizontal Fiberglass Crossarm & HLP Insulators· New Conductor: 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer and allow increased rate of failure and increased maintenance costs


Page 21 of 3204/01/2015

ATTACHMENT 1

Chapter 330 Data - L1176/3855 Rebuild

Project: L1176/3855 RebuildProject Type: Rebuild/ReratePTF: No

Status: ConceptualProject Timing: 2019 - 2020Cost (Estimate): $***

Reason for Need:Pole age and condition, substandard clearances and thermal limits. Requires coordination with NB. 56% of poles show some signsof internal decay.


Characteristics:· Line Identification: 1176 (3855)· Location: Flo's Inn substation in Presque Isle to NB Border.· Line Length: 11.89 miles· Peak Load: 57MVA· Voltage Level: 138kV· Year Constructed: 1957· Existing Structure/Material/Design: H-frame wood· Existing Conductor: 266.8 ACSR Partridge

Solution:· New Structure/Material/Design: H-Frame, Wood Poles, Steel Arms.· New Conductor: 795 ACSR Drake· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

May increasee ATC and TTC ratings to NBP. May impact all generators with export. May provideadditional capacity for Northern Maine generators.

· Potential Alternatives:An additional 138 or 345 kV Line to NBP or ISO-NE.

Comments:***Under the assumption of normal de-energized reconstruction, the estimated cost is $8,000,000.

If a second 138 kV connection is not completed to resolve reliability needs, reconstruction would have to be conducted with theline energized, or a new parallel line would be constructed. The cost range for these two options is $13,000,000 to $14,000,000.

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ATTACHMENT 1




Reason for Need:For Contingency with Line 57 out, Line 2 needs to be rebuilt with larger conductor to increase capacity and reduce voltage drop. Poles installed in the 1960's in the ROW section need to be replaced due to condition.


Characteristics:· Line Identification: Line 2· Location: Ellsworth to Trenton· Line Length: 8.7 Miles· Peak Load: 21.1 MVA· Voltage Level: 34.5kV· Year Constructed: Last major reconstruction 1960's· Existing Structure/Material/Design: Single Wood Pole w/Horizontal Wood Crossarms· Existing Conductor: Majority 266 ACSR w/various other shorte

Solution:· New Structure/Material/Design: Single Wood Pole w/Horizontal Fiberglass Crossarms· New Conductor: 795 AAC & 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


Evaluate piecemeal replacments due to condition, along with alternative solution to voltage drop duringcontingency.


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Reason for Need:Poor condition of the poles and copper conductors installed in 1929. Work will be coordinated with MDOT road reconstruction insome sections.


Characteristics:· Line Identification: Line 20· Location: East Machias to Edmonds· Line Length: 24.3 Miles· Peak Load: 6.2 MVA· Voltage Level: 34.5kV· Year Constructed: Conductor 1920's, Older poles from 1950s· Existing Structure/Material/Design: Single Wood Pole w/Horizontal Wood Crossarms· Existing Conductor: Majority No 4 Copper with 336 AAC, #2 AC

Solution:· New Structure/Material/Design: Wood Single Pole w/Horizontal Fiberglass Crossarms· New Conductor: 795 ACSR & 556 35kV AAC· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer and Increase risk & rate of failures with increased maintenance costs.


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Reason for Need:Driven by the failures beyond 2508 on #2 ACSR conductor (~2mi). Also ~2mi of #4 Cu conductor from 1920's. Relocation ofL25 tap to Rt 187 would reduce exposure on both transmission & distribution. Removal of customers on the 35kv circuit willimprove operation & safety.


Characteristics:· Line Identification: Line 25· Location: Columbia Falls to Jonesport· Line Length: 14.1 Miles· Peak Load: 2.9 MVA· Voltage Level: 34.5kV· Year Constructed: Conductor dates from 1920's, Last major· Existing Structure/Material/Design: Single Wood Pole with Wood Crossarms· Existing Conductor: No4 Copper, No 2 ACSR, 1/0 AAAC

Solution:· New Structure/Material/Design: Single Wood Pole with FG Crossarm· New Conductor: 336 AAC 35kv· Impact on Existing/Proposed Generators? No· Description of the Impact:


Defer and allow increased rate of failure and increased maintenance costs


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Reason for Need:Replace 1957 poles due to condition. Existing conductors need to be upgraded to support voltage and load growth. Someadditional pole replacements will be required to provide height and strength for the new conductors.


Characteristics:· Line Identification: Line 50· Location: Bangor to Corinth· Line Length: 15.4 Miles· Peak Load: 13.5 MVA· Voltage Level: 46kV· Year Constructed: 1957· Existing Structure/Material/Design: Single Wood Pole with Wood K-Frame Crossarms· Existing Conductor: Majority 3/0 ACSR with short length of 7

Solution:· New Structure/Material/Design: Single Wood Pole with HLP Insulators· New Conductor: 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


Requires alternatives analysis, including but not limited to: full rebuild, spot repairs (piecemealapproach), non-transmission alternative, or a hybrid solution.

Comments:Potential solutions to meet this project need will be evaluated in conjunction with Lines 73 & 74.

***Cost estimate is based on a full rebuild using an average 46 kV line construction cost of $500,000 per mile based on 2015recent line construction projects and cost analysis. These estimates are subject to change based on project timing, market costs,engineering design, internal vs. external construction, and other factors, for the to-be-determined project solution.

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Status: ConceptualProject Timing: 2019 - 2020Cost (Estimate): $***

Reason for Need:Age and Condition, sag limited for thermal ratings, major limiting factor for N-1 planning criteria, spar arms are in poor condition.(Emera Maine completed spot replacements for critical spar arms in 2014 to defer full rebuild.) Requires coordination with NBPower


Characteristics:· Line Identification: 6901· Location: Structure 22 to Canadian Border· Line Length: 8.97 Miles· Peak Load: 40 MVA· Voltage Level: 69kV· Year Constructed: 1964· Existing Structure/Material/Design: Wood Pole H-Frame Structures· Existing Conductor: 336.4 ACSR Linnet

Solution:· New Structure/Material/Design: H-Frame, Wood Pole, Steel Arms· New Conductor: 795 ACSR Drake· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Impacts all Generators with export. May increase thermal limits on 6901, but there are other thermallimitings remaining in Canada at Tinker. May provide additional export capacity for Northern MaineGenerators.

· Potential Alternatives:

Comments:***Under the assumption of normal de-energized reconstruction, the estimated cost is $6,000,000.

If a second 138 kV connection is not completed to resolve reliability needs, reconstruction would have to be conducted with theline energized, or a new parallel line would be constructed. The cost range for these two options is $10,000,000 to $11,000,000.

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Reason for Need:Age and Condition, sag limited for thermal ratings, limiting factor for N-1 planning contigencies. 52% of poles are showing somesigns of internal decay.


Characteristics:· Line Identification: 6910· Location: Bridgewater to Mullen· Line Length: 19.4 miles· Peak Load: 16 MVA· Voltage Level: 69kV· Year Constructed: 1952· Existing Structure/Material/Design: Wood Pole H Frame Structures· Existing Conductor: 2/0 Copperweld

Solution:· New Structure/Material/Design: H-Frame, Wood Pole, Steel Arms· New Conductor: 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:

May reduce numbers of hours of generator operational limits to avoid thermal overload limits on 6910.· Potential Alternatives:

138 kV line to Flo's Inn.

Comments:***Cost estimate is based on a full rebuild using an average construction cost for 69 kV lines of $600,000 per mile based on 2015recent line construction projects and/or project cost analysis. These estimates are subject to change based on project timing, marketcosts, engineering design, internal vs. external construction, and other factors, for the to-be-determined project solution.

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Reason for Need:Poor condition of older poles not previously replaced during smaller projects. The transmission study shows that this line needslarger conductors to continue to provide backup to Broadway Sub.


Characteristics:· Line Identification: Line 73· Location: Bangor· Line Length: 3.9 Miles· Peak Load: 23.6 MVA· Voltage Level: 46kV· Year Constructed: 1957· Existing Structure/Material/Design: Single Wood Pole w/Horizontal Wood Crossarms· Existing Conductor: Majority 266 with some 3/0 ACSR





***Cost estimate is based on a full rebuild using an average 46 kV line construction cost of $500,000 per mile based on 2015recent line construction projects and cost analysis. These estimates are subject to change based on project timing, market costs,engineering design, internal vs. external construction, and other factors, for the to-be-determined project solution.

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Reason for Need:Increasing rate of ground line decay on 1960's wood poles. Re-establish backup for East Corinth Sub. Enable Line 50 Rebuild.


Characteristics:· Line Identification: Line 74· Location: Corinth to Milo· Line Length: 17.7 Miles· Peak Load: 10.4 MVA· Voltage Level: 46kV· Year Constructed: 1964· Existing Structure/Material/Design: Single Wood Pole with Wood K-Frame Crossarms· Existing Conductor: 266 ACSR





***Cost estimate is based on a full rebuild using an average 46 kV line construction cost of $500,000 per mile based on 2015recent line construction projects and cost analysis. These estimates are subject to change based on project timing, market costs,engineering design, internal vs external construction, and other factors, for the to-be-determined project solution.

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Reason for Need:Safety - Much of the pole line doesn't meet current working clearance standards. Possible NESC clearance violations on a portionof existing poles.Poles - Majority of poles near end of life condition, increasing ground line decay and pole top issues.Conductor - Non-standard older ACSR conductor doesn't support some contingencies due to voltage drop, subject to aboveaverage incidence of damage from trees along narrow row & river bank sections.


Characteristics:· Line Identification: Line 80· Location: Milford to Stanford Substations· Line Length: 23.3 miles· Peak Load: 8.8 MVA· Voltage Level: 46kV· Year Constructed: 1950s· Existing Structure/Material/Design: Single Wood Pole w/Horizontal Wood Crossarms· Existing Conductor: Majority 266 ACSR with 4/0 ACSR & 336 AA

Solution:· New Structure/Material/Design: Single Wood Pole w/Horizontal Fiberglass Crossarms· New Conductor: 795 AAC· Impact on Existing/Proposed Generators? Yes· Description of the Impact:

Minor impact to existing hydro generation at W.Enfield and Milford.· Potential Alternatives:

Defer and increase risk of failures


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Reason for Need:Safety - Substandard strength & working clearance due to size and condition of poles.Poles - Many of the poles both roadside and in row have decay.Conductors - No2 & 1/0 Cu conductors that date from 1930 no longer provide contingency backup for Line 86 as shown in thetransmission study.Upgrade of Line 84 is necessary before Line 86 can be taken out of service for rebuilding.


Characteristics:· Line Identification: Line 84· Location: Chester to Medway· Line Length: 25.42 Miles· Peak Load: 8 MVA· Voltage Level: 46kV· Year Constructed: Last major rebuild in 1950's· Existing Structure/Material/Design: Wood Single Pole w/Horizontal Wood Crossarms· Existing Conductor: Majority 1/0 & No. 2 Copper

Solution:· New Structure/Material/Design: Single Wood Pole w/Horizontal Fiberglass Crossarm & HLP Insulators· New Conductor: 795 AAC & 795 ACSR· Impact on Existing/Proposed Generators? No· Description of the Impact:


Run the line to failure with reduced operating options by keeping the existing line rating.


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ATTACHMENT 1

ROW (Miles)

Road

side (Miles)

Total (Miles)

Type Length (Miles)

Qty ROW Poles

Avg Age

ROW Poles

Qty Road

side Poles

Avg Age

Road

side Poles

Qty Poles Inspected

Qty w/Internal Decay

% In

ternal Decay

Qty w/External Decay

% External Decay

Quan

tity Rejected

Percent Rejected

336 ACSR 0.81 0 N/a 36 1972 less than 1950 0 0 0 0

1950‐1959 20 16 80% 6 30% 1 5%

1960‐1969 0 0 0 0

1970‐1979 0 0 0 0

1980‐1989 11 5 45% 0 0% 0 0%

1990‐1999 3 0 0% 0 0% 0 0%

2000‐2009 2 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Total 36 21 58% 6 17% 1 3%

3/0 ACSR 0.46 16 1957 0 N/a less than 1950 0 0 0 0

1950‐1959 13 6 46% 8 62% 0 0%

1960‐1969 2 2 100% 0 0% 0 0%

1970‐1979 0 0 0 0

1980‐1989 0 0 0 0

1990‐1999 0 0 0 0

2000‐2009 0 0 0 0

2010 and newer 0 0 0 0

Total Poles 15 8 53% 8 53% 0 0%

556 AAC 15KV 0.11 34 1990 7 1998 less than 1950 0 0 0 0

336 AAC 15KV 0.38 1950‐1959 5 0 0% 0 0% 0 0%

795 AAC 0.40 1960‐1969 17 1 6% 0 0% 1 6%

266 ACSR 0.64 1970‐1979 2 0 0% 0 0% 0 0%

1980‐1989 3 0 0% 0 0% 0 0%

1990‐1999 3 0 0% 0 0% 0 0%

2000‐2009 0 0 0 0

2010 and newer 0 0 0 0

Totals 30 1 3% 0 0% 1 3%

#2 CU 1.60 44 1983 0 N/a less than 1950 0 0 0 0

1950‐1959 12 6 50% 2 17% 0 0%

1960‐1969 4 1 25% 1 25% 0 0%

1970‐1979 10 2 20% 1 10% 0 0%

1980‐1989 2 0 0% 0 0% 0 0%

1990‐1999 2 1 50% 0 0% 0 0%

2000‐2009 1 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Totals 31 10 32% 4 13% 0 0%

8

75

18 SOR 46 Elm Street Penobscot River 1953 Single Wood

Pole

w/Horizontal

Wood

Crossarm

34 Conductor

1.60 0.00 1.60

0.46 0.00 0.46

1.45 0.08 1.53

0.00 0.81 0.81 NESC violations due to insufficient

clearances

Phase 1 rebuild project completed in

2014 to replace string of 1950s poles in

ROW with insufficient shell

thickness/strength

Emera Maine 2015 Chapter 330 Project Condition Detail

Comments

1963 H‐Frame Wood

Poles

w/Horizontal

Wood

Crossarms

40 Conductor 8.016 NOR 69 Presque Isle

Switching Station

Mapleton6913

9.219 SOR 46 Medway East Millinocket89

Interstate 95

Crossing

Valley Avenue

Var Single Wood

Pole

w/Horizontal

Wood

Crossarm

18 Conductor

Peak

Load

Flow (MW)

Chap

ter 330 Page No.

Operating District

Operating Voltage (kV

)

From Substation

39.8

1950s Single Wood

Pole

w/Horizontal

Wood

Crossarm

25 Conductor 15.017 SOR 46

Pole Age Bin

Summary of most recent

Groundline Pole Inspection data

To Substation

Year Built/Rebuilt

Construction Type

Summer Line Rating (M

VA)

Limiting Element

Conductor

Line Segment

Length Summary of Poles

Line No.

ATTACHMENT 2

ROW (Miles)

Road

side (Miles)

Total (Miles)

Type Length (Miles)

Qty ROW Poles

Avg Age

ROW Poles

Qty Road

side Poles

Avg Age

Road

side Poles

Qty Poles Inspected


% In

ternal Decay


% External Decay

Quan

tity Rejected

Percent Rejected


CommentsPeak

Load

Flow (MW)

Chap

ter 330 Page No.

Operating District


)

From Substation

Pole Age Bin



To Substation

Year Built/Rebuilt

Construction Type


VA)

Limiting Element

Conductor

Line Segment


Line No.

266 ACSR 2.45 565 1978 221 1986 less than 1950 7 6 86% 0 0% 0 0%

312 AAAC 0.19 1950‐1959 30 30 100% 0 0% 2 7%

336 AAC 1.25 1960‐1969 131 65 50% 7 5% 0 0%

4/0 ACSR 18.69 1970‐1979 194 79 41% 12 6% 0 0%

795 AAC 0.50 1980‐1989 48 6 13% 1 2% 0 0%

795 ACSR 0.12 1990‐1999 122 3 2% 6 5% 0 0%

2000‐2009 3 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Totals 535 189 35% 26 5% 2 0%

266 ACSR 11.89 225 1967 0 N/a less than 1950 0 0 0 0

1950‐1959 54 38 70% 0 0% 1 2%

1960‐1969 0 0 0 0

1970‐1979 15 7 47% 1 7% 0 0%

1980‐1989 0 0 0 0

1990‐1999 7 0 0% 0 0% 0 0%

2000‐2009 4 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Total 80 45 56% 1 1% 1 1%

266 ACSR 6.58 56 1967 169 1980 less than 1950 0 0 0 0

312 AAAC 0.70 1950‐1959 0 0 0 0

336 AAC 0.08 1960‐1969 46 17 37% 0 0% 0 0%

336 AAC 15KV 0.15 1970‐1979 0 0 0 0

336 AAC 35KV 0.59 1980‐1989 0 0 0 0

559 AAAC 0.29 1990‐1999 7 0 0% 0 0% 0 0%

2000‐2009 3 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Totals 56 17 30% 0 0% 0 0%

#2 ACSR 0.65 104 1979 592 1979 less than 1950 0 0 0 0

#4 ACSR 0.04 1950‐1959 0 0 0 0

#4 CU 12.81 1960‐1969 0 0 0 0

#6 CU 0.45 1970‐1979 0 0 0 0

336 AAC 5.16 1980‐1989 88 52 59% 0 0% 0 0%

336 AAC 15KV 4.88 1990‐1999 11 2 18% 0 0% 0 0%

336 AAC 35KV 0.29 2000‐2009 0 0 0 0

2010 and newer 0 0 0 0

Totals 99 54 55% 0 0% 0 0%

1

2

20

11.89 0.00 11.89

2.70 21.60 24.30

Multiple small scale capital projects

conducted over past 10 years to

replace poles with insufficient/shell

thickness/strength

1957 H‐Frame Wood

Poles w/wood

crossarms

108 Conductor 57.022 NOR 138 Flo's Inn US/Canada

Border

3855

4.28 4.40 8.69

6.224 SOR 34.5 Scotts Hill Line 19/20

Switch,

Dennysville

1950s Single Wood

Pole

w/Horizontal

Wood

Crossarm

8 Conductor

1960s Single Wood

Pole

w/Horizontal

Wood

Crossarm

27 Conductor 21.123 SOR 34.5 Grant Street Trenton

21 SOR 46 Graham Station

46kV

Boggy Brook Var Single Wood

Pole

w/Horizontal

Wood

Crossarm

28 Conductor 13.3 16.13 7.27 23.40

ATTACHMENT 2

ROW (Miles)

Road

side (Miles)

Total (Miles)

Type Length (Miles)

Qty ROW Poles

Avg Age

ROW Poles

Qty Road

side Poles

Avg Age

Road

side Poles

Qty Poles Inspected


% In

ternal Decay


% External Decay

Quan

tity Rejected

Percent Rejected


CommentsPeak

Load

Flow (MW)

Chap

ter 330 Page No.

Operating District


)

From Substation

Pole Age Bin



To Substation

Year Built/Rebuilt

Construction Type


VA)

Limiting Element

Conductor

Line Segment


Line No.

#4 ACSR 2.31 7 2013 432 1983 less than 1950

#4 CU 3.71 1950‐1959

#6 CU 0.08 1960‐1969

1/0 AAAC 6.31 1970‐1979

336 AAC 1.72 1980‐1989

336 AAC 15KV 0.09 1990‐1999

2000‐2009

2010 and newer

Totals

3/0 ACSR 15.30 189 1974 0 N/a less than 1950 0 0 0 0

795 ACSR 0.11 1950‐1959 158 71 45% 0 0% 16 10%

1960‐1969 0 0 0 0

1970‐1979 0 0 0 0

1980‐1989 1 0 0% 0 0% 0 0%

1990‐1999 2 0 0% 0 0% 0 0%

2000‐2009 8 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Totals 169 71 42% 0 0% 16 9%

336 ACSR 8.97 160 1965 0 0 less than 1950 0 0 0 0

1950‐1959 0 0 0 0

1960‐1969 148 66 45% 0 0% 1 1%

1970‐1979 0 0 0 0

1980‐1989 0 0 0 0

1990‐1999 6 0 0% 0 0% 0 0%

2000‐2009 2 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Total 156 66 42% 0 0% 1 1%

#2 CU 19.40 363 1960 0 0 less than 1950 0 0 0 0

1950‐1959 261 163 62% 27 10% 3 1%

1960‐1969 11 6 55% 0 0% 0 0%

1970‐1979 0 0 0 0

1980‐1989 6 0 0% 0 0% 0 0%

1990‐1999 41 0 0% 0 0% 0 0%

2000‐2009 4 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Total 323 169 52% 27 8% 3 1%

25

50

19.40 0.00 19.40

8.97 0.00 8.97

0.25 13.82 14.07

15.43 0.00 15.43

Structure 22 to US/Canada border

excluding taps to generators


completed over past 10 years to

replace poles identified with

insufficient shell/thickness/strength

during groundline pole inspection

Capital project completed in 2013 to

replace five 1950s ROW poles identified

with insufficient shell

thickness/strength

1957 Single Wood

Pole w/Wood K‐

Frame

Crossarms

25 Conductor 13.526

1952 H‐Frame Wood

Poles

w/Horizontal

Wood

Crossarms

45 Conductor 16.028 NOR 69 Bridgewater Mullen6910

1964 H‐Frame Wood

Poles

w/Horizontal

Wood

Crossarms

48 Conductor 40.027 NOR 69 Structure 22 US/Canada

Border

6901

SOR 46 Pushaw Road East Corinth

Late

1980s/

early

1990s

Single Wood

Pole

w/Horizontal

Wood

Crossarm

8 Conductor 2.925 SOR 34.5 Line 16 Tap Jonesport

ATTACHMENT 2

ROW (Miles)

Road

side (Miles)

Total (Miles)

Type Length (Miles)

Qty ROW Poles

Avg Age

ROW Poles

Qty Road

side Poles

Avg Age

Road

side Poles

Qty Poles Inspected


% In

ternal Decay


% External Decay

Quan

tity Rejected

Percent Rejected


CommentsPeak

Load

Flow (MW)

Chap

ter 330 Page No.

Operating District


)

From Substation

Pole Age Bin



To Substation

Year Built/Rebuilt

Construction Type


VA)

Limiting Element

Conductor

Line Segment


Line No.

266 ACSR 3.39 63 1994 0 N/a less than 1950 0 0 0 0

3/0 ACSR 0.54 1950‐1959 2 1 50% 0 0% 0 0%

1960‐1969 25 12 48% 0 0% 2 8%

1970‐1979 1 0 0% 0 0% 0 0%

1980‐1989 6 2 33% 0 0% 0 0%

1990‐1999 11 0 0% 0 0% 0 0%

2000‐2009 2 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Totals 47 15 32% 0 0% 2 4%

266 ACSR 17.70 182 1972 0 N/a less than 1950 0 0 0 0

1950‐1959 0 0 0 0

1960‐1969 134 50 37% 0 0% 1 1%

1970‐1979 4 4 100% 0 0% 0 0%

1980‐1989 26 8 31% 0 0% 0 0%

1990‐1999 0 0 0 0

2000‐2009 0 0 0 0

2010 and newer 0 0 0 0

Total Poles 164 62 38% 0 0% 1 1%

266 ACSR 13.40 53 1978 375 1983 less than 1950 0 0 0 0

336 AAC 0.18 1950‐1959 5 5 100% 0 0% 0 0%

4/0 ACSR 9.67 1960‐1969 0 0 0 0

1970‐1979 30 29 97% 0 0% 1 3%

1980‐1989 2 2 100% 0 0% 0 0%

1990‐1999 8 4 50% 0 0% 0 0%

2000‐2009 0 0 0 0

2010 and newer 0 0 0 0

Totals 45 40 89% 0 0% 1 2%

#2 CU 5.65 160 1974 628 1984 less than 1950 0 0 0 0

1/0 CU 18.79 1950‐1959 12 6 50% 2 17% 0 0%

266 ACSR 0.07 1960‐1969 4 1 25% 1 25% 0 0%

336 AAC 0.03 1970‐1979 10 2 20% 1 10% 0 0%

336 AAC 46KV 0.81 1980‐1989 2 0 0% 0 0% 0 0%

4/0 AL 4W 600V URD 0.01 1990‐1999 2 1 50% 0 0% 0 0%

4/0 CU 600V 0.05 2000‐2009 1 0 0% 0 0% 0 0%

2010 and newer 0 0 0 0

Totals 31 10 32% 4 13% 0 0%

73

74

5.17 20.25 25.42

2.31 20.99 23.30

3.93 0.00 3.93

17.72 0.00 17.72 Capital project completed in 2007 to

replace a dozen poles identified with

insufficient shell thickness/strength and

decaying pole tops


conducted over past 10 years to

replace poles identified with with

insufficient shell thickness/strength

29 SOR 46 Broadway Pushaw

Road/East

Bangor

1957 Single Wood

Pole w/Wood K‐

Frame

Crossarms

25 Conductor 23.6

1964 Single Wood

Pole w/Wood K‐

Frame

Crossarms

34 Conductor 10.430 SOR 46 Milo East Corinth

1950s Single Wood

Pole

w/Horizontal

Wood

Crossarm

18 Conductor 8.032 SOR 46 Chester Medway84

1950s Single Wood

Pole

w/Horizontal

Wood

Crossarm

28 Conductor 8.831 SOR 46 Milford Stanford80

ATTACHMENT 2

Transmission Line Loading (based on a projected growth from the 2010 Transmission Needs Assessment Analysis)Nom. Sum. Norm. Summer Peak Hour

Line No. From To Voltage Conductor Length (mi.) Rating (MVA) Loading (N-1) Contingency Notes390 Orrington Baileyville 345kv 1192 ACSR 84.4 1773 1000 max S396 Loading managed by ISO246 Orrington Veazie 115kv 2-795 ACSR 7.25 457 294.4 L248 Light load, high gen248 Orrington Veazie 115kv 795 ACSR 7.25 229 220.8 L246 Light load, high gen249 Orrington Veazie 115kv 795 ACSR 7.25 229 220.8 L246 Light load, high gen65 Orrington Bucksport 115kv 795 ACSR 5.36 229 125.2 S205205 Orrington Bucksport 115kv 795 ACSR 5.36 229 125.2 S65247 Orrington Orrington 115kv 266 ACSR 4.07 39 25 none60 Orrington Ellsworth Falls 115kv 795 ACSR 20.67 229 100.8 L6666 Veazie Clifton 115kv 795 ACSR 13.41 173 104.8 L6051 Clifton Township 16 115kv 795 ACSR 14.9 233 32.5 L57 Gen loading higher93 Township 16 Deblois 115kv 795 ACSR 10.71 233 32.3 L57 Gen loading higher52 Deblois Columbia 115kv 795 ACSR 9.15 229 32.3 L57 Gen loading higher61 Columbia Jonesboro 115kv 4/0 ACSR 12 32 25 L5967 Clifton Ellsworth Falls 115kv 795 ACSR 13.07 173 75 L6068 Ellsworth Falls Ellsworth Falls 115kv 266 & 795 ACSR 0.59 115 56.1 L5757 Ellsworth Falls Trenton 115kv 795 ACSR 14.3 229 55.4 L6858 Ellsworth Sullivan 115kv 795 ACSR 22.45 229 33.1 L51 Gen loading higher59 Sullivan Columbia 115kv 795 ACSR 21.7 229 35 L51 Gen loading higher59 Columbia Columbia 115kv 266 ACSR 3.63 89 40 L51 Gen loading higher69 Columbia Harrington 115kv 266 ACSR 0.66 89 16.2 L6164 Veazie Chester 115kv 2-795 ACSR 43.48 375 220 Keene T1 voltage limited rating63 Chester Chester 115kv 795 ACSR 0.37 68 42.7 W.Enf. Gen62 Chester TA R7 Wels 115kv 795 ACSR 17.26 229 126 none

- Loading on the Bangor Hydro Region 115kv and above circuits were based on local transmission criteria. The majority of these lines will also fall under NERC reliability criteria and subject to N-1-1 and stuck breaker evaluations.

BANGOR DIVISION - Projected growth rate 0.86% per year1 Veazie Ellsworth Falls 46kv 4/0, 266,312,336,795 23.4 28 13.3 Boggy T15 Veazie Old Town 46kv 336 H, 336, 556H, 559 10.75 35 27.3 none7 Veazie Milford 46kv 266, 336, 556H 10.56 34 25.5 L838 Veazie Hampden 46kv 266, 556H, 795, 750UG 7.69 34 38.9 L9 Final sections in 2014/15 plans9 Veazie Brewer 46kv 795 ACSR 6.68 72 58.3 L8370 Veazie Bangor 46kv 559AAAC, 795ACSR 8.48 53 21.5 L7171 Veazie Bangor 46kv 556H, 559, 795 4.89 52 48.8 L72 will monitor72 Veazie Bangor 46kv 556H, 559, 795 4.89 52 48.8 L71 "50 Bangor Corinth 46kv 3/0 ACSR, 795 15.4 25 13.5 L8174 Corinth Milo 46kv 266 ACSR 17.7 34 10.4 L5073 Bangor Bangor 46kv 3/0, 266 ACSR 3.9 25 23.6 L70 evaluating in 201475 Bangor Bangor 46kv 3/0 ACSR, 336H 3.2 25 15.5 L7876 Brewer Bangor 46kv 336, 556H, 795 0.83 46 32.5 L877 Hampden Hermon 46kv 556H, 795, 600UG 4.68 46 17.9 L7078 Bangor Hermon 46kv 795 ACSR 6.41 72 26.1 L7779 Bangor Bangor 46kv 795 ACSR 1.34 72 15.5 none

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ATTACHMENT 3

Nom. Sum. Norm. Summer Peak HourLine No. From To Voltage Conductor Length (mi.) Rating (MVA) Loading (N-1) Contingency Notes

HANCOCK DIVISION - Projected growth rate 1.21% per year2 Ellsworth Trenton 34.5kv 266, 312, 336, 336H, 559 8.7 27 21.1 Trenton T110 Ellsworth Falls Sedgewick 46kv 1/0 ACSR, 4/0, 336, 336H, 559, 795 23.73 19 11.7 none11 Ellsworth Falls Hancock 34.5kv 795 ACSR 6.48 37 22.3 Trenton T112 Ellsworth Falls Ellsworth 34.5kv 477 ACSR 2.55 30 27.9 Trenton T1 will monitor13 Hancock Sullivan 34.5kv 3/0, 556H, 795 16.4 18 12.3 Tunk T117 Sullivan Cherryfield 34.5kv 266, 336H, 559, 795 11.1 27 12.3 Tunk T118 Cherryfield Harrington 34.5kv 266, 336H 7.11 27 12.3 Tunk T122 Bar Harbor Bar Harbor 34.5kv 1/0, 336, 336H 6.26 14 14.6 none one section 1/0 replace w/Sub24 Sullivan Gouldsboro 34.5kv 266 ACSR 6.48 27 5.7 L1528 Hancock Trenton 34.5kv 3/0, 266, 312, 336, 336H, 350UG, 556H, 559 8.47 18 8.4 Trenton T129 Mount Desert Island Southwest Harbor 34.5kv #2 ACSR, 1/0 AAAC, 336H 5.49 11 6.3 none32 Trenton Bar Harbor 34.5kv 559, 1000MCM, 795 6.28 40 27.8 L4840 Bar Harbor Northeast Harbor 34.5kv #4 ACSR, 1/0 AAAC, 336, 336H, 795 5.95 8.6 2.8 none48 Trenton Mount Desert Island 34.5kv 556H, 559, 795 7.39 36 28.4 L32

WASHINGTON COUNTY - Projected growth rate 0.75% per year3 East Machias Jonesboro 34.5kv 266, 312, 336, 336H 8.32 27 14.6 L44 East Machias Jonesboro 34.5kv 336 AAC, 336H 9.65 27 15 L314 Jonesboro Columbia Falls 34.5kv #4, #6, 1/0, 336, 336H 10.2 8 4.6 L1615 Harrington Gouldsboro 34.5kv 336, 336H 18.71 27 5.4 L2416 Harrington Jonesboro 34.5kv 336, 336H, 556H 14.59 36 18 Washington Cty T119 East Machias Eastport 34.5kv 1/0H, 4/0, 336, 336H, 556H, 559 39.58 13 6.2 L2020 East Machias Dennysville 34.5kv #2, #4, #6, 336, 336H 24.38 8 6.2 L1921 Jonesboro Machiasport 34.5kv 266 ACSR 9.61 27 0.8 none23 East Machias Cutler 34.5kv #4 cu, 1/0 ACSR, 336H 6.88 10 0.8 none25 Columbia Falls Jonesport 34.5kv #4, #6, 1/0, 336, 336H 14.1 8 2.9 none26 Whiting Lubec 34.5kv 333Hendrix AAC 8.91 27 1.6 none

NORTHERN DIVISION - Projected growth rate 0.3% per year80 Milford Enfield 46kv 4/0, 266, 336, 336H 23.11 28 8.8 L8181 Enfield Milo 46kv 2A Cweld, 266, 336H, 559 18.52 19 11.3 L5082 Enfield Howland 46kv #2 cu, 1/0, 266 1.27 18 0.8 none83 Lincoln Enfield 46kv 266 ACSR 12.11 36 7.6 W.Enf. Gen84 Chester Medway 46kv #2, 1/0, 4/0, 266, 336H 25.33 18 8 L8685 Chester Lincoln 46kv 336H, 556H, 559 1.87 34 21.7 L8786 Chester Medway 46kv 266 ACSR, 336 AAC 15.79 36 6 none87 Chester Lincoln 46kv 336H, 556H, 559 1.87 34 19 L8588 Medway Millinocket 46kv 312, 336, 559 9.16 36 9.2 L8989 Medway Millinocket 46kv #2, 266, 336, 336H, 559 13.39 18 9.2 L8890 Chester Chester 46kv 336 AAC, 336H AAC 0.81 34 2.2 none

** Thermal loading is just one factor in determining circuit capability. Voltage drop across the line and line condition must also be taken into account. - Loadings based on Transmission Study results which are performed every 5 years. Loadings for years in between will be study loads increased by the projected growth rates.

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ATTACHMENT 3

Documents

Director of Electricity and Gas Utilities State House ...€¦ · The second attachment, entitled "Emera Maine 2015 Chapter 330 Project Condition Detail", is a more detailed analysis