Enfield, East Windsor, South Windsor

56 Prospect Street P.O. Box 270 Hartford, CT 06103

Kathleen M. Shanley Manager – Transmission Siting Tel: (860) 728-4527

October 18, 2018

Melanie Bachman, Executive Director Connecticut Siting Council Ten Franklin Square New Britain, CT 06051

Re: Sub-Petition No. 1293-EEWSW-01

Dear Ms. Bachman:

The Connecticut Light and Power Company doing business as Eversource Energy ("Eversource") is filing the attached Sub-Petition No. 1293-EEWSW-01 with the Connecticut Siting Council ("Council"), regarding maintenance work within its transmission right-of-way in Enfield, East Windsor, and South Windsor, Connecticut. The work includes replacing 33 existing wooden transmission structures with new weathering steel transmission structures.

Eversource notified the official of the municipalities of Enfield, East Windsor, and South Windsor of Eversource’s submission of the Sub-Petition and sent copies of the Sub-Petition to owners of directly abutting properties (see Proof of Notice).

Enclosed please find an original and 3 copies of this filing.

Please contact me at 860-728-4527 if you have any questions regarding the enclosed Sub-Petition.

Sincerely,

Enclosures

Attachments: Exhibit A: Sub-Petition Exhibit B: Photographs and Photo Simulation Exhibit C: Maps Exhibit C: Abutter Letter and Proof of Notice

ATTACHMENT A

SUB-PETITION THE CONNECTICUT LIGHT AND POWER COMPANY doing business as EVERSOURCE ENERGY

Sub-Petition CONNECTICUT SITING COUNCIL - PETITION NO. 1293 TRANSMISSION FACILITY ASSET CONDITION MAINTENANCE IMPROVEMENTS TO COMPLY WITH THE UPDATED NATIONAL ELECTRIC SAFETY CODE CLEARANCE REQUIREMENTS

Towns: Enfield, East Windsor, and South Windsor

Sub-Petition No. 1293-EEWSW-01

Project: 1100/1200/1300 Transmission Line Structure Replacement Project

Structure Location: 33 Transmission Structures located in Enfield, East Windsor, and South Windsor, Connecticut

I. Introduction:

In accordance with Condition 1 of the March 30, 2017 ruling by the Connecticut Siting Council (the "Council") (as set forth in the Council's March 31, 2017 letter) regarding Petition No. 1293, The Connecticut Light and Power Company doing business as Eversource Energy ("Eversource") submits this Sub-Petition.

II. Description of Transmission Work Activities:

Eversource’s 1100/1200/1300 Transmission Line Structure Replacement Project is part of an ongoing maintenance program, which evaluates the integrity of its utility structures and implements repair, upgrade or replacement in order to ensure the safe and reliable transmission of power to its customers. Due to asset condition, many structures require replacement on a portion of the 1100/1200/1300 Line where the 1300/1100 Line runs as a double circuit line between Pleasant Road in Enfield and Prospect Hill Road in East Windsor and where the 1300/1200 Line runs as a double circuit line between South Water Street in East Windsor and Prospect Hill Road in South Windsor, and where the 1100/1200 Line runs as a double circuit line between Interstate 91 (“I-91”) North in East Windsor and Barbour Hill Substation in South Windsor. The 1100 Line, in its entirety, is a 115-kV transmission line that extends from Enfield Substation in Enfield to Barbour Hill Substation in South Windsor. The 1200 Line, in its entirety, is a 115-kV transmission line that extends from Windsor Locks Substation in Windsor Locks to Barbour Hill Substation in South Windsor. The 1300 Line, in its entirety, is a 115-kV transmission line that extends from Enfield Substation in Enfield to Windsor Locks Substation in Windsor Locks. See Figure 1 for a diagram of the lines and an overview of the project area. Of these replacements, 33 structures require a slight increase in structure height to comply with current clearance requirements. The 33 structures to be replaced are a mixed design of H-frames and monopoles.

Eversource plans to conduct transmission structure replacement work to remediate wood structure damage caused by structure age, weather, and woodpecker activity. The following work ("Work Activities") will be performed: 1

• Replace 33 existing wood structures with new weathering steel structures of the same design that are slightly taller (10 feet or less) than the existing structures. The replacement structures will be installed within 15 feet of the existing structures.

Ill. No Substantial Adverse Environmental Effect:

Eversource respectfully submits that the proposed modifications would have no "substantial adverse environmental effect" pursuant to Conn. Gen. Stat. § 16-50k, based on the following factors:

a) Work Activities would take place in areas within Eversource's property and existing rights-of-way ("ROWs") utilizing existing and proposed new permanent access roads, as well as some temporary access roads (collectively the "Work Areas"). Some of the existing access roads will need to be improved. Eversource can access the structure locations utilizing its existing rights, but is currently working with private landowners to obtain rights to utilize alternative off-ROW access routes that would minimize the amount of proposed new access roads that would need to be installed within the ROWs. In some areas, alternative off-ROW access routes would lessen the impact to wetlands and/or residential/agricultural areas.

b) Utilizing existing rights, Work Activities would result in ±39,573 square feet (“SF”) of temporary wetland impacts limited to temporary construction matting required for the construction of access roads to structures 6093/6093A, 6092, 6085/6085A, and 6207 and work pads for structures 6093/6093A, 6092, 6085/6085A, and 6083/6083A. See the table below for wetland impact details.

Temporary Wetland Access Roads Construction Work Pads Impacts (SF) Access to structure 6093/6093A ±2,208 Access to structure 6092 ±481 Access to structure 6085/6085A ±19,302 Access to structure 6207 ±1,100 Structure 6093/6093A ±2,280 Structure 6092 ±9,285 Structure 6085/6085A ±3,566 Structure 6083/6083A ±1,351 Total: ± 39,573 (SF)

Work would be conducted in accordance with Eversource’s Best Management Practices Manual for Massachusetts and Connecticut (Construction and Maintenance Environmental Requirements), September 2016 (“BMPs") to avoid impact to nearby wetland and watercourse resources.

c) No vernal pools are located in proximity to the Work Activities.

d) As a result of Eversource’s review of the Connecticut Department of Energy and Environmental Protection's (“CTDEEP”) Natural Diversity Data Base ("NDDB"), only Work Areas associated with the access and work pads for structures 6093/6093A, 6092, 6206, and 6207 are proposed within a NDDB buffered area and wetland jurisdictional area and therefore would be subject to a NDDB review request. Eversource is currently in consultation with CTDEEP regarding its proposed work in these areas and will adhere to any state-listed species protection measures recommended by CTDEEP, as necessary. Any recommended measures will be incorporated into 2 the Company's BMPs during construction. With these protection measures, no adverse impacts to state-listed rare species are anticipated.

e) The Work Activities will not require any tree clearing. However, Eversource may need to undertake minor tree trimming and/or vegetation removal/mowing within the managed ROW corridor to improve access to portions of the Work Areas.

f) A Phase IA assessment review of previously recorded cultural resources on file with the Connecticut State Historic Preservation Office conducted by Heritage Consultants, LLC did not identify that any National or State Register of Historic Places properties/districts are located within 500 feet of the Work Areas. Based on a review of historic maps, aerial photographs and available soil profiles, ten of the proposed work pad locations were identified to possess a potential for moderate to high archaeological sensitivity. A Phase 1B cultural reconnaissance survey (shovel pit testing) at these locations found no physical evidence of archaeological significance, therefore, no further investigation is recommended or warranted.

g) Increased heights of the 33 replacement structures average approximately 6 feet and none will exceed 10 feet.

h) Replacement structures would be located within 15 feet of existing structures.

i) With the exception of a portion of the access road and work pad for structure 6093/6093A and a portion of the work pad for structure 6092, which are located in a 100-year flood zone associated with Boweyns Brook, there are no 100-year flood zones in the Work Areas. No work will occur within the mapped 100-year flood zones except for the use of temporary construction matting. Eversource would utilize its BMPs to minimize any impacts to the flood zones associated with the access roads by not placing fill that would increase the elevations of the road surface to ensure that the floodplain hydrology is not adversely affected. Therefore, no adverse impact to the 100-year flood zone will result from the proposed Work Activities.

j) No change in noise levels would result from installation of the new structures and the applicable lines would continue to comply with the State of Connecticut noise regulations.

k) Any changes in electric and magnetic field levels outside of the ROW would be negligible.

IV. Mitigation:

Temporary environmental effects from construction will be mitigated as follows:

• Erosion and sediment controls (“E&S”) will be employed and maintained, as needed, throughout the execution of the Work Activities in accordance with the 2002 Connecticut Guidelines for Soil Erosion and Sediment Control and the BMPs.

• Potential impacts to wetlands will be mitigated with the use of temporary matting and adherence to the BMPs.

• NDDB recommended rare species protective measures will be incorporated into the Company's BMPs during construction.

3 • Potential impacts to the 100-year flood zone associated with Boweyns Brook would be avoided with adherence to the BMPs and the use of temporary construction matting.

• Eversource's contractor would perform construction sequencing such that any earth materials are exposed for a minimum amount of time before they are covered, seeded, or otherwise stabilized to prevent erosion.

• During construction, when necessary, anti-tracking mats would be installed at construction entrances onto public roads to prevent tracking of soil onto local streets.

• Upon completion of the Work Activities, all disturbed/exposed areas would be stabilized and revegetated. After the establishment of permanent ground cover, Eversource's contractor would remove the temporary E&S controls and remove/dispose of any accumulated sediments and debris from areas where such measures were used.

V. Access:

Some new permanent access roads would be constructed to facilitate access to structures within the ROW and existing access roads may be hardened and temporarily widened at turning areas to facilitate the safe passage of construction vehicles. Construction matting would be used on temporary access roads in wetlands as well as in agricultural/maintained lawn upland areas. The matting will be removed upon completion of the Work Activities and the areas restored, as necessary.

Eversource would access the Work Areas by entering its ROW from existing access points on public roads as follows:

• Pleasant Street for structures 6093/6093A and 6092 (off-ROW access from an alternative location on Pleasant Street would be used if rights are obtained) • Bridge Street for structures 6090/6090A and 6085 • Prospect Hill Road for structures, 6085A, 6084/6084A, 6083/6083A, and 6202 (off-ROW access from an alternative location on Prospect Hill Road would be used for structure 6083/6083A if rights are obtained) • I-91 North Exit 44 offramp for structures 6080/6080A and 6203A • Main Street for structures 6207, 6206, 6205A, and 6204 • Scantic Road for structures 6184 and 6183 • Napoleon Drive for structure 6171 • Windsorville Road for structures 6169 and 6167 • Wapping Road for structures 6163, 6162, and 6160/6160A • Maskel Road for structures 6145, 6143, and 6142 • Barber Hill Road for structures 6140 and 6137A

By:

______Kathleen M. Shanley Manager - Transmission Siting

ATTACHMENT B

PHOTOGRAPHS AND

PHOTO SIMULATION

Structure #6083

Age Related Decay/Rot

Deteriorating Mechanical Connections

Structure #6093

Age Related Decay/Rot

Woodpecker Damage

Structure #6142

Split Pole

Age Related Decay

Structure #6167

Split Pole

Woodpecker Damage

Deteriorating Mechanical Connections

EXISTING 1100/1300 LINE LOCATION ORIENTATION BIG Y PARKING LOT - 67 PROSPECT HILL ROAD STRUCTURE 6083 SOUTHWEST EAST WINDSOR, CT PROPOSED 1100/1300 LINE LOCATION ORIENTATION BIG Y PARKING LOT - 67 PROSPECT HILL ROAD STRUCTURE 6083 SOUTHWEST EAST WINDSOR, CT

ATTACHMENT C

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 101 STARVISH PETER M + SUSAN A PLEASANT RD ENFIELD CT 06802 103 EAST WINDSOR LIMITED PARTNERSHIP II BRIDGE ST EAST WINDSOR CT 06088 104 CONNECTICUT STATE OF 157 PROSPECT HILL RD EAST WINDSOR CT 06088 P LL #104 L E A S A N T S 91 T ¨¦§ R !! E [[ !!! E [[ !H [[ ! T [[ !!!! [[ [[ LL #101 [[ [[ 80 [[ [[ [ [[ 80 [ [[ [ [[ [ [ [[ [ [ [[ LL #104 [[ [ [ 1100 Line [[ [ [[ [[ TEMPORARY [[ [[ [[ [[ [[ [[ [ [ [[ WETLAND IMPACTS [ [ [ [ [[ [[ [[ [ [ [[ [ !( [ [ [[ [ [[ 481 SQ. FT. [[ [ [[ [[ [ [ [ [[ [ [[ [[ [ [ [ Enfield TEMPORARY !( [[ [[ WETLAND IMPACTS 6091 [[ 2,208 SQ. FT. 6091

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 103 EAST WINDSOR LIMITED PARTNERSHIP II BRIDGE ST EAST WINDSOR CT 06088 104 CONNECTICUT STATE OF 157 PROSPECT HILL RD EAST WINDSOR CT 06088 107 EAST WINDSOR PROPERTIES LTD PARTNERSHIP 69 PROSPECT HILL RD EAST WINDSOR CT 06088 PROSPECT HILL DR NORTH ROAD

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 107 EAST WINDSOR PROPERTIES LTD PARTNERSHIP 69 PROSPECT HILL RD EAST WINDSOR CT 06088 108 PROSPECT HILL PROPERTIES LTD PARTNERSHIP 67 PROSPECT HILL RD EAST WINDSOR CT 06088 118 MATHER RICHARD K REVOCABLE TRUST MAIN ST EAST WINDSOR CT 06088

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 112 WAREHOUSE POINT HOUSING FOR ELDERLY 235 MAIN ST EAST WINDSOR CT 06088 113 KING STREET ASSOCIATES LLC 237 MAIN ST EAST WINDSOR CT 06088 116 CONN LIGHT & POWER CO MAIN ST EAST WINDSOR CT 06088 118 MATHER RICHARD K REVOCABLE TRUST MAIN ST EAST WINDSOR CT 06088 P

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 122 FOSTER SHERRYL 95 SCANTIC RD EAST WINDSOR CT 06088 124 PAUFVE STEVEN S & SANDRA J 109 SCANTIC RD EAST WINDSOR CT 06088 J£

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 135 EAST WINDSOR SPORTSMAN CLUB INC APOTHECARIES HALL RD EAST WINDSOR CT 06088 137 APOTHECARIES HALL ENTERPRISES LLC APOTHECARIES HALL RD EAST WINDSOR CT 06088 138 APOTHECARIES HALL ENTERPRISES LLC WINDSORVILLE RD EAST WINDSOR CT 06088 ,

CAUTION: ACTIVE FIREARM PRACTICE RANGE 170 170 (FIREARMS DIRECTION TO SOUTH/ROW) East Windsor BERM PROTECTION ASSUMED

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 137 APOTHECARIES HALL ENTERPRISES LLC APOTHECARIES HALL RD EAST WINDSOR CT 06088 138 APOTHECARIES HALL ENTERPRISES LLC WINDSORVILLE RD EAST WINDSOR CT 06088 LL #137

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Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 138 APOTHECARIES HALL ENTERPRISES LLC WINDSORVILLE RD EAST WINDSOR CT 06088 140 CONN LIGHT & POWER CO WAPPING RD EAST WINDSOR CT 06088 143 GILSON BARBARA 57 WAPPING RD EAST WINDSOR CT 06088 East Windsor

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180 !! J£ 6162 200

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M IL L E R R O A D

Suffield Enfield Somers Legend East Granby ! Proposed Structure Existing Access FEMA 100-Year Flood Zone Windsor Locks !( Existing Structure Proposed Access Floodway 1100/1200/1300 LINE !! Existing Structure to be Removed Proposed Alternate Access Eversource-Owned Property STRUCTURE REPLACEMENT PROJECT East Windsor µ Stone Work Pad Ellington Overhead Eversource Line State-Owned Property Existing Right-of-Way Temporary Construction Matting Municipal boundary ? 2 Foot Contour Delineated perennial watercourse Parcels ? Delineated intermittent watercourse µ 10 Foot Contour Windsor [[ Delineated wetland boundary Fence 1 inch = 200 feet Kleinschmidt Project No. 4238032 Delineated wetland EAST WINDSOR, CT J£ Gate October 18, 2018 South Windsor Vernon H! Culvert Critical Habitat Scale In Feet NDDB Area Path: Path: G:\_Client_Data\Eversource\4238032\_MXD\EversourceLines_1100_1200_1300_Str_SubPetition_Final_Ver6_10182018.mxd Bloomfield Index Map 100 50 0 100 Map Sheet 8 of 10 1100/1200/1300 Line Structure Replacement Project Map Sheet 9 Abutters Table

Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 152 GREGORY DOUGLAS W & IRMA A 174 MASKEL ROAD SOUTH WINDSOR CT 06074 153 MURPHY EDWARD F & DEBORAH B 160 MASKEL ROAD SOUTH WINDSOR CT 06074 155 SOUTH WINDSOR TOWN OF 7 FRAZER FIR ROAD SOUTH WINDSOR CT 06074 156 DZEN JOHN D JR & JENNIFER M 275 BARBER HILL ROAD SOUTH WINDSOR CT 06074 !(

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6146 370 !( 360 LL #155

LL #156 J£ 330

6145 !! 350

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6144 340 LL #152 320 !( 1200 South Windsor Line !! J£ !( ! 6143 !! 1100/1200 Line 6144 6142 !( 6140 LL #153 6141 !! !( MASKEL ROAD 310 !( 300

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Suffield Enfield Somers Legend East Granby ! Proposed Structure Existing Access FEMA 100-Year Flood Zone Windsor Locks !( Existing Structure Proposed Access Floodway 1100/1200/1300 LINE !! Existing Structure to be Removed Proposed Alternate Access Eversource-Owned Property STRUCTURE REPLACEMENT PROJECT East Windsor µ Stone Work Pad Ellington Overhead Eversource Line State-Owned Property Existing Right-of-Way Temporary Construction Matting Municipal boundary ? 2 Foot Contour Delineated perennial watercourse Parcels ? Delineated intermittent watercourse µ 10 Foot Contour Windsor [[ Delineated wetland boundary Fence 1 inch = 200 feet Kleinschmidt Project No. 4238032 Delineated wetland SOUTH WINDSOR, CT J£ Gate October 18, 2018 South Windsor Vernon H! Culvert Critical Habitat Scale In Feet NDDB Area Path: Path: G:\_Client_Data\Eversource\4238032\_MXD\EversourceLines_1100_1200_1300_Str_SubPetition_Final_Ver6_10182018.mxd Bloomfield Index Map 100 50 0 100 Map Sheet 9 of 10 1100/1200/1300 Line Structure Replacement Project Map Sheet 10 Abutters Table

Line List # Property Owner Parcel Address Parcel Town/City Parcel State Parcel Zip 155 SOUTH WINDSOR TOWN OF 7 FRAZER FIR ROAD SOUTH WINDSOR CT 06074 156 DZEN JOHN D JR & JENNIFER M 275 BARBER HILL ROAD SOUTH WINDSOR CT 06074 157 DZEN PROPERTIES LLC 244 BARBER HILL ROAD SOUTH WINDSOR CT 06074 161 CONN LIGHT & POWER CO 124 BARBER HILL ROAD SOUTH WINDSOR CT 06074 NDDB Area

LL #157

LL #156 South Windsor

LL #161

300

!! 350 ! !! 320 ! 310 !( 1100/1200 Line 300 6137A 6140 330 6139 Barbour Hill !! !! !( 6138 1100 Line 6137 Substation 340 1200 Line !( !(

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Suffield Enfield Somers Legend East Granby ! Proposed Structure Existing Access FEMA 100-Year Flood Zone Windsor Locks !( Existing Structure Proposed Access Floodway 1100/1200/1300 LINE !! Existing Structure to be Removed Proposed Alternate Access Eversource-Owned Property STRUCTURE REPLACEMENT PROJECT East Windsor µ Stone Work Pad Ellington Overhead Eversource Line State-Owned Property Existing Right-of-Way Temporary Construction Matting Municipal boundary ? 2 Foot Contour Delineated perennial watercourse Parcels ? Delineated intermittent watercourse µ 10 Foot Contour Windsor [[ Delineated wetland boundary Fence 1 inch = 200 feet Kleinschmidt Project No. 4238032 Delineated wetland SOUTH WINDSOR, CT J£ Gate October 18, 2018 South Windsor Vernon H! Culvert Critical Habitat Scale In Feet NDDB Area Path: Path: G:\_Client_Data\Eversource\4238032\_MXD\EversourceLines_1100_1200_1300_Str_SubPetition_Final_Ver6_10182018.mxd Bloomfield Index Map 100 50 0 100 Map Sheet 10 of 10

ATTACHMENT D

ABUTTER LETTER AND

PROOF OF NOTICE

P.O. Box 270 Hartford, CT 06141-0270

October 18, 2018

Dear Neighbor,

As part of our everyday effort to deliver reliable energy to our customers and communities, we’re planning work in your area to replace electric transmission structures. Maintaining the infrastructure that supports the electric lines is one of the ways Eversource ensures the safe, secure transmission of electricity throughout the region.

You’re receiving this letter and a copy of the Sub-Petition because the proposed work would be taking place within the right of way on or near your property in Enfield, East Windsor and South Windsor. A Sub-Petition is a document with detailed information about the proposed upgrades. Eversource is submitting Sub-Petition No. 1293-EEWSW-01 this week to the Connecticut Siting Council (CSC) for its review and approval.

About This Electric System Improvement: What You Can Expect First, we want you to know that this work will not interrupt electric service to your property.

As part of this project, we are proposing to replace, and slightly increase the height of the existing wood structures. The new, weathering steel structures will increase in height by 9 feet or less, depending on the location.

We are proposing to do the work within the existing rights of way on or near your property. The new structures will provide continued reliability of the transmission system.

Connecticut Siting Council Process and Timing With this letter, Eversource is providing notice to you of its proposed work activity, as described in the enclosed Sub-Petition. If you have any comments or concerns about the project, please send them to the CSC at the following address within 30 days of the date of this letter: Melanie Bachman, Acting Executive Director; Connecticut Siting Council; Ten Franklin Square; New Britain, CT 06051. You may also email them to the [email protected]. If you choose to send comments to the CSC, please reference Sub-Petition No. 1293- EEWSW-01 in your correspondence.

Our Commitment to You We are committed to being a good neighbor and doing our work with respect for you and your property. If you would like more information about this work please call 1-800-793-2202, or send an email to [email protected]. Thank you.

Sincerely,

Brian Ragozzine

Brian Ragozzine Eversource Project Manager – Transmission Projects

FIGURE 1

LINE DIAGRAM East Suffield Granby ENFIELD SUBSTATION Enfield

)" ,

WINDSOR LOCKS SUBSTATION 1300 Line

1100 Line 1300 Line

)", 1200 Line Windsor Locks

Ellington

1100/1200 Line East Windsor

Windsor

South Windsor Vernon Bloomfield )", BARBOUR HILL SUBSTATION

Legend 1100 Figure1: Project Overview Map 1200 µ 1300 1100/1200/1300 )" Substation Miles Enfield, East, & South Windsor, CT Municipal boundary 0.5 0.25 0 0.5

Path: Path: G:\_Client_Data\Eversource\4238032\_MXD\EversourceLines_1100_1200_1300_Str_SubPetition_Project_Overview_Map_10122018.mxd Index Map