120/25-kV Gracefield Substation and 120-kV LinesINFORMATION ON THE SOLUTION SELECTED • November 2015

To meet growing demand for electricity, Hydro-Québec conducted draft-design studies in winter 2013-2014 to build a 120/25-kV* transformer substation in Gracefield and rebuild the 120-kV transmission line between Paugan substation, in Low, and Maniwaki substation, in Egan-Sud.

The 65-km line will be rebuilt in the middle of the corridor occupied by the current line. Since the plan calls for adding a circuit, a new 5-km line must be built that follows the existing line from Déléage to the entry to Maniwaki substation.

In addition, a 120-kV line about 5.3 km long must be built to supply the new Gracefield substation.

This bulletin describes the lowest-impact solution selected by Hydro-Québec.

Note: kV is the abbreviation for kilovolt, which is equal to 1,000 volts.

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Gracefield, V

Low, CT

Déléage, M

Aumond, CT

Denholm, MKazabazua, M

Lac-Sainte-Marie, M

Bouchette, M

Messines, MBlue Sea, M

Egan-Sud, M

Sainte-Thérèse-de-la-

Gatineau, M

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Maniwaki, V

!

Maniwaki, V

Kitigan Zibi, R

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Maniwaki, V

La Vallée-de-la-Gatineau (MRC)

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LacBlue Sea

LacHeney

Grand lacRond

Grand lacdes Cèdres

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inea

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LacPitòbìg

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301

107

105

105

Paugansubstation

Maniwakisubstation

Messinessubstation

Kazabazuasubstation

Gracefieldsubstation

(to be rebuilt)

Mont-Lauriertap

76°0'

76°0'

46°2

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0 3 6 km

UTM, zone 18, NAD837339_bu_tet_041_traceretenu_151015.mxd

120-KV LINES AND GRACEFIELD SUBSTATION

Composantes du projet

Tracé retenu pour l’alimentationdu poste de Gracefield

Tracé retenu

Ligne à reconstruire

Postes et lignes de transport existants

69 kV

120 kV

230 kV

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Infrastructures

Route nationale

Route régionale

Route locale301

105

Limite

Municipalité

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Boundary

Municipality

Infrastructure

Provincial highway

Secondary road

Tertiary road

301

105

Existing substations and transmission lines

69 kV

120 kV

230 kV

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Project components

Selected route

Line to be rebuilt

Selected route for Gracefieldsubstation supply line

PROJECT TO DATE

In the previous steps of this project, Hydro-Québec carried out an inventory of the natural and human environments to better understand the host environment for the planned equipment.

Based on its studies and technical, economic and environmental criteria, Hydro-Québec proposed two routes for the Gracefield substation supply line and two variants for the transmission line’s entry at Maniwaki substation.

Hydro-Québec then held information and consultation sessions with various stakeholders. The company gathered the comments of representatives of local organizations, government departments, affected landowners and the general population.

The outcomes of these discussions, combined with the technical, economic and environmental studies, contributed to determining the lowest-impact solution.

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LINE SEGMENT FROM PAUGAN SUBSTATION TO THE MONT-LAURIER SUBSTATION TAP

Paugan substation

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Paugan–Maniwaki transmission line

Line segment between Paugan substation and the Mont-Laurier tap This segment will be rebuilt over 65 km in the middle of the existing corridor. The current line on wooden H-frames will be dismantled before construction begins.

The line will be supported by guyed steel lattice towers in forested areas and reduced-footprint towers in farmland.

To accommodate an additional circuit, the right-of-way must be widened by 4.3 m on either side of the line, for a total width of 39 m.

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0 290 580 m

MTM, zone 9, NAD837339_bu_tet_021_Maniwaki_151015.mxd

Maniwakisubstation

A

Composantes du projet

Tracé retenu

Ligne à reconstruire

Ligne à démanteler

69 kV120 kV

Postes et lignes de transport existants

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69 kV120 kV

Existing substations and transmission lines

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Project components

Selected route

Line to be rebuilt

Line to be dismantled

EXPANSION OF THE ENTRY TO MANIWAKI SUBSTATION

Maniwaki substation

Paugan–Maniwaki transmission line

Line segment between Mont-Laurier tap and Maniwaki substation At Déléage, after the Mont-Laurier substation tap, the new line will run side-by-side with the existing line to the Route 105 crossing.

For the entry to Maniwaki substation, Hydro-Québec has selected Variant A, which routes the new line south of the current line, passing between existing buildings. The company optimized this variant based on concerns expressed by local representatives and affected landowners.

The line segment will be supported by four-legged lattice towers as well as reduced-footprint lattice towers.

This 4.5-km segment will be built to the west of the existing line and require widening the right-of-way by 26.3 m.

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LINE SEGMENT FROM THE MONT-LAURIER SUBSTATION TAP TO MANIWAKI SUBSTATION

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Gracefield substation and supply line

Selected substation site The new 120/25-kV Gracefield substation will be adjacent to the existing substation, near Route 105. This site is close to the load centre and 25-kV distribution system and uses the existing access road and ditches. It minimizes environmental and social impacts by limiting modifications to the landscape.

The fenced area of the planned substation will be about 100 m by 75 m, not including drainage ditches on its periphery. While the planned substation will be built primarily on a lot belonging to Hydro-Québec, the company must acquire part of the adjacent property to accommodate all equipment.

The substation will be supplied by two 120-kV circuits from the main line. A prefabricated building will house the control, protection and telecommunications equipment.

Related work will be required at Paugan and Maniwaki substations to add or modify 120-kV outgoing line structures. This work will take place entirely on Hydro-Québec property.

Gracefield substation supply line Based on the draft-design studies and the public consultation process, Hydro-Québec selected Route A.

This 5.3-km route runs along property boundaries for about 1.8 km, then crosses Chemin Henri and 800 m further turns to follow the relief for better landscape integration and reduced visibility from Route 105. This route also limits the impact on farmland and some wetlands.

The substation supply line will be supported by guyed steel lattice towers in forested areas and reduced-footprint towers in farmland. The planned right-of-way is 39 m wide.

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366

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105

105

Paugansubstation

Maniwakisubstation

Messinessubstation

Kazabazuasubstation

Gracefieldsubstation

(to be rebuilt)

Mont-Lauriertap

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GRACEFIELD SUBSTATION SUPPLY LINE

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Current Gracefield substation

Planned Gracefield substation

76°0'

76°0'

76°2'

76°2'

46°7

'30"

46°7

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46°6

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46°6

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0 330 660 m

MTM, zone 9, NAD837339_bu_tet_020_derivation_151015.mxd

Project components

Planned Gracefield substationSelected routeTransmission line to be rebuilt

The property boundaries shown on this map areapproximate and provided for reference only.

## Existing 69-kV substation andtransmission line

100 %

2015E1395-ACe document est également publié en français. This is a translation of the original French text.

Tangible support for community development Hydro-Québec sees its projects as an opportunity to participate in the development of host communities through the Integrated Enhancement Program (IEP). Once the work has begun, the company grants eligible organizations funding equivalent to 1% of the initially authorized value of the new facilities covered by the IEP.

Schedule Permitting 2016

Land clearing, dismantling of line and construction of substation and new lines Fall 2016–Fall 2018

Dismantling of existing substation 2018-2020

About the construction work Hydro-Québec has planned two phases of construction work. The first phase involves building Gracefield substation and its supply line and rebuilding the transmission line between Paugan substation and the Gracefield substation tap.

The second phase consists of rebuilding the transmission line to the Mont-Laurier tap and building the new line segment from the tap to Maniwaki substation.

To minimize the project’s impacts, Hydro-Québec will implement a range of mitigation measures, ensure environmental compliance monitoring of the worksite and rehabilitate the sites after construction.

Public participationStarting in 2014, Hydro-Québec informed and consulted with the various groups affected by the project: official representatives of the communities, local organizations, members of the business community, ministries, affected landowners and citizens.

This process made it possible to develop mitigation measures to adapt the project to local realities, taking into account the results of the technical, economic and environmental studies carried out for the project.

Once the necessary government permits have been obtained, Hydro-Québec will contact the groups affected to present the planned construction schedule.

For more information Julie Léonard Advisor – Community Relations – Laurentides Direction – Affaires régionales et collectivités E-mail: leonard.julie@hydro.qc.ca

Info-project Line – Laurentides1 8 0 0 4 6 5-1 5 2 1, ext. 6 0 2 2

www.hydroquebec.com/projects/gracefield.html