Toulnustouc generating station

A dam and dyke were built to enlarge the existing {{convert|213|km2}} Lake-Sainte-Anne reservoir for the use by the Toulnustouc hydroelectric project.

RSW of Montreal was selected as the prime consulting engineers.{{sfn|Toulnustouc Dam, Canadian Consulting Engineer}}

VINCI Construction Grands Projets undertook construction.{{sfn|Toulnustouc hydroelectric power project, VINCI}}

The new dam and dyke are about {{convert|14|km}} downstream of the former Lac-Sainte-Anne dam, and added {{convert|22|km2}} to the reservoir.{{sfn|Toulnustouc Dam, Canadian Consulting Engineer}}

The development was carried out in partnership with the Pessamit Council and the Manicouagan Regional County Municipality.{{sfn|En bref - La centrale de Toulnustouc voit le jour}}

Work started in November 2001, and for the next four years the project employed 425 people on average, peaking at 1,200 workers in the summer of 2003.

The average worker was aged over 50.

Total cost was over CDN$800 million.{{sfn|La centrale de Toulnustouc inaugurée}}

The reservoir started to fill on 10 February 2005 and reached its maximum operating level on 29 April 2005.{{sfn|Toulnustouc Dam, Canadian Consulting Engineer}}

The plant entered service four months ahead of schedule on 1 July 2005.{{sfn|La centrale de Toulnustouc inaugurée}}

The Toulnustouc hydroelectric plant was officially inaugurated on 18 August 2005 by Quebec Premier Jean Charest and Thierry Vandal, CEO of Hydro-Québec.{{sfn|Toulnustouc hydroelectric power project, VINCI}}

The dam is {{convert|76|m}} high, with an effective height of {{convert|72.3|m}} and length of {{convert|570|m}}.{{sfn|Toulnustouc, Barrage de la}}

A spillway with a capacity of {{convert|2400|m3/s}} is used to release excess inflow and to maintain a flow of at least {{convert|3|m3/s}} in the river downstream from the dam.{{sfn|Aménagement hydroélectrique de la Toulnustouc|p=11}}

The dam structure is concrete face rockfill using materials from the spillway excavations, with impermeability provided by the concrete face slab.

This was an innovative choice for the Nordic environment with its large temperature variations and ice loads in winter.{{sfn|Toulnustouc Dam, Canadian Consulting Engineer}}

Submersible tiltmeters were installed along two cross-sectional lines on the dam and the south dike to measure slab deflection so that Hydro-Québec could confirm that any structural movement was within the acceptable range.{{sfn|Holzhausen|Thivierge|2005}}

Leakage is very low, at around {{convert|10|-|15|L/s}}.{{sfn|Toulnustouc Dam, Canadian Consulting Engineer}}

The south dyke is in a valley about {{convert|500|m}} southwest of the main dam, and holds back the reservoir in that area.{{sfn|Toulnustouc Dam, Canadian Consulting Engineer}}

The dyke is {{convert|45|m}} high.{{sfn|Aménagement hydroélectrique de la Toulnustouc|p=11}}

A tunnel from the end of the south dyke carries water to the hydroelectric plant, which is just below PK55 on the river.{{sfn|Aménagement hydroélectrique de la Toulnustouc|p=12}}

The supply tunnel is {{convert|9.8|km}} long.{{sfn|Rapport d’analyse environnementale...|p=2}}

The Toulnustouc generating station is on the Toulnustouc River in the Manicouagan watershed.

It has an installed capacity of 526 MW from two generating units.

The hydraulic head is {{convert|152|m}}.{{sfn|Hydroelectric Generating Stations as at January 1st, 2019}}

The plant produces 2,660 GW/h annually.{{sfn|Toulnustouc hydroelectric power project, VINCI}}

The discharge channel to the river is {{convert|1.2|km}} long, and required excavation of {{convert|93000|m3}} of overburden and {{convert|67000|m3}} of rock.

A geomembrane covered by {{convert|35000|m3}} of stone stabilizes the slopes and bottom of the discharge channel.{{sfn|Toulnustouc hydroelectric power project, VINCI}}

{{notes}}{{reflist|30em}}

{{refbegin}}

• {{citation |url=https://www.bibliotheque.assnat.qc.ca/DepotNumerique_v2/AffichageFichier.aspx?idf=150067 |accessdate=2019-09-05

|title=Aménagement hydroélectrique de la Toulnustouc |ref={{harvid|Aménagement hydroélectrique de la Toulnustouc}} |date=May 2006 |publisher=Hydro-Québec}}

• {{citation |url=https://www.waterpowermagazine.com/features/featuremonitoring-movements-at-toulnustouc/ |accessdate=2019-09-05

|last1=Holzhausen |first1=Gary R |first2=Stéphane-Éric |last2=Thivierge |title=Monitoring movements at Toulnustouc |date=17 May 2005 |journal=Water Power}}

• {{citation |url=http://www.hydroquebec.com/generation/centrale-hydroelectrique.html |accessdate=2019-09-05

|title=Hydroelectric Generating Stations as at January 1st, 2019 |ref={{harvid|Hydroelectric Generating Stations as at January 1st, 2019}} |publisher=Hydro-Québec}}

• {{citation |url=https://ici.radio-canada.ca/nouvelle/265872/toulnustouc-inauguration |language=fr |accessdate=2019-09-05

|title=La centrale de Toulnustouc inaugurée |publisher=Radio-Canada |ref={{harvid|La centrale de Toulnustouc inaugurée}} |date=18 August 2005}}

• {{citation |url=http://www.environnement.gouv.qc.ca/evaluations/decret/toulnustouc.pdf |accessdate=2019-09-05|ref={{harvid|Rapport d’analyse environnementale...}} |language=fr

|title=Rapport d'analyse environnementale, Projet d'aménagement hydroélectrique de la rivière Toulnustouc |date=18 June 2001 |publisher=Gouvernement du Québec}}

• {{citation |url=https://www.ledevoir.com/economie/88491/en-bref-la-centrale-de-toulnustouc-voit-le-jour |accessdate=2019-09-05 |language=fr

|title=En bref - La centrale de Toulnustouc voit le jour |ref={{harvid|En bref - La centrale de Toulnustouc voit le jour}} |date=18 August 2005 |journal=Le Devoir}}

• {{citation |url=https://www.cehq.gouv.qc.ca/barrages/detail.asp?no_mef_lieu=X2007557 |accessdate=2019-09-05 |ref={{harvid|Toulnustouc, Barrage de la}}

|title=Toulnustouc, Barrage de la |publisher=Gouvernement du Québec |year= 2019}}

• {{citation |url=https://www.canadianconsultingengineer.com/features/toulnustouc-dam/ |accessdate=2019-09-05|ref={{harvid|Toulnustouc Dam, Canadian Consulting Engineer}}

|title=Toulnustouc Dam |journal=Canadian Consulting Engineer |date=1 October 2006}}

• {{citation |url=https://www.vinci-construction-projets.com/en/realisations/amenagement-hydroelectrique-de-toulnustuc/ |accessdate=2019-09-05

|title=Toulnustouc hydroelectric power project |ref={{harvid|Toulnustouc hydroelectric power project, VINCI}} |publisher=VINCI Construction Grands Projets}}

{{refend}}

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{{DEFAULTSORT:Toulnustouc generating station}}

Category:Hydroelectric power stations in Quebec

Category:Buildings and structures in Côte-Nord

Category:2005 establishments in Quebec

Category:Dams completed in 2005

Category:Hydro-Québec