Limestone Generating Station - Revision history

AJP: Fixed broken link to RCEA paper

2022-10-29T21:25:12Z

Fixed broken link to RCEA paper

← Older revision		Revision as of 16:25, 29 October 2022
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	==References==		==References==
	Manitoba Hydro & the Province of Manitoba, December 2015, ''Regional Cumulative Effects Assessment Phase II: Part II Hydroelectric Development Project Description in the Region of Interest''. Retrieved April 1 2016 from, https://www.hydro.mb.ca/regulatory_affairs/rcea~~/pdf~~/rcea_phase2_part_ii_hydroelectric_development_project_description.pdf		Manitoba Hydro & the Province of Manitoba, December 2015, ''Regional Cumulative Effects Assessment Phase II: Part II Hydroelectric Development Project Description in the Region of Interest''. Retrieved April 1 2016 from, https://www.hydro.mb.ca/docs/regulatory_affairs/pdf/rcea/rcea_phase2_part_ii_hydroelectric_development_project_description.pdf

Rbernier at 14:39, 1 May 2016

2016-05-01T14:39:53Z

← Older revision		Revision as of 09:39, 1 May 2016
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	==Rehabilitation==		==Rehabilitation==
	The facilities built during construction were not totally decommissioned following construction. Several facilities remain and are used for operations or as potential future work areas. There has been some restoration work undertaken in the surrounding borrow areas. The former metal waste disposal ground was decommissioned in 1995.		The facilities built during construction were not totally decommissioned following construction. Several facilities remain and are used for operations or as potential future work areas. There has been some restoration work undertaken in the surrounding borrow areas. The former metal waste disposal ground was decommissioned in 1995.

			==References==
			Manitoba Hydro & the Province of Manitoba, December 2015, ''Regional Cumulative Effects Assessment Phase II: Part II Hydroelectric Development Project Description in the Region of Interest''. Retrieved April 1 2016 from, https://www.hydro.mb.ca/regulatory_affairs/rcea/pdf/rcea_phase2_part_ii_hydroelectric_development_project_description.pdf

Rbernier at 03:49, 11 April 2016

2016-04-11T03:49:38Z

← Older revision		Revision as of 22:49, 10 April 2016
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	==Location==		==Location==
	The Limestone GS is located at a site previously known as Limestone Rapids or Upper Limestone Rapids (Photo 1), upstream of where the Limestone River empties into the Nelson River. It is approximately 14 mi (23 km) immediately downstream of the Long Spruce GS, 34 mi (55 km) from the Town of Gillam and 466 mi (750 km) north of the City of Winnipeg.		The Limestone GS is located at a site previously known as Limestone Rapids or Upper Limestone Rapids (Photo 1), upstream of where the Limestone River empties into the Nelson River. It is approximately 14 mi (23 km) immediately downstream of the Long Spruce GS, 34 mi (55 km) from the Town of Gillam and 466 mi (750 km) north of the City of Winnipeg.


	[[file:Limestone 1.jpg\|thumb\|center\|upright=2.0\|Photo 1: Upper Limestone Rapids Looking Downstream at the North Shore, 1976]]		[[file:Limestone 1.jpg\|thumb\|center\|upright=2.0\|Photo 1: Upper Limestone Rapids Looking Downstream at the North Shore, 1976]]


	==Initial Construction==		==Initial Construction==
	Prior to the commencement of construction on the Limestone GS, a number of supporting infrastructure components were constructed as part of the adjacent Henday CS (see [[HVDC Transmission System]]). A permanent gravel access road and a construction power line were extended from the Long Spruce GS area to the Limestone GS area in the early 1970’s, with the road later becoming PR 290. A rail spur from the Hudson Bay Railway line (now HBR; Canadian National Railway [CNR] at the time) near the community of Bird (now Fox Lake Cree Nation [FLCN]) was also constructed to the Henday CS site. Construction of the Limestone GS Stage I cofferdam began in 1976. However, while the cofferdam construction was underway and nearly complete in 1978 (Photo 2), construction of the Limestone GS was suspended indefinitely by Manitoba Hydro as a result of a lower than expected forecast in the provincial demand for electricity. Cessation of the Limestone GS construction brought to an end the busiest period of electrical development activity ever to occur in Manitoba.		Prior to the commencement of construction on the Limestone GS, a number of supporting infrastructure components were constructed as part of the adjacent Henday CS (see [[HVDC Transmission System]]). A permanent gravel access road and a construction power line were extended from the Long Spruce GS area to the Limestone GS area in the early 1970’s, with the road later becoming PR 290. A rail spur from the Hudson Bay Railway line (now HBR; Canadian National Railway [CNR] at the time) near the community of Bird (now Fox Lake Cree Nation [FLCN]) was also constructed to the Henday CS site. Construction of the Limestone GS Stage I cofferdam began in 1976. However, while the cofferdam construction was underway and nearly complete in 1978 (Photo 2), construction of the Limestone GS was suspended indefinitely by Manitoba Hydro as a result of a lower than expected forecast in the provincial demand for electricity. Cessation of the Limestone GS construction brought to an end the busiest period of electrical development activity ever to occur in Manitoba.


	[[file:Limestone 2.jpg\|thumb\|center\|upright=2.0\|Photo 2: Stage I Cofferdam Construction – 1978]]		[[file:Limestone 2.jpg\|thumb\|center\|upright=2.0\|Photo 2: Stage I Cofferdam Construction – 1978]]


	==Reinitiated Construction==		==Reinitiated Construction==
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	The Stage I cofferdam constructed in 1978 was originally designed to an elevation of 70.0 m above sea level. During the period from 1979 to 1985 this cofferdam was overtopped on two occasions due to high water levels caused by ice jams (Photo 3). This new information led to the requirement to increase the height of the Stage I cofferdam to a nominal elevation of 73.0 m prior to re-commencing construction (Figure 1). The materials for construction came from local areas, rock came from the Limestone River Quarry and the site excavations, granular and impervious materials came from local borrow areas.		The Stage I cofferdam constructed in 1978 was originally designed to an elevation of 70.0 m above sea level. During the period from 1979 to 1985 this cofferdam was overtopped on two occasions due to high water levels caused by ice jams (Photo 3). This new information led to the requirement to increase the height of the Stage I cofferdam to a nominal elevation of 73.0 m prior to re-commencing construction (Figure 1). The materials for construction came from local areas, rock came from the Limestone River Quarry and the site excavations, granular and impervious materials came from local borrow areas.


	[[file:Limestone 3.jpg\|thumb\|center\|upright=2.0\|Photo 3: Nelson River Overtopping the Stage I Cofferdam – 1979]]		[[file:Limestone 3.jpg\|thumb\|center\|upright=2.0\|Photo 3: Nelson River Overtopping the Stage I Cofferdam – 1979]]

			[[File:Limestone Figure 1.jpg\|thumb\|center\|upright=4.0\|Figure 1: Limestone Generating Station during Construction]]
	[[~~file~~:Limestone 4.jpg\|thumb\|center\|upright=4.0\|Figure 1: Limestone Generating Station during Construction]]


	The generating station was constructed in two primary stages, the first being the construction of the north dam, the powerhouse, and the spillway all contained within the Stage I cofferdam (Photo 4). The second stage began with the full closure of the river, the diversion of water through the spillway, and the completion of the south dam across the river (Photo 5). Following five years of construction activity the first unit went into service in 1990, with the station becoming fully operational by 1992 when the tenth and final unit went into service.		The generating station was constructed in two primary stages, the first being the construction of the north dam, the powerhouse, and the spillway all contained within the Stage I cofferdam (Photo 4). The second stage began with the full closure of the river, the diversion of water through the spillway, and the completion of the south dam across the river (Photo 5). Following five years of construction activity the first unit went into service in 1990, with the station becoming fully operational by 1992 when the tenth and final unit went into service.


	[[file:Limestone 5.jpg\|thumb\|center\|upright=2.0\|Photo 4: Principal Works Construction – 1987]]		[[file:Limestone 5.jpg\|thumb\|center\|upright=2.0\|Photo 4: Principal Works Construction – 1987]]


	[[file:Limestone 6.jpg\|thumb\|center\|upright=2.0\|Photo 5: Stage II Closure – 1989]]		[[file:Limestone 6.jpg\|thumb\|center\|upright=2.0\|Photo 5: Stage II Closure – 1989]]


	==Project Components==		==Project Components==
	===Principal Works===		===Principal Works===
	The generating station spans a total of 0.8 mi (1.3 km ) across the Nelson River and consists of a closecoupled intake/powerhouse with ten generating units, concrete wing walls, two main earthfill dams (north and south) and a seven-bay gated spillway (Photos 6, 7; Map 1).		The generating station spans a total of 0.8 mi (1.3 km ) across the Nelson River and consists of a closecoupled intake/powerhouse with ten generating units, concrete wing walls, two main earthfill dams (north and south) and a seven-bay gated spillway (Photos 6, 7; Map 1).


	[[file:Limestone 7.jpg\|thumb\|center\|upright=2.0\|Photo 6: Limestone Generating Station Area – Looking South]]		[[file:Limestone 7.jpg\|thumb\|center\|upright=2.0\|Photo 6: Limestone Generating Station Area – Looking South]]


	[[file:Limestone 8.jpg\|thumb\|center\|upright=2.0\|Photo 7: Limestone Generating Station – 2009]]		[[file:Limestone 8.jpg\|thumb\|center\|upright=2.0\|Photo 7: Limestone Generating Station – 2009]]


	[[File:Limestone Map 1.jpg\|thumb\|center\|upright=4.0\|Map 1: Limestone Generating Station General Arrangement]]		[[File:Limestone Map 1.jpg\|thumb\|center\|upright=4.0\|Map 1: Limestone Generating Station General Arrangement]]


	===Project Data===		===Project Data===

Rbernier at 01:50, 11 April 2016

2016-04-11T01:50:23Z

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	* control works to divert the Churchill River into the Nelson River via the Burntwood River; and		* control works to divert the Churchill River into the Nelson River via the Burntwood River; and
	* control works to regulate the outflow of Lake Winnipeg into the Nelson River.		* control works to regulate the outflow of Lake Winnipeg into the Nelson River.


	The second phase of development included the Long Spruce Generating Station (GS) which was Manitoba Hydro’s fourth generating station built on the Nelson River. The third phase of development included the Limestone GS.		The second phase of development included the Long Spruce Generating Station (GS) which was Manitoba Hydro’s fourth generating station built on the Nelson River. The third phase of development included the Limestone GS.
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	==~~Generating Station~~ Components==		==Project Components==
	===Principal Works===		===Principal Works===
	The generating station spans a total of 0.8 mi (1.3 km ) across the Nelson River and consists of a closecoupled intake/powerhouse with ten generating units, concrete wing walls, two main earthfill dams (north and south) and a seven-bay gated spillway (Photos 6, 7; Map 1).		The generating station spans a total of 0.8 mi (1.3 km ) across the Nelson River and consists of a closecoupled intake/powerhouse with ten generating units, concrete wing walls, two main earthfill dams (north and south) and a seven-bay gated spillway (Photos 6, 7; Map 1).
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	** Flooded Area: 0.8 mi2 (2.1 km2)		** Flooded Area: 0.8 mi2 (2.1 km2)

			===Transmission Components===
			In conjunction with the construction of the Limestone GS two transmission projects were undertaken, and are described below.

			====Related Transmission====
			A 25 mi (40 km) 138 kV transmission line was built in 1989 from the Radisson Converter Station to the Limestone GS to act as an emergency backup to the generating station.

			====Generation Outlet Transmission====
			The Limestone GS outlet transmission consists of five 138 kV transmission lines built in 1990 from the Limestone GS to the existing Henday Converter Station. This allowed the power to be moved from the Limestone GS onto the High Voltage Direct Current (HVdc) transmission system to southern Manitoba.

	==Mitigation and Rehabilitation==		==Mitigation and Rehabilitation==
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	* Life rings are provided at the spillway; and		* Life rings are provided at the spillway; and
	* Warning signs are provided (in English and Cree) at site to warn the public of: dangerous swift moving waters, steep drop off, overhead power lines, stay off Ice, falling ice, slippery rocks, and rapidly changing water conditions.		* Warning signs are provided (in English and Cree) at site to warn the public of: dangerous swift moving waters, steep drop off, overhead power lines, stay off Ice, falling ice, slippery rocks, and rapidly changing water conditions.


	Water Regime: The Limestone GS is operated as a run-of-river generating station with flow patterns matching water releases from the Long Spruce GS upstream, which are driven by water releases at the Kettle GS further upstream. The Kettle GS is operated with a daily and weekly cycling pattern that allows Manitoba Hydro to match energy production to consumption patterns. For more details on the Limestone GS, the Long Spruce GS, and the Kettle GS operations and their effects on the water regime, see Water Regime, Sections 4.3.4.3 and 4.3.4.4.		Water Regime: The Limestone GS is operated as a run-of-river generating station with flow patterns matching water releases from the Long Spruce GS upstream, which are driven by water releases at the Kettle GS further upstream. The Kettle GS is operated with a daily and weekly cycling pattern that allows Manitoba Hydro to match energy production to consumption patterns. For more details on the Limestone GS, the Long Spruce GS, and the Kettle GS operations and their effects on the water regime, see Water Regime, Sections 4.3.4.3 and 4.3.4.4.

	License: Manitoba Hydro operates the Limestone GS in accordance with a Province of Manitoba Water Power Act license. For further information see the Manitoba Government Water Power Licensing website at: http://www.gov.mb.ca/waterstewardship/licensing/water_power_licensing.html.		License: Manitoba Hydro operates the Limestone GS in accordance with a Province of Manitoba Water Power Act license. For further information see the Manitoba Government Water Power Licensing website at: http://www.gov.mb.ca/waterstewardship/licensing/water_power_licensing.html.

	~~==Transmission Components==~~
	~~In conjunction with the construction of the Limestone GS two transmission projects were undertaken, and are described below.~~

	~~===Related Transmission===~~
	~~A 25 mi (40 km) 138 kV transmission line was built in 1989 from the Radisson Converter Station to the Limestone GS to act as an emergency backup to the generating station.~~

	~~===Generation Outlet Transmission===~~
	The Limestone GS outlet transmission consists of five 138 kV transmission lines built in 1990 from the Limestone GS to the existing Henday Converter Station. This allowed the power to be moved from the Limestone GS onto the High Voltage Direct Current (HVdc) transmission system to southern Manitoba.

	==Rehabilitation==		==Rehabilitation==
	The facilities built during construction were not totally decommissioned following construction. Several facilities remain and are used for operations or as potential future work areas. There has been some restoration work undertaken in the surrounding borrow areas. The former metal waste disposal ground was decommissioned in 1995.		The facilities built during construction were not totally decommissioned following construction. Several facilities remain and are used for operations or as potential future work areas. There has been some restoration work undertaken in the surrounding borrow areas. The former metal waste disposal ground was decommissioned in 1995.


	~~[[File:Limestone 1.jpg\|400px]]~~
	~~[[File:Limestone 2.jpg\|400px]]~~
	~~[[File:Limestone 3.jpg\|400px]]~~
	~~[[File:Limestone 4.jpg\|400px]]~~
	~~[[File:Limestone 5.jpg\|400px]]~~
	~~[[File:Limestone 6.jpg\|400px]]~~
	~~[[File:Limestone 7.jpg\|400px]]~~
	~~[[File:Limestone 8.jpg\|400px]]~~
	~~[[File:Limestone 9.jpg\|400px]]~~

Rbernier at 01:44, 11 April 2016

2016-04-11T01:44:58Z

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Rbernier at 01:59, 9 April 2016

2016-04-09T01:59:05Z

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Abrawerman: Created page with " - Limestone Generating Station"

2016-04-07T18:43:47Z

Created page with " - Limestone Generating Station"

New page

- Limestone Generating Station

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