Decommissioning - Revision history

Grichards@gfnet.com at 21:25, 28 March 2024

2024-03-28T21:25:56Z

← Older revision		Revision as of 21:25, 28 March 2024
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	Beginning in the early 1600’s and into the 1900’s, thousands of dams were built to provide energy for grain and lumber mills, foundries. Some of these structures also produced electricity and facilitated transportation. Most of these dams were [[Low Head Dams\|low-head dams]]. Many of these dams have outlived their design life and are no longer operating or providing the benefits they once were and are at risk of failing. [[Low Head Dams\|Low head dams]] bar fish and other aquatic organisms from moving upstream, affecting upstream habitats and water quality, and are also drowning hazards for boaters and swimmers.		Beginning in the early 1600’s and into the 1900’s, thousands of dams were built to provide energy for grain and lumber mills, foundries. Some of these structures also produced electricity and facilitated transportation. Most of these dams were [[Low Head Dams\|low-head dams]]. Many of these dams have outlived their design life and are no longer operating or providing the benefits they once were and are at risk of failing. [[Low Head Dams\|Low head dams]] bar fish and other aquatic organisms from moving upstream, affecting upstream habitats and water quality, and are also drowning hazards for boaters and swimmers.

	Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful [[benefits]]. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

	“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation. Different strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir.”<ref name="USBR Dam Removal" />		“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation. Different strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir.”<ref name="USBR Dam Removal" />

Alynch@gfnet.com at 17:52, 13 March 2024

2024-03-13T17:52:50Z

← Older revision		Revision as of 17:52, 13 March 2024
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->

	Beginning in the early 1600’s and into the 1900’s, thousands of dams were built to provide energy for grain and lumber mills, foundries. Some of these structures also produced electricity and facilitated transportation. Most of these dams were low-head dams. Many of these dams have outlived their design life and are no longer operating or providing the benefits they once were and are at risk of failing. Low head dams bar fish and other aquatic organisms from moving upstream, affecting upstream habitats and water quality, and are also drowning hazards for boaters and swimmers.		Beginning in the early 1600’s and into the 1900’s, thousands of dams were built to provide energy for grain and lumber mills, foundries. Some of these structures also produced electricity and facilitated transportation. Most of these dams were [[Low Head Dams\|low-head dams]]. Many of these dams have outlived their design life and are no longer operating or providing the benefits they once were and are at risk of failing. [[Low Head Dams\|Low head dams]] bar fish and other aquatic organisms from moving upstream, affecting upstream habitats and water quality, and are also drowning hazards for boaters and swimmers.


	Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful [[benefits]]. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful [[benefits]]. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

MLuna@trccompanies.com at 02:40, 28 February 2024

2024-02-28T02:40:38Z

← Older revision		Revision as of 02:40, 28 February 2024
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->

			Beginning in the early 1600’s and into the 1900’s, thousands of dams were built to provide energy for grain and lumber mills, foundries. Some of these structures also produced electricity and facilitated transportation. Most of these dams were low-head dams. Many of these dams have outlived their design life and are no longer operating or providing the benefits they once were and are at risk of failing. Low head dams bar fish and other aquatic organisms from moving upstream, affecting upstream habitats and water quality, and are also drowning hazards for boaters and swimmers.


	Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful [[benefits]]. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful [[benefits]]. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

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	==Trainings==		==Trainings==
	{{Video Icon}} [[On-Demand Webinar: Introduction to Dam Decommissioning]]		{{Video Icon}} [[On-Demand Webinar: Introduction to Dam Decommissioning]]



	<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->		<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->

Mpollei@gfnet.com at 20:18, 18 July 2023

2023-07-18T20:18:19Z

← Older revision		Revision as of 20:18, 18 July 2023
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	\|caption=		\|caption=
	<!-- Add picture caption -->		<!-- Add picture caption -->
	A dam in the process of decommissioning. ([https://en.wikipedia.org/wiki/Dam_removal Wikipedia])		A dam in the process of decommissioning.
			(Image Source: [https://en.wikipedia.org/wiki/Dam_removal Wikipedia])
	}}		}}

Mpollei@gfnet.com at 17:06, 11 July 2023

2023-07-11T17:06:27Z

← Older revision		Revision as of 17:06, 11 July 2023
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	<noautolinks>==Best Practices Resources==</noautolinks>		<noautolinks>==Best Practices Resources==</noautolinks>
	{{Document Icon}} [[USA Dam Removal Experience and Planning (ENV-2021-97) \| USA Dam Removal Experience and Planning (ENV-2021-97), USBR~~, 2021~~]]		{{Document Icon}} [[USA Dam Removal Experience and Planning (ENV-2021-97) \| USA Dam Removal Experience and Planning (ENV-2021-97), USBR]]
	{{Document Icon}} [[Dam Removal Analysis Guidelines for Sediment \| Dam Removal Analysis Guidelines for Sediment, USBR~~, 2017~~]]		{{Document Icon}} [[Dam Removal Analysis Guidelines for Sediment \| Dam Removal Analysis Guidelines for Sediment, USBR]]

	==Trainings==		==Trainings==

Rmanwaring at 15:51, 14 December 2022

2022-12-14T15:51:25Z

← Older revision		Revision as of 15:51, 14 December 2022
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	<noautolinks>==Best Practices Resources==</noautolinks>		<noautolinks>==Best Practices Resources==</noautolinks>
	{{Document Icon}} [[USA Dam Removal Experience and Planning (ENV-2021-97)\|USA Dam Removal Experience and Planning (ENV-2021-97) ~~(Bureau of Reclamation)~~]]		{{Document Icon}} [[USA Dam Removal Experience and Planning (ENV-2021-97) \| USA Dam Removal Experience and Planning (ENV-2021-97), USBR, 2021]]
	{{Document Icon}} [[Dam Removal Analysis Guidelines for Sediment\|Dam Removal Analysis Guidelines for Sediment ~~(Bureau of Reclamation)~~]]		{{Document Icon}} [[Dam Removal Analysis Guidelines for Sediment \| Dam Removal Analysis Guidelines for Sediment, USBR, 2017]]

	==Trainings==		==Trainings==

Rmanwaring at 20:37, 13 December 2022

2022-12-13T20:37:12Z

← Older revision		Revision as of 20:37, 13 December 2022
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful [[benefits]]. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

	“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation. Different strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir.”<ref name="USBR Dam Removal" />		“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation. Different strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir.”<ref name="USBR Dam Removal" />
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	“During and after dam removal, use flexible decision making that can be adjusted as outcomes from previous management actions and other events become better understood. Agree on the basic framework for monitoring, adaptive management, and decision-making for the overall project and incorporate that framework into the [[sedimentation]] management plan”.<ref name="USBR Dam Removal" />		“During and after dam removal, use flexible decision making that can be adjusted as outcomes from previous management actions and other events become better understood. Agree on the basic framework for monitoring, adaptive management, and decision-making for the overall project and incorporate that framework into the [[sedimentation]] management plan”.<ref name="USBR Dam Removal" />

	“The dynamic [[hydraulics]] and sediment processes involved in dam removal should be monitored and evaluated throughout dam removal and [[Reservoir Drawdown\|reservoir drawdown]] and for the duration of significant impacts. A systematic approach to performance monitoring and data collection can help quantify and evaluate impacts to determine how well the project meets objectives, how the reservoir and river are responding to the dam removal, and when adaptive measures may be needed. As noted in USSD 2015, ‘Monitoring can also help inform adaptive management plans by reducing uncertainty associated with dam decommissioning projects, communicate project results to stakeholders ~~<br>~~ and the public, and advance our understanding of the results of restoration actions for future projects’”.<ref name="USBR Dam Removal" />		“The dynamic [[hydraulics]] and sediment processes involved in dam removal should be monitored and evaluated throughout dam removal and [[Reservoir Drawdown \| reservoir drawdown]] and for the duration of significant impacts. A systematic approach to performance monitoring and data collection can help quantify and evaluate impacts to determine how well the project meets objectives, how the reservoir and river are responding to the dam removal, and when adaptive measures may be needed. As noted in USSD 2015, ‘Monitoring can also help inform adaptive management plans by reducing uncertainty associated with dam decommissioning projects, communicate project results to stakeholders and the public, and advance our understanding of the results of restoration actions for future projects’”.<ref name="USBR Dam Removal" />

	==Best Practices Resources==		<noautolinks>==Best Practices Resources==</noautolinks>
	{{Document Icon}} [[USA Dam Removal Experience and Planning (ENV-2021-97)\|USA Dam Removal Experience and Planning (ENV-2021-97) (Bureau of Reclamation)]]		{{Document Icon}} [[USA Dam Removal Experience and Planning (ENV-2021-97)\|USA Dam Removal Experience and Planning (ENV-2021-97) (Bureau of Reclamation)]]
	{{Document Icon}} [[Dam Removal Analysis Guidelines for Sediment\|Dam Removal Analysis Guidelines for Sediment (Bureau of Reclamation)]]		{{Document Icon}} [[Dam Removal Analysis Guidelines for Sediment\|Dam Removal Analysis Guidelines for Sediment (Bureau of Reclamation)]]

Grichards at 23:24, 23 November 2022

2022-11-23T23:24:20Z

← Older revision		Revision as of 23:24, 23 November 2022
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	Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

	“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project ~~implementation”~~.~~<ref name="USBR Dam Removal" />~~		“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation. Different strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir.”<ref name="USBR Dam Removal" />

	~~“Different~~ strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir. ~~If the dam is still serving a useful purpose, then developing either water management strategies one or more [[replacement]] structures might be needed to continue to serve that purpose”.~~<ref name="USBR Dam Removal" />

	“Planning for dam removal generally includes these steps: define the purpose and need for the action; identify and engage stakeholders; assess the present downstream safety or environmental hazard risks; formulate alternatives, including removing the dam or repairing, improving, or maintaining the dam; assess environmental impacts under a range of reasonable alternatives; assess economic and financial costs and benefits under a range of reasonable alternatives”.<ref name="USBR Dam Removal" />		“Planning for dam removal generally includes these steps: define the purpose and need for the action; identify and engage stakeholders; assess the present downstream safety or environmental hazard risks; formulate alternatives, including removing the dam or repairing, improving, or maintaining the dam; assess environmental impacts under a range of reasonable alternatives; assess economic and financial costs and benefits under a range of reasonable alternatives”.<ref name="USBR Dam Removal" />

Grichards at 23:20, 23 November 2022

2022-11-23T23:20:04Z

← Older revision		Revision as of 23:20, 23 November 2022
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	Dam owners and project stakeholders ~~continually~~ weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders should weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

	“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation”.<ref name="USBR Dam Removal" />		“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation”.<ref name="USBR Dam Removal" />
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	“During and after dam removal, use flexible decision making that can be adjusted as outcomes from previous management actions and other events become better understood. Agree on the basic framework for monitoring, adaptive management, and decision-making for the overall project and incorporate that framework into the [[sedimentation]] management plan”.<ref name="USBR Dam Removal" />		“During and after dam removal, use flexible decision making that can be adjusted as outcomes from previous management actions and other events become better understood. Agree on the basic framework for monitoring, adaptive management, and decision-making for the overall project and incorporate that framework into the [[sedimentation]] management plan”.<ref name="USBR Dam Removal" />

	“The dynamic [[hydraulics]] and sediment processes involved in dam removal should be monitored and evaluated throughout dam removal and reservoir drawdown and for the duration of significant impacts. A systematic approach to performance monitoring and data collection can help quantify and evaluate impacts to determine how well the project meets objectives, how the reservoir and river are responding to the dam removal, and when adaptive measures may be needed. As noted in USSD 2015, ‘Monitoring can also help inform adaptive management plans by reducing uncertainty associated with dam decommissioning projects, communicate project results to stakeholders <br> and the public, and advance our understanding of the results of restoration actions for future projects’”.<ref name="USBR Dam Removal" />		“The dynamic [[hydraulics]] and sediment processes involved in dam removal should be monitored and evaluated throughout dam removal and [[Reservoir Drawdown\|reservoir drawdown]] and for the duration of significant impacts. A systematic approach to performance monitoring and data collection can help quantify and evaluate impacts to determine how well the project meets objectives, how the reservoir and river are responding to the dam removal, and when adaptive measures may be needed. As noted in USSD 2015, ‘Monitoring can also help inform adaptive management plans by reducing uncertainty associated with dam decommissioning projects, communicate project results to stakeholders <br> and the public, and advance our understanding of the results of restoration actions for future projects’”.<ref name="USBR Dam Removal" />

	==Best Practices Resources==		==Best Practices Resources==

Grichards at 01:09, 18 November 2022

2022-11-18T01:09:14Z

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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	Dam owners and project stakeholders continually weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or environmental concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>		Dam owners and project stakeholders continually weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downstream water temperatures, or a diminished ability to reduce both upstream and downstream flooding. “When the benefits provided by a dam have diminished over time, dam removal may be a less expensive alternative to continued maintenance and repair, or upgrades needed to address new dam safety or [[environmental]] concerns”.<ref name="USBR Dam Removal">[[USA Dam Removal Experience and Planning (ENV-2021-97)\|ENV-2021-97 USA Dam Removal Experience and Planning, USBR, 2021]]</ref>

	“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, environment, and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation”.<ref name="USBR Dam Removal" />		“The level of effort needed to design a dam removal should be based on the size of the dam and the level of risk to the public, [[environment]], and downstream property and infrastructure. The removal of a small weir may not require a detailed design. However, the removal of a large dam would require a detailed design to help ensure the safe and successful project implementation”.<ref name="USBR Dam Removal" />

	“Different strategies are required for removing dams based on their purpose, structural design, reservoir size, and the materials trapped within the reservoir. If the dam is still serving a useful purpose, then developing either water management strategies one or more replacement structures might be needed to continue to serve that purpose”.<ref name="USBR Dam Removal" />		“Different strategies are required for removing dams based on their purpose, [[structural]] design, reservoir size, and the materials trapped within the reservoir. If the dam is still serving a useful purpose, then developing either water management strategies one or more [[replacement]] structures might be needed to continue to serve that purpose”.<ref name="USBR Dam Removal" />

	“Planning for dam removal generally includes these steps: define the purpose and need for the action; identify and engage stakeholders; assess the present downstream safety or environmental hazard risks; formulate alternatives, including removing the dam or repairing, improving, or maintaining the dam; assess environmental impacts under a range of reasonable alternatives; assess economic and financial costs and benefits under a range of reasonable alternatives”.<ref name="USBR Dam Removal" />		“Planning for dam removal generally includes these steps: define the purpose and need for the action; identify and engage stakeholders; assess the present downstream safety or environmental hazard risks; formulate alternatives, including removing the dam or repairing, improving, or maintaining the dam; assess environmental impacts under a range of reasonable alternatives; assess economic and financial costs and benefits under a range of reasonable alternatives”.<ref name="USBR Dam Removal" />

	“During and after dam removal, use flexible decision making that can be adjusted as outcomes from previous management actions and other events become better understood. Agree on the basic framework for monitoring, adaptive management, and decision-making for the overall project and incorporate that framework into the sedimentation management plan”.<ref name="USBR Dam Removal" />		“During and after dam removal, use flexible decision making that can be adjusted as outcomes from previous management actions and other events become better understood. Agree on the basic framework for monitoring, adaptive management, and decision-making for the overall project and incorporate that framework into the [[sedimentation]] management plan”.<ref name="USBR Dam Removal" />

	“The dynamic hydraulics and sediment processes involved in dam removal should be monitored and evaluated throughout dam removal and reservoir drawdown and for the duration of significant impacts. A systematic approach to performance monitoring and data collection can help quantify and evaluate impacts to determine how well the project meets objectives, how the reservoir and river are responding to the dam removal, and when adaptive measures may be needed. As noted in USSD 2015, ‘Monitoring can also help inform adaptive management plans by reducing uncertainty associated with dam decommissioning projects, communicate project results to stakeholders <br> and the public, and advance our understanding of the results of restoration actions for future projects’”.<ref name="USBR Dam Removal" />		“The dynamic [[hydraulics]] and sediment processes involved in dam removal should be monitored and evaluated throughout dam removal and reservoir drawdown and for the duration of significant impacts. A systematic approach to performance monitoring and data collection can help quantify and evaluate impacts to determine how well the project meets objectives, how the reservoir and river are responding to the dam removal, and when adaptive measures may be needed. As noted in USSD 2015, ‘Monitoring can also help inform adaptive management plans by reducing uncertainty associated with dam decommissioning projects, communicate project results to stakeholders <br> and the public, and advance our understanding of the results of restoration actions for future projects’”.<ref name="USBR Dam Removal" />

	==Best Practices Resources==		==Best Practices Resources==