Stepped Chute Spillways - Revision history

Jeremy.franz@state.co.us at 23:44, 22 January 2025

2025-01-22T23:44:20Z

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	\|image= SteppedChuteSpillwayModel.jpg		\|image= SteppedChuteSpillwayModel.jpg\|link=https://damtoolbox.org/images/4/4d/SteppedChuteSpillwayModel.jpg
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	\|caption= Physical model of the stepped spillway for the Gross Reservoir Expansion project.		\|caption= Physical model of the stepped spillway for the Gross Reservoir Expansion project.

Jeremy.franz@state.co.us at 21:59, 22 January 2025

2025-01-22T21:59:29Z

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	[[Category:Chute Spillways]]		[[Category:Chute Spillways]]
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			{{Picture
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			\|image= SteppedChuteSpillwayModel.jpg
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			\|caption= Physical model of the stepped spillway for the Gross Reservoir Expansion project.
			(Image Source: CO DWR)
			}}<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->

	Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways\|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete\|reinforced concrete]] spillway chute and RCC [[Overtopping Protection\|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic [[Energy Dissipation\|energy dissipation]] via the steps, which can reduce the size and type of the terminal structure. However, the kinetic [[Energy Dissipation\|energy dissipation]] potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) \| Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>		Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways\|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete\|reinforced concrete]] spillway chute and RCC [[Overtopping Protection\|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic [[Energy Dissipation\|energy dissipation]] via the steps, which can reduce the size and type of the terminal structure. However, the kinetic [[Energy Dissipation\|energy dissipation]] potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) \| Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>

Mpollei@gfnet.com at 19:22, 11 July 2023

2023-07-11T19:22:40Z

← Older revision		Revision as of 19:22, 11 July 2023
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations)\|Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR~~, 2022~~]]		{{Document Icon}} [[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations)\|Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR]]
	{{Document Icon}} [[Design and Construction Considerations for Hydraulic Structures: Roller-Compacted Concrete, 2nd Edition \| Design and Construction Considerations for Hydraulic Structures: Roller-Compacted Concrete, 2nd Edition), USBR~~, 2017~~]]		{{Document Icon}} [[Design and Construction Considerations for Hydraulic Structures: Roller-Compacted Concrete, 2nd Edition \| Design and Construction Considerations for Hydraulic Structures: Roller-Compacted Concrete, 2nd Edition), USBR]]
	{{Document Icon}} [[Roller-Compacted Concrete (EM 1110-2-2006) \| Roller-Compacted Concrete (EM 1110-2-2006), USACE~~, 2000~~]]		{{Document Icon}} [[Roller-Compacted Concrete (EM 1110-2-2006) \| Roller-Compacted Concrete (EM 1110-2-2006), USACE]]
	{{Document Icon}} [[Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures (TR REMR-CS-53) \| Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures (TR REMR-CS-53), USACE~~, 1997~~]]		{{Document Icon}} [[Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures (TR REMR-CS-53) \| Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures (TR REMR-CS-53), USACE]]

	==Trainings==		==Trainings==

Grichards at 00:00, 17 March 2023

2023-03-17T00:00:36Z

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	__NOTOC__		__NOTOC__
	[[Category:~~Uncontrolled~~ Spillways]]		[[Category:Chute Spillways]]
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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 -->

Grichards at 23:51, 16 March 2023

2023-03-16T23:51:19Z

← Older revision		Revision as of 23:51, 16 March 2023
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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 -->

	Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways\|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete\|reinforced concrete]] spillway chute and RCC [[Overtopping Protection\|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic [[Energy Dissipation\|energy dissipation]] via the steps, which can reduce the size and type of the terminal structure. However, the kinetic energy dissipation potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) \| Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>		Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways\|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete\|reinforced concrete]] spillway chute and RCC [[Overtopping Protection\|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic [[Energy Dissipation\|energy dissipation]] via the steps, which can reduce the size and type of the terminal structure. However, the kinetic [[Energy Dissipation\|energy dissipation]] potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) \| Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>


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

Grichards at 23:50, 16 March 2023

2023-03-16T23:50:53Z

← Older revision		Revision as of 23:50, 16 March 2023
Line 4:		Line 4:
	<!-- 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 -->

	Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways\|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete\|reinforced concrete]] spillway chute and RCC [[Overtopping Protection\|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic energy dissipation via the steps, which can reduce the size and type of the terminal structure. However, the kinetic energy dissipation potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) \| Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>		Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways\|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete\|reinforced concrete]] spillway chute and RCC [[Overtopping Protection\|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic [[Energy Dissipation\|energy dissipation]] via the steps, which can reduce the size and type of the terminal structure. However, the kinetic energy dissipation potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) \| Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>


	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations)\|Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]		{{Document Icon}} [[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations)\|Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]
			{{Document Icon}} [[Design and Construction Considerations for Hydraulic Structures: Roller-Compacted Concrete, 2nd Edition \| Design and Construction Considerations for Hydraulic Structures: Roller-Compacted Concrete, 2nd Edition), USBR, 2017]]
			{{Document Icon}} [[Roller-Compacted Concrete (EM 1110-2-2006) \| Roller-Compacted Concrete (EM 1110-2-2006), USACE, 2000]]
			{{Document Icon}} [[Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures (TR REMR-CS-53) \| Applications of Roller-Compacted Concrete in Rehabilitation and Replacement of Hydraulic Structures (TR REMR-CS-53), USACE, 1997]]

			==Trainings==
			{{Video Icon}} [[On-Demand Webinar: Stepped Chute Spillway Design for Embankment Dams]]
			{{Video Icon}} [[On-Demand Webinar: RCC Applications in Dam Engineering - What We Have Learned and What's New]]
			{{Video Icon}} [[On-Demand Webinar: Roller Compacted Concrete - Design and Construction of Water Control Structures]]

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Grichards: Created page with "NOTOC Category:Uncontrolled Spillways ---- Stepped chute spillways are suited for service and auxiliary spillways. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift construction methods, resulting in offsets on..."

2023-03-16T23:48:29Z

Created page with "__NOTOC__ Category:Uncontrolled Spillways ----  Stepped chute spillways are suited for service and auxiliary spillways. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift construction methods, resulting in offsets on..."

New page

__NOTOC__
[[Category:Uncontrolled Spillways]]
----


Stepped chute [[spillways]] are suited for service and [[Auxiliary Spillways|auxiliary spillways]]. Stepped spillways refer to the stepped chute portion of the spillway and have primarily been used with roller-compacted concrete (RCC) dams, which take advantage of the RCC lift [[construction]] methods, resulting in offsets on the downstream dam face, creating the spillway steps. These steps can be formed or unformed RCC or capped with conventional concrete. A chute-type crest (flat), along with straight or curved ogee crests, are typically used in combination with stepped chutes. Other applications have involved incorporating both smooth flow surfaces and steps into a [[Reinforced Concrete|reinforced concrete]] spillway chute and RCC [[Overtopping Protection|overtopping protection]] for an earth dam. A consideration for a stepped spillway involves the potential kinetic energy dissipation via the steps, which can reduce the size and type of the terminal structure. However, the kinetic energy dissipation potential may be reduced as flow depth (relative to the step size) increases (due to skimming flows). Also, consideration should be given to evaluating the [[cavitation]] potential. Examples of stepped spillways include the service spillway at Maricopa Water District’s Camp Dyer Diversion Dam (concrete), the auxiliary spillway (Joint Federal Project) at Reclamation’s Folsom Dam (composite), and the service spillway at Reclamation’s Upper Stillwater Dam (concrete). <ref name="DS14">[[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations) | Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]</ref>

==Best Practices Resources==
{{Document Icon}} [[Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations)|Design Standards No. 14: Appurtenant Structures for Dams (Ch. 3: General Spillway Design Considerations), USBR, 2022]]


{{Citations}}


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