Drop Spillways - Revision history

Mpollei@gfnet.com at 19:23, 11 July 2023

2023-07-11T19:23:12Z

← Older revision		Revision as of 19:23, 11 July 2023
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	<noautolinks>==Best Practices Resources==</noautolinks>		<noautolinks>==Best Practices Resources==</noautolinks>
	{{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]]

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Rmanwaring at 00:03, 14 December 2022

2022-12-14T00:03:45Z

← Older revision		Revision as of 00:03, 14 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 -->
	Drop inlet [[spillways]] (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and [[Auxiliary Spillways\|auxiliary spillways]].<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, ~~2014~~]]</ref>		Drop inlet [[spillways]] (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and [[Auxiliary Spillways \| auxiliary spillways]].<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>

	==Morning Glory Control Structures==		==Morning Glory Control Structures==

Rmanwaring: /* Best Practices Resources */

2022-12-13T23:45:24Z

Best Practices Resources

← Older revision		Revision as of 23:45, 13 December 2022
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	==Other Drop Inlet Spillways==		==Other Drop Inlet Spillways==

	This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. This spillway is very similar to an [[Outlet Works\|outlet works]] intake tower and may be in combination with an outlet works. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />		This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and [[Composite Dams\|composite dams]], and it can be gated or ungated. This spillway is very similar to an [[Outlet Works\|outlet works]] intake tower and may be in combination with an [[Outlet Works\|outlet works]]. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of [[Spillway Control Structures\|spillway control structures]]. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />

	==Best Practices Resources==		<noautolinks>==Best Practices Resources==</noautolinks>
	{{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) ~~(Bureau of Reclamation~~]]		{{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]]

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Grichards at 22:59, 2 December 2022

2022-12-02T22:59:17Z

← Older revision		Revision as of 22:59, 2 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 -->
	Drop inlet [[spillways]] (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and auxiliary spillways.<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, 2014]]</ref>		Drop inlet [[spillways]] (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and [[Auxiliary Spillways\|auxiliary spillways]].<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, 2014]]</ref>

	==Morning Glory Control Structures==		==Morning Glory Control Structures==

	This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse [[hydraulics]] in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />		This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and [[Composite Dams\|composite dams]], and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse [[hydraulics]] in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of [[Spillway Control Structures\|spillway control structures]]. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />

	==Other Drop Inlet Spillways==		==Other Drop Inlet Spillways==

	This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. This spillway is very similar to an outlet works intake tower and may be in combination with an outlet works. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />		This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. This spillway is very similar to an [[Outlet Works\|outlet works]] intake tower and may be in combination with an outlet works. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />

	~~==Examples==~~
	~~{{Website Icon}}~~
	==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) (Bureau of Reclamation]]		{{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) (Bureau of Reclamation]]
	~~==Trainings==~~
	~~{{Video Icon}}~~

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Grichards at 06:48, 18 November 2022

2022-11-18T06:48:08Z

← Older revision		Revision as of 06:48, 18 November 2022
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	__NOTOC__		__NOTOC__
			[[Category:Uncontrolled 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 -->
	Drop inlet spillways (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and auxiliary spillways.<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, 2014]]</ref>		Drop inlet [[spillways]] (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and auxiliary spillways.<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, 2014]]</ref>

	==Morning Glory Control Structures==		==Morning Glory Control Structures==

	This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />		This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse [[hydraulics]] in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />

	==Other Drop Inlet Spillways==		==Other Drop Inlet Spillways==

Rmanwaring at 22:56, 30 September 2022

2022-09-30T22:56:00Z

← Older revision		Revision as of 22:56, 30 September 2022
Line 2:		Line 2:
	----		----
	<!-- 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 -->
	~~'''"~~Drop inlet spillways ~~-'''~~ including morning glory (shaft) and other drop inlet control structures – These types of control structures are suited for service and auxiliary spillways.<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, 2014]]</ref>		Drop inlet spillways (including morning glory / shaft and other drop inlet control structures): These types of control structures are suited for service and auxiliary spillways.<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, 2014]]</ref>
	*''"Morning ~~glory control structures -''~~ This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />
	*''"Other ~~drop inlet spillways -''~~ This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. This spillway is very similar to an outlet works intake tower and may be in combination with an outlet works. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />		==Morning Glory Control Structures==

			This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />

			==Other Drop Inlet Spillways==

			This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. This spillway is very similar to an outlet works intake tower and may be in combination with an outlet works. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />

	==Examples==		==Examples==

Rmanwaring at 22:51, 30 September 2022

2022-09-30T22:51:02Z

← Older revision		Revision as of 22:51, 30 September 2022
Line 2:		Line 2:
	----		----
	<!-- 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 -->
	[~~Paragraph here~~]		'''"Drop inlet spillways -''' including morning glory (shaft) and other drop inlet control structures – These types of control structures are suited for service and auxiliary spillways.<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, 2014]]</ref>
			*''"Morning glory control structures -'' This structure is a type of drop inlet spillway. This type of control structure should be considered when there is very limited space and there is adequate rock foundation. The morning glory spillway (sometimes referred to as a “shaft” spillway) has the potential of small to moderate discharge capacity and is used with conduit and tunnel conveyance features. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. As hydraulic head on the crest increases, the flow transitions from crest control to throat (orifice) control and, in some cases, to pipe (pressure) control, resulting in reduced discharge efficiency. Morning glory spillways are typically designed to only operate in the crest control range. Larger discharges could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of morning glory spillways include the service spillways at Reclamation’s Hungry Horse Dam (concrete), Ridgway Dam (embankment), Trinity Dam (embankment), and Owyhee Dam (concrete).<ref name="DS14" />
	==Other ~~Headings~~==		*''"Other drop inlet spillways -'' This type of spillway is most applicable where there is a small amount of space to locate the control structure, there is adequate rock foundation, and the conveyance feature will be a conduit or tunnel. This type of spillway is applicable to concrete, embankment, and composite dams, and it can be gated or ungated. This spillway is very similar to an outlet works intake tower and may be in combination with an outlet works. This spillway has the potential of small discharge capacity. Larger discharges than design levels can result in hydraulic control shifts (crest to orifice and/or orifice to pipe control) that could result in adverse hydraulics in the downstream conduit or tunnel (slug and/or pressure flow). Also, this spillway type may be vulnerable to debris plugging. If heavy debris loads are anticipated during flood events, consider defensive measures to protect the control structure (such as debris booms) or consider other types of spillway control structures. Examples of other drop inlet spillways include the service spillways at Reclamation’s B.F. Sisk Dam (embankment) and Lake Sherburne Dam (embankment).<ref name="DS14" />
	~~[Paragraph here]~~

	==Examples==		==Examples==
	{{Website Icon}}		{{Website Icon}}
	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}}		{{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) (Bureau of Reclamation]]
	==Trainings==		==Trainings==
	{{Video Icon}}		{{Video Icon}}

Rmanwaring: Created page with "NOTOC ---- [Paragraph here] ==Other Headings== [Paragraph here] ==Examples== {{Website Icon}} ==Best Practices Resources== {{Document Icon}} ==Trainings== {{Video Icon}}

Drop Spillways - Revision history

Mpollei@gfnet.com at 19:23, 11 July 2023

Rmanwaring at 00:03, 14 December 2022

Rmanwaring: /* Best Practices Resources */

Grichards at 22:59, 2 December 2022

Grichards at 06:48, 18 November 2022

Rmanwaring at 22:56, 30 September 2022

Rmanwaring at 22:51, 30 September 2022

Rmanwaring: Created page with "__NOTOC__ ---- [Paragraph here] ==Other Headings== [Paragraph here] ==Examples== {{Website Icon}} ==Best Practices Resources== {{Document Icon}} ==Trainings== {{Video Icon}}

Rmanwaring: Created page with "NOTOC ---- [Paragraph here] ==Other Headings== [Paragraph here] ==Examples== {{Website Icon}} ==Best Practices Resources== {{Document Icon}} ==Trainings== {{Video Icon}}