748.7 Bridge Deck and Bridge End Drainage - Revision history

Hoskir: /* 748.7.11 Drain Flumes */ updated per RR 3656

2023-04-19T15:08:14Z

748.7.11 Drain Flumes: updated per RR 3656

← Older revision		Revision as of 10:08, 19 April 2023
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	==748.7.11 Drain Flumes==		==748.7.11 Drain Flumes==

	Drain (Rock) flumes can be used for protecting the sideslopes and channeling water for the case when rock blanket is not required to be extended up to the elevation of the approach slab. This is an economical decision for which both options produce equal performance with respect to bridge end drainage. A Type 1 Rock Ditch Liner with PECG is used for this purpose~~. The pay item for the drain flume complete-in-place as shown on the Standard Plans will be Type 1 Rock Ditch Liner which will include the cost of the PECG~~. The length of drain flume can vary based on the elevation of the rock blanket on the sideslope.		Drain (Rock) flumes can be used for protecting the sideslopes and channeling water for the case when rock blanket is not required to be extended up to the elevation of the approach slab. This is an economical decision for which both options produce equal performance with respect to bridge end drainage. A Type 1 Rock Ditch Liner with PECG is used for this purpose. The length of drain flume can vary based on the elevation of the rock blanket on the sideslope.




	[[Category:748 Hydraulics and Drainage\|748.07]]		[[Category:748 Hydraulics and Drainage\|748.07]]

Smithk: /* 748.7.4 Bridges on a Minor or Low Volume Route */ Per BR, minor clarification

2021-06-30T12:24:21Z

748.7.4 Bridges on a Minor or Low Volume Route: Per BR, minor clarification

← Older revision		Revision as of 07:24, 30 June 2021
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	==748.7.4 Bridges on a Minor or Low Volume Route==		==748.7.4 Bridges on a Minor or Low Volume Route==

	Because concrete approach pavement is not used for bridges on a minor ~~road~~, drain basins are not available as an option for drainage conveyance and other methods must be used. Either rock blanket or drain flumes should be considered for this purpose in order to prevent sideslope erosion.		Because concrete approach pavement is not used for bridges on a minor or low volume route, drain basins are not available as an option for drainage conveyance and other methods must be used. Either rock blanket or drain flumes should be considered for this purpose in order to prevent sideslope erosion.

	==748.7.5 Concrete Spill Slope Protection and Concrete Aprons==		==748.7.5 Concrete Spill Slope Protection and Concrete Aprons==

Smithk: /* 748.7.3 Bridges on a Major Route */

2021-06-29T15:46:54Z

748.7.3 Bridges on a Major Route

← Older revision		Revision as of 10:46, 29 June 2021
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	==748.7.3 Bridges on a Major Route==		==748.7.3 Bridges on a Major Route==

	Because concrete approach pavement is required for bridges on a major route, the available use of drain basins, as needed, and as the only drainage conveyance at the bridge end is sufficient. Drain basins should be provided on the down-grade side of all bridges on major routes. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter, or the roadway is steeply sloped and/or wide, or the it is the critical low side of a superelevated roadway and there is a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved, and is generally shown on the culvert section sheets.		Because concrete approach pavement is required for bridges on a major route, the available use of drain basins, as needed, and as the only drainage conveyance at the bridge end is sufficient. Drain basins should be provided on the down-grade side of all bridges on major routes. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter, or the roadway is steeply sloped and/or wide, or the it is the critical low side of a superelevated roadway and there is a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved and is generally shown on the culvert section sheets.

	==748.7.4 Bridges on a Minor or Low Volume Route==		==748.7.4 Bridges on a Minor or Low Volume Route==

Smithk: Per BR, clarified terminology

2021-06-28T18:41:53Z

Per BR, clarified terminology

← Older revision		Revision as of 13:41, 28 June 2021
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	Bridge end drainage provisions can include concrete spill slope protection and concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [https://www.modot.org/media/16882 Standard Plans 609.40] for details.)		Bridge end drainage provisions can include concrete spill slope protection and concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [https://www.modot.org/media/16882 Standard Plans 609.40] for details.)

	==748.7.3 Bridges on a Major ~~Road~~==		==748.7.3 Bridges on a Major Route==

	Because concrete approach pavement is required for bridges on a major ~~road~~, the available use of drain basins, as needed, and as the only drainage conveyance at the bridge end is sufficient. Drain basins should be provided on the down-grade side of all bridges on major ~~roads~~. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter, or the roadway is steeply sloped and/or wide, or the it is the critical low side of a superelevated roadway and there is a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved, and is generally shown on the culvert section sheets.		Because concrete approach pavement is required for bridges on a major route, the available use of drain basins, as needed, and as the only drainage conveyance at the bridge end is sufficient. Drain basins should be provided on the down-grade side of all bridges on major routes. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter, or the roadway is steeply sloped and/or wide, or the it is the critical low side of a superelevated roadway and there is a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved, and is generally shown on the culvert section sheets.

	==748.7.4 Bridges on a Minor ~~Road~~==		==748.7.4 Bridges on a Minor or Low Volume Route==

	Because concrete approach pavement is not used for bridges on a minor road, drain basins are not available as an option for drainage conveyance and other methods must be used. Either rock blanket or drain flumes should be considered for this purpose in order to prevent sideslope erosion.		Because concrete approach pavement is not used for bridges on a minor road, drain basins are not available as an option for drainage conveyance and other methods must be used. Either rock blanket or drain flumes should be considered for this purpose in order to prevent sideslope erosion.
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	==748.7.6 Drain Basins==		==748.7.6 Drain Basins==

	Drain basins and Type A curbs are used only when necessary (refer to [[:Category:504 Concrete Approach Pavement\|EPG 504 Concrete Approach Pavement]]). When a concrete Bridge Approach Slab (Major ~~Road~~) is included on the plans, and only when required, the roadway items of drain basins and Type A curbs as part of the concrete approach pavement and as shown on [https://www.modot.org/media/16882 Standard Plan 609.40] are also specified on the roadway plans. When a Bridge Approach Slab (Minor ~~Road~~) is used, a method of moving drainage away from the bridge end other than drain basins will be necessary since concrete approach pavements are not used with these bridge approach slabs.		Drain basins and Type A curbs are used only when necessary (refer to [[:Category:504 Concrete Approach Pavement\|EPG 504 Concrete Approach Pavement]]). When a concrete Bridge Approach Slab (Major) is included on the plans, and only when required, the roadway items of drain basins and Type A curbs as part of the concrete approach pavement and as shown on [https://www.modot.org/media/16882 Standard Plan 609.40] are also specified on the roadway plans. When a Bridge Approach Slab (Minor) is used, a method of moving drainage away from the bridge end other than drain basins will be necessary since concrete approach pavements are not used with these bridge approach slabs.

	==748.7.7 Curbs==		==748.7.7 Curbs==

	All bridge approach slabs will have curbs to direct the drainage away from the bridge wings. Bridge approach slabs on major ~~roads~~ will use a 4” Type A curb for the full length of the slab and in accordance with the standard plans. Approach slabs on minor ~~roads~~ will use either a 4” Type A curb or a 4” Type S curb for a partial length of 5’-6” along either the concrete or asphalt slab respectively.		All bridge approach slabs will have curbs to direct the drainage away from the bridge wings. Bridge approach slabs on major routes will use a 4” Type A curb for the full length of the slab and in accordance with the standard plans. Approach slabs on minor and low volume routes will use either a 4” Type A curb or a 4” Type S curb for a partial length of 5’-6” along either the concrete or asphalt slab respectively.

	==748.7.8 Sideslope Drainage Provisions==		==748.7.8 Sideslope Drainage Provisions==

Kleins1: /* 748.7.6 Drain Basins */

2018-10-03T16:44:48Z

748.7.6 Drain Basins

← Older revision		Revision as of 11:44, 3 October 2018
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	==748.7.6 Drain Basins==		==748.7.6 Drain Basins==

	Drain basins and Type A curbs are used only when necessary (refer to [[:Category:504 Concrete Approach Pavement\|EPG 504 Concrete Approach Pavement]]). When a concrete Bridge Approach Slab (Major Road) is included on the plans, and only when required, the roadway items of drain basins and Type A curbs as part of the concrete approach pavement and as shown on [~~http~~://www.modot.org/~~business~~/~~standards_and_specs/documents/60940P.pdf~~ Standard Plan 609.40] are also specified on the roadway plans. When a Bridge Approach Slab (Minor Road) is used, a method of moving drainage away from the bridge end other than drain basins will be necessary since concrete approach pavements are not used with these bridge approach slabs.		Drain basins and Type A curbs are used only when necessary (refer to [[:Category:504 Concrete Approach Pavement\|EPG 504 Concrete Approach Pavement]]). When a concrete Bridge Approach Slab (Major Road) is included on the plans, and only when required, the roadway items of drain basins and Type A curbs as part of the concrete approach pavement and as shown on [https://www.modot.org/media/16882 Standard Plan 609.40] are also specified on the roadway plans. When a Bridge Approach Slab (Minor Road) is used, a method of moving drainage away from the bridge end other than drain basins will be necessary since concrete approach pavements are not used with these bridge approach slabs.

	==748.7.7 Curbs==		==748.7.7 Curbs==

Kleins1: /* 748.7.2 Bridge End Drainage */

2018-10-03T16:44:19Z

748.7.2 Bridge End Drainage

← Older revision		Revision as of 11:44, 3 October 2018
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	The project core team should make recommendations at the bridge field check or on the bridge field check memorandum for handling drainage when submitting bridge survey reports for concurrence by the Bridge Division and the selection should be noted on the Bridge Memorandum.		The project core team should make recommendations at the bridge field check or on the bridge field check memorandum for handling drainage when submitting bridge survey reports for concurrence by the Bridge Division and the selection should be noted on the Bridge Memorandum.

	Bridge end drainage provisions can include concrete spill slope protection and concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [~~http~~://www.modot.org/~~business~~/~~standards_and_specs/documents/60940P.pdf~~ Standard Plans 609.40] for details.)		Bridge end drainage provisions can include concrete spill slope protection and concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [https://www.modot.org/media/16882 Standard Plans 609.40] for details.)

	==748.7.3 Bridges on a Major Road==		==748.7.3 Bridges on a Major Road==

Smithk: Per BR, revised article to include guidance for bridge end drainage

2015-06-22T18:31:25Z

Per BR, revised article to include guidance for bridge end drainage

@@ Line 1: / Line 1: @@
 [[image:748.8.jpg|right|375px]]
-Bridges are provided with a combination of slab drains and drain basins to drain the bridge deck. Bridge Division will determine the placement of slab drains. Drain basins should be provided on the down-grade side of all bridges. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter and there is a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved, and is generally shown on the culvert section sheets. The district should make a recommendation for handling drainage when submitting bridge survey reports for concurrence by the Bridge Division at the bridge field check or on the bridge field check memorandum.
+Drainage may be from the bridge deck that has not drained through deck drains or from the roadway before encroachment onto the bridge deck.  For either situation, the excess drainage water at the location of the approach area should be made to exit the approach area at the bridge ends effectively without eroding the bridge/roadway sideslopes.
-[[Category:748 Hydraulics and Drainage|748.08]]
+==748.7.1 Bridge Deck Drainage==

Smithk: 748.7 Bridge Deck Drainage moved to 748.7 Bridge Deck and Bridge End Drainage: BR revised article to include guidance for bridge end drainage

2015-06-22T18:29:37Z

748.7 Bridge Deck Drainage moved to 748.7 Bridge Deck and Bridge End Drainage: BR revised article to include guidance for bridge end drainage

← Older revision	Revision as of 13:29, 22 June 2015
(No difference)

Smithk: Per Bridge, minor clarifications as well as renumbering due to moving EPG 748.7 to EPG 747.

2014-12-09T13:08:19Z

Per Bridge, minor clarifications as well as renumbering due to moving EPG 748.7 to EPG 747.

← Older revision		Revision as of 08:08, 9 December 2014
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	[[image:748.8.jpg\|right\|375px]]		[[image:748.8.jpg\|right\|375px]]
	Bridges are provided with a combination of slab drains and drain basins to drain the bridge ~~surface~~. ~~The~~ Bridge Division will determine the placement of slab drains. Drain basins should be provided on the down-grade side of all bridges. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter and there's a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved, and is generally shown on the culvert section sheets. The district should make a recommendation for handling drainage when submitting bridge survey reports for concurrence by the Bridge Division at the bridge field check or on the bridge field check memorandum.		Bridges are provided with a combination of slab drains and drain basins to drain the bridge deck. Bridge Division will determine the placement of slab drains. Drain basins should be provided on the down-grade side of all bridges. Consideration should be given to providing drain basins on the up-grade side of bridges where the roadway has curb and gutter and there is a possibility of a significant volume of water being carried onto the bridge. Where interchange ramps with curb are involved at the end of a bridge, consideration should be given to carrying bridge drainage along the ramp curb to an outlet on the ramp in lieu of using curb and gutter or drain basins at the concrete approach pavement. The drainage facility beyond the limits shown in the standard plans is designed to meet the existing conditions at the bridge involved, and is generally shown on the culvert section sheets. The district should make a recommendation for handling drainage when submitting bridge survey reports for concurrence by the Bridge Division at the bridge field check or on the bridge field check memorandum.

	[[Category:748 Hydraulics and Drainage\|748.08]]		[[Category:748 Hydraulics and Drainage\|748.08]]

Smithk: 748.8 Bridge Drainage moved to 748.7 Bridge Deck Drainage: Per Bridge, revisions and renumbering due to moving EPG 748.7 to EPG 747

2014-12-09T13:06:42Z

748.8 Bridge Drainage moved to 748.7 Bridge Deck Drainage: Per Bridge, revisions and renumbering due to moving EPG 748.7 to EPG 747

← Older revision	Revision as of 08:06, 9 December 2014
(No difference)