750.7 Non-Hydraulic Considerations - Revision history

Legged1: /* 750.7.2.2 Roadways with ADT ≤ 3500 */ corrected PVC diameter limit

2024-05-20T18:55:43Z

750.7.2.2 Roadways with ADT ≤ 3500: corrected PVC diameter limit

← Older revision		Revision as of 13:55, 20 May 2024
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	Pipes of 12 in. and 15 in. are not used for crossroad culverts, except where the use of an 18 in. pipe will create an unsightly or impracticable drainage condition.		Pipes of 12 in. and 15 in. are not used for crossroad culverts, except where the use of an 18 in. pipe will create an unsightly or impracticable drainage condition.

	Corrugated polyethylene pipe (Type S) and polyvinyl chloride pipe are double walled, full circular cross section pipes, with an outer corrugated wall and a smooth inner liner. Only 12 to 60 in. diameter sizes of corrugated polyethylene, or 12 to 48 in. diameter sizes of PVC pipe, are approved for use on highway projects. Corrugations may be either annular or helical. Headwall protection is provided by means of a beveled pipe end treatment, safety slope end section, or metal or concrete flared end sections. [https://www.modot.org/missouri-standard-specifications-highway-construction Section 728] of the Standard Specifications require all PVC pipes to have an end section of one of the other Group B pipe materials to protect from ultraviolet degradation where the end of the pipe is exposed.		Corrugated polyethylene pipe (Type S) and polyvinyl chloride pipe are double walled, full circular cross section pipes, with an outer corrugated wall and a smooth inner liner. Only 12 to 60 in. diameter sizes of corrugated polyethylene, or 12 to 36 in. diameter sizes of PVC pipe, are approved for use on highway projects. Corrugations may be either annular or helical. Headwall protection is provided by means of a beveled pipe end treatment, safety slope end section, or metal or concrete flared end sections. [https://www.modot.org/missouri-standard-specifications-highway-construction Section 728] of the Standard Specifications require all PVC pipes to have an end section of one of the other Group B pipe materials to protect from ultraviolet degradation where the end of the pipe is exposed.

	===750.7.2.3 Roadways and Roadside Applications with ADT < 1700===		===750.7.2.3 Roadways and Roadside Applications with ADT < 1700===

Legged1: /* 750.7.2.4 Outer Roadway Drainage Structures */ removed information that's covered in 750.7.6

2024-05-20T18:55:07Z

750.7.2.4 Outer Roadway Drainage Structures: removed information that's covered in 750.7.6

← Older revision		Revision as of 13:55, 20 May 2024
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	Outer roadway drainage structures shall be selected by ADT as described above. Continuous drainage structures extending under outer roadways are designed to the same standard as required for the portion of the structure under the main roadway. Since a continuous drainage structure usually increases the standard for the portion under the outer roadway, it is usually more economical to use independent structures. Where continuous structures are used, the runoff between the outer roadway and the main roadway is usually carried into the crossroad structure by drop inlets and pipe. Where the crossroad structure is a relatively small pipe, the drop inlet is constructed in the crossroad structure.		Outer roadway drainage structures shall be selected by ADT as described above. Continuous drainage structures extending under outer roadways are designed to the same standard as required for the portion of the structure under the main roadway. Since a continuous drainage structure usually increases the standard for the portion under the outer roadway, it is usually more economical to use independent structures. Where continuous structures are used, the runoff between the outer roadway and the main roadway is usually carried into the crossroad structure by drop inlets and pipe. Where the crossroad structure is a relatively small pipe, the drop inlet is constructed in the crossroad structure.

	For drainage applications other than crossroad pipes, such as entrances, side roads and median drainage, Group C pipe may be specified.		For drainage applications other than crossroad pipes, such as entrances, side roads and median drainage, Group C pipe may be specified. In special cases where low clearance exists and the structure is essentially at right angles on roads with less than 400 ADT, pipe arches with flared end sections may be specified.

	~~Flared end sections or beveled pipe end treatment are specified at both ends of pipe structures 66 in. or less in diameter~~. In special cases where low clearance exists and the structure is essentially at right angles on roads with less than 400 ADT, pipe arches with flared end sections may be specified.

	===750.7.2.5 Installations for Special Situations===		===750.7.2.5 Installations for Special Situations===

Hoskir: /* 750.7.6 End Treatment */ fixed table formatting in 750.7.6

2024-05-20T15:43:30Z

750.7.6 End Treatment: fixed table formatting in 750.7.6

← Older revision		Revision as of 10:43, 20 May 2024
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	\| colspan="2" \| <center>Crossroad Culverts</center>\|\| colspan="2" \| <center>Parallel Culverts</center>\|\| rowspan="4" \| <center>Permissible to have no end treatment; consider FES or BET especially for ADT ≥ 400</center>		\| colspan="2" \| <center>Crossroad Culverts</center>\|\| colspan="2" \| <center>Parallel Culverts</center>\|\| rowspan="4" \| <center>Permissible to have no end treatment; consider FES or BET especially for ADT ≥ 400</center>
	\|-		\|-
	\| <center>Single Pipes</center> \|\| <center>Multiple Pipes</center> \|\| <center>Single Pipes</center> \|\| <center>Multiple Pipes</center> \|\|		\| <center>Single Pipes</center> \|\| <center>Multiple Pipes</center> \|\| <center>Single Pipes</center> \|\| <center>Multiple Pipes</center>
	\|-		\|-
	\| <center>≤ 36 in. diameter use BET or FES</center>\|\| <center>≤ 30 in. diameter use BET or FES</center>\|\| <center>≤ 24 in. diameter BET or FES</center>\|\| rowspan="2" \| <center>Consider SSES for       ≤ 24 in. diameter</center> \|\|		\| <center>≤ 36 in. diameter use BET or FES</center>\|\| <center>≤ 30 in. diameter use BET or FES</center>\|\| <center>≤ 24 in. diameter BET or FES</center>\|\| rowspan="2" \| <center>Consider SSES for       ≤ 24 in. diameter</center>
	\|-		\|-
	\| <center>> 36 in. diameter use SSES</center> \|\| <center>> 30 in. diameter use SSES</center> \|\| <center>> 24 in. diameter use SSES</center> ~~\|\| \|\|~~		\| <center>> 36 in. diameter use SSES</center> \|\| <center>> 30 in. diameter use SSES</center> \|\| <center>> 24 in. diameter use SSES</center>
	\|-		\|-
	\| colspan="5" \| FES = Flared End Section<br/>BET = Beveled Pipe End Treatment<br/>SSES = Safety Slope End Section		\| colspan="5" \| FES = Flared End Section<br/>BET = Beveled Pipe End Treatment<br/>SSES = Safety Slope End Section

Hoskir: /* 750.7.2 Types */ updated per RR3701

2023-07-17T18:59:40Z

750.7.2 Types: updated per RR3701

← Older revision		Revision as of 13:59, 17 July 2023
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	\| Reinforced Concrete \|\| Group A Pipe \|\| Group A Pipe		\| Reinforced Concrete \|\| Group A Pipe \|\| Group A Pipe
	\|-		\|-
	\| Vitrified Clay \|\| \|\|Group B Pipe		\| Vitrified Clay \|\| \|\| Group B Pipe
	\|-		\|-
	\|Aluminum Coated Steel\|\| ~~High Density Polyethylene~~ ≤60 in. \|\|~~Zinc-Coated Steel~~		\| Aluminum Coated Steel \|\| Double Wall Polypropylene ≤60 in. \|\|
	\|-		\|-
	\|Polymer Coated Steel\|\| ~~Steel Reinforced~~ Polyethylene ≤60 in. \|\|~~Bituminous~~-Coated Steel		\| Polymer Coated Steel \|\| High Density Polyethylene, Corrugated ≤60 in. \|\| Zinc-Coated Steel
	\|-		\|-
	\|Aluminum Alloy \|\|~~rowspan="6" colspan="2"~~\|		\| Aluminum Alloy \|\| Steel Reinforced Polyethylene ≤60 in. \|\| Bituminous-Coated Steel
	\|-		\|-
	\|Triple Wall Polypropylene ≤60 in.		\| Triple Wall Polypropylene ≤60 in. \|\| rowspan="6" colspan="2" \|
	\|-		\|-
	\|Double Wall Polypropylene ≤30 in		\| Double Wall Polypropylene ≤30 in.
	\|-		\|-
	\|High Density Polyethylene ≤24 in.		\| High Density Polyethylene, Corrugated ≤24 in.
	\|-		\|-
	\|Steel Reinforced Polyethylene ≤24 in.		\| Steel Reinforced Polyethylene ≤24 in.
	\|-		\|-
	\|Polyvinyl chloride ≤36 in.		\| Polyvinyl chloride ≤36 in.
	\|}		\|}

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	===750.7.2.1 Roadways with ADT > 3500===		===750.7.2.1 Roadways with ADT > 3500===
	For roadways with ADT > 3500, ~~reinforced concrete~~ pipe will be specified for crossroad structures, except for the following conditions:		For roadways with ADT > 3500, Group A pipe will be specified for crossroad structures, except for the following conditions:

	*Reinforced concrete box culverts are specified when it is more economical to build the reinforced box culvert than it is to provide an equivalent pipe culvert.		*Reinforced concrete box culverts are specified when it is more economical to build the reinforced box culvert than it is to provide an equivalent pipe culvert.
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	For roadways, side roads, and entrances with ADT < 1700 Group C pipe should be specified using the same method for corrugated and smooth wall Group B pipe as explained in [[#750.7.2.2 Roadways with ADT ≤ 3500\|Roadways with ADT ≤ 3500]]. For information regarding replacement of failed driveway drainage pipes see [[:Category:941 Permits and Access Requests#941.9.8.4 Drainage Structures\|EPG 941.9.8.4 Drainage Structures]].		For roadways, side roads, and entrances with ADT < 1700 Group C pipe should be specified using the same method for corrugated and smooth wall Group B pipe as explained in [[#750.7.2.2 Roadways with ADT ≤ 3500\|Roadways with ADT ≤ 3500]]. For information regarding replacement of failed driveway drainage pipes see [[:Category:941 Permits and Access Requests#941.9.8.4 Drainage Structures\|EPG 941.9.8.4 Drainage Structures]].

	===750.7.2.4 ~~Other~~ Roadway Drainage Structures===		===750.7.2.4 Outer Roadway Drainage Structures===
	Outer roadway drainage structures shall be selected by ADT as described above. Continuous drainage structures extending under outer roadways are designed to the same standard as required for the portion of the structure under the main roadway. Since a continuous drainage structure usually increases the standard for the portion under the outer roadway, it is usually more economical to use independent structures. Where continuous structures are used, the runoff between the outer roadway and the main roadway is usually carried into the crossroad structure by drop inlets and pipe. Where the crossroad structure is a relatively small pipe, the drop inlet is constructed in the crossroad structure.		Outer roadway drainage structures shall be selected by ADT as described above. Continuous drainage structures extending under outer roadways are designed to the same standard as required for the portion of the structure under the main roadway. Since a continuous drainage structure usually increases the standard for the portion under the outer roadway, it is usually more economical to use independent structures. Where continuous structures are used, the runoff between the outer roadway and the main roadway is usually carried into the crossroad structure by drop inlets and pipe. Where the crossroad structure is a relatively small pipe, the drop inlet is constructed in the crossroad structure.

Smithk: updated several broken links

2022-02-01T17:18:34Z

updated several broken links

← Older revision		Revision as of 12:18, 1 February 2022
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	:1) No guardrail required if [[231.2 Clear Zones\|clear zones]] are provided.		:1) No guardrail required if [[231.2 Clear Zones\|clear zones]] are provided.
	:2) For smaller box culverts a long span guardrail system as shown in [~~http~~://www.modot.org/~~business~~/~~standards_and_specs/documents/60600.pdf~~ Standard Plan 606.00] may be used to eliminate posts over the culvert.		:2) For smaller box culverts a long span guardrail system as shown in [https://www.modot.org/media/16856 Standard Plan 606.00] may be used to eliminate posts over the culvert.

	Guardrail posts attached to the top slab of the culvert shall have at least a 10” distance between the face of the headwall and the center of the guardrail post.		Guardrail posts attached to the top slab of the culvert shall have at least a 10” distance between the face of the headwall and the center of the guardrail post.
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	==750.7.5 Pipe Headwalls==		==750.7.5 Pipe Headwalls==
	Type S pipe headwalls may be used in lieu of drop inlets for median pipes for medians 60 ft. wide or wider. Details for Type S pipe headwalls are shown on [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/60405.pdf~~ Standard Plan 604.05].		Type S pipe headwalls may be used in lieu of drop inlets for median pipes for medians 60 ft. wide or wider. Details for Type S pipe headwalls are shown on [https://www.modot.org/media/16844 Standard Plan 604.05].

	==750.7.6 End Treatment==		==750.7.6 End Treatment==
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	===750.7.6.1 Flared End Sections===		===750.7.6.1 Flared End Sections===
	Flared end sections may be used on concrete, metal, or plastic pipes as shown on [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/73200.pdf~~ Standard Plan 732.00]. Where flared end sections are used on skewed pipe, the section is placed on the same line as the pipe and the fill slope is warped to fit.		Flared end sections may be used on concrete, metal, or plastic pipes as shown on [https://www.modot.org/media/16975 Standard Plan 732.00]. Where flared end sections are used on skewed pipe, the section is placed on the same line as the pipe and the fill slope is warped to fit.

	===750.7.6.2 Beveled Pipe End Treatment===		===750.7.6.2 Beveled Pipe End Treatment===
	Beveled pipe end treatment may be used on either corrugated metal or plastic pipes as shown on [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/73205.pdf~~ Standard Plan 732.05]. All beveled pipes use encasement. Corrugated steel pipe-arches are not beveled. In general, the bevel should not be flatter than 1V:6H nor should the skew exceed 15 degrees. If these controls are exceeded, special consideration is given to the use of headwalls, riprap, or slope pavement to stiffen the structure against uneven loading from the embankment and the dynamic forces of the water. Proposed designs for these conditions are submitted to the Support Center for approval.		Beveled pipe end treatment may be used on either corrugated metal or plastic pipes as shown on [https://www.modot.org/media/16976 Standard Plan 732.05]. All beveled pipes use encasement. Corrugated steel pipe-arches are not beveled. In general, the bevel should not be flatter than 1V:6H nor should the skew exceed 15 degrees. If these controls are exceeded, special consideration is given to the use of headwalls, riprap, or slope pavement to stiffen the structure against uneven loading from the embankment and the dynamic forces of the water. Proposed designs for these conditions are submitted to the Support Center for approval.

	===750.7.6.3 Safety Slope End Sections===		===750.7.6.3 Safety Slope End Sections===
	Safety slope end sections are used to reduce the potential for vehicle snagging. End sections with two types of safety treatment for 1V:4H, 1V:6H and 1V:10H slopes are shown in [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/73210.pdf~~ Standard Plan 732.10]. The 2B (Summary of Quantities) sheet should indicate the slope of the end section and whether the end section is for a crossroad or parallel drainage structure.		Safety slope end sections are used to reduce the potential for vehicle snagging. End sections with two types of safety treatment for 1V:4H, 1V:6H and 1V:10H slopes are shown in [https://www.modot.org/media/16977 Standard Plan 732.10]. The 2B (Summary of Quantities) sheet should indicate the slope of the end section and whether the end section is for a crossroad or parallel drainage structure.

	===750.7.6.4 Floodgates===		===750.7.6.4 Floodgates===
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	==750.7.17 Slotted Drains==		==750.7.17 Slotted Drains==
	Slotted drains may be used to assist in drainage across entrances or very short sections of the roadway edge. Consistent hydraulic characteristics are not available, so slotted drains should not be expected to completely drain a pavement area. Chapter 4 of the FHWA Hydraulic Engineering Circular 22, "HEC-22 Urban Drainage Design" provides guidance for the design of slotted drains. The plans provide for the contractor to select among different styles of slotted drains (See [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/60470.pdf~~ Standard Plan 604.70]). The diameter of pipe and length of slotted drain are specified in the plans.		Slotted drains may be used to assist in drainage across entrances or very short sections of the roadway edge. Consistent hydraulic characteristics are not available, so slotted drains should not be expected to completely drain a pavement area. Chapter 4 of the FHWA Hydraulic Engineering Circular 22, "HEC-22 Urban Drainage Design" provides guidance for the design of slotted drains. The plans provide for the contractor to select among different styles of slotted drains (See [https://www.modot.org/media/16854 Standard Plan 604.70]). The diameter of pipe and length of slotted drain are specified in the plans.



	[[Category:750 Hydraulic Analysis]]		[[Category:750 Hydraulic Analysis]]

Smithk: /* 750.7.2.2 Roadways with ADT ≤ 3500 */

2022-02-01T17:13:53Z

750.7.2.2 Roadways with ADT ≤ 3500

← Older revision		Revision as of 12:13, 1 February 2022
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	Pipes of 12 in. and 15 in. are not used for crossroad culverts, except where the use of an 18 in. pipe will create an unsightly or impracticable drainage condition.		Pipes of 12 in. and 15 in. are not used for crossroad culverts, except where the use of an 18 in. pipe will create an unsightly or impracticable drainage condition.

	Corrugated polyethylene pipe (Type S) and polyvinyl chloride pipe are double walled, full circular cross section pipes, with an outer corrugated wall and a smooth inner liner. Only 12 to 60 in. diameter sizes of corrugated polyethylene, or 12 to 48 in. diameter sizes of PVC pipe, are approved for use on highway projects. Corrugations may be either annular or helical. Headwall protection is provided by means of a beveled pipe end treatment, safety slope end section, or metal or concrete flared end sections. [~~http~~://modot.~~mo.gov~~/~~business/standards_and_specs/Sec0728.pdf~~ Section 728] of the Standard Specifications require all PVC pipes to have an end section of one of the other Group B pipe materials to protect from ultraviolet degradation where the end of the pipe is exposed.		Corrugated polyethylene pipe (Type S) and polyvinyl chloride pipe are double walled, full circular cross section pipes, with an outer corrugated wall and a smooth inner liner. Only 12 to 60 in. diameter sizes of corrugated polyethylene, or 12 to 48 in. diameter sizes of PVC pipe, are approved for use on highway projects. Corrugations may be either annular or helical. Headwall protection is provided by means of a beveled pipe end treatment, safety slope end section, or metal or concrete flared end sections. [https://www.modot.org/missouri-standard-specifications-highway-construction Section 728] of the Standard Specifications require all PVC pipes to have an end section of one of the other Group B pipe materials to protect from ultraviolet degradation where the end of the pipe is exposed.

	===750.7.2.3 Roadways and Roadside Applications with ADT < 1700===		===750.7.2.3 Roadways and Roadside Applications with ADT < 1700===

Smithk: /* 750.7.3 Environmental Requirements */

2022-02-01T17:10:51Z

750.7.3 Environmental Requirements

← Older revision		Revision as of 12:10, 1 February 2022
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	==750.7.3 Environmental Requirements==		==750.7.3 Environmental Requirements==

	[https://epg.modot.org/index.php?title=127.4_Wetlands_and_Streams#127.4.1.~~1__Overview~~ Waters of the United States] are under the jurisdiction of the U.S. Army Corps of Engineers (COE) which has implemented a [http://usace.contentdm.oclc.org/utils/getfile/collection/p16021coll11/id/2654 Regional Condition], affecting new and replacement culverts, to [[127.4 Wetlands and Streams\|Section 404 Nationwide Permits]] (all Nationwide Permits including NWP 14, Linear Transportation Projects and NWP 3, Maintenance Activities) for Missouri.		[https://epg.modot.org/index.php?title=127.4_Wetlands_and_Streams#127.4.1.1_Overview Waters of the United States] are under the jurisdiction of the U.S. Army Corps of Engineers (COE) which has implemented a [http://usace.contentdm.oclc.org/utils/getfile/collection/p16021coll11/id/2654 Regional Condition], affecting new and replacement culverts, to [[127.4 Wetlands and Streams\|Section 404 Nationwide Permits]] (all Nationwide Permits including NWP 14, Linear Transportation Projects and NWP 3, Maintenance Activities) for Missouri.

	If meeting the requirements of the Regional Condition is not feasible, or requires unreasonable measures or expense, a waiver can be requested from the COE. For more information, or to request a waiver, contact a Wetlands Specialist in the [https://modotgov.sharepoint.com/sites/DE/SitePages/Environmental-&-Historic-Preservation.aspx Environmental Section] of the Design Division.		If meeting the requirements of the Regional Condition is not feasible, or requires unreasonable measures or expense, a waiver can be requested from the COE. For more information, or to request a waiver, contact a Wetlands Specialist in the [https://modotgov.sharepoint.com/sites/DE/SitePages/Environmental-&-Historic-Preservation.aspx Environmental Section] of the Design Division.

Smithk: updating broken BR division links

2021-12-17T20:56:51Z

updating broken BR division links

← Older revision		Revision as of 15:56, 17 December 2021
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	:* [https://epg.modot.org/index.php?title=748.2_Roadway_Design_Criteria#748.2.3_Overtopping_Flood Overtopping Flood] discharge and frequency.		:* [https://epg.modot.org/index.php?title=748.2_Roadway_Design_Criteria#748.2.3_Overtopping_Flood Overtopping Flood] discharge and frequency.

	Multiple cell box structures for drainage areas of 1000 acres and under require that the final plans be done by Bridge Division. Where such plans are required, [~~http~~://~~wwwi~~/~~intranet~~/br~~/default.htm~~ Bridge Division] shall be furnished with the grade across the structure, typical section, and any other necessary information.		Multiple cell box structures for drainage areas of 1000 acres and under require that the final plans be done by Bridge Division. Where such plans are required, [https://modotgov.sharepoint.com/sites/br Bridge Division] shall be furnished with the grade across the structure, typical section, and any other necessary information.

	===750.7.4.4 Size===		===750.7.4.4 Size===
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	==750.7.8 Fill Settlements==		==750.7.8 Fill Settlements==
	Fill settlements can seriously affect concrete box structures by opening joints and cracks sufficiently to allow the fill around the culvert to infiltrate into the culvert, thereby creating voids which can cause the roadbed to fail. In areas subject to large settlements, other structure types are considered or the box culvert is designed to withstand the settlement. This requires special box culvert designs and where box culverts are to be so designed, [~~http~~://~~wwwi~~/~~intranet~~/br~~/default.htm~~ Bridge Division] is furnished with full information, including culvert sections, grades, and anticipated settlement. Box culverts with special collars around joints have been successfully designed and used in areas subject to large fill settlements. Since such structures are expensive, it is sometimes more economical to use other structure types, such as flexible pipe.		Fill settlements can seriously affect concrete box structures by opening joints and cracks sufficiently to allow the fill around the culvert to infiltrate into the culvert, thereby creating voids which can cause the roadbed to fail. In areas subject to large settlements, other structure types are considered or the box culvert is designed to withstand the settlement. This requires special box culvert designs and where box culverts are to be so designed, [https://modotgov.sharepoint.com/sites/br Bridge Division] is furnished with full information, including culvert sections, grades, and anticipated settlement. Box culverts with special collars around joints have been successfully designed and used in areas subject to large fill settlements. Since such structures are expensive, it is sometimes more economical to use other structure types, such as flexible pipe.

	==750.7.9 Camber in Culverts==		==750.7.9 Camber in Culverts==
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	==750.7.10 Culvert Extensions==		==750.7.10 Culvert Extensions==
	All culvert extensions, both boxes and pipes, are extended with structures meeting current design requirements and standards, regardless of the type of standard of the existing structure. Pipe collars, as detailed on [https://www.modot.org/media/16853 Standard Plan 604.40], are used to connect different types of pipe, and concrete pipe to concrete pipe. For extension of box culverts [https://epg.modot.org/index.php?title=751.8_LRFD_Concrete_Box_Culverts#751.8.3.4_Miscellaneous EPG 751.8.3.4 Miscellaneous, Culvert Extensions]. Additional fills on existing box culverts may require a structural analysis of the existing structure by the Bridge Division. If so, [~~http~~://~~wwwi~~/~~intranet~~/br~~/default.htm~~ Bridge Division] is furnished a print of the completed culvert section and the standard to which the existing structure was designed, if known, for their use in making the analysis.		All culvert extensions, both boxes and pipes, are extended with structures meeting current design requirements and standards, regardless of the type of standard of the existing structure. Pipe collars, as detailed on [https://www.modot.org/media/16853 Standard Plan 604.40], are used to connect different types of pipe, and concrete pipe to concrete pipe. For extension of box culverts [https://epg.modot.org/index.php?title=751.8_LRFD_Concrete_Box_Culverts#751.8.3.4_Miscellaneous EPG 751.8.3.4 Miscellaneous, Culvert Extensions]. Additional fills on existing box culverts may require a structural analysis of the existing structure by the Bridge Division. If so, [https://modotgov.sharepoint.com/sites/br Bridge Division] is furnished a print of the completed culvert section and the standard to which the existing structure was designed, if known, for their use in making the analysis.

	The unit cost for pipe or box extensions is typically greater than the unit cost for new construction of pipe or box culverts.		The unit cost for pipe or box extensions is typically greater than the unit cost for new construction of pipe or box culverts.
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	===750.7.11.3 Maximum Fill Heights===		===750.7.11.3 Maximum Fill Heights===
	====750.7.11.3.1 Box Culverts====		====750.7.11.3.1 Box Culverts====
	For design fill heights of less than 1 ft. or exceeding 50 ft., a special design request is made to [~~http~~://~~wwwi~~/~~intranet~~/br~~/default.htm~~ Bridge Division]. A plat showing the culvert location and a cross section at the culvert location should be provided with the request. A special sheet with structural details will be returned to the district. Input on pay item quantities will also be provided.		For design fill heights of less than 1 ft. or exceeding 50 ft., a special design request is made to [https://modotgov.sharepoint.com/sites/br Bridge Division]. A plat showing the culvert location and a cross section at the culvert location should be provided with the request. A special sheet with structural details will be returned to the district. Input on pay item quantities will also be provided.

	====750.7.11.3.2 Pipes====		====750.7.11.3.2 Pipes====

Smithk: /* 750.7.3 Environmental Requirements */ updated link

2021-11-24T18:09:16Z

750.7.3 Environmental Requirements: updated link

← Older revision		Revision as of 13:09, 24 November 2021
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	[https://epg.modot.org/index.php?title=127.4_Wetlands_and_Streams#127.4.1.1__Overview Waters of the United States] are under the jurisdiction of the U.S. Army Corps of Engineers (COE) which has implemented a [http://usace.contentdm.oclc.org/utils/getfile/collection/p16021coll11/id/2654 Regional Condition], affecting new and replacement culverts, to [[127.4 Wetlands and Streams\|Section 404 Nationwide Permits]] (all Nationwide Permits including NWP 14, Linear Transportation Projects and NWP 3, Maintenance Activities) for Missouri.		[https://epg.modot.org/index.php?title=127.4_Wetlands_and_Streams#127.4.1.1__Overview Waters of the United States] are under the jurisdiction of the U.S. Army Corps of Engineers (COE) which has implemented a [http://usace.contentdm.oclc.org/utils/getfile/collection/p16021coll11/id/2654 Regional Condition], affecting new and replacement culverts, to [[127.4 Wetlands and Streams\|Section 404 Nationwide Permits]] (all Nationwide Permits including NWP 14, Linear Transportation Projects and NWP 3, Maintenance Activities) for Missouri.

	If meeting the requirements of the Regional Condition is not feasible, or requires unreasonable measures or expense, a waiver can be requested from the COE. For more information, or to request a waiver, contact a Wetlands Specialist in the [~~http~~://sp/sites/~~de/environmental_historic_pres~~/SitePages/~~Home~~.aspx Environmental Section] of the Design Division.		If meeting the requirements of the Regional Condition is not feasible, or requires unreasonable measures or expense, a waiver can be requested from the COE. For more information, or to request a waiver, contact a Wetlands Specialist in the [https://modotgov.sharepoint.com/sites/DE/SitePages/Environmental-&-Historic-Preservation.aspx Environmental Section] of the Design Division.

	<center>		<center>

Smithk: Updated broken standard plan links

2021-11-18T20:49:24Z

Updated broken standard plan links

← Older revision		Revision as of 15:49, 18 November 2021
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	==750.7.10 Culvert Extensions==		==750.7.10 Culvert Extensions==
	All culvert extensions, both boxes and pipes, are extended with structures meeting current design requirements and standards, regardless of the type of standard of the existing structure. Pipe collars, as detailed on [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/60440.pdf~~ Standard Plan 604.40], are used to connect different types of pipe, and concrete pipe to concrete pipe. For extension of box culverts [https://epg.modot.org/index.php?title=751.8_LRFD_Concrete_Box_Culverts#751.8.3.4_Miscellaneous EPG 751.8.3.4 Miscellaneous, Culvert Extensions]. Additional fills on existing box culverts may require a structural analysis of the existing structure by the Bridge Division. If so, [http://wwwi/intranet/br/default.htm Bridge Division] is furnished a print of the completed culvert section and the standard to which the existing structure was designed, if known, for their use in making the analysis.		All culvert extensions, both boxes and pipes, are extended with structures meeting current design requirements and standards, regardless of the type of standard of the existing structure. Pipe collars, as detailed on [https://www.modot.org/media/16853 Standard Plan 604.40], are used to connect different types of pipe, and concrete pipe to concrete pipe. For extension of box culverts [https://epg.modot.org/index.php?title=751.8_LRFD_Concrete_Box_Culverts#751.8.3.4_Miscellaneous EPG 751.8.3.4 Miscellaneous, Culvert Extensions]. Additional fills on existing box culverts may require a structural analysis of the existing structure by the Bridge Division. If so, [http://wwwi/intranet/br/default.htm Bridge Division] is furnished a print of the completed culvert section and the standard to which the existing structure was designed, if known, for their use in making the analysis.

	The unit cost for pipe or box extensions is typically greater than the unit cost for new construction of pipe or box culverts.		The unit cost for pipe or box extensions is typically greater than the unit cost for new construction of pipe or box culverts.
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	==750.7.15 Connections==		==750.7.15 Connections==
	The plans provide for connecting new structures to existing structures, and connecting different types of new structures. The plans do not include an item for the connection of pipes to existing manholes, box culverts, drop inlets or sewer pipes. The plans do include the pipe collar item for connecting different types of pipe or different sizes of pipes. Details for pipe collars are shown on [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/60440.pdf~~ Standard Plan 604.40].		The plans provide for connecting new structures to existing structures, and connecting different types of new structures. The plans do not include an item for the connection of pipes to existing manholes, box culverts, drop inlets or sewer pipes. The plans do include the pipe collar item for connecting different types of pipe or different sizes of pipes. Details for pipe collars are shown on [https://www.modot.org/media/16853 Standard Plan 604.40].

	==750.7.16 Culvert Cleanout==		==750.7.16 Culvert Cleanout==