Rehab vs. Replacement - Revision history

Grichards@gfnet.com at 21:05, 19 June 2023

2023-06-19T21:05:26Z

← Older revision		Revision as of 21:05, 19 June 2023
Line 36:		Line 36:
	*[[Pipe too deteriorated? Sliplining is not an option.]]		*[[Pipe too deteriorated? Sliplining is not an option.]]

	[https://3.~~238.206.13~~/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]		[https://damtoolbox.org/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]

Grichards at 23:57, 1 December 2022

2022-12-01T23:57:11Z

← Older revision		Revision as of 23:57, 1 December 2022
Line 1:		Line 1:
			[[Category:Outlet Works]]
	Can you rehab or do you need to replace?		Can you rehab or do you need to replace?
	The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.		The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for [[rehabilitation]]. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.
	*[[Conduit / Pipe Rehabilitation]]		*[[Conduit / Pipe Rehabilitation]]
	*[[Replacement]]		*[[Replacement]]
Line 10:		Line 11:
	*Installation during weather conditions not suitable for replacement.		*Installation during weather conditions not suitable for replacement.
	*It may be possible to maintain a full reservoir in some cases.		*It may be possible to maintain a full reservoir in some cases.
	*Shortened construction schedule and reduced cost when compared to replacement.		*Shortened [[construction]] schedule and reduced cost when compared to replacement.
	'''Disadvantages of Rehabilitation (CIPP, Slipline):'''		'''Disadvantages of Rehabilitation (CIPP, Slipline):'''
	*Not applicable for severely deteriorated conduits.		*Not applicable for severely deteriorated conduits.
Line 28:		Line 29:
	*If proper compaction of the embankment closure section is not obtained, potential seepage paths may exist along the junction of the closure section and existing embankment.		*If proper compaction of the embankment closure section is not obtained, potential seepage paths may exist along the junction of the closure section and existing embankment.

	''From Conduits Through Embankment Dams, FEMA 2005 (Pg. 289)''		''From Conduits Through [[Embankment Dams]], FEMA 2005 (Pg. 289)''

Grichards at 21:08, 15 September 2022

2022-09-15T21:08:17Z

← Older revision		Revision as of 21:08, 15 September 2022
Line 1:		Line 1:
	Can you rehab or do you need to replace?		Can you rehab or do you need to replace?
	The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.		The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.
	*[[Rehabilitation]]		*[[Conduit / Pipe Rehabilitation]]
	*[[Replacement]]		*[[Replacement]]
	*[[Abandonment]]		*[[Abandonment]]

Grichards at 19:56, 15 September 2022

2022-09-15T19:56:28Z

← Older revision		Revision as of 19:56, 15 September 2022
Line 37:		Line 37:
	[https://3.238.206.13/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]		[https://3.238.206.13/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]


			''Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.''
	[[Category:Example Pages]]		[[Category:Example Pages]]
	{{Revhistinf}}		{{Revhistinf}}

Camrenbt at 17:51, 23 June 2022

2022-06-23T17:51:54Z

← Older revision		Revision as of 17:51, 23 June 2022
Line 36:		Line 36:

	[https://3.238.206.13/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]		[https://3.238.206.13/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]

			[[Category:Example Pages]]
			{{Revhistinf}}

Camrenbt at 17:50, 23 June 2022

2022-06-23T17:50:22Z

← Older revision		Revision as of 17:50, 23 June 2022
Line 1:		Line 1:
	Can you rehab or do you need to replace?		Can you rehab or do you need to replace?
	The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.		The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.
			*[[Rehabilitation]]
	[[Rehabilitation]]		*[[Replacement]]
	[[Replacement]]		*[[Abandonment]]
	[[Abandonment]]


Line 36:		Line 35:
	*[[Pipe too deteriorated? Sliplining is not an option.]]		*[[Pipe too deteriorated? Sliplining is not an option.]]

	[~~[File~~: Low-Level Conduits - Rehab or Replace?~~.pdf]~~]		[https://3.238.206.13/images/3/3e/Low-Level_Conduits_-_Rehab_or_Replace%3F.pdf Low-Level Conduits - Rehab or Replace?]

Camrenbt: Created page with "Can you rehab or do you need to replace? The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative. Rehabilitation Replacement Abandonment '''Ad..."

2022-06-23T17:44:59Z

Created page with "Can you rehab or do you need to replace? The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative. Rehabilitation Replacement Abandonment '''Ad..."

New page

Can you rehab or do you need to replace?
The first question the designer needs to ask is whether the conduit should be replaced or is a good candidate for rehabilitation. Conduit replacement is likely the approach providing the greatest reliability, but that approach will most likely require draining of the reservoir and be the highest cost option. In some cases, rehabilitation provides a reasonable alternative.

[[Rehabilitation]]
[[Replacement]]
[[Abandonment]]

'''Advantages of Rehabilitation (CIPP, Slipline):'''
*Limited or no excavation required.
*Installation during weather conditions not suitable for replacement.
*It may be possible to maintain a full reservoir in some cases.
*Shortened construction schedule and reduced cost when compared to replacement.
'''Disadvantages of Rehabilitation (CIPP, Slipline):'''
*Not applicable for severely deteriorated conduits.
*Limitations for conduits with slight bends, deformities, or conduits believed to have voids along the outside of the conduit.
*Most likely will require specialized contractors and equipment for installation.
*May adversely affect seepage paths around the exterior of the conduit.
'''Advantages of Replacement (Open Cut):'''
*Visual embankment/foundation evaluation after conduit removal.
*Allows repair of surrounding embankment that may have been damaged because of deteriorated condition of existing conduit.
*Allows for easy incorporation of filters designed according to the current state-of-practice.
*Potential for increasing the hydraulic capacity of the conduit.
*Conduit Replacement does not require specialty contractors, equipment or personnel.
'''Disadvantages of Replacement (Open Cut):'''
*Unless the reservoir can be drained, the construction of a cofferdam is generally required. Inflows into the reservoir will need to be diverted. In some special cases a downstream cofferdam may also be required.
*Construction costs for removal and replacement are generally higher than for other renovation methods. Construction costs rapidly rise as the height of the embankment dam increases.
*Construction may impact reservoir operations and add risk to the downstream community.
*If proper compaction of the embankment closure section is not obtained, potential seepage paths may exist along the junction of the closure section and existing embankment.

''From Conduits Through Embankment Dams, FEMA 2005 (Pg. 289)''

Do you have enough information?
*[[⚠ Gather Information Before Design]]
*[[Pipe too deteriorated? Sliplining is not an option.]]

[[File: Low-Level Conduits - Rehab or Replace?.pdf]]