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*[https://stormwater.pca.state.mn.us/index.php?title=Operation_and_maintenance_(O%26M)_of_permeable_pavement_-_supplemental_information#Additional_References Additional references] | *[https://stormwater.pca.state.mn.us/index.php?title=Operation_and_maintenance_(O%26M)_of_permeable_pavement_-_supplemental_information#Additional_References Additional references] | ||
− | ==Overview of | + | ==Overview of typical O&M issues== |
− | <span title="Permeable pavements allow stormwater runoff to filter through surface voids into an underlying stone reservoir for temporary storage and/or infiltration. The most commonly used permeable pavement surfaces are pervious concrete, porous asphalt, and permeable interlocking concrete pavers (PICP)."> '''[https://stormwater.pca.state.mn.us/index.php?title=Permeable_pavement Permeable pavement]'''</span> practices are designed to capture, <span title="Filtration Best Management Practices (BMPs) treat urban stormwater runoff as it flows through a filtering medium, such as sand or an organic material. They are generally used on small drainage areas (5 acres or less) and are primarily designed for pollutant removal. They are effective at removing total suspended solids (TSS), particulate phosphorus, metals, and most organics. They are less effective for soluble pollutants such as dissolved phosphorus, chloride, and nitrate."> [https://stormwater.pca.state.mn.us/index.php?title=Filtration '''filter''']</span> and <span title="Infiltration Best Management Practices (BMPs) treat urban stormwater runoff as it flows through a filtering medium and into underlying soil, where it may eventually percolate into groundwater. The filtering media is typically coarse-textured and may contain organic material, as in the case of bioinfiltration BMPs."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_infiltration_Best_Management_Practices '''infiltrate''']</span> stormwater runoff through the surface and into a storage layer. These practices have fewer “green” components than other <span title="Green stormwater infrastructure (GSI) describes practices that use natural systems (or engineered systems that mimic or use natural processes) to capture, clean, and infiltrate stormwater; shade and cool surfaces and buildings; reduce flooding, create wildlife habitat; and provide other services that improve environmental quality and communities’ quality of life. (City of Tucson)"> '''green stormwater infrastructure'''</span>, but they offer a stormwater benefit over what would otherwise be impervious area. Permeable pavements are most common in dense urban areas and experience heavy vehicular and pedestrian traffic. These practices require dedicated and regular maintenance to ensure proper and long-lasting operation, but they can operate effectively for up to 30 years if maintained (TRCA, 2016). | + | <span title="Permeable pavements allow stormwater runoff to filter through surface voids into an underlying stone reservoir for temporary storage and/or infiltration. The most commonly used permeable pavement surfaces are pervious concrete, porous asphalt, and permeable interlocking concrete pavers (PICP)."> '''[https://stormwater.pca.state.mn.us/index.php?title=Permeable_pavement Permeable pavement]'''</span> practices are designed to capture, <span title="Filtration Best Management Practices (BMPs) treat urban stormwater runoff as it flows through a filtering medium, such as sand or an organic material. They are generally used on small drainage areas (5 acres or less) and are primarily designed for pollutant removal. They are effective at removing total suspended solids (TSS), particulate phosphorus, metals, and most organics. They are less effective for soluble pollutants such as dissolved phosphorus, chloride, and nitrate."> [https://stormwater.pca.state.mn.us/index.php?title=Filtration '''filter''']</span> and <span title="Infiltration Best Management Practices (BMPs) treat urban stormwater runoff as it flows through a filtering medium and into underlying soil, where it may eventually percolate into groundwater. The filtering media is typically coarse-textured and may contain organic material, as in the case of bioinfiltration BMPs."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_infiltration_Best_Management_Practices '''infiltrate''']</span> stormwater runoff through the surface and into a storage layer. These practices have fewer “green” components than other <span title="Green stormwater infrastructure (GSI) describes practices that use natural systems (or engineered systems that mimic or use natural processes) to capture, clean, and infiltrate stormwater; shade and cool surfaces and buildings; reduce flooding, create wildlife habitat; and provide other services that improve environmental quality and communities’ quality of life. (City of Tucson)"> '''green stormwater infrastructure'''</span>, but they offer a stormwater benefit over what would otherwise be impervious area. Permeable pavements are most common in dense urban areas and experience heavy vehicular and pedestrian traffic. These practices require dedicated and regular maintenance to ensure proper and long-lasting operation, but they can operate effectively for up to 30 years if maintained ([https://sustainabletechnologies.ca/app/uploads/2016/08/LID-IM-Guide-7.4-Permeable-Pavements.pdf TRCA, 2016]). |
The most frequently cited O&M concerns for pervious pavement practices include the following. | The most frequently cited O&M concerns for pervious pavement practices include the following. | ||
*Surface clogging of <span title="an area of permanent vegetation or other material used to reduce sediment, organics, nutrients, pesticides, and other contaminants from runoff and to maintain or improve water quality.> '''[https://stormwater.pca.state.mn.us/index.php?title=Overview_for_pretreatment_vegetated_filter_strips filter strips]'''</span> and / or <span title="Sediment traps and basins are settling ponds formed by excavation and/or an embankment"> [https://stormwater.pca.state.mn.us/index.php?title=Sediment_control_practices_-_Sediment_traps_and_basins '''sediment traps''']</span> caused by <span title="Carbon-based compounds, originally derived from living organisms"> '''organic material'''</span> and inorganic sediments | *Surface clogging of <span title="an area of permanent vegetation or other material used to reduce sediment, organics, nutrients, pesticides, and other contaminants from runoff and to maintain or improve water quality.> '''[https://stormwater.pca.state.mn.us/index.php?title=Overview_for_pretreatment_vegetated_filter_strips filter strips]'''</span> and / or <span title="Sediment traps and basins are settling ponds formed by excavation and/or an embankment"> [https://stormwater.pca.state.mn.us/index.php?title=Sediment_control_practices_-_Sediment_traps_and_basins '''sediment traps''']</span> caused by <span title="Carbon-based compounds, originally derived from living organisms"> '''organic material'''</span> and inorganic sediments | ||
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The sections below describe best practices to prevent or minimize these common problems. | The sections below describe best practices to prevent or minimize these common problems. | ||
− | ==Design | + | ==Design phase O&M considerations== |
Permeable pavement practices may be subject to high public visibility, <span title="Sedimentation is the process by which solids are removed from the water column by settling. Sedimentation practices include dry ponds, wet ponds, wet vaults, and other devices."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_sedimentation_Best_Management_Practices '''sedimentation''']</span> and vegetation growth and load due to vehicular traffic. Designers should design these practices in ways that prevent or minimize O&M issues. Examples include the following. | Permeable pavement practices may be subject to high public visibility, <span title="Sedimentation is the process by which solids are removed from the water column by settling. Sedimentation practices include dry ponds, wet ponds, wet vaults, and other devices."> [https://stormwater.pca.state.mn.us/index.php?title=Stormwater_sedimentation_Best_Management_Practices '''sedimentation''']</span> and vegetation growth and load due to vehicular traffic. Designers should design these practices in ways that prevent or minimize O&M issues. Examples include the following. | ||
*Limiting practice placement to low-traffic areas only | *Limiting practice placement to low-traffic areas only | ||
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For more information on see [[Operation and maintenance (O&M) of permeable pavement - supplemental information]]. | For more information on see [[Operation and maintenance (O&M) of permeable pavement - supplemental information]]. | ||
− | ==Construction | + | ==Construction phase O&M considerations== |
Proper construction methods and sequencing play a significant role in reducing O&M problems. Some key items during the construction phase include: | Proper construction methods and sequencing play a significant role in reducing O&M problems. Some key items during the construction phase include: | ||
*'''Before construction begins''' | *'''Before construction begins''' | ||
− | **Ensure that the pervious parts of the contributing drainage area are fully stabilized with <span title="A species that has been observed in the form of a naturally occurring and self-sustaining population in historical times. Non-natives do not meet this definition."> '''native vegetation'''</span> (see [https:// | + | **Ensure that the pervious parts of the contributing drainage area are fully stabilized with <span title="A species that has been observed in the form of a naturally occurring and self-sustaining population in historical times. Non-natives do not meet this definition."> '''native vegetation'''</span> (see [https://stormwater.pca.state.mn.us/index.php?title=Minnesota_plant_lists Plants for Stormwater Design]) prior to the beginning of construction. If this is not possible, use barriers or diversions to direct stormwater flows from the contributing drainage area away from the practice. |
**Install any needed erosion and <span title="practices designed to prevent or minimize loss of eroded soil at a site"> [https://stormwater.pca.state.mn.us/index.php?title=Sediment_control_practices '''sediment controls''']</span> in your construction site and prepare a [https://stormwater.pca.state.mn.us/index.php?title=SWPPP_Template_for_Small_Construction_Sites storm water pollution prevention plan] (SWPPP). | **Install any needed erosion and <span title="practices designed to prevent or minimize loss of eroded soil at a site"> [https://stormwater.pca.state.mn.us/index.php?title=Sediment_control_practices '''sediment controls''']</span> in your construction site and prepare a [https://stormwater.pca.state.mn.us/index.php?title=SWPPP_Template_for_Small_Construction_Sites storm water pollution prevention plan] (SWPPP). | ||
**Hold a pre-construction meeting to review the construction plans and the sequencing of construction. | **Hold a pre-construction meeting to review the construction plans and the sequencing of construction. | ||
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***A list of conditions that might cause failure of the practice if not properly maintained | ***A list of conditions that might cause failure of the practice if not properly maintained | ||
− | ==Post- | + | ==Post-construction phase O&M== |
Effective short and long-term operation of permeable pavement practices requires a dedicated and routine maintenance plan with clear guidelines, expectations, and schedules. Proper maintenance will not only increase the expected lifespan of the facility but will improve aesthetics and property value. A maintenance plan clarifying maintenance responsibilities should be required for all practices. | Effective short and long-term operation of permeable pavement practices requires a dedicated and routine maintenance plan with clear guidelines, expectations, and schedules. Proper maintenance will not only increase the expected lifespan of the facility but will improve aesthetics and property value. A maintenance plan clarifying maintenance responsibilities should be required for all practices. | ||
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{{:Common problems and how to troubleshoot them for permeable pavement practices}} | {{:Common problems and how to troubleshoot them for permeable pavement practices}} | ||
− | ==Maintenance | + | ==Maintenance costs== |
Maintenance costs will vary on a number of factors, including but not limited to: | Maintenance costs will vary on a number of factors, including but not limited to: | ||
*Size of the practice and its contributing drainage area | *Size of the practice and its contributing drainage area | ||
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No special equipment is necessary for winter maintenance, however, regenerative air vacuum sweepers and other specialized cleaning equipment may be necessary to remove and prevent clogs. | No special equipment is necessary for winter maintenance, however, regenerative air vacuum sweepers and other specialized cleaning equipment may be necessary to remove and prevent clogs. | ||
− | ==Useful | + | ==Useful resources== |
− | ===Additional | + | ===Additional detailed O&M information=== |
− | + | More detailed information regarding specific maintenance activities are provided in the [[Operation and maintenance (O&M) of permeable pavement - supplemental information]] page. Topics discussed include the following. | |
− | Topics discussed include | + | *Assessing the performance of permeable pavement |
− | + | *Periodic Vacuuming | |
− | + | *Deicing | |
− | + | *Maintenance Agreements | |
− | + | *Additional References | |
− | |||
− | ===Case | + | ===Case studies=== |
*Minnesota Stormwater Manual - [https://stormwater.pca.state.mn.us/index.php/Case_studies_for_permeable_pavement Case Studies for permeable pavement practices] | *Minnesota Stormwater Manual - [https://stormwater.pca.state.mn.us/index.php/Case_studies_for_permeable_pavement Case Studies for permeable pavement practices] | ||
*City of Portland, Oregon - [https://www.portlandoregon.gov/bes/article/77074#study Pervious Pavement Case Study] | *City of Portland, Oregon - [https://www.portlandoregon.gov/bes/article/77074#study Pervious Pavement Case Study] | ||
− | ===Maintenance | + | ===Maintenance training documents and videos=== |
*Washington, DC - [https://www.youtube.com/watch?v=rVNC7tt26yk DoEE Riversmart permeable pavement maintenance] | *Washington, DC - [https://www.youtube.com/watch?v=rVNC7tt26yk DoEE Riversmart permeable pavement maintenance] | ||
==O&M Resource Catalog== | ==O&M Resource Catalog== | ||
− | MPCA has compiled publicly available O&M resources related to green infrastructure. This non-exhaustive catalog is intended as a resource to practitioners. | + | MPCA has compiled [https://stormwater.pca.state.mn.us/index.php?title=Green_infrastructure_operation_and_maintenance_catalog_wiki_table publicly available O&M resources] related to green infrastructure. This non-exhaustive catalog is intended as a resource to practitioners. |
− | |||
− | + | {{:Example O&M Plans, Checklists, Reports, and Maintenance Agreements for permeable pavement}} | |
− | + | ==References== | |
− | + | *Toronto and Region Conservation Authority (TRCA). 2016. [https://sustainabletechnologies.ca/app/uploads/2016/08/LID-IM-Guide-7.4-Permeable-Pavements.pdf Low Impact Development Stormwater Management Practice Inspection and Maintenance Guide] | |
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− | ==References== | + | <noinclude> |
+ | ==Related articles== | ||
+ | ===Permeable pavement=== | ||
+ | *[[Overview for permeable pavement]] | ||
+ | *[[Types of permeable pavement]] | ||
+ | *[[Design criteria for permeable pavement]] | ||
+ | *[[Construction specifications for permeable pavement]] | ||
+ | <!--[[Construction observations for permeable pavement]]--> | ||
+ | *[[Assessing the performance of permeable pavement]] | ||
+ | *[[Operation and maintenance of permeable pavement]] | ||
+ | *[[Calculating credits for permeable pavement]] | ||
+ | <!--[[Cost-benefit considerations for permeable pavement]]--> | ||
+ | *[[Case studies for permeable pavement]] | ||
+ | *[[Green Infrastructure benefits of permeable pavement]] | ||
+ | *[[Summary of permit requirements for infiltration]] | ||
+ | *[[Permeable pavement photo gallery]] | ||
+ | *[[Additional considerations for permeable pavement]] | ||
+ | *[[Links for permeable pavement]] | ||
+ | <!--*[[External resources for permeable pavement]]--> | ||
+ | *[[References for permeable pavement]] | ||
+ | <!--*[[Supporting material for permeable pavement]]--> | ||
+ | *[[Fact sheets for permeable pavement]] | ||
+ | *[[Requirements, recommendations and information for using permeable pavement BMPs in the MIDS calculator]] | ||
+ | ===Green Infrastructure=== | ||
+ | *[[Green Stormwater Infrastructure (GSI) and sustainable stormwater management]] | ||
+ | *Operation and maintenance of green infrastructure practices | ||
+ | **[[Operation and maintenance of bioretention and other stormwater infiltration practices]] | ||
+ | **[[Operation and maintenance of bioretention and other stormwater infiltration practices - supplemental information]] | ||
+ | **[[Operation and maintenance (O&M) of tree trenches and tree boxes]] | ||
+ | **[[Operation and maintenance of tree trenches and tree boxes - supplemental information]] | ||
+ | **[[Operation and maintenance (O&M) of green roofs]] | ||
+ | **[[Operation and maintenance of green roofs - supplemental information]] | ||
+ | **[[Operation and maintenance (O&M) of swales]] | ||
+ | **[[Operation and maintenance of swales - supplemental information]] | ||
+ | **[[Operation and maintenance (O&M) of filter strips]] | ||
+ | **[[Operation and maintenance of filter strips - supplemental information]] | ||
+ | **[[Operation and maintenance (O&M) of stormwater and rainwater harvest and use/reuse practices]] | ||
+ | **[[Operation and maintenance (O&M) of stormwater and rainwater harvest and use/reuse practices - supplemental information]] | ||
+ | **[[Operation and maintenance (O&M) of stormwater treatment wetland practices]] | ||
+ | **[[Operation and maintenance (O&M) of permeable pavement]] | ||
+ | **[[Operation and maintenance (O&M) of permeable pavement - supplemental information]] | ||
− | + | [[Category:Level 3 - Best management practices/Specifications and details/Operation and maintenance]] | |
+ | </noinclude> |
This page provides guidance for operation and maintenance (O&M) of permeable pavement.
Supplemental information can be found on the page called Operation and maintenance (O&M) of permeable pavement - supplemental information . Supplemental information includes the following.
Permeable pavement practices are designed to capture, filter and infiltrate stormwater runoff through the surface and into a storage layer. These practices have fewer “green” components than other green stormwater infrastructure, but they offer a stormwater benefit over what would otherwise be impervious area. Permeable pavements are most common in dense urban areas and experience heavy vehicular and pedestrian traffic. These practices require dedicated and regular maintenance to ensure proper and long-lasting operation, but they can operate effectively for up to 30 years if maintained (TRCA, 2016). The most frequently cited O&M concerns for pervious pavement practices include the following.
The sections below describe best practices to prevent or minimize these common problems.
Permeable pavement practices may be subject to high public visibility, sedimentation and vegetation growth and load due to vehicular traffic. Designers should design these practices in ways that prevent or minimize O&M issues. Examples include the following.
Designers should consult and include any local requirements regarding green infrastructure. O&M considerations often depend on whether the practice is located on public land, private land, or in the public right of way. For example, permeable pavement in the public right of way should be located where traffic loads are most suitable.
Designers should also recognize the need to perform frequent maintenance to remove trash, check for clogging, and if necessary perform practice cleaning. Designers can incorporate design solutions to facilitate maintenance activities. Examples include providing
The designer should also provide a site-specific O&M plan that includes the following.
For more information on see Operation and maintenance (O&M) of permeable pavement - supplemental information.
Proper construction methods and sequencing play a significant role in reducing O&M problems. Some key items during the construction phase include:
Effective short and long-term operation of permeable pavement practices requires a dedicated and routine maintenance plan with clear guidelines, expectations, and schedules. Proper maintenance will not only increase the expected lifespan of the facility but will improve aesthetics and property value. A maintenance plan clarifying maintenance responsibilities should be required for all practices.
Some important post-construction considerations are provided below along with recommended maintenance standards.
The tables below provide an overview and schedule of general maintenance activities and a list of common maintenance problems and how to troubleshoot them.
Link to this table
First Year of Operation | ||||
---|---|---|---|---|
Activity | Frequency | Time Period | Level of Effort | O&M Benefita |
Check pretreatment for proper flow/filtration. If applicable, assess the health of plantings and replant as necessary. | At least twice after storm events > 0.5 inches within 30 minutes of the event, then biannually | Within the first 6 months then during Spring / Fall | 2 hours | 1 |
Check that there is no ponding | At least twice after storm events > 0.5 inches within 30 minutes of the event | Within the first 6 months | 2 hours | 1 |
Check permeable parts of drainage area to make sure they are clean of debris and evidence of erosion | Biannually | All year long | 1,5 | |
Check for accumulation of sediment and organic debris on the permeable pavement surface. | Biannually | All year long | 1,5 | |
Check for damaged pavement | Biannually | All year long, especially after winter season | 1,5 | |
Replace any joint fill material, if applicable | Annually | As needed | 1,5 | |
Practice surface cleaning (vacuuming) | Biannually | Spring / Fall | 1 | |
Perform surface infiltration test | Biannually | After practice cleaning | 1 | |
Replace any joint fill material, if applicable | Annually | As needed | 1,5 | |
Clean underdrain | Biannually | Spring / Fall | 1 | |
After First Year of Operation | ||||
Activity | Frequency | Time Period | Level of Effort per Visit | O&M Benefita |
Check pretreatment for proper flow/filtration. If applicable, assess the health of plantings and replant as necessary. | Biannually | Spring / Fall | 2 hours | 1 |
Check that there is no ponding | Biannually | All year long | 2 hours | 1 |
Check permeable parts of drainage area to make sure they are clean of debris and evidence of erosion | Biannually | All year long | 1,5 | |
Check for accumulation of sediment and organic debris on the permeable pavement surface. | Biannually | All year long | 1,5 | |
Check for damaged pavement | Biannually | All year long, especially after winter season | 1,5 | |
Replace any joint fill material, if applicable | Annually | As needed | 1,5 | |
Practice surface cleaning (vacuuming) | Biannually | Spring / Fall | 1 | |
Perform surface infiltration test | Biannually | After practice cleaning | 1 | |
Perform surface infiltration test | Biannually | After practice cleaning | 1 | |
Clean underdrain | Biannually | Spring / Fall | 1 | |
After 5+ Years of Operation (non-routine maintenance) | ||||
Activity | Frequency | Time Period | Level of Effort per Visit | O&M Benefita |
After long term operation of the practice, some occasional and infrequent maintenance activities might be required, such as bigger repairs, partial rehabilitation, or redesign of key elements of the practice. | As needed | As needed | Could be significant depending on the activity | 1,5 |
aKey to Maintenance Benefits:
b. Note that many practitioners are minimizing the use of mulch or using alternatives to mulch to control weeds. Using mulch can cause clogging of inlet, outlet, and bypass pipes, and can introduce invasive species such as jump worms. Alternatives to mulch include ground vegetation such as clover or sedges, or arranging plantings in more dense configurations so as to minimize use of mulch. |
Link to this table
Troubleshooting Common Problems | ||
---|---|---|
Symptom | Possible Causes | Solution |
Standing water on permeable pavement area |
|
|
Maintenance costs will vary on a number of factors, including but not limited to:
Maintenance costs will vary depending on the size of the practice, its contributing drainage area, type of plantings, and whether it is part of a larger GI effort. Preventative maintenance is key to minimizing major costs associated with repairs. A general rule of thumb to estimate annual maintenance costs is 3%-6% of the installation costs. Maintenance costs should account for the number of hours of labor, the cost for different types of labor expertise required, and any equipment needed to successfully complete the maintenance activities.
A study published in 2017 by ASCE shows the range of annual maintenance cost of permeable pavement systems was estimated to be $0.06/sq ft to $0.31/sq ft in 2014 dollars. This translates to costs of $0.07/sq ft to $0.37/sq ft in 2021 dollars, though the estimates were based on data from 2005-2009 (Clary, 2017).
No special equipment is necessary for winter maintenance, however, regenerative air vacuum sweepers and other specialized cleaning equipment may be necessary to remove and prevent clogs.
More detailed information regarding specific maintenance activities are provided in the Operation and maintenance (O&M) of permeable pavement - supplemental information page. Topics discussed include the following.
MPCA has compiled publicly available O&M resources related to green infrastructure. This non-exhaustive catalog is intended as a resource to practitioners.
Example O&M plans, checklists, reports, and maintenance agreements
Link to this table
Document | Link |
---|---|
Operation & maintenance plan |
|
Construction phase inspection checklist |
|
O&M inspection checklist |
|
O&M example report |
|
Maintenance Agreements |
|
This page was last edited on 30 December 2022, at 14:03.